Vertical lifting V-shaped shear type lifting machine

Abstract

The vertical lifting V-shaped shear type lifting machine comprises two lifting platforms which are horizontally arranged in parallel and comprise a main platform and an auxiliary platform, and each lifting platform comprises a mother machine platform and two mother machine shear arm assemblies arranged at the bottom of the front end and the bottom of the rear end of the mother machine platform respectively; the mother machine shearing arm assembly comprises a mother machine upper auxiliary shearing arm assembly, a mother machine upper main shearing arm assembly, a connecting rod and a mother machine lower shearing arm assembly; the lower half portion of the auxiliary shear arm assembly on the mother machine, the lower half portion of the main shear arm assembly on the mother machine, the upper half portion of the lower shear arm assembly on the mother machine and the connecting rod form an equilateral parallelogram mechanism. Through the V-shaped shearing arms and the parallelogram mechanism, the problem that the cost is increased due to the fact that a lifting structure is unreasonable is solved, and meanwhile the lifting device has the advantages that the bottom passing space is large, the durability of a two-stage synchronous control system is good, shaking is avoided, and synchronous delay is avoided.

Description

Technical Field

[0001] The present invention relates to a lift, specifically a vertical lift. Background Art

[0002] Conventional large-scale scissor car lifts generally adopt an X-shaped scissor mechanical mechanism, including a platform, a base, and two sets of scissor arms connected in an X-shaped cross. The platform is lifted by the relative rotation of the two sets of scissor arms. The existing X-shaped scissor lifts have the following defects: 1. It is difficult to achieve vertical lifting. In the X-shaped scissor lifting mechanism, there are inner scissor arms and outer scissor arms. The scissor arms are the main load-bearing components. The cylinder block and rod head of the lifting drive device's oil cylinder must be installed on the inner scissor arm and the outer scissor arm respectively. If the platform is to be lifted vertically (i.e., the horizontal positions of the upper and lower support points coincide), the upper and lower parts of the scissor arm need to be of equal length, which will make it difficult to design and install the oil cylinder. At the same time, considering the rotational and sliding fits of the upper and lower ends of the scissor arm and other mechanical parts, the design with the upper and lower support points coinciding will inevitably result in a higher height of the lift after lowering. Therefore, in order to reduce the height after lowering and facilitate the design and installation of the oil cylinder, the length of the upper part of the scissor arm in the X-shaped scissor lifting mechanism is usually less than that of the lower part, resulting in horizontal movement during the platform's lifting and ultimately unable to achieve vertical lifting.

[0003] 2. Insufficient support stiffness. There are only two support points for the platform. When in the lowered state, they are located at positions about 1 / 3 of the total length from the front and rear ends respectively. However, one of the support points will gradually approach the other support point during lifting, resulting in a relatively long suspended length of the platform. When a car drives onto the platform, if the wheelbase is long, it will cause the two ends of the platform to bend and deform downward.

[0004] 3. The X-shaped scissor lifting mechanism occupies most of the space at the bottom of the platform, and operators and other equipment cannot pass through the bottom of the platform.

[0005] To solve the above problems, the Chinese utility model patent with the authorization announcement number CN222063986U proposed a vertical lift Y-shaped scissor lift. It achieved vertical lifting by using a Y-shaped mechanism at the front and rear ends, increased the number of support points, solved the problem of the suspended length, and also provided a larger bottom passage space. However, it still has the following problems in actual use: First, the structural force is unreasonable, resulting in increased costs. During lifting, the slider at the bottom of the large platform is subjected to a downward pulling force, and when lowering, it is subjected to an upward pushing force, which is opposite to the overall work direction of the lift. This not only exacerbates the wear of the slider but also increases the force loss of the oil cylinder. It is necessary to use relatively thick oil cylinders of 90mm (main) and 75mm (auxiliary) to ensure sufficient lifting force, increasing the cost.

[0006] Secondly, the scissors arms of the Y-shaped structure are relatively long, and when they rise to the high position, they still occupy the passage in the middle part of the platform, affecting the passability, etc.

[0007] On the other hand, for the main and auxiliary platform lifts with similar structures, the general leveling control systems are all based on the cooperative control scheme of wire rope sensors and oil supply solenoid valves, and there are problems such as easy damage, platform jitter, and synchronization delay. Specifically, the wire rope sensor collects the height information of the main platform or the stroke information of the oil cylinder, and then sends it to the single-chip microcomputer or the embedded industrial control computer system for data processing. According to the different height differences, the oil supply solenoid valves of the front and rear cylinders of the two platforms are respectively controlled to perform on-off actions, realizing oil supply or oil cut-off, and achieving the purpose of leveling the lifting height. Since the working environment of the lift product is often relatively harsh, there are many factors such as oil pollution, electromagnetic interference, and mechanical damage. The wire rope sensor is often prone to breakage and damage. Moreover, due to the delay characteristics of the hydraulic oil circuit, problems such as platform jitter and synchronization delay caused by oil pulsation are likely to occur during the adjustment process, reducing the user experience of using the equipment. Summary of the Invention

[0008] The present invention provides a vertical lifting V-shaped scissor lift, and its purposes are: 1. To solve the problem of unreasonable lifting structure leading to increased costs; 2. To further widen the passage space at the bottom of the platform; 3. To solve the problems of easy damage, jitter, and synchronization delay of the leveling system.

