CN219403256U

CN219403256U - Workpiece clamping device

Info

Publication number: CN219403256U
Application number: CN202223304854.8U
Authority: CN
Inventors: 王俊锋; 陈伦龙; 李政; 唐凌志
Original assignee: Guangdong Ucan Robot Technology Co Ltd
Current assignee: Guangdong Ucan Robot Technology Co Ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-07-25
Anticipated expiration: 2032-12-09

Abstract

The utility model relates to the field of clamps and discloses a workpiece clamping device which comprises a fixing frame, a rotary clamping arm and a driving assembly; the rotary clamping arm is rotatably arranged on the fixing frame through a rotary shaft, a fixed clamping arm is fixedly connected to the fixing frame corresponding to the rotary clamping arm, and the driving assembly is fixedly connected with the rotary shaft through a connecting rod; the driving assembly is used for driving the connecting rod to rotate around the rotating shaft so that the rotating clamping arm and the fixed clamping arm clamp the workpiece. The workpiece clamping device can effectively ensure the clamping precision of the workpiece and improve the machining precision of the drill point or the micro bar.

Description

Workpiece clamping device

Technical Field

The utility model relates to the field of clamps, in particular to a workpiece clamping device.

Background

At present, when a drill point or a tiny bar is processed, the drill point or the tiny bar is clamped by a workpiece clamping device, so that the drill point or the tiny bar is fixed, and the processing precision is improved.

The existing workpiece clamping device comprises a first clamping jaw, a second clamping jaw and an air cylinder for driving the first clamping jaw and the second clamping jaw to approach each other to clamp a workpiece, wherein in the clamping process, the first clamping jaw and the second clamping jaw move; after multiple clamping, the first clamping jaw and the second clamping jaw may deviate, so that the position for clamping the workpiece may change, the clamping precision of the workpiece is reduced, and the processing quality of the workpiece is affected.

In view of this, it is desirable to design a workpiece clamping device to improve the machining accuracy of a drill or a micro bar.

Disclosure of Invention

The utility model aims to provide a workpiece clamping device for improving machining precision of a drill point or a tiny bar stock.

To achieve the purpose, the utility model adopts the following technical scheme:

a workpiece clamping device comprises a fixing frame, a rotary clamping arm and a driving assembly;

the rotary clamping arm is rotatably arranged on the fixing frame through a rotary shaft, a fixed clamping arm is fixedly connected to the fixing frame corresponding to the rotary clamping arm, and the driving assembly is fixedly connected with the rotary shaft through a connecting rod;

the driving assembly is used for driving the connecting rod to rotate around the rotating shaft so that the rotating clamping arm and the fixed clamping arm clamp the workpiece.

Optionally, the length of connecting rod is greater than the length of rotatory arm lock, just the one end of connecting rod is connected fixedly connect the rotation axis, the other end rotation is connected drive assembly.

Optionally, the driving assembly comprises a fixed shaft and a cylinder body, the fixed shaft is fixedly connected with a piston, and the cylinder body is sleeved on the piston to form a first air cavity and a second air cavity which are respectively arranged at two sides of the piston;

the workpiece clamping device further comprises a first air pipe interface communicated with the first air cavity and a second air pipe interface communicated with the second air cavity;

the fixed shaft is fixed on the fixed frame, and the connecting rod is connected to the outer side wall of the cylinder body.

Optionally, a first air passage and a second air passage are arranged in the fixed shaft, one end of the first air passage is communicated with the first air pipe joint, and the other end of the first air passage is communicated with the first air cavity; one end of the second air passage is communicated with the second air pipe interface, and the other end of the second air passage is communicated with the second air cavity.

Optionally, a first sealing ring is arranged at the joint of the cylinder body and the fixed shaft, and the first sealing ring is embedded in the cylinder body;

the contact part of the piston and the cylinder body is provided with a second sealing ring, and the second sealing ring is embedded in the piston.

Optionally, the mount includes fixed connection's first fixed plate and second fixed plate, and connects first fixed plate with the riser of second fixed plate, drive assembly sets up between first fixed plate and the second fixed plate, rotatory arm lock with the fixation arm lock is all installed the same side of riser.

