A hydraulic pump motor overhauling turnover device

Abstract

The application provides a hydraulic pump motor overhaul turnover device, which comprises a base, the base comprises a bottom frame, two vertical columns which are fixed on the bottom frame and oppositely arranged, two bearing seats which are respectively fixed on the two vertical columns and oppositely arranged, and a U-shaped workbench, two vertical parts of the U-shaped workbench are respectively fixed with inner rings of the two bearing seats through fixing shafts, and the U-shaped workbench can rotate around the fixing shafts. The application solves the technical problem that the traditional turnover tool is difficult to turn over the hydraulic pump motor.

Description

Technical Field

[0001] This application relates to the technical field of overhauling core components of hydraulic systems for large railway maintenance machinery, specifically, to a turning device for overhauling hydraulic pump motors. Background Technology

[0002] Currently, the hydraulic pump motors of large railway maintenance machinery require a large amount of maintenance, but there are no special tools for overturning and repairing them. Furthermore, due to the high price of imported pump motors, using efficient and reliable tooling can save a significant amount of maintenance time and costs.

[0003] Due to the large weight of hydraulic pump motors, it is difficult to turn them over using traditional tools such as electric hoists and overhead cranes, resulting in low maintenance efficiency and wasted time. Furthermore, since hydraulic pump motors come in various specifications and models with different installation dimensions, easy disassembly is required during maintenance. Turning hydraulic pump motors also poses significant safety hazards, easily causing injury to personnel during maintenance. Finally, the high precision required for installation makes it easy to damage components during assembly.

[0004] Therefore, traditional turning tools have difficulty turning hydraulic pump motors, which is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may contain information that is not part of the prior art known to those skilled in the art. Utility Model Content

[0006] This application provides a hydraulic pump motor to solve the technical problem that traditional turning tools are difficult to use with hydraulic pump motors.

[0007] This application provides a turning device for overhauling a hydraulic pump motor, comprising:

[0008] The base includes a base frame and two uprights fixed on the base frame and arranged opposite to each other;

[0009] Two bearings with mounting brackets are respectively fixed on the two columns, and the two bearings with mounting brackets are arranged opposite to each other;

[0010] The U-shaped worktable has two vertical sections and the inner rings of the two bearing seats fixed by a fixed shaft, and the U-shaped worktable can rotate around the fixed shaft.

[0011] The embodiments of this application, by adopting the above technical solutions, have the following technical effects:

[0012] The hydraulic pump motor overhaul tilting device of this application connects the two vertical sections of a U-shaped worktable to the inner rings of bearings fixed on a column, and is rigidly fixed by a fixed shaft. This allows the U-shaped worktable to rotate 360° around the center line of the fixed shaft, achieving tilting without blind spots, facilitating the overhaul and assembly of the hydraulic pump motor. When overhauling large and heavy-duty hydraulic pump motors, operators can adjust their spatial posture at any time as needed, precisely rotating the part to be inspected to a position that is easy to observe and operate.

[0013] When hoisting and fixing the hydraulic pump motor, the U-shaped workbench is laid flat with its opening facing upwards, which facilitates fixing the hydraulic pump motor.

[0014] After the hydraulic pump motor is fixed on the U-shaped workbench, the attitude of the hydraulic pump motor is adjusted so that the U-shaped workbench is tilted or upright. Hydraulic pump motors are usually quite long, especially multi-stage hydraulic pump motors. Due to the presence of the U-shaped workbench, the center of gravity of the U-shaped workbench and the center of gravity of the hydraulic pump motor are located on opposite sides of the column. This results in a smaller deviation of the center of gravity of the U-shaped workbench and the hydraulic pump motor as a whole from the column, making the tilting device for hydraulic pump motor maintenance of this application highly stable and minimizing the risk of tipping over.

[0015] Without a U-shaped worktable, the hydraulic pump motor is directly connected to two bearings with mounting brackets. The center of gravity of the hydraulic pump motor of the same size will shift significantly, which may easily lead to the risk of tipping over.

