Oil way failure safety device of gas protection lifting machine

Abstract

The utility model discloses an oil way failure safety device of a gas protection lifting machine. The oil way failure safety device comprises a lifting machine folding frame and a lower sleeve frame, a device assembling component, an unlocking component and a locking and braking component are arranged on the lower sleeve frame; the utility model relates to the technical field of failure protection of a gas protection lifting machine, and has the following beneficial effects that the locking and braking assembly is arranged on the folding frame of the lifting machine, so that when a hydraulic push rod on the folding frame fails, auxiliary supporting operation can be carried out on the descending and contracting folding frame, the folding frame is suddenly stopped, and the safety of the lifting machine is ensured. In the process, sudden stop protection is completed in a pure mechanical structure transmission mode, and therefore safety protection can be conducted on the lifting machine folding frame on the basis that it is guaranteed that the safety device does not break down.

Description

Technical Field

[0001] The utility model relates to the technical field of malfunction protection of vehicle maintenance lifts, in particular to a safety device for the oil circuit malfunction of vehicle maintenance lifts. Background Art

[0002] A vehicle maintenance lift is a special mechanism for lifting vehicles to lift the vehicle. However, the folding frame of the lift usually uses a hydraulic cylinder for driving. Once a fault occurs in the oil circuit of the hydraulic cylinder, the cylinder will no longer be able to provide support force for the folding frame, resulting in the automatic descent and contraction of the folding frame, which will cause unnecessary danger. Most of the existing inductive safety protection devices require electric drive, so it is impossible to ensure that the safety protection device itself does not malfunction during an accident. Therefore, there are also hidden dangers when using conventional safety protection devices. Therefore, we have designed a safety device for the oil circuit malfunction of vehicle maintenance lifts. Content of the Utility Model

[0003] To achieve the above objectives, the present utility model is realized through the following technical solutions: A safety device for the oil circuit malfunction of a vehicle maintenance lift, including a lift folding frame and a lower sleeve frame; a device assembly component and a locking and braking component are provided on the lower sleeve frame.

[0004] Among them, the device assembly component includes: a hydraulic push rod, a push rod shaft frame, a third bolt hole, a bushing hole, a third bolt, a central lock plate, a central shaft, a connecting sleeve, an upper sleeve frame, a first bolt hole, and a first bolt;

[0005] The push rod shaft frame is installed on the lift folding frame through the central shaft. The hydraulic push rod is installed at the bottom of the lift folding frame. The connecting sleeve is sleeved on the push rod shaft frame and connected to the telescopic end of the hydraulic push rod. The first bolt hole is opened on the lower sleeve frame and the upper sleeve frame. The upper sleeve frame is assembled with the lower sleeve frame through the first bolt. After the lower sleeve frame and the upper sleeve frame are matched, they are sleeved on the rotating shaft of the lift folding frame. The bushing hole is opened on the central lock plate. The central lock plate is sleeved on the push rod shaft frame through the bushing hole. The third bolt hole is opened on the lower sleeve frame and is provided in two groups. The third bolt is installed into the third bolt hole and extends into the adjustment hole to install the central lock plate.

[0006] Preferably, the locking and braking component includes: a top block, an adjustment hole, a support fixing plate, a card shaft groove, a support lever, a connecting shaft, a second bolt hole, a second bolt, and a lever connecting spring;

[0007] The supporting fixed plate is installed on the lifting machine folding frame. The card shaft groove is opened on the lower sleeve frame. The supporting lever is connected and installed in the card shaft groove through a connecting shaft. The second bolt holes are opened on the upper sleeve frame, the lower sleeve frame and the supporting lever. The second bolts are installed in the second bolt holes. The lever connecting spring is sleeved between the second bolts. The top block is installed on the connecting shaft. The adjusting hole is opened on the central lock plate.

[0008] Preferably, the diameter of the third bolt hole and the third bolt is the same as the width of the adjusting hole.

[0009] Beneficial effects

[0010] The safety device for the failure of the oil circuit of the vehicle maintenance lifting machine has the following beneficial effects:

[0011] In this case, by installing a locking and braking component on the folding frame of the lifting machine, when the hydraulic push rod on the folding frame fails, it can assist in supporting the descending and contracting folding frame, making the folding frame stop suddenly. And the process is completed by the transmission method of a pure mechanical structure, so as to carry out safety protection on the folding frame of the lifting machine on the basis of ensuring that the safety device itself does not fail. Brief description of the drawings

[0012] Figure 1 It is a three-dimensional external structure schematic diagram of the installation position of the safety device for the failure of the oil circuit of the vehicle maintenance lifting machine described in the present utility model.

