Positioning tool for disassembling water pump impeller nut

Abstract

The utility model relates to the technical field of water pump dismounting, and discloses a positioning tool used for dismounting a water pump impeller nut, a water pump is provided with a rotating shaft, the rotating shaft is provided with a transmission gear, the positioning tool comprises a shell and a positioning assembly, one end of the shell is provided with an assembling hole for the transmission gear to stretch in, and the positioning assembly comprises a guide sleeve, a screw rod and a positioning pin. The guide sleeve is fixed to the side of the shell and provided with a guide hole which is formed in the radial direction of the assembly hole and communicated with the assembly hole, the screw is rotationally connected with the guide hole, the end, close to the assembly hole, of the screw is in threaded connection with the positioning pin, and the positioning pin is slidably connected with the guide hole and can extend into the assembly hole in a sliding mode. A positioning part matched with a tooth groove of the transmission gear is arranged at the end, away from the screw, of the positioning pin. The device is easy and convenient to operate, high in reliability and capable of preventing the transmission gear on the rotating shaft of the water pump from being damaged by clamping.

Description

Technical Field

[0001] The utility model relates to the technical field of water pump disassembly, in particular to a positioning tool for disassembling the impeller nut of a water pump. Background Art

[0002] A certain type of water pump includes a pump body, a rotating shaft, a transmission gear, an impeller, and an impeller nut. One end of the rotating shaft extends into the pump body, and the other end of the rotating shaft extends out of the pump shell and is provided with a transmission gear. The impeller is arranged in the pump body and installed on the rotating shaft. The impeller nut is arranged in the pump body and installed at the end of the rotating shaft. The rotation of the transmission gear drives the rotation of the rotating shaft and the impeller, and the setting of the impeller nut can prevent the impeller from loosening. When disassembling the impeller nut of this type of water pump, the general method is to first clamp and fix the water pump transmission gear on the workbench vise, and then manually use tools to disassemble the impeller nut. This method is likely to damage the transmission gear due to clamping and has poor reliability. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a positioning tool for disassembling the impeller nut of a water pump, which is easy to operate and can prevent the transmission gear on the rotating shaft of the water pump from being damaged.

[0004] To solve the above technical problems, the utility model provides a positioning tool for disassembling the impeller nut of a water pump. The water pump is provided with a rotating shaft, and a transmission gear is arranged on the rotating shaft. The tool includes a housing and a positioning component. One end of the housing is provided with an assembly hole for the transmission gear to extend into. The positioning component includes a guide sleeve, a screw rod, and a positioning pin. The guide sleeve is fixed on the side of the housing. The guide sleeve is provided with a guide hole arranged along the radial direction of the assembly hole and communicated with the assembly hole. The screw rod is rotatably connected with the guide hole. One end of the screw rod close to the assembly hole is threadedly connected with the positioning pin. The positioning pin is slidably connected with the guide hole. The positioning pin can slide into the assembly hole. One end of the positioning pin away from the screw rod is provided with a positioning portion matching the tooth groove of the transmission gear.

[0005] As a preferred scheme of the utility model, a limiting groove is arranged on the side of the positioning pin along the axial direction of the guide hole. A limiting hole communicated with the guide hole is arranged on the side of the guide sleeve. The position of the limiting hole corresponds to the position of the limiting groove. A limiting column is inserted into the limiting hole. The end of the limiting column is slidably matched with the limiting groove.

[0006] As a preferred scheme of the utility model, a positioning sleeve is inserted into one end of the guide sleeve away from the housing. The positioning sleeve is provided with a positioning hole coaxially arranged with the guide hole. The screw rod is provided with a connecting portion rotatably matched with the positioning hole.

[0007] As a preferred embodiment of the present utility model, one end of the screw rod away from the assembly hole extends out of the positioning hole and is provided with a handwheel.

[0008] As a preferred embodiment of the present utility model, one end of the handwheel close to the positioning sleeve abuts against the end of the positioning sleeve.

[0009] As a preferred embodiment of the present utility model, a limiting flange located in the guiding hole is provided on the screw rod, and one end of the limiting flange away from the assembly hole abuts against the end of the positioning sleeve.

[0010] As a preferred embodiment of the present utility model, the positioning sleeve is threadedly connected to the guiding hole, a positioning flange is provided on the positioning sleeve, and one end of the positioning flange close to the guiding sleeve abuts against the end of the guiding sleeve.

[0011] As a preferred embodiment of the present utility model, multiple groups of the positioning components are provided and arranged along the outer circumference of the housing.

