Vehicle lifting machine unlocking system and lifting height control method

Abstract

The invention aims at disclosing a vehicle lifting machine unlocking system and a lifting height control method, and relates to the technical field of vehicle lifting machines, the vehicle lifting machine unlocking system comprises two lifting platforms which synchronously lift and are arranged in parallel, and a first lifting assembly and a second lifting assembly are symmetrically arranged; the first lifting assembly comprises a first connecting rod assembly, a first hydraulic cylinder and a first locking assembly; the first hydraulic cylinder comprises a cylinder barrel, a telescopic rod and a U-shaped frame, a pull rope sensor is arranged at the end of the telescopic cylinder, a pull rope extending out of the pull rope sensor is connected to the cylinder barrel, and the first hydraulic cylinder always drives the lifting platform to ascend and descend through a first connecting rod assembly in an inclined mode. The locking air cylinder drives the second locking piece to be close to or away from the first locking piece, and the lifting device has the technical effects that the first hydraulic cylinder always drives the lifting platform to ascend and descend through the first connecting rod assembly in an inclined mode, and the lifting height of the lifting platform is controlled through the length of a pull rope; and locking or unlocking of the first hydraulic cylinder is achieved through the locking air cylinder, and the structure is reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lifts, and in particular to a vehicle lift unlocking system and a lifting height control method. Background Art

[0002] Vehicle lifts are indispensable equipment for repair and maintenance, and scissor lifts are one of them. When a scissor lift is used to lift a vehicle, on the one hand, the synchronization of the two lifting platforms is achieved through the cooperation of distance sensors and hydraulic oil circuits, and both the hydraulic oil circuits and unlocking systems are relatively complex. On the other hand, the operator can move in the front and rear directions of the vehicle, but is blocked by the scissor lift components in the left and right directions of the vehicle, which affects both the operator's passage and the operating space for replacing large parts.

[0003] In view of this, it is necessary to develop a vehicle lift unlocking system and a lift height control method to overcome the above defects. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to disclose a vehicle lift unlocking system and a lifting height control method.

[0005] A first object of the present invention is to provide a vehicle lift unlocking system.

[0006] A second object of the present invention is to provide a method for controlling the lifting height of a vehicle lift.

[0007] To achieve the above first invention objective, the present invention provides a vehicle lift unlocking system, comprising two lifting platforms that are synchronously lifted and arranged in parallel, a first lifting assembly and a second lifting assembly are respectively arranged at both ends of each lifting platform, and the first lifting assembly and the second lifting assembly are symmetrically arranged;

[0008] The first lifting assembly includes a first connecting rod assembly, a first hydraulic cylinder and a first locking assembly;

[0009] The second lifting assembly includes a second connecting rod assembly, a second hydraulic cylinder and a second locking assembly;

[0010] The first hydraulic cylinder includes a cylinder barrel, a telescopic rod and a U-shaped frame, a pull rope sensor is arranged at the end of the telescopic cylinder, and the pull rope extended from the pull rope sensor is connected to the cylinder barrel. The first hydraulic cylinder always drives the lifting platform to rise and fall in an inclined manner through the first connecting rod assembly;

[0011] The first locking assembly includes a first locking member, a second locking member and a locking cylinder. The first locking member is hinged to the first connecting rod assembly through a first hinge point, the second locking member is hinged to the first connecting rod assembly through a second hinge point, and the locking cylinder drives the second locking member to move closer to or away from the first locking member.

[0012] Preferably, the height between the lifting platform and the ground is H, and the extension length of the pull rope of the pull rope sensor is x, then H and x meet the following function:

[0013] H=-0.003x 2 +5.9644x+390.44.

[0014] Preferably, the lifting height of the lifting platform is Z, and the number of pulses of the pull rope sensor is y, then Z and y conform to the following function:

[0015] Z=0.0000000001266y 3 -0.0000045722127y 2 +0.1428957924525y+19.8074.

[0016] Preferably, the first locking members are respectively arranged on both sides of the U-shaped frame, and the first locking teeth are arranged on the first locking members.

[0017] Preferably, the second locking member comprises a U-shaped portion and a first arm and a second arm disposed on the U-shaped portion, wherein the first arm and the second arm are both hinged to the first connecting rod assembly;

[0018] The U-shaped portion straddles the U-shaped frame, and second locking teeth are respectively arranged on both sides of the U-shaped portion.

[0019] Preferably, a hollow portion and an L-shaped bracket are arranged on the side of the hollow portion in the U-shaped portion, and a micro switch is installed on the L-shaped bracket, and the micro switch is aligned with the U-shaped bracket.

