Positioning pin press fitting tool

Abstract

The utility model discloses a press fitting tool for a positioning pin. The press fitting tool comprises a guide sleeve, a rapping bar and a sealing cover, the rapping bar is sleeved with the guide sleeve, the rapping bar is provided with a rapping end and a pushing end, the sealing cover is provided with a functional cavity, and the sealing cover is connected to the end, close to the pushing end, of the guide sleeve to limit the pushing end in the functional cavity; the sealing cover is provided with a pin mounting hole, the pushing end is provided with a pin lifting column, the pin lifting column is located in the center of the cross section of the rapping bar, the central axis of the pin mounting hole coincides with the central axis of the pin lifting column, and the rapping bar is arranged in the guide sleeve in a sliding mode so that the pin lifting column can be driven to be close to or away from the pin mounting hole; the tool further comprises a positioning pin limiting assembly, and the positioning pin limiting assembly is arranged in the functional cavity and has pre-tightening force for limiting the positioning pin. The assembling efficiency of the small positioning pin at the preset position can be improved, and the assembling safety of the small positioning pin is improved.

Description

Technical Field

[0001] The utility model relates to the field of positioning pin assembly, in particular to a positioning pin press-fitting tool. Background Art

[0002] When assembling the engine with a smaller locating pin, the locating pin is relatively short and inconvenient to hold. When the locating pin φ6*12 is assembled by hand, the assembly is difficult and the assembly efficiency is low, and there is a risk of injury to the hand when knocking.

[0003] Therefore, in order to solve the above problems, a positioning pin press-fitting tool is needed, which can improve the assembly efficiency of small positioning pins at preset positions and improve the assembly safety of small positioning pins. Utility Model Content

[0004] In view of this, the purpose of the utility model is to overcome the defects in the prior art and provide a positioning pin press-fitting tool, which can improve the assembly efficiency of small positioning pins at preset positions and improve the assembly safety of small positioning pins.

[0005] The positioning pin press-fitting tool of the utility model comprises a guide sleeve, a knocking rod and a cover; the guide sleeve sleeves the knocking rod, the knocking rod has a knocking end and a pushing end, the cover has a functional cavity, and the cover is connected to one end of the guide sleeve close to the pushing end to limit the pushing end in the functional cavity;

[0006] The sealing cover has a pin hole, the push end has a pin column, the pin column is located at the center of the cross section of the knock rod, the central axis of the pin hole coincides with the central axis of the pin column, and the knock rod is slidably arranged in the guide sleeve so that the pin column is driven to approach or move away from the pin hole;

[0007] It also includes a positioning pin limiting component, which is arranged in the functional cavity and has a pre-tightening force for limiting the positioning pin.

[0008] Furthermore, the ratio of the radial dimension of the ejector pin to the radial dimension of the pin installation hole is between 0.8 and 1.

[0009] Furthermore, the positioning pin limiting assembly includes a magnetic ring, which is limited in the functional cavity, and the ratio of the inner ring size of the magnetic ring to the radial size of the pin hole is between 1.1 and 1.3; the magnetic ring limits the positioning pin by magnetic force.

[0010] Furthermore, the striking end extends outward to form a pedestal with a radial dimension larger than an inner diameter dimension of the guide sleeve, and the guide sleeve has a support platform adapted to the pedestal.

[0011] Furthermore, the sealing cover is made of nylon.

[0012] Furthermore, the outer surface of the guide sleeve has a marking area.

[0013] Furthermore, the pushing end can be driven to slide and be limited in the functional cavity through a locking member.

[0014] Furthermore, the locking member is a retaining ring sleeved on the pushing end.

[0015] The beneficial effects of the utility model are as follows: the utility model discloses a positioning pin pressing tool, which limits the positioning pin to be assembled on the cover by a magnetic ring, and then overcomes the adsorption force of the magnetic force on the positioning pin by knocking or pushing the knocking rod, so that the positioning pin can be easily driven into the specified position, thereby improving the operational safety. It is suitable for the assembly of parts for small batch test vehicles, can improve the assembly efficiency of small positioning pins at preset positions, and has a very high yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model through the central axis (without the positioning pin being pushed);

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model through the central axis (position of the push-up positioning pin). DETAILED DESCRIPTION

[0021] Figure 1 It is a structural schematic diagram of the utility model; Figure 2 It is a schematic diagram of the explosion structure of the utility model; Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model through the central axis (without the positioning pin being pushed); Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model through the central axis (position of the push positioning pin); as shown in the figure, the vertical direction of this scheme is the length direction of the guide sleeve 1, the top in the vertical direction is the rear, and the bottom in the vertical direction is the rear, which will not be repeated here.

[0022] The positioning pin press-fitting tool in this embodiment includes a guide sleeve 1, a knock rod 2 and a cover 3;

[0023] The guide sleeve 1 has a columnar through hole along the vertical direction, and the knocking rod 2 is in the shape of a rod. The guide sleeve 1 sleeves the knocking rod 2, and the knocking rod 2 is driven to slide in the guide sleeve 1, and the knocking rod 2 and the guide sleeve 1 are approximately fitted, so that the guide sleeve 1 can play a good guiding function for the knocking rod 2.

[0024] In this embodiment, the knock rod 2 has a knocking end and a pushing end;

[0025] The knocking end is located at the rear end of the guide sleeve 1, and the knocking end extends outward to form a pedestal 21 whose radial dimension is larger than the inner diameter of the guide sleeve 1. The guide sleeve 1 has a support 11 adapted to the pedestal 21; so that the pedestal 21 and the support 11 can be limited by the pedestal 21 when they are close to each other, limiting the forward movement stroke of the pushing end, thereby meeting the assembly requirements of the locating pin at the preset position.

