A vehicle-mounted hydraulic puller

Abstract

The utility model discloses a vehicle-mounted hydraulic puller relates to mechanical dismantling tool technical field, and the device includes the frame of area walking mechanism, is equipped with hydraulic puller and support device on the frame, and the support device is located the operation side of hydraulic puller, contains lifting mechanism and is used for abutting the support seat of the shaft pole outer periphery of the workpiece to be dismantled, and lifting mechanism drives the support seat to lift the shaft pole to remove the close state of close fitting of the shaft pole dead weight and workpiece, and the automatic operation of hydraulic puller and lifting mechanism can be realized by optional control mechanism, and the positioning device can be set to the puller rod end portion and ensure the positioning with the shaft pole, the utility model can effectively reduce the dismantling resistance caused by the shaft pole dead weight, improve the dismantling efficiency and security, and adapt to different working conditions.

Description

Technical Field

[0001] This utility model relates to a disassembly tool, specifically a vehicle-mounted hydraulic puller. Background Technology

[0002] During the maintenance of large motors and other equipment, it is usually necessary to disassemble the end covers, bearings, and couplings mounted on the shafts of the large motors. To achieve the above disassembly operations, hydraulic pullers are currently commonly used to apply pulling force. However, due to the large mass of the hydraulic puller, two operators are often required to cooperate in positioning and fixing the device, and another operator is required to operate the hydraulic rod to provide driving force. This results in high operational intensity and low efficiency. If the positioning is improper or the force is uneven, the hydraulic puller is prone to slipping or tilting. In severe cases, it may not only cause equipment damage but also pose a risk to personnel safety.

[0003] To overcome the inconvenience of using traditional hydraulic pullers, Chinese patent document (authorization number CN206084325U, publication date April 12, 2017) discloses a hydraulic puller trolley. This technical solution involves installing a lifting mechanism on a walking mechanism and setting a hydraulic puller on the lifting mechanism. The lifting mechanism can change the vertical height of the hydraulic puller to adapt to the pulling operation of parts of different positions and sizes. The walking mechanism improves the mobility of the equipment, making it easier to move and position, thereby improving the convenience and safety of operation.

[0004] However, in practical applications, large motors often have heavy components such as rotors mounted on their shafts. When the large motor stops rotating, the shaft tends to sink under gravity and make contact with the lower edge of the motor end cover shaft hole. In this situation, it is difficult to effectively lift and pull out the end cover of the large motor using only the aforementioned hydraulic puller trolley, and it is easy to scratch or damage the edge of the end cover. Therefore, there are still problems with poor structural adaptability and safety risks. Therefore, it is necessary to provide a disassembly tool to address the problem of workpieces mounted on shafts being difficult to disassemble due to the shaft sinking under its own weight or eccentric fit and being tightly attached to the workpiece being pulled. Utility Model Content

[0005] This invention addresses the technical problem of difficulty in disassembling workpieces with clearance fits on shafts using existing hydraulic pullers, where the workpiece and shaft are tightly fitted due to the shaft's own weight. A vehicle-mounted hydraulic puller solution is proposed. This solution uses a support device on the working side of the hydraulic puller to lift the shaft, effectively eliminating the tight fit between the shaft and the workpiece. This structural design significantly reduces workpiece disassembly resistance, improves disassembly efficiency, solves the disassembly difficulty caused by the shaft's own weight, and enables rapid and stable disassembly of clearance-fit workpieces.

[0006] The technical solution adopted in this utility model is:

[0007] A vehicle-mounted hydraulic puller includes a frame with a walking mechanism, and the frame is equipped with a hydraulic puller and a support device.

[0008] The support device is located on the working side of the hydraulic puller and includes a lifting mechanism and a support base;

[0009] The lifting mechanism is connected to the support seat. The lifting mechanism is used to adjust the height of the support seat so that the support seat abuts against the outer periphery of the shaft on which the workpiece is installed.