[0009] The technical solution of the present invention is as follows: A vertical lifting V-shaped scissor lift includes two parallel and horizontally arranged lifting platforms, namely a main platform and an auxiliary platform. The lifting platform includes a mother machine platform and two sets of mother machine scissor arm assemblies respectively arranged at the front and rear bottoms of the mother machine platform; The mother machine scissor arm assembly includes an upper auxiliary scissor arm assembly of the mother machine, an upper main scissor arm assembly of the mother machine, a connecting rod, and a lower scissor arm assembly of the mother machine; the upper end of the upper auxiliary scissor arm assembly of the mother machine is slidably connected to the bottom of the mother machine platform through a slider, the upper end of the upper main scissor arm assembly of the mother machine is rotatably connected to the mother machine platform, and the middle parts of the upper main scissor arm assembly of the mother machine and the upper auxiliary scissor arm assembly of the mother machine are rotatably connected; the upper end of the lower scissor arm assembly of the mother machine is rotatably connected to the lower end of the upper main scissor arm assembly of the mother machine, and the lower end of the lower scissor arm assembly of the mother machine is rotatably connected to the base assembly; the upper end of the connecting rod is rotatably connected to the lower end of the upper auxiliary scissor arm assembly of the mother machine, and the lower end is rotatably connected to the middle part of the lower scissor arm assembly of the mother machine; the lower half of the upper auxiliary scissor arm assembly of the mother machine, the lower half of the upper main scissor arm assembly of the mother machine, the upper half of the lower scissor arm assembly of the mother machine, and the connecting rod form an equilateral parallelogram mechanism; A mother machine oil cylinder is also installed on the mother machine scissor arm assembly. The lower end of the mother machine oil cylinder is rotatably connected to the base assembly, and the upper end is rotatably connected to the upper main scissor arm assembly of the mother machine.

[0010] As a further improvement of the vertical lifting V-type scissor lift: The base assembly includes a base body, a pressing plate, a fixing block, a slider shaft and a bearing; The base body is fixedly installed on the ground. The lower end of the lower scissor arm assembly of the main machine is connected to the fixing block through a bearing, and the fixing block is installed in the chute of the base body; The pressing plate is installed on the top of the base body for limiting the fixing block.

[0011] As a further improvement of the vertical lifting V-type scissor lift: A shock-absorbing block is also installed on the bottom plate of the base body, which is used to contact the main machine platform when it descends to the lowest position, playing a role in shock absorption and limiting.

[0012] As a further improvement of the vertical lifting V-type scissor lift: A main machine mechanical lock assembly is also installed on the main machine scissor arm assembly, which includes an upper main machine mechanical lock, a lower main machine mechanical lock and a main machine unlocking cylinder; The upper end of the upper main machine mechanical lock is rotatably connected to the upper end of the main machine oil cylinder, and a lock tooth block is provided at the lower end; The lower main machine mechanical lock is fixedly arranged relative to the main machine cylinder body of the main machine oil cylinder, and a rack for meshing with the lock tooth block is provided on the upper surface; The main machine unlocking cylinder is used to push the lock tooth block away from the rack.

[0013] As a further improvement of the vertical lifting V-type scissor lift: The main machine mechanical lock assembly also includes a main machine unlocking detection switch installed on the upper main machine mechanical lock, which is used to detect whether the lock tooth block leaves the rack and completes unlocking; Only when the states of all four sets of main machine unlocking detection switches are unlocked is the equipment allowed to lift.

[0014] As a further improvement of the vertical lifting V-type scissor lift: A set of secondary lifting platforms are respectively installed at the middle positions of the main machine platforms, which can be respectively used to support the single-side body of the car, facilitating the maintenance and replacement of the car tires; The secondary lifting platform includes a secondary lifting platform body, secondary lifting scissor arms and a secondary lifting and mechanical lock mechanism; A secondary lifting draw head is also provided on the secondary lifting platform body, which includes a front draw head and a rear draw head.

[0015] As a further improvement of the vertical lifting V-type scissor lift: A front protection mechanism is installed at the front end of the main machine platform, which includes a tubular guardrail, a support, fixing bolts and limit screws; The support is fixed to the front end of the main machine platform through fixing bolts; Side plates are respectively fixedly connected to both ends of the tubular guardrail, and upper and lower pins are provided on the side plates; The lower pin penetrates into the lower long hole of the support, and the upper pin is used to slide into the positioning groove at the top of the support. When switching the tubular guardrail to the horizontal state, lift the tubular guardrail upward by hand. The lower pin shaft slides along the long hole, and the upper pin shaft disengages from the positioning groove at the top of the support. At this time, rotate the tubular guardrail forward until it is horizontal and contact the limit screw installed on the support. When switching the tubular guardrail to the vertical state, lift the tubular guardrail upward and then rotate it, and then lower the tubular guardrail so that the pin shaft on its upper side inserts into the positioning groove.

