CN113635106A

CN113635106A - Workpiece clamping and fixing device

Info

Publication number: CN113635106A
Application number: CN202111200499.7A
Authority: CN
Inventors: 陈召新; 刘平; 刘晓兵
Original assignee: Xuzhou Quanda Metal Products Co ltd
Current assignee: Xuzhou Quanda Metal Products Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2021-11-12

Abstract

The invention discloses a workpiece clamping and fixing device, which comprises a moving assembly and a fixing assembly, wherein the moving assembly comprises a moving frame, a buffer piece and a positioning piece, wherein the buffer piece and the positioning piece are arranged on the moving frame; the fixed assembly is arranged on the movable frame and comprises a fixed frame, an air cylinder arranged in the fixed frame, a connecting rod connected with the air cylinder and a clamping hand movably connected with the connecting rod; the workpiece clamping and fixing device has the functions of up-and-down floating and clamping, can have wide adaptability when clamping workpieces of different types, reduces the modification cost by changing the specification and the type of the clamp instead of the clamping device, reduces the modification difficulty, improves the working efficiency, and facilitates subsequent maintenance and upgrading because resources are only required to be input on the specification and the shape of the clamp for subsequent modification.

Description

Workpiece clamping and fixing device

Technical Field

The invention relates to the technical field of industrial equipment, in particular to a workpiece clamping and fixing device.

Background

A machine tool is a milling machine, a drilling machine or a lathe that performs cutting processing on a workpiece. The machining tool can also be a setting tool. The workpiece, such as a piston rod or a connecting rod, is held by a workpiece holding device during machining by the machine tool. The workpiece holding device is, for example, a workpiece table, which has one or more workpiece receiving seats that can be pivoted in the working range of the processing machine.

The workpiece receptacles must be adapted to the respective workpiece type. For example, stop blocks are provided on the workpiece holding device, which form a workpiece receptacle and hold the workpiece. If another type of workpiece is to be machined, either the entire workpiece holding device is replaced or the workpiece holding device must be modified, for example by replacing the holding means or mounting it elsewhere on the holding device. Retrofitting is cumbersome, expensive and therefore results in extended machine tool downtime.

Therefore, the workpiece clamping and fixing device has the functions of up-down floating and clamping, and can have wide adaptability when clamping workpieces of different models, so that the refitting difficulty is reduced, and the working efficiency is improved.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above-mentioned problems with the conventional work holding and fixing device.

Therefore, the invention aims to provide a workpiece clamping and fixing device which has the functions of up-and-down floating and clamping, can have wide adaptability when clamping workpieces of different types, reduces the refitting difficulty and improves the working efficiency.

In order to solve the technical problems, the invention provides the following technical scheme: a workpiece clamping and fixing device comprises a moving assembly and a fixing assembly, wherein the moving assembly comprises a moving frame, a buffer piece and a positioning piece, wherein the buffer piece and the positioning piece are arranged on the moving frame; the fixing assembly is arranged on the movable frame and comprises a fixing frame, an air cylinder arranged in the fixing frame, a connecting rod connected with the air cylinder and a clamping hand movably connected with the connecting rod.

As a preferable aspect of the work holding fixture of the present invention, wherein: the center of the moving frame is provided with a connecting hole, and the side wall of the moving frame is provided with a plurality of balancing weights.

As a preferable aspect of the work holding fixture of the present invention, wherein: the buffer piece comprises a fixed plate and a movable plate, the fixed plate is fixedly connected with the movable frame and is vertically arranged on the side wall of the movable frame, and the movable plate is parallel to the fixed plate.

As a preferable aspect of the work holding fixture of the present invention, wherein: the movable plate is connected with the fixed plate through a sliding rod, the spring is sleeved outside the sliding rod and is arranged between the fixed plate and the movable plate, and a plurality of limiting rods are further arranged between the fixed plate and the movable plate.

As a preferable aspect of the work holding fixture of the present invention, wherein: the locating element set up in the fixed plate bottom, including the symmetry set up in fixing base on the fixed plate bottom, be connected with the horizontal pole between the fixing base, sliding connection has the removal locating plate on the horizontal pole, be provided with damping spring on the space between removal locating plate and the fixing base, damping spring cup joints outside the horizontal pole.

