CN220296598U - Circumferential and transverse and longitudinal adjusting mechanism - Google Patents

Abstract

The utility model relates to the technical field of machine tool accessories, and discloses a circumferential and transverse and longitudinal adjusting mechanism, which comprises a fixed base, wherein the bottom of the fixed base is provided with a connecting datum plane, a turntable seat is rotationally connected to the fixed base, the rotation axis of the turntable seat is vertical to the connecting datum plane of the fixed base, a longitudinal sliding block is slidingly connected to the turntable seat, a transverse sliding block is slidingly connected to the longitudinal sliding block, and the sliding direction of the longitudinal sliding block is vertical to the sliding direction of the transverse sliding block and is parallel to the connecting datum plane of the fixed base; the fixed base and the turntable seat, the turntable seat and the longitudinal sliding block, and the longitudinal sliding block and the transverse sliding block can be locked. The circumferential and transverse and longitudinal adjusting mechanism can be conveniently assembled on or disassembled from the machine tool as a whole, and the clamp of the tool or the clamp of the workpiece is fixedly connected to the transverse sliding block, so that circumferential, transverse and longitudinal adjustment can be manually performed, and the circumferential and transverse and longitudinal adjusting mechanism has good universality.

Description

Circumferential and transverse and longitudinal adjusting mechanism

Technical Field

The utility model relates to the technical field of machine tool accessories, in particular to a circumferential and transverse and longitudinal adjusting mechanism.

Background

The field of machining is often applied to general-purpose machine tools such as lathes and grinding machines, and also to other nonstandard machine tools, on which respective tool holders or workpiece holders are provided, and on which adjustment mechanisms for the tool holders or workpiece holders are provided. The form of the adjusting mechanism is usually set according to the requirement of the processing machine tool, and the adjusting mechanism can only be used on the processing machine tool where the adjusting mechanism is positioned, so that the universality is poor. In addition, these adjustment mechanisms are mainly aimed at achieving feeding operations, not for accurate positioning, so that it is difficult to achieve manual adjustment for accurate positioning.

Disclosure of Invention

The utility model provides a circumferential and transverse and longitudinal adjusting mechanism for overcoming the defects in the prior art. The utility model achieves the above object by the following technical scheme.

The circumference and transverse and longitudinal adjusting mechanism comprises a fixed base, wherein the bottom of the fixed base is provided with a connecting datum plane, the fixed base is rotationally connected with a turntable seat, the rotation axis of the turntable seat is vertical to the connecting datum plane of the fixed base, the turntable seat is slidingly connected with a longitudinal sliding block, the longitudinal sliding block is slidingly connected with a transverse sliding block, and the sliding direction of the longitudinal sliding block is vertical to the sliding direction of the transverse sliding block and is parallel to the connecting datum plane of the fixed base; the fixed base and the turntable seat, the turntable seat and the longitudinal sliding block, and the longitudinal sliding block and the transverse sliding block can be locked.

The connecting datum plane of the fixed base in the scheme is the assembly datum of the circumference and transverse and longitudinal adjusting mechanism, and other parts in the scheme are directly or indirectly connected or movably connected to the fixed base, so that the circumference and transverse and longitudinal adjusting mechanism of the scheme can be conveniently and integrally assembled on a machine tool or integrally disassembled from the machine tool, and the machine tool has good universality. The sliding connection of the longitudinal slide blocks on the turntable seat can be realized in various ways, for example, a dovetail sliding structure is arranged between the turntable seat and the longitudinal slide blocks. The sliding connection of the transverse sliding block on the longitudinal sliding block can be realized in various ways. In the scheme, the rotation of the turntable seat, the sliding of the longitudinal sliding block and the transverse sliding block are adjusted manually, so that the turntable seat is more visual and convenient, and the positioning is more accurate. After the adjustment, the fixed base, the turntable seat, the longitudinal sliding block and the transverse sliding block can be respectively locked and fixed, for example, the fixed base, the turntable seat, the longitudinal sliding block and the transverse sliding block are locked and fixed by bolts, and then the manual feeding operation or the automatic feeding operation and the like can be realized along with a machine tool.

