A jacking device capable of uniformly applying grease

Abstract

The application belongs to the technical field of jacking equipment, and discloses jacking equipment capable of uniformly applying grease, which comprises a guide assembly, a supporting assembly, a no-load coating assembly and an oil supply assembly. The guide assembly extends vertically, and the supporting assembly is movably sleeved on the guide assembly vertically. When the jacking equipment is used, the supporting assembly is supported below a jacking mechanism, and the jacking mechanism can be lifted when the supporting assembly moves upward relative to the guide assembly. The no-load coating assembly is sleeved on the guide assembly and connected above the supporting assembly. During jacking, the supporting assembly bears the gravity load of the jacking mechanism, and the no-load coating assembly moves upward synchronously with the supporting assembly, but it is in no-load operation. Therefore, the no-load coating assembly and the guide assembly are not inclined on the axis, and the lubricating grease between the no-load coating assembly and the guide assembly cannot be squeezed out, so that the uniformity of grease application is ensured, the wear of the supporting assembly is reduced, and the equipment and the surrounding environment are avoided from being polluted.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, and in particular to a lifting device capable of uniformly applying grease. Background Technology

[0002] Lifting equipment is widely used in the machinery industry. Its function is to support the mechanism to be lifted so that a certain operating space is created below the mechanism to be lifted.

[0003] For example, in the transportation industry, vehicles need to be inspected regularly. When transportation vehicles enter the workshop for maintenance, a lifting machine is used to lift the vehicle body for maintenance work. The lifting machine includes a vertically arranged lead screw and a nut fitted onto the lead screw, with a bracket connected to the nut. During lifting, the bracket is supported under the vehicle body, and the lead screw is driven to rotate around its own axis, causing the nut to move the bracket upward, thus lifting the vehicle body. Because the lifted vehicle is heavy, the load on the bracket and nut is also large, and the lifting machine operates on one side with an off-center load, resulting in a large off-center torque on the nut. This causes the axis of the nut to deviate from the axis of the lead screw, leading to poor transmission and severe friction and wear on the nut.

[0004] In existing technology, to ensure smoother and more unobstructed nut transmission, a common practice is to open an oil inlet on the nut and use an oil pump to add grease into the inlet to improve lubrication conditions for nut transmission. However, under load, it is difficult to inject or retain grease on the thread meshing surface of the nut. At the same time, the large misalignment between the nut and the lead screw also affects the uniformity of oil injection, resulting in inadequate lubrication between the nut and the lead screw. In addition, a large amount of injected grease is squeezed out by the nut, causing waste and easily contaminating the lifting machine and the environment in the maintenance workshop. Summary of the Invention

[0005] The purpose of this invention is to provide a lifting device that can uniformly apply grease, which can effectively improve the lubrication effect during lifting operations and prevent grease from being squeezed out and contaminating the device.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A lifting device capable of uniformly applying grease includes:

[0008] A guide assembly that extends vertically;

[0009] A support component, which is vertically movably sleeved on the guide component, is configured to support the lifting mechanism.

[0010] An unloaded coating assembly is sleeved on the guide assembly and connected above the support assembly;

[0011] An oil supply assembly is used to inject lubricating grease between the unloaded coating assembly and the guide assembly.

[0012] As a preferred embodiment of the lifting device capable of uniformly applying grease provided by the present invention, the guide assembly includes a vertically arranged lead screw, and the support assembly and the unloaded coating assembly are both threadedly connected to the lead screw. The lead screw can rotate around its own axis so that the support assembly and the unloaded coating assembly move synchronously relative to the lead screw in a vertical direction.

[0013] As a preferred embodiment of the lifting device capable of uniformly applying grease provided by the present invention, the unloaded coating component is provided with an oil passage hole, the oil passage hole extends radially along the lead screw, and the lubricating grease in the oil supply component is injected into the space between the unloaded coating component and the lead screw through the oil passage hole.

[0014] As a preferred embodiment of the lifting device capable of uniformly applying grease provided by the present invention, the supporting assembly includes a transmission part and a bracket. The transmission part is provided with a threaded hole, which cooperates with the lead screw. The bracket is configured to support the lifting mechanism.

