A car maintenance lifting device

Abstract

This utility model relates to the field of automotive repair technology, and in particular to an automotive repair lifting device. It includes symmetrically arranged bases, each with a lifting frame on top. The device further includes: a hydraulic unit, one end of which is connected to the lifting frame and the other end to the base, driving the lifting frame to perform lifting operations during extension and retraction; a support device, including a main support member connected to the lifting frame, a pusher member at the top of the main support member, and a secondary support member at the output end of the pusher member; and a height detection component, located on opposite sides of the two secondary support members, for detecting whether the two secondary support members are on the same plane. This utility model, by incorporating the height detection component, can accurately detect the height difference between the two secondary support members and control the pusher member accordingly to keep the secondary support members level, preventing the vehicle from falling due to unevenness.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair technology, and in particular to an automotive repair lifting device. Background Technology

[0002] A vehicle maintenance lift (also known as a car lift) is an indispensable piece of equipment in maintenance and repair. It is mainly used to raise a vehicle to a suitable height so that technicians can inspect, replace, or maintain the chassis, tires, braking system, and other bottom components.

[0003] Currently, the main types of lifts include two-post lifts and hydraulic scissor lifts. Hydraulic scissor lifts use a cross-scissor bracket structure, with hydraulic cylinders pushing the bracket to unfold and achieve lifting. However, they are prone to swaying during the lifting process, resulting in poor stability. Furthermore, after lifting, they are only supported by two hydraulic cylinders without any auxiliary support mechanism, leading to lower safety during car repairs.

[0004] Chinese patent application number CN202210365356.X discloses a washable safety lifting device for automobile repair, relating to the field of automobile repair technology. It includes a lifting mechanism with auxiliary support cleaning devices installed on opposite sides of the two lifting mechanisms. Each auxiliary support cleaning device includes a guide support mechanism. Through the cooperation of four guide support mechanisms and two sliding connection mechanisms, when the two lifting plates are lifted, four sliding plates move upward in the sliding grooves of four support columns via two four-connecting blocks. This, in turn, drives the cleaning mechanism upward. The upward movement of the four sliding plates in the sliding grooves of the four support columns improves the stability of the lifting plate's upward movement. After lifting, the insertion holes of the four connecting blocks overlap parallel to the four insertion posts on the four support columns. Inserting the four insertion posts into the insertion holes of the four connecting blocks provides limiting, thereby providing auxiliary support for the lifting plates, preventing them from falling in case of malfunction, and improving the safety of automobile repair.

[0005] The aforementioned patent document proposes that the stability of the lifting plate's movement and ascent can be improved by setting up a guide support mechanism and a sliding connection mechanism. However, in practical applications, the hydraulic system of existing scissor lifts may experience excessive wear during long-term use. Once the hydraulic system is excessively worn, the seals inside the cylinders will fail, causing hydraulic oil to leak from the high-pressure chamber into the low-pressure chamber, thereby reducing the thrust on one side. This imbalance in the hydraulic system can cause unevenness in the vehicle after the scissor lift has lifted it.

[0006] Uneven vehicle height can cause a shift in the vehicle's center of gravity, resulting in excessive stress on certain parts of the vehicle body. This can lead to deformation or cracking of critical components such as the chassis longitudinal beams and suspension supports. Furthermore, when the height difference exceeds a safe threshold, the vehicle's center of gravity becomes severely unbalanced, potentially causing it to slip off the lift or overturn, posing a fatal threat to maintenance personnel. Utility Model Content

[0007] The purpose of this utility model is to provide an automobile maintenance lifting device to solve the technical problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A car maintenance lifting device includes symmetrically arranged bases, each base having a lifting frame mounted on top of it, and further includes:

[0010] The hydraulic unit is connected at one end to the lifting frame and at the other end to the base. When it extends or retracts, it drives the lifting frame to perform lifting operations.

