Fixing mechanism and clamping device

Abstract

A fixing mechanism and a clamping device. The fixing mechanism comprises a housing (1), and a clamping member (2) and a transmission member (4) which are mounted in the housing (1), and a driving assembly (3) which is rotationally mounted in the housing (1), wherein the transmission member (4) comprises a first transmission rod (41) and a second transmission rod (42), first ends of the first transmission rod (41) and the second transmission rod (42) respectively being mounted at two ends of the clamping member (2), and two ends of the driving assembly (3) respectively cooperating with second ends of the first transmission rod (41) and the second transmission rod (42). The driving assembly (3) is configured to drive the first transmission rod (41) and the second transmission rod (42) to swing, such that the first transmission rod (41) and the second transmission rod (42) drive the two ends of the clamping member (2), allowing the clamping member (2) to realize the functions of clamping and abutting against a workpiece or a support assembly. The driving assembly (3) is used to drive the clamping member (2), such that a first abutting block (21) and a second abutting block (22) on the clamping member (2) move simultaneously, thereby improving the adjustment efficiency of the fixing mechanism, and alleviating the problem of low adjustment efficiency in existing fixing mechanisms.

Description

Fixing mechanism and clamping device

[0001] The present invention claims priority to Chinese patent application No. 2024206877425, filed with the Patent Office of China on April 3, 2024, entitled “Fixing Mechanism and Clamping Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The utility model belongs to the technical field of workpiece clamping, in particular to a fixing mechanism and a clamping device. Background Art

[0003] A machining center is a milling machine, drilling machine, or lathe that performs cutting operations on workpieces. It can also be an assembly machine. A workpiece, such as a piston rod or connecting rod, is held in place by a workholding mechanism during machining. This mechanism consists of one or more support columns that hold the workpiece.

[0004] Multiple fixing mechanisms can be adjusted or assembled according to the installation requirements of the workpiece. Two adjacent workpiece fixing mechanisms are fixed together by support columns, which are fixed by abutment blocks. The support columns are generally fixed by using a tool to adjust the abutment blocks on the outer surface of the fixing mechanism, so that the abutment blocks move and fix to the support columns. However, when two opposing abutment blocks need to be adjusted, they need to be adjusted separately, resulting in low adjustment efficiency.

[0005] Utility Model Content

[0006] The purpose of the utility model is to improve the problem of low adjustment efficiency in the existing fixing mechanism and to provide a fixing mechanism and a clamping device.

[0007] The technical solutions to achieve the above objectives include the following:

[0008] A fixing mechanism includes a housing, a clamping member and a transmission member installed in the housing, and a drive assembly rotatably installed in the housing, the transmission member includes a first transmission rod and a second transmission rod, the first ends of the first transmission rod and the second transmission rod are respectively installed at the two ends of the clamping member, and the two ends of the drive assembly are respectively matched with the second ends of the first transmission rod and the second transmission rod.

[0009] In one embodiment, the drive assembly includes a screw, a first drive block and a second drive block, the first drive block is sleeved on the first end of the screw and installed on the first transmission rod, the second drive block is sleeved on the second end of the screw and installed on the second transmission rod, and the first end and the second end of the screw are respectively threadedly engaged with the first drive block and the second drive block.

[0010] In one embodiment, the two ends of the screw rod have a first external thread and a second external thread respectively, the first drive block has a first internal thread, the second drive block has a second internal thread, the first external thread cooperates with the first internal thread, and the second external thread cooperates with the second internal thread.

[0011] In one embodiment, the thread direction of the first external thread is opposite to that of the second external thread, and the thread direction of the first internal thread is opposite to that of the second internal thread.

[0012] In one embodiment, the clamping member includes a first abutment block and a second abutment block, the first end of the first abutment block is installed on the first transmission rod, the first end of the second abutment block is installed on the second transmission rod, and a clamping position is formed between the second end of the first abutment block and the second end of the second abutment block.

[0013] In one embodiment, the fixing mechanism also includes a support assembly, which is installed in the outer shell and is at least partially located in the clamping position; the first abutment block and the second abutment block are staggered in the circumferential direction of the support assembly, and the first abutment block and the second abutment block are both used to abut against the support assembly.