[0016] As a further improvement of the vertical lifting V-type scissor lift: it further includes a secondary synchronization control system, and the secondary synchronization control system includes a synchronization oil cylinder; The synchronization oil cylinder includes a main cylinder body, a main cylinder piston, a piston connecting rod, a slave cylinder piston, a slave cylinder body and a connecting body; the main cylinder body is connected to the slave cylinder body through the connecting body. The main cylinder body and the connecting body form a first chamber, and the slave cylinder body and the connecting body form a second chamber; the main cylinder piston is located in the main cylinder body, dividing the first chamber into a first oil chamber and a second oil chamber; the slave cylinder piston is located in the slave cylinder body, dividing the second chamber into a third oil chamber and a fourth oil chamber; the main cylinder piston and the slave cylinder piston are fixedly connected through the piston connecting rod to achieve forced synchronous movement of the two pistons; the cross-sectional areas of the first oil chamber and the third oil chamber are equal; when high-pressure hydraulic oil enters the fourth oil chamber and the second oil chamber, it will drive the main cylinder piston and the slave cylinder piston to move upward synchronously. At this time, the hydraulic oil output from the first oil chamber and the third oil chamber is equal.

[0017] As a further improvement of the vertical lifting V-type scissor lift: the secondary synchronization control system further includes a hydraulic station; The hydraulic oil output end of the hydraulic station is connected to the second oil chamber and the fourth oil chamber. The first oil chamber is connected to the lower oil chamber of the master oil cylinder at one end of the main platform. The upper oil chamber of this end of the master oil cylinder is further connected to the lower oil chamber of the master oil cylinder at the other end of the main platform. The cross-sectional areas of the interconnected upper oil chamber and lower oil chamber are the same; the third oil chamber is connected to the lower oil chamber of the master oil cylinder at one end of the auxiliary platform. The upper oil chamber of this end of the master oil cylinder is further connected to the lower oil chamber of the master oil cylinder at the other end of the auxiliary platform. The cross-sectional areas of the interconnected upper oil chamber and lower oil chamber are the same.

[0018] As a further improvement of the vertical lifting V-type scissor lift: it further includes two groups of photosensitive switches respectively installed on the front side and the rear side of the master platform of the main platform, and reflective stickers corresponding to the two groups of photosensitive switches are arranged on the side of the master platform of the auxiliary platform.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention solves the problem of unreasonable lifting structure leading to increased costs through a V-shaped shear arm and a parallelogram mechanism. The shear arm adopts a V-shaped structure. The lower end of the oil cylinder is directly connected to the base, and the upper end is connected to the upper main shear arm, which can increase the initial included angle of the oil cylinder at the lowest position of the lift, and enhance the starting lifting force of the lift. At the same time, the upper main shear arm, the upper auxiliary shear arm, the connecting rod and the lower shear arm form a parallelogram. The top slider always bears pressure, with more reasonable force and more stable structure, reducing the loss of lifting force. The cylinder diameters of the oil cylinders can be reduced to 80 mm (main) and 70 mm (auxiliary), effectively reducing the production cost while ensuring sufficient lifting capacity.

[0020] 2. The present invention further widens the passage space at the bottom of the platform through the parallelogram mechanism. Due to the double-layer structure, for the same platform lifting height, the length of the shear arm is shortened. Moreover, the greater the lifting height, the more the shear arm moves towards both ends of the platform, and the passage space in the middle of the platform becomes larger and larger, increasing the passability, facilitating the operator and equipment to pass through, making it more convenient to use, and at the same time being beneficial to the position fixation during underground installation.

[0021] 3. The present invention solves the problems of easy damage, jitter and synchronization delay of the leveling system through a secondary synchronization control system composed of a synchronous oil cylinder and a hydraulic series structure. On the one hand, it can ensure that the oil supply amounts of the main and auxiliary platforms are always the same, guaranteeing the balance of the main and auxiliary platforms. On the other hand, the mother oil cylinders inside the same platform are in series, ensuring the synchronization of the oil cylinder actions inside the platform, and ultimately guaranteeing the stable and synchronous lifting and lowering of the entire lift. The secondary synchronization control system does not require the aid of a wire rope sensor, solving the problem of easy damage of the detection device. During the synchronous lifting and lowering process, it does not require frequent on-off control using solenoid valves, solving the jitter problem. And the rigidity of the hydraulic oil can ensure forced synchronization among all oil cylinders, without delay problems.

[0022] 4. The present invention is configured with a mechanical safety locking function and uses pneumatic control for unlocking, which can ensure the safety of personnel and vehicles during vehicle inspection or repair operations. At the same time, an unlocking detection travel switch is installed, which can monitor the opening and closing states of each set of locks in real time. Only when all four sets of locks are in a fully unlocked state or a locked state, is the equipment allowed to perform normal lifting and lowering.

[0023] 5. The present invention completes the leveling of the main and auxiliary platforms through a photosensitive switch, real-time monitoring the height difference. When the height difference exceeds a preset value (such as 50 mm), it will immediately control the equipment to stop, ensuring safety.

[0024] 6. The front protection mechanism can be lifted and laid flat and has its own locking function, increasing the boarding space and being convenient to operate.

[0025] 7. All components such as the shear arms and the base of the entire equipment can have completely consistent structures, which is beneficial to the standardization of production, improves the versatility of the components, and effectively reduces costs.

[0026] 8. The present invention has comprehensive functions, with a secondary lifting platform and an automobile four-wheel alignment function of a conventional large-scale scissor lift, and can realize all the inspection and maintenance functions of the lift.

