Hollow shaft and gear installation tool assembly

Abstract

The utility model discloses a hollow shaft and gear installation tool assembly, which relates to the field of gear box installation tools and comprises a gear installation frame arranged on a gear and a hollow shaft installation frame arranged on a hollow shaft. The gear mounting frame comprises a horizontal part and a vertical part; the horizontal part and the vertical part are provided with high-pressure oil channels; the hollow shaft mounting frame comprises a lead screw penetrating through the hollow shaft, and the two ends of the lead screw extend out of the left end face and the right end face of the hollow shaft. The left end of the lead screw is connected with a front pushing disc; the left end of the lead screw is in threaded connection with the front pushing disc; the middle part of the hollow shaft is sleeved with a rear stop sleeve; a stop disc is arranged on the outer side of the rear stop sleeve; a hydraulic cylinder is arranged outside the right end surface of the stop disc; a locking nut is arranged on the outer side of the hydraulic cylinder, connected with the lead screw and used for installation of a hollow shaft and a gear of the gearbox.

Description

Technical Field

[0001] The utility model relates to a gear box installation tool, in particular to a hollow shaft and gear installation tool assembly. Background Art

[0002] Gearbox housings can be divided into integral housings and split housings. The hollow shaft and gear are installed in a gearbox with an integral housing. This type of gearbox is usually used in low-floor trams and has the following characteristics:

[0003] The low-floor gearbox lowers the vehicle's floor height, allowing passengers to easily board without having to climb steps, making it particularly suitable for people with limited mobility, such as the elderly and disabled. The low-floor design allows tracks to be laid directly on the road, eliminating the need for platform construction and reducing the cost of urban rail transit. The low-floor design not only provides convenience for passengers but also reduces vibration and noise during operation, enhancing the riding experience. Low-floor vehicles are suitable for use as feeder lines in large cities and trunk lines in medium-sized cities, offering high flexibility and adaptability. Their compact structure simplifies maintenance and overhaul, reducing maintenance costs.

[0004] The biggest differences between low-floor gearboxes and standard gearboxes lie in the housing and output structure. This gearbox is integral and cannot be disassembled, whereas standard gearboxes have separate upper and lower housings. Due to limited bogie space, this gearbox's output uses a hollow shaft, while standard gearboxes use a solid shaft. Using existing installation tools, the assembly of the gears and hollow shaft requires manual labor, placing significant strain on production workers and potentially causing long-term health problems.

[0005] The inner hole of the gear and the outer diameter of the shaft form a tapered interference fit, necessitating cold pressing for assembly. Using existing installation techniques results in low efficiency and precision, failing to meet design requirements. This prevents the gearbox from functioning properly and poses significant safety risks, potentially leading to vehicle accidents. Utility Model Content

[0006] In response to the deficiencies in the above-mentioned prior art, the utility model provides a hollow shaft and gear installation tooling assembly with a simple structure, easy installation, improved installation efficiency, ensured installation accuracy, reduced installation costs, improved gearbox product quality, and guaranteed safe operation of the vehicle.

[0007] The technical solution adopted by this utility model is:

[0008] A hollow shaft and gear mounting tool assembly includes: a gear mounting frame arranged on the gear and a hollow shaft mounting frame arranged on the hollow shaft;

[0009] The gear mounting frame includes: a horizontal portion and a vertical portion;

[0010] The horizontal part and the vertical part are provided with high-pressure oil channels;

[0011] The oil inlet of the high-pressure oil channel is arranged above the horizontal portion;

[0012] The oil outlet of the high-pressure oil channel is arranged on the side of the vertical part, corresponding to the position of the gear oil inlet;

[0013] The hollow shaft mounting frame includes: a lead screw penetrating the hollow shaft, with both ends of the lead screw extending from the left end face and the right end face of the hollow shaft;

[0014] The left end of the lead screw is connected to the front push disc; a threaded hole is provided in the center of the front push disc;

[0015] The left end of the lead screw is threadedly connected to the front pushing disc;

[0016] The inner end face of the front push disc fits into the left end face of the hollow shaft;

[0017] The middle part of the hollow shaft is provided with a rear stop sleeve;

[0018] A stop disc is provided on the outside of the rear stop sleeve;

[0019] The left end face of the rear stop sleeve fits into the right end face of the gear;

[0020] The right end surface of the rear stop sleeve fits into the left end surface of the stop disc;

[0021] A hydraulic cylinder is provided on the outer side of the right end surface of the stop disc;

[0022] The left end surface of the hydraulic cylinder body is in contact with the right end surface of the stop disc;

[0023] A through hole is provided in the center of the hydraulic cylinder;

[0024] The lead screw passes through the through hole of the hydraulic cylinder;

[0025] A locking nut is provided on the right side of the hydraulic cylinder, and the locking nut is connected to the lead screw.

