Clamping components and clamping devices

Abstract

This invention provides a clamping device and its clamping assembly. The clamping assembly includes a knob, a screw, and a pressure plate, with the knob and pressure plate respectively located at both ends of the screw. The side of the pressure plate opposite to the screw is recessed inward to form a cavity. A clamping block is installed in the cavity, and the clamping block includes a mounting part and a clamping part. The mounting part is located in the cavity, and the clamping part protrudes along the axial direction of the screw from the end wall of the pressure plate opposite to the screw in a direction away from the screw. A clearance groove is provided on the inner wall of the cavity. The clearance groove is recessed from the inner circumferential wall of the pressure plate radially. The clearance groove extends circumferentially along the pressure plate. Multiple clearance grooves are arranged at intervals along the axial direction of the screw. Along the axial direction of the pressure plate, the cross-sectional area of ​​the cavity gradually increases from the end of the pressure plate near the knob to the end away from the knob. This invention can reduce the risk of clamping block breakage and improve the service life of the clamping block.

Description

Technical Field

[0001] This invention relates to the field of clamps, and more particularly to a clamping assembly and clamping device. Background Technology

[0002] Fixtures are generally used to fix objects so that they are installed in the correct position. Any device used to quickly, conveniently and safely install objects can be called a fixture; for example, welding fixtures, inspection fixtures, assembly fixtures, machine tool fixtures, etc. According to their usage characteristics, fixtures can be divided into universal fixtures, special fixtures, adjustable fixtures and combination fixtures.

[0003] An existing clamping device includes a knob, a screw, and a pressure plate. The pressure plate is located at the first end of the screw, and the knob is located at the second end of the screw. A clamping block is located on the side of the pressure plate away from the screw. A mounting groove is provided on the side wall of the pressure plate connecting to the screw, and a bearing is installed in the mounting groove. The first end of the screw is installed in the bearing. However, in this existing design, the clamping block is easily deformed outwards under pressure during clamping. Due to excessive deformation, the clamping block is prone to breakage, shortening its service life. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the first objective of the present invention is to provide a clamping assembly that can reduce the risk of cracking of the clamping block and improve the service life of the clamping block.

[0005] A second objective of the present invention is to provide a clamping device including the above-described clamping components.

[0006] To achieve the aforementioned first objective, the clamping assembly provided by the present invention includes a knob, a screw, and a pressure plate. The knob and the pressure plate are respectively disposed at both ends of the screw. The side of the pressure plate away from the screw is recessed inward to form a cavity. A clamping rubber block is installed in the cavity. The clamping rubber block includes an mounting part and a clamping part. The mounting part is located in the cavity. The clamping part protrudes along the axial direction of the screw from the end wall of the pressure plate away from the screw in a direction away from the screw. An anti-cavity groove is provided on the inner wall of the cavity.

[0007] As can be seen from the above, the cavity and the anti-cavity groove on the side wall of the cavity are designed to allow the compressed rubber block to be squeezed into the anti-cavity groove on the side wall of the cavity during the compression process, thereby reducing the outward deformation and reducing the risk of the compressed rubber block breaking due to excessive deformation over a long period of time.

[0008] A further solution is to have the clearance groove recessed radially from the inner circumferential wall of the pressure plate.

[0009] A further option is to extend the clearance groove along the circumference of the pressure plate.

[0010] As can be seen from the above, the vent groove extends circumferentially along the pressure plate, which makes the deformation of the pressing rubber block uniformly reduced.

[0011] A further option is to arrange multiple clearance slots at intervals along the axial direction of the screw.

[0012] As can be seen from the above, increasing the number of clearance grooves can further reduce the deformation of the clamping block and reduce the risk of breakage.

[0013] A further approach is to gradually increase the cross-sectional area of ​​the cavity along the axial direction of the pressure plate, from the end of the pressure plate closest to the knob to the end furthest from the knob.

[0014] As can be seen from the above, the cross-sectional area of ​​the cavity gradually increases, which increases the contact area between the cavity sidewall and the pressing rubber block, thus enhancing the pressing effect.

[0015] A further option is to allow the pressure plate to rotate circumferentially along the screw.

[0016] As can be seen above, the pressure plate is rotatably connected to the second end of the screw along the axial direction, so that the pressure pad will not rotate with the screw, thus preventing the surface of the pressure pad from wearing.

