Arc-shaped end face press-fitting positioning pin device

Abstract

The utility model discloses an arc-shaped end face press-fitting positioning pin device which comprises a shaft sleeve and a pressing head, a mounting hole and a pin hole are formed in the shaft sleeve and communicated, a part of the pressing head is located in the mounting hole, the shaft sleeve is in sliding connection with the pressing head, a limiting mechanism is arranged between the shaft sleeve and the pressing head, and the end, located in the mounting hole, of the pressing head is connected with an ejector pin. The inner ends of the exhaust holes are communicated with the installation hole, the outer ends of the exhaust holes are communicated with the peripheral face of the shaft sleeve, a spring is arranged in the installation hole, one end of the spring abuts against the lower end of the pressing head, and the other end of the spring abuts against the bottom of the installation hole. The positioning pin can be correctly pressed into a product hole, and the phenomenon of pressing deviation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, and more specifically, to a device for pressing and positioning pins on an arc-shaped end face. Background Technology

[0002] Currently, when pressing locating pins onto the curved end face of a product, to ensure that the locating pins are not pressed off, it is necessary to manually hold the locating pin and align it, then use a press to press the locating pin into a certain depth as a pre-pressing process. At this point, the locating pin should not be held by hand anymore. Then, the press is used again to press the locating pin into the product hole. This operation is prone to injury and poses a certain degree of danger. In addition, the process is complicated and the pre-pressing process is easily overlooked, which can cause the locating pins to be pressed off, affecting product quality and even scrapping the product. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an arc-shaped end face press-fitting positioning pin device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses an arc-shaped end face press-fit positioning pin device, including a bushing and a press head. The bushing has a mounting hole and a pin hole, which are connected. A part of the press head is located in the mounting hole. The bushing and the press head are slidably connected. A limit mechanism is provided between the bushing and the press head. A pin is connected to one end of the press head located in the mounting hole. An exhaust hole is provided on the outer periphery of the bushing. The inner end of the exhaust hole is connected to the mounting hole, and the outer end of the exhaust hole is connected to the outer periphery of the bushing. A spring is provided in the mounting hole. One end of the spring abuts against the lower end of the press head, and the other end of the spring abuts against the bottom of the mounting hole.

[0006] Furthermore, the limiting mechanism includes a limiting groove formed on the outer periphery of the pressure head, and a limiting pin inserted into the bushing, with the inner end of the limiting pin extending into the limiting groove.

[0007] Furthermore, the lower end of the pressure head is provided with a threaded hole, the upper end of the ejector pin is provided with an external thread, and the ejector pin and the spring are connected by a thread.

[0008] Furthermore, a through hole is provided on the bushing corresponding to the position of the pin hole, the through hole is connected to the pin hole, and a set screw is installed in the pin hole.

[0009] Furthermore, at least a portion of the ejector pin is located inside the pin hole.

[0010] Furthermore, the ejector pin and the pin hole are fitted with a clearance.

[0011] The advantages of this utility model are: it eliminates the process of manually holding the positioning pin during the pre-pressing process, and the entire pressing action is completed continuously, with high safety performance and high pressing efficiency; the positioning pin will not be deviated during the pressing process, and the pressing accuracy is high. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a structure of the arc-shaped end face press-fit positioning pin device in this embodiment;

[0013] Figure 2 This is a schematic diagram of the internal structure of the arc-shaped end face press-fitting positioning pin device in this embodiment;

[0014] Figure 3 This is a schematic diagram of the arc-shaped end face pressing positioning pin device before pressing in this embodiment;

[0015] Figure 4 This is a schematic diagram of the press-fitted structure of the arc-shaped end face pressing positioning pin device in this embodiment.

[0016] Reference numerals in the attached diagram: 1. Pressure head; 2. Limiting groove; 3. Limiting pin; 4. Bushing; 5. Spring; 6. Vent hole; 7. Ejector pin; 8. Ejector screw; 9. Positioning pin; 10. Pin hole; 11. Product. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1 As shown in the figure, an arc-shaped end face press-fit positioning pin device includes a press head 1 and a bushing 4. The bushing 4 has a mounting hole and a pin hole 10, which are connected. The upper end of the mounting hole connects to the upper end of the bushing 4, and the lower end of the pin hole 10 connects to the lower end of the bushing 4. The lower end of the press head 1 is inserted into the mounting hole, and the press head 1 and the bushing 4 are in a sliding fit with a clearance. A spring 5 is installed in the mounting hole, with one end of the spring 5 abutting against the lower end face of the press head 1 and the other end abutting against the bottom of the mounting hole. A ejector pin 7 is connected to the lower end of the press head 1, and the ejector pin 7 is in a clearance fit with the pin hole 10. At least a portion of the ejector pin 7 is located within the pin hole 10 to ensure the accuracy of the ejector pin 7's descent position and prevent deflection.

[0019] The lower end of the pressure head 1 has a threaded hole, and the upper end of the ejector pin 7 has an external thread. The ejector pin 7 and the spring 5 are connected by threads. The same model of positioning pin 9 can be pressed into different products 11. If the depth requirements are different, only the ejector pin 7 of the corresponding length needs to be replaced, which has good versatility.