As a further improved structural form, the fixed base and the turntable seat are rotationally connected through a thrust bearing, an outer gear ring is fixedly connected to the turntable seat, the rotation axes of the outer gear ring and the turntable seat are coaxial, a manual gear box is connected to the fixed base, a driving outer gear is rotationally connected to the manual gear box, and the driving outer gear and the outer gear ring are externally meshed to form a speed reduction transmission mechanism. The turntable seat is connected with the fixed base in a rotating way through the thrust bearing, so that the turntable seat rotates smoothly and saves labor. The rotation of the turntable seat is realized by operating the manual gear box and the reduction transmission mechanism, so that on one hand, the labor is saved, and on the other hand, the rotation speed of the turntable seat is slower after the speed is reduced, and the adjustment can be more accurate. In addition, the turntable seat can rotate by 360 degrees, and the adjustment range is larger.

As a further improved structural form, two longitudinal layering guide rails are symmetrically arranged on the turntable seat, a longitudinal sliding block is positioned between the two longitudinal layering guide rails and is in sliding fit with the two longitudinal layering guide rails, a rack part is arranged on the side surface of one longitudinal layering guide rail along the length direction of the side surface, a longitudinal adjusting gear is rotationally connected to the longitudinal sliding block, the longitudinal adjusting gear is meshed with the rack part of the longitudinal layering guide rail, and an exposed wrench position is arranged on a longitudinal adjusting gear shaft upwards.

As a further improved structural form, the two transverse layering guide rails are symmetrically arranged on the longitudinal sliding block, the transverse sliding block is positioned between the two transverse layering guide rails and is in sliding fit with the two transverse layering guide rails, a rack part is arranged on the side surface of one transverse layering guide rail along the length direction of the side surface of the transverse layering guide rail, a transverse adjusting gear is rotationally connected to the transverse sliding block, the transverse adjusting gear is meshed with the rack part of the transverse layering guide rail, and an exposed wrench position is arranged on the transverse adjusting gear shaft.

In the field of machine tools, a dovetail groove structure is adopted for a guide rail and a sliding block, a connecting screw rod is rotated on the guide rail, a handle is fixed at the end part of the screw rod, and the sliding block is driven to slide by rotating the handle. However, the dovetail groove type guide rail sliding block mechanism occupies a large space in length because of the screw and the handle. In addition, too short a torque of the handle results in a great effort in rotation. In the scheme, the longitudinal adjusting gear and the transverse adjusting gear serving as driving parts are respectively arranged on the longitudinal sliding block and the transverse sliding block, the space occupied by the guide rail sliding block mechanism on the length is small, and the structure is more compact. When the wrench is longitudinally or transversely adjusted, the wrench sleeve is used for screwing the wrench position of the longitudinal adjusting gear or the transverse adjusting gear, and particularly, the ratchet wrench with the long handle is adopted, so that the wrench is convenient and labor-saving, and can be taken down to be placed on one side when the adjustment is not needed, and excessive space is not occupied.

As a further improved structural form, the fixed base is provided with a circumferential T-shaped groove which is opened towards the turntable seat, the axle center surrounded by the circumferential T-shaped groove is coaxial with the rotation axle center of the turntable seat, a T-shaped bolt is assembled in the circumferential T-shaped groove, and the T-shaped bolt in the circumferential T-shaped groove penetrates through the turntable seat and then is in threaded fit with a nut, so that the turntable seat and the fixed base can be locked.

As a further improved structural form, the turntable seat is provided with a longitudinal T-shaped groove which is opened towards the longitudinal sliding block, the trend of the longitudinal T-shaped groove is parallel to the sliding direction of the longitudinal sliding block, a T-shaped bolt is assembled in the longitudinal T-shaped groove, and a nut is screwed in the T-shaped bolt in the longitudinal T-shaped groove after penetrating through the longitudinal sliding block and can lock the longitudinal sliding block and the turntable seat.

As a further improved structural form, the longitudinal sliding block is provided with a transverse T-shaped groove which is opened towards the transverse sliding block, the trend of the transverse T-shaped groove is parallel to the sliding direction of the transverse sliding block, a T-shaped bolt is assembled in the transverse T-shaped groove, and a nut is screwed in the T-shaped bolt in the transverse T-shaped groove after passing through the transverse sliding block and can lock the transverse sliding block and the longitudinal sliding block.