[0017] A further embodiment is that the second end of the screw is provided with a slide rod extending along the axial direction of the screw, the diameter of the slide rod being smaller than the diameter of the screw. The bottom wall of the cavity is provided with a first through hole extending along the axial direction of the screw. The pressure plate is fitted onto the slide rod through the first through hole and can rotate around the central axis of the slide rod. The end wall of the slide rod is provided with a threaded hole, in which a bolt is installed. The bolt head is located in the cavity. The bolt head and the screw cause the pressure plate to be positioned at the upper limit of the axial direction of the slide rod.

[0018] As can be seen from the above, the slide bar and the bolt in the threaded hole of the slide bar at the second end of the screw allow the screw to rotate relative to the pressure plate. At the same time, the bolt can prevent the screw from dislodging from the pressure plate. This solution has a simple structure, low cost, and is easy to disassemble and replace.

[0019] A further design involves providing a boss on the bottom wall of the cavity, with the boss protruding from the bottom wall of the pressure plate away from the screw along the axial direction of the screw. A first through hole penetrates the boss, and the diameter of the bolt head is smaller than the outer diameter of the boss. A second through hole is provided in the compression block, with the boss extending into the second through hole and having an interference fit with the second through hole.

[0020] As can be seen from the above, the second through hole allows the pressing rubber block to deform towards the center of the through hole, reducing the outward deformation. At the same time, the interference fit between the second through hole and the boss facilitates disassembly and assembly.

[0021] A further option is to make the outer diameter of the clamping part equal to the outer diameter of the end wall of the pressure plate furthest from the knob.

[0022] As can be seen from the above, the pressing part of the pressing block is equal to the maximum outer diameter of the pressure plate, which can increase the contact area with the object to be fixed and can fully fix the object to be fixed.

[0023] To achieve the second objective mentioned above, the clamping device provided in this solution includes any of the aforementioned clamping components.

[0024] In summary, the clamping device of the present invention has a good clamping effect, can reduce the risk of clamping pad breakage, and improve the service life of the clamping device. It also has a simple structure, low cost, and is easy to disassemble and replace. Attached Figure Description

[0025] Figure 1 This is a perspective view of an ultrasonic welding machine according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the internal structure of the ultrasonic welding machine according to an embodiment of the present invention.

[0027] Figure 3 This is an exploded view of the head assembly, head drive mechanism, and column according to an embodiment of the present invention.

[0028] Figure 4 This is a structural diagram of the oscillating cylinder assembly and the lifting bracket according to the first embodiment of the present invention.

[0029] Figure 5 This is an exploded view of the oscillating cylinder assembly and the lifting bracket according to the first embodiment of the present invention.

[0030] Figure 6 This is an exploded view of the deceleration switch, ultrasonic switch, and stop member according to the first embodiment of the present invention.

[0031] Figure 7 This is a top view of the deceleration switch, ultrasonic switch, and stop member according to the first embodiment of the present invention.

[0032] Figure 8 This is a structural diagram of the oscillating cylinder assembly and the lifting bracket according to the second embodiment of the present invention.

[0033] Figure 9 This is a top view of the deceleration switch, ultrasonic switch, and stop member according to the second embodiment of the present invention.

[0034] Figure 10 This is a cross-sectional view of the lifting bracket and fine-tuning rod assembly according to the first embodiment of the present invention.

[0035] Figure 11 for Figure 10 Enlarged view of point A in the middle.

[0036] Figure 12 This is an exploded view of the fine-tuning lever assembly according to the first embodiment of the present invention.

[0037] Figure 13 This is an exploded view of the ultrasonic welding machine electrical box support, electrical box, and lower-level machine according to an embodiment of the present invention.

[0038] Figure 14 This is an exploded view of the clamping assembly according to an embodiment of the present invention.

[0039] Figure 15 This is a cross-sectional view of the clamping assembly according to an embodiment of the present invention.