[0014] In one embodiment, the first abutting block or the second abutting block includes an abutting portion, a pushing portion, and a pin shaft. The abutting portion and the pushing portion are an integrated structure. The pushing portion is slidably engaged with the inner wall of the housing. A U-shaped groove is formed on one side of the pushing portion, and the pin shaft is installed in the U-shaped groove.

[0015] The first transmission rod or the second transmission rod is provided with a pin hole, and the pin shaft passes through the pin hole, so that the pushing part rotates and cooperates with the first transmission rod or the second transmission rod through the pin shaft.

[0016] In one embodiment, the first transmission rod or the second transmission rod includes a first connecting rod, a second connecting rod, and a rotating shaft. The first connecting rod and the second connecting rod are an integrated structure. The connection between the first connecting rod and the second connecting rod has an axial hole. The two ends of the rotating shaft are respectively installed on the outer shell and the axial hole. The first transmission rod or the second transmission rod rotates with the outer shell through the rotating shaft.

[0017] In one embodiment, the length of the first connecting rod is greater than the length of the second connecting rod, and the volume of the first connecting rod is greater than the volume of the second connecting rod.

[0018] The present utility model also proposes a clamping device, comprising a base and a fixing mechanism as described above, wherein the supporting assembly of the fixing mechanism comprises a sleeve, a first support column, and a second support column, wherein one end of the first support column is mounted on the base, the second end of the first support column is mounted in the outer shell, the first end of the second support column is mounted in the sleeve, the sleeve is mounted in the outer shell and is located at the clamping position of the clamping member, and the second end of the second support column is used to be fixed to the workpiece.

[0019] The technical solution provided by the utility model has the following advantages and effects:

[0020] 1. A first transmission rod and a second transmission rod are mounted on each end of the clamping member, and the ends of the drive assembly cooperate with the first and second transmission rods. The drive assembly is used to drive the first and second transmission rods to swing, so that the first and second transmission rods drive the ends of the clamping member, enabling the clamping member to clamp and abut against a workpiece or support the component. By using the drive assembly to drive the clamping member, the two abutment blocks on the clamping member move, thereby improving the adjustment efficiency of the fixing mechanism and improving the low adjustment efficiency of existing fixing mechanisms.

[0021] 2. A first drive block and a second drive block are respectively sleeved onto the ends of the screw, and the first and second drive blocks are respectively mounted on the first and second transmission rods. When adjusting the clamping member, the screw is rotated, and the first and second drive blocks are respectively constrained by the first and second transmission rods, so that the first and second drive blocks can only move along the length of the screw. This screw is used to drive the first and second drive blocks away from or towards each other. When the first and second drive blocks move towards each other, the clamping member opens; when the first and second drive blocks move away from each other, the clamping member closes, further improving the adjustment efficiency of the fixing mechanism.

[0022] 3. By using the first external thread to cooperate with the first internal thread, and the second external thread to cooperate with the second internal thread, the screw can further drive the first driving block and the second driving block to move at the same time.

[0023] 4. By making the thread directions of the first external thread and the second thread opposite, and the thread directions of the first internal thread and the second internal thread opposite, it is ensured that when the screw rotates, the movement directions of the first drive block and the second drive block are opposite; when the screw rotates clockwise, the first drive block and the second drive block are driven away from each other; when the screw rotates counterclockwise, the first drive block and the second drive block are driven towards each other.

[0024] 5. The clamping member includes a first abutment block and a second abutment block. The first transmission rod and the second transmission rod are used to transmit the power of the first driving block and the second driving block, and drive the first abutment block and the second abutment block to move away from or approach each other, adjust the size of the clamping position, and realize the clamping support assembly.

[0025] 6. The support assembly is installed in the outer shell, and the first abutment block and the second abutment block are used to fix the support assembly; the first abutment block and the second abutment block are staggered in the circumferential direction of the support assembly, so that the first abutment block and the second abutment block abut against the support assembly in different directions of the support assembly, thereby improving the stability of the support assembly after fixation.

[0026] 7. When the first transmission rod and the second transmission rod drive the pushing part to move, the pushing part can rotate around the pin shaft, so that the pushing part can rotate and cooperate with the first transmission rod and the second transmission rod through the pin shaft. The pushing part can adaptively move in the outer shell through the flexibility of its own rotation, avoiding the phenomenon of movement obstruction, and further improving the sliding passability of the first abutment block and the second abutment block in the outer shell.