[0020] Preferably, an upper limit travel switch is provided below the lifting platform.

[0021] Preferably, the angle between the first hydraulic cylinder and the horizontal plane is 16°-70°.

[0022] Preferably, the telescopic rod is parallel to the pull rope;

[0023] The hydraulic oil of the first lifting assembly and the second lifting assembly comes from the same hydraulic oil circuit.

[0024] Based on the same inventive principle, in order to achieve the above second inventive object, the present invention also provides a lifting height control method for a vehicle lift, wherein the lifting platform is driven by the first hydraulic cylinder and the second hydraulic cylinder which are inclined and symmetrically arranged;

[0025] The first hydraulic cylinder and the first pull rope sensor are designed to be parallel to each other, and the second hydraulic cylinder and the second pull rope sensor are designed to be parallel to each other;

[0026] The height between the lifting platform and the ground is H, the extension length of the first pull-wire sensor is x, and the extension length of the second pull-wire sensor is x. Then H and x meet the following function:

[0027] H=-0.003x 2 +5.9644x+390.44.

[0028] Compared with the prior art, the technical effects of the present invention are as follows:

[0029] (1) The lifting platform of the present invention comprises a first lifting assembly and a second lifting assembly, wherein the first lifting assembly and the second lifting assembly are symmetrically arranged, and the first hydraulic cylinder always drives the lifting platform to rise and fall in an inclined manner through the first connecting rod assembly. The length of the pull rope extended by the pull rope sensor indicates the stroke of the first hydraulic cylinder, and the lifting height of the lifting platform is controlled by the length of the pull rope. Since the two lifting platforms respectively adopt the symmetrically arranged first lifting assembly and the second lifting assembly, when the same pull rope sensor is adopted, the lifting height of the lifting platform can be controlled by the pull rope sensor, thereby maintaining the consistency of the lifting height.

[0030] (2) The locking cylinder drives the second locking member to move closer to or away from the first locking member. The locking of the first hydraulic cylinder is achieved by the second locking member moving closer to the first locking member. When the locking cylinder drives the second locking member away from the first locking member, the first hydraulic cylinder is unlocked. The locking or unlocking of the first hydraulic cylinder is achieved by the locking cylinder, and the structure is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the vehicle lift unlocking system of the present invention.

[0033] Figure 2It is a schematic diagram of the three-dimensional structure of the vehicle lift unlocking system of the present invention.

[0034] Figure 3 It is a three-dimensional structural schematic diagram of the first hydraulic cylinder of the present invention.

[0035] Figure 4 It is a three-dimensional structural schematic diagram of the first hydraulic cylinder of the present invention.

[0036] Figure 5 It is a three-dimensional structural schematic diagram of the first hydraulic cylinder of the present invention.

[0037] Figure 6 It is a schematic cross-sectional structural diagram of the first hydraulic cylinder of the present invention.

[0038] Figure 7 It is a schematic diagram of the three-dimensional structure of the first lifting assembly or the second lifting assembly of the present invention.

[0039] Figure 8 It is a schematic diagram of the main structure of the first lifting assembly or the second lifting assembly of the present invention.

[0040] Fig. 9 It is a schematic diagram of the hydraulic principle of the lifting platform of the present invention.

[0041] Fig.10 It is a schematic diagram of the three-dimensional structure of the vehicle lift unlocking system of the present invention.

[0042] Fig.11 The present invention Fig.10 A is an enlarged structural diagram of FIG.

[0043] Among them, 1. the first lifting assembly; 11. the first connecting rod assembly; 111. the first four-link assembly; 1111. the Y-shaped articulated rod; 1112. the X-shaped articulated rod; 112. the second four-link assembly; 113. the first support column; 114. the second support column; 115. the (first) pull rope sensor; 116. the pull rope; 12. the first hydraulic cylinder; 121. the cylinder barrel; 122. the telescopic rod; 123. the U-shaped frame; 13. the first locking assembly; 131. the first locking member; 1311. the first locking tooth; 132. the second locking member; 1321. the U-shaped portion; 1322. the first arm; 1323. the second arm; 1324. the second locking tooth; 1 325. hollow portion; 1326. L-shaped bracket; 1327. micro switch; 133. locking cylinder; 14. motor; 15. first hydraulic pump; 151. first hydraulic oil circuit; 152. connecting oil circuit; 16. second hydraulic pump; 161. second hydraulic oil circuit; 2. second lifting assembly; 21. second connecting rod assembly; 22. second hydraulic cylinder; 23. second locking assembly; 3. lifting platform; 31. first space; 32. second space; 33. reinforcement plate; 4. first hinge point; 5. second hinge point; 6. upper limit travel switch; 7. third hinge point; 8. fourth hinge point; 9. fifth hinge point; 10. sixth hinge point. DETAILED DESCRIPTION

[0044] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] Embodiment 1

[0047] Ginseng Figures 1 to 11 , this embodiment discloses a specific implementation of a vehicle lift unlocking system.

