A clamping mechanism

Abstract

The present invention relates to the technical field of workpiece clamping, and in particular to a clamping mechanism, wherein the shaft of a rotating shaft is connected to a bearing seat through a bearing, an end cover is arranged at one end of the rotating shaft, a fixed seat is locked on the end cover, and more than two clips are enclosed together to form a clamping part for clamping the workpiece, one end of the clip is fixed on the fixed seat, and the clips are connected by a first spring to realize the expandability of the clamping part, the rod body of a push rod freely passes through the interior of the rotating shaft, the interior of the end cover and the fixed seat, a shaft shoulder is arranged on the rod body of the push rod, a second spring is sleeved on the rod body of the push rod, the second spring is arranged between the shaft shoulder and the end cover, a retaining spring is fixed on the inner wall of the rotating shaft, the shaft shoulder is limited on one side of the retaining spring, the second spring and the retaining spring are arranged on both sides of the shaft shoulder, when the piston rod of the cylinder pushes the push rod to move, the end of the push rod is inserted into the clamping part to realize the loosening of the workpiece; when the piston rod of the cylinder is retracted, the end of the push rod is away from the clamping part to realize the clamping of the workpiece, and the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece clamping, in particular to a clamping mechanism. Background Art

[0002] In the mechanical processing industry, when performing operations such as brushing glue on a workpiece, the workpiece needs to be clamped and fixed first. In the prior art, manual cooperation is required when clamping the workpiece using a clamping mechanism, which wastes manpower, has low clamping efficiency, and affects production efficiency. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a clamping mechanism to realize automatic clamping of workpieces and improve efficiency.

[0004] The technical solution adopted by the present invention is as follows: a clamping mechanism includes a cylinder, a push rod, a hollow rotating shaft, a fixed seat and a clamping piece, the shaft body of the rotating shaft is connected to the bearing seat through a bearing, an end cover is arranged at one end of the rotating shaft, the fixed seat is locked on the end cover, there are more than two clamping pieces, all of which are enclosed together to form a clamping part for clamping a workpiece, one end of the clamping piece is fixed on the fixed seat, and the clamping pieces are connected by a first spring to realize the expansion of the clamping part, the rod body of the push rod freely passes through the interior of the rotating shaft, the interior of the end cover and the fixed seat, and a shaft is arranged on the rod body of the push rod A shoulder is provided on the rod body of the push rod, and the second spring is arranged between the shaft shoulder and the end cover. A retaining spring is fixed on the inner wall of the rotating shaft, and the shaft shoulder is limited on one side of the retaining spring. The second spring and the retaining spring are arranged on both sides of the shaft shoulder. The cylinder and the push rod are arranged on the same straight line with intervals. When the piston rod of the cylinder pushes the push rod to move, the end of the push rod is inserted into the clamping part to realize the expansion of the clamping part and the loosening of the workpiece, and the second spring is compressed; when the piston rod of the cylinder is retracted, the second spring is reset, so that the end of the push rod is away from the clamping part to realize the contraction of the clamping part and the clamping of the workpiece.

[0005] As a further improvement of the above technical solution:

[0006] A single clip is in the shape of a strip, and the length direction of the clip is the same as the length direction of the top rod. There are 4 clips and they are arranged at intervals in the circumferential direction, wherein the plate surfaces of two clips are on the first plane, and the plate surfaces of the other two clips are on the second plane, the first plane and the second plane are perpendicular, and a connecting rod is vertically fixed on the inner end plate surface of each clip, and the connecting rod is fixed to the fixing seat by screws, and the outer ends of the two clips located on the first plane are circumferentially enclosed relative to the side walls and the outer ends of the two clips located on the second plane are circumferentially enclosed relative to the side walls to form a clamping portion.

[0007] The number of the first springs is 4, and the first support rods are vertically fixed on the two clips located on the first plane, and the two first springs are connected between the two first support rods. The second support rods are vertically fixed on the two clips located on the second plane, and the two first springs are connected between the two second support rods.

[0008] The outer edges of the four clips are respectively provided with avoidance notches for the first spring to pass through.

[0009] The fixing seat is in the shape of a hollow shaft, and one end of the fixing seat is fixed to the end cover through a flange cover. Four first channels are opened on the shaft body of the fixing seat, and the four first channels are arranged circumferentially at intervals. The four first channels are radially connected to the inner hollow part of the fixing seat, and the four clips are distributed in the four first channels one by one. The four first channels extend to the outer end surface of the fixing seat. Two annular avoidance grooves are opened on the shaft body of the fixing seat, and two first support rods and two connected first springs are arranged in one of the avoidance grooves, and two second support rods and two connected first springs are arranged in the other avoidance groove.

[0010] The beneficial effects of the present invention are as follows: the present invention has a simple structure and is easy to operate. The present invention controls the expansion of the clamping part by pushing the push rod through the cylinder, and controls the contraction of the clamping part through the elastic reset of the second spring, thereby realizing automatic clamping and releasing of the workpiece, greatly improving the clamping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present invention.