As a further improved structural form, the fixed base is provided with a circumferential scale coaxial with the rotation axis of the turntable seat, and the turntable seat is provided with a circumferential vernier at a position corresponding to the circumferential scale; or the turntable seat is provided with a circumferential scale coaxial with the rotation axis of the turntable seat, and the fixed base is provided with a circumferential vernier at a position corresponding to the circumferential scale.

As a further improved structural form, the longitudinal pressing bar guide rail is provided with a longitudinal scale, and the position of the longitudinal sliding block corresponding to the longitudinal scale is provided with a longitudinal cursor.

As a further improved structural form, the transverse pressing bar guide rail is provided with a transverse scale, and the position of the transverse sliding block corresponding to the transverse scale is provided with a transverse cursor.

As described above, in the dovetail groove type guide rail slide block mechanism, a scale is usually arranged on a handle, the adjustment distance of the slide block needs to be determined according to the scale on the handle, if the distance is large, the handle needs to be rotated for a plurality of turns, and the turns and specific scales need to be remembered, so that the adjustment is complicated. The utility model has the advantages that the reading is more visual, and the accurate adjustment is convenient. For example, zero positions are marked on the corresponding positions of the longitudinal scale and the longitudinal vernier, so that the longitudinal sliding block needs to move for a long distance, and the spanner can be rotated, and the scales on the longitudinal scale and the longitudinal vernier can be observed and moved for a long distance according to the scales.

Compared with the prior art, the utility model has the following main beneficial effects: the circumference and transverse and longitudinal adjusting mechanism can be conveniently assembled on or disassembled from the machine tool as a whole, and the clamp of the tool or the clamp of the workpiece is fixedly connected to the transverse sliding block, so that the circumference, transverse and longitudinal adjustment can be manually carried out, and the machine tool has good universality; after the adjustment, each movable part can be locked, so that the stability during processing is ensured; the turntable seat can rotate 360 degrees, so that the adjustment range is wider; the thrust bearing, the manual gear box and the speed reduction transmission mechanism are arranged to rotate the turntable seat more easily and smoothly, so that the adjustment is more accurate; the longitudinal sliding block and the transverse sliding block are respectively provided with a longitudinal adjusting gear and a transverse adjusting gear, so that the whole occupied space of the mechanism is smaller, and the structure is more compact; when the wrench is longitudinally or transversely adjusted, the wrench sleeve is used for screwing the wrench position of the longitudinal adjusting gear or the transverse adjusting gear, and the wrench can be taken down without occupying excessive space when the adjustment is not needed; the corresponding scales and cursors are arranged, the reading is more visual during adjustment, and accurate adjustment is convenient.

Drawings

Fig. 1 is a schematic view of a partially broken-away perspective exploded structure according to an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional structure of an embodiment of the present utility model.

Fig. 3 is a schematic perspective view of a turntable base and an external gear ring according to an embodiment of the present utility model.

Fig. 4 is a schematic view showing a structure of the present utility model mounted to a grinding machine.

Description of the embodiments

The utility model is further described below with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not to be construed as limiting the present patent. For the sake of brevity of description of the present embodiment, some parts of the drawings or description that are well known to those skilled in the art but not relevant to the main content of the present utility model will be omitted. In addition, some parts in the drawings may be omitted, enlarged or reduced for convenience of description, but not represent the size or the whole structure of the actual product.

The embodiment, as shown in fig. 1, 2 and 3, is a circumferential and transverse and longitudinal adjustment mechanism, which comprises a fixed base 11 and a turntable base 21. The bottom of the fixed base 11 is a plane, which is a connection reference surface of the fixed base 11, and is also a connection reference surface of the circumferential and horizontal adjustment mechanism. The whole of the fixed base 11 is basically cylindrical, the fixed base 11 radially and outwards extends out of the flange 111 from the bottom of the outer circle, and the flange 111 is used for penetrating bolts to fixedly connect the fixed base 11 with a machine tool. A thrust ball bearing 12 is coaxially fitted in the fixed base 11. The whole turntable seat 21 is basically disc-shaped, a circular positioning shaft 211 coaxially extends out of the lower surface of the turntable seat 21, and the positioning shaft 211 is coaxially matched and inserted into an inner hole of the thrust ball bearing 12, so that the fixed base 11 and the turntable seat 21 are rotatably connected through the thrust ball bearing 12. The axis of the fixed base 11, the axis of the turntable base 21 and the rotation axis of the turntable base 21 are all coaxial and perpendicular to the connection reference plane of the fixed base 11.

