Motor gear lossless dismounting device

Abstract

The utility model relates to the technical field of gear dismounting devices, in particular to a motor gear lossless dismounting device which comprises a hydraulic puller, the hydraulic puller comprises a hydraulic cylinder and a liquid nitrogen cover located on the outer side of the hydraulic cylinder, the bottom of the liquid nitrogen cover is provided with an opening, and the top of the liquid nitrogen cover is provided with a nitrogen charging opening and a sliding hole connected with the hydraulic cylinder in a sliding mode. The bottom of the opening and the inner side of the sliding hole are both sleeved with sealing rings, and the nitrogen filling opening is detachably connected with a plug. By arranging the liquid nitrogen cover, when the gear is disassembled, the output shaft of the motor is cooled firstly, the gap between the output shaft and the gear is increased after the output shaft of the motor is cooled and contracted, and then the gear is disassembled from the output shaft by using the hydraulic puller; and the gear cannot be damaged in the dismounting process.

Description

Technical Field

[0001] This utility model relates to the technical field of gear removal devices, specifically a non-destructive removal device for motor gears. Background Technology

[0002] When maintaining or repairing transmission equipment, it is necessary to disassemble the transmission. The gears on some high-precision transmission motors are closely connected to the motor output shaft, making disassembly difficult. Disassembly can easily damage the gears, and reinstallation can cause abnormal noise during equipment operation, seriously affecting the life of the gears. Utility Model Content

[0003] The main purpose of this utility model is to provide a non-destructive removal device for motor gears, so as to solve the problem that high-precision transmission motor gears are easily damaged after removal in the prior art.

[0004] To achieve the above objectives, this utility model provides a non-destructive removal device for motor gears, including a hydraulic puller. The hydraulic puller includes a hydraulic cylinder and a liquid nitrogen cover located outside the hydraulic cylinder. The liquid nitrogen cover has an opening at the bottom, a nitrogen filling port at the top, and a sliding hole that is slidably connected to the hydraulic cylinder.

[0005] Furthermore, sealing rings are fitted onto the bottom of the opening and the inside of the sliding hole.

[0006] Furthermore, the nitrogen filling port is detachably connected with a plug.

[0007] Furthermore, a movable pressure rod is connected to the top of the hydraulic cylinder, and a pull claw is connected to the bottom; a piston rod is movably connected inside the hydraulic cylinder, and a pin is fixedly connected to the bottom of the piston rod.

[0008] This invention, by setting up a liquid nitrogen cover, can first cool down the motor's output shaft when disassembling the gear. After the motor's output shaft cools and shrinks, the gap between the output shaft and the gear increases, and then a hydraulic puller is used to remove the gear from the output shaft; the gear will not be damaged during the disassembly process. Attached Figure Description

[0009] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0010] Figure 1 This is a schematic diagram showing the non-destructive removal device for motor gears in use in the embodiment.

[0011] In the diagram: 1. Hydraulic puller; 101. Hydraulic cylinder; 102. Puller claw; 103. Movable pressure rod; 104. Piston rod; 105. Ejector pin; 2. Liquid nitrogen cover; 201. Sliding hole; 202. Opening; 203. Nitrogen filling port; 204. Sealing ring; 205. Plug; 3. Motor; 4. Output shaft; 5. Gear. Detailed Implementation

[0012] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 As shown, according to an embodiment of the present invention, a non-destructive removal device for motor gears is provided, including a hydraulic puller 1. The hydraulic puller 1 includes a hydraulic cylinder 101 and a cylindrical liquid nitrogen cover 2 located outside the hydraulic cylinder 101. The liquid nitrogen cover 2 has an opening 202 at the bottom, a nitrogen filling port 203 at the top, and a sliding hole 201 that is slidably connected to the hydraulic cylinder 101.

[0014] A sealing ring 204 is fitted onto the bottom of the opening 202 of the liquid nitrogen cover 2 and the inside of the sliding hole 201; the sealing ring 204 can reduce the leakage of liquid nitrogen and nitrogen gas from the liquid nitrogen cover 2.

[0015] The nitrogen filling port 203 is detachably connected to a plug 205.

[0016] The top of the hydraulic cylinder 101 is connected to a movable pressure rod 103, and the bottom is connected to a pull claw 102; the inside of the hydraulic cylinder 101 is movably connected to a piston rod 104, and the bottom of the piston rod 104 is fixedly connected to a ejector pin 105.

[0017] like Figure 1 The motor 3 shown is equipped with an output shaft 4, and a gear 5 is mounted on the output shaft 4. When removing the gear 5, first, engage the pull claw 102 below the gear 5, and place the ejector pin 105 on top of the output shaft 4. Then, place the bottom of the liquid nitrogen cover 2 against the end cap of the motor 3, remove the plug 205, and pour some liquid nitrogen into the liquid nitrogen cover 2 through the nitrogen filling port 203. The liquid nitrogen cools the output shaft 4. During the cooling and contraction process of the output shaft 4, although the gear 5 is also cooling and contracting, the output shaft 4 contracts more significantly, and the gap between the output shaft 4 and the gear 5 still increases after cooling. Finally, operate the movable pressure rod 103 to pull the gear 5 outward. Due to the low temperature of liquid nitrogen, protective gloves should be worn during the operation to avoid frostbite.

[0018] In this embodiment, by setting up a liquid nitrogen cover 2, the output shaft 4 of the motor 3 can be cooled down first when disassembling the gear 5. After the output shaft 4 of the motor 3 is cooled down and shrinks, the gap between the output shaft 4 and the gear 5 increases. Then, the hydraulic puller 1 is used to remove the gear 5 from the output shaft 4. The gear 5 will not be damaged during the disassembly process.

[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A non-destructive removal device for motor gears, comprising a hydraulic puller (1), wherein the hydraulic puller (1) includes a hydraulic cylinder (101), characterized in that, It also includes a liquid nitrogen cover (2) located outside the hydraulic cylinder (101), the liquid nitrogen cover (2) having an opening (202) at the bottom, a nitrogen filling port (203) at the top, and a sliding hole (201) that is slidably connected to the hydraulic cylinder (101).

2. The non-destructive dismantling device for motor gears as described in claim 1, characterized in that, A sealing ring (204) is fitted onto the bottom of the opening (202) and the inside of the sliding hole (201).

3. The non-destructive removal device for motor gears as described in claim 1, characterized in that, The nitrogen filling port (203) is detachably connected to a plug (205).

4. The non-destructive dismantling device for motor gears as described in claim 1, characterized in that, The top of the hydraulic cylinder (101) is connected to a movable pressure rod (103), and the bottom is connected to a pull claw (102); the inside of the hydraulic cylinder (101) is movably connected to a piston rod (104), and the bottom of the piston rod (104) is fixedly connected to a pin (105).

Images