Clamping device and pressing mechanism

Abstract

The present invention discloses a clamping device and a pressing mechanism, wherein the clamping device comprises: a fixed seat; a linkage member, comprising a connecting portion, and a first movable end and a second movable end respectively arranged on both sides of the connecting portion, wherein the connecting portion is rotatably connected to the fixed seat; a power module, wherein the power module is mounted on the fixed seat, and the output shaft of the power module is used to drive the first movable end so that the first movable end and the second movable end rotate with the connecting portion as the axis; an extension member extending along the length direction of the linkage member, wherein one end of the extension member is connected to the output shaft of the power module for the first movable end to slide and abut, and the other end of the extension member is adjacent to the connecting portion; a clamping assembly, wherein the clamping assembly is mounted on the fixed seat, and one end of the clamping assembly is connected to the second movable end to generate a clamping force. The technical solution of the present invention simplifies the transmission mechanism of the clamp and improves the transmission efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a clamping device and a pressing mechanism. Background Art

[0002] In industrial production, the cylinder body usually provides power for the clamp, driving the clamp to open and close so that the clamp can fix the material. However, when the existing cylinder body is working, the output shaft is connected to the moving part through a hinge. When the output shaft drives the moving part to rotate, the moving part guides the output shaft to rotate, so that the output shaft is eccentric with the cylinder body under the guidance of the moving part, causing serious friction between the output shaft and the cylinder head, causing wear of the cylinder head, affecting the sealing of the cylinder body, and thus reducing the service life of the cylinder body. Summary of the invention

[0003] The main purpose of the present invention is to provide a clamping device, aiming to simplify the transmission mechanism of the clamp and improve the transmission efficiency.

[0004] To achieve the above object, the clamping device proposed by the present invention comprises:

[0005] Fixed seat;

[0006] A linkage member, comprising a connecting portion, and a first movable end and a second movable end respectively arranged on both sides of the connecting portion, wherein the connecting portion is rotatably connected to the fixing seat;

[0007] A power module, the power module is mounted on the fixing seat, and the output shaft of the power module is used to drive the first movable end so that the first movable end and the second movable end rotate with the connecting portion as the axis;

[0008] An extension piece extending along the length direction of the linkage piece, one end of the extension piece being connected to the output shaft of the power module for sliding abutment of the first movable end, and the other end of the extension piece being adjacent to the connecting portion;

[0009] A clamping assembly is installed on the fixing seat, and one end of the clamping assembly is connected to the second movable end to generate a clamping force.

[0010] Optionally, the clamping device further comprises a guide seat and a guide member, wherein the guide seat is mounted on the fixing seat, and the guide seat is arranged on a side of the power module adjacent to the connecting portion;

[0011] The guide member is connected to one end of the extension member away from the power module, the guide member is slidably matched with the guide seat, and one end of the guide member away from the guide seat is connected to the extension member.

[0012] Optionally, the guide seat is provided with a guide hole, the guide member is arranged in the guide hole, and the guide member and the guide hole are slidably matched.

[0013] Optionally, the clamping device further comprises a guide bearing, the guide bearing is fixedly matched with the guide hole, the guide member is arranged in the guide bearing, and the guide member is slidingly matched with the guide bearing.

[0014] Optionally, a first positioning portion is provided on the hole wall of the guide hole; a second positioning portion is provided on the outer peripheral wall of the guide bearing, and the second positioning portion is positioned and matched with the first positioning portion.

[0015] Optionally, the clamping device further includes a clamping member;

[0016] The first positioning portion includes a first positioning groove formed on the inner wall of the guide hole, and the first positioning groove extends along the circumference of the guide hole;

[0017] The second positioning portion includes a second positioning groove formed in the guide bearing, the second positioning groove extends along the circumferential direction of the guide bearing, and the first positioning groove and the second positioning groove are fixed by the clamping member.

[0018] Optionally, the clamping device further comprises a pulley mounted on the first movable end, the pulley is rotatably connected to the linkage member, and the pulley abuts against the extension member.

