Coupling disassembling and assembling device for urban D-type train

Abstract

The utility model discloses a coupling dismounting device for a city D-type train, which relates to the technical field of urban rail transit vehicle maintenance, and comprises an oil injection screw, a limit nut, a hollow oil cylinder and a positioning press block, and an oil injection channel is arranged in the oil injection screw; a connecting sleeve head, a wrench clamping part, an adjusting thread section, a polished shaft section and an oil injection hole matching thread section are formed on the oil injection screw rod, the limiting nut is rotationally arranged on the adjusting thread section, the hollow oil cylinder and the positioning pressing block are arranged between the limiting nut and the oil injection hole matching thread section in a sliding mode, and the output end of the hollow oil cylinder points to the positioning pressing block; a positioning groove is formed in the positioning pressing block and matched with the step face on the periphery of the hole opening of the shaft matching hole. According to the utility model, the output end side of the hollow oil cylinder is provided with the positioning pressing block which is matched with the step surface at the periphery of the hole opening of the shaft matching hole, so that the coaxiality between the driving end of the hollow oil cylinder and the transmission shaft can be effectively controlled, unbalance loading stress is prevented from being generated, and unbalance loading damage is prevented from being caused.

Description

Technical Field

[0001] This utility model relates to the field of urban rail transit vehicle maintenance technology, specifically to a coupling assembly / disassembly device for a city D-type train. Background Technology

[0002] In the urban D-type train, the coupling is the connecting mechanism between the traction motor and the gearbox. Both the drive shaft end of the traction motor and the drive shaft end of the gearbox are equipped with couplings, and the couplings on the traction motor side and the couplings on the gearbox side are matched. Figure 1 The diagram shows a first cross-sectional view of the coupling and drive shaft of the D-type urban train. Figure 2 The diagram shows a second cross-sectional view of the coupling and drive shaft of the urban D-type train, including coupling 1, shaft mating hole 11, drive shaft 2, oil injection hole 21, and oil pressure channel 22.

[0003] When it is necessary to disassemble or assemble couplings on traction motors or gearboxes, specific devices are usually used to assist in the operation. For example, the invention patent application with application number 2019105011448 discloses a coupling disassembly and assembly device, including a hydraulic cylinder, a lead screw, and a stop nut. This device can not only press the coupling onto the drive shaft, but also push the coupling off the drive shaft by applying hydraulic pressure, thus facilitating the disassembly and assembly of couplings. However, this coupling disassembly and assembly device relies solely on the engagement and positioning of the lead screw with the oil injection hole in the drive shaft. The drive end of the hydraulic cylinder mounted on the lead screw lacks a positioning structure for the coupling or drive shaft, making it difficult to effectively control the coaxiality between the drive end of the hydraulic cylinder and the drive shaft. This can easily generate eccentric stress during the pressing operation of the coupling, causing eccentric damage to the coupling and drive shaft. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a coupling assembly and disassembly device. By setting a positioning pressure block on the output end side of the hollow cylinder that fits with the outer peripheral stepped surface of the shaft mating hole, the coaxiality between the drive end of the hollow cylinder and the transmission shaft can be effectively controlled, avoiding the generation of eccentric stress during the pressing operation of the coupling and preventing eccentric damage to the coupling and the transmission shaft.

[0005] This utility model provides a coupling assembly and disassembly device for a D-type urban train. The coupling assembly and disassembly device includes an oil injection screw, and a limiting nut, a hollow oil cylinder and a positioning pressure block that are sequentially sleeved on the oil injection screw from head to tail. An oil injection channel is provided through the oil injection screw from head to tail.

[0006] The oil injection screw is formed sequentially from head to tail as follows: a connecting sleeve, a wrench locking part, an adjusting thread section, a smooth shaft section, and an oil injection hole mating thread section. The limiting nut is rotatably mounted on the adjusting thread section. The hollow oil cylinder and the positioning pressure block are slidably mounted between the limiting nut and the oil injection hole mating thread section. The output end of the hollow oil cylinder points to the positioning pressure block.

[0007] The positioning block has a positioning groove formed on the side away from the hollow cylinder, and the positioning groove fits the stepped surface on the outer periphery of the shaft mating hole.