[0011] A support device includes a main support member connected to a lifting frame, a pusher member at the top of the main support member, and a secondary support member at the output end of the pusher member;

[0012] A height detection component is installed on the opposite side of the two secondary supports to detect whether the two secondary supports are on the same plane.

[0013] Preferably, the height detection component includes a light emitter and a light receiver respectively disposed on opposite sides of the two secondary supports, and the light receivers are arrayed along the height direction of the secondary supports.

[0014] Preferably, a limiting device is provided between the main support member and the secondary support member. When the vehicle is tilted, the limiting device forms a supporting block on the side of the vehicle to achieve the limiting operation of the vehicle.

[0015] Preferably, the limiting device includes:

[0016] The mounting base is symmetrically arranged on the top of the main support member and has a cavity inside;

[0017] The first sealing block is located inside the cavity and can move along the cavity axis;

[0018] The limiting bracket is connected to the first sealing block via a connecting rod. When the first sealing block moves upward along the cavity axis, it forms a support and block on the side of the vehicle.

[0019] The extrusion section is symmetrically arranged on the top of the main support member and is connected to the corresponding mounting seat through a conduit.

[0020] Preferably, an elastic element is provided inside the cavity, one end of which is connected to the mounting base and the other end is connected to the first sealing block.

[0021] Preferably, the secondary support member is provided with a clearance groove corresponding to the limiting frame.

[0022] Preferably, the hydraulic unit includes a cylinder rotatably connected to the base, a piston is provided inside the cylinder, a seal is provided on the outside of the piston, and the piston is rotatably connected to the lifting frame through a piston rod; the extension and retraction of the piston rod is achieved by injecting / discharging hydraulic oil into the cylinder.

[0023] Preferably, the piston rod has a channel inside, which communicates with a sealing cavity disposed inside the piston component, and the sealing cavity is connected to a sealing component.

[0024] Preferably, the bottom of the mounting base is provided with an access hole, which is connected to the channel via a flexible hose;

[0025] A connector is provided below the first sealing block, and a sealing block is provided at the bottom of the connector to seal the inlet hole.

[0026] Preferably, the bottom of the mounting base is connected to the channel via a flexible hose, and the flexible hose is equipped with an electromagnetic on / off valve.

[0027] The technical effects and advantages of this utility model are as follows:

[0028] This new invention, by incorporating a height detection component, can accurately detect the height difference between two secondary support members and control the adjustment of the pusher accordingly to keep the secondary support members level, preventing the vehicle from falling due to unevenness. By adding a limiting device, it creates a barrier on the side when the vehicle is tilted for adjustment, further preventing the vehicle from slipping. Furthermore, by improving the piston rod structure, during leveling operations, the sealing element is expanded using a medium to compensate for wear, preventing subsequent oil leakage during lifting. This solves the core problem of secondary support member misalignment caused by hydraulic system wear, ensuring safe and stable lifting operations. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0030] Figure 2 This is a schematic diagram showing the secondary support member of the present invention in a horizontal state;

[0031] Figure 3 This is a schematic diagram showing the state of the secondary support member of the present invention in a misaligned state;

[0032] Figure 4 This is a schematic diagram of the combined structure of the main support member and the secondary support member of the present invention;

[0033] Figure 5 This is a schematic diagram of the support device of the present invention;

[0034] Figure 6 This is a top view of the support device of the present invention;

[0035] Figure 7 This is a schematic diagram of the limiting device of the present invention;

[0036] Figure 8 This is a schematic diagram of the hydraulic unit of the present invention;

[0037] Figure 9 This is a schematic diagram of the cross-sectional structure of the piston rod of the present invention.