[0048] Vehicle lift unlocking system, see Figures 1 to 11, including two lifting platforms 3 that are synchronously lifted and arranged in parallel, a first lifting assembly 1 and a second lifting assembly 2 are respectively arranged at both ends of each lifting platform 3, and the first lifting assembly 1 and the second lifting assembly 2 are symmetrically arranged; the first lifting assembly 1 includes a first connecting rod assembly 11, a first hydraulic cylinder 12 and a first locking assembly 13; the second lifting assembly 2 includes a second connecting rod assembly 21, a second hydraulic cylinder 22 and a second locking assembly 23; the first hydraulic cylinder 12 includes a cylinder barrel 121, a telescopic rod 122 and a U-shaped frame 123, a pull rope sensor 115 is arranged at the end of the telescopic cylinder 122, and the pull rope sensor 115 is arranged at the end of the telescopic cylinder 122. The pull rope 116 extending from the rope sensor 115 is connected to the cylinder 121, and the first hydraulic cylinder 12 always drives the lifting platform 1 to rise and fall in an inclined manner through the first connecting rod assembly 11; the first locking assembly 13 includes a first locking member 131, a second locking member 132 and a locking cylinder 133, the first locking member 131 is hinged to the first connecting rod assembly 11 through a first hinge point 4, and the second locking member 132 is hinged to the first connecting rod assembly 11 through a second hinge point 5, and the locking cylinder 133 drives the second locking member 132 to approach or move away from the first locking member 131.

[0049] Specifically, see Figures 1 to 11 The first connecting rod assembly 11 includes a first four-link assembly 111 and a second four-link assembly 112 arranged in parallel, a first support column 113 and a second support column 114 are arranged between the first four-link assembly 111 and the second four-link assembly 112, a first hinge point 4 is located at the first support column 113, and a second hinge point 5 is located at the second support column 114. The first hydraulic cylinder 12 drives the second support column 114 to rise and fall with the first support column 113 as a fulcrum, thereby realizing that the first hydraulic cylinder 12 always drives the lifting platform 1 through the first connecting rod assembly 11 in an inclined manner When the lifting platform 3 is at the lowest position, the angle between the first hydraulic cylinder 12 and the horizontal plane is 16°-70°, and the telescopic rod 122 is parallel to the pull rope 116; when the lifting platform 3 is at the lowest position, the angle between the first hydraulic cylinder 12 and the horizontal plane is 16°; when the lifting platform 3 is at the highest position, the angle between the first hydraulic cylinder 12 and the horizontal plane is 70°; in order to achieve the height consistency between the two lifting platforms 3, the telescopic rod 122 is parallel to the pull rope 116, and the hydraulic oil of the first lifting assembly 1 and the second lifting assembly 2 comes from the same hydraulic oil circuit. See the hydraulic principle diagram Fig. 9, the motor 14 synchronously drives the first hydraulic pump 15 and the second hydraulic pump 16, the first hydraulic pump 15 drives the first hydraulic cylinder 12 through the first hydraulic oil circuit 151, and the second hydraulic pump 16 drives the second hydraulic cylinder 22 through the second hydraulic oil circuit 161. A connecting oil circuit 152 is set between the first hydraulic oil circuit 151 and the second hydraulic oil circuit 161 to make the pressure of the first hydraulic oil circuit 151 and the second hydraulic oil circuit 161 equal, thereby realizing the synchronous lifting of the first lifting component 1 and the second lifting component 2; in terms of controlling the height of the lifting platform 1, the following scheme is adopted: the height between the lifting platform 1 and the ground is H, the extended length of the rope 116 of the rope sensor 115 is x, then H and x meet the following function: H = -0.003x 2 +5.9644x+390.44; Another solution can be adopted. The lifting height of the lifting platform is Z, and the pulse number of the rope sensor 115 is y. The pulse number can determine the extension length of the rope 116. Then Z and y meet the following function: Z = 0.0000000001266y 3 -0.0000045722127y 2 +0.1428957924525y+19.8074; Through the above two schemes, each extended length of the pull rope 116 can correspond to a lifting height of the lifting platform 1. Since the first lifting component 1 and the second lifting component 2 adopt the same control scheme, the consistency of the lifting height of the lifting platform 1 is also guaranteed in terms of control.