[0008] Specifically, a copper washer is embedded at the tail end of the oil injection screw, and a washer through hole is formed in the copper washer, which is connected to the oil injection channel.

[0009] Specifically, the connecting sleeve is provided with a transition joint.

[0010] Specifically, the thread of the adjusting thread section is an M24 standard thread.

[0011] Specifically, the thread of the threaded section of the oil injection hole is an M20 standard thread.

[0012] Specifically, the length of the adjusting thread section ranges from 5 to 10 cm.

[0013] Specifically, the length of the threaded section of the oil injection hole ranges from 3 to 5 cm.

[0014] Specifically, the coupling assembly / disassembly device further includes a first handheld hydraulic pump and a second handheld hydraulic pump. The first handheld hydraulic pump is connected to the connecting sleeve via a first oil pipe, and the second handheld hydraulic pump is connected to the hollow cylinder via a second oil pipe.

[0015] Specifically, a platform block is provided on the circumferential surface of the hollow oil cylinder, and a first bubble level and a second bubble level are embedded in the platform block. The first bubble level and the second bubble level are perpendicular to each other, and the first bubble level is arranged along the axial direction of the oil injection screw.

[0016] Specifically, the coupling assembly / disassembly device also includes an elastic buffer, which is movably sleeved on the oil injection screw and located between the limit nut and the hollow cylinder.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] In the coupling assembly / disassembly device of this utility model, a positioning block is provided on the output end side of the hollow cylinder. The side of the positioning block away from the hollow cylinder is formed with a positioning groove that fits with the outer peripheral stepped surface of the shaft mating hole. This positioning groove can accurately fit with the outer peripheral stepped surface of the shaft mating hole of the coupling, ensuring the coaxiality between the positioning block and the drive shaft. Therefore, using the positioning block as the drive end of the hollow cylinder to engage with the coupling can ensure that the hydraulic thrust of the hollow cylinder is evenly transmitted along the axial direction of the drive shaft, making the coupling uniformly stressed and effectively avoiding the generation of eccentric stress during the pressing operation of the coupling, thus preventing eccentric damage to the coupling and the drive shaft. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the first cross-sectional structure of the coupling and drive shaft of the D-type urban train;

[0021] Figure 2 This is a schematic diagram of the second cross-sectional structure of the coupling and drive shaft of the D-type urban train;

[0022] Figure 3 This is a first structural schematic diagram of the coupling disassembly and assembly device in this utility model embodiment;

[0023] Figure 4 This is a schematic diagram of the coupling assembly / disassembly device, coupling, and transmission shaft assembly structure in an embodiment of this utility model.

[0024] Figure 5 yes Figure 4 Enlarged structural diagram of region A in the middle;

[0025] Figure 6 This is a schematic diagram of the transition joint in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the first bubble level and the second bubble level in the embodiments of this utility model;

[0027] Figure 8 This is a second structural schematic diagram of the coupling disassembly and assembly device in an embodiment of this utility model.

[0028] In the attached diagram: 1. Coupling; 11. Shaft mating hole; 2. Drive shaft; 21. Oil injection hole; 22. Hydraulic channel; 100. Oil injection screw; 110. Oil injection channel; 120. Connecting sleeve; 130. Wrench locking part; 140. Adjusting thread section; 150. Plain shaft section; 160. Oil injection hole mating thread section; 170. Copper washer; 180. Transition joint; 200. Limit nut; 300. Hollow cylinder; 301. Platform block; 310. First bubble level; 320. Second bubble level; 400. Positioning pressure block; 410. Positioning groove; 500. Elastic buffer; 510. Rubber pad; 520. Steel sheet. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] This utility model provides a coupling assembly / disassembly device for a D-type urban train. Figure 3 This diagram shows a first structural schematic of the coupling disassembly and assembly device in an embodiment of the present invention. The device includes an oil injection screw 100, a limiting nut 200, a hollow oil cylinder 300, and a positioning block 400 sequentially fitted onto the oil injection screw 100 from beginning to end. An oil injection channel 110 is provided through the oil injection screw 100 from beginning to end. The oil injection screw 100 is sequentially formed from beginning to end with a connecting sleeve 120, a wrench locking part 130, an adjusting thread section 140, a smooth shaft section 150, and... The oil injection hole is fitted with the threaded section 160. The limiting nut 200 is rotatably mounted on the adjusting threaded section 140. The hollow cylinder 300 and the positioning block 400 are slidably mounted between the limiting nut 200 and the threaded section 160 of the oil injection hole. The output end of the hollow cylinder 300 points to the positioning block 400. The positioning block 400 has a positioning groove 410 formed on the side away from the hollow cylinder 300. The positioning groove 410 fits the stepped surface on the outer periphery of the shaft fitting hole.