[0038] The attached figures are labeled as follows:

[0039] 1. Base;

[0040] 2. Lifting frame;

[0041] 3. Hydraulic unit; 301. Cylinder; 302. Piston; 303. Seals; 304. Piston rod; 305. Channel; 306. Sealing cavity;

[0042] 4. Support device; 401. Main support component; 402. Pushing component; 403. Secondary support component;

[0043] 5. Height detection component; 501. Light emitter; 502. Light receiver;

[0044] 6. Limiting device; 601. Mounting base; 602. Cavity; 603. First sealing block; 604. Limiting frame; 605. Extrusion part; 606. Guide tube; 607. Elastic element;

[0045] 7. Leaving slot;

[0046] 8. Connectors;

[0047] 9. Sealing block;

[0048] 10. Hose. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] Reference Figures 1 to 6As shown, this invention provides an automotive repair lifting device, including symmetrically arranged bases 1, with lifting frames 2 mounted above each base 1. A hydraulic unit 3 is located between the lifting frames 2 and the bases 1. When the hydraulic unit 3 extends or retracts, it drives the lifting frames 2 to perform lifting operations. In this embodiment, the lifting frame 2 is a scissor-type lifting frame 2. The scissor-type lifting frame 2 is driven by a motor or hydraulic system to extend or retract the multi-layered X-shaped cross-hinged metal arms, achieving vertical lifting of the worktable. The working principle of the scissor-type lifting frame 2 is prior art and will not be described in detail here.

[0052] The hydraulic unit 3 includes a cylinder 301 rotatably connected to the base 1. A piston 302 is housed inside the cylinder 301, and a seal 303, including an elastic sealing ring, is located on the outer side of the piston 302. The piston 302 is rotatably connected to the lifting frame 2 via a piston rod 304. The extension and retraction of the piston rod 304 is achieved by injecting / discharging hydraulic oil into the cylinder 301. When the piston 302 extends, the lifting frame 2 is in a vertically rising state; when the piston 302 retracts, the lifting frame 2 is in a vertically descending state.

[0053] A support device 4 is provided above the lifting frame 2, which includes a main support member 401 connected to the lifting frame 2, a pusher 402 is provided at the top of the main support member 401, and a secondary support member 403 is provided at the output end of the pusher 402.

[0054] A height detection component 5 is disposed on the opposite side of the two secondary supports 403 to detect whether the two secondary supports 403 are on the same plane. The height detection component 5 includes a light emitter 501 and a light receiver 502 respectively disposed on the opposite side of the two secondary supports 403, and the light receiver 502 is arrayed along the height direction of the secondary supports 403.

[0055] In the initial state, the pusher 402 is stationary, and the two secondary support 403 are at the same height.

[0056] In the lifting device involved in this application, its hydraulic components, electric components, and detection components are all connected to an external control terminal via network or electrical connections, and the control system inside the control terminal uniformly regulates these components. It should be noted that the configuration of the control terminal is within the scope of prior art and will not be described in detail here.

[0057] In use, the car is parked on top of the secondary support 403. When lifting the car, the control system injects hydraulic oil into the cylinder 301 to extend the piston rod 304. As the piston rod 304 extends, it simultaneously drives the lifting frame 2 to unfold, lifting the car for maintenance personnel to perform repairs. After the repairs are completed, the control system discharges the hydraulic oil from the cylinder 301 to retract the piston rod 304. As the piston rod 304 retracts, it simultaneously drives the lifting frame 2 to close, causing the car to gradually lower until it contacts the ground.

[0058] During the deployment of the lifting frame 2, a light emitter 501 mounted on one of the secondary supports 403 emits a detection light beam toward the other secondary support 403. This detection light beam is received by a light receiver 502 mounted on the other secondary support 403. The light receiver 502 converts the received light signal into an electrical signal and transmits it to the control system.

[0059] Because the optical receivers 502 are arrayed along the height of the secondary support 403, under normal conditions, the control system only receives signals transmitted from the optical receiver 502 located in the center. However, when the control system receives signals transmitted from optical receivers other than the center optical receiver 502, it indicates that during the lifting process of the lifting devices located on both sides of the vehicle, the secondary support 403s to which the two lifting devices belong are in an interleaved state.

