CN216531015U - Pin shaft cold-assembling tool - Google Patents
Pin shaft cold-assembling tool Download PDFInfo
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- CN216531015U CN216531015U CN202122966670.7U CN202122966670U CN216531015U CN 216531015 U CN216531015 U CN 216531015U CN 202122966670 U CN202122966670 U CN 202122966670U CN 216531015 U CN216531015 U CN 216531015U
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Abstract
The utility model provides a round pin axle cold charge instrument, includes the frock body, treat round pin axle and the fixed axle of assembly, and the frock body is the same with the round pin axle material of treating the assembly, sets up the fixed shaft hole that is used for assembling the round pin axle on the fixed axle, utilizes the frock body to link together less work piece and carries out the cold charge and handle, can guarantee the quality and the precision of cold charge, solves a series of needs interference fit, needs accurate positioning, needs the difficult problem of relation between fastener and the piece, not only is applicable to shallow hole interference fit, also is applicable to some deep hole interference fit.
Description
Technical Field
The utility model belongs to the technical field of special motors in control driving mechanisms, and particularly relates to a pin shaft cold-mounting tool.
Background
The current developed drive control mechanism product has a special motor, and the rotor of the motor is different from the conventional cast aluminum rotor or copper bar rotor and the like. The structure of the device is two half rotors, and the two half rotors can be opened and closed around a pin shaft which is cold-mounted on a fixed shaft under the conditions of power-on and power-off. The pin shaft is a pair of hinges for the two half rotors, and the installation of the pin shaft must be firm, accurate and reliable enough to ensure the normal operation of the rotors.
Disclosure of Invention
The utility model aims to provide a pin shaft cold assembly tool aiming at the defects of the prior art, and solves the problems that when small parts are assembled, the assembly precision is improved and the assembly difficulty is reduced under the condition that interference exists between a shaft and a hole.
In order to solve the technical problems, the utility model adopts the technical scheme that:
a pin shaft cold-assembling tool comprises a tool body, a pin shaft to be assembled and a fixed shaft, wherein the tool body and the pin shaft to be assembled are made of the same material, and the fixed shaft is provided with a fixed shaft hole for assembling the pin shaft; the head end part of the tool body is provided with an installation hole for assembling the pin shaft and a positioning threaded hole which is arranged along the radial direction along the axial direction, and the positioning threaded hole is correspondingly arranged on one side wall of the installation hole;
and the tail end part of the tool body is also provided with a cold mounting hole for traction.
The roughness of the inner end face of the mounting hole is Ra1.6, and the inner end face of the mounting hole is tightly connected with the end face of the pin shaft during assembly.
And a traction copper wire is arranged in the cold-assembling hole in a penetrating manner in a matching manner.
The diameter of the mounting hole is 10-12 mm.
And a jacking bolt is arranged in the positioning threaded hole.
The diameter of the pin shaft and the diameter of the fixed shaft hole meet the tolerance assembly requirement.
The utility model has the beneficial effects that:
the pin shaft cold-assembling tool comprises a tool body, a pin shaft to be assembled and a fixed shaft, wherein the tool body and the pin shaft to be assembled are made of the same material, the fixed shaft hole for assembling the pin shaft is formed in the fixed shaft, smaller workpieces are connected together by the tool body to be subjected to cold-assembling treatment, the quality and the precision of cold-assembling can be guaranteed, a series of problems that interference fit is needed, accurate positioning is needed, and the relation between a fastener and the workpieces is needed are solved, so that the tool is not only suitable for shallow hole interference assembly, but also suitable for deep hole interference assembly.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the stationary shaft.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The utility model provides a pin shaft cold fitting tool, which is shown in figures 1 and 2.
The pin shaft cold mounting tool comprises a tool body 1, a pin shaft 3 to be assembled and a fixed shaft 4, wherein the tool body 1 and the pin shaft 3 to be assembled are made of the same material, and the fixed shaft 4 is provided with a fixed shaft hole 41 for assembling the pin shaft 3; the tool comprises a tool body 1, wherein a head end part of the tool body 1 is axially provided with a mounting hole for assembling a pin shaft 3 and a positioning threaded hole which is radially provided, and the positioning threaded hole is correspondingly formed in one side wall of the mounting hole; the tail end portion of the tool body 1 is further provided with a cold-assembling hole 5 used for traction, and a traction copper wire is arranged in the cold-assembling hole 5 in a penetrating mode.
The roughness of the inner end face of the mounting hole is Ra1.6, during assembly, a puller bolt 2 is arranged in the positioning threaded hole and used for fixing a pin shaft 3, and the inner end face of the mounting hole is in close contact with the end face of the pin shaft 3.
