A riveting fixture

Abstract

The utility model relates to riveting field, concretely relates to a riveting clamp, including bottom plate, pressure equipment plate, reset piece and a plurality of riveting units, reset piece is located between bottom plate and pressure equipment plate, every riveting unit all includes positioning post and pressure head, positioning post is fixedly connected with bottom plate, is equipped with the accommodation hole on the positioning post, the pressure head is fixedly connected with pressure equipment plate and is located the top of positioning post, the distance between at least two adjacent positioning posts is greater than or equal to the diameter of axle body. Adopt this technical scheme, be favorable to the dependence of reducing to clamp precision, be convenient for the processing of clamp.

Description

Technical Field

[0001] This utility model relates to the field of riveting, and specifically to a riveting clamp. Background Technology

[0002] The output shaft gear consists of a shaft body and a disc body. To facilitate subsequent installation and positioning, positioning pins are usually pre-pressed into several stepped holes distributed around the circumference of the disc body, and then the positioning pins are riveted to the disc body through a riveting process.

[0003] Existing riveting fixtures typically include a press-driven pressure plate, several reset components and a pressure head mounted on the pressure plate, and several positioning pins located below the pressure head. During processing, after the press is reset, the pressure plate and pressure head move away from the positioning pins under the action of the reset components, and the output shaft gear is placed from above the positioning pins onto the positioning pins, so that the positioning pins are located at the positioning pins. Then, the pressure head acts downwards to rivet the positioning pins to the disc body.

[0004] However, this approach has the following problem: Since the shaft has a certain length, placing the output shaft gear from above the positioning post onto the positioning post inevitably requires the pressure head to be a considerable distance away from the positioning post. This results in a large gap between the pressure head and the positioning post, i.e., a large space to accommodate the output shaft gear. Consequently, the pressing plate and the pressure head need to move a considerable distance, requiring high precision in fixture processing, which is not conducive to fixture processing. Utility Model Content

[0005] The present invention aims to provide a riveting fixture to reduce the distance between the pressure head and the positioning post, thereby facilitating the processing of the fixture.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a riveting fixture, comprising a base plate, a pressure plate, a reset component, and several riveting units, wherein the reset component is disposed between the base plate and the pressure plate, and each riveting unit comprises a positioning post and a pressure head, wherein the positioning post is fixedly connected to the base plate, and the positioning post is provided with a receiving hole, and the pressure head is fixedly connected to the pressure plate and located above the positioning post, wherein the distance between at least two adjacent positioning posts is greater than or equal to the diameter of the shaft.

[0007] The beneficial effects of this solution are as follows: when the distance between at least two adjacent positioning pins is greater than or equal to the diameter of the shaft, the press plate and press head only need to move a small distance, that is, as long as the distance between the press head and the positioning pin is greater than the sum of the thickness of the disc and the length of the positioning pin extending out of the disc, the shaft of the output shaft gear can be placed between the base plate and the press plate from the side of the adjacent positioning pin. When the positioning pin is aligned with the receiving hole, the positioning pin enters the receiving hole to achieve positioning. Then the press drives the press plate to move and completes the riveting of the positioning pin and the disc through the press head. Since the stroke distance of the power component is shortened, its accuracy is easier to control, and the saved stroke time helps to improve processing efficiency.

[0008] Furthermore, the cross-section of the positioning post is arc-shaped, which includes an arc edge and a chord edge, wherein the chord edges of two adjacent positioning posts are arranged opposite each other and the distance between the chord edges is greater than or equal to the diameter of the shaft.

[0009] The beneficial effects of this solution are as follows: By cutting the larger diameter positioning pins into an arc shape to ensure that the distance between adjacent positioning pins is greater than or equal to the diameter of the shaft, the reason for not directly using positioning pins with a smaller diameter is as follows: First, the positioning pins need to bear force during riveting, and cutting the larger diameter positioning pins into an arc shape makes them less prone to deformation compared to positioning pins with a smaller diameter, which is beneficial to improving their service life; Second, positioning pins are generally interference-fitted with the holes on the base plate, and if positioning pins with a smaller diameter are used, the holes on the base plate are too small to be easily machined; Third, when the shaft of the output shaft gear passes between two positioning pins, the straight chord edge is beneficial to guiding the shaft and making it easier for the positioning pins to enter the receiving hole to complete the positioning.

[0010] Furthermore, the pressure head is provided with riveting holes, which include cylindrical holes and conical holes.

[0011] The beneficial effects of this solution are as follows: after the pressure head with the tapered hole contacts the stepped hole on the disc, the pressure head is conducive to squeezing the material at the stepped part of the disc and making contact with the positioning pin, thereby realizing the riveting of the positioning pin and the disc.

[0012] Furthermore, the diameter of the cylindrical hole is larger than the diameter of the locating pin.

[0013] Furthermore, it also includes a base and a guide shaft. The base plate is fixedly connected to the base, one end of the guide shaft is fixedly connected to the pressure plate, and the other end of the guide shaft passes through the base plate and is slidably connected to the base plate; the reset component is a spring, which is sleeved on the guide shaft.

