CN110757365A

CN110757365A - Tensioning assembly and clamping mechanism

Info

Publication number: CN110757365A
Application number: CN201911058719.XA
Authority: CN
Inventors: 梁六兴
Original assignee: Xinhui Precision Hardware (huizhou) Co Ltd
Current assignee: Xinhui Precision Hardware (huizhou) Co Ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-02-07

Abstract

The application relates to a tensioning assembly and a clamping mechanism. The tensioning assembly comprises a shell, a movable block, a pressing block, a sliding rod and a driving assembly, and is provided with an accommodating cavity and a first sliding hole which are communicated; the movable block is positioned in the accommodating cavity and is in sliding connection with the shell, the movable block is provided with a first inclined plane, and the movable block is provided with a first through hole; the pressing block is positioned in the accommodating cavity and is connected relative to the shell, the pressing block is provided with a second inclined surface in sliding fit with the first inclined surface, the pressing block is provided with a second through hole, and the second through hole is arranged corresponding to the first sliding hole; the sliding rod is respectively arranged in the first through hole and the second through hole in a penetrating way; when the movable block and the pressing block move relatively in the direction away from each other, the pressing block is connected with the shell, so that the movable block pulls the sliding rod to slide in the direction of sliding into the shell to tighten the sliding rod, the workpiece is tightened and positioned on one side of the shell, and the clamping and positioning of the workpiece are completed.

Description

Tensioning assembly and clamping mechanism

Technical Field

The application relates to the technical field of product positioning, in particular to a tensioning assembly and a clamping mechanism.

Background

A traditional clamping mechanism adopts a positioning plate with the thickness of about 25mm, a workpiece is locked and fixed by screws, and then the positioning plate is locked on a workbench. The machined workpiece is a workpiece with larger weight and is clamped outside the machine, namely the positioning plate needs to be moved out of the machine and then the workpiece needs to be disassembled after each machining, and then the workpiece to be machined is locked and then is moved into the machine built-in machine for machining, so that the clamping and positioning operation of the workpiece is time-consuming.

Disclosure of Invention

In view of the above, it is necessary to provide a tensioning assembly and a clamping mechanism for solving the problem that the clamping and positioning operations of the workpiece are time-consuming.

A tensioning assembly comprising:

the shell is provided with a containing cavity and a first sliding hole which are communicated;

the movable block is positioned in the accommodating cavity and is in sliding connection with the shell, the movable block is provided with a first inclined plane, and the movable block is provided with a first through hole;

the pressing block is positioned in the accommodating cavity and is connected relative to the shell, the pressing block is provided with a second inclined surface in sliding fit with the first inclined surface, the pressing block is provided with a second through hole, and the second through hole is arranged corresponding to the first sliding hole;

the sliding rod penetrates through the first through hole, the second through hole and the first sliding hole respectively, two ends of the sliding rod are limited through the first through hole and the second through hole respectively, the sliding rod is connected with the shell in a sliding mode, and at least part of the end, close to the first sliding hole, of the sliding rod is located on the periphery of the shell;

the driving assembly is arranged on the shell, the power output end of the driving assembly is connected with the movable block, and the driving assembly drives the movable block to slide relative to the shell.

In one of them embodiment, the casing still offers with hold the second slide opening that the chamber communicates, first through-hole with the second slide opening corresponds the setting, the tip that is close to of slide bar is located in the second slide opening, when the movable block pulling slide bar slided towards the direction of sliding into the casing, the tip of slide bar can slide into the second slide opening in to better tensioning slide bar, the second slide opening plays the effect of keeping away the sky simultaneously, so that the slide bar contradicts with the inner wall of casing and interferes in the pulling process.

In one embodiment, the sliding rod comprises a sliding rod body and an abutting part which are connected, the abutting part is positioned in the second sliding hole and is in sliding connection with the shell, and the abutting part is limited on the first through hole so that the abutting part is limited on one side of the movable block, which is far away from the pressing block;

the sliding rod body is provided with a limiting part, and the limiting part is positioned in the first sliding hole and is connected with the shell in a sliding manner; the limiting part is limited on one side of the pressing block, which is deviated from the movable block, so that two ends of the sliding rod are limited through the first through hole and the second through hole respectively.