[0050] See also Figures 3 to 6The working principle of the first locking assembly 13 is as follows: the first locking member 131 is respectively provided on both sides of the U-shaped frame 123, and the first locking tooth 1311 is provided on the first locking member 131; the second locking member 132 includes a U-shaped portion 1321 and a first arm 1322 and a second arm 1323 provided on the U-shaped portion 1321, the first arm 1322 and the second arm 1323 are both hinged to the second hinge point 5 of the first connecting rod assembly 111, and the second hinge point 5 is located at the second supporting column 114; the U-shaped portion 1321 straddles the U-shaped frame 123, and the second locking teeth 1324 are respectively provided on both sides of the U-shaped portion 1321; the U-shaped portion 1321 is provided A hollow portion 1325 and an L-shaped bracket 1326 arranged on the side of the hollow portion 1325, a micro switch 1327 is installed on the L-shaped bracket 1326, and the micro switch 1327 is aligned with the U-shaped frame 123; when the first locking tooth 1311 and the second locking tooth 1324 are close to each other and meshed, the micro switch 1327 is triggered to control the hydraulic system to stop supplying oil to the first hydraulic cylinder 12; when the first locking tooth 1311 and the second locking tooth 1324 are away from each other and disengaged, the micro switch 1327 controls the hydraulic system to supply or unload oil to the first hydraulic cylinder 12; the micro switch 1327 plays a role in detecting whether the first locking tooth 1311 and the second locking tooth 1324 are in a locked state.

[0051] See also Fig.10 and Fig.11 In the case where the height of the lifting platform 1 is controlled by the pull rope sensor 115, in order to further control its maximum stroke, an upper limit travel switch 6 is provided below the lifting platform 1; see Figure 7 and Figure 8 The first four-bar linkage assembly 111 and the second four-bar linkage assembly 112 are symmetrically designed. Taking the first four-bar linkage assembly 111 as an example, the first four-bar linkage assembly 111 includes a y-shaped hinged rod 1111 and an x-shaped hinged rod 1112. The y-shaped hinged rod 1111 and the x-shaped hinged rod 1112 are hinged to form a third hinge point 7 and a fourth hinge point 8. Figure 8 The y-shaped articulated rod 1111 has a fifth articulated point 9, and the x-shaped articulated rod 1112 has a sixth articulated point 10, wherein the connecting lines of the third articulated point 7, the fourth articulated point 8, the fifth articulated point 9 and the sixth articulated point 10 form a parallelogram a; only one end point of the y-shaped articulated rod 1111 is articulated to the ground, one end point of the x-shaped articulated rod 1112 is articulated to the lifting platform 3, and the other end point of the x-shaped articulated rod 1112 slides along the lifting platform 3; on the one hand, the two end points of the x-shaped articulated rod 1112 can expand the lifting range, thereby increasing the load of the lifting platform 3; on the other hand, when the other end point of the x-shaped articulated rod 1112 slides to the maximum stroke, the other end point of the x-shaped articulated rod 1112 touches the upper limit travel switch 6, thereby realizing the control of the maximum height of the lifting platform 3.

[0052] See also Figure 2 When the lifting platform 3 is in the lowest position, in order to minimize the height between the lifting platform 3 and the ground, a first space 31 and a second space 32 are respectively provided at the two ends below the lifting platform 3, the first space 31 accommodates the first lifting assembly 1 in a retracted state, and the second space 32 accommodates the second lifting assembly 2 in a retracted state; a reinforcing plate 33 is provided between the first space 31 and the second space 32; when the lifting platform 3 is in the highest position, the first space 31 is lifted by the deployed first lifting assembly 1, and the second space 32 is lifted by the deployed second lifting assembly 2; the reinforcing plate 33 can increase the lifting strength between the first space 31 and the second space 32, and will not affect the thickness of the lifting platform 3, so that the lifting platform 3 can achieve a greater load capacity while being as thin as possible.

[0053] Embodiment 2

[0054] This embodiment discloses a specific implementation of a lifting height control method of a vehicle lift.