[0040] Figure 16 for Figure 15 Enlarged view of point B in the middle. Detailed Implementation

[0041] First embodiment of the speed reduction switch, ultrasonic switch, and ultrasonic welding machine:

[0042] See Figures 1 to 3 The ultrasonic welding machine of this embodiment includes a head assembly 4, a base 1, and a head drive mechanism 3. A column 2 is provided on the base 1. Guide rails 20 extending in the Z direction are spaced apart on one side wall of the column 2. A connecting slider 64 and a locking device 65 are provided on the side of the head assembly 4 near the column 2. When the locking device 65 is used to hold the guide rail 20, the head assembly 4 cannot move. The head assembly 4 is connected to the guide rail 20 through the connecting slider 64. The head drive mechanism 3 includes a motor 31 and an adjusting screw 30. The head assembly 4 is connected to the adjusting screw 30 through a screw connecting arm 63. The motor 31 drives the adjusting screw 30 to rotate, so that the head assembly 4 moves on the guide rail 20 in the Z direction.

[0043] The head assembly 4 includes a main control circuit (not shown in the figure), a lifting bracket 6, and a buffer mechanism 8. The lifting bracket 6 is equipped with a fine-tuning stroke assembly 9, a oscillator drive mechanism 7, and an oscillator assembly 5. A slide rail 50 is installed on the side wall of the oscillator assembly 5 near the lifting bracket 6. Figure 5 (As shown), a slider 67 is installed on the lifting bracket 6, and the slider 67 is connected to the slide rail 50. The oscillator drive mechanism 7, the oscillator assembly 5, and the buffer mechanism 8 are all electrically connected to the main control circuit. The buffer mechanism 8 is connected to the oscillator drive mechanism 7, and the oscillator drive mechanism 7 drives the oscillator assembly 5 to move relative to the lifting bracket 6 in the Z direction.

[0044] See Figure 4The fine-tuning stroke assembly 9 includes a fine-tuning rod assembly and a stop 94. The fine-tuning rod assembly includes a fine-tuning screw and a fine-tuning knob assembly. The lifting bracket 6 is provided with a mounting cavity 60. The lifting bracket 60 includes a first mounting cavity sidewall 61 and a second mounting cavity sidewall 62 that are perpendicularly connected to each other. The first mounting cavity sidewall 61 extends along the Z direction and has two sliding grooves 66 extending along the Z direction. The second mounting cavity sidewall 62 extends from the first mounting cavity sidewall 61 to the column 2 along the Y direction. The oscillator assembly 5 is installed on the side of the first mounting cavity sidewall 61 away from the mounting cavity 60.

[0045] The stop 94 slides into the groove 66. The first end of the stop 94 is mounted on the oscillating cylinder assembly 5, and the second end of the stop 94 passes through the groove along the Y direction and extends into the mounting cavity 60. The fine-tuning screw is mounted on the side wall 62 of the second mounting cavity. A limiting pad 90 is also provided on the fine-tuning screw. The limiting pad 90 is located in the mounting cavity 90. The fine-tuning knob assembly is located at the end of the fine-tuning screw away from the mounting cavity 60. The surface of the limiting pad 90 facing away from the side wall 62 of the second mounting cavity is the limiting part. The stop 94 and the limiting part of the limiting pad 90 are arranged opposite each other in the Z direction. The stop 94 and the limiting part of the limiting pad 94 cooperate to limit the displacement of the oscillating cylinder assembly 5 relative to the lifting bracket 6 in the Z direction. The limiting pad 90 is arranged close to the side wall 62 of the second mounting cavity relative to the stop 94.

[0046] The stop component 94 is equipped with a deceleration switch 942 and an ultrasonic switch 944, and the fine-tuning rod assembly is also equipped with a trigger unit. The deceleration switch 942 is electrically connected to the buffer mechanism 8, and the ultrasonic switch 944 is connected to the main control circuit. The trigger unit sequentially triggers the deceleration switch and the ultrasonic switch to start the buffer mechanism and the ultrasonic wave.

[0047] Optionally, a stop can be mounted on a fine-tuning screw, which passes through a limit seat (not shown in the figure) and a fixed seat (not shown in the figure). The limit seat is detachably connected to the lifting bracket, and the fixed seat is detachably connected to the oscillating cylinder assembly. The fine-tuning screw can move relative to the limit seat in the Z direction. The fine-tuning screw and the fixed seat are rotatably connected, with the fine-tuning screw and the fixed seat in an upper limit engagement in the Z direction. Rotating the fine-tuning knob assembly rotates the fine-tuning screw, and the stop moves relative to the fine-tuning screw in the Z direction, adjusting the descent stroke of the oscillating cylinder assembly. During operation, when the stop abuts against the upper surface of the limit seat, the oscillating cylinder drive mechanism 7 stops working.

