Lifting platform with overload alarm function

Abstract

The lifting platform with the overload alarm function comprises a base and a lifting platform body, the lifting platform body is arranged on the base and connected with the base, a supporting device is arranged below the base, the supporting device comprises wheels, wheel frames and wheel fixing frames, and the wheels are arranged on the wheel frames. The wheel fixing frame is arranged at the lower end of the wheel frame and movably connected with the wheel frame, a wheel shaft of the wheel is installed at the lower end of the wheel fixing frame, and a damping assembly is connected between the wheel frame and the wheel fixing frame and comprises a connecting piece, an elastic piece and a pressing block. The lower end of the connecting piece penetrates through the wheel frame to be fixedly connected with the wheel fixing frame, the elastic piece is arranged between the pressing block and the wheel frame, a travel switch is fixedly arranged on the wheel frame and electrically connected with an alarm device, and when compression of the elastic piece exceeds a safety range, the pressing block moves downwards to trigger a contact of the travel switch so as to trigger the alarm device to give an alarm. The damping effect is good, and the alarm function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a lifting platform with an overload alarm function. Background Art

[0002] A lifting platform is a mechanical device used to lift heavy objects. It can provide safe and efficient lifting and handling functions in various height working environments. Lifting platforms are usually equipped with power systems, control systems and safety protection devices. When using a lifting platform, the operator can adjust the height of the platform as needed to facilitate operations at different working levels. The application range of the lifting platform is very wide. It can play a role in many fields such as construction, factory production, logistics and transportation. During the lifting and falling process of the lifting platform, factors such as heavy objects and system acceleration during the fall will cause a large impact and vibration to the platform. In addition, during the handling process of the lifting platform, if it is bumped, it will also cause impact and vibration to the platform. If the shock absorption effect of the lifting platform is not good, it cannot effectively absorb and reduce these vibrations and impacts, which will not only affect the stability of the lifting platform and increase the uncertainty and risk of operation, but also in the long run, it may cause damage to the equipment itself and shorten its service life. In addition, when the lifting platform is overloaded, it is also easy to cause damage to the equipment structure and even serious safety accidents, which poses a great threat to the personal safety of the operator, so it is necessary to improve it. Utility Model Content

[0003] The purpose of the utility model is to provide a lifting platform with an overload alarm function in view of the defects and shortcomings of the prior art. The lifting platform has a simple and reasonable structure, is easy to operate, has a good shock absorption effect, and alarms when overloaded to warn the user that the device is overloaded.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a lifting platform with overload alarm function, comprising a base and a lifting platform body, the lifting platform body is arranged on the base and connected to the base, a supporting device is arranged below the base, the supporting device comprises wheels, a wheel frame and a wheel fixing frame, the wheel fixing frame is arranged at the lower end of the wheel frame and is movably connected to the wheel frame, the wheel axle of the wheel is installed at the lower end of the wheel fixing frame, a shock absorbing assembly is connected between the wheel frame and the wheel fixing frame, the shock absorbing assembly comprises a connecting piece, an elastic piece and a pressure block, the upper end of the connecting piece is fixedly connected to the pressure block, the lower end of the connecting piece passes through the wheel frame and is fixedly connected to the wheel fixing frame, the elastic piece is arranged between the pressure block and the wheel frame, a travel switch is fixedly provided on the wheel frame, the travel switch is electrically connected to the alarm device, when the compression of the elastic piece exceeds the safety range, the pressure block moves downward to trigger the contacts of the travel switch and then trigger the alarm device to alarm.

[0006] Furthermore, a bearing seat is fixedly connected to the upper end of the wheel frame, and the bearing seat is fixedly connected to the base via connecting bolts.

[0007] Furthermore, the lifting platform body includes a lifting mechanism and a lifting platform, and the lifting platform is connected to the base through the lifting mechanism.