[0015] As a preferred embodiment of the lifting device capable of uniformly applying grease provided by the present invention, it further includes a connector, one end of which is connected to the support assembly and the other end of which is connected to the unloaded coating assembly.

[0016] As a preferred embodiment of the lifting device capable of uniformly applying grease provided by the present invention, the connecting member is provided with a strip-shaped hole along the vertical direction, the supporting component is provided with a first limiting post, and the unloaded coating component is provided with a second limiting post. The first limiting post and the second limiting post are both inserted into the strip-shaped hole and are rotatably engaged with the strip-shaped hole.

[0017] As a preferred embodiment of the lifting device capable of uniformly applying grease provided by the present invention, one of the first limiting post and the second limiting post can slide within the strip hole.

[0018] As a preferred embodiment of the lifting device capable of uniformly applying grease provided by the present invention, the supporting component has a plurality of connecting pins arranged vertically on the side facing the unloaded coating component, and the unloaded coating component has a plurality of pin holes corresponding one-to-one with the connecting pins on the side facing the supporting component. The connecting pins are inserted into the pin holes and have a gap with the hole wall of the pin hole.

[0019] As a preferred embodiment of the lifting device capable of uniformly applying grease provided by the present invention, a first connecting ring is coaxially arranged on the side of the unloaded coating component facing the support component, and a second connecting ring is coaxially arranged on the side of the support component facing the unloaded coating component. The first connecting ring has a plurality of limiting protrusions protruding in the circumferential direction, and the inner wall of the second connecting ring has a plurality of limiting grooves corresponding one-to-one with the limiting protrusions in the circumferential direction. The limiting protrusions are inserted into the limiting grooves and have a gap with the groove wall of the limiting groove.

[0020] The beneficial effects of this invention are:

[0021] This invention provides a lifting device capable of uniformly applying grease, comprising a guide assembly, a support assembly, an unloaded coating assembly, and an oil supply assembly. The guide assembly extends vertically, and the support assembly is movably mounted on the guide assembly vertically. When using the lifting device, the support assembly is placed below the mechanism to be lifted. When the support assembly moves upward relative to the guide assembly, it can lift the mechanism to be lifted. The guide assembly can guide the vertical movement of the mechanism to be lifted. The unloaded coating assembly is fitted onto the guide assembly and connected above the support assembly. When the support assembly moves up and down relative to the guide assembly, the unloaded coating assembly can move up and down synchronously with the support assembly. During this process, the oil supply assembly can inject lubricating grease between the unloaded coating assembly and the guide assembly. Since the unloaded coating assembly is movably fitted onto the guide assembly, it can coat the guide assembly with lubricating grease. By setting the unloaded coating assembly above the support assembly, it can be ensured that the support assembly passes through the area coated by the unloaded coating assembly when it rises, thus ensuring that there is lubricating grease between the support assembly and the guide assembly. During the lifting process, the support component bears the gravity load of the mechanism to be lifted, while the unloaded coating component, although moving upward synchronously with the support component, operates without load. Therefore, there is no axial misalignment between the unloaded coating component and the guide component, and the lubricating grease between them will not be squeezed out. This allows the unloaded coating component to evenly apply the lubricating grease to the guide component, ensuring good lubrication conditions for the support component during the lifting process, reducing wear on the support component, improving transmission efficiency and the safety and reliability of the lifting process, and preventing pollution of the equipment and the surrounding environment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the lifting device capable of uniformly applying grease provided in Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the engagement of the first connecting ring and the second connecting ring provided in Embodiment 2 of the present invention.

[0024] In the picture:

[0025] 1. Guiding assembly; 2. Supporting assembly; 3. Unloaded coating assembly; 4. Connecting components;

[0026] 21. Transmission unit; 22. Bracket; 23. First limiting post;

[0027] 31. Oil passage hole; 32. Second limiting post;

[0028] 41. Slotted hole;

[0029] 51. First connecting ring; 511. Limiting protrusion;

[0030] 52. Second connecting ring; 521. Limiting groove. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical 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 invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly 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 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 directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0035] Example 1

[0036] like Figure 1 As shown, this embodiment provides a lifting device capable of uniformly applying grease, including a guide assembly 1, a support assembly 2, an unloaded coating assembly 3, and an oil supply assembly.