[0031] In the coupling assembly and disassembly device of this utility model, a positioning block 400 is provided on the output end side of the hollow cylinder 300. The positioning block 400 has a positioning groove 410 formed on the side away from the hollow cylinder 300, which fits with the outer peripheral stepped surface of the shaft mating hole. Figure 4The diagram shows the coupling assembly / disassembly device, coupling, and drive shaft assembly structure in an embodiment of this utility model. The positioning groove 410 can precisely mate with the outer peripheral stepped surface of the shaft mating hole of the coupling, ensuring the coaxiality between the positioning block 400 and the drive shaft. Therefore, by using the positioning block 400 as the driving end of the hollow cylinder 300 to mate with the coupling, the hydraulic thrust of the hollow cylinder 300 can be uniformly transmitted along the axial direction of the drive shaft, resulting in uniform force on the coupling and effectively avoiding eccentric stress during the pressing operation of the coupling, thus preventing eccentric damage to the coupling and drive shaft.

[0032] In some specific embodiments, the oil injection screw 100 is made of high-strength alloy material or high-strength stainless steel material, which is durable.

[0033] Figure 5 It shows Figure 4 The enlarged structural diagram of area A shows that a copper gasket 170 is embedded at the tail end of the oil injection screw 100. The copper gasket 170 has a through hole that communicates with the oil injection channel 110. The copper gasket 170 has a certain degree of flexibility; when the oil injection screw 100 abuts against the bottom of the oil injection hole, the copper gasket 170 effectively enhances the sealing between the oil injection channel 110 and the oil pressure channel, preventing oil leakage during the oil injection and pressurization process, resulting in a good pressurization effect.

[0034] Figure 6 A schematic diagram of the transition joint in an embodiment of the present invention is shown. The connecting sleeve 120 is provided with a transition joint 180. The transition joint 180 is used to connect the oil injection screw 100 and the oil pipeline. The transition joint 180 is an ultra-high pressure joint and can work under pressures above 100MPa.

[0035] In some specific embodiments, the thread of the adjusting thread section 140 is an M24 standard thread, which makes the limiting nut 200 mated on the adjusting thread section 140 easy to turn by hand, and at the same time helps to reduce the axial clearance between the limiting nut 200 and the oiling screw 100.

[0036] Specifically, the length of the adjusting thread section 140 is 5 to 10 cm, so that the limiting nut 200 has a suitable axial movement range, which facilitates the adjustment of the position of the hollow cylinder 300.

[0037] In some specific embodiments, the thread of the threaded section 160 of the oil injection hole is an M20 standard thread, which is adapted to the internal thread of the oil injection hole. Specifically, the length of the threaded section 160 of the oil injection hole is 3 to 5 cm, so that the threaded section 160 of the oil injection hole is long enough to ensure a stable connection between the oil injection screw 100 and the drive shaft, and to effectively distribute the load.

[0038] In some specific embodiments, the coupling disassembly and assembly device further includes a first handheld hydraulic pump and a second handheld hydraulic pump. The first handheld hydraulic pump is connected to the connecting sleeve 120 via a first oil pipe, and the second handheld hydraulic pump is connected to the hollow cylinder 300 via a second oil pipe. The first handheld hydraulic pump is used to provide high-pressure hydraulic oil to the oiling screw 100 to push the coupling off the drive shaft; the second handheld hydraulic pump is used to provide high-pressure hydraulic oil to the hollow cylinder 300 to push the positioning pressure block 400 along the axial direction of the oiling screw 100 to apply pressure to the coupling.

