positioning device

Abstract

The present application relates to a positioning device, which comprises a base including a plurality of through holes and a sliding groove, a clamping assembly arranged in the sliding groove and including a first clamping block and a second clamping block, and an adjusting assembly including a first driving rod, a second driving rod and at least one rotating rod, the first driving rod including a first threaded section and a first umbrella-shaped gear, the second driving rod including a second threaded section and a second umbrella-shaped gear, the first clamping block and the second clamping block being arranged on the first threaded section and the second threaded section respectively, and each of the rotating rods including a third umbrella-shaped gear, the third umbrella-shaped gear being engaged with the first umbrella-shaped gear and the second umbrella-shaped gear respectively.

Description

Technical Field

[0001] The present invention relates in particular to a positioning device. Background Technology

[0002] Existing positioning devices, such as Taiwan Patent No. I720854, use a guide post screwed onto the guide post channel. The first guide surface of the guide post, which is conical in shape, moves axially to radially push against a plurality of steel balls, thereby driving the first and second locking components to lock the first and second inserts.

[0003] However, in existing positioning devices, the guide post pushes against the plurality of steel balls and the plurality of steel balls push against the first and second locking components in a point-to-point contact manner. During the pushing process, uneven force is easily caused and the first and second locking components are prone to wobble, which makes it impossible to move smoothly and to securely lock the first and second inserts.

[0004] Therefore, it is necessary to provide a novel and progressive positioning device to solve the above-mentioned problems. Summary of the Invention

[0005] The main objective of this invention is to provide a positioning device that can stably drive a first clamping block and a second clamping block to move relative to each other and distribute the force evenly.

[0006] To achieve the above objectives, the present invention provides a positioning device, comprising: a base including a plurality of through holes and a groove extending along a first direction; a clamping assembly disposed in the groove, the clamping assembly including a first clamping block and a second clamping block, the first clamping block and the second clamping block being respectively movable relative to each other along the first direction between a locked position and a released position and moving relative to at least one of the through holes; and an adjusting assembly including a first driving rod, a second driving rod and at least one rotating rod, the at least one rotating rod being rotatable. The first drive rod and the second drive rod are rotatably mounted on the base. The first drive rod includes a first threaded section and a first bevel gear, and the second drive rod includes a second threaded section and a second bevel gear. The first clamping block and the second clamping block are respectively disposed on the first threaded section and the second threaded section. Each rotating rod includes a third bevel gear, which meshes with the first bevel gear and the second bevel gear to enable the rotating rod to drive the first drive rod and the second bevel gear. The drive rod rotates; wherein each of the through holes extends along an axial direction, the axial direction being transverse to the first direction and the second direction, and the plurality of through holes are at least partially located at the corners of the slide groove, each of the through holes communicating with the slide groove; wherein the first clamping block includes at least one first locking portion, and the second clamping block includes at least one second locking portion; when the first clamping block and the second clamping block are respectively in the locked position, each of the first locking portions and each of the second locking portions protrudes into one of the through holes and is engaged in a groove of a bolt located in the through hole; when the first... When the clamping block and the second clamping block are in the release position, each of the first locking portions and each of the second locking portions are respectively located in the groove for disengaging from the bolt; wherein, the first clamping block includes two first locking portions, and the first clamping block is provided with a first locking portion at each of the two opposite corners on the side away from the first bevel gear and on the second direction; the second clamping block includes two second locking portions, and the second clamping block is provided with a second locking portion at each of the two opposite corners on the side away from the second bevel gear and on the second direction.

[0007] The first bevel gear and the second bevel gear are spaced apart and opposite to each other in the first direction, and the third bevel gear of the at least one rotating rod meshes between the first bevel gear and the second bevel gear.

[0008] The adjustment assembly includes a plurality of the rotating rods, each of which has a third bevel gear located between the first bevel gear and the second bevel gear, and respectively meshing with the first bevel gear and the second bevel gear at different points.

[0009] Each of the first latching part and each of the second latching parts is provided with an arc-shaped concave surface facing one of the through holes.

