lift

Abstract

To provide a lift that makes it easy to load a vehicle onto a work platform, reduces its volume, and reduces the space it occupies. [Solution] The lift according to the present invention includes a base frame (1) and a work platform (2), both of which are supported by two symmetrically arranged support rod sets (31). Each support rod set has two support rods pivoted across a pivot shaft (32). One end of one support rod is pivoted to the base frame and the other end is slidably abutting the work platform, while the other support rod is pivoted to the work platform and the other end is slidably abutting the base frame. A lifting member (4) is pivoted to the pivot shaft and has a first end (41) and a second end (42) located on either side of the pivot shaft. When the lifting member approaches the base frame, the second end is supported on the base frame, and the first end is pressed by a hydraulic cylinder (5), pushing the two support rods to pivot toward each other and supporting the work platform.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION The present invention relates to lifting equipment, and more particularly to vehicle lifts. [Background technology]

[0002] In automobile and motorcycle repair shops, lifts are used to raise vehicles to make it easier for repair workers to inspect and service the vehicles. Conventional patent documents, such as Patent Document 1, disclose a lift that has a base and a work platform, with two intersecting support frames pivotally installed between the two, one of which is supported by a hydraulic cylinder, and supports the work platform. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Taiwan Registered Utility Model No. 327397 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional lifts, when in standby mode, the platform is spaced a certain height from the base, as shown in Figure 10 of Patent Document 1, so it cannot be placed directly on the ground, otherwise it would be difficult to load a vehicle onto the platform. Therefore, a depression must be made in the ground, the lift must be placed in the depression, and when in standby mode, the platform must be leveled to the ground. However, this method requires consideration of whether the work environment is suitable for installation, and creating the depression requires additional costs, making it inconvenient.

[0005] In addition, in the actual process, the hydraulic cylinder of a conventional lift is subjected to a large amount of pressure, and when the work platform is overloaded, the hydraulic cylinder cannot withstand the load and loses its supporting function, causing the work platform to fall instantly, threatening the safety of personnel.

[0006] Therefore, the inventors of the present invention believed that the above drawbacks could be improved, and after extensive research, they came up with the present invention, which effectively improves the above issues through rational design.

[0007] The present invention was developed in consideration of the above-mentioned problems through intensive research by the inventor, and its purpose is to provide a lift. In other words, when the platform of the lift of the present invention is in standby mode, it can be lowered to a position close to the ground, making it easier to load a vehicle onto the platform. Furthermore, by lowering the standby height, the present invention achieves the effect of reducing volume and occupying less space. [Means for solving the problem]

[0008] In order to achieve the above object, the lift according to one aspect of the present invention comprises: A base frame; a workbench installed above the base frame; a support structure including two symmetrically installed support rod sets, each of the support rod sets having a first support rod and a second support rod, the first support rod and the second support rod being pivoted to each other via a pivot shaft, one end of the first support rod being pivoted to the base frame and the other end being slidably abutted against the work table, one end of the second support rod being pivoted to the work table and the other end being slidably abutted against the base frame, and a crossbar being installed between the two first support rods at a location close to the base frame; a lifting member pivotally mounted on the pivot shaft of each of the two support rod sets, the lifting member having a first end and a second end on either side of the pivot shaft, the second end being supported on the base frame when the lifting member is positioned close to the base frame; two connecting members pivotally mounted on both sides of the first end of the lifting member, the two connecting members each having a slot fitted over a boss of the two second support rods; a hydraulic cylinder having one end attached to the crossbar and the other end attached to the first end of the lifting member, the hydraulic cylinder being pressed against the first end of the lifting member to push the first support rod and the second support rod so as to pivot oppositely, and supporting the work platform; a backstop assembly member arranged in parallel near the hydraulic cylinder, the backstop assembly member having a base attached to the crossbar, a support column attached to the base that is extendable and slidable relative to the base, one end of the support column that is away from the base is connected to the first end of the lifting member, and a one-way gear is formed on the support column, the one-way gear is attached to a locking member on the base so as to be engaged in one direction, and the backstop assembly member allows the support column to extend only in the direction away from the base.