[0019] Optionally, a connecting hole is provided on one side of the extension piece connected to the output shaft, and the guide piece is fixedly matched with the connecting hole.

[0020] Optionally, the extension piece is further provided with a locking hole, the locking hole passes through the hole wall of the connecting hole, and the clamping device further comprises a locking piece, the locking piece reinforces the guide piece through the locking hole.

[0021] To achieve the above object, the present invention further proposes a pressing mechanism, characterized in that the pressing mechanism comprises a base and the above-mentioned clamping device, and the clamping device is installed on the base.

[0022] The clamping device of the present invention is provided with a rotatably connected linkage member on a fixed seat, a power module is provided on a side of the fixed seat having the linkage member, an output shaft of the power module is connected to the first movable end of the connecting part, and the second movable end of the connecting part is connected to the clamping assembly, so that the power module can achieve the purpose of driving the clamping assembly to generate a clamping force by driving the connecting part. Secondly, an extension member is provided between the output shaft and the first movable end, so that when the first movable end rotates around the axis to generate an arc trajectory, the first movable end can still abut against the extension member, so that when the output shaft drives the first movable end to rotate around the axis, the output shaft can be abutted and connected with the first movable end through the extension member, and the output shaft is no longer guided by the rotation of the first movable end, so that the output shaft can ensure concentricity with the cylinder body during operation, thereby improving the service life of the power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a clamping device of the present invention;

[0025] Figure 2 It is a structural schematic diagram of another embodiment of the clamping device of the present invention;

[0026] Figure 3 It is a schematic diagram of the exploded structure of an embodiment of the clamping device of the present invention;

[0027] Figure 4 It is a schematic diagram of the assembly structure of the guide seat, guide bearing and guide member of an embodiment of the clamping device of the present invention;

[0028] Figure 5 for Figure 4 A partial enlarged view of point Ⅰ in the middle;

[0029] Figure 6 It is a schematic diagram of the assembly structure of the guide bearing and the guide member of an embodiment of the clamping device of the present invention;

[0030] Figure 7 It is a schematic structural diagram of an extension piece of a clamping device according to an embodiment of the present invention.

[0031] Description of Figure Numbers:

[0032]

[0033]

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The invention provides a clamping device.

[0039] In the embodiment of the present invention, Figures 1 to 6 As shown, the clamping device comprises:

[0040] Fixed seat 1;

[0041] The linkage member 2 comprises a connecting portion 21, and a first movable end 22 and a second movable end 23 respectively arranged on both sides of the connecting portion 21, wherein the connecting portion 21 is rotatably connected to the fixing seat 1;

[0042] A power module 3, the power module 3 is mounted on the fixing seat 1, and the output shaft 31 of the power module 3 is used to drive the first movable end 22, so that the first movable end 22 and the second movable end 23 rotate around the connecting portion 21 as the axis;

[0043] An extension member 4 extends along the length direction of the linkage member 2, one end of the extension member 4 is connected to the output shaft 31 of the power module 3 so as to be slidably abutted by the first movable end 22, and the other end of the extension member 4 is adjacent to the connecting portion 21;

[0044] The clamping assembly 5 is installed on the fixing seat 1 , and one end of the clamping assembly 5 is connected to the second movable end 23 to generate a clamping force.

[0045] In this embodiment, the overall shape of the fixed seat 1 can be a rectangular or square rectangle, etc., and can be used as a bearing medium, and no specific restrictions are made here. The overall shape of the connecting portion 21 can be a rectangular strip or a cylindrical shape, etc., and can be used as a supporting member, and no specific restrictions are made here. The first movable end 22 and the second movable end 23 are set at both ends of the length direction of the connecting portion 21. The first movable end 22 is used to receive power, and the second movable end 23 is used to transmit power to the next force-bearing component. The connecting portion 21 is arranged on the fixed seat 1 between the first movable end 22 and the second movable end 23. The connection method of the connecting portion and the base is a rotational connection. The connection between the connecting portion and the base forms an axis, and the connecting portion rotates around the axis.

