New energy motor rear shell bearing hole bridging removing stamping knife

Abstract

The utility model discloses a new energy motor rear shell bearing hole bridging removing stamping knife which comprises a stamping knife rod and an installation assembly fixedly arranged at the top end of the stamping knife rod, a circular-truncated-cone-shaped blocking piece is fixedly arranged at the bottom end of the stamping knife rod, a guide column is fixedly arranged at the bottom end of the circular-truncated-cone-shaped blocking piece, a pressure applying head is fixedly arranged at the bottom end of the guide column, and the pressure applying head is fixedly arranged at the bottom end of the guide column. The surface of the guide column is fixedly provided with an external thread sleeve, the external thread sleeve is provided with a stamping knife head assembly used for removing the bridging of the bearing hole, and the installation assembly comprises a clamping head and a reserved pin hole formed in the middle of the clamping head. A traditional profiling stamping knife is changed into the step type stamping knife, the stress mode is changed from original bridging integral edge stress breaking of a bridging to bridging middle stress, the middle of the bridging is firstly stressed to be bent and snapped, then the stamping knife moves downwards and scrapes a bearing hole so that residual parts can be cleaned conveniently, and the problem that cracks and residues are prone to being generated by the traditional stamping knife is thoroughly solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tool technology for machining bearing holes of rear housings of new energy motors, in particular to a punching tool for removing bridges from bearing holes of rear housings of new energy motors. Background Art

[0002] In the die-casting of aluminum alloy housings for motors used in new energy vehicles, the strength and die-casting quality of the bearing hole is a key difficulty. In order to ensure the die-casting quality of the bearing hole, a bridge must be added in the middle of the bearing hole to ensure that the bearing hole is filled with aluminum liquid, thereby ensuring the strength and quality of the bearing hole. The bridge needs to be removed after molding. In the castings of such products, the removal quality of the thick bridge at the bearing hole has always troubled the die-casting industry. For relatively thick bridges, a profiling punch is mainly used to remove them through a trimming die. The profiling punch is mainly composed of a tool rod and an annular cutter head. The annular cutter head matches the diameter of the bearing hole. The removal of the bridge in the middle of the bearing hole is achieved through punching and cutting. The above common types of bearing hole bridge removal punches have the following shortcomings in actual applications:

[0003] Since the size of the contoured punch is designed according to the size of the bearing hole, during the process of cutting the partition, pressure is applied to the bridge through the punch as a whole, with the aim of breaking the bridge from the root and thus cutting off the bridge. However, due to the thick thickness of the bridge, during the trimming process, after the bridge is removed, residues are likely to remain, and cracks may occur at the root of the fracture, and the crack depth is uncontrolled, which may easily cause product scrapping and increase labor costs and scrap rates. Utility Model Content

[0004] The purpose of the utility model is to provide a punch for removing the bridge of the bearing hole of the rear housing of a new energy motor, so as to solve the problem that the existing punch for removing the bridge of the bearing hole of the motor housing proposed in the above background technology easily causes the casting to be scrapped.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a punch for removing the bridge of the bearing hole in the rear housing of a new energy motor, comprising a punch rod and a mounting assembly fixedly arranged on the top of the punch rod, a truncated cone-shaped blocker is fixedly arranged at the bottom end of the punch rod, a guide column is fixedly arranged at the bottom end of the truncated cone-shaped blocker, a pressure head is fixedly arranged at the bottom end of the guide column, an externally threaded sleeve is fixedly arranged on the surface of the guide column, and a punch head assembly for removing the bridge of the bearing hole is installed on the externally threaded sleeve.

[0006] Preferably, the installation assembly includes a clamping head and a reserved pin hole opened in the middle of the clamping head, which is convenient for installation and use.

[0007] Preferably, the punching tool head assembly includes a threaded barrel and an annular punching tool seat fixedly arranged at the bottom end of the threaded barrel, a punching tool blade is fixedly arranged on the periphery of the bottom end of the annular punching tool seat, and the threaded barrel is threadedly connected to the external threaded sleeve, so as to facilitate the flexible replacement of the punching tool head assembly and convenient use.

[0008] Preferably, a punch hole is provided inside the annular punch seat, and the punch hole matches the pressure head; the stepped punch can fully remove the bridge.

[0009] Preferably, the diameter of the truncated cone-shaped stopper is larger than the diameter of the threaded barrel; the truncated cone-shaped stopper can limit the punching cutter head assembly to prevent the punching cutter head assembly from moving upward excessively, and the punching is smooth.

[0010] Preferably, the diameter of the guide column is larger than the diameter of the punch hole; during the punching process, the guide column will apply pressure inside the annular punch seat, thereby completing the punching of the bridge.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The bearing hole bridge removal punch changes the traditional profiling punch into a stepped punch. The force-bearing mode is changed from the original bridge integral edge force to break the bridge to the middle of the bridge. First, the middle of the bridge is bent and the bridge is broken. Then the punch moves down and scrapes the bearing hole to clean the remaining part, which completely solves the problem of cracks and residues easily generated by traditional punches.