[0027] 8. The first connecting rod is used to connect with the first driving block or the second driving block, limit the rotation of the first driving block or the second driving block, and transmit the power of the first driving block and the second driving block to the second connecting rod. The second connecting rod is used to push the first abutting block or the second abutting block to move, thereby achieving abutment or clamping of the support assembly; moreover, the first transmission rod or the second transmission rod rotates with the outer shell through the rotating shaft, so that the first transmission rod presents a lever-type structure in the outer shell, saving the force of driving the first abutting block or the second abutting block, making the fixing mechanism more convenient to operate.

[0028] 9. The length of the first connecting rod is greater than that of the second connecting rod, so that the torque of the first connecting rod is longer, further saving the force of pushing the second connecting rod; the volume of the first connecting rod is greater than that of the second connecting rod. The first connecting rod has a larger volume and can be used to be sleeved on the outside of the first driving block or the second driving block. The layout of the first connecting rod and the first driving block or the second driving block in the shell is more compact, making the fixing mechanism more miniaturized.

[0029] 10. Apply a fixing mechanism to the clamping device so that the workpiece is fixed through the support assembly. The first support column is used to fix to the base, and the second support column is used to fix to the workpiece. When in use, multiple identical fixing mechanisms can be spliced ​​and assembled to increase the clamping height of the workpiece. Moreover, by using this fixing mechanism to clamp the workpiece, the four sides and the top surface of the workpiece can be processed, and its processing range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein illustrate specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0031] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0032] FIG1 is a schematic diagram of a fixing mechanism in an embodiment of the present invention;

[0033] FIG2 is a second schematic diagram of a fixing mechanism in an embodiment of the present invention;

[0034] FIG3 is a cross-sectional view of a fixing mechanism in one embodiment of the present invention;

[0035] FIG4 is a schematic internal diagram of a fixing mechanism in one embodiment of the present invention;

[0036] FIG5 is a schematic diagram of a drive assembly in an embodiment of the present invention;

[0037] 6 is a schematic diagram of the connection between the first abutment block, the first transmission rod, and the first driving block in one embodiment of the present invention;

[0038] FIG7 is a schematic diagram of a first abutment block in an embodiment of the present invention;

[0039] FIG8 is a schematic diagram of a clamping device in one embodiment of the present invention;

[0040] Explanation of the accompanying drawings: 100, fixing mechanism; 1, housing; 2, clamping member; 21, first abutting block; 211, abutting portion; 212, pushing portion; 213, U-shaped groove; 214, pin shaft; 22, second abutting block; 3, driving assembly; 31, screw rod; 311, first external thread; 312, second external thread; 313, adjusting hole; 32, first driving block; 33, second driving block; 34, fixing seat; 35, positioning pin; 4, transmission member; 41, first transmission rod; 411, first connecting rod; 412, second connecting rod; 413, mounting groove; 42, second transmission rod; 43, rotating shaft; 44, pin hole; 5, supporting assembly; 51, sleeve; 52, first support column; 53, second support column; 200, clamping device. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0042] Unless otherwise specified or defined, the "first, second..." used in this article is only used to distinguish names and does not represent a specific quantity or order.

[0043] Unless stated otherwise or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element. When an element is considered to be "located on" another element, it can be directly located on the other element or there can be an intermediate element.

[0045] As shown in Figures 1 to 5, a fixing mechanism 100 includes a housing 1, a clamping member 2 and a transmission member 4 installed in the housing 1, and a drive assembly 3 rotatably installed in the housing 1, wherein the transmission member 4 includes a first transmission rod 41 and a second transmission rod 42, wherein the first ends of the first transmission rod 41 and the second transmission rod 42 are respectively installed at the two ends of the clamping member 2, and the two ends of the drive assembly 3 respectively cooperate with the second ends of the first transmission rod 41 and the second transmission rod 42. The first transmission rod 41 and the second transmission rod 42 are respectively installed at the two ends of the clamping member 2, and the two ends of the drive assembly 3 respectively cooperate with the first transmission rod 41 and the second transmission rod 42. The drive assembly 3 is used to drive the first transmission rod 41 and the second transmission rod 42 to swing, so that the first transmission rod 41 and the second transmission rod 42 drive the two ends of the clamping member 2, and enable the clamping member 2 to clamp and abut the workpiece 202 or the support assembly 5. By using the driving assembly 3 to drive the clamping member 2, the first abutting block 21 and the second abutting block 22 on the clamping member 2 move simultaneously, thereby improving the adjustment efficiency of the fixing mechanism 100 and improving the problem of low adjustment efficiency in the existing fixing mechanism 100.

