Positioning tool and punching device for rubber cylinder part

Abstract

The utility model provides a positioning tool for a rubber barrel piece. The positioning tool comprises a base, a pushing piece and a rotation limiting assembly. The base is used for being mounted on a drilling device and located under a drill bit, and mounting holes allowing the front ends of two profiles to be inserted therein are formed in the base. The pushing piece is slidably arranged on the base in the axial direction of the mounting hole, is suitable for abutting against the rear ends of the two profiles and is in transmission connection with a linear driving component; the rotation limiting assembly is arranged on the base and used for being connected with the two sectional materials so as to limit rotation of the two sectional materials, and the groove bottom of each fixing groove can face the vertical direction. The utility model further provides a punching device which comprises the positioning tool for the rubber cylinder part, and the punching device and the positioning tool have the same beneficial effects. According to the positioning tool for the rubber cylinder piece, punching operation of two profiles can be conducted at the same time at a time, due to the fact that the punching positions of the two profiles are uniform, after the two profiles are symmetrically attached, corresponding positioning holes can be accurately attached, and the product quality of the rubber cylinder piece is improved.

Description

Technical Field

[0001] This application belongs to the technical field of rubber product tooling, and more specifically, it relates to a positioning tooling and a punching device for rubber cylinder parts. Background Art

[0002] The rubber cylinder part is composed of two identical profiles symmetrically fitted together. As Figure 1 shown, the rubber cylinder part 6 has a frustum-shaped structure with a hollow interior and a reduced diameter along the axial direction. Generally, the small-diameter end of the rubber cylinder part 6 is called the front end, and the large-diameter end is called the rear end. Moreover, each profile 61 has a plurality of fixing grooves 611 on the side facing away from the fitting surface 63; the bottom of each fixing groove 611 is parallel to the fitting surface 63, and the bottom of each fixing groove 611 has a plurality of positioning holes 612. As Figure 2 shown, when assembling the rubber cylinder part 6, it is necessary to first symmetrically fit the two profiles 61, and then insert fixing bolts 62 into the corresponding positioning holes 612 for fixation. That is to say, before the profiles 61 are assembled, a punching process needs to be carried out first.

[0003] In the existing punching process, workers often place multiple profiles on the punching device one by one for punching operations.

[0004] The inventor found that due to the error in the placement position of manual operation, it is difficult to keep the punching position accurate. As a result, after the two profiles are symmetrically fitted, the corresponding positioning holes cannot be accurately aligned, reducing the product quality of the rubber cylinder part. Utility Model Content

[0005] The purpose of this application is to provide a positioning tooling and a punching device for rubber cylinder parts, so as to solve the technical problem in the prior art that when punching positioning holes for the profiles required for assembling rubber cylinder parts, the position deviation of the corresponding positioning holes on the two profiles is relatively large, thereby reducing the quality of the rubber cylinder part.

[0006] To achieve the above purpose, the technical solution adopted in this application is: to provide a positioning tooling for rubber cylinder parts. The rubber cylinder part includes two symmetrically fitted profiles, and each profile has a plurality of fixing grooves on the side facing away from the fitting surface; wherein, the bottom of each fixing groove is parallel to the fitting surface and is used to connect with the drill bit. The positioning tooling is characterized in that it includes:

[0007] A base, which is used to be installed on the drilling device, is located directly below the drill bit, and has a mounting hole that penetrates horizontally and is suitable for inserting the front ends of the two profiles;

[0008] A pushing member, which is slidably arranged on the base along the axial direction of the mounting hole, is suitable for abutting against the rear ends of the two profiles, and is drivingly connected with a linear driving member; and

[0009] A rotation-limiting component is arranged on the base and is used to connect with the two profiles to limit the rotation of the two profiles and make the bottom of each fixing groove face the up and down directions.

[0010] Preferably, the rotation-limiting component includes:

[0011] Two limiting plates are symmetrically arranged on the upper and lower sides of the mounting hole and are both slidably connected with the base in the up and down direction; there is a distance-adjusting structure between the two limiting plates; each limiting plate is provided with a plurality of clamping parts adapted to be respectively and correspondingly embedded in a plurality of the fixing grooves, and each clamping part is provided with a plurality of avoiding holes penetrating in the up and down direction and corresponding to a plurality of positioning holes to be machined one by one.