[0048] See Figures 4 to 7 and combined Figure 10The first end of the fine-tuning screw is provided with a positioning post 91 extending along the Z direction. The trigger part is located at the upper end of the positioning post 91. The fine-tuning knob assembly is located at the second end of the fine-tuning screw. The positioning post 91 is made of metal and is integrally formed with the fine-tuning screw. The limiting pad 90 is located between the positioning post 91 and the fine-tuning rod assembly. The limiting pad 90 is sleeved on the outside of the positioning post 91 and is detachably fixed to the fine-tuning screw by means of a threaded connection.

[0049] A mounting bracket 940 is provided on the side of the stop 94 away from the limiting pad 90. The deceleration switch 942 and the ultrasonic switch 944 are spaced apart along the Z direction on the side of the mounting bracket 941 away from the stop 94. An isolation pad 943 is provided between the deceleration switch 942 and the ultrasonic switch 944. Both the deceleration switch 942 and the ultrasonic switch 944 are proximity switches. The deceleration switch 942 is closer to the stop 94 than the ultrasonic switch 944.

[0050] The stop 94 has a first limiting hole 940, the mounting bracket 941 has a second limiting hole 9410, the isolation pad 943 has a third limiting hole 9430, the deceleration switch 942 has a first sensing hole 9420, and the ultrasonic switch 944 has a second sensing hole 9440. The first sensing hole 9420, the second sensing hole 9440, the first limiting hole 940, the second limiting hole 9410, the third limiting hole 9430, and the positioning post 91 are arranged coaxially. The diameter of the first limiting hole 940 is smaller than the diameter of the limiting pad 90, so that the stop 94 can abut against the limiting pad 90. During operation, the oscillator drive mechanism 7 drives the oscillator assembly 5 to descend along the Z direction. The first sensing hole 9420, the second sensing hole 9440, and the three limiting holes can move along the Z direction, allowing the positioning post 91 to pass through the first sensing hole 9420 and the second sensing hole 9440 in sequence.

[0051] The working method of this embodiment includes the following steps:

[0052] Step 1: The head drive mechanism 3 drives the head assembly 4 to descend along the Z direction to the first preset position.

[0053] Step 2: The oscillator drive mechanism 7 drives the oscillator assembly 5 to move along the Z direction to approach the object to be welded (not shown in the figure).

[0054] Step 3: When the trigger part on the positioning post 91 passes through the first sensing hole 9420, the buffer mechanism 8 controls the cylinder exhaust direction of the oscillator drive mechanism 7 to reverse, so that the oscillator assembly 5 decelerates and approaches the workpiece to be welded.

[0055] Step 4: The vibrating cylinder assembly 5 continues to move, and when the trigger part on the positioning column 91 passes through the second sensing hole 9440, the ultrasonic wave is activated.

[0056] Step 5: The oscillator assembly 5 continues to move. When the stop 94 abuts against the limit pad 90, the oscillator drive mechanism 7 stops working.

[0057] Step 6: Welding completed, the oscillator assembly 5 returns to the first preset position.

[0058] When welding the same products in large quantities, steps two through six above can be repeated to achieve automated production and improve production efficiency.

[0059] A second embodiment of the deceleration switch, ultrasonic switch, and ultrasonic welding machine:

[0060] See Figure 8 and Figure 9 In this embodiment, both the deceleration switch 942 and the ultrasonic switch 944 are proximity switches. The triggering part is the surface of the limiting pad 90 facing the stop member. The deceleration switch 942 and the ultrasonic switch 944 are arranged alternately along the X direction, and both are inserted into the stop member 94. Both the deceleration switch 942 and the ultrasonic switch 944 are positioned opposite the triggering part on the limiting pad 90 in the Z direction. The ultrasonic switch 944 and the deceleration switch 942 each have an ultrasonic sensing distance and a deceleration sensing distance.

[0061] The working method of this embodiment includes the following steps:

[0062] Step 1: The head drive mechanism 3 drives the head assembly 4 to descend along the Z direction to the first preset position.

[0063] Step 2: The oscillator drive mechanism 7 drives the oscillator assembly 5 to move along the Z direction to approach the object to be welded (not shown in the figure).