As a preferable aspect of the work holding fixture of the present invention, wherein: the fixing frame penetrates through the connecting hole, vertical rods are symmetrically arranged in the connecting hole, the fixing frame is fixedly connected with the vertical rods, the whole fixing frame is rectangular, an opening is formed in one edge of the fixing frame, and concave frames are arranged at two ends of the opening.

As a preferable aspect of the work holding fixture of the present invention, wherein: the cylinder is arranged in the fixing frame, the tail end of the cylinder is fixedly connected with one side of the fixing frame, which is far away from the concave frame, and the telescopic end penetrates through the connecting hole.

As a preferable aspect of the work holding fixture of the present invention, wherein: the connecting rod is fixedly connected with the telescopic end of the air cylinder, and the length of the connecting rod is greater than the distance between the two concave frames; the top of the connecting rod is symmetrically provided with a first rotating rod, one end of the first rotating rod is rotatably connected with the right angle of the concave frame on the fixing frame, and the other end of the first rotating rod is rotatably connected with the end part of the connecting rod; a second rotating rod is symmetrically arranged at the bottom of the connecting rod, one end of the second rotating rod is rotatably connected with the clamping hand, and the other end of the second rotating rod is rotatably connected with the end of the connecting rod; the first rotating rod and the second rotating rod are in the same vertical direction with the connecting rod at the positions where the connecting rod is rotatably connected, and the horizontal sections of the first rotating rod and the second rotating rod are obtuse angles.

As a preferable aspect of the work holding fixture of the present invention, wherein: the tong symmetry set up in the concave frame, including anchor clamps and with the telescopic link that anchor clamps are connected, the telescopic link passes concave frame and at its inside sliding connection, telescopic link vertical cross-section is the polygon, telescopic link length exceedes distance between the concave frame, the second dwang rotates with the junction of anchor clamps and telescopic link and is connected.

As a preferable aspect of the work holding fixture of the present invention, wherein: the clamp is connected with the telescopic rod through threads, and different types of clamps can be replaced according to the shape of a workpiece.

The invention has the beneficial effects that:

the workpiece clamping and fixing device has the functions of up-and-down floating and clamping, can have wide adaptability when clamping workpieces of different types, reduces the modification cost by changing the specification and the type of the clamp instead of the clamping device, reduces the modification difficulty, improves the working efficiency, and facilitates subsequent maintenance and upgrading because resources are only required to be input on the specification and the shape of the clamp for subsequent modification.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a side view of the overall construction of the workpiece holding fixture of the present invention.

Fig. 2 is a side view showing the overall structure of the work holding fixture of the present invention.

FIG. 3 is a schematic view of a positioning member of the workpiece clamping and fixing device of the present invention.

Fig. 4 is a rear view of the overall structure of the workpiece holding fixture of the present invention.

FIG. 5 is a top view of a retaining assembly of the workpiece holding fixture of the present invention.

Fig. 6 is a bottom view of the retaining member of the workpiece holding fixture of the present invention.

The device comprises a moving assembly 100, a fixing assembly 200, a moving frame 101, a buffer member 102, a positioning member 103, a fixing frame 201, an air cylinder 202, a connecting rod 203, a clamping handle 204, a connecting hole 101a, a balancing weight 101b, a fixing plate 102a, a movable plate 102b, a sliding rod 102c, a spring 102d, a limiting rod 102e, a fixing seat 103a, a cross rod 103b, a moving positioning plate 103c, a damping spring 103d, a vertical rod 201a, a concave frame 201b, a first rotating rod 203a, a second rotating rod 203b, a clamp 204a and an expansion rod 204 b.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Example 1

Referring to fig. 1 and 2, for the first embodiment of the present invention, a workpiece clamping and fixing device is provided, which comprises a moving assembly 100 and a fixing assembly 200, wherein the moving assembly 100 comprises a moving frame 101, a buffer 102 disposed on the moving frame 101, and a positioning member 103; the fixing assembly 200 is arranged on the movable frame 101 and comprises a fixing frame 201, an air cylinder 202 arranged in the fixing frame 201, a connecting rod 203 connected with the air cylinder 202, and a clamping handle 204 movably connected with the connecting rod 203.