Optionally, a limiting groove is formed in the fixed clamping arm, and the rotating clamping arm is provided with a turning part used for limiting the workpiece in the limiting groove.

Optionally, the limiting groove is provided with a first limiting surface and a second limiting surface which are perpendicular to each other.

Optionally, the fixing clip arm is detachably mounted on the fixing frame.

Optionally, the rotating clamp arm is detachably mounted on the rotating shaft.

Compared with the prior art, the utility model has the following beneficial effects:

in the embodiment, the rotary clamping arm is rotatably arranged on the fixing frame through the rotary shaft, the driving assembly is fixedly connected with the rotary shaft through the connecting rod, and the fixing clamping arm is arranged on the fixing frame corresponding to the rotary clamping arm; the driving component is used for driving the connecting rod to rotate around the rotating shaft so that the rotating clamping arm and the fixed clamping arm clamp the workpiece. In the embodiment, the fixed clamping arm does not move, and displacement is not generated, so that the positions of the drill point or the micro bar can be kept consistent in each clamping mode by the aid of the rotary clamping mode of the fixed clamping arm and the rotary clamping arm, and machining accuracy of the drill point or the micro bar is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are therefore not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, which would otherwise be used by those skilled in the art, would not have the essential significance of the present disclosure, would still fall within the scope of the present disclosure without affecting the efficacy or achievement of the present disclosure.

Fig. 1 is a schematic perspective view of a workpiece clamping device according to an embodiment of the utility model;

FIG. 2 is a schematic side view of a workpiece holding apparatus according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the cross-sectional structure A-A in FIG. 2;

fig. 4 is a schematic perspective view of another workpiece clamping device according to an embodiment of the utility model.

Illustration of: 1. a fixing frame; 11. a first fixing plate; 12. a second fixing plate; 13. a riser; 101. fixing the clamping arm; 102. a limit groove; 2. rotating the clamping arm; 201. a turning part; 21. a rotation shaft; 3. a drive assembly; 31. a fixed shaft; 311. a first air hole; 312. a second air hole; 32. a cylinder; 33. a piston; 301. a first air chamber; 302. a second air chamber; 303. a first tracheal interface; 304. a second tracheal interface; 4. and a connecting rod.

Detailed Description

In order to make the objects, features and advantages of the present utility model more comprehensible, the technical solutions in the embodiments of the present utility model are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. It is noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

The workpiece clamping device is beneficial to ensuring the clamping precision of the drill point or the micro bar.

Referring to fig. 1 to 4, the workpiece clamping device includes a fixing frame 1 for supporting, a rotary clamping arm 2, and a driving assembly 3 for driving the rotary clamping arm 2 to rotate.

The rotary clamping arm 2 is rotatably installed on the fixing frame 1 through a rotary shaft 21, the fixing frame 1 is fixedly connected with a fixed clamping arm 101 corresponding to the rotary clamping arm 2, and the driving assembly 3 is fixedly connected with the rotary shaft 21 through a connecting rod 4.

In the actual clamping process, the driving assembly 3 drives the connecting rod 4 to rotate around the rotating shaft so as to enable the rotating clamp arm 2 to approach the fixed clamp arm 101, and therefore the rotating clamp arm 2 and the fixed clamp arm 101 are matched to clamp a workpiece.

The fixed clamping arm 101 is fixed relative to the fixed frame 1, so that the fixed clamping arm is not deviated relative to the rotary clamping arm 2, the clamping position of each drill point or each micro bar is ensured not to be changed, the clamping precision of the drill point or the micro bar is ensured, and the machining precision of the drill point or the micro bar is improved.

Alternatively, the length of the connecting rod 4 is greater than that of the rotary arm 2, and one end of the connecting rod 4 is fixedly connected with the rotary shaft 21, and the other end is rotatably connected with the driving assembly 3. The connecting rod 4 is equivalent to a lever, so that the force for clamping the workpiece by the rotary clamping arm 2 is larger than the output power of the driving assembly, and the fixing effect of the drill point or the micro bar is improved.