[0027] 9. The middle position of the platform of the present invention adopts an upward protruding structure design, which can ensure that the lowest height of the whole machine is in a relatively low state, and is more suitable for the introduction of most low-chassis vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a top view of the present invention, used to show the positional relationship between the main platform and the auxiliary platform; Figure 2 is a perspective view of the lifting platform; Figure 3 is a side view of the lifting platform; Figure 4 is a schematic structural diagram of the base assembly part; Figure 5 is a schematic structural diagram of the master cylinder and the master machine mechanical lock assembly part; Figure 6 is a schematic structural diagram of the secondary lifting platform; Figure 7 is a schematic diagram when the tubular guardrail is lifted; Figure 8 is a schematic diagram when the tubular guardrail is laid flat; Figure 9 is a schematic structural diagram of the synchronous cylinder; Figure 10 is a hydraulic schematic diagram of the present invention; Figure 11 is a schematic diagram of measuring flatness using a photosensitive switch.

[0029] Reference numerals: 1a, Main platform, 1b, Sub-platform, 1, Mother machine platform, 2, Transposition block, 3, Secondary lifting platform body, 4, Secondary lifting scissors arm, 4-1, Secondary lifting outer scissors arm assembly, 4-2, Secondary lifting inner scissors arm assembly, 5, Secondary lifting and mechanical locking mechanism, 5-1, Secondary lifting oil cylinder, 5-2, Secondary lifting lower mechanical lock, 5-3, Secondary lifting upper mechanical lock, 5-4, Secondary lifting unlocking cylinder, 5-5, Secondary lifting cylinder seat shaft, 5-6, Secondary lifting cylinder head shaft, 6, Secondary lifting draw head, 6-1, Front draw head, 6-2, Rear draw head, 7, Side sliding plate, 8, Approach bridge, 9, Mother machine upper sub-scissors arm assembly, 10, Mother machine upper main scissors arm assembly, 11, Connecting rod, 12, Mother machine lower scissors arm assembly, 13, Base assembly, 13-1, Base body, 13-2, Pressure plate, 13-3, Fixed block, 13-4, Slide block shaft, 13-5, Bearing, 13-6, Shock absorber block, 14, Mother machine oil cylinder, 14-1, Mother machine cylinder body, 14-2, Mother machine piston rod, 14-3, Mother machine cylinder head shaft, 14-4, Mother machine cylinder seat shaft, 15, Mother machine mechanical locking assembly, 15-1, Mother machine upper mechanical lock, 15-2, Mother machine lower mechanical lock, 15-3, Mother machine unlocking cylinder, 15-4, Mother machine unlocking detection switch, 16, Front protection mechanism, 16-1, Tube type guardrail, 16-2, Support, 16-3, Fixed bolt, 16-4, Limit screw, 17, Synchronous oil cylinder, 17-1, Active cylinder body, 17-2, Active cylinder piston, 17-3, Piston connecting rod, 17-4, Three-way joint, 17-5, Driven cylinder piston, 17-6, Driven cylinder body, 17-7, Straight-through joint, 17-8, Connecting body, 18, Hydraulic station, 19, Photosensitive switch. Detailed implementation mode

[0030] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] As Figure 1 shown, a vertical lifting V-type scissor lift includes two parallel and horizontally arranged lifting platforms, namely the main platform 1a and the sub-platform 1b. The two lifting platforms are respectively used to support the left and right tires of the vehicle.

[0032] As Figure 2 , Figure 3As shown, the lifting platform includes a main machine platform 1 and two sets of main machine shear arm assemblies respectively arranged at the bottom of the front and rear ends of the main machine platform 1. The main machine shear arm assembly includes an upper auxiliary shear arm assembly 9 of the main machine, an upper main shear arm assembly 10 of the main machine, a connecting rod 11, and a lower shear arm assembly 12 of the main machine. The upper end of the upper auxiliary shear arm assembly 9 of the main machine is slidably connected to the slide rail at the bottom of the main machine platform 1 through a slider, the upper end of the upper main shear arm assembly 10 of the main machine is rotatably connected to the hinge seat of the main machine platform 1 through a hinge shaft, and the middle parts of the upper main shear arm assembly 10 of the main machine and the upper auxiliary shear arm assembly 9 of the main machine are rotatably connected through a shear arm middle shaft. The upper end of the lower shear arm assembly 12 of the main machine is rotatably connected to the lower end of the upper main shear arm assembly 10 of the main machine, and the lower end of the lower shear arm assembly 12 of the main machine is rotatably connected to the base assembly 13. The upper end of the connecting rod 11 is connected to the lower end of the upper auxiliary shear arm assembly 9 of the main machine through a hinge shaft, and the lower end is connected to the middle shaft hole of the lower shear arm assembly 12 of the main machine through a hinge shaft. The lower half of the upper auxiliary shear arm assembly 9 of the main machine, the lower half of the upper main shear arm assembly 10 of the main machine, the upper half of the lower shear arm assembly 12 of the main machine, and the connecting rod 11 form an equilateral parallelogram mechanism, so that during the lifting process of the main machine platform 1, complete vertical lifting can be achieved. The base assembly 13 corresponds to the upper auxiliary shear arm assembly 9 of the main machine, the upper main shear arm assembly 10 of the main machine, the connecting rod 11, and the lower shear arm assembly 12 of the main machine one by one. All the base assemblies 13 and the main machine shear arm assemblies have the same structure.