An outer gear ring 212 is fixedly connected coaxially below the turntable seat 21. The fixed base 11 is fixedly connected with a manual gear box after being cut off along the chord length, the manual gear box comprises a rectangular box-shaped box body 31 with an opening at the upper side and an opening at one side, and a box cover 32 is connected and capped on the opening at the upper side of the box body 31. An input driving external gear 33 and a secondary driving external gear 34 are respectively connected between the box body 31 and the box cover 32 in a rotating way through a shaft sleeve, and the secondary driving external gear 34 is exposed out of a side opening of the box body 31 and is meshed with the external gear ring 212. The transmission ratio of the input drive external gear 33 and the secondary drive external gear 34 is 1:2, and the transmission ratio of the secondary drive external gear 34 and the external gear ring 212 is 1:5, thereby forming a reduction gear mechanism. The input driving external gear 33 is axially provided with a wrench position exposed out of the case cover 32, so that the input driving external gear 33 can be rotated on the wrench position by using the wrench sleeve, and the turntable seat 21 can be driven to rotate.

The fixed base 11 is provided with a circle of circumferential T-shaped grooves 112 which are open towards the turntable seat 21, and the axle center surrounded by the circumferential T-shaped grooves 112 is coaxial with the axle center of the turntable seat 21. Four T-shaped bolts are assembled in the circumferential T-shaped groove 112, four bolt through holes are formed in the turntable seat 21, and nuts are screwed after the four T-shaped bolts in the circumferential T-shaped groove 112 respectively penetrate through the four bolt through holes in the turntable seat 21. When the turntable seat 21 needs to be rotated, the four nuts are unscrewed, then the input driving external gear 33 is screwed by a wrench, after the turntable seat 21 rotates in place, the turntable seat 21 and the fixed base 11 can be locked and fixed by screwing the four nuts, and thus no displacement is generated between the turntable seat 21 and the fixed base 11 after locking. And because the T-shaped bolt can be positioned at any position in the circumferential direction of the circumferential T-shaped groove 112, the turntable seat 21 can be adjusted and locked in 360 degrees in a rotating way, and the adjusting range is larger.

In order to facilitate the observation and accurately determine the rotation adjustment angle of the turntable seat 21, a circumferential scale 13 is coaxially arranged on the outer circumferential surface of the fixed base 11, and a circumferential cursor 22 is arranged on the outer circumferential surface of the turntable seat 21 at a position corresponding to the circumferential scale 13. In other embodiments, the outer circumferential surface of the turntable seat may be coaxially provided with a circumferential scale, and the outer circumferential surface of the fixed base may be provided with a circumferential cursor.

The turntable seat 21 is connected with two longitudinal layering guide rails 23 with L-shaped cross sections, the two longitudinal layering guide rails 23 are symmetrically arranged relative to a plane which passes through the diameter of the turntable seat 21 and is perpendicular to a connecting reference plane of the fixed base 11, a longitudinal T-shaped slide rail is formed between the two longitudinal layering guide rails 23 and the turntable seat 21, and a longitudinal slide block 41 with a T-shaped main body is slidably matched in the longitudinal T-shaped slide rail. The two longitudinal batten guide rails 23 enable the longitudinal sliding blocks 41 to always be attached to the turntable seat 21 when sliding along the longitudinal batten guide rails 23, and the sliding direction of the longitudinal sliding blocks 41 is parallel to the connecting reference surface of the fixed base 11.

