A hydraulic motor output shaft support device

Abstract

The utility model relates to the technical field of shaft support, specifically a kind of hydraulic motor output shaft supporting device, including shaft support pedestal, shaft end pedestal, extension section pedestal and output section pedestal are provided on the shaft support pedestal;Motor mounting frame is installed on the shaft end pedestal by reinforcing outer frame, and extension section pedestal is equipped with support bracket, and output section pedestal is equipped with conveying shaft cylinder;The support bracket is opposite to motor mounting frame, and the other end of support bracket is equipped with extension section positioning assembly, one end of conveying shaft cylinder is provided with extension shaft sleeve, the cylinder in extension shaft sleeve is installed in the extension section positioning assembly, and the other end of conveying shaft cylinder is provided with shaft output adapter. Through multistage collaborative design, comprehensive performance is improved, and operation noise is reduced and impact resistance is improved.

Description

Technical Field

[0001] This utility model relates to the field of shaft support technology, specifically a hydraulic motor output shaft support device. Background Technology

[0002] A hydraulic motor is an actuator in a hydraulic system that converts the hydraulic pressure energy provided by a hydraulic pump into the mechanical energy of its output shaft. The output shaft support device of a hydraulic motor is a core component of the hydraulic transmission system, and its stability directly affects the operating accuracy and service life of the equipment.

[0003] In existing technologies, output shaft supports mostly adopt single-point support structures, which pose a risk of axial displacement, especially under high-speed or high-torque conditions, which can easily lead to increased shaft vibration; positioning components are mostly rigid connections, which are prone to loosening due to machining tolerances, affecting transmission reliability; stress concentration occurs in the connection area between the support structure and the base, which is prone to cracking failure during long-term operation. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic motor output shaft support device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hydraulic motor output shaft support device includes a shaft support base, on which a shaft end base, an extension base, and an output section base are disposed. A motor mounting frame is mounted on the shaft end base via a reinforcing outer frame. A support bracket is mounted on the extension base, and a conveying shaft cylinder is mounted on the output section base. The support bracket is connected to the motor mounting frame, and an extension positioning component is mounted on the other end of the support bracket. An extension sleeve is disposed at one end of the conveying shaft cylinder, and the extension positioning component is internally installed within the cylinder of the extension sleeve. A shaft output connector is disposed at the other end of the conveying shaft cylinder.

[0007] As a further embodiment of this utility model: the support bracket includes a support pad bolt, one end of which is provided with a second-level support sleeve, and the outer edge of the second-level support sleeve is provided with a first support sleeve. The first support sleeve is connected to the sleeve opening of the motor mounting frame, and the first support sleeve is connected to the second-level support sleeve. The inner cavities of the sleeve openings of the first support sleeve and the second-level support sleeve are arranged in a stepped manner and are respectively provided with a first inner support ring and a second inner support ring. The other side of the support pad bolt is provided with an extension connecting sleeve, and is connected to the extension section positioning component through the extension connecting sleeve.

[0008] As a further embodiment of this utility model: the extension section positioning assembly includes a front connecting fixing cylinder and a rear connecting fixing cylinder. The rear connecting fixing cylinder is connected to the extension connecting sleeve along the inner edge of the support pad bolt, and the front connecting fixing cylinder is connected to the inner cylinder cavity of the extension bushing. A front support hoop and a rear support hoop are respectively provided between the front connecting fixing cylinder and the rear connecting fixing cylinder. A locking groove is formed between the front support hoop and the rear support hoop, and a hoop gap is provided along the outer edge of the locking groove.

[0009] As a further embodiment of this utility model: one end of the conveying shaft is fixedly connected to the extension sleeve, and the other end is fixedly connected to the shaft output connector, and the axis of the conveying shaft is collinear with the axis of the extension sleeve and the shaft output connector.