[0033] Further, as Figure 4 shown, the base assembly 13 includes a base body 13-1, a pressing plate 13-2, a fixing block 13-3, a slider shaft 13-4, and a bearing 13-5. Each base body 13-1 is fixedly installed on the ground to provide support for the entire lifting platform. The lower roller of the main machine shear arm at the lower end of the lower shear arm assembly 12 of the main machine is connected to the fixing block 13-3 through the bearing 13-5, and the fixing block 13-3 is installed in the chute of the base body 13-1. The pressing plate 13-2 is installed on the top of the base body 13-1 to limit the fixing block 13-3.

[0034] Further, a shock-absorbing block 13-6 is also installed on the bottom plate of the base body 13-1 to contact the main machine platform 1 when it descends to the lowest position, playing a role in shock absorption and limiting.

[0035] As Figure 5, a master machine oil cylinder 14 is also installed on the master machine shear arm assembly. The lower end of the master machine oil cylinder 14 is rotatably connected to the base assembly 13, and the upper end is rotatably connected to the main shear arm assembly 10 on the master machine. Specifically, two master machine oil cylinders 14 are provided for one set of master machine shear arm assemblies. Each master machine oil cylinder 14 includes a master machine cylinder block 14-1, a master machine piston rod 14-2, a master machine cylinder head shaft 14-3, and a master machine cylinder seat shaft 14-4. The master machine cylinder seat shaft 14-4 at the lower end of the master machine cylinder block 14-1 is rotatably connected to the base assembly 13 through a hinge shaft, and the axis of this rotational connection coincides with the axis of the rotational connection between the lower end of the master machine lower shear arm assembly 12 and the base assembly 13. The master machine cylinder head shaft 14-3 at the upper end of the master machine piston rod 14-2 is rotatably connected to the main shear arm assembly 10 on the master machine through a hinge shaft. The master machine oil cylinder 14 is installed between the main shear arm assembly 10 on the master machine and the lower shear arm assembly 12 on the master machine. The main shear arm assembly 10 on the master machine and the lower shear arm assembly 12 on the master machine form the main load-bearing mechanism of the present invention, that is, a side-mounted V-shaped structure.

[0036] Further, a master machine mechanical lock assembly 15 is also installed on the master machine shear arm assembly for locking the length of the master machine oil cylinder 14. Specifically, the master machine mechanical lock assembly 15 includes a master machine upper mechanical lock 15-1, a master machine lower mechanical lock 15-2, and a master machine unlocking cylinder 15-3. The upper end of the master machine upper mechanical lock 15-1 is rotatably connected to the upper end of the master machine oil cylinder 14, and a lock tooth block is provided at the lower end. The master machine lower mechanical lock 15-2 is fixedly arranged relative to the master machine cylinder block 14-1 of the master machine oil cylinder 14, and a rack (continuous lock teeth) for meshing with the lock tooth block is provided on the upper surface. The master machine unlocking cylinder 15-3 is used to push the lock tooth block away from the rack. Specifically, the cylinder block of the master machine unlocking cylinder 15-3 is installed on the master machine upper mechanical lock 15-1, and the piston rod of the master machine unlocking cylinder 15-3 is supported on the middle plane of the master machine lower mechanical lock 15-2. When compressed gas is introduced into the cylinder body of the master machine unlocking cylinder 15-3, the cylinder piston rod will extend, pushing up the master machine upper mechanical lock 15-1 upward, so that the lock teeth of the master machine upper mechanical lock 15-1 are disengaged from the lock teeth of the master machine lower mechanical lock 15-2 by a certain distance and cannot engage. Further, the master machine mechanical lock assembly 15 further includes a master machine unlocking detection switch 15-4 installed on the master machine upper mechanical lock 15-1 for detecting whether the lock tooth block has left the rack and completed unlocking. When the master machine unlocking cylinder 15-3 drives the master machine upper mechanical lock 15-1 to bounce up, the master machine unlocking detection switch 15-4 will also rise synchronously, and the front detection head will disengage from the master machine cylinder block 14-1 to obtain an unlocking confirmation signal. Only when the control system detects that the states of all four sets of master machine unlocking detection switches 15-4 are unlocked will it allow the equipment to lift and lower, thus avoiding non-synchronous lifting and lowering when a certain set of mechanical locks is not opened.

[0037] During operation, first unlock using the master machine unlocking cylinder 15-3, and then control the movement of the master machine shear arm assembly by the master machine cylinder 14 to realize the lifting of the master machine platform 1. After reaching the specified height, the master machine unlocking cylinder 15-3 retracts, and the locking tooth block meshes with the rack to lock the height of the lift.

[0038] Furthermore, as Figure 2 and 3 show, mounting holes for the transposition blocks 2 are reserved in the front half of the upper side of each master machine platform 1, and by installing different numbers of transposition blocks 2, the front and rear positions of the vehicle turntable with different width dimensions can be adapted to achieve the four-wheel alignment function of the vehicle. Correspondingly, side sliding plates 7 are also installed on the rear half of the upper side of each master machine platform 1 for the suspension stress release during the four-wheel alignment of the vehicle.