[0010] Preferably, it also includes a control mechanism, which includes a hydraulic puller, a hydraulic system, and a controller;

[0011] The hydraulic system includes a hydraulic oil tank, which is connected to the hydraulic puller's oil circuit.

[0012] The controller controls the hydraulic puller's movement by controlling the flow of hydraulic oil between the hydraulic oil tank and the hydraulic puller.

[0013] Preferably, the lifting mechanism is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is mounted on the vehicle frame, and the telescopic rod of the hydraulic cylinder is connected to the support seat;

[0014] The hydraulic cylinder is connected to the hydraulic oil tank via an oil circuit. The controller controls the flow state of the hydraulic oil in the oil circuit between the hydraulic cylinder and the hydraulic oil tank, thereby controlling the movement of the hydraulic cylinder.

[0015] Preferably, the lifting mechanism is an electric cylinder, the cylinder body of which is mounted on the vehicle frame, and the telescopic rod of which is connected to the support seat;

[0016] The electric cylinder is electrically connected to the controller, which is used to control the operation of the electric cylinder.

[0017] Preferably, the free end of the hydraulic puller rod is provided with a positioning device, which cooperates with the shaft rod to position the hydraulic puller.

[0018] Preferably, the positioning device is a positioning sleeve extending axially along the puller rod, one end of the tube of the positioning sleeve is detachably connected to the free end of the puller rod, and the inner hole of the positioning sleeve is positioned in conjunction with the shaft rod.

[0019] Preferably, the vehicle frame is equipped with a lifting platform, and the hydraulic puller is installed on the working surface of the lifting platform. The lifting platform is used to adjust the working height of the hydraulic puller.

[0020] Preferably, the hydraulic puller is a three-jaw hydraulic puller.

[0021] Preferably, the support is detachably connected to the actuator of the lifting mechanism.

[0022] Preferably, the support seat is provided with a support surface, which is used to abut against the outer periphery of the shaft.

[0023] The beneficial effects of this utility model are:

[0024] 1. This utility model provides a lifting mechanism on the working side of the hydraulic puller. The lifting mechanism can effectively lift the shaft that is tightly fitted to the inner hole of the workpiece due to its own weight, thereby relieving the interference between the shaft and the workpiece being pulled. This structural design significantly reduces the initial disengagement resistance of the workpiece, avoids the phenomenon of the hydraulic puller pulling without load or abnormal force due to jamming, effectively solves the problem of disassembly difficulties caused by the gravity of the shaft, and ensures that the clearance-fit workpiece can achieve a fast, stable and safe disassembly process under controlled conditions.

[0025] 2. By setting up a hydraulic system and controller, the lifting mechanism and lever movements are automatically controlled. This automatic control method significantly reduces the degree of manual intervention and labor intensity, simplifies the operation process, improves work efficiency and on-site safety, and is suitable for long-term, high-frequency industrial application environments.

[0026] 3. By setting a positioning device at the free end of the puller rod, the puller rod can be stably positioned, thereby preventing the hydraulic puller from slipping, tilting or other abnormal states caused by eccentric force, reducing the risk of workpiece damage or equipment failure, and improving the stability of the overall system and the reliability of disassembly operations.

[0027] 4. By configuring a lifting platform on the chassis, the installation height of the hydraulic puller can be flexibly adjusted according to the actual installation position of the workpiece being disassembled. This function can not only adapt to motor end covers, bearings, couplings and other components of different sizes and installation heights, but also quickly adjust to the optimal working posture in complex working environments, significantly enhancing the adaptability and versatility of the equipment to various disassembly conditions and improving ease of use. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the positioning sleeve in this utility model.