[0016] In addition, the base adopts an integral base structure consisting of a bottom frame and two columns, which has good rigidity and stability and can withstand the large weight of the hydraulic pump motor and the dynamic load during the flipping process. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a perspective view of the turning device for hydraulic pump motor maintenance according to this application;

[0019] Figure 2 This is a bottom view of the tilting device for hydraulic pump motor maintenance according to this application;

[0020] Figure 3 This is a schematic diagram of the U-shaped workbench with an embedded flange installed in the turning device for hydraulic pump motor maintenance of this application.

[0021] Figure label:

[0022] 1. Base; 2. Handwheel; 3. Reducer; 4. Pinion; 5. Gear; 6. Second bearing with mounting bracket.

[0023] 7. U-shaped worktable; 7-1. Through hole; 7-2. Weight reduction hole; 7-3. Cross-shaped kidney-shaped hole; 8. Hydraulic pump motor; 9. First bearing with seat; 10. Disc; 10-1. Positioning hole.

[0024] Handle 11, limit seat 12, locking spring seat 13, embedded flange 14, embedded flange notch 14-1. Detailed Implementation

[0025] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, the tilting device for hydraulic pump motor maintenance of this application includes:

[0028] Base 1, the base includes a base frame and two columns fixed on the base frame and arranged opposite to each other;

[0029] Two mounted bearings are respectively fixed on the two columns, and the two mounted bearings 6 are arranged opposite to each other;

[0030] The U-shaped worktable 7 has two vertical sections and the inner rings of the two bearing seats fixed by a fixed shaft, and the U-shaped worktable 7 can rotate around the fixed shaft.

[0031] The hydraulic pump motor overhaul tilting device of this application connects the two vertical sections of a U-shaped worktable to the inner rings of bearings fixed on a column, and is rigidly fixed by a fixed shaft. This allows the U-shaped worktable to rotate 360° around the center line of the fixed shaft, achieving tilting without blind spots, facilitating the overhaul and assembly of the hydraulic pump motor. When overhauling large and heavy-duty hydraulic pump motors, operators can adjust their spatial posture at any time as needed, precisely rotating the part to be inspected to a position that is easy to observe and operate.

[0032] When hoisting and fixing the hydraulic pump motor 8, the U-shaped workbench is laid flat with the opening structure of the U-shaped workbench facing upwards, which facilitates the fixing of the hydraulic pump motor.

[0033] After the hydraulic pump motor 8 is fixed on the U-shaped workbench, the posture of the hydraulic pump motor is adjusted so that the U-shaped workbench is tilted or upright. Hydraulic pump motors are usually quite long, especially multi-stage hydraulic pump motors. Due to the presence of the U-shaped workbench, the center of gravity of the U-shaped workbench and the center of gravity of the hydraulic pump motor are located on opposite sides of the column. This results in a smaller deviation of the center of gravity of the U-shaped workbench and the hydraulic pump motor as a whole from the column, making the tilting device for hydraulic pump motor maintenance of this application highly stable and minimizing the risk of tipping over.

[0034] Without a U-shaped worktable, the hydraulic pump motor is directly connected to two bearings with mounting brackets. The center of gravity of the hydraulic pump motor of the same size will shift significantly, which may easily lead to the risk of tipping over.

[0035] In addition, the base adopts an integral base structure consisting of a bottom frame and two columns, which has good rigidity and stability and can withstand the large weight of the hydraulic pump motor and the dynamic load during the flipping process.

[0036] During implementation, such as Figure 1 and Figure 2 As shown, the base frame is a rectangular base frame, and the two columns are located in the middle of the base frame.

[0037] The rectangular base frame features a regular geometric shape and excellent mechanical properties, enabling it to evenly distribute loads and effectively resist torsion and deformation. Positioning two uprights in the center of the base frame ensures that the overturning torque borne by the uprights is transferred to the central area of ​​the base frame via the shortest path, maximizing the overall rigidity of the base frame. This significantly improves the device's anti-overturning capability and structural stability when rotating under heavy loads, avoiding stress concentration and frame deformation caused by excessive cantilever length. The base provides support for the hydraulic pump motor, meeting the static strength requirements for overturning and ensuring the torque meets anti-overturning requirements.