[0009] Preferably, rollers are provided on both sides of the second end of the lifting member.

[0010] Preferably, the locking member is pulled by a return spring and engaged with the one-way gear in one direction, and the locking member is connected to a knob, and the one-way engagement state of the locking member with the one-way gear can be released by rotating the knob.

[0011] At least the following points will become clear from the description and drawings to be described later. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view of a lift according to a first embodiment of the present invention; [Figure 2] 1 is a schematic diagram showing the operation of the lift according to the first embodiment of the present invention; [Figure 3] 1 is a schematic diagram showing the operation of the lift according to the first embodiment of the present invention; [Figure 4]1 is a schematic diagram showing the operation of the lift according to the first embodiment of the present invention; [Figure 5] FIG. 2 is a partial enlarged view showing a lift according to a second embodiment of the present invention. [Figure 6] 1 is a schematic plan view of a lift according to a second embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described below with reference to the accompanying drawings, in which: FIG. 1 is a block diagram of a conventional optical fiber cable; FIG. 2 is a block diagram of a conventional optical fiber cable;

[0014] (First Example) Figure 1 is a perspective view of a lift according to a first embodiment of the present invention. Figure 2 is a schematic diagram showing the operation of the lift according to the first embodiment of the present invention. Figure 3 is a schematic diagram showing the operation of the lift according to the first embodiment of the present invention. Figure 4 is a schematic diagram showing the operation of the lift according to the first embodiment of the present invention.

[0015] The lift according to the first embodiment of the present invention comprises a base frame 1 and a work platform 2. The work platform 2 is supported by a support structure 3, and the support structure 3 is operable to change the height to which the work platform 2 is raised.

[0016] The support structure 3 includes two support rod sets 31 symmetrically installed on both sides of the base frame 1 and the workbench 2. Each support rod set 31 includes a first support rod 311 and a second support rod 312, which are pivotally connected to each other via a pivot shaft 32. One end of the first support rod 311 is pivotally connected to the base frame 1, and the other end is slidably abutted against the workbench 2. One end of the second support rod 312 is pivotally connected to the workbench 2, and the other end is slidably abutted against the base frame 1. In this way, the height of each support rod set 31 is changed by the first support rod 311 and the second support rod 312 pivoting oppositely, and the height at which the workbench 2 is supported is also adjusted. A crossbar 313 is installed between the two first support rods 311, and the crossbar 313 is located in the vicinity of the base frame 1.

[0017] Furthermore, a lifting member 4 is installed between the two support rod sets 31. In this embodiment, the lifting member 4 is a cylindrical frame body, the left and right sides of which are pivotally mounted on the pivot shafts 32 of the two support rod sets 31, respectively. The upward and downward opening sides of the lifting member 4 are located on both sides of the pivot shaft 32, and are defined as a first end 41 and a second end 42, respectively. When the heights of the two support rod sets 31 are low, the position of the lifting member 4 also follows and moves closer to the base frame 1. At this time, the second end 42 of the lifting member 4 is supported by the base frame 1. Furthermore, since the lifting member 4 is pivotally mounted on the two pivot shafts 32, the first end 41 and the second end 42 can pivot relative to the pivot shafts 32.

[0018] The height of the two support rod sets 31 and the pivotal movement of the lifting member 4 are achieved by the operation of a hydraulic cylinder 5. Specifically, one end of the hydraulic cylinder 5 is pivotally mounted on the crossbar 313, and the other telescopic end is fixed to the first end 41 of the lifting member 4. When the hydraulic cylinder 5 is operated to telescope, it drives the first end 41 to rotate the lifting member 4 and also drives the second end 42. A backstop assembly 6 is further provided in the vicinity of the hydraulic cylinder 5. The backstop assembly 6 is mounted on the crossbar 313 and has a hollow sleeve-shaped base 61. A support column 62 is mounted in the base 61 and is capable of telescoping and sliding relative to the base 61. The support column 62 is connected to the first end 41 of the lifting member 4 via one end spaced apart from the base 61, and a one-way gear 621 is formed on the support column 62. A hook-shaped locking member 63 is installed on the base, and the locking member 63 is engaged in one direction with the one-way gear 621 by being pulled by a return spring 64. In this way, the support 62 is restricted to be able to extend only in the direction away from the base 61, and the locking member 63 is further connected to a knob 65. By rotating the knob 65, the locking member 63 can be driven to disengage from the one-way gear 621, thereby releasing the one-way engagement state of the locking member 63 with the one-way gear 621.