[0008] Furthermore, the lifting platform includes a lower frame, a lower platform, an upper frame and an upper platform. The lower frame is connected to the base through the lifting mechanism, the lower platform is movably connected to the lower frame, the upper frame is located above the lower platform, a second adjustment mechanism is provided between the upper frame and the lower platform, the upper platform is connected to the upper frame, and a pallet column is provided on the upper platform.

[0009] Furthermore, the lifting mechanism includes a scissor lift frame, a hydraulic cylinder and a power unit. The scissor lift frame is connected between the base and the lower platform. The hydraulic cylinder is arranged on the scissor lift frame to drive the scissor lift frame to lift and lower. The power unit is arranged on the base. The power unit and the hydraulic cylinder are connected by a pipeline to control the movement of the hydraulic cylinder.

[0010] Furthermore, the supporting device is provided below one end of the base, a supporting column is provided below the other end of the base, and a transport vehicle is also provided at one end of the base close to the supporting column.

[0011] Furthermore, a spring sheet is provided on the travel switch, one end of the spring sheet is fixedly connected to the travel switch, the other end of the spring sheet is abutted against the pressing block, and a gap is formed between the spring sheet and the contact of the travel switch.

[0012] Furthermore, one end of the wheel frame is hinged to the wheel fixing frame via a hinge, and the other end of the wheel frame is connected to the wheel fixing frame via the shock absorbing assembly.

[0013] Furthermore, a mounting plate is fixedly provided on the inner wall of the wheel fixing frame, and a first waist-shaped hole is provided on the mounting plate along the height direction of the wheel. The hinge passes through the wheel frame, and the wheel fixing frame is arranged in the first waist-shaped hole and slidably cooperates with the first waist-shaped hole.

[0014] Furthermore, a travel switch fixing seat is fixedly provided at the lower end of the travel switch, and the travel switch fixing seat is fixedly connected to the mounting plate.

[0015] The beneficial effects of the utility model are as follows: the lifting platform with overload alarm function described in the utility model is provided with a supporting device, and a shock-absorbing component is provided on the supporting device, which can effectively reduce vibration and impact and play a buffering role. When subjected to external impact, it can effectively absorb and disperse these forces. In the no-load state, that is, the upper end of the lifting platform does not bear the load, at this time, the travel switch and the pressure block are in a separated state, the two are not in contact, the travel switch is not closed, and the buzzer alarm circuit is not connected; in the lifting platform rated load state, at this time, the wheel moves toward the wheel frame, and the wheel fixing frame is hinged The connecting piece swings downward relative to the wheel frame as a fulcrum, so that the spring is compressed and drives the pressure block to move downward. Since the rotation angle of the wheel fixing frame is small, the spring compression is within the safety range, the contacts of the travel switch are not triggered, the travel switch is not closed, and the buzzer alarm circuit is not connected; when the lifting platform is overloaded, the rotation angle of the wheel fixing frame increases, so that the spring compression exceeds the safety range. Under the action of the pressure block, the contacts of the travel switch are triggered, and the travel switch changes from an open state to a closed state, so that the connected buzzer alarm circuit is connected, thereby triggering the alarm function to warn the user of overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 is a schematic diagram of the cross-sectional structure of the supporting device in a normal state;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the supporting device in a working state;

[0019] Figure 4 is a structural schematic diagram of the supporting device in a normal state at a first viewing angle;

[0020] Figure 5 is a structural schematic diagram of the supporting device in a normal state at a second viewing angle;

[0021] Figure 6 It is a structural schematic diagram of the supporting device in a working state;

[0022] Figure 7 is a schematic diagram of the structure of the wheel frame;

[0023] Figure 8 It is a schematic diagram of the structure of the mounting plate;

[0024] Fig. 9 It is a schematic diagram of the exploded structure of the lifting platform.