[0010] Each of the first and second locking portions is wedge-shaped and each further includes a first inclined surface and a second inclined surface disposed on opposite sides of the axial direction. The concave surface is disposed between the first and second inclined surfaces, and the first and second inclined surfaces gradually approach each other in the direction of the concave surface.

[0011] The positioning device further includes a plurality of positioning rings, which are respectively disposed in the plurality of through holes. A through groove is provided on one circumferential wall of each positioning ring, which connects the through hole and the sliding groove. Each first locking part and each second locking part can pass through the through groove of one of the positioning rings.

[0012] The base further includes a first shaft hole and a stop. The first shaft hole communicates with the slide groove and an outside. The adjustment assembly further includes a shaft that passes through the first shaft hole and at least one of the first drive rod and the second drive rod. The first drive rod and at least one of the second drive rod are rotatable relative to the shaft. The stop covers the first shaft hole and is located between the outside and the slide groove.

[0013] The positioning device further includes at least one limiting component, and the base further includes at least one receiving hole extending along the second direction. Each receiving hole communicates with the slide groove and an outside. The second direction is transverse to the first direction. The at least one rotating rod is rotatably disposed in the at least one receiving hole. Each limiting component includes a limiting member and a gasket. The at least one limiting member is detachably disposed at one end of the at least one receiving hole away from the slide groove. The at least one rotating rod can abut against the at least one limiting member in the second direction. The gasket abuts against the limiting member and the rotating rod.

[0014] The first threaded segment and the second threaded segment have opposite helical directions; the first bevel gear and the second bevel gear are spaced apart and opposite to each other in the first direction, and the third bevel gear of the at least one rotating rod meshes between the first bevel gear and the second bevel gear; the adjusting assembly includes a plurality of rotating rods, the third bevel gear of each rotating rod is located between the first bevel gear and the second bevel gear, and respectively meshes with the opposite positions of the first bevel gear and the second bevel gear; at least two rotating rods are coaxially arranged, the first drive rod and the second drive rod are coaxially arranged, and the first drive rod and the... The second drive rod is arranged in the first direction, and at least two rotating rods are arranged laterally in the first direction; the positioning device further includes a plurality of positioning rings, which are respectively disposed in the plurality of through holes, and a through groove is provided on the peripheral wall of one ring of each positioning ring, the through groove connecting the through hole and the sliding groove, and each of the first locking parts and each of the second locking parts can pass through the through groove of one of the positioning rings; the base further includes a first shaft hole and a stop, the first shaft hole connecting the sliding groove and an outside, and the adjustment assembly further includes a shaft, which passes through the first shaft hole and the first drive rod. With at least one of the second drive rods, the first drive rod and at least one of the second drive rods are rotatable relative to the shaft. The stop covers the first shaft hole and is located between the outside and the slide groove. The base further includes a second shaft hole, which is coaxially arranged with the first shaft hole and respectively located on opposite sides of the slide groove. The shaft passes through the first drive rod, the second drive rod, and the second shaft hole. The positioning device further includes at least one limiting component. The base further includes at least one receiving hole extending along the second direction, each receiving hole communicating with the slide groove and an outside. The second direction is transverse to the first direction. At least one rotating rod is rotatably disposed in the at least one receiving hole. Each limiting component includes a limiting member and a gasket. The at least one limiting member is detachably disposed at one end of the at least one receiving hole away from the slide groove. The at least one rotating rod can abut against the at least one limiting member in the second direction. The gasket abuts between the limiting member and the rotating rod. The limiting member is a C-shaped buckle, and the gasket is a washer. Each rotating rod has a connecting portion at one end corresponding to the washer, and the connecting portion is used for a tool to engage. The base includes two receiving holes, which are spaced apart in the second direction. Each rotating rod is disposed in one of the receiving holes.

[0015] The beneficial effects of the present invention are as follows: The positioning device obtained by the present invention can stably drive a first clamping block and a second clamping block to move relative to each other and be subjected to even force. Attached Figure Description

[0016] Figure 1 This is a perspective view of a preferred embodiment of the present invention.

[0017] Figure 2 This is a perspective view of a workpiece combined with a preferred embodiment of the present invention.

[0018] Figure 3 This is an exploded view of a preferred embodiment of the present invention.

[0019] Figure 4 This is a cross-sectional view of a preferred embodiment of the present invention.