[0039] Figure 7 The diagram illustrates the structure of the first and second bubble levels in an embodiment of this invention. A platform block 301 is provided on the circumferential surface of the hollow oil cylinder 300. The first bubble level 310 and the second bubble level 320 are embedded in the platform block 301. The first bubble level 310 and the second bubble level 320 are perpendicular to each other, and the first bubble level 310 is arranged along the axial direction of the oil injection screw 100. The first bubble level 310 and the second bubble level 320 can detect whether the oil injection screw 100 installed in the oil injection hole is tilted, ensuring that the oil injection screw 100 is used under normal conditions.

[0040] Figure 8 The diagram shows a second structural schematic of the coupling disassembly and assembly device in an embodiment of the present invention. The coupling disassembly and assembly device further includes an elastic buffer 500, which is movably sleeved on the oil injection screw 100. The elastic buffer 500 is located between the limiting nut 200 and the hollow oil cylinder 300. The elastic buffer 500 can buffer the instantaneous impact generated when the coupling is pushed down by oil pressure, which is beneficial to protecting the limiting nut 200, the adjusting thread section 140 and the hollow oil cylinder 300.

[0041] For details, please refer to Figure 8 The elastic buffer 500 includes a rubber pad 510 and steel sheets 520 bonded to both sides of the rubber pad 510. The thickness of the rubber pad 510 is 5-10 mm, which has a good buffering effect. The thickness of the steel sheet 520 is 1-2 mm, which can effectively protect the rubber pad 510 and ensure the flatness of the contact between the elastic buffer 500 and the limiting nut 200 and the hollow cylinder 300.

[0042] In some specific embodiments, an oxide film is formed on the surface of the oil injection screw 100, the surface of the limiting nut 200, and the surface of the positioning block 400. This oxide film is a dense, smooth, and dark iron oxide film, which can isolate air and has good corrosion resistance, so that the coupling assembly and disassembly device can operate stably under harsh working conditions such as humidity and dust.

[0043] In some specific embodiments, the positioning block 400 is formed by machining, die casting, or 3D printing. Specifically, the positioning block 400 undergoes quenching treatment, resulting in good hardness and durability.

[0044] The method of using the coupling assembly / disassembly device for the D-type urban train of this utility model is as follows:

[0045] First, screw the oil filling hole of the oil filling screw 100 into the oil filling hole of the drive shaft using the threaded section 160, and screw the tail end of the oil filling screw 100 to the bottom of the oil filling hole; the oil filling screw 100 can be turned by holding the wrench retaining part 130 with a wrench.

[0046] Next, the positioning block 400, hollow cylinder 300, elastic buffer 500 (required when disassembling the coupling) and limit nut 200 are sequentially installed on the oil injection screw 100. The positioning groove 410 of the positioning block 400 is matched with the outer peripheral stepped surface of the shaft mating hole. The position of the limit nut 200 on the adjusting thread section 140 is also adjusted to press the hollow cylinder 300 against the positioning block 400.

[0047] Then, connect the first hand-held hydraulic pump to the connecting sleeve 120 of the oil injection screw 100, and connect the second hand-held hydraulic pump to the hollow cylinder 300.

[0048] When installing the coupling, first use the first hand-held hydraulic pump to inject lubricating oil into the interface between the drive shaft and the coupling, and then use the second hand-held hydraulic pump to drive the hollow cylinder 300 to push the positioning block 400 to press the coupling onto the drive shaft, thus completing the installation of the coupling; the positioning groove 410 of the positioning block 400 controls the pressing depth of the coupling on the drive shaft to prevent the coupling from being pressed in too much;

[0049] When disassembling the coupling, the first hand-held hydraulic pump is used to increase the oil pressure between the drive shaft and the coupling. The oil pressure is used to push the coupling off the drive shaft, completing the disassembly. During disassembly, the limit nut 200, elastic buffer 500, hollow cylinder 300, and positioning block 400 together hold the coupling in place, preventing the coupling from suddenly popping out and causing damage to itself or the operator. At the same time, the elastic buffer 500 can buffer the instantaneous impact generated when the coupling is pushed down by the oil pressure, which helps protect the limit nut 200, adjusting thread section 140, and hollow cylinder 300.