[0037] The lifting device comprises a guide assembly 1 extending vertically, and a support assembly 2 movably mounted vertically on the guide assembly 1. When using this lifting device, the support assembly 2 is positioned below the mechanism to be lifted. As the support assembly 2 moves upward relative to the guide assembly 1, it supports the mechanism to be lifted, and the guide assembly 1 guides the vertical movement of the mechanism. An unloaded coating assembly 3 is mounted on the guide assembly 1 and connected above the support assembly 2. When the support assembly 2 moves up and down relative to the guide assembly 1, the unloaded coating assembly 3 moves up and down synchronously with it. During this process, the oil supply assembly injects lubricating grease between the unloaded coating assembly 3 and the guide assembly 1. Because the unloaded coating assembly 3 is movably mounted on the guide assembly 1, it can apply lubricating grease to the guide assembly 1. By placing the unloaded coating assembly 3 above the support assembly 2, it is ensured that the support assembly 2 passes over the area coated by the unloaded coating assembly 3 during its ascent, thus ensuring the presence of lubricating grease between the support assembly 2 and the guide assembly 1. During the lifting process, the support assembly 2 bears the gravity load of the mechanism to be lifted, while the unloaded coating assembly 3, although moving upward synchronously with the support assembly 2, operates without load. Therefore, there is no axial misalignment between the unloaded coating assembly 3 and the guide assembly 1, preventing the lubricating grease from being squeezed out. This allows the unloaded coating assembly 3 to evenly apply the lubricating grease to the guide assembly 1, ensuring good lubrication conditions for the support assembly 2 during lifting, reducing wear on the support assembly 2, improving transmission efficiency and the safety and reliability of the lifting process, and preventing pollution of the equipment and the surrounding environment.

[0038] In this embodiment, a car lifting machine is used as an example for further detailed explanation. The lifting mechanism is a vehicle to be inspected in the workshop. The support component 2 is used to lift the vehicle body for inspection. Of course, the arrangement of the support component 2 and the unloaded coating component 3 is not limited to use in car lifting machines. It can also be applied to other lifting equipment with off-center loading, and can effectively improve lubrication conditions.

[0039] Optionally, the guide assembly 1 includes a vertically arranged lead screw, on which the support assembly 2 and the unloaded coating assembly 3 are both sleeved and threadedly connected. The lead screw can rotate around its own axis, so that the support assembly 2 and the unloaded coating assembly 3 move synchronously relative to the lead screw in a vertical direction, thereby realizing the lifting of the vehicle body by the support assembly 2. Further, a drive motor is provided at the upper end of the lead screw, and the output end of the drive motor is connected to the lead screw for transmission. During lifting, the drive motor is started, and the lead screw can rotate. At the same time, the support assembly 2 and the unloaded coating assembly 3 move upward synchronously, and the vehicle body moves upward under the lifting force of the support assembly 2.

[0040] Optionally, see Figure 1 The support assembly 2 includes a transmission part 21 and a bracket 22. The transmission part 21 has a threaded hole that mates with a lead screw, meaning the transmission part 21 is threadedly connected to the lead screw. The bracket 22 is positioned above the transmission part 21 and is used to support the vehicle body to be inspected. The bracket 22 is relatively larger than the transmission part 21, which increases the overall strength of the support assembly 2 and prevents overload deformation. Furthermore, the bracket 22 has a sufficiently large contact area with the vehicle body, preventing stress concentration. In this embodiment, the transmission part 21 can be a nut.

[0041] Optionally, see Figure 1 The unloaded coating assembly 3 is provided with an oil passage hole 31, which extends radially along the lead screw. That is, the axis of the oil passage hole 31 is perpendicular to the axis of the lead screw. Lubricating grease in the oil supply assembly is injected into the space between the unloaded coating assembly 3 and the lead screw through the oil passage hole 31. By providing the oil passage hole 31, the oil outlet of the oil supply assembly can be easily connected to the oil passage hole 31, thereby filling the space between the unloaded coating assembly 3 and the lead screw with grease.

[0042] See Figure 1 In this embodiment, optionally, the support component 2 and the unloaded coating component 3 are connected by a connector 4. One end of the connector 4 is connected to the bracket 22 of the support component 2, and the other end is connected to the unloaded coating component 3, so that when the lead screw rotates, the support component 2 can move upward synchronously with the unloaded coating component 3.