[0038] Specifically, the base is formed by welding square tubes and sheet metal.

[0039] In practice, the two mounted bearings are fixed to the two columns by bolts.

[0040] During implementation, such as Figure 1 and Figure 2 As shown, the two columns are the first column and the second column, the bearing fixed at the first column is the first bearing 9, and the bearing fixed at the second column is the second bearing 6.

[0041] The base also includes a support column, which and the first column are fixed to the bottom frame at the front and rear.

[0042] like Figure 1 As shown, the maintenance turning device also includes

[0043] The speed reducer 3 is fixed on the support column;

[0044] The handwheel 2, used for inputting power, is connected to the input shaft of the reducer 3 by a key;

[0045] The small gear 4 is connected to the output shaft of the reducer 3 by a key;

[0046] The large gear 5 meshes with the small gear 4, and the large gear is fixed to the fixed shaft at the first bearing seat.

[0047] By installing a speed reducer on a support column and connecting a handwheel to the input shaft of the speed reducer, the operator can transmit power through the speed reducer by turning the handwheel. The speed reducer has a large transmission ratio, which can amplify the small torque applied by the operator into a large torque on the output shaft, thereby easily driving the heavy-duty hydraulic pump motor to achieve smooth rotation and significantly reducing the labor intensity of manual operation.

[0048] The power transmission route is: handwheel - reducer - pinion - gear - first bearing - worktable - second bearing.

[0049] Specifically, the input torque is amplified by the gear pair formed by the pinion and the large gear. The large gear has two gear rings, which are fixed on the disk.

[0050] Specifically, there is a spacer sleeve between the seated bearing and the U-shaped worktable to adjust the axial clearance.

[0051] In practice, the reducer is a worm gear reducer with reverse self-locking function to achieve one-time locking of the turning device;

[0052] The reducer uses a worm gear input and worm wheel output method to achieve vertical power transmission in a 90° space.

[0053] Worm gear reducers possess a natural reverse self-locking characteristic. This characteristic allows the U-shaped worktable to automatically lock in its current position after being rotated to any angle and then stopped, eliminating the need for additional mechanical locking devices. Even under conditions such as hydraulic pump motor center of gravity shift or external vibration, it will not slip or rotate due to gravity, effectively preventing accidental displacement and greatly improving safety during maintenance.

[0054] After the operator adjusts the position by turning the handwheel, releasing the handwheel automatically locks the device in place, eliminating the need for additional tightening actions (such as pins or bolts). This achieves the convenient function of "one-time operation, automatic locking." This not only simplifies the operation process and improves work efficiency but also avoids safety accidents caused by human negligence in locking, enhancing the intelligence and user-friendliness of the device.

[0055] Achieving 90° vertical power transmission and optimizing spatial layout

[0056] The worm gear reducer adopts a transmission method of horizontal worm input and vertical worm output, realizing a 90° spatial vertical transmission between the input and output shafts. This structure allows the handwheel to be arranged horizontally, conforming to ergonomic operating habits and facilitating the application of force; at the same time, it efficiently converts power from the horizontal direction to the vertical rotational output, driving the large gear to rotate the U-shaped worktable.

[0057] In practice, the turning device also includes a secondary locking device, such as... Figure 1 As shown, the secondary locking device includes:

[0058] Multiple positioning holes 10-1 are provided at the disk 10 of the large gear;

[0059] Locking spring seat 13 is fixed to the outer top surface of the first bearing with seat;

[0060] The push rod and the locking spring seat are in a sliding push-pressing engagement;

[0061] The limiting seat 12 with the limiting groove is fixed to the outer top surface of the first bearing with a seat;

[0062] Handle 11, one end of the handle has a ball head located in the limiting groove to limit the movement direction of the handle, the other end of the handle is used for operation by the operator, and the end of the handle near the ball head is also rotatably connected to the push rod;

[0063] When the handle is turned, it causes the push rod to press the spring of the locking spring seat, causing the push rod to insert into the positioning hole to achieve locking; when the handle is released, the spring and retaining ring inside the locking spring seat reset, causing the push rod to reset.