[0064] Step 3: When the distance between the deceleration switch 942 and the trigger part on the limit pad 90 meets the deceleration sensing distance, the buffer mechanism 8 controls the cylinder exhaust reversal of the oscillator drive mechanism 7, so that the oscillator assembly 5 decelerates and descends.

[0065] Step 4: The vibrating cylinder assembly 5 continues to move. When the distance between the ultrasonic switch 944 and the limit pad 90 meets the ultrasonic sensing distance, the ultrasonic wave is activated.

[0066] Step 5: The oscillator assembly 5 continues to move. When the stop 94 abuts against the limit pad 90, the oscillator drive mechanism 7 stops working.

[0067] Step 6: Welding completed, the oscillator assembly 5 returns to the first preset position.

[0068] When welding the same products in large quantities, steps two through six above can be repeated to achieve automated production and improve production efficiency.

[0069] Alternatively, the deceleration switch 942 and the ultrasonic switch 944 can be existing switches such as microswitches.

[0070] See Figures 10 to 12 In this embodiment, a connecting hole 620 extending along the Z direction is provided on the side wall 62 of the second mounting cavity. A fine-tuning mounting seat 95 is detachably installed in the connecting hole 620. A threaded hole 950 is formed in the center of the fine-tuning mounting seat 95. The fine-tuning screw includes a screw part 96 and a sliding part 97 connected along the axial direction of the fine-tuning screw. A limiting pad 90 is provided at the end of the screw part 96 away from the sliding part 97. The screw part 96 is threadedly connected to the threaded hole 950.

[0071] The fine-tuning knob assembly includes a fine-tuning knob 93 and a locking component 92. The fine-tuning knob 93 is located at the end of the slide rod 97 away from the lead screw 96. The fine-tuning knob 93 is detachably fixedly connected to the slide rod 97. The locking component 92 is sleeved on the outside of the lead screw 96 and threadedly connected to the lead screw 96. The locking component 92 can move along the axial direction of the fine-tuning lead screw relative to the fine-tuning knob 93.

[0072] The locking component 92 includes a locking sleeve 920 and a locking knob 921 connected axially. A mounting cavity 932 is formed within the fine-tuning knob 93. The locking sleeve 920 is disposed within the mounting cavity, and the locking knob is located outside the mounting cavity 932 and axially positioned between the fine-tuning knob 93 and the second mounting cavity sidewall 62. A first scale line 922 is provided on the outer peripheral wall of the locking sleeve 920, arranged axially. The locking knob 93 is movable relative to the second mounting cavity sidewall 62 in the Z direction to abut against the lower surface of the second mounting cavity sidewall 62.

[0073] The fine-tuning mounting base 95 includes a first mounting portion 952 and a second mounting portion 953 connected axially along the fine-tuning screw. The first mounting portion 952 abuts against the surface of the side wall 62 of the second mounting cavity of the lifting bracket opposite to the fine-tuning knob assembly. The second mounting portion 953 passes through the connecting hole 620. The first mounting portion 952 has two first mounting holes 951 spaced apart, and the side wall 62 of the second mounting cavity has two corresponding second mounting holes (not shown in the figure). Fasteners are used to pass through the first mounting holes 951 and the second mounting holes to fix the fine-tuning mounting base 95 onto the side wall of the second mounting cavity. The fine-tuning mounting base facilitates the use of connecting holes of various diameters.

[0074] The fine adjustment knob 93 has a sloping platform 930 extending circumferentially along the side of the lifting bracket 6. Along the axis of the fine adjustment screw, the outer diameter of the sloping platform 930 gradually increases from the end of the fine adjustment knob 93 toward the side wall 62 of the second mounting cavity. The outer surface of the sloping platform 930 is provided with a second scale line 931 arranged circumferentially along the fine adjustment knob 93.

[0075] Alternatively, the connecting hole 620 can be a threaded hole, and the lead screw 96 can be directly threaded into the connecting hole 620.

[0076] A countersunk hole 98 is provided on the upper surface of the locking component 92 near the side wall 62 of the second mounting cavity. The countersunk hole 98 and the fine-tuning mounting seat 95 are arranged opposite each other along the axial direction of the locking component 92. The diameter of the countersunk hole 98 is larger than the outer diameter of the fine-tuning mounting seat 95.