[0020] Figure 4A for Figure 4 A magnified view of a portion of the image.

[0021] Figure 5 This is an exploded cross-sectional view of a preferred embodiment of the present invention.

[0022] Figure 6 This is an exploded cross-sectional view of a first clamping block and a second clamping block in a release position, according to a preferred embodiment of the present invention.

[0023] Figure 7 This is an exploded cross-sectional view of a first clamping block and a second clamping block in a locked position, according to a preferred embodiment of the present invention.

[0024] Figure 8 This is a perspective view of a first drive rod according to a preferred embodiment of the present invention.

[0025] Figure 9 This is a perspective view of a rotating rod according to a preferred embodiment of the present invention.

[0026] 10: Base

[0027] 11: Perforation

[0028] 12: Slide

[0029] 13: First shaft hole

[0030] 14: Stop

[0031] 15: Reception Hole

[0032] 16: Second shaft hole

[0033] 20: Clamping assembly

[0034] 21: First clamping block

[0035] 211: First Card Control Section

[0036] 22: Second clamping block

[0037] 221: Second Card Control Section

[0038] 23: Concave surface

[0039] 24: First inclined plane

[0040] 25:Second slope

[0041] 30: Adjust components

[0042] 31: First drive lever

[0043] 311: First threaded section

[0044] 312: First bevel gear

[0045] 313: Bottom

[0046] 314: First tooth

[0047] 315: Recessed space

[0048] 316: First conical surface

[0049] 317: Second cone surface

[0050] 318: Sloping surface

[0051] 319: External tooth surface

[0052] 32: Second drive lever

[0053] 321: Second threaded section

[0054] 322: Second bevel gear

[0055] 33: Rotating rod

[0056] 331: Third bevel gear

[0057] 332: Joint

[0058] 34: Shaft

[0059] 35: Second tooth

[0060] 351: Helical tooth surface

[0061] 352: Supporting surface

[0062] 353: Extended surface

[0063] 354: End face

[0064] 40: Bolt rod

[0065] 41: Groove

[0066] 42: Bottom ring circumference

[0067] 43: Sloping wall

[0068] 50: Positioning ring

[0069] 51: Through slot

[0070] 52: Circumferential wall

[0071] 60: Limiting component

[0072] 61: Limiting component

[0073] 62: Gasket

[0074] 70: Clamping the workpiece

[0075] L1: First direction

[0076] L2: Second direction

[0077] A1: First central axis

[0078] A2: Second Central Axis Detailed Implementation

[0079] The following examples illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention. The use of "a" or "at least one" before the terms mentioned herein is not a limitation on the quantity, and may also be "plural" depending on the requirements. Such variations in quantity are also within the scope of protection, and are therefore stated in advance.

[0080] Please refer to Figures 1 to 9 and Figure 4A This illustrates a preferred embodiment of the present invention, in which the positioning device includes a base 10, a clamping assembly 20, and an adjustment assembly 30.

[0081] The base 10 includes a plurality of through holes 11 and a groove 12 extending along a first direction L1; the clamping assembly 20 is disposed in the groove 12, and the clamping assembly 20 includes a first clamping block 21 and a second clamping block 22, the first clamping block 21 and the second clamping block 22 being respectively movable relative to each other along the first direction L1 between a locked position and a released position and relative to at least one of the through holes 11; the adjusting assembly 30 includes a first driving rod 31, a second driving rod 32 and at least one rotating rod 33, the at least one rotating rod 33 being rotatably disposed on the base 10, the first driving rod 31 and the second driving rod 32 being respectively The first drive rod 31, rotatably mounted on the slide groove 12, includes a first threaded section 311 and a first bevel gear 312. The second drive rod 32 includes a second threaded section 321 and a second bevel gear 322. The first clamping block 21 and the second clamping block 22 are respectively screwed onto the first threaded section 311 and the second threaded section 321. Each rotating rod 33 includes a third bevel gear 331, which meshes with the first bevel gear 312 and the second bevel gear 322, enabling the rotating rod 33 to drive the first drive rod 31 and the second drive rod 32 to rotate. In this embodiment, the helical directions of the first threaded section 311 and the second threaded section 321 are opposite. This provides a quick and repetitive way to assemble and disassemble positioning fixtures or clamp workpieces 70; and the first drive rod 31 and the first clamping block 21, and the second drive rod 32 and the second clamping block 22 are respectively screwed together to provide surface-to-surface contact, so as to drive the first clamping block 21 and the second clamping block 22 to move and position relatively stably with even force. In addition, the gear ratio between the third bevel gear 331 and the first bevel gear 312 and the second bevel gear 322 can be changed according to requirements, such as output torque, driving force, displacement speed of the first clamping block 21 and the second clamping block 22, or load capacity of the first drive rod 31 and the second drive rod 32, or at least one of the first bevel gear 312, the second bevel gear 322 and the third bevel gear 331 with different shapes, to improve the versatility of use.