[0012] Figure 2 It is a structural diagram of the cooperation between the fixing seat and the ejector rod of the present invention.

[0013] Figure 3 It is a structural diagram of the cooperation between the clip and the ejector rod of the present invention.

[0014] Figure 4 It is a structural diagram of a fixing seat of the present invention.

[0015] Figure 5 It is a structural diagram of the four clip connections of the present invention.

[0016] Among them: 10, cylinder; 20, push rod; 21, shoulder; 30, rotating shaft; 40, fixed seat; 41, first channel; 42, avoidance groove; 50, clip; 51, avoidance gap; 60, end cover; 70, workpiece; 80, first spring; 90, second spring; 100, retaining ring; 110, bearing seat; 120, connecting rod; 130, first support rod; 140, second support rod. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0018] like Figure 1-5 As shown, the clamping mechanism of this embodiment includes a cylinder 10, a push rod 20, a hollow rotating shaft 30, a fixed seat 40 and a clip 50. The shaft of the rotating shaft 30 is connected to the bearing seat 110 through a bearing. An end cover 60 is arranged at one end of the rotating shaft 30. The fixed seat 40 is locked on the end cover 60. There are more than two clips 50. All the clips 50 are enclosed together to form a clamping part for clamping a workpiece 70. One end of the clip 50 is fixed on the fixed seat 40. The clips 50 are connected by a first spring 80 to realize the expandability of the clamping part. The rod body of the push rod 20 freely passes through the interior of the rotating shaft 30, the interior of the end cover 60 and the fixed seat 40. A shaft shoulder 21 is arranged on the rod body of the push rod 20. A second spring 90 is sleeved on the rod body of 20, and the second spring 90 is arranged between the shoulder 21 and the end cover 60. A retaining spring 100 is fixed on the inner wall of the rotating shaft 30, and the shoulder 21 is limited to one side of the retaining spring 100. The second spring 90 and the retaining spring 100 are arranged on both sides of the shoulder 21. The cylinder 10 and the push rod 20 are arranged at intervals on the same straight line. When the piston rod of the cylinder 10 pushes the push rod 20 to move, the end of the push rod 20 is inserted into the clamping part to realize the expansion of the clamping part and the loosening of the workpiece 70, and the second spring 90 is compressed; when the piston rod of the cylinder 10 is retracted, the second spring 90 is reset, so that the end of the push rod 20 is away from the clamping part to realize the contraction of the clamping part and the clamping of the workpiece 70.

[0019] When installing the present application, the cylinder 10 and the bearing seat 110 can be fixed on the mounting frame at the work site respectively. During actual work, the rotating shaft 30 needs to rotate. The synchronous wheel is installed on the rotating shaft 30 and driven by the synchronous wheel to rotate. The rotation of the rotating shaft 30 drives the workpiece 70 to rotate, so as to facilitate the gluing treatment on all sides of the workpiece. The cylinder 10 and the rotating shaft 30 are not connected. When the rotating shaft 30 rotates, the cylinder 10 is fixed, but the cylinder 10 and the push rod 20 are arranged on the same straight line at a distance, so the rotation of the rotating shaft 30 at any angle will not affect the push of the piston rod of the cylinder 10 on the push rod 20. The present application controls the expansion of the clamping part by pushing the push rod 20 by the cylinder 10, and controls the contraction of the clamping part by the elastic reset of the second spring 90, so as to realize the automatic clamping and loosening of the workpiece 70, and greatly improve the clamping efficiency.

[0020] A single clip 50 is in the shape of a strip, and the plate length direction of the clip 50 is the same as the rod length direction of the top rod 20. The number of clips 50 is 4 and they are arranged at intervals in the circumferential direction, wherein the plate surfaces of two clips 50 are on the first plane, and the plate surfaces of the other two clips 50 are on the second plane, the first plane and the second plane are perpendicular, and a connecting rod 120 is vertically fixed on the inner end plate surface of each clip 50, and the connecting rod 120 is fixed to the fixing seat 40 by screws, and the outer ends of the two clips 50 located on the first plane and the outer ends of the two clips 50 located on the second plane are circumferentially enclosed together to form a clamping portion.

[0021] The number of first springs 80 is 4, and the first support rods 130 are vertically fixed on the two clips 50 located on the first plane, and the two first springs 80 are connected between the two first support rods 130; the second support rods 140 are vertically fixed on the two clips 50 located on the second plane, and the two first springs 80 are connected between the two second support rods 140.

[0022] The outer edges of the four clips 50 are respectively provided with escape notches 51 for the first spring 80 to pass through. The arrangement of the escape notches 51 makes the entire structure more compact.

[0023] The fixing seat 40 is in the shape of a hollow shaft, one end of which is fixed to the end cover 60 through a flange cover, and four first channels 41 are provided on the shaft of the fixing seat 40, and the four first channels 41 are arranged at intervals in the circumferential direction, and the four first channels 41 are respectively radially connected to the inner hollow part of the fixing seat 40, and the four clips 50 are respectively distributed in the four first channels 41 in a one-to-one correspondence, and the four first channels 41 extend to the outer end surface of the fixing seat 40, and two annular avoidance grooves 42 are provided on the shaft of the fixing seat 40, and two first support rods 130 and two connected first springs 80 are arranged in one of the avoidance grooves 42, and two second support rods 140 and two connected first springs 80 are arranged in the other avoidance groove 42. The arrangement of the four first channels 41 and the two avoidance grooves 42 ensures that the fixing seat 40 will not restrict the contraction and movement of the four clips 50.

