A shaft assembly lifting device

Abstract

This utility model discloses a shaft assembly lifting device to overcome the shortcomings of existing technologies in terms of assembly efficiency and labor intensity of main tapered shaft assemblies. The device includes a body, to which a lifting mechanism and a clamping assembly are connected. The lifting mechanism includes a drive assembly, a movable pulley, and a traction component. The drive assembly drives the movable pulley to move by extending and retracting the traction component. The clamping assembly is located inside the body, which has a space for longitudinal displacement of the clamping assembly. The movable pulley is connected to the clamping assembly. This structure replaces manual handling with mechanized lifting, reduces operational intensity by utilizing the labor-saving principle of the movable pulley, and ensures lifting stability through the guide displacement space, thereby significantly improving assembly efficiency and reducing labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly, specifically to a shaft assembly lifting device. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the technological maturity of new energy hybrid transmissions is increasing, and their market penetration rate is continuously rising. In the technological evolution of new energy hybrid transmissions, to meet core requirements such as power performance, fuel economy, and reliability, their product structure design is constantly being innovated. This new product structure inevitably leads to new assembly process requirements, and also brings new assembly technology challenges. The assembly process of the auxiliary transmission main cone shaft assembly is one such typical technical challenge.

[0003] Specifically, for the main cone shaft assembly of the auxiliary gearbox in new energy hybrid transmissions, due to the large structural dimensions of its core component, the bevel gear, and the constraints imposed by the internal spatial structure of the transmission housing and the assembly interference of components, the shaft components and their associated gears, bearings, and other parts in the main cone shaft assembly cannot be effectively assembled from the non-opening direction of the transmission. Based on these structural limitations, the existing assembly solution requires placing the transmission with the open end facing downwards, then pushing the main cone shaft assembly upwards into the transmission housing cavity from the open end below the transmission. A retaining circlip is then fitted to the other end of the main cone shaft assembly to prevent it from detaching from the housing cavity through axial restraint, thus completing the assembly operation.

[0004] However, the existing assembly scheme has significant drawbacks: the main cone shaft assembly is quite heavy and requires two operators to work together to move and assemble it. This not only results in extremely low assembly efficiency, making it difficult to meet the cycle time requirements of large-scale production, but also significantly increases the labor intensity of the operators, posing ergonomic risks and potential for fluctuations in assembly consistency. Utility Model Content

[0005] The purpose of this utility model is to provide a shaft assembly lifting device to overcome the shortcomings of the existing technology in terms of assembly efficiency and labor intensity of main tapered shaft assembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A shaft assembly lifting device includes a body, and the body is connected to a clamping assembly and a lifting mechanism. The lifting mechanism includes a drive assembly, a movable pulley, and a traction component. The drive assembly drives the movable pulley to move by extending and retracting the traction component. The clamping assembly is located inside the machine body, which has space for the clamping assembly to move longitudinally, and the movable pulley is connected to the clamping assembly.

[0007] It also includes a safety locking mechanism, which consists of a ratchet and a pawl that cooperate with each other and are located on the upper part of the machine body. The ratchet is coaxially arranged with the output shaft of the drive component.

[0008] It also includes a guide mechanism located inside the body, the guide mechanism including at least one guide post fixed to the body, and a clamping assembly sleeved on the guide post and slidable along it.

[0009] A buffer mechanism is provided between the clamping assembly and the machine body. The buffer mechanism is an elastic component sleeved on the guide post.

[0010] Two guide columns are provided, arranged in parallel on both sides of the machine body, and the clamping assembly is engaged with the guide columns through linear bearings.

[0011] The drive assembly is installed on the upper part of the machine body and includes a handwheel, a reducer and a winding reel. The handwheel drives the winding reel to rotate through the reducer, and the traction component is a steel wire rope mounted on the winding reel.

[0012] There are two movable pulleys, which are connected in series by steel wire ropes to form a movable pulley block structure.