[0012] Wherein, when the front ends of the two profiles are inserted into the mounting hole and the pushing member abuts against the rear ends of the two profiles, the distance-adjusting structure is adapted to drive the two limiting plates to move towards each other so that each clamping part is embedded in the corresponding fixing groove.

[0013] Preferably, the distance-adjusting structure includes:

[0014] Two threaded holes are respectively arranged on the two limiting plates and both penetrate in the up and down direction; the two threaded holes are coaxially arranged and have opposite thread directions; and

[0015] A distance-adjusting screw is arranged on the base, its axial direction is parallel to the up and down direction, and it is rotationally connected with the base in the up and down direction;

[0016] Wherein, the distance-adjusting screw is threadedly connected with the two threaded holes and is drivingly connected with a rotation driving member.

[0017] Preferably, the rotation driving member includes a driving handle with an axial direction parallel to the horizontal direction; the driving handle is rotationally connected with the base along its own axial direction, and there is a transmission structure between it and the distance-adjusting screw; wherein, the transmission structure includes:

[0018] A worm wheel is coaxially connected to the distance-adjusting screw; and

[0019] A worm is coaxially connected to the driving handle and meshes with the worm wheel.

[0020] Preferably, the linear driving member includes:

[0021] A driving screw is rotationally connected to the base in the horizontal direction, and its axial direction is parallel to the axial direction of the mounting hole; and

[0022] A transmission nut is fixedly connected to the pushing member and is threadedly connected with the driving screw.

[0023] Preferably, an operating part extending radially outward is provided on the driving screw.

[0024] Preferably, two guide rails are provided on the base and arranged side by side in the horizontal direction and both extend along the axial direction of the mounting hole; the pushing member is slidably connected to the two guide rails, and the transmission nut is located between the two guide rails.

[0025] Preferably, a convex part adapted to be inserted between the two profiles is provided on one side of the pushing member facing the mounting hole.

[0026] Preferably, an expansion ring for contacting the outer wall of the profile is fixedly provided on the inner wall of the mounting hole.

[0027] In the embodiment of the present application, by mounting the base on the drilling device, first, the two profiles to be drilled are symmetrically attached together, the front ends of the two profiles are inserted into the mounting hole, then the pushing member is moved towards the mounting hole until it abuts against the rear ends of the two profiles, and finally the rotation limiting component is connected to the two profiles to limit their rotation; when drilling is required, the drill bit is moved towards the fixing groove direction until it penetrates the two profiles to complete the drilling operation; since the two profiles are in the attached state when assembling the rubber cylinder part during drilling, the holes drilled on the two profiles can accurately coincide, facilitating the subsequent installation of the fixing bolts.

[0028] Compared with the prior art, the positioning tooling for rubber cylinder parts provided by the embodiment of the present application can perform the drilling operations of two profiles simultaneously at one time. Since the drilling positions of the two profiles are unified, after the two profiles are symmetrically attached, the corresponding positioning holes can accurately coincide, improving the product quality of the rubber cylinder parts.

[0029] The technical solution adopted by the present application also provides a drilling device, including the positioning tooling for rubber cylinder parts proposed in any one of the foregoing.

[0030] The beneficial effects of the drilling device provided in this embodiment are the same as those of the foregoing positioning tooling for rubber cylinder parts, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 Schematic three-dimensional structure of a rubber cylinder part in the prior art Figure 1 ;

[0033] Figure 2 Schematic three-dimensional structure of a rubber cylinder part in the prior art Figure 2 ;

[0034] Figure 3 Schematic three-dimensional structure of the positioning tooling for the rubber cylinder part provided by the embodiment of the present application Figure 1 ;

[0035] Figure 4 Schematic three-dimensional structure of the positioning tooling for the rubber cylinder part provided by the embodiment of the present application Figure 2 ;

[0036] Figure 5 Schematic cross-sectional structure of the positioning tooling for the rubber cylinder part provided by the embodiment of the present application Figure 1 ;

[0037] Figure 6 Schematic three-dimensional structure of the positioning tooling for the rubber cylinder part provided by the embodiment of the present application Figure 3 ;

[0038] Figure 7 Schematic cross-sectional structure of the positioning tooling for the rubber cylinder part provided by the embodiment of the present application Figure 2 ;

[0039] Figure 8 Schematic three-dimensional structure diagram of the pushing member adopted in the embodiment of the present application;

[0040] Figure 9 Schematic three-dimensional structure diagram of the limiting plate adopted in the embodiment of the present application.