[0039] Furthermore, as Figure 2 、 Figure 3 、 Figure 6 show, a set of secondary lifting platforms are respectively installed at the middle positions of the master machine platforms 1, which can be respectively used to support the single-side body of the vehicle to facilitate the repair and replacement of the vehicle tires.

[0040] Specifically, the secondary lifting platform includes a secondary lifting platform body 3, a secondary lifting shear arm 4, and a secondary lifting and mechanical locking mechanism 5. The secondary lifting platform body 3 is connected to the master machine platform 1 through the secondary lifting shear arm 4 at the bottom. The secondary lifting shear arm 4 adopts a common X-type scissor lift structure, including a secondary lifting outer shear arm assembly 4-1 and a secondary lifting inner shear arm assembly 4-2. The secondary lifting and mechanical locking mechanism 5 specifically includes a secondary lifting oil cylinder 5-1, a secondary lifting lower mechanical lock 5-2, a secondary lifting upper mechanical lock 5-3, a secondary lifting unlocking cylinder 5-4, a secondary lifting cylinder seat shaft 5-5, and a secondary lifting cylinder head shaft 5-6. The secondary lifting oil cylinder 5-1 is used to drive the secondary lifting shear arm 4 to move for lifting. The secondary lifting lower mechanical lock 5-2 is provided with a rack, and the secondary lifting upper mechanical lock 5-3 is provided with a locking tooth block. The secondary lifting unlocking cylinder 5-4 is used for unlocking, and its unlocking and locking principles are exactly the same as those of the master machine upper mechanical lock 15-1, the master machine lower mechanical lock 15-2, and the master machine unlocking cylinder 15-3, and will not be elaborated here.

[0041] Furthermore, a secondary lifting draw head 6 is also provided on the secondary lifting platform body 3, which includes a front draw head 6-1 and a rear draw head 6-2.

[0042] As Figure 7 、 Figure 8As shown in the figure, a front protection mechanism 16 is installed at the very front end of the mother machine platform 1. It includes a tubular guardrail 16-1, a support 16-2, fixing bolts 16-3, and a limit screw 16-4. The support 16-2 is fixed to the front end of the mother machine platform 1 through the fixing bolts 16-3. The tubular guardrail 16-1 is formed by pressing and bending a seamless pipe, and is fixedly connected to the two side plates on both sides by welding. Two Φ10 pin shafts, one upper and one lower, are respectively welded on the side plates. The lower pin shaft penetrates into the lower long hole of the support 16-2, and axial limit is carried out through a flat washer and an opening pin; the upper pin shaft is used to slide into the positioning groove at the top of the support 16-2. When the tubular guardrail 16-1 is lifted upward by hand, the lower pin shaft will slide along the long hole, and the upper pin shaft will break away from the restriction of the positioning groove at the top of the support 16-2. At this time, the tubular guardrail 16-1 can rotate towards the front side of the platform until it approaches the horizontal position, and finally contacts the limit screw 16-4 installed on the support 16-2, as Figure 8 shown. After lifting the tubular guardrail 16-1 upward again and rotating it, and then putting down the tubular guardrail 16-1 so that the upper pin shaft is inserted into the positioning groove, it can be switched to the vertical state, as Figure 7 shown.

[0043] To control the synchronous movement of all the mother machine cylinders 14, the present invention further includes a secondary synchronous control system. The secondary synchronous control system includes a synchronous cylinder 17 and a hydraulic station 18.

[0044] Specifically, the lift is standardly equipped with an electrical control cabinet, and the synchronous cylinder 17 is installed inside the control cabinet. As Figure 9 shown, the synchronous cylinder 17 includes a main cylinder body 17-1, a main cylinder piston 17-2, a piston connecting rod 17-3, a slave cylinder piston 17-5, a slave cylinder body 17-6, and a connecting body 17-8. The main cylinder body 17-1 is connected to the slave cylinder body 17-6 through the connecting body 17-8. The main cylinder body 17-1 and the connecting body 17-8 form a first chamber, and the slave cylinder body 17-6 and the connecting body 17-8 form a second chamber. The main cylinder piston 17-2 is located in the main cylinder body 17-1, dividing the first chamber into a first oil chamber and a second oil chamber; the slave cylinder piston 17-5 is located in the slave cylinder body 17-6, dividing the second chamber into a third oil chamber and a fourth oil chamber. The main cylinder piston 17-2 and the slave cylinder piston 17-5 are fixedly connected through the piston connecting rod 17-3 to achieve the forced synchronous movement of the two pistons. The cross-sectional areas of the first oil chamber and the third oil chamber are equal. When high-pressure hydraulic oil enters the fourth oil chamber and the second oil chamber respectively through the straight-through joint 17-7 and the three-way joint 17-4 on the same side, it will simultaneously drive the main cylinder piston 17-2 and the slave cylinder piston 17-5 to move upward. At this time, the hydraulic oil output from the first oil chamber and the third oil chamber is equal.