[0050] The coupling assembly / disassembly device of this utility model, by setting a positioning block 400 on the output end side of the hollow cylinder 300, which fits with the outer peripheral stepped surface of the shaft mating hole, can effectively control the coaxiality between the drive end of the hollow cylinder 300 and the transmission shaft. This ensures that the hydraulic thrust of the hollow cylinder 300 is transmitted evenly along the axial direction of the transmission shaft, so that the coupling is subjected to uniform force. This effectively avoids the generation of eccentric stress during the pressing operation of the coupling, and prevents eccentric damage to the coupling and the transmission shaft. At the same time, the positioning groove 410 of the positioning block 400 controls the pressing depth of the coupling on the transmission shaft, preventing the coupling from being pressed in too much.

[0051] Moreover, when disassembling the coupling, the limit nut 200, elastic buffer 500, hollow cylinder 300 and positioning block 400 together hold the coupling in place, which can prevent the coupling from suddenly popping out and causing damage to itself or the operator. At the same time, the elastic buffer 500 can buffer the instantaneous impact generated when the coupling is pushed down by hydraulic pressure, which helps to protect the limit nut 200, adjusting thread section 140 and hollow cylinder 300.

[0052] Furthermore, the oil injection screw 100 is coaxially connected to the oil injection hole of the drive shaft via the oil injection hole and the threaded section 160. A copper washer 170 is embedded at the tail end of the oil injection screw 100, which can effectively enhance the sealing between the oil injection channel 110 and the oil pressure channel, prevent oil leakage during the oil injection and pressurization process, and achieve good pressurization effect. The hollow oil cylinder 300 is equipped with a first bubble level 310 and a second bubble level 320, which can detect whether the posture of the oil injection screw 100 installed in the oil injection hole is skewed, so as to ensure that the oil injection screw 100 is used under normal conditions.

[0053] Actual testing showed that using the coupling disassembly and assembly device of this invention to disassemble and assemble the couplings of the D-type train in the urban area reduced the probability of off-center load damage by 90%, significantly improving the reliability and stability of the couplings and drive shafts.

[0054] The above provides a detailed description of a coupling assembly / disassembly device for a D-type urban train provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A coupling assembly / disassembly device for a D-type urban rail train, characterized in that, The coupling assembly / disassembly device includes an oil injection screw, and a limit nut, a hollow cylinder and a positioning block that are sequentially fitted onto the oil injection screw from head to tail. An oil injection channel is provided through the oil injection screw from head to tail. The oil injection screw is formed sequentially from head to tail as follows: a connecting sleeve, a wrench locking part, an adjusting thread section, a smooth shaft section, and an oil injection hole mating thread section. The limiting nut is rotatably mounted on the adjusting thread section. The hollow oil cylinder and the positioning pressure block are slidably mounted between the limiting nut and the oil injection hole mating thread section. The output end of the hollow oil cylinder points to the positioning pressure block. The positioning block has a positioning groove formed on the side away from the hollow cylinder, and the positioning groove fits the stepped surface on the outer periphery of the shaft mating hole.

2. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, The tail end of the oil injection screw is fitted with a copper gasket, and the copper gasket has a gasket through hole, which is connected to the oil injection channel.

3. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, The connecting sleeve is equipped with a transition joint.

4. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, The thread of the adjusting thread section is an M24 standard thread.

5. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, The thread of the oil injection hole mating thread section is an M20 standard thread.

6. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, The length of the adjusting thread section ranges from 5 to 10 cm.

7. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, The length of the threaded section of the oil injection hole is 3 to 5 cm.

8. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, The coupling assembly / disassembly device also includes a first handheld hydraulic pump and a second handheld hydraulic pump. The first handheld hydraulic pump is connected to the connecting sleeve via a first oil pipe, and the second handheld hydraulic pump is connected to the hollow cylinder via a second oil pipe.

9. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, A platform block is provided on the circumferential surface of the hollow oil cylinder. A first bubble level and a second bubble level are embedded in the platform block. The first bubble level and the second bubble level are perpendicular to each other. The first bubble level is arranged along the axial direction of the oil injection screw.

10. The coupling assembly / disassembly device for urban D-type trains as described in claim 1, characterized in that, The coupling assembly / disassembly device also includes an elastic buffer element, which is movably sleeved on the oil injection screw and located between the limit nut and the hollow oil cylinder.

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