[0064] While primary locking (self-locking of worm gear reducers) can effectively prevent reverse rotation, there is still a theoretical risk of failure under long-term static load or extreme working conditions. The secondary locking device added to the hydraulic pump motor overhaul tilting device of this application achieves rigid limiting through a mechanical pin. When the handle is turned, it drives the push rod to press the spring of the locking spring seat, causing the push rod to insert into the positioning hole and lock, forming a physical lock and completely eliminating the possibility of accidental rotation of the U-shaped worktable under any circumstances.

[0065] When the handle is pulled, the push rod slides against the spring force and precisely inserts into the positioning hole, achieving locking; after releasing the handle, the spring returns to its original position, pushing the push rod out of the positioning hole and releasing the lock. The entire process requires no tools, the actions are fluid, and the feedback is clear. Operators can clearly determine the locking status through touch and sound, avoiding accidental operation.

[0066] Multiple positioning holes are evenly distributed along the circumference of the large gear, forming multiple preset flip angles (such as one station every 30° or 45°), which facilitates the quick and accurate fixing of the hydraulic pump motor at commonly used maintenance angles (such as 0°, 90°, 180°, etc.). This design not only improves maintenance efficiency but also ensures the consistency of position after each flip, which is beneficial for standardized operations and multi-process collaboration.

[0067] The number and distribution of positioning holes can be flexibly designed according to actual needs, making it suitable for flipping operations with different precision requirements.

[0068] In summary, by introducing a mechanical secondary locking device, a dual safety guarantee system of "self-locking + rigid push rod" is constructed, which further improves the safety level while retaining the advantages of the worm gear primary locking.

[0069] During implementation, such as Figure 3 As shown, the overturning device for hydraulic pump motor maintenance also includes an embedded flange 14 for fixing to the hydraulic pump motor;

[0070] The transverse portion of the U-shaped workbench has a through hole 7-1, and the embedded flange 14 is detachably installed at the through hole via bolts, bolt holes reserved in the embedded flange, and bolt holes reserved in the transverse portion of the U-shaped workbench (not shown in the figure).

[0071] The embedded flange features a modular, detachable structure, allowing for the replacement of different embedded flanges to accommodate various hydraulic pump motor models and interface specifications. This enables the same tilting device to be adapted to multiple maintenance targets (hydraulic pump motors), greatly enhancing the equipment's versatility and adaptability. Furthermore, worn or damaged flanges can be replaced individually, eliminating the need to replace the entire U-shaped worktable, thus reducing maintenance costs and downtime.

[0072] During implementation, such as Figure 2 and Figure 3 As shown, the transverse portion of the U-shaped worktable has uniformly distributed weight-reducing holes 7-2;

[0073] The transverse part of the U-shaped workbench is provided with cross-shaped kidney holes 7-3 around the through hole, and the embedded flange 14 is provided with an embedded flange notch 14-1 corresponding to the through hole;

[0074] The embedded flange is fitted with the outer diameter of the output shaft of the hydraulic pump motor, and the cross-shaped waist hole and the notch of the embedded flange are connected and fitted with the bolts for mounting the hydraulic pump motor to fix the hydraulic pump motor to the U-shaped worktable.

[0075] Multiple evenly distributed weight-reducing holes are set in the horizontal part of the U-shaped worktable, which effectively reduces the amount of material used and the overall weight while ensuring structural strength and rigidity.

[0076] The cross-shaped mounting holes are orthogonally symmetrically distributed around the through hole, forming elongated oval mounting channels in four directions. This design allows for some adjustment margin for the mounting bolts in the X and Y orthogonal directions, and is compatible with hydraulic pump motor mounting interfaces from different manufacturers and with different bolt hole distributions (such as four holes arranged diagonally or evenly around the circumference). It can adapt to various installation modes without replacing the embedded flange, greatly enhancing the versatility and field adaptability of the device.

[0077] The embedded flange notch on the embedded flange aligns with the cross-shaped notch on the U-shaped worktable during installation, forming a continuous bolt channel. After the output shaft of the hydraulic pump motor is inserted into the embedded flange for axial positioning, its fixing bolts can be directly inserted through the channel formed by the notch and the flange into the threaded hole in the pump body for tightening, without prior disassembly of the embedded flange or adjustment of its angle. This design achieves an integrated installation process of "axial positioning + radial bolt insertion," simplifying the operation steps and improving clamping efficiency.