[0026] Preferably, the right end of the front pushing disc is embedded in the left end surface of the hollow shaft.

[0027] Preferably, the front end of the left end surface of the stop disc is embedded in the right end surface of the rear stop sleeve.

[0028] The beneficial effects of this utility model compared to the prior art are:

[0029] The utility model uses a lifting tool to replace manual handling during the lifting process of the gear and hollow shaft, which improves work efficiency and reduces the physical burden on the operator. The utility model uses tooling control throughout the assembly process, which has high precision, ensuring product quality while avoiding damage to the workpiece and waste of work time caused by the misalignment of the gear and hollow shaft in the existing technology.

[0030] The utility model discloses a hollow shaft and gear installation tool assembly, which has a simple structure and is easy to install, thereby improving installation efficiency, ensuring installation accuracy, reducing installation costs, preventing deformation of the hollow shaft, improving gearbox product quality, and ensuring safe operation of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the hollow shaft and gear pre-installation of the hollow shaft and gear installation tool assembly of the utility model;

[0032] Figure 2 This is a schematic diagram of the installation structure of the hollow shaft and the gear mounting frame of the gear mounting fixture assembly of the utility model;

[0033] Figure 3 This is a schematic diagram of the gear structure of the hollow shaft and gear installation tooling assembly of the utility model;

[0034] Figure 4 This is a three-dimensional structural diagram of the hollow shaft and gear installation tooling assembly of the utility model;

[0035] Figure 5 This is a schematic diagram of the gear mounting frame structure of the hollow shaft and gear mounting fixture assembly of the utility model;

[0036] Figure 6 The utility model is a schematic diagram of the hollow shaft hanging frame structure of the hollow shaft and gear installation tooling assembly.

[0037] Description of the main components in the accompanying drawings:

[0038] In the picture:

[0039] 1. Gear 2. Gear mounting bracket

[0040] 3. Gear oil inlet 4. Gear connection hole

[0041] 5. Screw 6. Hollow shaft

[0042] 7. Front push disc 8. Rear stop sleeve

[0043] 9. Stop disc 10. Hydraulic cylinder

[0044] 11. Lock nut 12. Hydraulic pipe

[0045] 13. Hollow shaft hoisting frame 14. Left bearing

[0046] 15. High-pressure oil channel inlet 16. High-pressure oil channel outlet

[0047] 17. Through hole

[0048] 21. Horizontal part 22. Vertical part DETAILED DESCRIPTION

[0049] The present invention will be described in detail below with reference to the accompanying drawings and embodiments:

[0050] Attachment Figure 1-6 It can be seen that a hollow shaft and gear installation tooling assembly,

[0051] It includes: a gear mounting frame 2 arranged on the gear 1 and a hollow shaft mounting frame arranged on the hollow shaft 6;

[0052] like Figure 5 The gear mounting frame 2 includes a horizontal portion 21 and a vertical portion 22 .

[0053] like Figure 3 There are two gear connection holes 4 and a gear oil inlet 3 on the gear 1. The gear mounting frame 2 is also provided with two through holes 17 and a high-pressure oil channel oil outlet 16. Use two bolts to pass through the two through holes 17 on the gear mounting frame and screw them into the two gear connection holes 4 on the gear 1. The gear mounting frame 2 is fixed to the gear 1 together.

[0054] like Figure 4 , the gear 1 is arranged in the gear box body; the two sides of the gear 1 are the side walls of the gear box body; after the gear mounting frame 2 is fixed to the gear 1, the two sides of the horizontal part 21 of the gear 1 mounting frame can be directly placed on the upper end surface of the box body side wall, and the two through holes 17 and the one high-pressure oil channel oil outlet 16 on the gear mounting frame 2 correspond to the two threaded holes and the one gear oil inlet 3 on the gear.

[0055] like Figure 5 , high-pressure oil channels are provided inside the horizontal portion 21 and the vertical portion 22;

[0056] The high-pressure oil channel oil inlet 15 is arranged above the horizontal portion 21;

[0057] The high-pressure oil channel oil outlet 16 is arranged on the side of the vertical portion 22, corresponding to the position of the gear oil inlet 3;

[0058] The end face of the gear 1 is provided with a gear oil inlet 3 and a gear connecting hole 4;

[0059] A copper gasket is provided at the oil outlet 16 of the high-pressure oil channel on the gear mounting frame 2. The gear 1 and the gear mounting frame 2 are connected by bolts. When the bolts are tightened, the copper gasket is squeezed and deformed to prevent oil leakage.