[0077] This embodiment also provides a method for using the fine-tuning stroke component, including the following steps:

[0078] Step 1: Rotate the fine adjustment knob 93 in the forward direction to move the fine adjustment stroke mechanism along the Z direction for the first stroke. The first stroke is greater than the design stroke (the design stroke is the stroke that the oscillating cylinder assembly needs to descend according to different mold requirements).

[0079] Step 2: Calculate the second stroke that the locking component 92 needs to move based on the first mark 922 on the locking sleeve 920 and the second mark 931 on the fine adjustment knob 93, and rotate the locking knob 921 in the opposite direction to move the second stroke.

[0080] Step 3: Rotate the fine adjustment knob 93 in the opposite direction so that the locking knob 921 abuts against the surface of the mounting cavity side wall 6 near the locking knob 921.

[0081] See Figures 13 to 16 In this embodiment, an electrical box bracket 11 is provided on one side wall of the ultrasonic welding machine column 2. The electrical box bracket 11 includes a first support plate 110 and a second support plate 111 arranged perpendicularly to each other. The first support plate 110 is detachably installed on one side wall of the column 2. Alternatively, it can be fixed to the column using existing fixing methods. The top of the second support plate 111 is provided with a first limiting plate 112 that is parallel and symmetrical to each other, away from the column 2 and a second limiting plate 113 that is close to the column. An installation groove 114 extending in the Y direction is formed between the first limiting plate 112 and the second limiting plate 113. The electrical box 10 is provided in the installation groove 114. Two clamping components 13 are installed on the first limiting plate 112. The clamping components 13 are threadedly connected to the first limiting plate 112. By rotating the clamping components 13, the clamping components 13 can move in the X direction to abut against the side wall of the electrical box 11. The clamping components 13 and the second limiting plate 113 cooperate to clamp the electrical box 11.

[0082] The second support plate 111 is provided with multiple mounting holes 115, and the electrical box bracket 10 is also provided with a lower unit 12. By using fasteners and multiple mounting holes 115, the lower unit 12 can be detachably installed on the bottom of the second support plate 111.

[0083] A third support plate 116 is provided near the connection between the first support plate 110 and the second support plate 111. The opposite side walls of the third support plate 116 are connected to the first support plate 110 and the second support plate 111, respectively. The first support plate 110, the second support plate 111, and the third support plate 116 are integrally formed, and a cavity 117 is formed between the first support plate 110, the second support plate 111, and the third support plate 116. The cross-section of the cavity 117 is triangular. The integral forming of the three plates can effectively improve the structural strength.

[0084] Optionally, the third support plate is a triangular plate, and multiple third support plates are connected between the first support plate 110 and the second support plate 111. The two right-angled sides of the third support plate are connected to the first support plate 110 and the second support plate 111 respectively, and the connection between the first support plate 110, the second support plate 111 and the third support plate is detachable.

[0085] A first damping pad 119 is provided between the second support plate 111 and the electrical box 10, and the electrical box is separated from the second support plate 111 by the first damping pad 119. A second damping pad 118 is provided on the side wall where the second limiting plate 113 contacts the electrical box 10, and the electrical box 10 is separated from the second limiting plate 113 by the second damping pad 118. The damping pads not only increase the friction between the electrical box 10 and the bracket 11, preventing the electrical box 10 from moving, but also reduce the impact of machine vibration on the electrical box.

[0086] The clamping assembly includes a clamping knob 130, a screw 131, and a pressure plate 132. The screw 131 passes through and is threadedly connected to the first limiting plate 112. The clamping knob 130 is installed at the first end of the screw 131, and the pressure plate 132 is installed at the second end of the screw 131 and located in the mounting groove 114. The side of the pressure plate 132 opposite to the screw 131 is recessed inward to form a cavity 140. A device is installed in the cavity 140. The device is equipped with a clamping block 133, which includes a mounting part 1331 and a clamping part 1330. The mounting part 1331 is installed in the cavity 140 and has the same shape as the cavity 140. The clamping part 1330 protrudes from the end wall of the pressure plate 132 away from the screw 131 along the axial direction of the screw 131. The outer diameter of the clamping part 1330 is equal to the outer diameter of the end wall of the pressure plate 132 away from the clamping knob 130.