[0041] Among them, each reference numeral in the figure:

[0042] 1. Base; 11. Mounting hole; 12. Expansion ring; 13. Guide rail; 2. Pushing member; 21. Protrusion; 3. Rotation limiting assembly; 31. Limiting plate; 311. Clamping portion; 312. Avoidance hole; 41. Threaded hole; 42. Spacing adjustment screw; 43. Transmission structure; 431. Worm gear; 432. Worm; 44. Driving handle; 5. Linear driving member; 51. Driving screw; 511. Operating portion; 52. Transmission nut; 6. Profile; 61. Fixed groove; 62. Positioning hole; 63. Fixed bolt; 64. Fitting surface; 7. Drilling device; 71. Drill bit. Detailed implementation manners

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0047] Please refer to Figures 3 to 9 together. Now, a positioning tooling for rubber cylinder parts provided by the present application will be described. The positioning tooling for rubber cylinder parts includes a base 1, a pushing member 2, and a rotation limiting assembly 3.

[0048] It should be stated in advance that the positioning tooling proposed in the present application is applicable to Figure 1 and Figure 2 the rubber cylinder parts shown; wherein, this rubber cylinder part includes two symmetrically fitted profiles 6, and each profile 6 has a plurality of fixing grooves 61 on the side facing away from the fitting surface 64; wherein, the bottom of each fixing groove 61 is parallel to the fitting surface 64 and is used to connect with a drill bit 71.

[0049] It should be supplemented that the rubber cylinder part is composed of two identical profiles 6 symmetrically fitted; as Figure 1 shown, the rubber cylinder part adopts a frustum-shaped structure with a hollow interior and axially reduced diameter. Generally, the small-diameter end of the rubber cylinder part is called the front end, and the large-diameter end is called the rear end; and, each profile 6 has a plurality of fixing grooves 61 on the side facing away from the fitting surface 64; the bottom of each fixing groove 61 is parallel to the fitting surface 64, and the bottom of each fixing groove 61 has a plurality of positioning holes 62. As Figure 2As shown, when assembling the rubber cylinder parts, it is necessary to first symmetrically fit two profiles 6, and then insert fixing bolts 63 into the corresponding positioning holes 62 for fixation; therefore, before assembling the profiles 6, a drilling process needs to be carried out first.

[0050] The base 1 is installed on the workbench of the drilling device 7 in the form of a caliper or bolts, and the base 1 is placed directly below the drill bit 71. An installation hole 11 is provided on the base 1, which penetrates horizontally and is suitable for the front ends of two profiles 6 to be inserted; the installation hole 11 adopts a tapered hole structure with a reduced diameter along the axial direction. When the profile 6 is inserted into the installation hole 11, the inner peripheral wall of the installation hole 11 is suitable for contacting the outer peripheral wall of the profile 6 to limit the front end of the profile 6 from continuing to enter the installation hole 11; moreover, the size and shape of the installation hole 11 can be adjusted according to the specifications of the profile 6.

[0051] The pushing member 2 is slidably arranged on the base 1 along the axial direction of the installation hole 11. The pushing member 2 is suitable for abutting against the rear ends of two profiles 6, and it is drivingly connected with a linear driving member 5; the linear driving member 5 can drive the pushing member 2 to move towards or away from the installation hole 11; when the pushing member 2 abuts against the rear ends of two profiles 6, the cooperation between the pushing member 2 and the installation hole 11 can limit the movement of the two profiles 6 in the horizontal and vertical directions.

[0052] The rotation limiting assembly 3 is arranged on the base 1, and the rotation limiting assembly 3 is used to connect with two profiles 6 to limit the rotation of the two profiles 6 so that the bottom of each fixing groove 61 faces the up and down directions; when the pushing member 2 abuts against the rear ends of two profiles 6, the cooperation of the rotation limiting assembly 3, the pushing member 2 and the installation hole 11 can limit the movement of the two profiles 6 in the horizontal and vertical directions, and can also limit the rotation of the two profiles 6 around the axis of the installation hole 11, that is, to realize the complete fixation of the two profiles 6, prevent the two profiles 6 from shifting during the drilling process, and improve the drilling quality of the profiles 6.