In one embodiment, the first through hole comprises a separation groove and a limiting groove which are communicated, the projection of the separation groove on the shell is in an oval shape, the short axis of the projection of the separation groove is larger than the maximum diameter of the end part of the sliding rod, which is adjacent to the first through hole, so that the end part of the sliding rod, which is adjacent to the first through hole, can be detached through the separation groove, the sliding rod and the movable block can be rapidly detached, and the use convenience of the tensioning assembly is improved; the minimum width of the limiting groove is smaller than the maximum diameter of the end part of the sliding rod, which is adjacent to the first through hole, so that the end part of the sliding rod, which is adjacent to the first through hole, is limited at one side of the first through hole.

In one embodiment, the driving assembly comprises an air cylinder and a connecting rod, the air cylinder is fixed on the shell, and a power output end of the air cylinder is connected with the movable block through the connecting rod, so that the power output end of the driving assembly is connected with the movable block.

In one embodiment, the power output end of the air cylinder is detachably connected to the movable block so as to detach the movable block.

In one embodiment, the tensioning assembly further comprises an abutting piece, the abutting piece is located in the accommodating cavity and connected with the shell, the abutting piece is located on one side, away from the pressing block, of the movable block, the movable block is provided with a third inclined surface, and the third inclined surface abuts against the abutting piece, so that the movable block and the shell slide more stably.

In one embodiment, the sliding rod is provided with threads at the part of the periphery of the shell; the tensioning assembly further comprises a locking nut which is sleeved on the sliding rod and is in threaded connection with the sliding rod; when a workpiece needs to be clamped, the workpiece is firstly locked between the sliding rod and the locking nut, so that the sliding rod is reliably connected with the workpiece all the time when the workpiece is pulled, tightly attached and closed to the shell.

In one embodiment, the tensioning assembly further comprises a roller, the roller is located in the accommodating cavity and is rotatably connected with the housing, the roller is in rolling contact with the pressing block, and the roller is further used for being in rolling connection with the first inclined surface when the movable block moves relative to the pressing block, so that the movable block moves more stably relative to the pressing block, and the movable block is better guided to move towards the direction adjacent to the pressing block.

A clamping mechanism comprises a bottom plate and the tensioning assembly in any one of the embodiments, and a shell is connected with the bottom plate. According to the tensioning assembly and the clamping mechanism, the shell can be installed and connected on the bottom plate, the sliding rod can be detachably connected with a workpiece, and when the workpiece needs to be clamped, the workpiece is firstly connected to the end part, located on the periphery of the shell, of the sliding rod; then the driving assembly drives the movable block to slide along a first direction relative to the shell, the first inclined plane slides relative to the second inclined plane, so that the movable block slides along the axial direction of the sliding rod towards the direction far away from the pressing block, and the two ends of the sliding rod are respectively limited through the first through hole and the second through hole, so that the problem that the two ends of the sliding rod are respectively separated from the movable block and the pressing block is avoided; when the workpiece is machined, the driving assembly drives the movable block to slide relative to the shell along a second direction opposite to the first direction, the first inclined surface slides relative to the second inclined surface, the movable block slides along the axial direction of the sliding rod towards the direction close to the pressing block, the sliding rod slides towards the direction sliding away from the shell to loosen the sliding rod, and therefore the sliding rod drives the workpiece to slide relative to the first sliding hole, the distance between the workpiece and the shell exists, and the workpiece can be dismounted at the moment; the tensioning assembly can quickly clamp the workpiece, and the problem that the traditional clamping mechanism is time-consuming and labor-consuming in operation is solved.

Drawings

FIG. 1 is a schematic view of a clamping mechanism for clamping a workpiece according to an embodiment;

FIG. 2 is a schematic view of the fixture of FIG. 1 from another perspective;

FIG. 3 is a schematic view of the fixture of FIG. 1 from yet another perspective;

FIG. 4 is a schematic view of a take-up assembly of the fixture of FIG. 1;

FIG. 5 is a cross-sectional view of the take-up assembly shown in FIG. 4;

FIG. 6 is a schematic view of a housing of the take-up assembly of FIG. 5;

FIG. 7 is a schematic view of a movable block of the tensioning assembly shown in FIG. 5;

FIG. 8 is a schematic view of another perspective of the movable block shown in FIG. 7;

FIG. 9 is a schematic view of a pressure block of the tensioning assembly of FIG. 5;

FIG. 10 is a schematic view of a slide bar of the take-up assembly of FIG. 5;

FIG. 11 is a partial schematic view of the take-up assembly of FIG. 5;

figure 12 is a schematic view of an interchangeable plate of the fixture of figure 1.