One of the longitudinal bead rails 23 is provided with a rack portion 231 along the length direction of the longitudinal bead rail 23 on a side facing the longitudinal T-shaped slide. One end of the longitudinal slide 41 is fixedly connected with a longitudinal adjustment assembly, the longitudinal adjustment assembly comprises a box-shaped shell 51 with an opening at the upper side and an opening at one side, and a cover plate 52 is connected and capped at the opening at the upper side of the shell 51. A longitudinal adjusting gear 53 is rotatably connected between the housing 51 and the cover plate 52 through a shaft sleeve, the longitudinal adjusting gear 53 is exposed out of a side opening of the housing 51 and is meshed with the rack part 231 of the longitudinal layering guide rail 23, and an exposed wrench position is axially arranged on the longitudinal adjusting gear 53. The turntable seat 21 is provided with a longitudinal T-shaped groove 213 which is open towards the longitudinal sliding block 41, the longitudinal T-shaped groove 213 is positioned at the middle position of the two longitudinal layering guide rails 23, the trend of the longitudinal T-shaped groove 213 is parallel to the sliding direction of the longitudinal sliding block 41, and the longitudinal T-shaped groove 213 naturally passes through the center of the turntable seat 21. Two T-shaped bolts are assembled in the longitudinal T-shaped groove 213, two bolt through holes are respectively formed in the two ends, close to the two ends, of the longitudinal sliding block 41, and nuts are screwed after the two T-shaped bolts in the longitudinal T-shaped groove 213 respectively penetrate through the two bolt through holes of the longitudinal sliding block 41. When the longitudinal slide block 41 needs to be slid, the two nuts are unscrewed, then the longitudinal adjusting gear 53 is screwed by a wrench, after the longitudinal slide block 41 slides in place, the two nuts are screwed again, and the longitudinal slide block 41 and the turntable seat 21 can be locked and fixed, so that no displacement is generated between the longitudinal slide block 41 and the turntable seat 21 after locking.

In order to facilitate assembly and increase the strength of the parts, in this embodiment, an adapter plate 42 is fixedly connected to the longitudinal sliding block 41, and the adapter plate 42 and the longitudinal sliding block 41 may be regarded as an integral part, or may be directly integrally formed. In order to precisely determine the sliding adjustment distance of the longitudinal sliding block 41 and facilitate observation, a longitudinal scale 24 is arranged on the other side of the longitudinal layering guide rail 23 with a rack part 231, and a longitudinal cursor 43 is connected to the adapter plate 42 at a position corresponding to the longitudinal scale 24.

The adapter plate 42 is connected with two transverse pressing bar guide rails 44 with L-shaped cross sections, the two transverse pressing bar guide rails 44 are symmetrically arranged relative to the middle surface of the longitudinal sliding block 41 in the sliding direction, namely the middle surface of the longitudinal sliding block 41 in the length direction, a transverse T-shaped slide way is formed between the two transverse pressing bar guide rails 44 and the adapter plate 42, a transverse sliding block 61 with a T-shaped main body is slidably matched in the transverse T-shaped slide way, and the sliding direction of the transverse sliding block 61 is perpendicular to the sliding direction of the longitudinal sliding block 41. The two transverse batten guide rails 44 enable the transverse sliding blocks 61 to always be attached to the adapter plate 42 when sliding along the transverse batten guide rails 44, and the sliding direction of the transverse sliding blocks 61 is parallel to the connecting reference plane of the fixed base 11.