[0045] As Figure 10, the hydraulic oil output end of the hydraulic station 18 is connected to the second oil chamber and the fourth oil chamber. The first oil chamber is communicated with the lower oil chamber of the master oil cylinder 14 at one end in the main platform 1a. The upper oil chamber of the master oil cylinder 14 at this end is then communicated with the lower oil chamber of the master oil cylinder 14 at the other end in the main platform 1a. The cross-sectional areas of the interconnected upper oil chamber and lower oil chamber are the same. Similarly, the third oil chamber is communicated with the lower oil chamber of the master oil cylinder 14 at one end in the auxiliary platform 1b. The upper oil chamber of the master oil cylinder 14 at this end is then communicated with the lower oil chamber of the master oil cylinder 14 at the other end in the auxiliary platform 1b. The cross-sectional areas of the interconnected upper oil chamber and lower oil chamber are the same. Since the amounts of hydraulic oil output from the first oil chamber and the third oil chamber are always equal, the elongation amounts of the master oil cylinders 14 directly connected to the synchronous cylinder 17 in the main platform 1a and the auxiliary platform 1b are always equal. Furthermore, since the cross-sectional areas of the interconnected oil chambers within the same platform are consistent and the amounts of oil that increase and decrease offset each other, the telescopic amounts of the master oil cylinders 14 within the platform are also always equal. Through two-stage forced synchronization, the forced synchronous lifting of the entire elevator is finally achieved.

[0046] A leveling valve group is also provided in the hydraulic system.

[0047] Such as Figure 11 , in order to monitor whether the two platforms move synchronously, two groups of photosensitive switches 19 are also added, which are respectively installed on the front side and the rear side of the master platform 1 of the master machine platform 1a. At the same time, reflective stickers corresponding to the two groups of photosensitive switches 19 are provided on the side of the master machine platform 1 of the auxiliary platform 1b. During normal operation, the photosensitive switches 19 can emit infrared beams to the reflective stickers, and after being reflected by the reflective stickers, they are respectively received by the photosensitive switches 19. Only when the height error between the auxiliary platform 1b and the main platform 1a is less than 50 mm can the photosensitive switches 19 receive the reflected infrared light, and the lift can achieve synchronous lifting. If the height error is greater than 50 mm and the reflected light cannot be received, the lift will immediately control the shutdown to prevent dangerous accidents such as vehicle rollover.

[0048] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A vertical lifting V-shaped scissor lift, comprising two parallel and horizontally arranged lifting platforms, namely a main platform (1a) and a secondary platform (1b), characterized in that: The lifting platform comprises a mother machine platform (1) and two sets of mother machine scissor arm assemblies respectively arranged at the bottom of the front and rear ends of the mother machine platform (1); The mother machine scissor arm assembly comprises a mother machine upper auxiliary scissor arm assembly (9), a mother machine upper main scissor arm assembly (10), a connecting rod (11) and a mother machine lower scissor arm assembly (12); the upper end of the mother machine upper auxiliary scissor arm assembly (9) is slidably connected to the bottom of the mother machine platform (1) through a slider, the upper end of the mother machine upper main scissor arm assembly (10) is rotatably connected to the mother machine platform (1), the middle part of the mother machine upper main scissor arm assembly (10) is rotatably connected to the middle part of the mother machine upper auxiliary scissor arm assembly (9); the upper end of the mother machine lower scissor arm assembly (12) is rotatably connected to the mother machine upper main The lower end of the scissor arm assembly (10) is rotatably connected, and the lower end of the mother machine lower scissor arm assembly (12) is rotatably connected to the base assembly (13); the upper end of the connecting rod (11) is rotatably connected to the lower end of the mother machine upper auxiliary scissor arm assembly (9), and the lower end is rotatably connected to the middle part of the mother machine lower scissor arm assembly (12); the lower half of the mother machine upper auxiliary scissor arm assembly (9), the lower half of the mother machine upper main scissor arm assembly (10), the upper half of the mother machine lower scissor arm assembly (12) and the connecting rod (11) form an equilateral parallelogram mechanism; A mother machine oil cylinder (14) is also installed on the mother machine scissor arm assembly. The lower end of the mother machine oil cylinder (14) is rotatably connected to the base assembly (13), and the upper end is rotatably connected to the main scissor arm assembly (10) on the mother machine.

2. The vertical lifting V-type scissor lift according to claim 1, characterized in that: The base assembly (13) comprises a base body (13-1), a pressure plate (13-2), a fixing block (13-3), a slider shaft (13-4) and a bearing (13-5); The base body (13-1) is fixedly installed on the ground; the lower end of the mother machine lower shear arm assembly (12) is connected to a fixed block (13-3) via a bearing (13-5); the fixed block (13-3) is installed in a slide groove of the base body (13-1); and a pressure plate (13-2) is installed on the top of the base body (13-1) and is used to limit the fixed block (13-3).

3. The vertical lifting V-type scissor lift according to claim 2, characterized in that: A shock absorbing block (13-6) is also installed on the bottom plate of the base body (13-1) and is used to contact the mother machine platform (1) that has descended to the lowest position, thereby playing a role in shock absorption and position limiting.

4. The vertical lifting V-type scissor lift according to claim 1, characterized in that: The mother machine scissor arm assembly is also provided with a mother machine mechanical lock assembly (15), which comprises a mother machine upper mechanical lock (15-1), a mother machine lower mechanical lock (15-2) and a mother machine unlocking cylinder (15-3); The upper end of the mother machine upper mechanical lock (15-1) is rotatably connected to the upper end of the mother machine oil cylinder (14), and a locking tooth block is provided at the lower end; the mother machine lower mechanical lock (15-2) is fixedly arranged relative to the mother machine cylinder body (14-1) of the mother machine oil cylinder (14), and a rack for meshing with the locking tooth block is provided on the upper surface; the mother machine unlocking cylinder (15-3) is used to push the locking tooth block away from the rack.