Detailed Description

To facilitate an understanding of the present application, the tensioning assembly and the clamping mechanism will be described more fully below with reference to the associated drawings. Preferred embodiments of the tensioning assembly and clamping mechanism are shown in the accompanying drawings. However, the tensioning assembly and the clamping mechanism may take many different forms and are not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the tension assembly and the clamp is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, a clamping mechanism 10 of an embodiment is used for clamping a workpiece 20. The clamping mechanism comprises a base plate 100 and a tensioning assembly 200. As shown in fig. 4 and 5, in one embodiment, the tightening assembly 200 includes a housing 210, a movable block 220, a pressing block 230, a sliding rod 240, and a driving assembly 250. As shown in fig. 6, the housing 210 defines a receiving cavity 212 and a first sliding hole 216 that are communicated with each other. In the present embodiment, the housing 210 is connected to the base plate 100. In one embodiment, the housing 210 is a rectangular parallelepiped. The first sliding hole 216 is opened on a side of the housing 210 facing away from the base plate 100.

As shown in fig. 5, 7 and 8, in one embodiment, the movable block 220 is located in the accommodating cavity 212 and is slidably connected with the housing 210. The movable block 220 is provided with a first slope 221. In one embodiment, the movable block 220 defines a first through hole 223.

In one embodiment, as shown in fig. 5 and 9, the pressing piece 230 is located in the accommodating chamber 212 and connected with respect to the housing 210. The pressing block 230 is provided with a second inclined surface 232 which is in sliding fit with the first inclined surface 221. In one embodiment, the pressing block 230 defines a second through hole 234, and the second through hole 234 is disposed corresponding to the first sliding hole 216. In the present embodiment, the center line of the second through hole 234 is parallel to the center line of the first slide hole 216.

As shown in fig. 5, in one embodiment, the sliding rod 240 is inserted through the first through hole 223, the second through hole 234 and the first sliding hole 216. The two ends of the sliding rod are respectively limited through the first through hole and the second through hole. The sliding rod 240 is slidably coupled to the housing 210. The end of the slide bar 240 adjacent the first slide aperture 216 is at least partially located at the periphery of the housing 210.

As shown in fig. 5, in one embodiment, the driving assembly 250 is disposed on the housing 210, and the power output end of the driving assembly 250 is connected to the movable block 220. The driving assembly 250 drives the movable block 220 to slide relative to the housing 210. In this embodiment, the power output end of the driving assembly 250 is at least partially located in the accommodating cavity 212 and connected with the movable block 220, so that the driving assembly 250 can drive the movable block 220 to slide relative to the housing 210.

In the tensioning assembly 200 and the clamping mechanism 10, the housing 210 can be mounted and connected to the base plate 100, the sliding rod 240 can be detachably connected to a workpiece, and when the workpiece needs to be clamped, the workpiece is firstly connected to the end of the sliding rod 240 located at the periphery of the housing 210; then the driving assembly 250 drives the movable block 220 to slide along a first direction relative to the housing 210, the first inclined surface 221 slides relative to the second inclined surface 232, so that the movable block 220 slides along the axial direction of the sliding rod 240 towards a direction away from the pressing block 230, because the two ends of the sliding rod 240 are limited by the first through hole 223 and the second through hole 234 respectively, the problem that the two ends of the sliding rod 240 are separated from the movable block 220 and the pressing block 230 respectively is avoided, when the movable block 220 and the pressing block 230 move relatively towards the direction away from each other, because the pressing block 230 is connected with the housing 210, the movable block 220 pulls the sliding rod 240 to slide towards the direction sliding into the housing 210 to tension the sliding rod 240, so that the workpiece is tensioned and positioned at one side of the housing 210, and clamping and positioning of the workpiece are completed. When the workpiece is machined, the driving assembly 250 drives the movable block 220 to slide relative to the housing 210 in a second direction opposite to the first direction, the first inclined surface 221 slides relative to the second inclined surface 232, the movable block 220 slides along the axial direction of the sliding rod 240 in a direction close to the pressing block 230, the sliding rod 240 slides in a direction sliding away from the housing 210 to release the sliding rod 240, and the workpiece is dismounted. The tensioning assembly 200 can rapidly clamp the workpiece, and solves the problem that the conventional clamping mechanism 10 is time-consuming and labor-consuming to operate.