[0025] Figure 1-9In: 1. base; 2. support device; 21. wheel; 22. wheel frame; 221. bearing seat; 23. wheel fixing frame; 231. mounting plate; 2311. first waist-shaped hole; 24. shock-absorbing assembly; 241. connecting piece; 242. elastic piece; 243. pressing block; 25. travel switch; 251. contact; 252. spring piece; 253. travel switch fixing seat; 3. lifting mechanism; 4. lifting platform; 41. lower frame; 4 11. first universal ball; 412. limiting ring; 413. round hole; 414. limiting gasket; 42. lower platform; 421. locking device; 422. handle; 43. upper platform; 44. upper platform; 441. pallet column; 442. fixed platform; 443. mobile platform; 444. second universal ball; 45. first adjusting assembly; 46. second adjusting assembly; 47. support rod; 5. support column; 6. transport vehicle; 7. hinge. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-9 The lifting platform with overload alarm function shown in the figure comprises a base 1 and a lifting platform body, wherein the lifting platform body is arranged on the base 1 and connected to the base 1 to ensure the stability of the entire structure, and a supporting device 2 is arranged under the base 1 to provide stable support, see Figure 4-6 The supporting device 2 includes a wheel 21, a wheel frame 22 and a wheel fixing frame 23. The wheel fixing frame 23 is arranged at the lower end of the wheel frame 22 and is movably connected to the wheel frame 22. The wheel axle of the wheel 21 is installed at the lower end of the wheel fixing frame 23. A shock absorbing assembly 24 is connected between the wheel frame 22 and the wheel fixing frame 23, which can effectively reduce vibration and impact. Specifically, the shock absorbing assembly 24 includes a connecting member 241, an elastic member 242 and a pressing block 243. The upper end of the connecting member 241 is fixedly connected to the pressing block 243, and the lower end of the connecting member 241 passes through the wheel frame 22 and is fixedly connected to the wheel fixing frame 23. The elastic member 242 is arranged between the pressing block 243 and the wheel frame 22. It plays a buffering role and can effectively absorb and disperse these forces when subjected to external impact. Preferably, in this embodiment, the elastic member 242 is a spring, and the spring has excellent elasticity and buffering performance. Preferably, in this embodiment, the spring is sleeved on the connecting member 241 to improve the structural stability. A travel switch 25 is fixedly provided on the wheel frame 22, and the travel switch 25 is electrically connected to an alarm device. When the compression of the elastic member 242 exceeds the safety range, the pressure block 243 moves downward to trigger the contact 251 of the travel switch 25 and then triggers the alarm device to alarm. Preferably, in this embodiment, the alarm device is a buzzer to warn the user that the device may be overloaded.

[0028] Preferably, in this embodiment, refer to Figure 2-3 The upper end of the wheel frame 22 is fixedly connected to a bearing seat 221, and the bearing seat 221 is fixedly connected to the base 1 by connecting bolts. The connection method is simple and firm, and can effectively transfer the load borne by the base 1 to the bearing seat 221. Preferably, in this embodiment, refer to Figure 7 The two side walls of the wheel frame 22 are arranged in an "L" shape, which helps to enhance the load-bearing capacity and stability of the wheel frame 22, and is also helpful to save materials and reduce unnecessary weight.

[0029] Preferably, in this embodiment, a spring sheet 252 is provided on the travel switch 25, one end of the spring sheet 252 is fixedly connected to the travel switch 25, and the other end of the spring sheet 252 is abutted against the pressing block 243, and a gap is formed between the spring sheet 252 and the contact 251 of the travel switch 25, that is, the spring sheet 252 does not contact the contact 251 of the travel switch 25, and when the pressing block 243 moves downward, it presses down the spring sheet 252, so that the spring sheet 252 gradually approaches the contact 251 of the travel switch 25, and when the spring sheet 252 triggers the contact 251 of the travel switch 25, the travel switch 25 changes from an open state to a closed state, so that the connected buzzer alarm circuit is connected, thereby triggering the alarm function.