In one embodiment, as shown in fig. 3, the driving assembly 3 includes a fixed shaft 31 and a cylinder 32, wherein the fixed shaft 31 is fixed to the fixed frame 1, and the connecting rod 4 is connected to an outer sidewall of the cylinder 32. The fixed shaft 31 is fixedly connected with a piston 33, and the cylinder body 32 is sleeved on the piston 33 to form a first air cavity 301 and a second air cavity 302 which are respectively arranged at two sides of the piston 33. The workpiece holding device further includes a first air pipe interface 303 in communication with the first air chamber 301 and a second air pipe interface 304 in communication with the second air chamber 302.

Specifically, after the first air pipe interface 303 injects air into the first air cavity 301, the cylinder 32 moves downward, so as to drive the rotation shaft 21 to rotate, and further drive the rotation clamp arm 2 to rotate to clamp a workpiece; injecting gas into the second air chamber 302 at the second air pipe interface 304 can move the cylinder 32 upward, thereby driving the rotating clamp arm to rotate to loosen the workpiece.

It should be further added that the connecting rod 4 is provided with a through slot, the cylinder 32 is provided with a fixing column extending into the through slot, and when the cylinder 32 moves up or down, the fixing column moves up or down to drive the rotating shaft 21 to rotate forward or reverse. It should be further noted that the fixing post is generally smaller than the through slot, or the through slot is a groove, a rectangular slot, or the like.

In one embodiment, the fixed shaft 31 is provided with a first air passage 311 and a second air passage 312 therein, one end of the first air passage 311 is communicated with the first air pipe joint 303, and the other end is communicated with the first air chamber 301; one end of the second air passage 312 communicates with the second air pipe interface 304 and the other end communicates with the second air chamber 302.

The first air pipe interface 303 injects or discharges air into the first air chamber 301 through the first air passage 311, and the second air pipe interface 304 injects or discharges air into the second air chamber 302 through the second air passage 312. The first air pipe joint 303 is communicated with the first air cavity 301 through the first air channel 311, so that the first air pipe joint 303 does not need to move along with the movement of the cylinder 32, and the air pipe joint is convenient to be externally connected with an air pipe.

Specifically, in order to ensure the air tightness of the cylinder 32, a first sealing ring is arranged at the joint of the cylinder 32 and the fixed shaft 31, and the first sealing ring is embedded in the cylinder 32; a second sealing ring is arranged at the contact position of the piston 33 and the cylinder body 32, and the second sealing ring is embedded in the piston 33.

Alternatively, the fixing frame 1 comprises a first fixing plate 11 and a second fixing plate 12 which are fixedly connected, and a vertical plate 13 which is connected with the first fixing plate 11 and the second fixing plate 12, the driving component 3 is arranged between the first fixing plate 11 and the second fixing plate 12, and the rotary clamping arm 2 and the fixed clamping arm 101 are arranged on the same side of the vertical plate 13; specifically, one end of the fixed shaft 31 is connected to the first fixed plate 11, the other end is connected to the second fixed plate 12, and the cylinder 32 is located between the first fixed plate 11 and the second fixed plate 12. Specifically, the first fixing plate 11 and the second fixing plate 12 can limit the cylinder 32, so that the excessive moving stroke of the cylinder 32 is avoided.

Optionally, the fixed clamping arm 101 is provided with a limiting groove 102, and the rotating clamping arm 2 is provided with a turning part 201 for limiting the workpiece in the limiting groove 102. The turning part 201 presses the workpiece into the limit groove 102, and positioning of the workpiece is completed.

Optionally, the limiting groove 102 has a first limiting surface and a second limiting surface that are perpendicular to each other, and when the workpiece is clamped, the outer peripheral surface of the workpiece abuts against the first limiting surface and the second limiting surface.

Optionally, the fixing clip arms 101 are detachably mounted on the fixing frame 1, so that the fixing clip arms 101 with different specifications can be adjusted and disassembled to meet the requirements of producing workpieces with different specifications. Alternatively, the rotary clamping arm 2 is detachably mounted on the rotary shaft 21, and the production requirements of workpieces with different specifications can be met in the same way.