[0019] Meanwhile, connecting members 7 are pivotally mounted on both the left and right sides of the first end 41 of the lifting member 4, and each connecting member 7 is provided with an elongated hole 71. Each second support rod 312 is provided with a boss 314. Each connecting member 7 has its elongated hole 71 fitted onto the boss 314 of the corresponding second support rod 312, thereby forming a traction effect.

[0020] With the above-described structure, when the present invention is in a standby state, i.e., when the work platform is not supported, as shown in Fig. 2, the length of the hydraulic cylinder 5 is shortened to drive the lifting member 4, lower the height of the pivot shaft 32, and pivot the first support rod 311 and the second support rod 312 to lower the height of each support rod set 31, thereby lowering the height of the work platform 2. At this time, the first support rod 311, the second support rod 312, the lifting member 4, and the hydraulic cylinder 5 form a substantially horizontal installation state, and the work platform 2 is lowered to a position very close to the base frame 1, significantly shortening the distance to the ground level and making it easier to load a vehicle onto the work platform 2.

[0021] 3, in the process of raising the workbench 2, the hydraulic cylinder 5 is operated to extend, thereby pressing against the first end 41 of the lifting member 4, and at this time, the support column 62 of the backstop assembly member 6 is extended in a direction away from the base 61, and the lifting member 4 is pivoted about the pivot shaft 32 by the pressing action of the hydraulic cylinder 5. At this time, as the second end 42 is supported by the base frame 1, the first end 41 of the lifting member 4 is pushed up by the hydraulic cylinder 5, driving the pivot shaft 32 to raise the position of the pivot shaft 32, and the first support rod 311 and the second support rod 312 pivot to raise the height of each support rod set 31, thereby raising the height of the workbench 2.

[0022] After the workbench 2 is pushed up to a certain height, the second end 42 of the lifting member 4 detaches from the base frame 1 and comes to a stop, as shown in Fig. 4. At this time, the hydraulic cylinder 5 continues to press against the first end 41 of the lifting member 4, and the first end 41 is pulled by the connecting member 7, causing the lifting member 4 to stop pivoting. The pushing force of the hydraulic cylinder 5 generates a direct pushing action on each pivot shaft 32, causing the first support rod 311 and the second support rod 312 to pivot so as to raise the height of each support rod set 31, and the height of the workbench 2 continues to rise. In addition, after the work platform 2 is raised to the required height, the one-way engagement between the one-way gear 621 of the backstop assembly member 6 and the locking member 63 provides additional auxiliary support for the work platform 2, not only to share the load of the hydraulic cylinder 5, but also to reliably prevent the work platform 2 from suddenly falling when the hydraulic cylinder 5 fails, which may cause a safety problem.

[0023] In addition, the user can lower the height of the workbench 2 simply by rotating the knob 65 to release the one-way engagement of the locking member 63 with the one-way gear 621, and then controlling the hydraulic cylinder 5 to contract. In addition, in the process of lowering the workbench 2, the second end 42 of the lifting member 4 supported by the base frame 1 shares the output of the hydraulic cylinder 5, thereby reducing the load on the hydraulic cylinder 5 and achieving the effect of making the operation of the hydraulic cylinder 5 smoother, and preventing the hydraulic cylinder 5 from losing its supporting function due to excessive load.