[0030] Preferably, in this embodiment, one end of the wheel frame 22 is hinged to the wheel fixing frame 23 via a hinge 7, and the other end of the wheel frame 22 is connected to the wheel fixing frame 23 via the shock absorbing assembly 24. When loaded, the wheel fixing frame 23 swings downward relative to the wheel frame 22 with the hinge 7 as a fulcrum, and acts on the shock absorbing assembly 24 to realize the shock absorbing function.

[0031] Preferably, in this embodiment, refer to Figure 8 A mounting plate 231 is also fixedly disposed on the inner wall of the wheel fixing frame 23, and a first waist-shaped hole 2311 is disposed on the mounting plate 231 along the height direction of the wheel 21. The hinge 7 passes through the wheel frame 22, and the wheel fixing frame 23 is disposed in the first waist-shaped hole 2311 and slidably cooperates with the first waist-shaped hole 2311, allowing the wheel fixing frame 23 to move along the direction of the first waist-shaped hole 2311, while maintaining certain restrictions to prevent the wheel fixing frame 23 from excessive movement.

[0032] Preferably, in this embodiment, a travel switch fixing seat 253 is fixedly provided at the lower end of the travel switch 25, and the travel switch fixing seat 253 is fixedly connected to the mounting plate 231. Specifically, the travel switch fixing seat 253 and the mounting plate 231 are fixedly connected by fastening bolts. The connection method is simple and firm. The fastening bolts pass through the travel switch fixing seat 253, the travel switch 25 and the mounting plate 231 in sequence, and are fixedly connected, which can effectively prevent the travel switch 25 from being unexpectedly displaced and affecting its use.

[0033] See also Figure 2 , 4 5. In the no-load state, that is, the upper end of the lifting platform does not bear the load, at this time, the travel switch 25 and the pressure block 243 are in a separated state, the two are not in contact, the travel switch 25 is not closed, and the buzzer alarm circuit is not connected; in the lifting platform load state, at this time, the wheel 21 moves toward the wheel frame 22, and the wheel fixing frame 23 swings downward relative to the wheel frame 22 with the hinge 7 as the fulcrum, so that the spring is compressed and drives the pressure block 243 to move downward. Since the rotation angle of the wheel fixing frame 23 is small, the spring compression is within the safety range, and the contact 251 of the travel switch 25 is not triggered, the travel switch 25 is not closed, and the buzzer alarm circuit is not connected; refer to Figure 3 , 6 When the lifting platform is overloaded, the rotation angle of the wheel fixing frame 23 increases, causing the compression of the spring to exceed the safe range. Under the action of the pressure block 243, the contact 251 of the travel switch 25 is triggered, and the travel switch 25 changes from an open state to a closed state, so that the connected buzzer alarm circuit is connected, thereby triggering the alarm function to warn the user of overload. It should be noted that the compression stroke of the spring will change according to the change of the material and pitch of the spring.

[0034] Preferably, in this embodiment, the lifting platform body includes a lifting mechanism 3 and a lifting platform 4 , and the lifting platform 4 is connected to the base 1 through the lifting mechanism 3 .

[0035] Preferably, in this embodiment, refer to Fig. 9 The lifting platform 4 includes a lower frame 41, a lower platform 42, an upper frame 43 and an upper platform 44. The lower frame 41 is connected to the base 1 through the lifting mechanism 3. The lower platform 42 is movably connected to the lower frame 41. A first adjustment mechanism is provided between the lower platform 42 and the lower frame 41. The lower platform 42 can move horizontally relative to the lower frame 41 through the first adjustment mechanism. The upper frame 43 is located above the lower platform 42. A second adjustment mechanism is provided between the upper frame 43 and the lower platform 42. The second adjustment mechanism is used to adjust the inclination of the upper frame 43 relative to the lower platform 42. The upper platform 44 is connected to the upper frame 43. A pallet column 441 is provided on the upper platform 44.