In one embodiment, the housing further defines a second sliding hole 214 communicating with the accommodating cavity, and the first through hole and the second sliding hole are correspondingly disposed. The end of the sliding rod adjacent to the first through hole is positioned in the second through hole. When the movable block pulls the sliding rod to slide towards the direction sliding into the shell, the end part of the sliding rod can slide into the second sliding hole so as to better pull the sliding rod, and the second sliding hole simultaneously plays a role in avoiding space so as to prevent the sliding rod from being interfered with the inner wall of the shell in the pulling process. In the present embodiment, the second sliding hole 214 is opened on a surface of the housing 210 adjacent to the bottom plate 100. In the present embodiment, the center line of the first through hole 223 is parallel to the center line of the second slide hole 214. The center line of the second through hole 234 is parallel to the center line of the first through hole 223.

As shown in fig. 10, in one embodiment, the sliding rod 240 includes a connecting sliding rod body 242 and an abutment 244. The abutment 244 is located within the second slide aperture 214 and is slidably coupled to the housing 210. The abutting portion 244 is not slid in the first through hole 223, so that the abutting portion 244 is limited on one side of the movable block 220 departing from the pressing block 230, and the problem that the sliding rod 240 is separated from the housing 210 due to the fact that the abutting portion 244 slides in the first through hole 223 is avoided.

As shown in fig. 10, in one embodiment, the sliding rod body 242 is provided with a limiting portion 243, and the limiting portion 243 is located in the first sliding hole 216 and is slidably connected to the housing 210. The limiting portion 243 is not limited by the second through hole 234, so that the limiting portion 243 is limited by one side of the pressing block 230, which is away from the movable block 220, and two ends of the sliding rod 240 are limited by the first through hole 223 and the second through hole 234, thereby avoiding the problem that the sliding rod 240 is separated from the pressing block 230 when the limiting portion 243 slides into the second through hole 234.

As shown in fig. 10, a stopping tapered surface 245 is further disposed at a position of the limiting portion 243 adjacent to the second through hole 234, the stopping tapered surface 245 abuts against an edge of the second through hole 234 when the pressing block 230 slides relative to the sliding block, that is, the stopping tapered surface 245 abuts against an edge of the second through hole 234 when the sliding rod 240 is pulled tight, so that the limiting portion 243 is better abutted against the pressing block 230.

As shown in fig. 7 and 8, in one embodiment, the first through hole 223 includes a release groove 222 and a stopper groove 224 which communicate with each other. The projection of the disengagement slot 222 on the housing 210 is elliptical. The short axis of the projection of the disengagement groove 222 is larger than the maximum diameter of the end of the sliding rod 240 adjacent to the first through hole 223, so that the end of the sliding rod 240 adjacent to the first through hole 223 can be detached through the disengagement groove 222, the sliding rod 240 and the movable block 220 can be rapidly detached, and the use convenience of the tensioning assembly 200 is improved. The minimum width of the stopper groove 224 is smaller than the maximum diameter of the end of the sliding rod 240 adjacent to the first through hole 223, so that the end of the sliding rod 240 adjacent to the first through hole 223 is stopped at one side of the first through hole 223. In the present embodiment, the projection of the disengagement groove 222 on the housing 210 is elliptical, the projection of the limiting groove 224 on the housing 210 is kidney-shaped, and the limiting groove 224 is communicated with the disengagement groove 222.

As shown in fig. 5, in the present embodiment, the driving assembly is a cylinder assembly. In one embodiment, the drive assembly 250 includes a cylinder 252 and a connecting rod 254, the cylinder 252 being secured to the housing 210. The power output of the air cylinder 252 is connected to the movable mass 220 by a connecting rod 254 such that the power output of the drive assembly 250 is connected to the movable mass 220. In this embodiment, the connecting rod 254 is at least partially disposed within the receiving cavity 212 and is connected to the movable mass 220.