[0013] Figure 2 It is a three-dimensional enlarged structure schematic diagram of the safety device for the failure of the oil circuit of the vehicle maintenance lifting machine described in the present utility model.

[0014] Figure 3 It is a front view structure schematic diagram of the safety device for the failure of the oil circuit of the vehicle maintenance lifting machine described in the present utility model.

[0015] Figure 4 It is a three-dimensional split structure schematic diagram of the safety device for the failure of the oil circuit of the vehicle maintenance lifting machine described in the present utility model.

[0016] Figure 5 It is a three-dimensional split structure schematic diagram of the safety device for the failure of the oil circuit of the vehicle maintenance lifting machine described in the present utility model.

[0017] Figure 6 It is a three-dimensional structure schematic diagram of the supporting lever of the safety device for the failure of the oil circuit of the vehicle maintenance lifting machine described in the present utility model.

[0018] In the figure: 1. Lifting machine folding frame; 2. Lower sleeve frame; 3. Hydraulic push rod; 4. Push rod shaft frame; 5. Bush hole; 6. Third bolt hole; 7. Third bolt; 8. Central lock plate; 9. Central shaft; 10. Connecting sleeve; 11. Upper sleeve frame; 12. Lever connecting spring; 13. First bolt hole; 14. First bolt; 15. Top block; 16. Adjusting hole; 17. Support fixing plate; 18. Shaft clamping groove; 19. Support lever; 20. Connecting shaft; 21. Second bolt hole; 22. Second bolt. Detailed implementation mode

[0019] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figure 1-6 , the present invention provides a technical solution.

[0021] The safety device for the failure of the oil circuit of the automotive maintenance lifting machine includes a lifting machine folding frame 1 and a lower sleeve frame 2; a device assembly component and a locking and braking component are provided on the lower sleeve frame 2.

[0022] Among them, the device assembly component includes: a hydraulic push rod 3, a push rod shaft frame 4, a third bolt hole 6, a bush hole 5, a third bolt 7, a central lock plate 8, a central shaft 9, a connecting sleeve 10, an upper sleeve frame 11, a first bolt hole 13 and a first bolt 14;

[0023] The push rod shaft frame 4 is installed on the lifting machine folding frame 1 through the central shaft 9, the hydraulic push rod 3 is installed at the bottom of the lifting machine folding frame 1, the connecting sleeve 10 is sleeved on the push rod shaft frame 4 and connected to the telescopic end of the hydraulic push rod 3, the first bolt hole 13 is opened on the lower sleeve frame 2 and the upper sleeve frame 11, the upper sleeve frame 11 is assembled with the lower sleeve frame 2 through the first bolt 14, the lower sleeve frame 2 and the upper sleeve frame 11 are sleeved on the rotating shaft of the lifting machine folding frame 1 after being matched, the bush hole 5 is opened on the central lock plate 8, the central lock plate 8 is sleeved on the push rod shaft frame 4 through the bush hole 5, the third bolt hole 6 is opened on the lower sleeve frame 2 and two groups are provided, and the third bolt 7 is installed into the third bolt hole 6 and extends into the adjusting hole 16 to install the central lock plate 8.

[0024] It should be noted that when the lifting machine starts to work, the hydraulic push rod 3 starts to extend and pushes the push rod shaft frame 4 through the connecting sleeve 10, and then drives the lifting machine folding frame 1 to start extending and working. The upper sleeve frame 11 is installed with the lower sleeve frame 2 through the position of the shaft hole groove. After the upper sleeve frame 11 and the lower sleeve frame 2 are matched, a hole groove with the same size as the joint rotating shaft of the folding frame will be combined, so as to facilitate the assembly and installation in front of the device. The size of the bush hole 5 is consistent with the shaft structure on the push rod shaft frame 4, which is convenient for the stable installation at the rear of the device.

[0025] Preferably, further, the locking brake assembly includes: a top block 15, an adjustment hole 16, a support fixing plate 17, a clamping shaft groove 18, a support lever 19, a connecting shaft 20, a second bolt hole 21, a second bolt 22, and a lever connecting spring 12;

[0026] The support fixing plate 17 is installed on the lifting machine folding frame 1, the clamping shaft groove 18 is opened on the lower sleeve 2, the support lever 19 is connected and installed in the clamping shaft groove 18 through the connecting shaft 20, the second bolt hole 21 is opened on the upper sleeve 11, the lower sleeve 2 and the support lever 19, the second bolt 22 is installed in the second bolt hole 21, the lever connecting spring 12 is sleeved between the second bolts 22, the top block 15 is installed on the connecting shaft 20, and the adjustment hole 16 is opened on the center lock plate 8.