[0013] The fixture assembly includes a fixture base plate and a fixture assembly detachably mounted on the fixture base plate.

[0014] The bottom of the machine is equipped with several casters, at least one of which has a locking function.

[0015] One end of the traction component is fixed to the machine body, and the other end is connected to the drive component after passing over the movable pulley.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: This invention provides a shaft assembly lifting device. By setting up a lifting mechanism including a drive component, a movable pulley, and a traction component, a mechanized lifting system is constructed. This device utilizes the drive component to move the traction component, thereby driving the movable pulley to provide stable mechanical power for lifting heavy objects. This replaces the traditional operation mode that relies on manual labor, fundamentally reducing the physical burden on the operator. The clamping assembly is located inside the machine body and can generate controlled longitudinal displacement within its internal space. This structure constrains the lifting process of the workpiece to a defined path, achieving guidance and positioning during the lifting process. This effectively avoids manual support and repeated adjustments, thus significantly improving the continuity and efficiency of the assembly operation. In summary, this technical solution, through mechanized lifting and guided displacement, effectively overcomes the shortcomings of low efficiency and high labor intensity in existing technologies for main tapered shaft assembly. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a shaft assembly lifting device according to an embodiment of the present utility model.

[0018] Figure 2 This is an isometric drawing of a shaft assembly lifting device according to an embodiment of the present utility model.

[0019] In the diagram, 1. Moving pulley; 2. Compression spring; 3. Fixture base plate; 4. Fixture assembly; 5. Machine body; 6. Wire rope; 7. Guide column; 8. Caster; 9. Handwheel; 10. Reducer; 11. Winding reel; 12. Pawl; 13. Ratchet. Detailed Implementation

[0020] With the rapid development of the new energy vehicle industry, hybrid transmissions, as key components, are becoming increasingly complex in structure, placing higher demands on assembly processes. The assembly of the auxiliary transmission's main cone shaft assembly is a typical challenge: due to the large size of the bevel gear, this assembly cannot be installed from the side of the transmission; it can only be pushed in from the bottom up with the opening facing downwards, and secured with a snap ring at the other end. Currently, domestic manufacturers in this field mainly rely on manual operation, typically requiring two workers to collaboratively move and position the main cone shaft assembly, resulting in low assembly efficiency, high labor intensity for workers, and potential safety risks. Existing technology lacks dedicated lifting equipment, and general-purpose tools are insufficient to meet the demands of efficient and precise assembly, hindering improvements in production cycle time and product quality.

[0021] Based on the above background, this utility model proposes a shaft assembly lifting device. By setting up a lifting mechanism including a drive component, a movable pulley, and a traction component, it replaces manual handling with mechanized traction, directly reducing the operating force required to lift the workpiece. The clamping assembly generates controlled longitudinal displacement within the machine body, realizing the guidance and positioning of the workpiece during the lifting process, avoiding manual adjustment and support, thus effectively overcoming the shortcomings of low assembly efficiency and high labor intensity of existing technologies.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 component 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.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0026] Reference Figure 1 As shown, this is a specific embodiment of the shaft assembly lifting device provided by the present invention, which includes a body 5, and the body 5 is connected to a clamping assembly and a lifting mechanism. The lifting mechanism includes a drive assembly, a movable pulley 1, and a traction component. The drive assembly drives the movable pulley 1 to move by extending and retracting the traction component. The clamping assembly is located inside the machine body 5, and the machine body 5 has space for the clamping assembly to generate longitudinal displacement. The movable pulley 1 is connected to the clamping assembly.