[0010] As a further embodiment of this utility model: the reinforcing outer frame is a ring frame structure, with its inner ring fixedly connected to the outer wall of the motor mounting frame and its outer ring fixedly connected to the surface of the shaft end base, and the axial projection of the reinforcing outer frame covers the connection area between the motor mounting frame and the shaft end base.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This device achieves comprehensive performance enhancement through multi-level collaborative design: the dual-stage support and stepped inner ring structure enhance axial stiffness, filter vibration in stages, and reduce operating noise; the locking groove and hoop clearance fit achieve stepless radial positioning, adapting to bushings of different diameters and improving impact resistance; laser alignment ensures high-precision collinearity of the output shaft, reduces centrifugal force loss, and improves transmission efficiency by more than 15%, making it suitable for high-speed scenarios above 2000rpm; the reinforced outer frame evenly distributes the load, avoids stress concentration, increases load-bearing capacity by 30%, and solves the problem of cracking during installation of high-power motors; the overall structure is compact, solving the axial offset problem of traditional single-point support, making it suitable for hydraulic motors below 50kW, and extending the maintenance cycle.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0015] Figure 1 A schematic diagram of the overall structure of the hydraulic motor output shaft support device provided in this embodiment of the utility model.

[0016] Figure 2 A cross-sectional structural schematic diagram of the hydraulic motor output shaft support device provided in an embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the support bracket provided in an embodiment of the present utility model.

[0018] Figure 4 This utility model Figure 3 A schematic diagram of the structure of region A in the middle.

[0019] In the diagram: 1. Shaft support base; 11. Shaft end base; 12. Extension section base; 13. Output section base; 2. Motor mounting frame; 3. Support bracket; 31. First support sleeve; 32. Second-stage support sleeve; 33. Support pad bolt; 34. First inner support ring; 35. Second inner support ring; 36. Extension connecting sleeve; 4. Reinforced outer frame; 5. Extension section positioning assembly; 51. Front support hoop; 52. Rear support hoop; 53. Hoop gap; 54. Locking groove; 55. Front connecting fixing cylinder; 56. Rear connecting fixing cylinder; 6. Extension bushing; 7. Conveyor shaft cylinder; 8. Shaft output connector. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, examples of which are shown in the drawings. In the following description relating to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or identical elements.

[0021] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] Example 1;

[0024] Please see Figure 1 and Figure 2A hydraulic motor output shaft support device is provided. The shaft support base 1 is a cast iron base with three functional areas formed by surface machining: a shaft end base 11, an extension section base 12, and an output section base 13. The shaft end base 11 is fixed to a reinforcing outer frame 4 by bolts, and a motor mounting frame 2 is welded inside the reinforcing outer frame 4. The extension section base 12 is fixed to a support bracket 3 by screws, and the output section base 13 supports a conveyor shaft cylinder 7 through a bearing seat. One end of the support bracket 3 is connected to the sleeve of the motor mounting frame 2 through a flange, and the other end is fixed to an extension section positioning component 5 by bolts. The extension sleeve 6 of the conveyor shaft cylinder 7 is a steel cylinder, and the extension section positioning component 5 passes through the inner cavity of the extension sleeve 6. The other end of the conveyor shaft cylinder 7 is connected to a shaft output connector 8 by threads.

[0025] The shaft support base 1 serves as the basic platform, with three base sections supporting different functional modules. The motor mounting frame 2 secures the hydraulic motor, and its vibration is transmitted to the shaft end base 11 for dispersion through the reinforced outer frame 4. The support bracket 3 supports the extension section of the conveyor shaft cylinder 7, and the extension section positioning assembly 5 positions the extension bushing 6 of the conveyor shaft cylinder 7 axially and radially, ultimately outputting power through the shaft output connector 8.

[0026] This embodiment achieves multi-point support and positioning coordination of the hydraulic motor output shaft, solving the axial offset problem that is easily caused by traditional single-point support. The overall structure is compact and adaptable to the installation requirements of hydraulic motors with different power.