[0027] It should be noted that under normal operation, when the folding frame contracts to the bottom, the support lever 19 will abut against the support fixing plate 17. Subsequently, the support lever 19 and the support fixing plate 17 will gradually approach each other. The support lever 19 will drive the connecting shaft 20 to rotate, and then drive the top block 15 on the connecting shaft 20 to swing, which can prevent the front end of the center lock plate 8 from interfering with the top block 15 after the folding frame contracts, resulting in the folding frame not being able to contract completely; when a failure occurs in the drive oil circuit of the hydraulic push rod 3, the lifting machine folding frame 1 will be affected by gravity and the mass of the vehicle above, and will start to automatically retract. During the retraction process, the folding frame will drive the push rod shaft frame 4 to swing through the connection of the central shaft 9 until it drives the center lock plate 8 to move inward through the adjustment hole 16, so that the center lock plate 8 abuts against the top block 15. Subsequently, the position of the support lever 19 can be fixed, and thus the lifting machine folding frame 1 can be locked, so that the lifting machine folding frame 1 will not continue to contract, thereby ensuring the safety of the vehicle above the lifting machine. After the function of the hydraulic push rod 3 is restored, the hydraulic push rod 3 will support the push rod shaft frame 4 again, so that the push rod shaft frame 4 swings back to the inclined state through the central shaft 9, and the center lock plate 8 moves outward in the adjustment hole 16, so that it can be disengaged from the top block 15, and then the folding frame can continue to be adjusted downward.

[0028] Preferably, further, the diameters of the third bolt hole 6 and the third bolt 7 are the same as the width of the adjustment hole 16.

[0029] It should be noted that since the third bolt 7 needs to support the center lock plate 8, and the diameter of the third bolt 7 is directly the same as the width of the adjustment hole 16, it can prevent the center lock plate 8 from shaking when it is adjusted through the adjustment hole 16.

[0030] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety device for oil circuit failure of an automobile maintenance lift, comprising a folding frame of the lift and a lower frame; characterized in that: The lower frame is provided with a device assembly component and a locking brake component; The device assembly assembly includes: a hydraulic push rod, a push rod shaft frame, a third bolt hole, a shaft sleeve hole, a third bolt, a center lock plate, a center shaft, a connecting sleeve, an upper sleeve frame, a shaft hole groove, a first bolt hole and a first bolt; The push rod shaft frame is installed on the lift folding frame through the center axis, the hydraulic push rod is installed at the bottom of the lift folding frame, the connecting sleeve is sleeved on the push rod shaft frame and connected to the telescopic end of the hydraulic push rod, the first bolt hole is opened on the lower sleeve frame and the upper sleeve frame, the upper sleeve frame is assembled with the lower sleeve frame through the first bolt, the lower sleeve frame is sleeved on the rotating shaft of the lift folding frame after matching with the upper sleeve frame, the sleeve hole is opened on the center lock plate, the center lock plate is sleeved on the push rod shaft frame through the sleeve hole, the third bolt hole is opened on the lower sleeve frame and two groups are set, the third bolt is installed in the third bolt hole and extends into the adjustment hole to install the center lock plate.

2. The oil circuit failure safety device for automobile maintenance and lifting machine according to claim 1 is characterized in that: The locking brake assembly comprises: a top block, an adjustment hole, a support fixing plate, a clamping shaft groove, a support lever, a connecting shaft, a second bolt hole, a second bolt and a lever connecting spring; The supporting fixing plate is installed on the folding frame of the lift, the axle groove is opened on the lower frame, the supporting lever is connected through the connecting shaft and installed in the axle groove, the second bolt hole is opened on the upper frame, the lower frame and the supporting lever, the second bolt is installed in the second bolt hole, the lever connecting spring is sleeved between the second bolts, the top block is installed on the connecting shaft, and the adjusting hole is opened on the center locking plate.

3. The oil circuit failure safety device for automobile maintenance and lifting machine according to claim 1 is characterized in that: The third bolt hole and the third bolt diameter are consistent with the width of the adjustment hole.

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