In one embodiment, as shown in fig. 5, the power output of the air cylinder 252 is removably connected to the movable mass 220 to facilitate removal of the movable mass 220. In one embodiment, the tensioning assembly 200 further includes a retaining member 260. Referring to fig. 7, the movable block 220 is provided with a groove 226 and an open slot 227 which are communicated with each other. The connecting rod 254 defines a threaded bore 254a in communication with the open slot 227 and the retaining member 260 is at least partially disposed within the recess 226. The locking member 260 is respectively inserted into the opening groove 227 and the threaded hole 254a, and the end of the locking member 260 away from the power output end of the air cylinder 252 is limited in the groove 226, so that the movable block 220 can be detachably connected to the power output end of the air cylinder 252. In the present embodiment, the open groove 227 opens at the end of the movable block 220 adjacent to the power take-off of the cylinder 252. Retaining member 260 is a screw.

It is understood that in other embodiments, the driving assembly is not limited to the cylinder assembly, but may be a motor screw assembly or the like.

As shown in FIG. 11, in one embodiment, the tensioning assembly 200 further includes an abutment 270, the abutment 270 being located within the receiving cavity 212 and coupled to the housing 210. The abutment 270 is located on a side of the movable mass 220 facing away from the pressing mass 230. The movable block 220 is provided with a third inclined surface 228, and the third inclined surface 228 abuts against the abutting piece 270, so that the sliding between the movable block 220 and the shell 210 is more stable. In this embodiment, the abutting member 270 is a bead, and the third inclined surface 228 is disposed on a side of the movable block 220 away from the pressing block 230. In order to make the sliding between the movable block 220 and the housing 210 more smooth, further, the number of the abutting pieces 270 is at least two, and at least two abutting pieces 270 are provided at intervals. The number of the third inclined surfaces 228 is at least two, and each third inclined surface 228 is slidably abutted with the corresponding abutment member 270, so that the sliding between the movable block 220 and the housing 210 is more stable.

As shown in FIG. 11, in one embodiment, the take-up assembly 200 further includes a roller 280, the roller 280 being positioned within the receiving cavity 212 and being rotatably coupled to the housing 210. The roller 280 is in rolling contact with the pressing block 230, and the roller 280 is further used for being in rolling connection with the first inclined surface 221 when the movable block 220 moves relative to the pressing block 230, so that the movable block 220 moves relative to the pressing block 230 more stably, and the movable block 220 is better guided to move towards the direction adjacent to the pressing block 230. In the present embodiment, when the movable block 220 slides relative to the pressing block 230 in a direction approaching the pressing block 230, the first inclined surface 221 is in rolling contact with the roller 280. When the first inclined surface 221 slides against the second inclined surface 232, the top 225 of the movable block 220 is in rolling connection with the roller 280. When the movable block 220 slides to a predetermined distance with respect to the pressing block 230 in a direction away from the pressing block 230, the first slope 221 is separated from the roller 280.

In one embodiment, as shown in fig. 11, the pressing block 230 defines an abutting groove 236, and the roller is partially located in the abutting groove and abuts against the pressing block, so that the pressing block is better abutted against the roller. In this embodiment, the abutting groove extends to the second inclined surface, so that the roller can be simultaneously in rolling abutment with the pressing block and the movable block.

Further, as shown in FIG. 11, the take-up assembly 200 also includes an adjustment member 290. The housing 210 is provided with an adjusting hole 211 communicated with the accommodating cavity 212, and the pressing block 230 is provided with a connecting screw hole 231 corresponding to the adjusting hole 211. The adjusting member 290 is inserted into the adjusting hole 211 and the connecting screw hole 231, respectively, so that the pressing block 230 is connected and fixed to the housing 210. When the relative installation position of the pressing block 230 and the housing 210 needs to be adjusted, the adjusting member 290 can be loosened, so that the adjusting member 290 can be screwed into the connecting screw hole 231 to adjust the position of the second inclined surface 232 and the position of the rolling connection between the pressing block 230 and the roller 280. In this embodiment, the adjustment member 290 is an adjustment bolt.