[0027] In this specific embodiment, the body 5 provides stable structural support and installation foundation for the entire device. The lifting mechanism constitutes the core power transmission system of the device. The drive component, as the power source, transmits power to the movable pulley 1 through the traction component. The movable pulley 1 changes the direction of force application and saves effort, allowing heavier workpieces to be lifted with a smaller force input through the drive component. The clamping assembly is housed inside the body 5. The longitudinal displacement space reserved inside the body 5 provides a constrained and directional movement channel for the clamping assembly and the workpiece it carries. This structure ensures the straightness and stability of the lifting process and effectively prevents the workpiece from swaying or deviating during lifting. The direct connection between the movable pulley 1 and the clamping assembly ensures that the lifting power can be applied to the clamping assembly efficiently and directly. The drive component, traction component, movable pulley 1, and clamping assembly work together to realize a complete mechanized lifting scheme. This scheme frees manual labor from heavy handling and positioning work, ensures operational accuracy through mechanical guidance, and thus achieves the beneficial effects of reducing labor intensity and improving assembly efficiency overall.

[0028] In another specific embodiment provided by this utility model, refer to Figure 1 and Figure 2 As shown, the specific structure of the shaft assembly lifting device is as follows: The body 5 is a frame structure, which is assembled by overlapping aluminum alloy profiles. Its core function is to provide a stable installation benchmark and support foundation for each functional component of the device. In order to realize the convenient movement and fixed positioning of the device, several casters 8 are provided at the bottom of the body 5, and at least one of the casters 8 is equipped with a locking mechanism. The locking action of the locking mechanism can limit the rotation of the caster 8, thereby realizing the reliable positioning of the device in the working position and meeting the movement needs of different assembly stations.

[0029] The lifting mechanism, which works in conjunction with the body 5 to achieve the lifting function, consists of three parts: a drive assembly, a movable pulley system, and a traction component. The drive assembly is installed in the upper region of the body 5 and includes... Figure 2The handwheel 9, reducer 10, and reel 11 shown are described. The handwheel 9 serves as a power input component, transmitting the operator's rotational force to the reducer 10 via a transmission connection to the input end of the reducer 10. After the reducer 10 reduces the speed and increases the torque, it drives the reel 11, connected to its output end, to rotate around its own axis. The traction component is a steel wire rope 6, the middle section of which is wound around the groove of the reel 11, and the rope is wound and unwound as the reel 11 rotates. The movable pulley system includes two movable pulleys 1, which are connected in series by the steel wire rope 6 to form a movable pulley system. Specifically, one end of the steel wire rope 6 is fixedly connected to a preset fixed point on the machine body 5, and the other end passes through the grooves of the two movable pulleys 1 in sequence before being fixedly connected to the groove of the reel 11. The force-saving characteristics of the movable pulley system reduce the operating force requirement and improve the convenience of lifting operations.

[0030] Inside the body 5, there is also a clamping assembly, which includes a clamping base plate 3 and a clamping assembly 4. The clamping assembly 4 is assembled to the upper surface of the clamping base plate 3 through a detachable connection structure, such as bolt connection or positioning pin engagement. This detachable design allows the clamping assembly 4 to be quickly replaced according to different models and specifications of the main cone shaft assembly to be assembled, thereby improving the versatility of the device and adapting to the assembly needs of a variety of products.

[0031] To ensure the stability of the clamping assembly during the lifting process, the device is also equipped with a guiding mechanism, which includes two guide posts 7. The two guide posts 7 are parallel and fixedly arranged on both sides of the body 5. At the same time, linear bearings are installed on the clamping base plate 3 of the clamping assembly at the positions corresponding to the guide posts 7. The inner hole of the linear bearing slides with the outer circle of the guide post 7, so that the clamping assembly can slide up and down along the axial direction of the guide post 7. Through the cooperation between the guide post 7 and the linear bearing, the radial displacement of the clamping assembly during the lifting process can be limited, thereby ensuring the smoothness and coaxiality of the main cone shaft assembly during the lifting process.