[0060] Specifically:

[0061] If the control system receives an electrical signal transmitted from the optical receiver 502 located above the central optical receiver 502, it indicates that the secondary support 403 corresponding to the optical transmitter 501 is higher than the secondary support 403 corresponding to the optical receiver 502. At this time, the control system calculates the height difference between the two secondary supports 403 based on the distance difference between the optical receiver 502 that emitted the electrical signal and the central optical receiver 502, and controls the pusher 402 to adjust its height accordingly.

[0062] The specific steps are as follows:

[0063] Based on the calculated height difference, the control system controls the pusher 402 corresponding to the secondary support 403 on which the light emitter 501 is installed to retract, so that it is level with the secondary support 403 located at the lower position, thereby making the two secondary support 403 return to a horizontal state.

[0064] If the control system receives an electrical signal transmitted from the optical receiver 502 located below the central optical receiver 502, it indicates that the secondary support 403 corresponding to the optical transmitter 501 is lower than the secondary support 403 corresponding to the optical receiver 502. At this time, the control system, based on the height difference between the two secondary support 403s, controls the pusher 402 corresponding to the secondary support 403 on which the optical receiver 502 is mounted to retract, thereby lowering the height of the secondary support 403 and restoring both secondary support 403s to a horizontal state, thus preventing the vehicle from slipping due to unevenness.

[0065] It should be noted that the working principle of the light transmitter 501 and the light receiver 502 can be compared with that of the infrared generator and the infrared receiver. Their working principle is within the scope of existing technology and will not be elaborated here.

[0066] Example 2

[0067] Although the above embodiment calculates the height difference between the two secondary support members 403 and controls the pusher 402 to adjust the height accordingly, thus restoring the two secondary support members 403 to a horizontal state, during the lifting process, since the car is already tilted, there is still a risk of the car slipping if there is no limiting mechanism during the leveling adjustment. Therefore, a technical improvement is made based on Embodiment 1, and the improved technical solution is as follows:

[0068] Reference Figures 1 to 7 As shown, the present invention provides a car maintenance lifting device, wherein a limiting device 6 is provided between the main support member 401 and the secondary support member 403. When the vehicle is tilted, the limiting device 6 forms a block on the side of the vehicle to achieve the limiting operation of the vehicle.

[0069] The limiting device 6 includes a mounting base 601 symmetrically arranged on the top of the main support member 401, and a cavity 602 is provided inside the mounting base 601; a first sealing block 603 is provided inside the cavity 602, and the first sealing block 603 can move along the axial direction of the cavity 602; a sealing ring is provided on the side of the first sealing block 603 to achieve a sealed sliding connection with the cavity 602.

[0070] A limiting frame 604 is provided above the mounting base 601. The limiting frame 604 is connected to the first sealing block 603 through a connecting rod. When the first sealing block 603 moves upward along the cavity 602, it forms a block on the side of the vehicle. The limiting frame 604 is "L" shaped. Its horizontal part is connected to the first sealing block 603 through a connecting rod, and its vertical part is used to form a block on the side of the vehicle. At the same time, the vertical part can be covered with a flexible sheet to avoid scratching the side of the vehicle.

[0071] The top of the main support member 401 is symmetrically provided with extrusion sections 605, which are connected to the corresponding mounting base 601 via conduits 606. The extrusion section 605 includes a hydraulic oil extruder. Extruding the extrusion section 605 causes hydraulic oil to be discharged; this is prior art and will not be described in detail here. When the hydraulic oil extruder is compressed, the hydraulic oil inside it enters the cavity 602 through the conduit 606 to push against the first sealing block 603.

[0072] An elastic element 607 is provided inside the cavity 602. One end of the elastic element 607 is connected to the mounting base 601, and the other end is connected to the first sealing block 603. The elastic element 607 includes a spring.

[0073] The secondary support member 403 is provided with a clearance groove 7 corresponding to the limit frame 604. The clearance groove 7 is located in a position corresponding to the vertical part of the limit frame 604.