[0014] Furthermore, a linear bearing is installed on the base plate, and the other end of the guide shaft is slidably connected to the linear bearing. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a diagram showing the positional relationship between the locating pin and the shaft.

[0016] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: base 1, base plate 2, press plate 3, linear bearing 4, spring 5, positioning pin 6, pressure head 7, shaft 8, disc 9, chord edge 10, cylindrical hole 11, tapered hole 12, and positioning pin 13. Detailed Implementation

[0017] Example The basic implementation examples are as follows: Figure 1-3 As shown, Figure 1 The riveting fixture shown includes a base 1, a base plate 2, a pressure plate 3, a guide shaft, and several riveting units. The base plate 2 is fixedly connected to the base 1 by bolts. In this embodiment, there are two guide shafts. The upper end of the guide shaft is fixedly connected to the pressure plate 3 by bolts, and the lower end of the guide shaft passes through the base plate 2 and is slidably connected to the base plate 2. A reset component, which is a spring 5, is sleeved on the guide shaft. The spring 5 is located between the base plate 2 and the pressure plate 3. In order to ensure that the hydraulic press pushes the pressure plate 3 to keep it parallel and descending after contacting the pressure plate 3, a linear bearing 4 is fixedly installed on the base plate 2 by bolts. The lower end of the guide shaft is slidably connected to the linear bearing 4.

[0018] In this embodiment, there are three riveting units. Each riveting unit includes a positioning post 6 and a pressure head 7. The positioning post 6 is fixedly connected to the base plate 2 with an interference fit. The positioning post 6 has a receiving hole. The pressure head 7 is fixedly connected to the pressing plate 3 with an interference fit and is located above the positioning post 6. The three positioning posts 6 are evenly distributed at 120° on the base plate 2, and the three pressure heads 7 are also evenly distributed at 120° on the pressing plate 3. Figure 1 Only one positioning pin 6 and one pressure head 7 are shown in the image.

[0019] The output shaft gear includes a shaft body 8 and a disc body 9. This solution is used to rivet the positioning pin 13 onto the disc body 9. Taking the aforementioned three positioning pins 6 as an example, the distance between at least two adjacent positioning pins 6 is greater than or equal to the diameter of the shaft body 8. That is, it can be that only two of the positioning pins 6 are more than or equal to the diameter of the shaft body 8, or the distance between each pair of the three positioning pins 6 is greater than or equal to the diameter of the shaft body 8. In this embodiment, the former is selected.

[0020] Specifically, such as Figure 3 As shown, the cross-section of the positioning post 6 is arc-shaped, and the arc shape includes an arc edge and a chord edge 10. The chord edges 10 of two adjacent positioning posts 6 are arranged opposite each other and the distance between the chord edges 10 is greater than or equal to the diameter of the shaft body 8. In this way, the shaft body 8 of the output shaft gear can be pushed from between the two positioning posts 6 into the space enclosed by the three positioning posts 6.

[0021] like Figure 1 , 2 As shown, the pressure head 7 has a riveting hole, which includes a cylindrical hole 11 and a conical hole 12. The diameter of the cylindrical hole 11 is larger than the diameter of the positioning pin 13. The disc body 9 has a stepped hole. The pressure head 7 uses the stepped surface of the stepped hole to rivet the positioning pin 13 to the disc body 9. The dimension above the stepped surface of the positioning pin 13 is smaller than the depth of the riveting hole.

[0022] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A riveting clamp, characterized in that: It includes a base plate, a pressure plate, a reset component, and several riveting units. The reset component is located between the base plate and the pressure plate. Each riveting unit includes a positioning post and a pressure head. The positioning post is fixedly connected to the base plate and has a receiving hole. The pressure head is fixedly connected to the pressure plate and is located above the positioning post. The distance between at least two adjacent positioning posts is greater than or equal to the diameter of the shaft.

2. The riveting clamp according to claim 1, characterized in that: The cross-section of the positioning post is arc-shaped, which includes a circular arc edge and a chord edge. The chord edges of two adjacent positioning posts are arranged opposite each other, and the distance between the chord edges is greater than or equal to the diameter of the shaft.

3. A riveting clamp according to claim 2, characterized in that: The pressure head is provided with riveting holes, which include cylindrical holes and conical holes.

4. A riveting clamp according to claim 3, characterized in that: The diameter of the cylindrical hole is larger than the diameter of the locating pin.

5. A riveting clamp according to claim 1 or 4, characterized in that: It also includes a base and a guide shaft. The base plate is fixedly connected to the base, one end of the guide shaft is fixedly connected to the pressure plate, and the other end of the guide shaft passes through the base plate and is slidably connected to the base plate. The reset component is a spring, which is sleeved on the guide shaft.

6. A riveting clamp according to claim 5, characterized in that: A linear bearing is mounted on the base plate, and the other end of the guide shaft is slidably connected to the linear bearing.

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