Cam lever type positioning pin puller

Abstract

The utility model discloses a cam lever type positioning pin puller which comprises a cam, a lever, a supporting frame, a movable frame and a screw. The supporting frame comprises a bottom plate and two supporting plates arranged in parallel, the supporting plates are perpendicular to the bottom plate, and through holes are formed in the bottom plate. The movable frame can move perpendicular to the bottom plate of the supporting frame, the upper end of the screw is supported on the movable frame, and the lower end of the screw extends out of the bottom plate. The cam is arranged between the bottom plate and the movable frame, and one end of the lever is connected with the cam. The device is simple in structure and low in cost; according to the utility model, the cam is rotated, so that the positioning pin to be pulled out is slowly taken out, the damage of connecting threads is avoided, the scrapping or damage of parts in assembly is prevented, and the economic loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pin pullers, and in particular relates to a cam lever type positioning pin puller. Background Art

[0002] In the assembly of various parts of the machine, for the assembly of integrated transmission parts with high position precision, the position accuracy and reset assembly accuracy are very important, which directly affects the operating efficiency and quality of the transmission. However, it is very troublesome to remove the positioning pin. The existing pin puller uses the impact force of the heavy hammer 6 to remove the positioning pin 7. Figure 1 Shown, weight 6 is arranged on pin pulling rod 8. It is very large because instantaneous impact force, very easily causes the damage of connecting thread, and dowel pin can't be taken out, makes the parts in assembling scrapped or damaged, causes larger economic loss. Summary of the Invention

[0003] In order to solve the above technical problems, the utility model provides a cam lever type positioning pin extractor which has a simple structure, low cost and will not cause the parts in assembly to be scrapped or damaged.

[0004] The technical solution adopted by the utility model is: a cam-lever type positioning pin extractor, comprising a cam, a lever, a support frame, a movable frame and a screw; the support frame comprises a base plate and two parallel supporting plates, the support plates are arranged perpendicular to the base plate, and the base plates are provided with through holes; the movable frame can move perpendicular to the base plate of the support frame, the upper end of the screw is supported on the movable frame, and the lower end of the screw extends out of the base plate; the cam is placed between the base plate and the movable frame, and one end of the lever is connected to the cam.

[0005] Furthermore, the two support plates of the support frame are respectively provided with a plurality of guide holes, and the length direction of the guide holes is perpendicular to the base plate; the two ends of the movable frame are respectively provided with a plurality of guide parts, and the guide parts are placed in the corresponding guide holes; the middle part of the movable frame is provided with a screw hole; the upper end of the screw is provided with a screw head, the screw head is supported on the movable frame, and the lower end of the screw passes through the screw hole to realize the connection between the screw and the movable frame.

[0006] Furthermore, the cam includes two cam plates, which are arranged in parallel and connected by two connecting rods I. A connecting rod II is provided on each of the two cam plates on their opposite sides, and a lever hole is provided on the connecting rod II, and the axis of the lever hole is perpendicular to the connecting rod II.

[0007] The two support plates are respectively provided with two arc-shaped holes, the two connecting rods I respectively pass through the two support plates respectively provided with two arc-shaped holes, and the two cam plates are respectively located on the outside of the two support plates; the movable frame is respectively provided with a support part corresponding to the two cam plates; the cam plate is located between the corresponding support part and the base plate.

[0008] Furthermore, the angle between the line connecting the lowest point and the highest point of the cam and the line connecting the centers of the two connecting rods 1 is 45 degrees.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The utility model has a simple structure and low cost; the utility model can slowly remove the positioning pin to be pulled out by rotating the cam, without causing damage to the connecting thread, thus preventing the parts from being scrapped or damaged during assembly and reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an existing heavy hammer type pin puller structural diagram.

[0012] Figure 2 It is a structural diagram of the present utility model.

[0013] Figure 3 It is a front view of the cam of the present utility model.

[0014] Figure 4 It is a three-dimensional diagram of the cam of the present utility model.

[0015] Figure 5 It is a three-dimensional diagram of the support frame of the present utility model.

[0016] Figure 6 It is a three-dimensional diagram of the movable frame of the present utility model. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figure 2-6 As shown, the utility model includes a cam 1, a lever 2, a support frame 3, a movable frame 4 and a screw rod 5.