[0046] As shown in Figures 4 and 5, the drive assembly 3 includes a screw rod 31, a first drive block 32, and a second drive block 33. The first drive block 32 is sleeved on the first end of the screw rod 31 and mounted on the first transmission rod 41. The second drive block 33 is sleeved on the second end of the screw rod 31 and mounted on the second transmission rod 42. The first and second ends of the screw rod 31 are respectively threadedly engaged with the first and second drive blocks 32, 33. The first and second drive blocks 32, 33 are sleeved on both ends of the screw rod 31, and the first and second drive blocks 32, 33 are respectively mounted on the first and second transmission rods 41, 42. When adjusting the clamping member 2, the screw rod 31 is rotated, and the first and second drive blocks 32, 33 are respectively restricted by the first and second transmission rods 41, 42, so that the first and second drive blocks 32, 33 can only move along the length of the screw rod 31. This screw 31 is used to drive the first drive block 32 and the second drive block 33 toward or away from each other. When the first drive block 32 and the second drive block 33 move toward each other, the clamping member 2 opens; when the first drive block 32 and the second drive block 33 move away from each other, the clamping member 2 closes, further improving the adjustment efficiency of the fixing mechanism 100. After the screw 31 is installed in the housing 1, a fixing base 34 is installed outside the screw 31. The fixing base 34 is fixed to the housing 1 via a positioning pin 35, thereby defining the position of the screw 31 in the housing 1.

[0047] As shown in Figures 4 and 5, the ends of the screw 31 have a first external thread 311 and a second external thread 312, respectively. The first drive block 32 has a first internal thread, and the second drive block 33 has a second internal thread. The first external thread 311 mates with the first internal thread, and the second external thread 312 mates with the second internal thread. By mate-ing the first external thread 311 with the first internal thread, and the second external thread 312 with the second internal thread, the screw 31 simultaneously drives the first and second drive blocks 32, 33 to move. In this embodiment, the ends of the screw 31 have adjustment holes 313, into which a tool is inserted to drive the screw 31 to rotate.

[0048] As shown in Figure 5, the first external thread 311 has an opposite thread direction to the second external thread 312, and the first internal thread has an opposite thread direction to the second internal thread. This ensures that when the screw 31 rotates, the first drive block 32 and the second drive block 33 move in opposite directions. Clockwise rotation of the screw 31 drives the first drive block 32 and the second drive block 33 away from each other; counterclockwise rotation of the screw 31 drives the first drive block 32 and the second drive block 33 toward each other.

[0049] As shown in FIG4 , the clamping member 2 includes a first abutting block 21 and a second abutting block 22. The first end of the first abutting block 21 is mounted on a first transmission rod 41, and the first end of the second abutting block 22 is mounted on a second transmission rod 42. A clamping position is formed between the second end of the first abutting block 21 and the second end of the second abutting block 22. The first transmission rod 41 and the second transmission rod 42 are used to transmit power from the first drive block 32 and the second drive block 33, and drive the first abutting block 21 and the second abutting block 22 away from or towards each other, thereby adjusting the size of the clamping position and achieving the clamping support assembly 5.

[0050] As shown in Figures 1 to 4, the fixing mechanism 100 further includes a support assembly 5, which is installed in the housing 1 and is at least partially located in the clamping position; the first abutment block 21 and the second abutment block 22 are staggered in the circumferential direction of the support assembly 5, and the first abutment block 21 and the second abutment block 22 are both used to abut against the support assembly 5. The support assembly 5 is installed in the housing 1, and the first abutment block 21 and the second abutment block 22 are used to fix the support assembly 5; the first abutment block 21 and the second abutment block 22 are staggered in the circumferential direction of the support assembly 5, so that the first abutment block 21 and the second abutment block 22 abut against the support assembly 5 in different directions of the support assembly 5, thereby improving the stability of the support assembly 5 after it is fixed.