[0082] Each of the through holes 11 extends along an axial direction, which is transverse to the first direction L1 and the second direction L2. The plurality of through holes 11 are at least partially located at the corners of the slide groove 12. Each of the through holes 11 communicates with the slide groove 12. The first clamping block 21 includes at least one first locking portion 211, and the second clamping block 22 includes at least one second locking portion 221. When the first clamping block 21 and the second clamping block 22 are in the locked position, each of the first locking portions 211 and each of the second locking portions 221 protrudes into one of the through holes 11 and is engaged in a groove 41 of a bolt 40 located in the through hole 11. When the first clamping block 21 and the second clamping block 22 are in the released position, each of the first locking portions 211 and each of the second locking portions 221 are engaged in the groove 41 for disengaging from the bolt 40. In this embodiment, the first clamping block 21 includes two first locking portions 211, each located at one of two opposite corners facing away from the first bevel gear 312 and transversely along the first direction L1. The second clamping block 22 includes two second locking portions 221, each located at one of two opposite corners facing away from the second bevel gear 322 and transversely along the first direction L1. Thus, each of the first locking portions 211 and each of the second locking portions 221 provides a force obliquely towards the first direction L1 to engage with the groove 41 of the bolt 40, thereby resisting the reaction force towards the first direction L1 for stable positioning. Furthermore, the first clamping block 21 and the second clamping block 22 are used to secure a plurality of bolts 40.

[0083] Each of the first latching part 211 and each of the second latching parts 221 is provided with an arcuate concave surface 23 facing one of the through holes 11. Each of the first locking portion 211 and each of the second locking portions 221 is wedge-shaped and each further includes a first inclined surface 24 and a second inclined surface 25 disposed on opposite sides of the axial direction. The arc concave surface 23 is disposed between the first inclined surface 24 and the second inclined surface 25, and the first inclined surface 24 and the second inclined surface 25 gradually approach each other in the direction of the arc concave surface 23. In this embodiment, the first inclined surface 24 and the second inclined surface 25 are respectively arc concave. Specifically, the first inclined surface 24 and the second inclined surface 25 can abut against the two opposite inclined walls 43 of the groove 41 in the axial direction, and the arc concave surface 23 can correspond to (or abut against) a bottom ring circumferential surface 42 of the groove 41. In this way, it can be tightly fitted with bolts 40 of different sizes. For example, the bolt has a groove on the bottom ring circumferential surface with different depths, heights or curvatures.

[0084] The first bevel gear 312 and the second bevel gear 322 are spaced apart and opposite to each other in the first direction L1. The third bevel gear 331 of the at least one rotating rod 33 meshes between the first bevel gear 312 and the second bevel gear 322. Preferably, the adjustment assembly 30 includes a plurality of rotating rods 33, and the third bevel gear 331 of each rotating rod 33 is located between the first bevel gear 312 and the second bevel gear 322, and respectively meshes with the first bevel gear 312 and the second bevel gear 322 at different locations (opposite locations in this embodiment). At least two rotating rods 33 are coaxially arranged, the first drive rod 31 and the second drive rod 32 are coaxially arranged, the first drive rod 31 and the second drive rod 32 are arranged in the first direction L1, and at least two rotating rods 33 are arranged laterally in the first direction L1. In this way, it can be operated in multiple directions for easy adjustment, and the first bevel gear 312 and the second bevel gear 322 can rotate synchronously and stably without being prone to relative wobbling.