[0019] The support frame 3 includes a base plate 31 and two parallel support plates 32. The support plates 32 are arranged perpendicular to the base plate 31. The base plate 31 is provided with a through hole 33 that can accommodate the screw 5. The two support plates 32 of the support frame 3 are each provided with two guide holes 34 (the number of guide holes 34 is not limited to two and can be more than two). The length direction of the guide holes 34 is perpendicular to the base plate 31.

[0020] The cam 1 comprises two cam plates 11, arranged in parallel and connected by two connecting rods I12. A connecting rod II 13 is provided on each of the opposing surfaces of the cam plates 11. The connecting rod II 13 has a lever hole 14, the axis of which is perpendicular to the connecting rod II 13. The two support plates 32 each have two arcuate holes 35, through which the connecting rods I12 pass. The two cam plates 11 are located outside the two support plates 32.

[0021] Two guide parts 41 are respectively provided at both ends of the movable frame 4 (the number of the guide parts 41 is consistent with the number of the guide holes 34), and the guide parts 41 are placed in the corresponding guide holes 34, so that the movable frame can move perpendicular to the base plate 31. A screw hole 42 is provided in the middle of the movable frame 4. A screw head 51 is provided at the upper end of the screw 5, and the screw head 51 is supported on the movable frame. The lower end of the screw 5 passes through the screw hole to realize the connection between the screw and the movable frame 4. A support part 43 is respectively provided on the movable frame 4 corresponding to the two cam plates 11; the cam plate 11 is located between the corresponding support part 43 and the base plate 31. The lower end of the screw 5 extends out of the base plate for connection with the positioning pin to be pulled out. The cam 1 is placed between the base plate 31 and the movable frame 4, and one end of the lever 2 is connected to the cam 1.

[0022] When using the present invention, the base plate 31 is placed on the surface surrounding the locating pin to be removed, and the screw 5 is passed through the screw hole 42 on the movable frame 4 and connected to the internal thread of the locating pin to be removed. At this time, the cam 1 is in the "lowest" position. The handheld lever 2 drives the cam 1 to rotate. The position of the cam 1 gradually pushes the movable frame "up". The movable frame 4 performs a linear motion perpendicular to the base plate on the support frame 3, slowly removing the locating pin to be removed.

Claims

1. A cam lever type positioning pin extractor, characterized by: It includes a cam, a lever, a support frame, a movable frame and a screw; the support frame includes a base plate and two parallel support plates, the support plates are arranged perpendicular to the base plate, and the base plate is provided with a through hole; the movable frame can move perpendicular to the base plate of the support frame, the upper end of the screw is supported on the movable frame, and the lower end of the screw extends out of the base plate; the cam is placed between the base plate and the movable frame, and one end of the lever is connected to the cam.

2. The cam lever type positioning pin extractor according to claim 1, characterized in that: The two support plates of the support frame are respectively provided with multiple guide holes, and the length direction of the guide holes is perpendicular to the bottom plate; multiple guide parts are respectively provided at both ends of the movable frame, and the guide parts are placed in the corresponding guide holes; a screw hole is provided in the middle of the movable frame; a screw head is provided at the upper end of the screw, and the screw head is supported on the movable frame, and the lower end of the screw passes through the screw hole to realize the connection between the screw and the movable frame.

3. The cam lever type positioning pin extractor according to claim 2, characterized in that: The cam comprises two cam plates, which are arranged in parallel and connected by two connecting rods I. A connecting rod II is provided on each of the two cam plates on their opposite sides, and a lever hole is provided on the connecting rod II, the axis of the lever hole being perpendicular to the connecting rod II. The two support plates are respectively provided with two arc-shaped holes, the two connecting rods I respectively pass through the two support plates respectively provided with two arc-shaped holes, and the two cam plates are respectively located on the outside of the two support plates; the movable frame is respectively provided with a support part corresponding to the two cam plates; the cam plate is located between the corresponding support part and the base plate.

4. The cam lever type positioning pin extractor according to claim 3, characterized in that: The angle between the line connecting the lowest point and the highest point of the cam and the line connecting the centers of the two connecting rods 1 is 45 degrees.

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