The moving assembly 100 is used for moving the fixing device to enable the fixing device to float up and down, the moving frame 101 bears the whole fixing device, and the moving frame 101 also bears the buffer 102 and the positioning piece 103; the buffer piece 102 is used for relieving downward pressure in the descending process of the fixing device, the positioning piece 103 is used for making initial contact with a workpiece and providing the position of the workpiece of the fixing device, the fixing assembly 200 clamps the workpiece, and the fixing frame 201 is used for bearing other parts of the fixing assembly 200 and is fixedly combined with the moving assembly 100; the air cylinder 202 provides clamping force and controls the clamping function of the device; the connecting rod 203 connects the cylinder 202 and the clamping hand 204, and converts the thrust of the cylinder 202 into the clamping force of the clamping hand 204; the gripper 204 is used to grip a workpiece.

Example 2

Referring to fig. 3, a second embodiment of the present invention, which is different from the first embodiment, is: the center of the movable frame 101 is provided with a connecting hole 101a, and the side wall is provided with a plurality of balancing weights 101 b. The buffer 102 includes a fixed plate 102a and a movable plate 102b, the fixed plate 102a is fixedly connected to the movable frame 101 and vertically disposed on a sidewall of the movable frame 101, and the movable plate 102b is parallel to the fixed plate 102 a.

Sliding rods 102c are symmetrically arranged between the fixed plate 102a and the movable plate 102b, the fixed plate 102a is fixedly connected with the sliding rods 102c, the movable plate 102b is slidably connected with the sliding rods 102c, a spring 102d is sleeved outside the sliding rods 102c, the spring 102d is arranged between the fixed plate 102a and the movable plate 102b, and a plurality of limiting rods 102e are further arranged between the fixed plate 102a and the movable plate 102 b. The positioning member 103 is disposed at the bottom of the fixing plate 102a, and includes fixing seats 103a symmetrically disposed at the bottom of the fixing plate 102a, a cross rod 103b is connected between the fixing seats 103a, a movable positioning plate 103c is slidably connected to the cross rod 103b, a damping spring 103d is disposed in a gap between the movable positioning plate 103c and the fixing seat 103a, and the damping spring 103d is sleeved outside the cross rod 103 b.

Compared with the embodiment 1, further, the movable frame 101 is provided with the counterweight 101b, so that the self weight of the movable frame is increased, and the stability of the device is improved; a sliding rod 102c is arranged between the fixed plate 102a and the movable plate 102b, one end of the sliding rod 102c is fixed with the fixed plate 102a, and the other end is connected with the movable plate 102b in a sliding manner; the stopper rod 102e can function as a guide rail for the sliding direction of the movable plate 102 b; when the fixing device is pressed downwards to contact with the workpiece, the movable plate 102b can press the spring 102d to buffer the downward pressure, so that the workpiece is protected from being crushed.

Furthermore, the positioning element 103 is disposed below the fixing plate 102a, and the fixing device is clamped by lowering the fixing device until the positioning plate 103c contacts with the workpiece, and the buffer element 102 relieves the lowered pressure to prevent the workpiece from being crushed, and at this time, the positioning plate 103c positions the workpiece in the working range of the clamping tool, and the workpiece is clamped by the fixing element 200.

Furthermore, the fixed seat 103a is used for bearing the movable positioning plate 103c, the movable positioning plate 103c can slide between the cross rods 103b, and damping springs 103d are arranged on two sides of the movable positioning plate 103c, so that vibration dislocation caused by floating of the movable positioning plate 103c is reduced; moving the positioning plate 103c provides a preliminary positioning of the workpiece.

The rest of the structure is the same as that of embodiment 1.