[0051] As shown in Figures 6 and 7, the first abutment block 21 or the second abutment block 22 includes an abutment portion 211, a pushing portion 212, and a pin shaft 214. The abutment portion 211 and the pushing portion 212 are an integrated structure. The pushing portion 212 slides with the inner wall of the outer shell 1. A U-shaped groove 213 is provided on one side of the pushing portion 212, and the pin shaft 214 is installed in the U-shaped groove 213; the first transmission rod 41 or the second transmission rod 42 is provided with a pin hole 44, and the pin hole 44 is for the pin shaft 214 to pass through, so that the pushing portion 212 can rotate with the first transmission rod 41 or the second transmission rod 42 through the pin shaft 214. When the first transmission rod 41 and the second transmission rod 42 drive the pushing portion 212 to move, the pushing portion 212 can rotate around the pin shaft 214, so that the pushing portion 212 can rotate and cooperate with the first transmission rod 41 and the second transmission rod 42 through the pin shaft 214. The pushing portion 212 can adaptively move in the outer shell 1 through the flexibility of its own rotation, avoiding the phenomenon of movement obstruction, and further improving the sliding passability of the first abutment block 21 and the second abutment block 22 in the outer shell 1.

[0052] As shown in Figures 1, 2 and 5, the first transmission rod 41 or the second transmission rod 42 includes a first connecting rod 411, a second connecting rod 412, and a rotating shaft 43. The first connecting rod 411 and the second connecting rod 412 are an integrated structure. The connection between the first connecting rod 411 and the second connecting rod 412 has an axial hole. The two ends of the rotating shaft 43 are respectively installed on the outer shell 1 and the axial hole. The first transmission rod 41 or the second transmission rod 42 rotates with the outer shell 1 through the rotating shaft 43. The first connecting rod 411 is used to connect with the first driving block 32 or the second driving block 33, and limit the rotation of the first driving block 32 or the second driving block 33, and transmit the power of the first driving block 32 and the second driving block 33 to the second connecting rod 412. The second connecting rod 412 is used to push the first abutment block 21 or the second abutment block 22 to move, thereby achieving abutment or clamping of the support assembly 5; moreover, the first transmission rod 41 or the second transmission rod 42 rotates with the outer shell 1 through the rotating shaft 43, so that the first transmission rod 41 is a lever-type structure in the outer shell 1, saving the force of driving the first abutment block 21 or the second abutment block 22, making the fixing mechanism 100 more convenient to operate.

[0053] As shown in Figure 5, the length of the first connecting rod 411 is greater than the length of the second connecting rod 412, so that the torque of the first connecting rod 411 is longer, further saving the force of pushing the second connecting rod 412; the volume of the first connecting rod 411 is greater than the volume of the second connecting rod 412. The volume of the first connecting rod 411 is large, and an installation groove 413 can be set in the first connecting rod 411. The installation groove 413 is used to accommodate the installation of the first driving block 32 or the second driving block 33. The layout of the first connecting rod 411 and the first driving block 32 or the second driving block 33 in the housing 1 is more compact, making the fixing mechanism 100 more miniaturized.

[0054] As shown in Figure 8, the utility model also proposes a clamping device 200, including a base 201 and at least one fixing mechanism 100 as described above, the support assembly 5 of the fixing mechanism 100 includes a sleeve 51, a first support column 52, and a second support column 53, one end of the first support column 52 is installed on the base 201, the second end of the first support column 52 is installed in the shell 1, the first end of the second support column 53 is installed in the sleeve 51, the sleeve 51 is installed in the shell 1, and is located at the clamping position of the clamping member 2, and the second end of the second support column 53 is used to be fixed to the workpiece 202. The fixing mechanism 100 is applied to the clamping device 200, so that the workpiece 202 is fixed through the support assembly 5, the first support column 52 is used to be fixed to the base 201, and the second support column 53 is used to be fixed to the workpiece 202; when in use, multiple identical fixing mechanisms 100 can be spliced ​​and assembled to increase the clamping height of the workpiece 202. Moreover, by using this fixing mechanism 100 to clamp the workpiece, the four sides and the top surface of the workpiece 202 can be processed, and its processing range is wider.