Further, as shown in fig. 11, the tension assembly 200 further includes a pin 310, and the pin 310 is located in the receiving cavity 212 and connected to the housing 210. The pressing block 230 is provided with a kidney-shaped hole 233, and the pin 310 is partially positioned in the kidney-shaped hole 233 and is in sliding connection with the pressing block 230, so that when the relative installation position of the pressing block 230 and the shell 210 is adjusted, the pressing block 230 slides relative to the pin 310, and the adjustment of the pressing block 230 is more stable. In addition, due to the fact that the connecting screw hole 231 is matched with the adjusting piece 290, the pin 310 is in sliding fit with the waist-shaped hole 233, the parallelism of the first inclined surface 221 and the second inclined surface 232 can be ensured all the time in the process of adjusting the connecting position of the pressing block 230 relative to the shell 210, the accurate adjustment of the relative position of the pressing block 230 and the shell 210 is realized, and the sliding rod 240 can be tensioned when the first inclined surface 221 slides relative to the second inclined surface 232.

As shown in fig. 11, the center line of the connecting screw hole 231 is parallel to the extending direction of the waist-shaped hole 233, so that the adjusting member 290 can drive the pressing block 230 to slide smoothly relative to the housing 210 during the screwing process of screwing into the connecting screw hole 231. Further, the waist-shaped hole 233 communicates with the connection screw hole 231, so that the waist-shaped hole 233 is disposed adjacent to the connection screw hole 231, which makes the pressing block 230 more compact.

As shown in fig. 11, the tightening assembly 200 further includes a supporting member 320, and the housing 210 has an adjusting hole 214. The center line of the adjustment hole 214 is arranged in parallel with the center line of the adjustment hole 211. The holding member 320 is located in the dispensing hole 214 and is threadedly coupled to the housing 210. When the relative position of the pressing block 230 and the housing 210 is adjusted by the adjusting member 290 and the pressing block 230 leaves the position of the housing 210 with the adjusting hole 211, the abutting member 320 is screwed to abut against the pressing block 230, so that the pressing block 230 is prevented from swinging during sliding relative to the housing 210, and the first inclined surface 221 and the second inclined surface 232 are kept parallel. In the present embodiment, the holding member 320 is a stud.

In order to make the pressing block 230 have a predetermined slight movement amount in the extending direction of the center line of the second sliding hole 214 relative to the housing 210, further, the adjusting member 290 is in clearance fit with the adjusting hole 211, that is, a clearance exists between the adjusting member 290 and the adjusting hole 211, so that the pressing block 230 has a predetermined slight movement amount in the extending direction of the center line of the second sliding hole 214 relative to the housing 210, and the relative movement position of the pressing block 230 and the housing 210 is further stabilized.

In one embodiment, the sliding rod is provided with threads at a portion located at the periphery of the housing. The tensioning assembly further comprises a locking nut which is sleeved on the sliding rod and is in threaded connection with the sliding rod. When a workpiece needs to be clamped, the workpiece is firstly locked between the sliding rod and the locking nut, so that the sliding rod is reliably connected with the workpiece all the time when the workpiece is pulled, tightly attached and closed to the shell. As shown in fig. 1, in the present embodiment, a through hole 22 is formed in the workpiece 20, and the through hole is used for inserting the slide rod.

In one embodiment, the number of tensioning assemblies 200 is two, and the two tensioning assemblies 200 are spaced apart. When a workpiece needs to be clamped, firstly, the sliding rods 240 of the two tensioning assemblies 200 are screwed with the threaded holes 252a of the workpiece; then, the driving assemblies 250 of the two tensioning assemblies 200 act simultaneously to respectively drive the corresponding movable blocks 220 to slide relative to the corresponding shells 210, so that the sliding rods 240 of the two tensioning assemblies 200 can tightly attach the workpiece to the corresponding shells 210, and thus the workpiece can be simultaneously attached to the shells 210 of the two tensioning assemblies 200, thereby completing the attaching and clamping of the workpiece.