[0012] In an embodiment of the present utility model, a positioning tool for disassembling a water pump impeller nut, compared with the prior art, has the beneficial effects that: since the screw rod is rotationally connected to the guiding hole, the positioning pin is threadedly connected to the screw rod, and the positioning pin is slidably connected to the guiding hole, when the screw rod is rotated, the positioning pin will slide axially along the screw rod, so that the positioning pin approaches or moves away from the assembly hole; during use, first clamp and fix the housing on a bench vice, then insert the transmission gear of the water pump into the assembly hole, and adjust the position of the transmission gear so that the position of the positioning pin corresponds to the position of the tooth groove of the transmission gear, then rotate the screw rod so that the positioning portion of the positioning pin is embedded in the tooth groove of the transmission gear, at this time the positioning portion restricts the rotation of the transmission gear and the rotating shaft, with high reliability, and finally use a tool to disassemble the impeller nut, the operation is simple, and there is no need to directly clamp and fix the transmission gear, preventing the transmission gear from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model during use;

[0014] Figure 2 is Figure 1 the A-A cross-sectional view of

[0015] Figure 3 is a schematic structural diagram of the connection between the screw rod and the guiding sleeve of the present utility model;

[0016] Figure 4 is a schematic structural diagram of the housing and the guiding sleeve of the present utility model;

[0017] Figure 5 is a schematic structural diagram of the screw rod;

[0018] Figure 6It is a schematic structural view of the positioning pin of the present utility model;

[0019] Figure 7 It is a schematic structural view of the positioning sleeve of the present utility model;

[0020] In the figure, 1 is a water pump; 11 is a rotating shaft; 12 is a transmission gear; 13 is an impeller nut; 2 is a housing; 21 is an assembly hole; 3 is a positioning assembly; 31 is a guide sleeve; 311 is a guide hole; 312 is a limiting hole; 313 is a limiting post; 32 is a screw; 321 is a rotating part; 322 is a limiting flange; 33 is a positioning pin; 331 is a positioning part; 332 is a limiting groove; 34 is a positioning sleeve; 341 is a positioning hole; 342 is a positioning flange; 35 is a handwheel. Specific embodiments

[0021] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0022] In the description of the present utility model, it should be understood that the present utility model uses the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] Such as Figure 1-7As shown in the figure, a positioning tool for disassembling the impeller nut 13 of a water pump 1 according to a preferred embodiment of the present utility model. The water pump 1 is provided with a rotating shaft 11, and a transmission gear 12 is arranged on the rotating shaft 11. This tooling includes a housing 2 and a positioning component 3. One end of the housing 2 is provided with an assembly hole 21 into which the transmission gear 12 can extend. The positioning component 3 includes a guide sleeve 31, a screw 32, and a positioning pin 33. The guide sleeve 31 is fixed on the side of the housing 2. The guide sleeve 31 is provided with a guide hole 311 arranged radially along the assembly hole 21 and communicating with the assembly hole 21. The screw 32 is rotatably connected to the guide hole 311, that is, the screw 32 is inserted into the guide hole 311 and rotatably matched with the guide hole 311. One end of the screw 32 close to the assembly hole 21 is threadedly connected to the positioning pin 33. The positioning pin 33 is arranged in the guide hole 311 and is slidably connected to the guide hole 311. The positioning pin 33 can slide into the assembly hole 21. One end of the positioning pin 33 away from the screw 32 is provided with a positioning portion 331 matching the tooth groove of the transmission gear 12. Since the screw 32 is rotatably connected to the guide hole 311 (it will not move axially along the guide hole 311), the positioning pin 33 is threadedly connected to the screw 32, and the positioning pin 33 is slidably connected to the guide hole 311. Therefore, when the screw 32 is rotated, the positioning pin 33 will slide along the axial direction of the screw 32 (that is, the axial direction of the guide hole 311), so that the positioning pin 33 approaches or moves away from the assembly hole 21.

[0024] The working principle of this embodiment is as follows: When in use, first clamp and fix the housing 2 on the bench vice, then lift the water pump 1, and then extend the transmission gear 12 of the water pump 1 into the assembly hole 21 along the axial direction of the assembly hole 21, and adjust the position of the transmission gear 12 so that the position of the positioning pin 33 corresponds to the position of the tooth groove of the transmission gear 12. Subsequently, rotate the screw 32 to make the positioning pin 33 move along the axial direction of the guide hole 311 towards the direction close to the assembly hole 21 until the positioning portion 331 of the positioning pin 33 is embedded in the tooth groove of the transmission gear 12. At this time, the positioning portion 331 cooperates with the tooth groove of the transmission gear 12, thereby restricting the rotation of the transmission gear 12 and the rotating shaft 11. Finally, use a tool to disassemble the impeller nut 13; this tooling can make the positioning pin 33 slide by rotating the screw 32, so that the positioning portion 331 is embedded in the tooth groove of the transmission gear 12, realizing the restriction of the rotation of the transmission gear 12 and the rotating shaft 11, so as to disassemble the impeller nut 13. It has high reliability and does not need to directly clamp and fix the transmission gear 12, preventing the transmission gear 12 from being damaged by clamping.