In another embodiment, as shown in fig. 1-4, the driving assembly 3 is provided with two fixing clamp arms 101 and rotating clamp arms 2, two fixing clamp arms 101 and one rotating clamp arm 2 are arranged on the fixing frame 1, one fixing clamp arm 101 and one rotating clamp arm 2 are matched to form a workpiece clamping position, the two workpiece clamping positions are located on the same side of the vertical plate 13, and the two rotating clamp arms 2 are located between the two fixing clamp arms 101. The workpiece clamping device in the embodiment is provided with two workpiece clamping positions, each workpiece clamping position is provided with an independent driving component 3, and the working efficiency of the workpiece clamping device can be effectively improved by controlling the alternate work of the two workpiece clamping positions.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The workpiece clamping device is characterized by comprising a fixing frame (1), a rotary clamping arm (2) and a driving assembly (3);

the rotary clamping arm (2) is rotatably mounted on the fixed frame (1) through a rotary shaft (21), a fixed clamping arm (101) is fixedly connected to the fixed frame (1) corresponding to the rotary clamping arm (2), and the driving assembly (3) is fixedly connected with the rotary shaft (21) through a connecting rod (4);

the driving assembly (3) is used for driving the connecting rod (4) to rotate around the rotating shaft so as to enable the rotating clamping arm (2) and the fixed clamping arm (101) to clamp a workpiece.

2. Workpiece clamping device according to claim 1, characterized in that the length of the connecting rod (4) is greater than the length of the rotating clamping arm (2), and that one end of the connecting rod (4) is fixedly connected with the rotating shaft (21), and the other end is rotatably connected with the driving assembly (3).

3. The workpiece clamping device according to claim 1, characterized in that the driving assembly (3) comprises a fixed shaft (31) and a cylinder body (32), the fixed shaft (31) is fixedly connected with a piston (33), and the cylinder body (32) is sleeved on the piston (33) to form a first air cavity (301) and a second air cavity (302) which are respectively arranged at two sides of the piston (33);

the workpiece clamping device further comprises a first air pipe interface (303) communicated with the first air cavity (301), and a second air pipe interface (304) communicated with the second air cavity (302);

the fixed shaft (31) is fixed on the fixed frame (1), and the connecting rod (4) is connected to the outer side wall of the cylinder body (32).

4. A workpiece clamping device according to claim 3, characterized in that a first air passage (311) and a second air passage (312) are arranged in the fixed shaft (31), one end of the first air passage (311) is communicated with the first air pipe joint (303), and the other end is communicated with the first air cavity (301); one end of the second air passage (312) is communicated with the second air pipe interface (304), and the other end is communicated with the second air cavity (302).

5. The workpiece clamping device according to claim 4, characterized in that a first sealing ring is arranged at the joint of the cylinder (32) and the fixed shaft (31), and the first sealing ring is embedded in the cylinder (32);

the contact part of the piston (33) and the cylinder body (32) is provided with a second sealing ring, and the second sealing ring is embedded in the piston (33).

6. Workpiece clamping device according to claim 1, characterized in that the fixing frame (1) comprises a first fixing plate (11) and a second fixing plate (12) which are fixedly connected, and a vertical plate (13) connecting the first fixing plate (11) and the second fixing plate (12), the driving assembly (3) is arranged between the first fixing plate (11) and the second fixing plate (12), and the rotary clamping arm (2) and the fixed clamping arm (101) are both arranged on the same side of the vertical plate (13).

7. The workpiece clamping device according to claim 1, characterized in that the fixed clamping arm (101) is provided with a limiting groove (102), and the rotary clamping arm (2) is provided with a turning part (201) for limiting the workpiece in the limiting groove (102).

8. The workpiece clamping device according to claim 7, characterized in that the limit groove (102) has a first limit surface and a second limit surface which are perpendicular to each other.

9. Workpiece clamping device according to claim 1, characterized in that the stationary clamping arm (101) is detachably mounted on the stationary frame (1).

10. Workpiece clamping device according to claim 1, characterized in that the rotating clamping arm (2) is detachably mounted on the rotating shaft (21).