[0085] The base 10 further includes a first shaft hole 13 and a stop 14. The first shaft hole 13 communicates with the slide groove 12 and an external environment. The adjustment assembly 30 further includes a shaft 34, which passes through the first shaft hole 13 and at least one of the first drive rod 31 and the second drive rod 32. At least one of the first drive rod 31 and the second drive rod 32 is rotatable relative to the shaft 34. The stop 14 covers the first shaft hole 13 and is located between the external environment and the slide groove 12. In this embodiment, the stop 14 is a locking screw locked in the first shaft hole 13, which facilitates disassembly and assembly to remove and install the shaft 34. Preferably, the base 10 further includes a second shaft hole 16, which is coaxially arranged with the first shaft hole 13 and respectively located on opposite sides of the slide groove 12. The shaft 34 passes through the first drive rod 31, the second drive rod 32 and the second shaft hole 16, so that the first drive rod 31 and the second drive rod 32 are coaxially arranged and rotate stably.

[0086] The positioning device further includes at least one limiting component 60, and the base 10 further includes at least one receiving hole 15 extending along the second direction L2. Each receiving hole 15 communicates with the slide groove 12 and an outside. The second direction L2 is transverse to the first direction L1. At least one rotating rod 33 is rotatably disposed in the at least one receiving hole 15. Each limiting component 60 includes a limiting member 61 and a gasket 62. The at least one limiting member 61 is detachably disposed at one end of the at least one receiving hole 15 away from the slide groove 12. The at least one rotating rod 33 can be engaged with the at least one limiting member 61 in the second direction L2. The gasket 62 abuts between the limiting member 61 and the rotating rod 33. In this embodiment, the limiting member 61 is a C-shaped buckle, the gasket 62 is a washer, and each rotating rod 33 has a connecting portion 332 at one end corresponding to the washer. The connecting portion 332 is for a tool to engage. In this embodiment, the connecting portion 332 is a polygonal hole, further illustrating that the tool can directly engage with the polygonal hole through the C-shaped buckle and the washer. Furthermore, the base 10 includes two receiving holes 15, which are spaced apart in the second direction L2. Each rotating rod 33 is disposed in one of the receiving holes 15. Therefore, it can prevent each rotating rod 33 from moving away from the third bevel gear 331 in the second direction L2, and prevent each rotating rod 33 from disengaging from the first drive rod 31 and the second drive rod 32. The C-shaped buckle can elastically shrink or expand to facilitate disassembly and assembly.

[0087] In this embodiment, the outer diameter of the first bevel gear 312 is larger than the outer diameter of the first threaded segment 311. The first bevel gear 312 and the first threaded segment 311 are arranged along a first central axis A1. The first bevel gear 312 includes a bottom 313 and a plurality of first teeth 314 on the first central axis A1. The plurality of first teeth 314 are arranged around the first central axis A1 around the bottom 313 and axially protrude in a direction away from the bottom 313. The plurality of first teeth 314 and the bottom 313 define a recessed space 315. Each first tooth 314 includes a first conical surface 316, a second conical surface 317, two inclined surfaces 318, and... An external toothed surface 319 is provided. The first conical surface 316 tapers radially toward the recessed space 315, and the second conical surface 317 tapers axially away from the bottom 313. The first conical surface 316 is transverse to the second conical surface 317. The external toothed surface 319 and the second conical surface 317 are located on opposite sides in the radial direction. The external toothed surface 319 is located on the side away from the recessed space 315 in the radial direction. The external toothed surface 319 tapers axially away from the bottom 313. Two inclined abutment surfaces 318 are located on opposite sides in the circumferential direction and are respectively located between the first conical surface 316, the second conical surface 317 and the external toothed surface 319. The structure of the second drive rod 32 is the same as that of the first drive rod 31. Each rotating rod 33 defines a second central axis A2. Each rotating rod 33 includes a plurality of second teeth 35, which are arranged around the second central axis A2. Each second tooth 35 includes a helical tooth surface 351, two abutting surfaces 352, an extension surface 353, and a radially extending end face 354. The helical tooth surface 351 is disposed between the end face 354 and the extension surface 353. The extension surface 353 gradually tapers towards the helical tooth surface 351 in the axial direction. The helical tooth surface 351 is a quadrilateral. The helical tooth surface 351 gradually tapers from the extension surface 353 towards the end face 354 and gradually approaches the second central axis A2. The two abutting surfaces 352 are disposed on opposite sides in the circumferential direction and are respectively connected between the extension surface 353, the helical tooth surface 351, and the end face 354. One of the abutting surfaces 352 can abut against one of the inclined abutting surfaces 318 of one of the first teeth 314 in the circumferential direction; thereby, each of the rotating rods 33 can smoothly drive at least one of the first drive rod 31 and the second drive rod 32 to rotate. The first central axis A1 intersects the second central axis A2. In addition, in other embodiments, each of the first teeth and each of the second teeth can be V-shaped or trapezoidal in shape.