[0046] The type of the power module 3 can be a motor, a hydraulic cylinder or a cylinder body, etc., which can drive the parts to move, and there is no specific limitation here. For example, when the power module 3 is a cylinder body, the output shaft 31 is concentric with the cylinder body, and the cylinder body drives the output shaft 31 to move the first movable end 22 along a set trajectory. The connection between the power module 3 and the first movable end 22 can be a hinge connection or abutment, etc., and there is no specific limitation here, as long as it can drive the first movable end 22 to move along a set trajectory.

[0047] The overall shape of the extension piece 4 can be a cuboid or a cylinder, etc., as long as there is enough area to abut the first movable end 22 when the connecting part 21 rotates. For example, when the overall shape of the extension piece 4 is a cuboid, the length direction of the extension piece 4 is parallel to the straight line formed by the first movable end 22 and the second movable end 23 of the connecting part 21, one end of the connecting piece in the length direction is connected to the output shaft 31 of the power module 3, and the end away from the output shaft 31 of the power module 3 slides and abuts against the first movable end 22. In this way, when the power module 3 drives the connecting part 21 through the extension piece 4, the connecting part 21 rotates around the axis to generate an arc trajectory. At this time, since the extension piece 4 is a cuboid, when the first movable end 22 rotates around the axis to generate an arc trajectory, the first movable end 22 can still abut against the extension piece 4, thereby avoiding the output shaft 31 being rotated by the first movable guide when driving the first movable end 22 to rotate, causing the output shaft 31 to be eccentric with the cylinder body.

[0048] The clamping assembly 5 can be cross-clamping or pressing, and there is no specific limitation here. It only needs to be able to fix the material to be clamped. The end of the clamping assembly 5 that is away from the fixed material is connected to the second movable end 23. The type of connection can be abutment or sliding. There is no specific limitation here. It only needs to be able to generate clamping force.

[0049] The clamping device of the present invention is provided with a rotatably connected linkage member 2 on a fixed seat 1, a power module 3 is provided on a side of the fixed seat 1 having the linkage member 2, an output shaft 31 of the power module 3 is connected to the first movable end 22 of the connecting portion 21, and the second movable end 23 of the connecting portion 21 is connected to the clamping assembly 5, so that the power module 3 can achieve the purpose of driving the clamping assembly 5 to generate a clamping force by driving the connecting portion 21. Secondly, an extension member 4 is provided between the output shaft 31 and the first movable end 22, so that when the first movable end 22 rotates around the axis to generate an arc trajectory, the first movable end 22 can still abut against the extension member 4, so that when the output shaft 31 drives the first movable end 22 to rotate around the axis, the output shaft 31 can be abutted and connected with the first movable end 22 through the extension member 4, and the output shaft 31 is no longer guided by the rotation of the first movable end 22, so that the output shaft 31 can ensure concentricity with the cylinder body during operation, thereby improving the service life of the power module 3.

[0050] Specifically, Figures 1 to 3 As shown, the clamping device also includes a guide seat 6 and a guide member 7. The guide seat 6 is installed on the fixed seat 1, and the guide seat 6 is arranged on the side of the power module 3 adjacent to the connecting portion 21; the guide member 7 is connected to the end of the extension member 4 away from the power module 3, and the guide member 7 is slidably matched with the guide seat 6, and the end of the guide member 7 away from the guide seat 6 is connected to the extension member 4.

[0051] The side of the guide seat 6 abuts against the fixed seat 1, and one end of the guide seat 6 is adjacent to one side of the power module 3. At the same time, the guide seat 6 is located on the side of the power module 3 close to the linkage 2. The guide member 7 is arranged at the end of the guide seat 6 close to the power module 3. At the same time, the extension direction of the guide member 7 is arranged parallel to the output shaft 31, so that the guide member 7 can guide the output shaft 31. The connection between the guide seat 6 and the guide member 7 is a sliding connection. The guide member 7 is fixedly connected to the extension member 4 at one end away from the guide shaft. In this way, when the output shaft 31 drives the extension member 4 and the guide member 7 connected to the extension member 4 to move, if the linkage 2 guides the output shaft 31 to deviate from the cylinder body, the guide member 7 plays a guiding and correcting role to improve the concentricity of the output shaft 31 and the cylinder body, thereby reducing the friction between the output shaft 31 and the cylinder head.