[0024] When the workpiece 70 needs to be clamped, the cylinder 10 is first started, the piston rod of the cylinder 10 pushes the push rod 20 forward, the second spring 90 is compressed, the front end of the push rod 20 is inserted between the four clips 50, the four clips 50 are spread apart by the push rod 20 and move away from each other, the first spring 80 is stretched, the clamping part is expanded, and the workpiece 70 is inserted into the clamping part by the manipulator, and then the piston rod of the cylinder 10 is controlled to be retracted, the piston rod and the push rod 20 are separated, the second spring 90 is elastically reset, so that the push rod 20 is withdrawn from between the four clips 50, and the four clips 50 are close to each other due to the elastic reset of the first spring 80, that is, the clamping part is contracted, and the workpiece 70 is clamped and fixed, completing the entire clamping action. The entire process is automated, and the clamping efficiency is improved.

[0025] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A clamping mechanism, characterized in that: The invention comprises a cylinder (10), a push rod (20), a hollow rotating shaft (30), a fixing seat (40) and a clamping piece (50); the shaft body of the rotating shaft (30) is connected to a bearing seat (110) via a bearing; an end cover (60) is arranged at one end of the rotating shaft (30); the fixing seat (40) is locked on the end cover (60); there are more than two clamping pieces (50); all the clamping pieces (50) are enclosed together to form a clamping part for clamping a workpiece (70); one end of the clamping piece (50) is fixed on the fixing seat (40); the clamping pieces (50) are connected by a first spring (80) to realize the expansion of the clamping part; the shaft body of the push rod (20) freely passes through the interior of the rotating shaft (30), the interior of the end cover (60) and the fixing seat (40); a shaft shoulder (21) is arranged on the shaft body of the push rod (20); A second spring (90) is sleeved on the rod body, and the second spring (90) is arranged between the shaft shoulder (21) and the end cover (60). A retaining spring (100) is fixed on the inner wall of the rotating shaft (30), and the shaft shoulder (21) is limited on one side of the retaining spring (100). The second spring (90) and the retaining spring (100) are arranged on both sides of the shaft shoulder (21). The cylinder (10) and the push rod (20) are arranged at intervals on the same straight line. When the piston rod of the cylinder (10) pushes the push rod (20) to move, the end of the push rod (20) is inserted into the clamping part to realize the expansion of the clamping part and the loosening of the workpiece (70), and the second spring (90) is compressed; when the piston rod of the cylinder (10) is retracted, the second spring (90) is reset, so that the end of the push rod (20) is away from the clamping part to realize the contraction of the clamping part and the clamping of the workpiece (70); The fixing seat (40) is in the shape of a hollow shaft. One end of the fixing seat (40) is fixed to the end cover (60) through a flange cover. Four first channels (41) are provided on the shaft of the fixing seat (40). The four first channels (41) are arranged at intervals in the circumferential direction. The four first channels (41) are respectively radially connected to the inner hollow part of the fixing seat (40). The four clips (50) are respectively distributed in the four first channels (41) in a one-to-one correspondence. The number of the first springs (80) is four, and the first support rods (130) are respectively vertically fixed on the two clips (50) located on the first plane, and the two first springs (80) are connected between the two first support rods (130); the second support rods (140) are respectively vertically fixed on the two clips (50) located on the second plane, and the two first springs (80) are connected between the two second support rods (140).

2. The clamping mechanism according to claim 1, characterized in that: A single clip (50) is in the shape of a strip, and the plate length direction of the clip (50) is the same as the rod length direction of the top rod (20). The number of clips (50) is 4 and they are arranged at intervals in the circumferential direction, wherein the plate surfaces of two clips (50) are on a first plane, and the plate surfaces of the other two clips (50) are on a second plane, the first plane and the second plane are perpendicular, and a connecting rod (120) is vertically fixed on the inner end plate surface of each clip (50), and the connecting rod (120) is fixed to the fixing seat (40) by screws, and the outer ends of the two clips (50) located on the first plane are opposite to the side walls, and the outer ends of the two clips (50) located on the second plane are circumferentially enclosed together to form a clamping portion.

3. The clamping mechanism according to claim 2, characterized in that: The outer edges of the four clips (50) are respectively provided with avoidance notches (51) for the first spring (80) to pass through.

4. The clamping mechanism according to claim 3, characterized in that: The four first channels (41) extend to the outer end surface of the fixing seat (40), and two annular avoidance grooves (42) are provided on the shaft of the fixing seat (40). The two first support rods (130) and the two connected first springs (80) are arranged in one of the avoidance grooves (42), and the two second support rods (140) and the two connected first springs (80) are arranged in the other avoidance groove (42).

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