[0013] The cutter head assembly can be flexibly disassembled and can be replaced in a targeted manner after the punch blade is damaged. The punch rod can be used repeatedly and is suitable for bridging bearing holes of different sizes. It has a simple structure and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the punching knife of the utility model;

[0015] Figure 2 This is a schematic diagram of the disassembled structure of the punching knife of the utility model;

[0016] Figure 3 It is a front cross-sectional view of the punching knife of the utility model;

[0017] Figure 4 It is a cross-sectional view of the contour punching knife of the prior art of the utility model.

[0018] In the figure: 1. punch rod; 2. truncated cone-shaped stopper; 3. threaded barrel; 4. annular punch seat; 5. punch blade; 6. pressure head; 7. clamping head; 8. reserved pin hole; 9. external threaded sleeve; 10. guide column; 11. punch hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] See also Figure 1-4 The utility model provides a punching tool for removing the bridge of the bearing hole of the rear housing of a new energy motor, including a punching tool rod 1 and a mounting assembly fixedly arranged on the top of the punching tool rod 1, a truncated cone-shaped stopper 2 is fixedly arranged at the bottom end of the punching tool rod 1, a guide column 10 is fixedly arranged at the bottom end of the truncated cone-shaped stopper 2, a pressure head 6 is fixedly arranged at the bottom end of the guide column 10, an external threaded sleeve 9 is fixedly arranged on the surface of the guide column 10, and a punching tool head assembly for removing the bridge of the bearing hole is installed on the external threaded sleeve 9.

[0021] See also Figure 1 , Figure 2 and Figure 3 , further, the installation assembly includes a clamping head 7 and a reserved pin hole 8 opened in the middle of the clamping head 7, the punching tool head assembly includes a threaded barrel 3 and an annular punching tool seat 4 fixedly arranged at the bottom end of the threaded barrel 3, a punching tool blade 5 is fixedly arranged on the periphery of the bottom end of the annular punching tool seat 4, the threaded barrel 3 is threadedly connected to the external threaded sleeve 9, a punch hole 11 is opened inside the annular punching tool seat 4, the punch hole 11 matches the pressure head 6, the diameter of the truncated cone block 2 is larger than the diameter of the threaded barrel 3, and the diameter of the guide column 10 is larger than the diameter of the punch hole 11;

[0022] When in use, hold the punch rod 1 so that the clamping head 7 is inserted into the driving shaft of the punching equipment, and then use a pin to pass through the reserved pin hole 8 to lock and fix it. When bridging the bearing hole of the rear housing of the energy removal motor, make the annular punch seat 4 face the bearing hole. During the slow pressure application process, the pressure head 6 will apply pressure from the middle of the bridge, and the middle part of the bridge will bend downward due to the force, thereby tearing off the bridge. At this time, there will be residual bridges on the edge of the bearing hole. As the punch continues to apply pressure, the punch blade 5 will move in line with the side wall of the bearing hole, thereby scraping off the residual bridge. A step-type punch is used, and the original integral edge of the bridge is forced to break the bridge, and the middle of the bridge is forced, first bending the bridge and then pulling it off. The punch moves down and scrapes off the remaining part, completely solving the problem of cracks and residues.

[0023] When the embodiment of the present application is in use: when the punching knife head assembly has been used multiple times and the punching knife blade 5 is worn, the staff can remove the annular punching knife seat 4 by screwing it, and screw the new punching knife head assembly onto the external threaded sleeve 9. The knife head can be quickly replaced, has a wide range of applications, and is safe and practical.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A punching tool for removing the bridge of the bearing hole of the rear housing of a new energy motor, comprising a punching tool rod (1) and a mounting assembly fixedly arranged on the top of the punching tool rod (1), characterized in that: A truncated cone-shaped stopper (2) is fixedly provided at the bottom end of the punching rod (1), a guide column (10) is fixedly provided at the bottom end of the truncated cone-shaped stopper (2), a pressure head (6) is fixedly provided at the bottom end of the guide column (10), an external threaded sleeve (9) is fixedly provided on the surface of the guide column (10), and a punching tool head assembly for removing the bearing hole bridge is installed on the external threaded sleeve (9).

2. According to claim 1, a punch for removing bridges from bearing holes in the rear housing of a new energy motor, characterized in that: The installation assembly comprises a clamping head (7) and a reserved pin hole (8) opened in the middle of the clamping head (7).

3. According to claim 1, a punch for removing bridges from bearing holes in the rear housing of a new energy motor, characterized in that: The punching cutter head assembly comprises a threaded barrel (3) and an annular punching cutter seat (4) fixedly arranged at the bottom end of the threaded barrel (3); a punching cutter blade (5) is fixedly arranged on the periphery of the bottom end of the annular punching cutter seat (4); and the threaded barrel (3) is threadedly connected to an external threaded sleeve (9).

4. According to claim 3, a punch for removing bridges from bearing holes in the rear housing of a new energy motor, characterized in that: A punch hole (11) is provided inside the annular punch seat (4), and the punch hole (11) matches the pressure head (6).

5. According to claim 3, a punch for removing bridges from bearing holes in the rear housing of a new energy motor, characterized in that: The diameter of the truncated cone-shaped stopper (2) is greater than the diameter of the threaded cylinder (3).

6. The punching tool for removing the bridge of the bearing hole of the rear housing of a new energy motor according to claim 1 is characterized in that: The diameter of the guide column (10) is greater than the diameter of the punch hole (11).

Images