[0052] Specifically, Figure 3 As shown, the guide seat 6 is provided with a guide hole 61 , the guide member 7 is disposed in the guide hole 61 , and the guide member 7 and the guide hole 61 are slidably matched.

[0053] The overall shape of the guide member 7 can be a strip or a cylinder, etc., and there is no specific limitation here, as long as it can play a guiding role. In order to make the connection between the guide seat 6 and the guide member 7 more reliable, the guide seat 6 is provided with a guide hole 61, and the shape of the guide hole 61 is the same as the shape of the guide member 7. For example, when the guide member 7 is cylindrical, the guide hole 61 is circular, and the guide hole 61 is slightly larger than the guide member 7, so that the guide member 7 is set in the guide hole 61 to slide.

[0054] Specifically, Figure 2 and Figure 3 As shown, the clamping device further includes a guide bearing 6, the guide bearing 6 is fixedly matched with the guide hole 61, the guide member 7 is arranged in the guide bearing 6, and the guide member 7 is slidably matched with the guide bearing 6. The hole wall of the guide hole 61 is provided with a first positioning portion 611; the outer peripheral wall of the guide bearing 6 is provided with a second positioning portion 81, and the second positioning portion 81 is positioned and matched with the first positioning portion 611.

[0055] In order to reduce the friction between the guide member 7 and the guide seat 6, a guide bearing 6 is arranged between the guide member 7 and the guide shaft, so as to reduce the friction between the guide shaft and the guide member 7, thereby reducing the power loss of the power module 3. At the same time, in order to fix the guide bearing 6, the inner wall of the guide hole 61 is provided with a first fixing position, and the outer wall of the guide bearing 6 is provided with a second fixing position. There are many ways to match the first fixing position and the second fixing position, such as a magnetic component or a buckle component, etc., which are not specifically limited here. For example, when the first fixing position is a first magnet and the second component is a second magnet, the guide bearing 6 can be connected to the guide seat 6 as long as the polarities of the first magnet and the second magnet are different at one end, so as to achieve the purpose of fixing.

[0056] Specifically, Figure 3 and Figure 4 As shown, the clamping device also includes a clip; the first positioning portion 611 includes a first positioning groove opened on the inner wall of the guide hole 61, and the first positioning groove extends along the circumference of the guide hole 61; the second positioning portion 81 includes a second positioning groove opened on the guide bearing 6, and the second positioning groove extends along the circumference of the guide bearing 6, and the first positioning groove and the second positioning groove are fixed by the clip.

[0057] The clamping member is a ring spring arranged in an annular shape. The groove shape of the first positioning groove can be rectangular or fan-shaped, etc., and no specific limitation is made here. It is only necessary to arrange part of the clamping member in the first positioning groove. The first positioning groove is arranged on the inner wall of the guide hole 61 and extends circumferentially along the inner wall of the guide hole 61. There can be multiple first positioning grooves, and the specific number is not specifically limited here. There is a gap between the first positioning grooves so that the first positioning groove is more stable after being connected with the second positioning groove.

[0058] The groove shape of the second positioning groove can be rectangular or fan-shaped, etc., and there is no specific limitation here. It is only necessary to set part of the clamping member in the second positioning groove. The second positioning groove is set on the outer wall of the guide bearing and extends circumferentially along the outer wall of the guide bearing. There can be multiple second positioning grooves, and at the same time, there is a spacing between the second positioning grooves, and the spacing is the same as the spacing of the first positioning grooves, so that the clamping member can fix the guide bearing 6 through the cooperation of the first positioning groove and the second positioning groove.

[0059] Specifically, Figure 2 As shown, the clamping device further includes a pulley 221 mounted on the first movable end 22, the pulley 221 is rotatably connected to the linkage member 2, and the pulley abuts against the extension member 4. The pulley 221 is arranged at the abutment between the first movable end 22 and the extension member 4. The type of the pulley 221 can be a bearing or a wheel, etc., and no specific limitation is made here, as long as it can reduce the friction force when the first movable end 22 is connected to the extension member 4. In this way, the loss caused by friction between the first movable end 22 and the extension member 4 is reduced.