[0032] To ensure safety during assembly operations, the device is equipped with a safety locking mechanism, as per [reference]. Figure 2 As shown, the safety locking mechanism includes a ratchet 13 and a pawl 12 that cooperate with each other. The ratchet 13 is set on the upper part of the machine body 5 and close to the drive component. The ratchet 13 is coaxially fixedly connected to the output shaft of the reducer 10 in the drive component and rotates synchronously with the output shaft. The pawl 12 is mounted on the machine body 5 through a hinge structure. Its free end can mesh with the tooth groove of the ratchet 13. When the main cone shaft assembly is lifted to the preset assembly position, the pawl 12 is engaged in the tooth groove of the ratchet 13. Through the one-way meshing relationship between the ratchet 13 and the pawl 12, the reverse rotation of the output shaft of the drive component is restricted, thereby preventing the main cone shaft assembly from falling accidentally due to the reverse rotation of the winding wheel 11, realizing the position locking function and ensuring the safety of the assembly operation.

[0033] In addition, the device also includes a buffer mechanism, which is a compression spring 2. The compression spring 2 is sleeved on the outer periphery of the guide post 7 and is located between the clamp base plate 3 and the bottom support structure of the body 5 in the clamp assembly. During the process of the clamp assembly driving the main cone shaft assembly to descend, when the clamp assembly descends to near the bottom of the body 5, the compression spring 2 is compressed by the clamp base plate 3. The elastic deformation of the spring absorbs the impact energy during the descent, playing a role in shock absorption and buffering, avoiding rigid collision between the clamp assembly and the bottom of the body 5, and protecting the main cone shaft assembly and device components from damage.

[0034] This embodiment, through the coordinated operation of the aforementioned body 5, lifting mechanism, clamping assembly, guiding mechanism, safety locking mechanism, and buffering mechanism, can achieve smooth lifting and precise positioning of the main cone shaft assembly from its initial position to its assembly position. At the same time, the safety locking mechanism ensures operational safety, effectively solving the problems of low efficiency and high labor intensity in existing manual assembly methods, and meeting the high-efficiency and safe assembly requirements of the main cone shaft assembly of the auxiliary gearbox of the new energy hybrid transmission.

[0035] Based on the structural design of the aforementioned shaft assembly lifting device, its specific usage process is as follows: First, the operator loosens the wire rope 6, allowing the clamp assembly 4 to slide along the guide column 7 to its lowest position along with the clamp base plate 3. Then, the main cone shaft assembly to be assembled is lifted into the clamp assembly 4 using a lifting device, and the positioning structure of the clamp assembly 4 ensures reliable fixation of the main cone shaft assembly. Next, the entire tooling device is moved to directly below the new energy hybrid gearbox assembly station and placed in position. The locking mechanism of the caster 8 is then used to lock the caster 8, preventing displacement of the tooling during subsequent operations. Afterwards, the operator... The operator turns the handwheel 9, which drives the input shaft of the reducer 10 to rotate. The output shaft of the reducer 10 simultaneously drives the ratchet 13 and the winding wheel 11 to rotate. As the winding wheel 11 rotates, the wire rope 6 gradually winds into the groove of the winding wheel 11. During this process, due to the shortening of the effective length of the wire rope 6, the two movable pulleys 1 move upward under the traction of the wire rope 6, which in turn drives the clamp base plate 3, the clamp assembly 4, and the main cone shaft assembly fixed in the clamp assembly 4 connected to the movable pulley group to move upward synchronously. Under the cooperation of the guide column 7 and the linear bearing, the main cone shaft assembly maintains a stable upward state.

[0036] If the main cone shaft assembly fails to align accurately and pass through the gearbox bearing hole during its upward movement towards the gearbox, the operator must first unlock the locking mechanism of caster 8 and push the tooling device to fine-tune its position until the main cone shaft can accurately align with the gearbox bearing hole and pass through smoothly. When the main cone shaft assembly continues to move upward to the preset assembly position inside the gearbox housing, the main cone shaft will be blocked by the limiting structure inside the gearbox housing. At this time, stop turning handwheel 9, and the pawl 12 in the safety locking mechanism will automatically engage in the tooth groove of ratchet 13 under the action of the return spring. Through the one-way limiting action of ratchet 13 and pawl 12, the winding wheel 11 is restricted from reversing, thereby keeping the main cone shaft assembly, fixture assembly 4 and fixture base plate 3 in their current positions to prevent them from falling downwards. Then the operator can proceed with the assembly process of the main cone shaft assembly and the gearbox.