[0053] In the embodiment of the present application, by installing the base 1 on the drilling device 7, first, two profiles 6 to be drilled are symmetrically fitted together, the front ends of the two profiles 6 are inserted into the installation hole 11, then the pushing member 2 is moved towards the installation hole 11 until it abuts against the rear ends of the two profiles 6, and finally the rotation limiting assembly 3 is connected with the two profiles 6 to limit their rotation; when drilling is required, the drill bit 71 is moved towards the fixing groove 61 until it penetrates the two profiles 6 to complete the drilling operation; since the two profiles 6 are in the fitting state when assembling the rubber cylinder parts during drilling, the holes drilled on the two profiles 6 can accurately coincide, which is convenient for the subsequent installation of the fixing bolts 63.

[0054] Compared with the prior art, the positioning tooling for rubber cylinder parts provided by the embodiments of the present application can perform the drilling operations on two profiles 6 simultaneously at one time. Since the two profiles 6 are limited by the mounting holes 11 and the pushing members 2, the drilling positions can be locked. Moreover, after the two profiles 6 are symmetrically attached, the corresponding two positioning holes 62 can be accurately communicated, ensuring the product quality of the rubber cylinder parts.

[0055] In some embodiments, please refer to Figures 3 to 7 and Figure 9 As a specific implementation manner of the positioning tooling for rubber cylinder parts provided by the present application, the rotation-limiting assembly 3 includes two limiting plates 31.

[0056] The two limiting plates 31 are symmetrically arranged on the upper and lower sides of the mounting hole 11, and both of the two limiting plates 31 are slidably connected to the base 1 in the up-and-down direction; there is an adjustable-distance structure between the two limiting plates 31, and the adjustable-distance structure can drive the two limiting plates 31 to move towards each other or away from each other; each limiting plate 31 is provided with a plurality of clamping portions 311 adapted to be respectively embedded in a plurality of fixing grooves 61 one by one, and each clamping portion 311 is provided with a plurality of avoiding holes 312 that penetrate in the up-and-down direction and correspond to a plurality of positioning holes 62 to be processed one by one.

[0057] In this embodiment, the upper end of each avoiding hole 312 has a chamfer structure; when the drill bit 71 is inserted into the avoiding hole 312, this chamfer structure can contact the drill bit 71, so that the drill bit 71 and the clamping portion 311 move relatively, thereby playing a role in radially fine-tuning the drill bit 71 along the avoiding hole 312.

[0058] Among them, when the front ends of the two profiles 6 are inserted into the mounting hole 11 and the pushing member 2 abuts against the rear ends of the two profiles 6, the adjustable-distance structure is adapted to drive the two limiting plates 31 to move towards each other, so that each clamping portion 311 is embedded in the corresponding fixing groove 61, thereby restricting the two profiles 6 from rotating around the axis of the mounting hole 11.

[0059] By adopting the above technical solution, the positions of the plurality of avoiding holes 312 are set according to the positions of the plurality of positioning holes 62 on the two profiles 6. During drilling, the drill bit 71 can drill into the two profiles 6 through the avoiding holes 312 to complete the opening operation of the positioning holes 62. Since the positions of the plurality of avoiding holes 312 are fixed, the positions of the plurality of positioning holes 62 drilled on the two profiles 6 are also accurate. Therefore, after the two profiles 6 are symmetrically attached, the corresponding positioning holes 62 can be accurately attached, improving the product quality of the rubber cylinder parts.

[0060] In some embodiments, please refer to Figures 3 to 7 As a specific implementation manner of the positioning tooling for rubber cylinder parts provided by the present application, the adjustable-distance structure includes two threaded holes 41 and an adjustable-distance screw 42.

[0061] Two threaded holes 41 are respectively arranged on two limiting plates 31, and both of the two threaded holes 41 penetrate through in the up-and-down direction; the two threaded holes 41 are coaxially arranged, and their thread directions are opposite.

[0062] The distance-adjusting screw rod 42 is arranged on the base 1. The axial direction of the distance-adjusting screw rod 42 is parallel to the up-and-down direction, and the distance-adjusting screw rod 42 is rotationally connected to the base 1 in the up-and-down direction.

[0063] Wherein, the distance-adjusting screw rod 42 is threadedly connected to the two threaded holes 41, and a rotation driving member is drivingly connected thereto.