[0060] Specifically, Figure 6 As shown, a connecting hole 41 is provided on one side of the extension member 4 connected to the output shaft 31, and the guide member 7 is fixedly matched with the connecting hole 41. The extension member 4 is also provided with a locking hole 42, which passes through the hole wall of the connecting hole 41, and the clamping device further includes a locking member, which reinforces the guide member 7 through the locking hole 42.

[0061] The connection hole 41 is provided on one side where the extension member 4 is connected to the output shaft 31. The connection hole 41 may be provided through the extension member 4 or not. There is no specific limitation here. The guide member 7 can be provided in the connection hole 41 for connection. For example, when the connection hole 41 is provided through, the guide member 7 can be provided in the connection hole 41 for fixation. In this way, the contact area between the guide member 7 and the connection hole 41 is increased, so that the connection between the guide member 7 and the connection hole 41 can be more reliable. At the same time, in order to improve the stability of the connection between the guide member 7 and the extension member 4, the guide member 7 is provided with a locking hole 42. The number of the locking holes 42 can be multiple. The multiple locking holes 42 are provided around the connection hole 41 and are provided through the hole wall of the connection hole 41. Then, the guide member 7 is fixed by providing multiple locking members to penetrate the locking holes 42. In this way, the connection between the guide member 7 and the extension member 4 can be more stable.

[0062] Of course, it should be noted that the connecting portion 21 is provided with an avoidance hole 44, and the avoidance hole 44 is used to avoid the installation of the fixing seat 1 and the base. The connecting portion 21 is provided with an avoidance protrusion 43, and the axis is arranged on the avoidance protrusion 43. A first distance is formed between the axis and the first movable end 22, and a second distance is formed between the axis and the second movable end 23, and the first distance is greater than the second distance.

[0063] The avoidance hole 44 is provided on the side where the connection part 21 abuts against and is opposite to the fixing seat 1. The avoidance hole 44 is provided through the connection part 21, so that when bases of different heights are interchanged, the fixing seat 1 can be interchanged without disassembling the linkage member 2, thereby improving the replacement efficiency. The connection part 21 is provided with an avoidance protrusion 43 at the edge of the avoidance hole 44, and the avoidance protrusion 43 connects the two ends of the connection part 21 to enhance the insufficient rigidity of the connection part 21 caused by the opening of the avoidance hole 44, thereby improving the stability of the connection part 21. The axis is provided on the avoidance protrusion 43 to make full use of the protruding space and achieve the purpose of reasonable layout.

[0064] In order to save the power output of the power module 3, the first spacing needs to be greater than the second spacing. In this way, when the output shaft 31 of the power module 3 is set at the first movable end 22, the distance from the first movable end 22 to the axis forms a power arm, the distance from the second movable end 23 to the axis forms a resistance arm, the axis forms a fulcrum, and the power arm, the fulcrum and the resistance arm form a lever. The power of the power module 3 is transmitted to the second movable end 23 through the first movable end 22, and then transmitted to the next force-bearing component through the second movable end 23. Since the power transmission mode of the connecting part 21 is lever transmission, and at the same time, since the power arm is larger than the resistance arm, the power is amplified during the power transmission, so that the power module 3 can save power.

[0065] In addition, the clamping device further includes a protective cover 93, which is mounted on a side of the guide seat 6 adjacent to the linkage member 2, and the linkage member 2 is mounted in the cavity of the protective cover 93. The side of the protective cover 93 having the cavity is mounted on a side of the guide seat 6 adjacent to the linkage member 2, so that the linkage member 2 is protected by the cavity of the protective cover 93, thereby improving safety during use.