[0025] Exemplarily, a limiting groove 332 is provided on the side of the positioning pin 33 along the axial direction of the guiding hole 311. A limiting hole 312 communicating with the guiding hole 311 is provided on the side of the guiding sleeve 31. The position of the limiting hole 312 corresponds to the position of the limiting groove 332. A limiting post 313 is inserted into the limiting hole 312, and the end of the limiting post 313 is in sliding fit with the limiting groove 332 to ensure that the positioning pin 33 slides along the axial direction of the guiding hole 311 and prevent it from deflecting.

[0026] Exemplarily, a positioning sleeve 34 is inserted into one end of the guiding sleeve 31 away from the housing 2. The positioning sleeve 34 is fixedly connected to the guiding sleeve 31. The positioning sleeve 34 is provided with a positioning hole 341 coaxially arranged with the guiding hole 311. The screw rod 32 is provided with a connecting portion rotatably matched with the positioning hole 341, that is, the screw rod 32 can rotate relative to the guiding sleeve 31.

[0027] Exemplarily, one end of the screw rod 32 away from the assembly hole 21 extends out of the positioning hole 341 and is provided with a hand wheel 35. The hand wheel 35 is fixedly connected to the screw rod 32. Rotating the hand wheel 35 can realize the rotation of the screw rod 32, which is convenient for operation.

[0028] Exemplarily, one end of the hand wheel 35 close to the positioning sleeve 34 abuts against the end of the positioning sleeve 34, so as to prevent the screw rod 32 from moving towards the housing 2.

[0029] Exemplarily, a limiting flange 322 is provided on the screw rod 32 inside the guiding hole 311. One end of the limiting flange 322 away from the assembly hole 21 abuts against the end of the positioning sleeve 34 (the end close to the assembly hole 21), so as to prevent the screw rod 32 from moving away from the housing 2.

[0030] Exemplarily, the positioning sleeve 34 is threadedly connected to the guiding hole 311, which is simple for disassembly and assembly. The positioning sleeve 34 is provided with a positioning flange 342. One end of the positioning flange 342 close to the guiding sleeve 31 abuts against the end of the guiding sleeve 31, so as to judge that the positioning sleeve 34 is installed in place.

[0031] Exemplarily, multiple groups of positioning assemblies 3 are arranged along the outer periphery of the housing 2. During use, the positioning parts 331 of multiple positioning pins 33 can be respectively embedded into the tooth grooves of the transmission gear 12 to improve the reliability of the tooling during use.

[0032] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can still be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A positioning tool for disassembling a water pump impeller nut, wherein the water pump is provided with a rotating shaft, and a transmission gear is provided on the rotating shaft, characterized in that: It includes a shell and a positioning assembly, one end of the shell is provided with an assembly hole for the transmission gear to extend into, the positioning assembly includes a guide sleeve, a screw rod and a positioning pin, the guide sleeve is fixed to the side of the shell, the guide sleeve is provided with a guide hole arranged along the radial direction of the assembly hole and connected to the assembly hole, the screw rod is rotatably connected to the guide hole, one end of the screw rod close to the assembly hole is threadedly connected to the positioning pin, the positioning pin is slidably connected to the guide hole, the positioning pin can slide into the assembly hole, and the end of the positioning pin away from the screw rod is provided with a positioning portion matching the tooth groove of the transmission gear.

2. The positioning tool for disassembling the water pump impeller nut according to claim 1, characterized in that: The side of the positioning pin is provided with a limiting groove arranged along the axial direction of the guide hole, and the side of the guide sleeve is provided with a limiting hole connected with the guide hole. The position of the limiting hole corresponds to the position of the limiting groove. A limiting column is inserted in the limiting hole, and the end of the limiting column is slidably matched with the limiting groove.

3. The positioning tool for disassembling the water pump impeller nut according to claim 1, characterized in that: A positioning sleeve is inserted into one end of the guide sleeve away from the shell, the positioning sleeve is provided with a positioning hole coaxially arranged with the guide hole, and the screw rod is provided with a connecting portion rotatably matched with the positioning hole.

4. The positioning tool for disassembling the water pump impeller nut according to claim 3, characterized in that: One end of the screw rod away from the assembly hole extends out of the positioning hole and is provided with a hand wheel.

5. The positioning tool for disassembling the water pump impeller nut according to claim 4, characterized in that: One end of the hand wheel close to the positioning sleeve abuts against the end of the positioning sleeve.

6. The positioning tool for disassembling the water pump impeller nut according to claim 3, characterized in that: The screw rod is provided with a limiting flange located in the guide hole, and one end of the limiting flange away from the assembly hole abuts against the end of the positioning sleeve.

7. The positioning tool for disassembling a water pump impeller nut according to claim 3, characterized in that: The positioning sleeve is threadedly connected to the guide hole. A positioning flange is provided on the positioning sleeve. One end of the positioning flange close to the guide sleeve abuts against the end of the guide sleeve.

8. The positioning tool for disassembling a water pump impeller nut according to claim 1, characterized in that: The positioning components are provided in multiple groups and arranged along the outer circumference of the housing.

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