[0036] Preferably, in this embodiment, the upper platform 44 includes a fixed platform 442 and a movable platform 443 which are separately arranged, the fixed platform 442 is fixedly connected to the upper stage 43, a plurality of second universal balls 444 and second ball seats which are arranged in a one-to-one correspondence with the second universal balls 444 are arranged between the movable platform 443 and the upper stage 43, the second ball seats are fixedly connected to the upper stage 43, the second universal balls 444 are movably arranged in the second ball seats, the lower surface of the movable platform 443 is placed on the second universal balls 444 and slidably cooperates with the second universal balls 444, so that the movable platform 443 can move relative to the upper stage 43 while maintaining a stable state, the side wall of the movable platform 443 is horizontally provided with a plurality of second waist-shaped holes along the sliding direction, the upper stage 43 is provided with first screws which are in a one-to-one correspondence with the second waist-shaped holes, the user can slide and adjust the position of the movable platform 443 as needed, and the application range is wider.

[0037] Preferably, in this embodiment, the pallet column 441 includes a moving part, an elevated base 1, an adjusting screw and a rubber pallet pad which are arranged in sequence from bottom to top. The elevated base 1 is fixedly connected to the moving part. The supporting function of the elevated base 1 can increase the height of the pallet column 441. A third waist-shaped hole is provided on the moving part, and the upper platform 44 is provided with a second screw which corresponds to the third waist-shaped hole one by one. The moving part can rotate or slide horizontally relative to the second screw through the third waist-shaped hole, thereby adjusting the position of the pallet column 441 on the upper platform 44. The adjustment range is wide and the degree of freedom is high. The bottom of the adjusting screw is threadedly connected to the elevated base 1 so that it can move up and down relative to the elevated base 1, and the top of the adjusting screw is fixedly connected to the rubber pallet pad.

[0038] When adjusting the position of the pallet column 441, loosen the second screw, the movable part can rotate horizontally relative to the second screw, and can slide horizontally along the third waist-shaped hole, thereby adjusting the position of the pallet column 441 on the upper platform 44. After adjusting to the appropriate position, tighten the second screw to fix it, which can ensure that the pallet column 441 can remain stable in the working state to avoid accidental movement and affect its use.

[0039] When adjusting the height of the tray column 441, rotate the adjustment screw. Since the adjustment screw is threadedly connected to the heightening base 1, as the adjustment screw rotates, the adjustment screw can move up and down relative to the heightening base 1, thereby adjusting the height of the tray column 441 to meet different height requirements.

[0040] Preferably, in this embodiment, the first adjustment mechanism includes a plurality of first universal balls 411 and first ball sockets arranged one-to-one corresponding to the first universal balls 411, the bottom of the first ball sockets is fixedly connected to the lower frame 41, the first universal balls 411 are movably arranged in the first ball sockets, and the lower surface of the lower platform 42 is placed on the first universal balls 411 and slidably cooperates with the first universal balls 411, so that the lower platform 42 can move relative to the lower frame 41 while maintaining a stable state.

[0041] Preferably, in this embodiment, the second adjustment mechanism includes a first adjustment component 45, a second adjustment component 46 and a support rod 47, the first adjustment component 45 and the second adjustment component 46 each include a connecting rod, a top rod, a bottom rod, an adjustment handle and a hinge seat, the hinge seat is fixedly connected to the upper stand 43, the top of the top rod is provided with a hinged portion hinged to the hinge seat, the bottom of the top rod is threadedly connected to the top of the connecting rod, the hinged portion is a circular ring, the axis of the circular ring is perpendicular to the axis of the top rod, the hinge seat is provided with a pin shaft matched with the circular ring, the circular ring is hinged to the hinge seat through the pin shaft, and the connection The bottom of the rod is threadedly connected to the top of the bottom rod, and the bottom of the bottom rod is fixedly connected to the lower platform 42. The side wall of the connecting rod is provided with an adjustment handle, and an elastic pin is also provided in the connecting rod. The top of the bottom rod is provided with an axial hole that cooperates with the elastic pin, which plays a limiting role to prevent the connecting rod from moving excessively outward during rotation and causing separation from the bottom rod, affecting use. The bottom of the support rod 47 is fixedly connected to the lower platform 42, and the top of the support rod 47 is provided with a ball head. The upper stand 43 is fixedly provided with a ball head seat that cooperates with the ball head, so that the upper stand 43 can rotate relative to the support rod 47.