[0020] A limiting mechanism is provided between the pressure head 1 and the bushing 4. The limiting mechanism includes a limiting groove 2 formed on the outer periphery of the pressure head 1, and a limiting pin 3 inserted into the bushing 4, with the inner end of the limiting pin 3 extending into the limiting groove 2. Through the cooperation of the limiting groove 2 and the limiting pin 3, the bushing 4 is ensured not to fall off the pressure head 1.

[0021] The limiting groove 2 has several grooves, and the limiting groove 2 is arranged along the axial direction of 91.

[0022] The bushing 4 has an exhaust hole 6 on its outer periphery. The inner end of the exhaust hole 6 is connected to the mounting hole, and the outer end of the exhaust hole 6 is connected to the outer peripheral surface of the bushing 4. The position of the exhaust hole 6 is not higher than the position of the lower end of the pressure head 1 when it descends to the lowest point, so as to ensure that the pressure head 1 can maintain normal exhaust during the descent process and will not cause a rebound.

[0023] A through hole is provided on the bushing 4 corresponding to the position of the pin hole 10. The through hole is connected to the pin hole 10. A set screw 8 is installed in the pin hole 10. The set screw 8 is used to pre-tighten the side of the positioning pin 9 placed in the pin hole 10, which can pre-fix the positioning pin 9 in the pin hole 10, prevent the positioning pin 9 from falling out of the pin hole 10, and facilitate press-fitting.

[0024] like Figure 3 As shown, before pressing begins, product 11 is fixed in place. The hole on product 11 where the positioning pin 9 needs to be pressed is coaxial with the pressing head 1 and the bushing 4. Then, the positioning pin 9 is inserted into the pin hole 10. The press drives the pressing head 1 downward. Under the action of gravity and spring 5, before the bushing 4 contacts product 11, the pressing head 1 and the bushing 4 are at their farthest points, and the spring 5 is in a free state. The bushing 4 moves downward synchronously with the pressing head 1. When the lower end face of the bushing 4 contacts product 11, the bushing 4 stops moving downward and becomes fixed. At this time, the pressing head 1 continues to move downward, the spring 5 is compressed, the ejector pin 7 contacts the positioning pin 9 and continues to apply downward pressure, correctly pressing the positioning pin 9 into the hole of product 11. During the pressing process, the positioning pin 9 is positioned by the pin hole 10, preventing pressure deviation. The pressing effect is good, safe, and efficient. The pressing effect is as follows. Figure 4 As shown.

[0025] After the pressing is completed, the press drives the pressing head 1 to start moving upward. The spring 5 temporarily presses the bushing 4 onto the product 11. The pressing head 1 continues to move upward. When the limit pin 3 contacts the end of the limit groove 2, the pressing head 1 drives the bushing 4 to move upward by the cooperation of the limit groove 2 and the limit pin 3 until the pressing head 1 returns to the starting point, and the pressing process ends.

[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A device for pressing and positioning locating pins on an arc-shaped end face, characterized in that, The device includes a bushing (4) and a pressure head (1). The bushing (4) has an installation hole and a pin hole (10) connected to each other. A part of the pressure head (1) is located in the installation hole. The bushing (4) and the pressure head (1) are slidably connected. A limit mechanism is provided between the bushing (4) and the pressure head (1). One end of the pressure head (1) located in the installation hole is connected to a pin (7). The bushing (4) has an exhaust hole (6) on its outer periphery. The inner end of the exhaust hole (6) is connected to the installation hole, and the outer end of the exhaust hole (6) is connected to the outer periphery of the bushing (4). A spring (5) is provided in the installation hole. One end of the spring (5) abuts against the lower end of the pressure head (1), and the other end of the spring (5) abuts against the bottom of the installation hole.

2. The arc-shaped end face press-fitting positioning pin device according to claim 1, characterized in that, The limiting mechanism includes a limiting groove (2) opened on the outer periphery of the pressure head (1), and a limiting pin (3) inserted in the bushing (4), with the inner end of the limiting pin (3) extending into the limiting groove (2).

3. The arc-shaped end face press-fitting positioning pin device according to claim 1, characterized in that, The lower end of the pressure head (1) is provided with a threaded hole, the upper end of the ejector pin (7) is provided with an external thread, and the ejector pin (7) and the spring (5) are threadedly connected.

4. The arc-shaped end face press-fitting positioning pin device according to claim 1, characterized in that, The bushing (4) has a through hole at the position corresponding to the pin hole (10), the through hole is connected to the pin hole (10), and a set screw (8) is installed in the pin hole (10).

5. The arc-shaped end face press-fitting positioning pin device according to claim 1, characterized in that, At least a portion of the ejector pin (7) is located inside the pin hole (10).

6. The arc-shaped end face press-fitting positioning pin device according to claim 5, characterized in that, The ejector pin (7) is fitted with the pin hole (10) with a clearance.

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