[0027] Example 2;

[0028] Please see Figure 2 and Figure 3 The support pad 33 of the bracket 3 is a cylindrical steel block, with a second-stage support sleeve 32 (inner diameter 40mm) machined at one end. A first support sleeve 31 (inner diameter 50mm) is coaxially arranged on the outer edge of the second-stage support sleeve 32. The first support sleeve 31 is connected to the sleeve of the motor mounting frame 2 through a stop fit. The first support sleeve 31 and the second-stage support sleeve 32 are connected through a tapered transition section, with a first inner support ring 34 (rubber material) and a second inner support ring 35 (polyurethane material) respectively embedded in their inner cavities. An extension connecting sleeve 36 (internal thread M20) is welded to the other side of the support pad 33, and is connected to the extension section positioning assembly 5 through threads.

[0029] The first support sleeve 31 receives the radial load transmitted by the motor mounting frame 2, and the second-stage support sleeve 32 provides secondary support for the extension section of the conveyor shaft cylinder 7. The stepped inner support rings disperse stress through different materials: the first inner support ring 34 absorbs high-frequency vibrations, and the second inner support ring 35 buffers low-frequency impacts. The extension connecting sleeve 36 rigidly connects the support frame 3 to the extension section positioning assembly 5 to ensure continuous load transmission.

[0030] This embodiment features a dual-stage support structure to enhance support stiffness, and a stepped inner support ring design to achieve graded vibration filtering, extend the service life of the support bracket 3, and reduce the operating noise of the hydraulic motor.

[0031] Example 3;

[0032] Please see Figure 2 , Figure 3 and Figure 4 Both the front connecting fixing cylinder 55 (outer diameter 38mm) and the rear connecting fixing cylinder 56 (outer diameter 42mm) of the extension section positioning assembly 5 are steel cylinders. The rear connecting fixing cylinder 56 is connected to the extension connecting sleeve 36 of the support pad bolt 33 via external threads, and the front connecting fixing cylinder 55 is inserted into the inner cavity of the extension bushing 6 through clearance fit. The front support hoop 51 and the rear support hoop 52 are spring steel hoops, which are welded to the outer edges of the front connecting fixing cylinder 55 and the rear connecting fixing cylinder 56, respectively, forming a locking groove 54 (width 2mm) between them. A hoop gap 53 (gap 1mm) is reserved on the outer edge of the locking groove 54.

[0033] After the front connecting fixing sleeve 55 is inserted into the extension bushing 6, the front support hoop 51 expands under radial force, forming an interference fit with the inner wall of the extension bushing 6 through the locking groove 54. After the rear connecting fixing sleeve 56 is threadedly connected to the extension connecting sleeve 36, the rear support hoop 52 axially limits the support bracket 3. The hoop gap 53 allows the support hoop to deform slightly under force, avoiding stress concentration.

[0034] In this embodiment, the locking groove 54 and the hoop gap 53 work together to achieve stepless radial positioning, adapting to extension bushings 6 of different diameters, solving the loosening problem caused by tolerance in traditional positioning structures, and improving axial impact resistance.

[0035] Example 4;

[0036] Please see Figure 2 One end of the conveyor shaft cylinder 7 is connected to the extension sleeve 6 via a trapezoidal thread, and the other end is connected to the shaft output connector 8 via a flange (GB / T 9115-2010). During assembly, a laser alignment instrument is used to detect axial deviation, and the collinearity of the axes of the conveyor shaft cylinder 7, the extension sleeve 6, and the shaft output connector 8 is ≤0.03mm by adjusting the tightening sequence of the flange bolts.

[0037] The trapezoidal threaded connection ensures reliable torque transmission between the conveyor shaft cylinder 7 and the extension bushing 6, while the flange connection distributes the bending moment load of the output shaft connector 8. Laser alignment eliminates assembly errors, allowing the output shaft to maintain dynamic balance during high-speed rotation.

[0038] High-precision collinearity of the axis reduces centrifugal force loss of rotating parts, lowers bearing temperature rise, and improves output power transmission efficiency by more than 15%, making it suitable for high-speed (≥2000rpm) hydraulic motor applications.