[0042] Specifically, the first adjustment component 45, the second adjustment component 46 and the support rod 47 cooperate to form a triangular structure, which can provide a good supporting effect. With the support rod 47 as the fulcrum, the inclination of the upper platform 43 relative to the lower platform 42 is adjusted by changing the height of the first adjustment component 45 and the second adjustment component 46. During operation, by turning the adjustment handle, the connecting rod will rotate accordingly. Since the connecting rod is threadedly connected to the top rod and the bottom rod, as the connecting rod rotates, the distance between the top rod and the bottom rod will be correspondingly opened or reduced. The change in this distance directly affects the height of the first adjustment component 45 and the second adjustment component 46. It has a simple structure and is easy to operate. The height of the first adjustment component 45 and the second adjustment component 46 can be quickly adjusted. In addition, the threaded connection method also has good stability and reliability, which can ensure the safety and stability of the first adjustment component 45 and the second adjustment component 46 during use.

[0043] Preferably, in this embodiment, the lower stand 41 is horizontally provided with a limit ring 412. Specifically, the limit ring 412 is arranged around the lower stand 41. The limit ring 412 is fixedly connected to the lower stand 41. A circular hole 413 is arranged at the center of the limit ring 412. A limit bolt corresponding to the limit ring 412 is fixedly connected to the lower surface of the lower platform 42. The bottom of the limit bolt movably passes through the circular hole 413 and is connected to the limit member. Specifically, the limit member includes a limit gasket 41 4 and a limiting nut, the limiting gasket 414 cooperates with the lower end surface stop of the limiting ring 412, the limiting bolt passes through the limiting gasket 414 and is fixedly connected with the limiting nut, which is used to prevent the lower platform 42 from falling off from the lower frame 41, when the lower platform 42 moves horizontally relative to the lower frame 41 through the first universal ball 411, the limiting bolt moves synchronously with the lower platform 42, and the circular hole 413 is used as the limiting boundary of the limiting bolt, thereby limiting the horizontal activity range of the lower platform 42 relative to the lower frame 41.

[0044] Preferably, see Fig. 9 , a plurality of locking devices 421 are provided on the side walls of the lower platform 42. Specifically, in the present embodiment, there are four locking devices 421, which are symmetrically arranged on the two side walls of the lower platform 42. When the user adjusts the lower platform 42 to a suitable position, the position of the lower platform 42 is fixed by the locking devices 421, thereby ensuring that the lower platform 42 can remain stable in the working state and prevent accidental movement or overturning that affects the use. Of course, in other embodiments, the locking devices 421 may also be arranged on the four side walls of the lower platform 42, and the number of the locking devices 421 may also be adjusted accordingly according to actual needs to achieve a better fixing effect.

[0045] Preferably, in this embodiment, the locking device 421 is a push-pull type quick clamp, which belongs to the prior art and is also called a quick clamp, a push-pull type clamp, a tooling caliper, a locker, a clamp, etc. The push-pull type quick clamp includes an operating handle, a push-pull rod and a top block, wherein the operating handle is arranged on the outer wall of the lower platform 42, one end of the push-pull rod passes through the side wall of the lower platform 42 and is connected and linked with the operating handle, and the other end of the push-pull rod is provided with a top block, which is matched with the outer wall of the lower stand 41. During operation, the operating handle is pulled upward to retract the push-pull rod connected and linked with it, at which time the top block is separated from the outer wall of the lower stand 41 to realize unlocking, and the operating handle is pulled downward to extend the push-pull rod connected and linked with it, and the top block is pressed against the outer wall of the lower stand 41 to fix the position of the lower platform 42 on the lower stand 41 to avoid unexpected movement and affect use.