[0074] In use, when the height of the secondary support member 403 located at the higher position is lowered by the pusher 402 so that the two secondary support members 403 return to a horizontal state, the secondary support member 403 located at the higher position squeezes the squeezing part 605 so that the hydraulic oil inside it enters the cavity 602 corresponding to the other secondary support member 403 through the conduit 606, specifically the area below the first sealing block 603, so that the hydraulic oil pushes against the first sealing block 603, thereby driving the limit frame 604 to form a block on the side of the vehicle and prevent the vehicle from slipping.

[0075] Specifically:

[0076] by Figure 6 For example, assuming that the secondary support 403 corresponding to area A is higher than the secondary support 403 corresponding to area B, the system controls the pusher 402 of area A to contract, so that the secondary support 403 of area A moves down. During its downward movement, it simultaneously squeezes the extrusion part 605, so that the medium (hydraulic oil) in the extrusion part 605 is injected into the mounting seat 601 corresponding to area B through the conduit 606. After the medium enters the cavity 602, it pushes the first sealing block 603 in the mounting seat 601 of area B. The first sealing block 603 pushes the limit frame 604 upward through the connecting rod. The vertical part of the limit frame 604 extends out of the relief groove 7 and forms a block on the side of the vehicle to prevent it from slipping.

[0077] When the secondary support 403 in area A moves down, the limiting frame 604 in area A is stationary. As a result, when the secondary support 403 moves down, the limiting frame 604 in area A will extend into the clearance groove 7 and block the other side of the vehicle to prevent it from slipping.

[0078] Example 3

[0079] Although the above embodiment uses the extrusion part 605 and the limiting bracket 604 to form a barrier on the side of the vehicle to prevent slippage, in actual application, the main reason for the misalignment of the secondary support member 403 is excessive wear of the hydraulic system, leading to the failure of the seal inside the cylinder, causing hydraulic oil to leak from the high-pressure chamber into the low-pressure chamber, thereby reducing the thrust on one side. This does not solve the core problem, resulting in misalignment recurring during subsequent lifting due to the same reason. Therefore, a technical improvement is made based on embodiment two, and the improved technical solution is as follows:

[0080] Reference Figures 1 to 9 As shown, the present invention provides an automobile maintenance lifting device. The piston rod 304 has a channel 305 inside, which is connected to a sealing cavity 306 disposed in the piston 302. The sealing cavity 306 is connected to the sealing element 303.

[0081] The bottom of the mounting base 601 is provided with an inlet hole, which is connected to the channel 305 through a flexible hose 10; the flexible hose 10 is provided with an electromagnetic on / off valve.

[0082] A connector 8 is provided below the first sealing block 603, and a sealing block 9 is provided at the bottom of the connector 8. The sealing block 9 is used to seal the inlet hole.

[0083] Under normal circumstances, the electromagnetic on / off valve is in the closed state to prevent the cavity 602 from connecting with the channel 305 and affecting the sealing performance of the seal 303.

[0084] In use, when the difference between the two secondary support members 403 exceeds the set value, the control system initiates the leveling operation of the secondary support member 403. Specifically, by controlling the pusher 402 corresponding to the secondary support member 403 located at the higher position to retract, the secondary support member 403 is pressed against the extrusion part 605, causing the limit bracket 604 corresponding to the secondary support member 403 at the lower position to extend out of the clearance groove 7, forming a blockage on the vehicle side to prevent it from slipping.

[0085] After the control system starts the leveling operation of the secondary support 403, it controls the opening of the solenoid on / off valve corresponding to the secondary support 403 at the lower position, thereby connecting the channel 305 corresponding to the secondary support 403 at the lower position to the cavity 602 corresponding to the secondary support 403 at the lower position through the hose 10.

[0086] When the secondary support 403, located at a high position, squeezes the extrusion section 605, the medium inside the extrusion section 605 enters the cavity 602 through the conduit 606. Specifically, the medium enters the area below the first sealing block 603. After entering the cavity 602, the medium pushes against the first sealing block 603, causing it to move upward.