[0088] The relatively distant ends of the first drive rod 31 and the second drive rod 32 abut against the peripheral wall of the slide groove 12, thereby preventing the first drive rod 31 and the second drive rod 32 from moving relatively apart when driven to rotate by the at least one rotating rod 33.

[0089] The positioning device further includes a plurality of positioning rings 50, which are respectively disposed in the plurality of through holes 11. A groove 51 is provided through a circumferential wall 52 of each positioning ring 50. The groove 51 connects the through hole 11 and the slide groove 12. Each first locking part 211 and each second locking part 221 can pass through the groove 51 of one of the positioning rings 50. Specifically, the hardness of each positioning ring 50 is relatively greater than that of each through hole 11. It can be made of metal or plastic to avoid wear of the plurality of through holes 11. In addition, each positioning ring 50 is detachably disposed in one of the through holes 11 for replacement.

[0090] In use, rotating at least one rotating rod 33 synchronously rotates the first driving rod 31 and the second driving rod 32 to drive the first clamping block 21 and the second clamping block 22 to move relative to each other, thereby locking at least one bolt 40 for positioning or releasing at least one bolt 40.

Claims

1. A positioning device, characterized in that: include: A base, including a plurality of perforations and a groove extending along a first direction; A clamping assembly, disposed in the slide groove, includes a first clamping block and a second clamping block, the first clamping block and the second clamping block being respectively movable relative to each other along the first direction between a locked position and a released position, and moving relative to at least one of the through holes; and An adjustment assembly includes a first drive rod, a second drive rod, and at least one rotating rod. The at least one rotating rod is rotatably disposed on the base. The first drive rod and the second drive rod are rotatably disposed on the slide groove. The first drive rod includes a first threaded segment and a first bevel gear. The second drive rod includes a second threaded segment and a second bevel gear. The first clamping block and the second clamping block are respectively disposed on the first threaded segment and the second threaded segment. Each rotating rod includes a third bevel gear. The third bevel gear meshes with the first bevel gear and the second bevel gear respectively, so that the rotating rod can drive the first drive rod and the second drive rod to rotate. Each of the perforations extends along an axial direction, which is transverse to the first direction, and the first direction is transverse to a second direction. The plurality of perforations are at least partially located at the corners of the slide groove, and each of the perforations communicates with the slide groove. The first clamping block includes at least one first locking portion, and the second clamping block includes at least one second locking portion. When the first clamping block and the second clamping block are in the locked position, each of the first locking portions and each of the second locking portions protrudes into one of the through holes and is engaged in a groove of a bolt located in the through hole. When the first clamping block and the second clamping block are in the released position, each of the first locking portions and each of the second locking portions is in the groove for disengaging from the bolt. The first clamping block includes two first locking portions, each of which is provided at a corner on the side away from the first bevel gear and on opposite sides in the second direction; the second clamping block includes two second locking portions, each of which is provided at a corner on the side away from the second bevel gear and on opposite sides in the second direction.

2. The positioning device as described in claim 1, characterized in that: The first bevel gear and the second bevel gear are spaced apart and opposite to each other in the first direction, and the third bevel gear of the at least one rotating rod meshes between the first bevel gear and the second bevel gear.