[0031] Among them, 1-frame, 2-hydraulic puller, 3-lifting mechanism, 4-support seat, 5-controller, 6-hydraulic oil tank, 7-wheel, 8-puller rod, 9-positioning device, 10-lifting platform, 11-displacement sensor, 12-oil pump. Detailed Implementation

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0033] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0034] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0035] Example 1

[0036] See appendix Figure 1 and attached Figure 2 A vehicle-mounted hydraulic puller includes a frame 1 with a walking mechanism. In this embodiment, the frame 1 is plate-shaped. The walking mechanism can be configured as wheels 7 supported at the bottom of the frame 1, or as tracks installed on both sides of the frame 1. This application does not limit the specific structure of the walking mechanism 1. The walking mechanism can facilitate the movement of the frame 1. The frame 1 can also be equipped with push handles, handrails, and other devices to facilitate the operator to push and pull the frame 1.

[0037] The frame 1 is equipped with a hydraulic puller 2 and a support device. The hydraulic puller 2 should be mounted on a mounting seat. The mounting seat is used to ensure the stability of the hydraulic puller 2 and facilitate the installation of the hydraulic puller 2 on the frame 1. The hydraulic puller 2 can be a three-jaw hydraulic puller, or different numbers of jaws can be selected according to actual needs. The hydraulic puller 2 can be configured as a manual hydraulic puller 2 or an electric hydraulic puller 2. This application does not limit the number of jaws and the driving form of the hydraulic puller 2, and can select according to actual needs.

[0038] The support devices are spaced apart on the working side of the hydraulic puller 2. The working side of the hydraulic puller 2 should be understood as the side on which the hydraulic puller 2 applies the pulling force, specifically the extension direction of the puller rod 8 of the hydraulic puller 2.

[0039] The support device includes a lifting mechanism 3 and a support seat 4. The lifting mechanism 3 is mounted on the frame 1. The actuator of the lifting mechanism 3 is connected to the support seat 4. The lifting mechanism 3 is used to drive the support seat 4 to move, so that the support seat 4 abuts against the outer periphery of the shaft used to install the workpiece being pulled, thereby lifting or supporting the shaft, eliminating the tight fit between the shaft and the inner hole of the workpiece due to its own weight, reducing the disassembly resistance of the workpiece, and facilitating the stable pulling of the workpiece by the hydraulic puller 2.

[0040] In one specific case, the shaft on which the workpiece is mounted is the shaft of a large motor, and the workpiece being pulled is a motor end cap sleeved on the shaft. However, the workpiece being pulled and the shaft are not limited to this specific usage scenario. It should be understood as a shaft with a clearance fit in the opening of the workpiece being pulled. In all scenarios where the shaft and the opening of the workpiece are eccentric, resulting in the shaft and the opening of the workpiece being tightly fitted, making it difficult to remove the workpiece from the shaft, the shaft on which the workpiece is mounted is referred to as the shaft in this application.

[0041] The number of support devices can be flexibly configured according to actual application needs. One or more devices can be set. Regardless of the specific number of support devices, the support seat 4 of the support device can support the shaft. No matter how the specific number of support devices changes, it is within the protection scope of this utility model.

[0042] The extension direction of the support device can be flexibly configured according to actual needs. The lifting mechanism 3 can be installed vertically on the frame 1 or inclined on the frame 1, so as to adapt to special scenarios, such as the usage requirements in space-constrained scenarios, thereby improving the environmental adaptability of this application and the lifting effect of the support device on the axle.

[0043] In this embodiment, there is one support device, and the lifting mechanism 3 of the support device is vertically installed on the frame 1. The support device and the pull rod 8 of the hydraulic puller 2 are arranged on the same axis. The support device may also include a displacement sensor 11 for measuring the lifting height of the lifting mechanism 3.

[0044] The lifting mechanism 3 of the support device can be an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder, and the driving method of the lifting mechanism 3 can be electric or manual. For example, when a hydraulic cylinder is used as the lifting mechanism 3, a jack that can be manually controlled for lifting can be set. The specific control method can be selected according to the actual application scenario. This application does not limit the specific selection of the lifting mechanism 3.