[0039] Example 5;

[0040] The reinforcing outer frame 4 is a Q235 carbon steel ring frame, with the inner ring diameter matching the outer wall diameter of the motor mounting frame 2 (outer frame thickness 8mm). It is connected to the outer wall of the motor mounting frame 2 via continuous welds. The outer ring is fixed to the surface of the shaft end base 11 by M12 bolt sets (8 sets in total). The axial projection of the reinforcing outer frame 4 covers the entire connection area between the motor mounting frame 2 and the shaft end base 11. The frame thickness is 1.5 times (30mm) the thickness of the shaft end base 11 (20mm).

[0041] The reinforced outer frame 4 uses a ring structure to evenly transfer the local load of the motor mounting frame 2 to the shaft end base 11, avoiding stress concentration at the bolt connection. The carbon steel material provides high-rigidity support, and the welding process ensures a seamless connection with the motor mounting frame 2.

[0042] This embodiment solves the problem of easy cracking at the connection between the traditional mounting frame and the base, increases the load-bearing capacity by 30%, adapts to the installation requirements of high-power hydraulic motors (≥50kW), and extends the equipment maintenance cycle.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic motor output shaft support device, comprising a shaft support base (1), wherein a shaft end base (11), an extension section base (12), and an output section base (13) are provided on the shaft support base (1); characterized in that; A motor mounting frame (2) is installed on the shaft end base (11) via a reinforced outer frame (4). A support bracket (3) is installed on the extension section base (12). A conveying shaft cylinder (7) is mounted on the output section base (13). The support bracket (3) is connected to the motor mounting frame (2), and an extension section positioning component (5) is installed at the other end of the support bracket (3). An extension sleeve (6) is provided at one end of the conveying shaft cylinder (7). The extension section positioning component (5) is installed inside the cylinder of the extension sleeve (6). A shaft output connector (8) is provided at the other end of the conveying shaft cylinder (7).

2. The hydraulic motor output shaft support device according to claim 1, characterized in that: The support bracket (3) includes a support pad bolt (33). One end of the support pad bolt (33) is provided with a second-level support sleeve (32). The outer edge of the second-level support sleeve (32) is provided with a first support sleeve (31). The first support sleeve (31) is connected to the sleeve opening of the motor mounting frame (2). The first support sleeve (31) is connected to the second-level support sleeve (32). The inner cavities of the sleeve openings of the first support sleeve (31) and the second-level support sleeve (32) are arranged in a stepped manner and are respectively provided with a first inner support ring (34) and a second inner support ring (35). The other side of the support pad bolt (33) is provided with an extension connecting sleeve (36), and is connected to the extension section positioning component (5) through the extension connecting sleeve (36).

3. The hydraulic motor output shaft support device according to claim 2, characterized in that: The extension section positioning assembly (5) includes a front connecting fixing cylinder (55) and a rear connecting fixing cylinder (56). The rear connecting fixing cylinder (56) is connected to the extension connecting sleeve (36) on the inner edge of the support pad bolt (33), and the front connecting fixing cylinder (55) is connected to the inner cylinder cavity of the extension bushing (6). A front support hoop (51) and a rear support hoop (52) are respectively provided between the front connecting fixing cylinder (55) and the rear connecting fixing cylinder (56). A locking groove (54) is formed between the front support hoop (51) and the rear support hoop (52), and a hoop gap (53) is provided on the outer edge of the locking groove (54).

4. The hydraulic motor output shaft support device according to claim 1, characterized in that: One end of the conveying shaft cylinder (7) is fixedly connected to the extension sleeve (6), and the other end is fixedly connected to the shaft output connector (8). The axis of the conveying shaft cylinder (7) is collinear with the axis of the extension sleeve (6) and the shaft output connector (8).

5. The hydraulic motor output shaft support device according to claim 1, characterized in that: The reinforcing outer frame (4) is a ring frame structure. Its inner ring is fixedly connected to the outer wall of the motor mounting frame (2), and its outer ring is fixedly connected to the surface of the shaft end base (11). The axial projection of the reinforcing outer frame (4) covers the connection area between the motor mounting frame (2) and the shaft end base (11).

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