[0043] See Figure 1The connector 4 has a vertically oriented slot 41. The support assembly 2 has a protruding first limiting post 23, and the unloaded coating assembly 3 has a protruding second limiting post 32. Both the first limiting post 23 and the second limiting post 32 pass through the slot 41 and rotatably engage with it. When the bracket 22 bears the weight of the vehicle body, the entire support assembly 2 experiences a unilateral off-center load, resulting in a large off-center torque. This causes the support assembly 2 to rotate slightly relative to the lead screw, thereby causing the first limiting post 23 to rotate adaptively relative to the slot 41, and the connector 4 to rotate adaptively relative to the second limiting post 32. This accommodates the slight rotation of the support assembly 2, preventing the off-center torque on the support assembly 2 from being transmitted to the unloaded coating assembly 3, thus ensuring that the unloaded coating assembly 3 always operates under no-load conditions. It should be noted that the first limiting post 23 is fixed to the support assembly 2 and will not rotate relative to it. The second limiting post 32 is also fixed on the unloaded coating assembly 3 and will not rotate relative to the unloaded coating assembly 3.

[0044] Furthermore, the first limiting post 23 can slide within the strip hole 41. When the bracket 22 bears the weight of the vehicle body, the entire supporting assembly 2 moves slightly downward relative to the unloaded coating assembly 3 due to the downward pressure. Driven by the supporting assembly 2, the first limiting post 23 slides within the strip hole 41 to prevent the force from being transmitted to the unloaded coating assembly 3. In this embodiment, the uppermost end of the wall of the strip hole 41 is rotatably engaged with the second limiting post 32, and the first limiting post 23 is spaced apart from the lowermost end of the wall of the strip hole 41. Of course, in other embodiments, the uppermost end of the wall of the strip hole 41 may be spaced apart from the second limiting post 32, and the lowermost end of the wall of the strip hole 41 may be rotatably engaged with the first limiting post 23.

[0045] It should be noted that when the bracket 22 bears the weight of the vehicle body, the entire support assembly 2 is simultaneously subjected to downward pressure and off-center torque. Therefore, while the support assembly 2 moves slightly downward relative to the unloaded coating assembly 3, it will also rotate slightly. Due to the rotational cooperation between the first limiting post 23 and the second limiting post 32 and the strip hole 41, as well as the movement of the first limiting post 23 within the strip hole 41, the force and torque on the support assembly 2 can be prevented from being transmitted to the unloaded coating assembly 3, ensuring that the axis of the unloaded coating assembly 3 does not deviate from that of the lead screw.

[0046] Example 2

[0047] This embodiment provides a lifting device capable of uniformly applying grease. The difference between this embodiment and Embodiment 1 is that no additional connector 4 is provided to connect the support assembly 2 and the unloaded coating assembly 3. A first connecting ring 51 is coaxially arranged on the side of the unloaded coating assembly 3 facing the support assembly 2, and a second connecting ring 52 is coaxially arranged on the side of the support assembly 2 facing the unloaded coating assembly 3. See also... Figure 2The first connecting ring 51 has multiple circumferentially protruding limiting protrusions 511, and the inner wall of the second connecting ring 52 has multiple circumferentially recessed limiting grooves 521. The limiting protrusions 511 are vertically inserted into the limiting grooves 521 one by one, and there is a gap between the limiting protrusions 511 and the limiting grooves 521. The multiple limiting protrusions 511 and the multiple limiting grooves 521 form a spline-like connection, which can ensure that the unloaded coating assembly 3 moves up or down with the supporting assembly 2. Because there is a gap between the limiting protrusions 511 and the limiting grooves 521, when the supporting assembly 2 is subjected to an off-center load and rotates slightly, it can prevent the load from being transmitted to the unloaded coating assembly 3 and prevent the lubricating grease between the unloaded coating assembly 3 and the lead screw from being squeezed out.