The diameter of the mounting hole is 10-12 mm, and the diameter of the pin shaft and the diameter of the fixed shaft hole meet tolerance assembly requirements. Specifically, in this embodiment, the diameter of the pin shaft is 13.6+0.031 +0.023, and the diameter of the fixing shaft is 13.6+ 0.0180.
The specific assembly process is as follows:
(1) technical preparation before assembly
Preparing one liter of liquid nitrogen at-220 ℃, a 10kg copper hammer, a bottle of anhydrous alcohol, a copper sheet with the thickness of 0.06mm and the breadth of 60X200 and a tool for cold charging;
and rechecking whether the sizes of the pin shaft 13.6+0.031 +0.023 and the fixed shaft hole 13.6+ 0.0180 are in respective tolerance zones, and checking whether burrs or high points exist around the matching surface.
(2) Fastening of fastening axles
Wrapping the outer circular surfaces at two sides of the fixed shaft hole with copper sheets, and fastening the outer circular surfaces at two sides of the fixed shaft hole by using a flat tongs, so that the fixed shaft hole with the diameter of 13.6+ 0.0180 is vertically upward; and cleaning the cold assembly joint surface of the fixed shaft by absolute ethyl alcohol, and then waiting for assembly.
(3) Freezing of pin
The upper part of the pin shaft is inserted into the tool body 1, the upper end face of the pin shaft is tightly attached to the lower bottom face of the tool body 1, the pin shaft is tightly pressed by a pressing bolt 2, a traction copper wire with the diameter of 1.5mm penetrates through a cold loading hole 5 of the tool body 1, the tool body 1 and the pin shaft are immersed into a liquid nitrogen cylinder, and a cover is covered (the traction copper wire is exposed outside the liquid nitrogen cylinder) for freezing.
It needs to be noted that when the pin shaft is cold-packed, personal protection is firstly made, protective clothing is worn, and cotton gloves are worn, so that the pin shaft is prevented from being frozen by liquid nitrogen; and then, pulling the frozen pin shaft out of the liquid nitrogen barrel through a traction copper wire, holding the tool body by a hand wearing a cotton glove, aligning the pin shaft with a pin hole of the fixed shaft, rapidly inserting the pin shaft into the fixed shaft, waiting for 10 minutes, loosening the traction copper wire, removing the tool body 1, and finishing cold charging. If half of the pin is not installed, a 10kg copper hammer is used for knocking the upper end face of the cold installation tool to drive the pin shaft into the fixed shaft hole.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, and the utility model is intended to be covered by the appended claims. The scope of the utility model is defined by the appended claims and equivalents.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the scope of the present invention.
Claims (6)
1. The utility model provides a round pin axle cold charge instrument which characterized in that: the tool comprises a tool body, a pin shaft to be assembled and a fixed shaft, wherein the tool body and the pin shaft to be assembled are made of the same material, and the fixed shaft is provided with a fixed shaft hole for assembling the pin shaft; the head end part of the tool body is provided with an installation hole for assembling the pin shaft and a positioning threaded hole which is arranged along the radial direction along the axial direction, and the positioning threaded hole is correspondingly arranged on one side wall of the installation hole;
and the tail end part of the tool body is also provided with a cold mounting hole for traction.
2. The pin roll cold-fitting tool according to claim 1, characterized in that: the roughness of the inner end face of the mounting hole is Ra1.6, and the inner end face of the mounting hole is tightly connected with the end face of the pin shaft during assembly.
3. The pin roll cold-fitting tool according to claim 1, characterized in that: and a traction copper wire is arranged in the cold-assembling hole in a penetrating manner in a matching manner.
4. A pin roll cold-fitting tool according to any one of claims 1 to 3, characterised in that: the diameter of the mounting hole is 10-12 mm.
5. The pin roll cold-fitting tool according to claim 4, characterized in that: and a jacking bolt is arranged in the positioning threaded hole.
6. The pin roll cold-fitting tool according to claim 5, characterized in that: the diameter of the pin shaft and the diameter of the fixed shaft hole meet the tolerance assembly requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122966670.7U CN216531015U (en) | 2021-11-30 | 2021-11-30 | Pin shaft cold-assembling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122966670.7U CN216531015U (en) | 2021-11-30 | 2021-11-30 | Pin shaft cold-assembling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216531015U true CN216531015U (en) | 2022-05-13 |
Family
ID=81463397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122966670.7U Active CN216531015U (en) | 2021-11-30 | 2021-11-30 | Pin shaft cold-assembling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216531015U (en) |
-
2021
- 2021-11-30 CN CN202122966670.7U patent/CN216531015U/en active Active
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