[0024] (Second Example) Figure 5 is a partial enlarged view of a lift according to a second embodiment of the present invention, and Figure 6 is a schematic plan view of a lift according to the second embodiment of the present invention.

[0025] This embodiment differs from the first embodiment described above in that rollers 43 are installed on both the left and right sides of the second end 42 of the lifting member 4, and the rollers 43 can assist the sliding state between the second end 42 of the lifting member 4 and the base frame 1, making the lifting and lowering of the workbench 2 even smoother.

[0026] It should be noted that when the hydraulic cylinder 5 drives the first end 41 so that the lifting member 4 pivots relative to the support rod set 31 via the pivot shaft 32, the second end 42 (which may or may not have a roller 43) acts as a fulcrum, causing the second end 42 to contact the base frame 1, causing the work platform 2 to rise smoothly and slowly, and once the second end 42 is released from the base frame 1, the work platform 2 can rise quickly, and the backstop assembly 6 provides a support function and assists the hydraulic cylinder 5 under pressure, preventing the work platform 2 from descending uncontrollably.

[0027] When the work platform 2 is lowered, the second end 42 does not contact the base frame 1. At this time, the operation of the hydraulic cylinder 5 causes the work platform 2 to descend at high speed, and after the second end 42 contacts the base frame 1, the second end 42 acts as a fulcrum, causing the work platform 2 to descend smoothly and slowly. In this way, the functions of "initial: smoothly rising → later: fast rising" and "initial: fast descent → later: smoothly and slowly descent" of the work platform 2 are achieved, ensuring the safety of the movement of the work platform 2 and providing an effective backstop support function for the backstop assembly member 6.

[0028] Although the embodiment of the present invention has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like are also included within the scope of the present invention without departing from the gist of the present invention. [Explanation of symbols]

[0029] 1 base frame 2 workbenches 3 Support structure 31 Support rod set 311 First support rod 312 Second support rod 313 Crossbar 314 Boss 32 pivot shaft 4 Lifting member 41 First end 42 Second end 43 Roller 5 hydraulic cylinders 6 Backstop Assembly 61 base 62 Pillar 621 One-Way Gear 63 Locking member 64 Return spring 65 Knob 7 Connecting members 71 slotted hole

Claims

1. A base frame; a workbench installed above the base frame; a support structure including two symmetrically arranged support rod sets, each of the support rod sets having a first support rod and a second support rod, the first support rod and the second support rod being pivoted to each other via a pivot shaft, one end of the first support rod being pivoted to the base frame and the other end being slidably abutted against the work table, one end of the second support rod being pivoted to the work table and the other end being slidably abutted against the base frame, and a crossbar being installed between the two first support rods at a location close to the base frame; a lifting member pivotally mounted on the pivot shaft of each of the two support rod sets, the lifting member having a first end and a second end on either side of the pivot shaft, the second end being supported on the base frame when the lifting member is positioned close to the base frame; two connecting members pivotally mounted on both sides of the first end of the lifting member, the two connecting members each having an elongated hole fitted onto a boss of the two second support rods; a hydraulic cylinder having one end attached to the crossbar and the other end attached to the first end of the lifting member, the hydraulic cylinder being pressed against the first end of the lifting member to push the first support rod and the second support rod so as to pivot oppositely, and supporting the work platform; a backstop assembly member arranged in parallel near the hydraulic cylinder, the backstop assembly member having a base attached to the crossbar, a support column attached to the base that is telescopic and slidable relative to the base, one end of the support column that is away from the base is connected to the first end of the lifting member, and a one-way gear is formed on the support column, the one-way gear is attached to a locking member on the base so as to be engaged in one direction, and the backstop assembly member allows the support column to extend only in the direction away from the base.

2. The lift according to claim 1 , wherein rollers are respectively installed on both sides of the second end of the lifting member.

3. The lift according to claim 1, wherein the locking member is pulled by a return spring and engaged with the one-way gear in one direction, the locking member is connected to a knob, and the one-way engagement state of the locking member with the one-way gear can be released by rotating the knob.

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