[0026] The pushing end is located at the rear end of the guide sleeve 1, and the pushing end can be driven to slide and be limited in the functional cavity through the locking member 4; the locking member 4 is a retaining ring sleeved on the pushing end; the retaining ring limits the backward movement stroke of the pushing end, so that the sliding stroke of the knocking rod 2 on the guide sleeve 1 is limited, and the knocking rod 2 will not be separated from the guide sleeve 1, and the knocking rod 2 will not be pushed out too long, causing the positioning pin to be embedded in the specified position or even damage the structure of the part to be assembled.

[0027] In this embodiment, the cover 3 has a functional cavity, and the cover 3 is connected to the end of the guide sleeve 1 close to the pushing end to limit the pushing end in the functional cavity; more specifically, the cover 3 is made of nylon, and has the advantages of high mechanical strength, good toughness and outstanding fatigue resistance; the front end of the guide sleeve 1 has an external thread, and the cover 3 is assembled on the front end of the guide sleeve 1 through an internal thread, and the cover 3 has a seat engaged with the front end surface of the guide sleeve 1, so as to ensure the assembly reliability of the cover 3 on the guide sleeve 1.

[0028] In this embodiment, the cover 3 has a pin hole 31, and the push end has a push pin column 22. The push pin column 22 is located at the center of the cross section of the knock rod 2, that is, the central axis of the push pin column 22 coincides with the central axis of the knock rod 2, ensuring that the knock rod 2 is knocked and pushed so that the positioning pin is driven into the preset position; the central axis of the pin hole 31 coincides with the central axis of the push pin column 22, and the knock rod 2 is slidably arranged in the guide sleeve 1, so that the push pin column 22 is driven to approach or move away from the pin hole 31;

[0029] The ratio of the radial dimension of the push pin column 22 to the radial dimension of the pin installation hole 31 is between 0.8 and 1. In this scheme, the ratio of the radial dimension of the push pin column 22 to the radial dimension of the pin installation hole 31 is 0.9, which makes the pushing of the locating pin more reliable and minimizes the damage to the pin; the pushing integrity of the locating pin is better and the operation is more convenient, and the assembly of the locating pin can be completed by only striking the knocking rod 2.

[0030] In this embodiment, it also includes a positioning pin limiting component, which is arranged in the functional cavity. The positioning pin limiting component has a preload force to limit the positioning pin. The positioning pin limiting component can be an elastic rubber sleeve or a magnetic ring 5 or a structure with a mechanical adaptive clamping mechanism, so as to realize the function of limiting the positioning pin to be assembled in this scheme. When in use, the top pin column 22 of the knock rod 2 overcomes the preload force to assemble the positioning pin at a preset position; in this scheme, the positioning pin limiting component includes a magnetic ring 5, which is limited in the functional cavity, and the magnetic ring 5 is closer to the pin hole 31, so as to enhance the limiting function of the positioning pin; the ratio of the inner ring size of the magnetic ring 5 to the radial size of the pin hole 31 is between 1.1 and 1.3; the magnetic ring 5 limits the positioning pin by magnetic force; the ratio of the inner ring size of the magnetic ring 5 to the radial size of the pin hole 31 in this scheme is 1.1; so that the positioning and pushing of the positioning pin are more reliable.

[0031] This solution is particularly suitable for the assembly of short pile pins with a diameter of less than 8 mm and a length of no more than 16 mm; and is more suitable for positioning pins that are assembled in a small space and at the bottom of the part to be installed.

[0032] In this embodiment, the outer surface of the guide sleeve 1 has a marking area; the marking area is used to mark the diameter of the pin hole to facilitate standardized use in the industry.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A positioning pin press-fitting tool, characterized in that: It comprises a guide sleeve, a knocking rod and a cover; the guide sleeve covers the knocking rod, the knocking rod has a knocking end and a pushing end, the cover has a functional cavity, and the cover is connected to one end of the guide sleeve close to the pushing end to limit the pushing end in the functional cavity; The sealing cover has a pin hole, the push end has a pin column, the pin column is located at the center of the cross section of the knock rod, the central axis of the pin hole coincides with the central axis of the pin column, and the knock rod is slidably arranged in the guide sleeve so that the pin column is driven to approach or move away from the pin hole; It also includes a positioning pin limiting component, which is arranged in the functional cavity and has a pre-tightening force for limiting the positioning pin.

2. The positioning pin press-fitting tool according to claim 1, characterized in that: The ratio of the radial dimension of the ejector pin to the radial dimension of the pin installation hole is between 0.8 and 1.

3. The positioning pin press-fitting tool according to claim 1, characterized in that: The positioning pin limiting assembly includes a magnetic ring, which is limited in the functional cavity, and the ratio of the inner ring size of the magnetic ring to the radial size of the pin hole is between 1.1 and 1.3; the magnetic ring limits the positioning pin by magnetic force.

4. The positioning pin press-fitting tool according to claim 1, characterized in that: The knocking end extends outward to form a pedestal with a radial dimension larger than the inner diameter of the guide sleeve, and the guide sleeve has a support platform matched with the pedestal.

5. The positioning pin press-fitting tool according to claim 1, characterized in that: The sealing cover is made of nylon.

6. The positioning pin press-fitting tool according to claim 1, characterized in that: The outer surface of the guide sleeve has a marking area.

7. The positioning pin press-fitting tool according to claim 1, characterized in that: The pushing end can be driven to slide and be limited in the functional cavity through the locking member.

8. The positioning pin press-fitting tool according to claim 7, characterized in that: The locking member is a retaining ring sleeved on the pushing end.

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