One of the lateral bead rails 44 is provided with a rack portion 441 along the length direction of the lateral bead rail 44 on a side facing the lateral T-shaped slide. One end of the transverse sliding block 61 is fixedly connected with a transverse adjusting component, the structure of the transverse adjusting component is the same as that of the longitudinal adjusting component, the longitudinal adjusting gear 53 is replaced by the transverse adjusting gear 71, and the transverse adjusting gear 71 and the longitudinal adjusting gear 53 can be designed into the same gears for the convenience of design and assembly, so that the modular design and assembly are facilitated, the time is saved, and the efficiency is improved. The lateral adjustment gear 71 is engaged with the rack portion 441 of the lateral trim rail 44, and an exposed wrench position is also provided in the axial direction of the lateral adjustment gear 71. The adapter plate 42 is provided with a transverse T-shaped groove 421 which is opened towards the transverse sliding block 61, the transverse T-shaped groove 421 is positioned at the middle position of the two transverse layering guide rails 44, and the trend of the transverse T-shaped groove 421 is parallel to the sliding direction of the transverse sliding block 61. Two T-shaped bolts are assembled in the transverse T-shaped groove 421, two bolt through holes are respectively formed in the two ends, close to the two ends, of the transverse sliding block 61, and nuts are screwed after the two T-shaped bolts in the transverse T-shaped groove 421 respectively penetrate through the two bolt through holes of the transverse sliding block 61. When the transverse sliding block 61 is required to slide, the two nuts are unscrewed, then the transverse adjusting gear 71 is screwed by a wrench, after the transverse sliding block 61 slides in place, the two nuts are screwed again, and the transverse sliding block 61, the adapter plate 42 and the longitudinal sliding block 41 can be locked and fixed, so that no displacement is generated between the transverse sliding block 61 and the adapter plate 42 after locking. In order to precisely determine the sliding adjustment distance of the transverse slider 61 and facilitate the observation, a transverse scale 45 is provided on the other side of the transverse bead rail 44 with a rack portion 441, and a transverse cursor 62 is connected to the transverse slider 61 at a position corresponding to the transverse scale 45.

Fig. 4 shows a specific example of the present embodiment, in which the circumferential and lateral adjustment mechanism is mounted on a rotary table 811 of a grinding machine 81, and the rotary flat grinding wheel grinding device 82 is mounted on a lateral slider 61 of the circumferential and lateral adjustment mechanism. The grinding machine 81 is mainly used for grinding workpieces with curved surfaces such as worms, and the like, after the circumference and transverse and longitudinal adjusting mechanism of the embodiment is installed, the circumference and transverse and longitudinal adjusting mechanism can be manually adjusted by 360 degrees in the circumferential direction, the transverse and longitudinal directions to drive the adjusting rotary type plane grinding wheel grinding device 82, and corresponding scales and cursors are used as references during adjustment, so that the reading is more visual, tool setting operation before machining can be greatly facilitated, and the positioning is more accurate. The present embodiment is not limited to use on a grinding machine, but may be mounted on a lathe for connecting a lathe tool fixing holder, on other lathes, or the like, for example.

The circumferential and transverse and longitudinal adjusting mechanism of the embodiment can be conveniently assembled on or disassembled from the machine tool as a whole, the clamp of the tool or the clamp of the workpiece and the like are fixedly connected on the transverse sliding block, and then the circumferential, transverse and longitudinal adjustment can be manually carried out, so that the device has good universality. After the adjustment, each moving part can be locked, so that the stability during processing is ensured. The turntable seat can rotate by 360 degrees, and the adjustment range is larger. The thrust ball bearing, the manual gear box and the speed reduction transmission mechanism are arranged to rotate the turntable seat more easily and smoothly, and the adjustment is more accurate. The longitudinal adjusting component and the transverse adjusting component are beneficial to forming modularized design and assembly, and the guide rail sliding block mechanism occupies smaller space in length and is more compact in structure. When the wrench is longitudinally or transversely adjusted, the wrench sleeve is used for screwing the wrench position of the longitudinal adjusting gear or the transverse adjusting gear, and the wrench can be taken down to be placed on one side when the adjustment is not needed, so that excessive space is not occupied.

The foregoing is only one embodiment of the present utility model, but the design concept of the present utility model is not limited thereto, and any insubstantial modifications made by using the design concept of the present utility model fall within the scope of the present utility model.

Claims (10)

1. The circumference and transverse and longitudinal adjusting mechanism is characterized by comprising a fixed base, wherein the bottom of the fixed base is provided with a connecting datum plane, the fixed base is rotationally connected with a turntable seat, the rotation axis of the turntable seat is vertical to the connecting datum plane of the fixed base, the turntable seat is slidingly connected with a longitudinal sliding block, the longitudinal sliding block is slidingly connected with a transverse sliding block, and the sliding direction of the longitudinal sliding block is vertical to the sliding direction of the transverse sliding block and is parallel to the connecting datum plane of the fixed base; the fixed base and the turntable seat, the turntable seat and the longitudinal sliding block, and the longitudinal sliding block and the transverse sliding block can be locked.