[0078] The hydraulic pump motor overhaul device of this application can adapt to different specifications and models of hydraulic pump motors for overhaul, and can be quickly disassembled, used safely, and assembled precisely.

[0079] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0080] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0081] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0082] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0083] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0084] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A turning device for overhauling a hydraulic pump motor, characterized in that, include: The base (1) includes a base frame and two columns fixed on the base frame and arranged opposite to each other; Two bearings with mounting brackets are respectively fixed on the two columns, and the two bearings with mounting brackets are arranged opposite to each other; The U-shaped worktable (7) has two vertical parts and the inner rings of the two bearing seats fixed by a fixed shaft, and the U-shaped worktable can rotate around the fixed shaft.

2. The turning device for hydraulic pump motor maintenance according to claim 1, characterized in that, The base frame is rectangular, and the two columns are located in the middle of the base frame.

3. The turning device for hydraulic pump motor maintenance according to claim 1, characterized in that, The two columns are the first column and the second column, respectively. The bearing fixed at the first column is the first bearing (9), and the bearing fixed at the second column is the second bearing (6). The base (1) also includes a support column, which and the first column are fixed to the bottom frame at the front and rear. Overhauling the turning device also includes The speed reducer (3) is fixed on the support column; The handwheel (2) for inputting power is connected to the input shaft of the reducer by a key; The small gear (4) is connected to the output shaft of the reducer by a key; The large gear (5) meshes with the small gear, and the large gear is fixed to the fixed shaft at the first bearing seat.

4. The turning device for hydraulic pump motor maintenance according to claim 3, characterized in that, The reducer (3) adopts a worm gear reducer with reverse self-locking function to achieve one-time locking of the turning device; The reducer uses a worm gear input and worm wheel output method to achieve vertical power transmission in a 90° space.

5. The turning device for hydraulic pump motor maintenance according to claim 3, characterized in that, It also includes a secondary locking device, which comprises: Multiple positioning holes (10-1) are provided on the disk of the large gear; Locking spring seat (13) is fixed to the outer top surface of the first bearing with seat; The push rod and the locking spring seat are in a sliding push-pressing engagement; A limiting seat (12) with a limiting groove is fixed to the outer top surface of the first bearing with a seat; Handle (11), one end of the handle has a ball head located in the limiting groove to limit the movement direction of the handle, the other end of the handle is used for operation by the operator, and the end of the handle near the ball head is also rotatably connected to the push rod; When the handle is turned, it causes the push rod to press the spring of the locking spring seat, causing the push rod to insert into the positioning hole to achieve locking; when the handle is released, the spring and retaining ring inside the locking spring seat reset, causing the push rod to reset.

6. The turning device for hydraulic pump motor maintenance according to claim 5, characterized in that, It also includes an embedded flange (14) for mounting to the hydraulic pump motor; The transverse portion of the U-shaped workbench has a through hole (7-1), and the embedded flange (14) is detachably installed at the through hole (7-1) by bolts, the bolt holes reserved in the embedded flange, and the bolt holes reserved in the transverse portion of the U-shaped workbench.

7. The turning device for hydraulic pump motor maintenance according to claim 6, characterized in that, The transverse portion of the U-shaped worktable has evenly distributed weight-reducing holes (7-2); The transverse part of the U-shaped workbench is provided with a cross-shaped kidney-shaped hole (7-3) around the through hole, and the embedded flange is provided with an embedded flange notch (14-1) corresponding to the through hole; The embedded flange is fitted with the outer diameter of the output shaft of the hydraulic pump motor, and the cross-shaped waist hole (7-3) and the embedded flange notch (14-1) are connected to the bolts for mounting the hydraulic pump motor to fix the hydraulic pump motor to the U-shaped worktable.

8. The turning device for hydraulic pump motor maintenance according to claim 1, characterized in that, Two mounted bearings are fixed to the two columns by bolts.

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