Example 3

Referring to fig. 4, 5 and 6, a third embodiment of the present invention, which differs from the second embodiment, is: the fixing frame 201 penetrates through the connecting hole 101a, vertical rods 201a are symmetrically arranged in the connecting hole 101a, the fixing frame 201 is fixedly connected with the vertical rods 201a, the whole fixing frame 201 is rectangular, an opening is formed in one side of the fixing frame, and concave frames 201b are arranged at two ends of the opening. The cylinder 202 is disposed inside the fixing frame 201, and the tail end thereof is fixedly connected to one side of the fixing frame 201 away from the concave frame 201b, and the telescopic end thereof passes through the connecting hole 101 a.

The connecting rod 203 is fixedly connected with the telescopic end of the cylinder 202, and the length of the connecting rod is greater than the distance between the two concave frames 201 b; the top of the connecting rod 203 is symmetrically provided with a first rotating rod 203a, one end of the first rotating rod 203a is rotatably connected with the right angle of the concave frame 201b on the fixing frame 201, and the other end is rotatably connected with the end part of the connecting rod 203; a second rotating rod 203b is symmetrically arranged at the bottom of the connecting rod 203, one end of the second rotating rod 203b is rotatably connected with the clamping hand 204, and the other end is rotatably connected with the end of the connecting rod 203; the positions where the first rotating rod 203a and the second rotating rod 203b are rotatably connected with the connecting rod 203 are in the same vertical direction, and the horizontal section of the first rotating rod 203a and the horizontal section of the second rotating rod 203b form an obtuse angle.

The clamping arms 204 are symmetrically arranged in the concave frame 201b and comprise a clamp 204a and a telescopic rod 204b connected with the clamp 204a, the telescopic rod 204b penetrates through the concave frame 201b and is connected with the concave frame in a sliding mode, the vertical section of the telescopic rod 204b is polygonal, the length of the telescopic rod 204b exceeds the distance between the concave frames 201b, and the second rotating rod 203a is connected with the connecting position of the clamp 204a and the telescopic rod 204b in a rotating mode. The clamp 204a is connected with the telescopic rod 204b through threads, and different types of clamps 204a can be replaced according to the shape of a workpiece.

Compared with the embodiment 2, further, the fixing frame 201 is fixed inside the connecting hole 101a through the vertical rod 201a, the air cylinder 202 is fixed inside the fixing frame 201, and the telescopic end of the air cylinder can penetrate through the connecting hole 101a to push the connecting rod 203 to move back and forth; the first rotating rod 203a is rotatably connected with the concave frame 201b on the connecting rod 203, the second rotating rod 203b is connected with the clamping hand 204, when the cylinder 202 pushes the connecting rod 203, one side of the first rotating rod 203a is connected with the concave frame 201b, the concave frame 201b is a peripheral fixing frame 201 and cannot be pushed, but the connecting rod 203 moves to cause the obtuse angle formed by the first rotating rod 203a and the second rotating rod 203b to be continuously increased, further, the distance between the first rotating rod 203a and the second rotating rod 203b is increased, the first rotating rod 203a cannot be outwards unfolded, so the second rotating rod 203b tends to be parallel to the connecting rod 203 continuously, the distance between the clamping hand 204 connected with the second rotating rod 203a is reduced continuously, namely, the clamping hand 204 is close to clamp a workpiece continuously, and only the cylinder 202 needs to retract the connecting rod 203 if the workpiece needs to be loosened.

Telescopic link 204b on tong 204 can slide in concave frame 201b, second dwang 203a promotes tong 204 and is close to actually for promoting telescopic link 204b and slides in concave frame 201b, telescopic link 204b vertical section sets up to the polygon and can makes anchor clamps 204a stabilize centre gripping work piece, can not be because of gravity at concave frame 201b internal rotation, it is unstable to lead to the centre gripping, threaded connection can conveniently change the model specification of anchor clamps 204a between anchor clamps 204a and the telescopic link 204b, satisfy more production needs.

The rest of the structure is the same as that of embodiment 2.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A workpiece clamping and fixing device is characterized in that: comprises that

The moving assembly (100) comprises a moving frame (101), a buffer member (102) arranged on the moving frame (101) and a positioning member (103);

the fixing assembly (200) is arranged on the moving frame (101) and comprises a fixing frame (201), an air cylinder (202) arranged in the fixing frame (201), a connecting rod (203) connected with the air cylinder (202) and a clamping hand (204) movably connected with the connecting rod (203).