[0064] By adopting the above technical solution, the two threaded holes 41 and the distance-adjusting screw rod 42 together form a positive and negative thread driving lead screw structure. The positive and negative thread driving lead screw has the advantages of stable transmission, small occupied space and simple operation. Therefore, the operator can realize the approaching movement or the separating movement of the two limiting plates 31 by simply rotating the distance-adjusting screw rod 42.

[0065] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 6 . As a specific implementation manner of the positioning tooling for rubber cylinder parts provided by the present application, the rotation driving member includes a driving handle 44 whose axial direction is parallel to the horizontal direction; the driving handle 44 is rotationally connected to the base 1 along its own axial direction, and there is a transmission structure 43 between it and the distance-adjusting screw rod 42; wherein, the transmission structure 43 includes a worm gear 431 and a worm 432.

[0066] The worm gear 431 is coaxially connected to the distance-adjusting screw rod 42; the worm 432 is coaxially connected to the driving handle 44, and the worm 432 meshes with the worm gear 431.

[0067] By adopting the above technical solution, the operator rotates the driving handle 44 to drive the worm 432 to rotate. At the same time, the worm 432 drives the worm gear 431 to rotate, and then the worm gear 431 drives the distance-adjusting screw rod 42 to rotate, so as to make the two limiting plates 31 approach or separate; the transmission meshing of the worm gear 431 and the worm 432 has self-locking property, and reverse self-locking can be realized, that is, only the worm 432 can drive the worm gear 431, and the worm gear 431 cannot drive the worm 432; therefore, after adjusting the distance-adjusting screw rod 42, self-locking can be realized between the worm gear 431 and the worm 432. At this time, the two limiting plates 31 are also locked, ensuring that the distance between the two limiting plates 31 does not change after adjusting the distance-adjusting screw rod 42, and improving the limiting effect of the two limiting plates 31.

[0068] In some embodiments, please refer to Figures 3 to 7 together. As a specific implementation manner of the positioning tooling for rubber cylinder parts provided by the present application, the linear driving member 5 includes a driving screw rod 51 and a transmission nut 52.

[0069] The driving screw rod 51 is rotatably connected to the base 1 in the horizontal direction, and the axial direction of the driving screw rod 51 is parallel to the axial direction of the mounting hole 11.

[0070] The transmission nut 52 is fixedly connected to the pushing member 2, and the transmission nut 52 is threadedly connected to the driving screw rod 51.

[0071] By adopting the above technical solution, an operator can achieve the technical purpose of moving the pushing member 2 towards or away from the mounting hole 11 by rotating the driving screw rod 51.

[0072] In some embodiments, please refer to Figures 3 to 7 As a specific implementation manner of the positioning tooling for rubber cylinder parts provided by this application, the driving screw rod 51 has an operating portion 511 extending radially outward.

[0073] By adopting the above technical solution, an operator can more conveniently apply an external force to rotate the driving screw rod 51, improving the operation efficiency.

[0074] In some embodiments, please refer to Figures 3 to 7 As a specific implementation manner of the positioning tooling for rubber cylinder parts provided by this application, the base 1 has two guide rails 13 arranged side by side in the horizontal direction and both extending along the axial direction of the mounting hole 11; the pushing member 2 is slidably connected to the two guide rails 13, and the transmission nut 52 is located between the two guide rails 13; the surfaces of the guide rails 13 are polished, which can reduce the friction force when the pushing member 2 slides on the two guide rails 13.

[0075] In some embodiments, please refer to Figures 5 to 8 As a specific implementation manner of the positioning tooling for rubber cylinder parts provided by this application, the side of the pushing member 2 facing the mounting hole 11 has a convex portion 21 adapted to be inserted between two profiles 6.

[0076] By adopting the above technical solution, when the pushing member 2 abuts against the rear ends of the two profiles 6, the convex portion 21 can be inserted between the two profiles 6, and the convex portion 21 can partially enter the area inside the mounting hole 11. Therefore, the convex portion 21 and the inner peripheral wall of the mounting hole 11 can stably fix the rear ends of the two profiles 6.

[0077] In some embodiments, please refer to Figure 5 and Figure 7, as a specific implementation manner of the positioning tooling for the rubber cylinder part provided in this application, an expansion ring 12 for contacting the outer wall of the profile 6 is fixedly arranged on the inner wall of the mounting hole 11; the expansion ring 12 is an air-filled sealing ring. When two profiles 6 are inserted into the mounting hole 11, by inflating the inside of the expansion ring 12, the expansion ring 12 can be expanded. At this time, the inner peripheral wall of the expansion ring 12 presses against the outer peripheral walls of the two profiles 6, thereby stably fixing the two profiles 6.