[0055] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quoting of drawings which would result in less concise descriptions, features that have been described clearly will not be quoted from the drawings one by one.

[0056] The purpose of the above embodiments is to exemplify and deduce the technical solution of the utility model, and to fully describe the technical solution, purpose and effect of the utility model. Its purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of the utility model, and it does not limit the scope of protection of the utility model.

[0057] The above embodiments are not exhaustive of the present invention, and there may be many other embodiments not listed. Any replacements and improvements made without violating the concept of the present invention are within the scope of protection of the present invention.

Claims

1. A fixing mechanism, characterized in that: It includes a shell, a clamping member and a transmission member installed in the shell, and a drive assembly rotatably installed in the shell, the transmission member includes a first transmission rod and a second transmission rod, the first ends of the first transmission rod and the second transmission rod are respectively installed at the two ends of the clamping member, and the two ends of the drive assembly are respectively matched with the second ends of the first transmission rod and the second transmission rod.

2. The fixing mechanism according to claim 1, wherein: The drive assembly includes a screw, a first drive block and a second drive block. The first drive block is sleeved on the first end of the screw and installed on the first transmission rod. The second drive block is sleeved on the second end of the screw and installed on the second transmission rod. The first end and the second end of the screw are respectively threadedly engaged with the first drive block and the second drive block.

3. The fixing mechanism according to claim 2, wherein: The two ends of the screw rod respectively have a first external thread and a second external thread, the first driving block has a first internal thread, the second driving block has a second internal thread, the first external thread is threadedly matched with the first internal thread, and the second external thread is threadedly matched with the second internal thread.

4. The fixing mechanism according to claim 3, wherein: The thread direction of the first external thread is opposite to that of the second external thread, and the thread direction of the first internal thread is opposite to that of the second internal thread.

5. The fixing mechanism according to claim 1, wherein: The clamping member includes a first abutment block and a second abutment block, the first end of the first abutment block is installed on the first transmission rod, the first end of the second abutment block is installed on the second transmission rod, and a clamping position is formed between the second end of the first abutment block and the second end of the second abutment block.

6. The fixing mechanism according to claim 5, wherein: The fixing mechanism also includes a support assembly, which is installed in the shell and is at least partially located in the clamping position; the first abutment block and the second abutment block are staggered in the circumferential direction of the support assembly, and the first abutment block and the second abutment block are both used to abut against the support assembly.

7. The fixing mechanism according to claim 6, wherein: The first abutting block or the second abutting block includes an abutting portion, a pushing portion, and a pin shaft. The abutting portion and the pushing portion are an integrated structure. The pushing portion is slidably engaged with the inner wall of the shell. A U-shaped groove is provided on one side of the pushing portion, and the pin shaft is installed in the U-shaped groove. The first transmission rod or the second transmission rod is provided with a pin hole, and the pin hole is for a pin shaft to pass through, so that the pushing part is rotationally matched with the first transmission rod or the second transmission rod through the pin shaft.

8. The fixing mechanism according to any one of claims 1 to 7, wherein: The first transmission rod or the second transmission rod includes a first connecting rod, a second connecting rod, and a rotating shaft. The first connecting rod and the second connecting rod are an integrated structure. The connection between the first connecting rod and the second connecting rod has an axial hole. The two ends of the rotating shaft are respectively installed on the outer shell and the axial hole. The first transmission rod or the second transmission rod rotates with the outer shell through the rotating shaft.

9. The fixing mechanism according to claim 8, wherein: The length of the first connecting rod is greater than that of the second connecting rod, and the volume of the first connecting rod is greater than that of the second connecting rod.

10. The clamping device is characterized in that: It includes a base and at least one fixing mechanism according to any one of claims 1 to 9, the supporting assembly of the fixing mechanism includes a sleeve, a first support column, and a second support column, one end of the first support column is installed on the base, the second end of the first support column is installed in the shell, the first end of the second support column is installed in the sleeve, the sleeve is installed in the shell and is located at the clamping position of the clamping member, and the second end of the second support column is used to be fixed to the workpiece.

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