3. The positioning device as described in claim 2, characterized in that: The adjustment assembly includes a plurality of the rotating rods, each of which has a third bevel gear located between the first bevel gear and the second bevel gear, and respectively meshing with the first bevel gear and the second bevel gear at different points.

4. The positioning device as described in claim 1, characterized in that: Each of the first latching part and each of the second latching parts is provided with an arc-shaped concave surface facing one of the through holes.

5. The positioning device as described in claim 4, characterized in that: Each of the first and second locking portions is wedge-shaped and each further includes a first inclined surface and a second inclined surface disposed on opposite sides of the axial direction. The concave surface is disposed between the first and second inclined surfaces, and the first and second inclined surfaces gradually approach each other in the direction of the concave surface.

6. The positioning device as described in claim 1, characterized in that: It also includes a plurality of positioning rings, which are respectively disposed in the plurality of through holes. A through groove is provided on one circumferential wall of each positioning ring, which connects the through hole and the sliding groove. Each first locking part and each second locking part can pass through the through groove of one of the positioning rings.

7. The positioning device as described in claim 1, characterized in that: The base further includes a first shaft hole and a stop. The first shaft hole communicates with the slide groove and an outside. The adjustment assembly further includes a shaft that passes through the first shaft hole and at least one of the first drive rod and the second drive rod. The first drive rod and at least one of the second drive rod are rotatable relative to the shaft. The stop covers the first shaft hole and is located between the outside and the slide groove.

8. The positioning device as described in claim 1, characterized in that: It also includes at least one limiting component, and the base further includes at least one receiving hole extending along the second direction. Each receiving hole communicates with the slide groove and an outside. The at least one rotating rod is rotatably disposed in the at least one receiving hole. Each limiting component includes a limiting member and a gasket. The at least one limiting member is detachably disposed at an end of the at least one receiving hole away from the slide groove. The at least one rotating rod can abut against the at least one limiting member in the second direction. The gasket abuts between the limiting member and the rotating rod.

9. The positioning device as described in claim 4, characterized in that: The first threaded segment and the second threaded segment have opposite helical directions; the first bevel gear and the second bevel gear are spaced apart and opposite to each other in the first direction, and the third bevel gear of the at least one rotating rod meshes between the first bevel gear and the second bevel gear; the adjusting assembly includes a plurality of rotating rods, the third bevel gear of each rotating rod is located between the first bevel gear and the second bevel gear, and respectively meshes with the opposite positions of the first bevel gear and the second bevel gear; at least two rotating rods are coaxially arranged, the first drive rod and the second drive rod are coaxially arranged, and the first drive rod... The moving rod and the second driving rod are arranged in the first direction, and at least two rotating rods are arranged transversely in the first direction; the positioning device further includes a plurality of positioning rings, which are respectively disposed in the plurality of through holes, and a through groove is provided on one circumferential wall of each positioning ring, which connects the through hole and the sliding groove. Each first locking part and each second locking part can pass through the through groove of one of the positioning rings; the base further includes a first shaft hole and a stop, the first shaft hole connecting the sliding groove and an outside; the adjusting assembly further includes a shaft that passes through the first shaft hole. The base includes at least one of the first drive rod and the second drive rod, both of which are rotatable relative to the shaft. The stop covers the first shaft hole and is located between the outside and the slide groove. The base further includes a second shaft hole, which is coaxially arranged with the first shaft hole and respectively located on opposite sides of the slide groove. The shaft passes through the first drive rod, the second drive rod, and the second shaft hole. The positioning device further includes at least one limiting component. The base further includes at least one receiving hole extending along the second direction, each receiving hole communicating with the slide groove and an outside. The movable rod is rotatably disposed in the at least one receiving hole. Each limiting component includes a limiting member and a gasket. The at least one limiting member is detachably disposed at one end of the at least one receiving hole away from the slide groove. The at least one rotating rod can abut against the at least one limiting member in the second direction. The gasket abuts between the limiting member and the rotating rod. The limiting member is a C-shaped buckle, and the gasket is a washer. Each rotating rod has a connecting portion at one end corresponding to the washer, and the connecting portion is for a tool to engage. The base includes two receiving holes, which are spaced apart in the second direction. Each rotating rod is disposed in one of the receiving holes.

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