[0078] The technical solution adopted in this application also provides a punching device, including the positioning tooling for the rubber cylinder part proposed in any one of the foregoing.

[0079] The beneficial effects of the punching device provided in this embodiment are the same as those of the foregoing positioning tooling for the rubber cylinder part, and will not be elaborated herein.

[0080] The foregoing are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A positioning tool for a rubber cylinder, wherein the rubber cylinder comprises two symmetrically fitted profiles, and each of the profiles has a plurality of fixing grooves on a side facing away from the fitting surface; wherein: The bottom of each of the fixing grooves is parallel to the fitting surface and is used to connect with the drill bit; characterized in that the positioning tooling comprises: A base, used for mounting on the drilling device, which is located directly below the drill bit and has a mounting hole that penetrates in the horizontal direction and is suitable for inserting the front ends of the two profiles; A push member is slidably disposed on the base along the axial direction of the mounting hole, is suitable for abutting against the rear ends of the two profiles, and is transmission-connected with a linear drive member; and The rotation limiting component is arranged on the base and is used to connect with the two profiles to limit the rotation of the two profiles so that the bottom of each fixing groove faces the up and down direction.

2. The positioning tool for the rubber cylinder according to claim 1, characterized in that: The rotation limiting component comprises: Two limit plates are symmetrically arranged on the upper and lower sides of the mounting hole, and are both slidably connected to the base in the up-down direction; a distance adjustment structure is provided between the two limit plates; each of the limit plates has a plurality of clamping parts suitable for one-to-one corresponding embedding in a plurality of the fixing grooves, and each of the clamping parts has a plurality of avoidance holes penetrating in the up-down direction and corresponding one-to-one to the plurality of positioning holes to be processed; When the front ends of the two profiles are inserted into the mounting holes and the pushing members abut against the rear ends of the two profiles, the distance adjustment structure is suitable for driving the two limit plates to move toward each other so that each of the clamping parts is embedded in the corresponding fixing groove.

3. The positioning tool for the rubber cylinder according to claim 2, characterized in that: The distance adjustment structure comprises: Two threaded holes are respectively arranged on the two limit plates and are both penetrated in the up-down direction; the two threaded holes are coaxially arranged and have opposite thread directions; and A pitch-adjusting screw rod is arranged on the base, the axial direction of which is parallel to the up-down direction, and the screw rod is connected to the base for rotation along the up-down direction; Wherein, the pitch-adjusting screw is threadedly connected to the two threaded holes, and is transmission-connected to a rotation driving member.

4. The positioning tool for the rubber cylinder according to claim 3, characterized in that: The rotation driving member includes a driving handle whose axial direction is parallel to the horizontal direction; the driving handle is connected to the base along its own axial direction for rotation, and a transmission structure is provided between the driving handle and the pitch adjusting screw; wherein the transmission structure includes: A worm gear coaxially connected to the pitch-adjusting screw; and A worm is coaxially connected to the driving handle and meshes with the worm wheel.

5. The positioning tool for the rubber cylinder according to claim 1, characterized in that: The linear drive component comprises: A driving screw rod is rotatably connected to the base in a horizontal direction, and its axial direction is parallel to the axial direction of the mounting hole; and A transmission nut is fixedly connected to the push member and is threadedly connected to the driving screw.

6. The positioning tool for the rubber cylinder according to claim 5, characterized in that: The driving screw rod is provided with an operating portion extending radially outward.

7. The positioning tool for the rubber cylinder according to claim 5, characterized in that: The base is provided with two guide rails which are arranged in parallel in the horizontal direction and extend along the axial direction of the mounting hole; the push member is slidably connected to the two guide rails, and the transmission nut is located between the two guide rails.

8. The positioning tool for the rubber cylinder according to claim 1, characterized in that: The side of the pushing member facing the mounting hole has a protrusion suitable for being inserted between the two profiles.

9. The positioning tool for a rubber cylinder according to claim 1, characterized in that: An expansion ring for connecting with the outer wall of the profile is fixedly arranged on the inner wall of the mounting hole.

10. A punching device, characterized in that: A positioning tool for a rubber cylinder comprising any one of claims 1 to 9.

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