[0048] Example 3

[0049] This embodiment provides a lifting device capable of uniformly applying grease. The difference from Embodiment 1 is that this embodiment does not use an additional connector 4 to connect the support assembly 2 and the unloaded coating assembly 3. Instead, multiple connecting pins are vertically arranged on the side of the support assembly 2 facing the unloaded coating assembly 3, and multiple vertically extending pin holes are provided on the side of the unloaded coating assembly 3 facing the support assembly. Each connecting pin corresponds to one of the pin holes, and each connecting pin is inserted into its corresponding pin hole with a gap between the pin and the hole wall. The engagement of the connecting pins and pin holes allows the unloaded coating assembly 3 to move up or down with the support assembly 2. Because of the gap between the connecting pins and the pin hole walls, when the support assembly 2 is subjected to off-center load and undergoes slight rotation, the load is prevented from being transmitted to the unloaded coating assembly 3, thus preventing the lubricating grease between the unloaded coating assembly 3 and the lead screw from being squeezed out. Alternatively, vertical connecting pins can be provided on the side of the unloaded coating assembly 3 facing the support assembly 2, while corresponding pin holes are provided on the support assembly 2.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A lifting device capable of uniformly applying grease, characterized in that, include: Guide component (1), the guide component (1) extending vertically; Support component (2), which is vertically movably sleeved on the guide component (1), and is configured to support the lifting mechanism; An unloaded coating assembly (3) is sleeved on the guide assembly (1) and connected above the support assembly (2). The unloaded coating assembly (3) and the support assembly (2) are spaced apart. When the support assembly (2) moves up and down relative to the guide assembly (1), the unloaded coating assembly (3) can move up and down synchronously with the support assembly (2). An oil supply assembly is used to inject lubricating grease between the unloaded coating assembly (3) and the guide assembly (1); Connector (4), one end of which is connected to the support assembly (2) and the other end is connected to the unloaded coating assembly (3). The connector (4) has a vertically arranged strip hole (41), the support component (2) has a protruding first limiting post (23), and the unloaded coating component (3) has a protruding second limiting post (32). The first limiting post (23) and the second limiting post (32) are both inserted into the strip hole (41) and are rotatably engaged with the strip hole (41).

2. The lifting device capable of uniformly applying grease according to claim 1, characterized in that, The guide assembly (1) includes a vertically arranged lead screw. The support assembly (2) and the unloaded coating assembly (3) are both threadedly connected to the lead screw. The lead screw can rotate around its own axis so that the support assembly (2) and the unloaded coating assembly (3) move synchronously relative to the lead screw in the vertical direction.

3. The lifting device capable of uniformly applying grease according to claim 2, characterized in that, The unloaded coating assembly (3) is provided with an oil passage hole (31), which extends radially along the lead screw. The lubricating grease in the oil supply assembly is injected between the unloaded coating assembly (3) and the lead screw through the oil passage hole (31).

4. The lifting device capable of uniformly applying grease according to claim 2, characterized in that, The support assembly (2) includes a transmission part (21) and a bracket (22). The transmission part (21) is provided with a threaded hole that engages with the lead screw. The bracket (22) is configured to support the lifting mechanism.

5. The lifting device capable of uniformly applying grease according to claim 1, characterized in that, One of the first limiting post (23) and the second limiting post (32) can slide within the strip hole (41).

6. The lifting device capable of uniformly applying grease according to any one of claims 1-4, characterized in that, The supporting component (2) has a plurality of connecting pins arranged vertically on the side facing the unloaded coating component (3). The unloaded coating component (3) has a plurality of pin holes corresponding to the connecting pins on the side facing the supporting component (2). The connecting pins are inserted into the pin holes and there is a gap between them and the hole wall.

7. The lifting device capable of uniformly applying grease according to any one of claims 1-4, characterized in that, The unloaded coating assembly (3) has a first connecting ring (51) coaxially arranged on the side facing the support assembly (2), and the support assembly (2) has a second connecting ring (52) coaxially arranged on the side facing the unloaded coating assembly (3). The first connecting ring (51) has a plurality of limiting protrusions (511) protruding in the circumferential direction, and the inner wall of the second connecting ring (52) has a plurality of limiting grooves (521) corresponding one-to-one with the limiting protrusions (511) in the circumferential direction. The limiting protrusions (511) are inserted into the limiting grooves (521) and there is a gap between them and the groove wall of the limiting grooves (521).

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