2. The circumferential and transverse and longitudinal adjusting mechanism according to claim 1, wherein the fixed base and the turntable seat are rotatably connected through a thrust bearing, the turntable seat is fixedly connected with an outer gear ring, the outer gear ring and the turntable seat are coaxial in rotation axis, the fixed base is connected with a manual gear box, the manual gear box is rotatably connected with a driving outer gear, and the driving outer gear and the outer gear ring are externally meshed and form a speed reduction transmission mechanism.

3. The circumferential and transverse and longitudinal adjustment mechanism according to claim 1, wherein the turntable seat is symmetrically provided with two longitudinal press bar guide rails, the longitudinal slide block is located between the two longitudinal press bar guide rails and is in sliding fit with the two longitudinal press bar guide rails, a rack part is arranged on the side surface of one longitudinal press bar guide rail along the length direction of the longitudinal slide block, the longitudinal slide block is rotationally connected with a longitudinal adjustment gear, the longitudinal adjustment gear is meshed with the rack part of the longitudinal press bar guide rail, and the longitudinal adjustment gear shaft is provided with an exposed wrench position upwards.

4. The circumferential and transverse and longitudinal adjustment mechanism according to claim 1, wherein the two transverse press bar guide rails are symmetrically arranged on the longitudinal slide block, the transverse slide block is located between the two transverse press bar guide rails and is in sliding fit with the two transverse press bar guide rails, a rack part is arranged on the side surface of one transverse press bar guide rail along the length direction of the side surface, a transverse adjustment gear is rotatably connected to the transverse slide block, the transverse adjustment gear is meshed with the rack part of the transverse press bar guide rail, and an exposed wrench position is arranged on the transverse adjustment gear shaft upwards.

5. The circumferential and transverse and longitudinal adjustment mechanism according to claim 1, wherein the fixed base is provided with a circumferential T-shaped groove opening towards the turntable base, an axis around which the circumferential T-shaped groove surrounds is coaxial with a rotation axis of the turntable base, a T-shaped bolt is assembled in the circumferential T-shaped groove, and a nut is screwed in the T-shaped bolt in the circumferential T-shaped groove after passing through the turntable base and can lock the turntable base and the fixed base.

6. The circumferential and transverse and longitudinal adjustment mechanism according to claim 1, wherein the turntable seat is provided with a longitudinal T-shaped groove opening towards the longitudinal sliding block, the direction of the longitudinal T-shaped groove is parallel to the sliding direction of the longitudinal sliding block, a T-shaped bolt is assembled in the longitudinal T-shaped groove, and a nut is screwed in the T-shaped bolt in the longitudinal T-shaped groove after passing through the longitudinal sliding block and can lock the longitudinal sliding block and the turntable seat.

7. The circumferential and transverse and longitudinal adjustment mechanism according to claim 1, wherein the longitudinal slide block is provided with a transverse T-shaped groove which is open towards the transverse slide block, the direction of the transverse T-shaped groove is parallel to the sliding direction of the transverse slide block, a T-shaped bolt is assembled in the transverse T-shaped groove, and a nut is screwed in the T-shaped bolt in the transverse T-shaped groove after passing through the transverse slide block and can lock the transverse slide block and the longitudinal slide block.

8. The circumferential and transverse and longitudinal adjustment mechanism according to claim 1, wherein the fixed base is provided with a circumferential scale coaxial with the rotation axis of the turntable base, and the turntable base is provided with a circumferential vernier at a position corresponding to the circumferential scale; or the turntable seat is provided with a circumferential scale coaxial with the rotation axis of the turntable seat, and the fixed base is provided with a circumferential vernier at a position corresponding to the circumferential scale.

9. A circumferential and transverse and longitudinal adjustment mechanism according to claim 3, wherein the longitudinal presser bar guide rail is provided with a longitudinal scale, and the longitudinal slider is provided with a longitudinal cursor at a position corresponding to the longitudinal scale.

10. The circumferential and longitudinal adjustment mechanism according to claim 4, wherein the transverse presser bar guide rail is provided with a transverse scale, and the transverse slider is provided with a transverse cursor at a position corresponding to the transverse scale.