[0087] An anti-cavity groove 139 is provided on the inner peripheral wall of the cavity 140. The anti-cavity groove 139 is recessed from the inner peripheral wall of the pressure plate 132 radially and extends circumferentially along the pressure plate 132. Along the axial direction of the pressure plate 132, from the side of the pressure plate 132 near the clamping knob 130 to the end away from the clamping knob 130, the cross-sectional area of ​​the cavity 140 gradually increases.

[0088] The pressure plate 132 can rotate circumferentially along the screw 131. A slide rod 135 extending axially along the screw 131 is fixedly installed at the second end of the screw 131. The diameter of the slide rod 135 is smaller than the diameter of the screw 131. A first through hole 137 extending axially along the screw 131 is provided in the bottom wall of the cavity 140. The pressure plate 132 is fitted onto the slide rod 135 through the first through hole 137 and can rotate around the central axis of the slide rod 135. A threaded hole 1350 coaxial with the screw 131 is provided in the center of the end wall of the slide rod 135 near the cavity 140. A bolt 134 is installed in the threaded hole 1350. The bolt head of the bolt 134 is located in the cavity 140. The diameter of the bolt head is larger than the diameter of the first through hole 137. The cooperation between the bolt head and the screw 131 makes the pressure plate 132 axially limited in the slide rod 135. Alternatively, a bearing can be installed in the first through hole, and the slide rod 135 can be installed in the bearing.

[0089] In this design, a boss 136 is provided on the bottom wall of the cavity 140. The boss 136 protrudes from the bottom wall of the pressure plate 132 away from the screw 131 along the axial direction of the screw 131. The first through hole 137 penetrates the boss 136. The diameter of the bolt head is smaller than the outer diameter of the boss 136. A second through hole 138 is provided in the pressing rubber block 133. The boss 136 extends into the second through hole 138 and is interference-fitted with the second through hole 138.

[0090] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A clamping assembly, comprising a knob, a screw, and a pressure plate, wherein the knob and the pressure plate are respectively disposed at both ends of the screw; Its features are: The pressure plate is recessed inward on the side away from the screw to form a cavity. A clamping rubber block is installed in the cavity. The clamping rubber block includes an installation part and a clamping part. The installation part is installed in the cavity and has the same shape as the cavity. The clamping part protrudes from the end wall of the pressure plate away from the screw along the axial direction of the screw in a direction away from the screw. Along the axial direction of the pressure plate, from the end of the pressure plate closer to the knob to the end farther away from the knob, the cross-sectional area of ​​the cavity gradually increases; The inner wall of the cavity is provided with a cavity clearance groove; The clearance groove is recessed from the inner peripheral wall of the pressure plate along the radial direction of the pressure plate; The clearance groove extends circumferentially along the pressure plate and is used to accommodate the deformation of the pressing rubber block during the pressing process; The pressure plate can rotate around the circumference of the screw to prevent the clamping rubber block from wearing out as the screw rotates; The second end of the screw is provided with a slide rod extending along the axial direction of the screw, and the diameter of the slide rod is smaller than the diameter of the screw; the bottom wall of the cavity is provided with a first through hole extending along the axial direction of the screw, and the pressure plate is fitted onto the slide rod through the first through hole and can rotate around the central axis of the slide rod; A boss is provided on the bottom wall of the cavity. The boss protrudes from the bottom wall of the pressure plate away from the screw along the axial direction of the screw. The first through hole penetrates the boss. A threaded hole is provided on the end wall of the slide rod. A bolt is installed in the threaded hole. The bolt head is located in the cavity. The diameter of the bolt head is smaller than the outer diameter of the boss. A second through hole is provided in the pressing rubber block. The boss extends into the second through hole and is interference-fitted with the second through hole.

2. The clamping assembly according to claim 1, characterized in that: Multiple clearance slots are arranged at intervals along the axial direction of the screw.

3. The clamping assembly according to claim 2, characterized in that: The bolt head and the screw cause the pressure plate to be positioned at the upper axial limit of the slide rod.

4. The clamping assembly according to any one of claims 1 to 3, characterized in that: The outer diameter of the clamping part is equal to the outer diameter of the end wall of the pressure plate away from the knob.

5. A clamping device, characterized in that: The clamping device includes a clamping assembly as claimed in any one of claims 1 to 4.

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