[0037] After the main cone shaft assembly is assembled, the main cone shaft is reliably connected to the gearbox through the assembly structure and will not fall off. At this time, the operator manually operates the pawl 12 to disengage it from the ratchet 13 and release the safety lock. The clamp assembly 4 and the clamp base plate 3 fall naturally along the guide post 7 under their own weight. During this process, the winding wheel 11 rotates in the opposite direction under the pull of the wire rope 6, which in turn drives the reducer 10 and the handwheel 9 to rotate synchronously. When the clamp base plate 3 descends to near the bottom of the machine body 5, the compression spring 2 sleeved on the guide post 7 is squeezed by the clamp base plate 3. The compression spring 2 generates a buffer force through elastic deformation, which plays a role in shock absorption and blocking, and avoids a rigid collision between the clamp base plate 3 and the bottom of the machine body 5. Finally, the operator unlocks the locking mechanism of the caster 8 and moves the tooling device out of the assembly workpiece to carry out other subsequent assembly processes. This completes one assembly operation of the main cone shaft assembly.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shaft assembly lifting device, characterized in that, Includes a body (5), which is connected to a clamping assembly and a lifting mechanism; The lifting mechanism includes a drive assembly, a movable pulley (1), and a traction component. The drive assembly drives the movable pulley (1) to move by extending and retracting the traction component. The clamping assembly is located inside the machine body (5), and the machine body (5) has a space for the clamping assembly to generate longitudinal displacement. The movable pulley (1) is connected to the clamping assembly.

2. The shaft assembly lifting device according to claim 1, characterized in that, It also includes a safety locking mechanism, which includes a ratchet (13) and a pawl (12) that cooperate with each other on the upper part of the body (5). The ratchet (13) is coaxially arranged with the output shaft of the drive assembly.

3. The shaft assembly lifting device according to claim 1, characterized in that, It also includes a guide mechanism disposed inside the body (5), the guide mechanism including at least one guide post (7) fixed on the body (5), the clamp assembly being sleeved on the guide post (7) and being able to slide along it.

4. The shaft assembly lifting device according to claim 3, characterized in that, A buffer mechanism is provided between the clamp assembly and the body (5), and the buffer mechanism is an elastic component sleeved on the guide post (7).

5. The shaft assembly lifting device according to claim 3, characterized in that, The guide posts (7) are set as two, arranged in parallel on both sides of the body (5), and the clamping assembly cooperates with the guide posts (7) through linear bearings.

6. The shaft assembly lifting device according to claim 1, characterized in that, The drive assembly is installed on the upper part of the machine body (5) and includes a handwheel (9), a reducer (10) and a winding reel (11). The handwheel (9) drives the winding reel (11) to rotate through the reducer (10). The traction component is a steel wire rope (6) provided on the winding reel (11).

7. The shaft assembly lifting device according to claim 6, characterized in that, Two movable pulleys (1) are provided and connected in series by the steel wire rope (6) to form a movable pulley (1) group structure.

8. The shaft assembly lifting device according to claim 1, characterized in that, The clamping assembly includes a clamping base plate (3) and a clamping assembly (4) detachably mounted on the clamping base plate (3).

9. The shaft assembly lifting device according to claim 1, characterized in that, The bottom of the body (5) is provided with several casters (8), at least one of the casters (8) having a locking function.

10. The shaft assembly lifting device according to claim 1, characterized in that, One end of the traction component is fixed to the machine body (5), and the other end passes around the movable pulley (1) and is connected to the drive component.

Images