In one embodiment, the number of the tension assemblies 200 is plural, and the plural tension assemblies 200 are spaced apart. When a workpiece needs to be clamped, firstly, the sliding rods 240 of the plurality of tensioning assemblies 200 are all screwed with the threaded holes 252a of the workpiece; then, the driving assemblies 250 of the plurality of tensioning assemblies 200 simultaneously act to respectively drive the corresponding movable blocks 220 to slide relative to the corresponding shells 210, so that the sliding rods 240 of the plurality of tensioning assemblies 200 can tightly attach the workpiece to the corresponding shells 210, and thus the workpiece can be simultaneously attached to the shells 210 of the plurality of tensioning assemblies 200, thereby completing the attaching and clamping of the workpiece.

As shown in fig. 1, in one embodiment, the clamping mechanism 10 further includes a supporting block 400, the supporting block 400 is connected to the bottom plate 100, and the supporting block 400 and the housing 210 are both disposed on the same side of the bottom plate 100. When the movable block 220 pulls the sliding rod 240 tightly, the workpiece is pulled tightly and abutted to the shell 210, and the supporting block 400 and the shell 210 support the workpiece together, so that the flatness of clamping the workpiece on the pulling assembly 200 is improved. In one embodiment, the number of the tension assemblies 200 is at least two, and the support block 400 is located between two adjacent tension assemblies 200.

As shown in fig. 3 and 12, in one embodiment, the clamping mechanism 10 further includes an exchangeable plate 500, and the exchangeable plate 500 is provided with a clearance hole 510. The sliding rod 240 penetrates through the clearance hole and is connected with the workpiece, so that the sliding rod 240 is tightly locked with the workpiece, the threaded connection between the sliding rod 240 and the workpiece is not easy to loosen, and the sliding rod 240 is tightly connected with the workpiece.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A tensioning assembly, comprising:

2. The tension assembly as recited in claim 1, wherein the housing further defines a second slide hole communicating with the accommodating cavity, the first through hole is disposed corresponding to the second slide hole, and an end of the slide rod adjacent to the first through hole is disposed in the second slide hole.

3. The tension assembly as claimed in claim 2, wherein the sliding rod comprises a sliding rod body and an abutting portion connected with each other, the abutting portion is located in the second sliding hole and connected with the housing in a sliding manner, and the abutting portion is prevented from sliding in the first through hole, so that the abutting portion is limited on one side of the movable block, which faces away from the pressing block;

the sliding rod body is provided with a limiting part, and the limiting part is positioned in the first sliding hole and is connected with the shell in a sliding manner; the limiting part is limited on one side of the pressing block, which is deviated from the movable block.

4. The tension assembly as recited in claim 3, wherein the first through hole comprises a disengagement groove and a limiting groove which are communicated with each other, a projection of the disengagement groove on the housing is elliptical, a minor axis of the projection of the disengagement groove is larger than a maximum diameter of an end of the sliding rod adjacent to the first through hole, and a minimum width of the limiting groove is smaller than a maximum diameter of an end of the sliding rod adjacent to the first through hole.

5. The take-up assembly as recited in claim 1, wherein the drive assembly comprises a cylinder and a connecting rod, the cylinder being secured to the housing, a power output of the cylinder being connected to the movable block through the connecting rod such that the power output of the drive assembly is connected to the movable block.

6. The take-up assembly as recited in claim 5, wherein the power output of the air cylinder is removably attached to the movable block.

7. The tensioning assembly according to claim 1, further comprising an abutment member located within the receiving cavity and connected to the housing, the abutment member being located on a side of the movable block facing away from the pressing block, the movable block being provided with a third inclined surface, the third inclined surface abutting the abutment member.

8. The tension assembly as recited in claim 1 wherein said slide bar is threaded at a location on the periphery of said housing; the tensioning assembly further comprises a locking nut which is sleeved on the sliding rod and is in threaded connection with the sliding rod.

9. The tension assembly as recited in claim 1 further comprising a roller positioned within said receiving cavity and rotatably coupled to said housing, said roller being in rolling abutment with said weight, said roller being further adapted to be in rolling engagement with said first ramp when said movable mass moves relative to said weight.

10. A chuck assembly comprising a base plate and a tension assembly as claimed in any one of claims 1 to 9, said housing being connected to said base plate.