2. The workpiece holding fixture of claim 1, wherein: a connecting hole (101 a) is formed in the center of the moving frame (101), and a plurality of balancing weights (101 b) are arranged on the side wall of the moving frame.

3. The workpiece holding fixture of claim 1 or 2, wherein: the buffer member (102) comprises a fixed plate (102 a) and a movable plate (102 b), the fixed plate (102 a) is fixedly connected with the movable frame (101) and is vertically arranged on the side wall of the movable frame (101), and the movable plate (102 b) is arranged in parallel with the fixed plate (102 a).

4. A workpiece holding fixture as recited in claim 3, wherein: sliding rods (102 c) are symmetrically arranged between the fixed plate (102 a) and the movable plate (102 b), the fixed plate (102 a) is fixedly connected with the sliding rods (102 c), the movable plate (102 b) is slidably connected with the sliding rods (102 c), a spring (102 d) is sleeved outside the sliding rods (102 c), the spring (102 d) is arranged between the fixed plate (102 a) and the movable plate (102 b), and a plurality of limiting rods (102 e) are further arranged between the fixed plate (102 a) and the movable plate (102 b).

5. The workpiece holding fixture of claim 4, wherein: the positioning piece (103) is arranged at the bottom of the fixing plate (102 a) and comprises fixing seats (103 a) symmetrically arranged on the bottom of the fixing plate (102 a), a cross rod (103 b) is connected between the fixing seats (103 a), a movable positioning plate (103 c) is connected on the cross rod (103 b) in a sliding mode, a damping spring (103 d) is arranged in a gap between the movable positioning plate (103 c) and the fixing seats (103 a), and the damping spring (103 d) is sleeved outside the cross rod (103 b).

6. The workpiece holding fixture of claim 2, wherein: the fixing frame (201) penetrates through the connecting hole (101 a), vertical rods (201 a) are symmetrically arranged in the connecting hole (101 a), the fixing frame (201) is fixedly connected with the vertical rods (201 a), the whole fixing frame (201) is rectangular, an opening is formed in one edge of the fixing frame, and concave frames (201 b) are arranged at two ends of the opening.

7. The workpiece holding fixture of claim 6, wherein: the cylinder (202) is arranged in the fixing frame (201), the tail end of the cylinder is fixedly connected with one side, far away from the concave frame (201 b), of the fixing frame (201), and the telescopic end penetrates through the connecting hole (101 a).

8. The workpiece holding fixture of claim 7, wherein: the connecting rod (203) is fixedly connected with the telescopic end of the air cylinder (202), and the length of the connecting rod is greater than the distance between the two concave frames (201 b); the top of the connecting rod (203) is symmetrically provided with a first rotating rod (203 a), one end of the first rotating rod (203 a) is rotatably connected with the right angle of the concave frame (201 b) on the fixing frame (201), and the other end of the first rotating rod (203 a) is rotatably connected with the end part of the connecting rod (203); a second rotating rod (203 b) is symmetrically arranged at the bottom of the connecting rod (203), one end of the second rotating rod (203 b) is rotatably connected with the clamping hand (204), and the other end of the second rotating rod (203 b) is rotatably connected with the end of the connecting rod (203); first dwang (203 a) and second dwang (203 b) are in same vertical direction with the position that connecting rod (203) rotate to be connected, first dwang (203 a) and second dwang (203 b) horizontal cross-section are the obtuse angle.

9. The workpiece holding fixture of claim 8, wherein: tong (204) symmetry set up in concave frame (201 b), including anchor clamps (204 a) and with telescopic link (204 b) that anchor clamps (204 a) are connected, telescopic link (204 b) pass concave frame (201 b) and at its inside sliding connection, telescopic link (204 b) vertical section is the polygon, telescopic link (204 b) length exceedes distance between concave frame (201 b), second dwang (203 a) rotates with the junction of anchor clamps (204 a) and telescopic link (204 b) and is connected.

10. The workpiece holding fixture of claim 9, wherein: the clamp (204 a) is connected with the telescopic rod (204 b) through threads, and different types of clamps (204 a) can be replaced according to the shape of a workpiece.