[0087] During the movement of the first sealing block 603, the connecting piece 8 drives the sealing block 9 to move upward synchronously, so that the sealing block 9 releases the blockage of the inlet hole. At this time, some medium can enter the channel 305 in the piston rod 304 through the hose 10. The channel 305 transports the medium to the sealing cavity 306. Since the sealing cavity 306 is connected to the sealing element 303, the medium can drive the sealing element 303 to expand, so as to make up for the wear between the sealing element 303 and the cylinder 301 and avoid oil leakage during subsequent lifting.

[0088] After the leveling operation is completed, the solenoid on / off valve is closed to prevent pressure fluctuations in cavity 602 during subsequent lifting, which could cause secondary changes in the expansion of piston 302.

[0089] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A car maintenance lifting device, comprising symmetrically arranged bases (1), each base (1) having a lifting frame (2) above it, characterized in that: The hydraulic unit (3) is connected at one end to the lifting frame (2) and at the other end to the base (1). When it extends or retracts, it drives the lifting frame (2) to perform lifting operations. The support device (4) includes a main support member (401) connected to the lifting frame (2), a pusher (402) is provided on the top of the main support member (401), and a secondary support member (403) is provided at the output end of the pusher (402). A height detection component (5) is set on the opposite side of the two secondary supports (403) to detect whether the two secondary supports (403) are on the same plane.

2. The vehicle repair lifting device according to claim 1, characterized in that: The height detection component (5) includes a light emitter (501) and a light receiver (502) respectively disposed on opposite sides of two secondary supports (403), and the light receiver (502) is arrayed along the height direction of the secondary supports (403).

3. The automobile repair lifting device according to claim 2, characterized in that: A limiting device (6) is provided between the main support member (401) and the secondary support member (403). The limiting device (6) achieves vehicle limiting operation by forming a support block on the side of the vehicle when the vehicle is tilted.

4. The automobile repair lifting device according to claim 3, characterized in that: The limiting device (6) includes: Mounting base (601) is symmetrically arranged on the top of main support member (401) and has a cavity (602) inside. The first sealing block (603) is located inside the cavity (602) and can move axially along the cavity (602); The limiting bracket (604) is connected to the first sealing block (603) via a connecting rod. When the first sealing block (603) moves upward along the cavity (602) axially, it forms a support block on the side of the vehicle. The extrusion section (605) is symmetrically arranged on the top of the main support (401) and is connected to the corresponding mounting base (601) through the conduit (606).

5. The automobile repair lifting device according to claim 4, characterized in that: The cavity (602) is provided with an elastic element (607), one end of which is connected to the mounting base (601) and the other end is connected to the first sealing block (603).

6. The automobile repair lifting device according to claim 4, characterized in that: The secondary support (403) is provided with a relief groove (7) corresponding to the limiting frame (604).

7. The automobile repair lifting device according to claim 4, characterized in that: The hydraulic unit (3) includes a cylinder (301) rotatably connected to the base (1), a piston (302) is provided inside the cylinder (301), a seal (303) is provided on the outside of the piston (302), and the piston (302) is rotatably connected to the lifting frame (2) through a piston rod (304); the extension and retraction of the piston rod (304) is achieved by injecting / discharging hydraulic oil into the cylinder (301).

8. The automobile repair lifting device according to claim 7, characterized in that: The piston rod (304) has a channel (305) inside, which is connected to a sealing cavity (306) provided in the piston (302), and the sealing cavity (306) is connected to the sealing element (303).

9. The automobile repair lifting device according to claim 8, characterized in that: The bottom of the mounting base (601) is provided with an access hole, which is connected to the channel (305) through a flexible hose (10); A connector (8) is provided below the first sealing block (603), and a sealing block (9) is provided at the bottom of the connector (8). The sealing block (9) is used to seal the inlet hole.

10. The automobile repair lifting device according to claim 9, characterized in that: The hose (10) is equipped with an electromagnetic on / off valve.

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