[0045] The support 4 is provided with a support surface, which is used to abut against the outer periphery of the shaft. In order to enhance the abutment effect of the support surface, the shape of the support surface can be selected according to the different shapes of the shaft, so that the support surface can fit the shaft. For example, if the shaft is a circular shaft of a motor, the support surface should be set as an arc-shaped surface that matches the circular shaft of the motor. If the shaft is a spline rod, the support surface can be set as a polygonal or composite curved surface structure that matches the profile of the spline rod. The shape of the support surface can be selected according to the different shapes of the shaft, so as to fit the shaft more tightly and prevent the shaft from rotating or slipping during the lifting process.

[0046] Furthermore, to improve the adaptability to different types of shafts, the support 4 can also be configured as a replaceable structure. Specifically, the support surface can be connected to the main body of the support 4 by means of screwing, snap-fit, or sliding fit, so as to quickly replace the matching support surface assembly according to different working conditions, thereby enhancing the versatility and adaptability of this utility model. The support surface can also be provided with a flexible buffer layer, which is made of rubber, polyurethane, or other high-molecular elastic materials, and can effectively absorb vibration and reduce local pressure on the shaft surface during the support process.

[0047] Example 2

[0048] Based on the above embodiment 1, in order to facilitate operation, the hydraulic puller 2 is set to automatic control mode. Therefore, the vehicle-mounted hydraulic puller also includes a control mechanism.

[0049] The control mechanism includes a hydraulic system and a controller 5; the hydraulic system includes a hydraulic oil tank 6, which is connected to the hydraulic puller 2 via an oil circuit; the oil circuit connecting the hydraulic oil tank 6 and the hydraulic puller 2 should be equipped with an oil pump 12 and other oil circuit devices. The controller 5 controls the operating status of the oil pump 12 and other oil circuit devices in the connecting oil circuit, thereby controlling the flow state of hydraulic oil between the hydraulic oil tank 6 and the hydraulic puller 2, and thus controlling the movement of the hydraulic puller 2; this technical solution of electrically controlling the movement of the hydraulic puller 2 through the controller 5 is a common technical solution in the field of vehicle-mounted hydraulic pullers, and the specific structure will not be described here.

[0050] Example 3

[0051] Based on the above embodiment 2, in order to enable the lifting mechanism 3 to be electrically controlled, this embodiment provides two technical solutions: setting the lifting mechanism as a hydraulic cylinder or an electric cylinder.

[0052] The lifting mechanism 3 is configured as a hydraulic cylinder, the cylinder body of which is mounted on the frame 1, and the telescopic rod of which is connected to the support 4.

[0053] The hydraulic cylinder is connected to the hydraulic oil tank 6 by an oil circuit. The oil circuit connecting the hydraulic cylinder and the hydraulic oil tank 6 should be equipped with an oil pump 12 and other oil circuit devices. The controller 5 controls the operating status of the oil pump 12 and other oil circuit devices, thereby controlling the hydraulic oil flow status between the hydraulic cylinder and the hydraulic oil tank 6, and thus controlling the action of the hydraulic cylinder. The oil pump 12 and other oil circuit devices control the hydraulic cylinder to work.

[0054] In this application, the hydraulic cylinder and the hydraulic grappling hook 2 share the same hydraulic oil tank 6 and the same oil pump 12. The hydraulic oil tank 6 and the oil pump 12 are connected by oil circuits. The oil pump 12 is connected to the hydraulic cylinder and the hydraulic grappling hook 2 by oil circuit valve block. The oil circuit valve block is electrically connected to the controller 5. The controller 5 controls the working state of the oil pump 12 and the opening and closing state of the oil circuit in the oil circuit valve block, thereby realizing the control of the operation of the hydraulic cylinder and the hydraulic grappling hook 2 by the same hydraulic oil tank 6 and the same oil pump 12.