[0066] In addition, the clamping device also includes a dustproof block 91 and a dustproof plate 92. The dustproof block 91 is arranged between the clamping assembly 5 and the guide seat 6 to prevent dust from entering the clamping assembly 5 and the guide seat 6. The dustproof plate 92 is arranged on the side of the guide seat 6 and the clamping assembly 5 away from the fixed seat 1. The dustproof plate 92 covers the linkage 2 and the clamping assembly 5.

[0067] The shape of the dust block 91 is equivalent to the angle formed by the clamping assembly 5 and the guide seat 6, so that the dust block 91 is arranged between the clamping assembly 5 and the guide seat 6 for dust prevention. The specific shape of the dust plate 92 is not specifically limited, and it only needs to prevent dust from entering after being arranged on the guide seat 6 and the clamping assembly 5. Dust is prevented from entering the guide seat 6 and the clamping assembly 5, thereby increasing the friction between the guide seat 6 and the clamping assembly 5. In addition, the dust plate 92 also plays a protective role, preventing people or foreign objects from touching the moving part of the clamping assembly 5, as well as the guide seat 6 and the connected parts, thereby avoiding accidents.

[0068] To achieve the above purpose, the present invention provides a pressing mechanism, which includes a base and a clamping device, and the clamping device is installed on the base. Specifically, the clamping device and the base are detachably connected, and the description and expansion content of the pressing mechanism and the derivation of the technical effect are basically the same as those of the above-mentioned clamping device, and will not be repeated here.

[0069] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A clamping device, characterized in that: include: A fixed seat; a linkage member, comprising a connecting portion, and a first movable end and a second movable end respectively arranged on both sides of the connecting portion, wherein the connecting portion is rotatably connected to the fixed seat; A power module, the power module is mounted on the fixing seat, and the output shaft of the power module is used to drive the first movable end so that the first movable end and the second movable end rotate with the connecting portion as the axis; An extension piece extending along the length direction of the linkage piece, one end of the extension piece being connected to the output shaft of the power module for sliding abutment of the first movable end, and the other end of the extension piece being adjacent to the connecting portion; A clamping assembly, wherein the clamping assembly is mounted on the fixing seat, and one end of the clamping assembly is connected to the second movable end to generate a clamping force; The clamping device further comprises a guide seat and a guide member, wherein the guide seat is mounted on the fixing seat, and the guide seat is arranged on a side of the power module adjacent to the connecting portion; the guide member is connected to an end of the extension member away from the power module, the guide member is slidably matched with the guide seat, and an end of the guide member away from the guide seat is connected to the extension member; The clamping device further comprises a pulley mounted on the first movable end, the pulley is rotatably connected to the linkage member, and the pulley abuts against the extension member; A connecting hole is provided on one side of the extension piece connected to the output shaft, and the guide piece is fixedly matched with the connecting hole.

2. The clamping device according to claim 1, characterized in that: The guide seat is provided with a guide hole, the guide member is arranged in the guide hole, and the guide member and the guide hole are slidably matched.

3. The clamping device according to claim 2, characterized in that: The clamping device also includes a guide bearing, which is fixedly matched with the guide hole, and the guide member is arranged in the guide bearing, and the guide member is slidably matched with the guide bearing.

4. The clamping device according to claim 3, characterized in that: The hole wall of the guide hole is provided with a first positioning portion; the outer peripheral wall of the guide bearing is provided with a second positioning portion, and the second positioning portion is positioned and matched with the first positioning portion.

5. The clamping device according to claim 4, characterized in that: The clamping device also includes a clip; the first positioning portion includes a first positioning groove opened on the inner wall of the guide hole, and the first positioning groove extends along the circumference of the guide hole; the second positioning portion includes a second positioning groove opened on the guide bearing, and the second positioning groove extends along the circumference of the guide bearing, and the first positioning groove and the second positioning groove are fixed by the clip.

6. The clamping device according to claim 1, characterized in that: The extension piece is also provided with a locking hole, which passes through the hole wall of the connecting hole. The clamping device also includes a locking piece, which reinforces the guide piece through the locking hole.

7. A pressing mechanism, characterized in that: The pressing mechanism comprises a base and a clamping device according to any one of claims 1 to 6, wherein the clamping device is mounted on the base.

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