5. The vertical lifting V-shaped scissor lift according to claim 4, characterized in that: The master machine mechanical lock assembly (15) also includes a master machine unlocking detection switch (15-4) installed on the mechanical lock (15-1) on the master machine, which is used to detect whether the lock tooth block leaves the rack and completes unlocking; The equipment is allowed to be raised or lowered only when the status of the unlocking detection switches (15-4) of the four master machines are all unlocked.

6. The vertical lifting V-type scissor lift according to claim 1, characterized in that: A set of secondary lifting platforms are respectively installed at the middle position of the mother machine platform (1), which can be used to support the single side of the automobile body, so as to facilitate the repair and replacement of the automobile tires; the secondary lifting platform comprises a secondary lifting platform body (3), a secondary lifting shear arm (4) and a secondary lifting and mechanical locking mechanism (5); A secondary lifting pull-out head (6) is also provided on the secondary lifting platform body (3), and comprises a front pull-out head (6-1) and a rear pull-out head (6-2).

7. The vertical lifting V-type scissor lift according to claim 1, characterized in that: A front protection mechanism (16) is installed at the front end of the mother machine platform (1), which includes a tubular protection fence (16-1), a support (16-2), a fixing bolt (16-3) and a limit screw (16-4); The support (16-2) is fixed to the front end of the mother machine platform (1) by means of fixing bolts (16-3); the two ends of the tubular guardrail (16-1) are respectively fixedly connected with side plates, and the side plates are provided with upper and lower pins; the lower pin is inserted into the lower long hole of the support (16-2), and the upper pin is used to slide into the positioning groove at the top of the support (16-2); When the tubular guardrail (16-1) is switched to a horizontal state, the tubular guardrail (16-1) is lifted upward by hand, the lower pin shaft slides along the long hole, and the upper pin shaft is disengaged from the top positioning groove of the support (16-2). At this time, the tubular guardrail (16-1) is rotated forward until it is horizontal and contacts with the limit screw (16-4) installed on the support (16-2); when the tubular guardrail (16-1) is switched to a vertical state, the tubular guardrail (16-1) is lifted upward and rotated, and then the tubular guardrail (16-1) is lowered so that the upper pin shaft is inserted into the positioning groove.

8. The vertical lifting V-type scissor lift according to claim 1, characterized in that: It also includes a secondary synchronization control system, the secondary synchronization control system includes a synchronization cylinder (17); The synchronous oil cylinder (17) comprises an active cylinder body (17-1), an active cylinder piston (17-2), a piston connecting rod (17-3), a slave cylinder piston (17-5), a slave cylinder body (17-6) and a connecting body (17-8); the active cylinder body (17-1) and the slave cylinder body (17-6) are connected via the connecting body (17-8); the active cylinder body (17-1) and the connecting body (17-8) form a first chamber, and the slave cylinder body (17-6) and the connecting body (17-8) form a second chamber; the active cylinder piston (17-2) is located in the active cylinder body (17-1) and connects the first The chamber is divided into a first oil chamber and a second oil chamber; the slave cylinder piston (17-5) is located in the slave cylinder body (17-6), dividing the second chamber into a third oil chamber and a fourth oil chamber; the active cylinder piston (17-2) and the slave cylinder piston (17-5) are fixedly connected via a piston connecting rod (17-3) to achieve forced synchronous movement of the two pistons; the cross-sectional areas of the first oil chamber and the third oil chamber are equal; when high-pressure hydraulic oil enters the fourth oil chamber and the second oil chamber, it drives the active cylinder piston (17-2) and the slave cylinder piston (17-5) to move upward synchronously, and at this time, the hydraulic oil output from the first oil chamber and the third oil chamber is equal.

9. The vertical lifting V-type scissor lift according to claim 8, characterized in that: The secondary synchronous control system also includes a hydraulic station (18); The hydraulic oil output end of the hydraulic station (18) is connected to the second oil chamber and the fourth oil chamber; the first oil chamber is connected to the lower oil chamber of the mother machine oil cylinder (14) at one end of the main platform (1a); the upper oil chamber of the mother machine oil cylinder (14) at this end is connected to the lower oil chamber of the mother machine oil cylinder (14) at the other end of the main platform (1a); the cross-sectional areas of the upper oil chamber and the lower oil chamber that are connected to each other are the same; the third oil chamber is connected to the lower oil chamber of the mother machine oil cylinder (14) at one end of the auxiliary platform (1b); the upper oil chamber of the mother machine oil cylinder (14) at this end is connected to the lower oil chamber of the mother machine oil cylinder (14) at the other end of the auxiliary platform (1b); the cross-sectional areas of the upper oil chamber and the lower oil chamber that are connected to each other are the same.

10. The vertical lifting V-type scissor lift according to any one of claims 1 to 9, characterized in that: It also includes two groups of photosensitive switches (19) respectively mounted on the front side and the rear side of the mother machine platform (1) of the main platform (1a), and the side of the mother machine platform (1) of the secondary platform (1b) is provided with reflective stickers corresponding to the two groups of photosensitive switches (19).

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