[0055] Alternatively, the lifting mechanism 3 can be configured as an electric cylinder, with the cylinder body mounted on the frame 1 and the telescopic rod of the electric cylinder connected to the support 4; the electric cylinder is electrically connected to the controller 5, so that the controller 5 can control the action of the electric cylinder in addition to controlling the action of the hydraulic puller 2.

[0056] Example 4

[0057] Based on the above embodiment 1, in order to accurately position the pull rod 8 of the hydraulic puller 2 on the shaft on which the workpiece is installed, a positioning device 9 is detachably or fixedly connected to the free end of the pull rod 8 of the hydraulic puller 2. The positioning device 9 cooperates with the shaft to position the pull rod 8 of the hydraulic puller 2. During the process of the hydraulic puller 2 pulling the workpiece, the force on the shaft is more even, thereby preventing the hydraulic puller 2 from deviating or slipping during the application of force. The positioning device 9 can be a number of axial protrusions set on the circumference of the shaft, or it can be a positioning sleeve or positioning sleeve, etc. The specific structure of the positioning device 9 is not limited here. It can achieve effective positioning of the pull rod 8 of the hydraulic puller 2, ensure the relative position between the hydraulic puller 2 and the shaft is stable, and prevent the pull rod 8 from deviating, tilting or slipping during the application of force.

[0058] For details, please see the appendix. Figure 2 The positioning device 9 is a positioning sleeve that extends axially along the pull rod 8. The fixed end of the tube of the positioning sleeve is welded to the free end of the pull rod 8. The inner diameter of the positioning sleeve is larger than the diameter of the shaft, so that the shaft can be sleeved in the inner hole of the positioning sleeve, thereby realizing the coaxial positioning of the shaft and the pull rod 8.

[0059] The cross-sectional shape of the inner hole of the positioning sleeve can be designed and adjusted according to the specific structure of the shaft. If the shaft is a spline shaft, the cross-sectional shape of the inner hole of the positioning sleeve can be designed to match the spline contour to achieve precise positioning in the axial and rotational directions. If the shaft is a cylindrical structure, the inner hole of the positioning sleeve can adopt a circular cross-section, and a suitable fitting clearance can be set as needed to ensure that the shaft can be smoothly inserted and remain coaxially stable. If the shaft is another irregular structure, the cross-sectional shape of the inner hole can also be set as a corresponding polygon, ellipse or customized irregular cross-section according to its shape characteristics, thereby improving the positioning accuracy and connection stability.

[0060] Example 5

[0061] Based on the above embodiment 1, the frame 1 is provided with a lifting platform 10, and the hydraulic puller 2 is installed on the working surface of the lifting platform 10. The lifting platform 10 is used to adjust the working height of the hydraulic puller 2. By setting the lifting platform 10 on the frame 1, the vertical position of the hydraulic puller 2 can be flexibly adjusted according to the installation height of the shaft or the workpiece being pulled under different disassembly conditions, thereby achieving coaxial alignment between the hydraulic puller 2 and the shaft, ensuring that the pulling force is applied evenly along the axial direction, avoiding problems such as uneven load, uneven force, or positioning deviation caused by height mismatch, and further improving the stability and adaptability of the disassembly operation.

[0062] Working principle:

[0063] In the application scenario of removing the motor end cover from the shaft of a large motor, the vehicle-mounted hydraulic puller described in this application is moved to the motor to be disassembled. The operator adjusts the height of the lifting platform 10 according to the position of the motor shaft so that the hydraulic puller 2 and the motor shaft are coaxial. At the same time, the lifting mechanism 3 is operated to raise the support seat 4 so that the support seat 4 is supported under the motor shaft and the motor shaft is lifted, thereby reducing the clamping force exerted by the motor shaft on the motor end cover and reducing the tightness of the connection between the end cover and the shaft.