[0060] The gear oil outlet is located on the inner hole of gear 1, and the hydraulic oil does not return to the oil tank but flows directly into the box.

[0061] The pressure trolley provides high-pressure oil, and the high pressure generated by the high-pressure oil can expand the inner hole of the gear.

[0062] like Figure 1 and Figure 2 The ring on the gear mounting frame 2 is the lifting ring. Human power cannot lift the gear. Pass the lifting belt through the lifting ring and operate the crane to lift the gear 1.

[0063] The hollow shaft mounting frame includes: a screw 5 passing through the hollow shaft 6, with both ends of the screw 5 extending from the left end face and the right end face of the hollow shaft 6;

[0064] The left end of the lead screw is connected to the front push disc 7; a threaded hole is provided in the center of the front push disc 7;

[0065] The left end of the lead screw 5 is threadedly connected to the front push disc 7;

[0066] The right end surface of the front push disc 7 is in contact with the left end surface of the hollow shaft 6;

[0067] A rear stop sleeve 8 is sleeved on the middle of the hollow shaft 6;

[0068] The inner diameter of the rear stop sleeve 8 is larger than the outer diameter of the hollow shaft 6, and the outer diameter of the rear stop sleeve 8 is smaller than the inner diameter of the mounting hole of the output shaft of the gear box body. The left end of the rear stop sleeve 8 passes through the mounting hole of the output shaft of the gear box body, and the left end face of the rear stop sleeve 8 fits with the right end face of the gear 2;

[0069] A stop disc 9 is provided on the outside of the rear stop sleeve 8;

[0070] The right end surface of the rear stop sleeve 8 is in contact with the left end surface of the stop disc 9;

[0071] A hydraulic cylinder 10 is provided on the outer side of the right end surface of the stop disc 9;

[0072] The left end face of the hydraulic cylinder 10 is in contact with the right end face of the stop disc 9;

[0073] A through hole is provided in the center of the hydraulic cylinder;

[0074] The lead screw passes through the through hole of the hydraulic cylinder 10;

[0075] A locking nut 11 is provided on the outer side of the right end surface of the hydraulic cylinder 10 , and the locking nut 11 is threadedly connected to the lead screw 5 .

[0076] The locking nut 11 is used to ensure that one end of the hydraulic cylinder is kept stationary when the hydraulic cylinder is pushed.

[0077] Preferably, the diameter of the through hole is larger than the diameter of the lead screw 5 .

[0078] Preferably, the right end surface of the front pushing disc 7 is embedded in the left end surface of the hollow shaft.

[0079] Preferably, the front end of the left end surface of the stopping disc 9 is embedded in the right end surface of the rear stopping sleeve 8 .

[0080] The installation sequence of the hollow shaft and gear installation tooling assembly of the utility model is as follows:

[0081] 1. First use the gear mounting frame 2 to connect the gear 1. The gear mounting frame 2 and the gear 1 become one. Operate the crane to lift the gear mounting frame 2 and place the gear mounting frame 2 on the output end of the box to ensure that the inner hole of the gear is concentric with the mounting hole of the output shaft of the gear box.

[0082] Hydraulic oil is injected into the gear oil channel hole through the gear mounting bracket 2; it is used to increase the inner diameter of the gear 1 and facilitate the installation of the hollow shaft 6; at this time, the mounting hole of the output shaft of the gear box is concentric with the inner hole of the gear; the gear position is fixed;

[0083] The hollow shaft 6 is hoisted using the hollow shaft hoisting frame 13. The hollow shaft hoisting frame 13 only needs to be inserted into the inner hole of the hollow shaft 6, and the vertical portion of the hollow shaft hoisting frame 13 contacts the end of the hollow shaft 6. During the hoisting process, the hollow shaft hoisting frame 13 and the hollow shaft 6 are positioned in a fixed position. The hollow shaft hoisting frame 13 only serves the purpose of hoisting. To reduce the operator's workload, the operator should hold the hollow shaft 6 by hand during the entire hoisting process so that its position does not change.

[0084] 2. Install the hollow shaft mounting bracket, insert the left end of the screw 5 from the mounting hole of the gear box output shaft on the right side of the gear box, and let the screw 5 pass through the hollow shaft 6. Place the front push disc 7 on the left side of the hollow shaft 6 and screw it into the center threaded hole of the front push disc 7. After the left end of the screw 5 is connected to the front push disc 7, install the rear stop sleeve 8, stop disc 9, hydraulic cylinder 10 and lock nut 11 in sequence.