[0055] The lifting height control method of the vehicle lift drives the lifting platform 3 by means of the inclined and symmetrically arranged first hydraulic cylinder 12 and the second hydraulic cylinder 22; the first hydraulic cylinder 12 and the pull rope 116 of the first pull rope sensor 115 are designed in parallel, and the second hydraulic cylinder 22 and the pull rope of the second pull rope sensor are designed in parallel; the height between the lifting platform 1 and the ground is H, the extended length of the pull rope 116 of the first pull rope sensor 115 is x, and the extended length of the pull rope of the second pull rope sensor is x, then H and x meet the following function: H = -0.003x 2 +5.9644x+390.44; or, the lifting height of the lifting platform is Z, the number of pulses of the first pull-wire sensor 115 is y, the number of pulses of the second pull-wire sensor 115 is y, and the number of pulses can determine the extension length of the pull-wire 116, then Z and y meet the following function:

[0056] Z=0.0000000001266y 3 -0.0000045722127y 2 +0.1428957924525y+19.8074; Through one of the above two schemes, each extended length of the pull rope 116 can correspond to a lifting height of the lifting platform 1. Since the first hydraulic cylinder 12 and the second hydraulic cylinder 22 adopt the same control scheme, the consistency of the lifting height of the lifting platform 1 is also guaranteed in terms of control.

[0057] The lifting height control method of the vehicle lift disclosed in this embodiment is used to control the vehicle lift unlocking system described in Embodiment 1. For the technical solutions having the same parts as those in Embodiment 1, please refer to Embodiment 1 and will not be described in detail here.

Claims

1. A vehicle lift unlocking system, characterized in that: It comprises two lifting platforms which are synchronously lifted and arranged in parallel, a first lifting assembly and a second lifting assembly are respectively arranged at two ends of each lifting platform, and the first lifting assembly and the second lifting assembly are symmetrically arranged; The first lifting assembly includes a first connecting rod assembly, a first hydraulic cylinder and a first locking assembly; The second lifting assembly includes a second connecting rod assembly, a second hydraulic cylinder and a second locking assembly; The first hydraulic cylinder includes a cylinder barrel, a telescopic rod and a U-shaped frame, a pull rope sensor is arranged at the end of the telescopic rod, and the pull rope extended from the pull rope sensor is connected to the cylinder barrel. The first hydraulic cylinder always drives the lifting platform to rise and fall in an inclined manner through the first connecting rod assembly; The first locking assembly includes a first locking member, a second locking member and a locking cylinder. The first locking member is hinged to the first connecting rod assembly through a first hinge point, the second locking member is hinged to the first connecting rod assembly through a second hinge point, and the locking cylinder drives the second locking member to move closer to or away from the first locking member.

2. The vehicle lift unlocking system according to claim 1, characterized in that: The height between the lifting platform and the ground is H, and the extension length of the pull rope of the pull rope sensor is x. Then H and x conform to the following function: H=-0.003x 2 +5.9644x+390.44。 3. The vehicle lift unlocking system according to claim 1, characterized in that: The lifting height of the lifting platform is Z, and the number of pulses of the pull rope sensor is y, then the relationship between Z and y conforms to the following function: Z=0.0000000001266y 3 -0.0000045722127y 2 +0.1428957924525y+19.8074。 4. The vehicle lift unlocking system according to any one of claims 1 to 3, characterized in that: The first locking members are respectively arranged on both sides of the U-shaped frame, and the first locking teeth are arranged on the first locking members.

5. The vehicle lift unlocking system according to claim 4, characterized in that: The second locking member includes a U-shaped portion and a first arm and a second arm disposed on the U-shaped portion, wherein the first arm and the second arm are both hinged to the first connecting rod assembly; The U-shaped portion straddles the U-shaped frame, and second locking teeth are respectively arranged on both sides of the U-shaped portion.

6. The vehicle lift unlocking system according to claim 5, characterized in that: The U-shaped portion is provided with a hollow portion and an L-shaped bracket provided on the side of the hollow portion, a micro switch is installed on the L-shaped bracket, and the micro switch is aligned with the U-shaped bracket.

7. The vehicle lift unlocking system according to any one of claims 1 to 3, characterized in that: An upper limit travel switch is arranged below the lifting platform.

8. The vehicle lift unlocking system according to any one of claims 1 to 3, characterized in that: The angle between the first hydraulic cylinder and the horizontal plane is 16°-70°.

9. The vehicle lift unlocking system according to any one of claims 1 to 3, characterized in that: The telescopic rod is parallel to the pull rope; The hydraulic oil of the first lifting assembly and the second lifting assembly comes from the same hydraulic oil circuit.

10. A method for controlling the lifting height of a vehicle lift, characterized in that: The lifting platform is driven by the first hydraulic cylinder and the second hydraulic cylinder which are arranged obliquely and symmetrically; The first hydraulic cylinder and the first pull rope sensor are designed to be parallel to each other, and the second hydraulic cylinder and the second pull rope sensor are designed to be parallel to each other; The height between the lifting platform and the ground is H, the extension length of the first pull-wire sensor is x, and the extension length of the second pull-wire sensor is x. Then H and x meet the following function: H=-0.003x 2 +5.9644x+390.44。

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