[0064] Subsequently, the positioning device 9 is fitted onto the end of the motor shaft, so that the puller rod 8 can be accurately aligned with the axis of the shaft, avoiding deviation or uneven force during the application of force by the hydraulic puller 2; after positioning, the hydraulic puller 2 is operated, and under the action of hydraulic drive, the puller rod 8 is smoothly advanced along the axis, applying a pull-out force to the motor end cover, so that it can be smoothly detached from the shaft.

[0065] It is worth mentioning that the application scenarios of the working principle described above are only typical usage examples of this application and do not constitute a limitation on the scope of application of this application. The vehicle-mounted hydraulic puller described in this application is not only suitable for disassembling the end cover on the shaft of a large motor, but can also be widely used for disassembling various workpieces that need to be pulled out along the axial direction.

[0066] The above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described herein can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vehicle-mounted hydraulic puller, characterized in that: It includes a frame (1) with a walking mechanism, and the frame (1) is equipped with a hydraulic puller (2) and a support device; The support device is located on the working side of the hydraulic puller (2) and includes a lifting mechanism (3) and a support seat (4). The actuator of the lifting mechanism (3) is connected to the support (4). The lifting mechanism (3) is used to adjust the height of the support (4) so ​​that the support (4) abuts against the outer periphery of the shaft on which the workpiece is installed.

2. The vehicle-mounted hydraulic puller as described in claim 1, characterized in that: It also includes a control mechanism, which includes a hydraulic puller, a hydraulic system and a controller (5); The hydraulic system includes a hydraulic oil tank (6), which is connected to the hydraulic puller (2) via an oil circuit; The controller (5) controls the hydraulic puller (2) by controlling the flow state of hydraulic oil between the hydraulic oil tank (6) and the hydraulic puller (2).

3. The vehicle-mounted hydraulic puller as described in claim 2, characterized in that: The lifting mechanism (3) is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is installed on the frame (1), and the telescopic rod of the hydraulic cylinder is connected to the support seat (4). The hydraulic cylinder is connected to the hydraulic oil tank through an oil circuit. The controller (5) controls the flow state of the hydraulic oil in the oil circuit between the hydraulic cylinder and the hydraulic oil tank (6), thereby controlling the action of the hydraulic cylinder.

4. The vehicle-mounted hydraulic puller as described in claim 2, characterized in that: The lifting mechanism (3) is an electric cylinder, the cylinder body of which is mounted on the frame (1), and the telescopic rod of which is connected to the support seat (4); The electric cylinder is electrically connected to the controller (5), and the controller (5) is used to control the action of the electric cylinder.

5. The vehicle-mounted hydraulic puller as described in claim 1, characterized in that: The hydraulic puller (2) has a positioning device (9) at the free end of the puller rod (8). The positioning device (9) cooperates with the shaft to position the hydraulic puller (2).

6. The vehicle-mounted hydraulic puller as described in claim 5, characterized in that: The positioning device (9) is a positioning sleeve that extends axially along the pull rod (8). One end of the tube of the positioning sleeve is detachably connected to the free end of the pull rod (8), and the inner hole of the positioning sleeve is positioned in conjunction with the shaft.

7. The vehicle-mounted hydraulic puller as described in claim 1, characterized in that: The frame (1) is provided with a lifting platform (10), and the hydraulic puller (2) is installed on the working surface of the lifting platform (10). The lifting platform (10) is used to adjust the working height of the hydraulic puller (2).

8. The vehicle-mounted hydraulic puller as described in claim 1, characterized in that: The hydraulic puller (2) is a three-jaw hydraulic puller.

9. The vehicle-mounted hydraulic puller as described in claim 1, characterized in that: The support (4) is detachably connected to the actuator of the lifting mechanism (3).

10. The vehicle-mounted hydraulic puller as described in claim 1, characterized in that: The support seat (4) is provided with a support surface, which is used to abut against the outer periphery of the shaft.

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