[0085] 3. Insert the left end of the rear stop sleeve 8 from the mounting hole of the gear box output shaft on the right side of the gear box body, and the left end of the rear stop sleeve 8 contacts the right end face of the gear 1.

[0086] 4. Screw the locking nut 11 onto the screw 5, close to the right end face of the hydraulic cylinder 10.

[0087] 5. Hydraulic oil enters the oil channel of gear 1 through hydraulic pipe 12 and gear mounting frame 2; the inner hole of the gear expands under the action of hydraulic oil; start hydraulic cylinder 10. During the pushing process, the left side of hydraulic cylinder 10 does not move, and the right side of hydraulic cylinder 10 pushes locking nut 11. Locking nut 11 drives screw 5 to move to the right, and screw 5 drives front pushing disc 7 to move to the right. The front pushing disc 7 drives hollow shaft 6 to move to the right. When the right end face of left bearing 14 on hollow shaft 6 contacts the left end face of gear 1, hollow shaft 6 is subjected to reverse thrust and stops moving, and assembly is completed.

[0088] 6. Remove the hollow shaft mounting frame and gear mounting frame 2.

[0089] The mounting surface where the hollow shaft 6 contacts the gear 1 is a conical surface; during the installation process, hydraulic oil is injected into the hydraulic cylinder 10, and the hydraulic cylinder 10 drives the screw 5 to push the hollow shaft 6 to move. The hollow shaft 6 and the gear 1 are installed in place, and the oil injection into the gear oil inlet 3 is stopped; the oil injection into the hydraulic cylinder 10 is stopped; and the gear mounting frame 2 and the hollow shaft mounting frame are removed.

[0090] During the assembly process, the tooling will pull the shaft through the hydraulic cylinder for assembly positioning. During the assembly process, the position of gear 1 remains stationary, and the hollow shaft 6 is driven to move by the hydraulic cylinder 10, thereby realizing the assembly of the hollow shaft 6 and the gear 1.

[0091] The utility model discloses a hollow shaft and gear installation tool assembly, which has a simple structure and is easy to install, thereby improving installation efficiency, ensuring installation accuracy, reducing installation costs, improving gear box product quality, and ensuring safe operation of vehicles.

[0092] The above description is only a preferred embodiment of the present invention and does not constitute any formal limitation on the structure of the present invention. Any simple modification, equivalent change and modification of the above embodiment based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A hollow shaft and gear mounting fixture assembly, characterized in that: include: A gear mounting frame (2) disposed on the gear (1) and a hollow shaft mounting frame disposed on the hollow shaft (6); The gear mounting frame (2) comprises a horizontal portion (21) and a vertical portion (22); The horizontal portion (21) and the vertical portion (22) are provided with high-pressure oil channels; The oil inlet (15) of the high-pressure oil channel is arranged above the horizontal portion (21); The high-pressure oil channel oil outlet (16) is arranged on the side of the vertical portion (22) and corresponds to the position of the gear oil inlet (3); The hollow shaft mounting frame comprises: a screw (5) penetrating the hollow shaft (6), with both ends of the screw (5) extending from the left end face and the right end face of the hollow shaft (6); The left end of the lead screw (5) is connected to the front push disc (7); a threaded hole is provided at the center of the front push disc (7); The left end of the lead screw (5) is threadedly connected to the front push disc (7); The inner end surface of the front push disc (7) is fitted with the left end surface of the hollow shaft (6); A rear stop sleeve (8) is sleeved on the middle of the hollow shaft (6); A stop disc (9) is provided on the outside of the rear stop sleeve (8); The left end face of the rear stop sleeve (8) is fitted with the right end face of the gear (1); The right end surface of the rear stop sleeve (8) is fitted with the left end surface of the stop disc (9); A hydraulic cylinder (10) is provided on the outer side of the right end surface of the stop disc (9); The left end surface of the hydraulic cylinder (10) is in contact with the right end surface of the stop disc (9); A through hole is provided at the center of the hydraulic cylinder (10); The lead screw (5) passes through the through hole of the hydraulic cylinder (10); A locking nut (11) is provided on the right side of the hydraulic cylinder, and the locking nut (11) is connected to the lead screw (5).

2. The hollow shaft and gear installation tooling assembly according to claim 1, characterized in that: The right end of the front pushing disc (7) is embedded in the left end surface of the hollow shaft (6).

3. The hollow shaft and gear installation tooling assembly according to claim 1, characterized in that: The front end of the left end face of the stop disc (9) is embedded in the right end face of the rear stop sleeve (8).

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