[0046] Regarding the specific structure of the push-pull quick clamp, reference may be made to a device for opening a circular hoop of a circular pipe support disclosed in a Chinese patent application (publication number: CN205835176U), in which the push-pull rod, operating handle and other structures are similar to the specific structure / principle of the push-pull quick clamp described in this embodiment. In view of the fact that its basic structure / principle has been disclosed in detail in the prior art, it will not be described in detail in this embodiment.

[0047] Preferably, in this embodiment, refer to Fig. 9 A handle 422 is also provided on the side wall of the lower platform 42 to facilitate the operator to grasp and move the lower platform 42.

[0048] Preferably, in this embodiment, the lifting mechanism 3 includes a scissor-type lifting frame, a hydraulic cylinder and a power unit. The scissor-type lifting frame is connected between the base 1 and the lower frame 41. The hydraulic cylinder is arranged on the scissor-type lifting frame to drive the scissor-type lifting frame to lift. The power unit is arranged on the base 1. The power unit and the hydraulic cylinder are connected through a pipeline to control the movement of the hydraulic cylinder. The pipeline plays a role in transmitting power. When working, the power unit supplies oil to the hydraulic cylinder through the pipeline, and the piston rod in the hydraulic cylinder extends under the action of the oil pressure, driving the scissor-type lifting frame to achieve jacking. When not working, the oil returns to the power unit under the action of gravity, the piston rod retracts, and the scissor-type lifting frame returns to the initial state. For the specific structure of the scissor-type lifting frame, reference can be made to a scissor-type lifting platform disclosed in a Chinese patent application (Announcement No.: CN104603044B). In view of the fact that the basic structure / principle of the scissor-type lifting frame has been disclosed in detail in the prior art, it will not be described in detail in this embodiment.

[0049] Preferably, in this embodiment, the supporting device 2 is provided under one end of the base 1, and a supporting column 5 is provided under the other end of the base 1. A transport vehicle 6 is also provided at one end of the base 1 close to the supporting column 5, so as to facilitate the transport function of the lifting platform. For the specific structure of the transport vehicle 6, reference may be made to a new energy vehicle battery auxiliary disassembly transport vehicle 6 and method disclosed in a Chinese patent application (publication number: CN113929010A). In view of the fact that the basic structure / principle of the transport vehicle 6 has been disclosed in detail in the prior art, it will not be described in detail in this embodiment.

[0050] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A lifting platform with an overload alarm function, comprising a base (1) and a lifting platform body, wherein the lifting platform body is arranged on the base (1) and connected to the base (1), and is characterized in that: A support device (2) is provided below the base (1), the support device (2) comprising a wheel (21), a wheel frame (22) and a wheel fixing frame (23), the wheel fixing frame (23) being provided at the lower end of the wheel frame (22) and movably connected to the wheel frame (22), the wheel axle of the wheel (21) being mounted at the lower end of the wheel fixing frame (23), a shock absorbing assembly (24) being connected between the wheel frame (22) and the wheel fixing frame (23), the shock absorbing assembly (24) comprising a connecting piece (241), an elastic piece (242) and a pressing block (243), the connecting piece (241) and the wheel fixing frame (243) The upper end of the connecting member (241) is fixedly connected to the pressing block (243), and the lower end of the connecting member (241) passes through the wheel frame (22) and is fixedly connected to the wheel fixing frame (23). The elastic member (242) is arranged between the pressing block (243) and the wheel frame (22). A travel switch (25) is fixedly arranged on the wheel frame (22). The travel switch (25) is electrically connected to an alarm device. When the compression of the elastic member (242) exceeds a safe range, the pressing block (243) moves downward to trigger a contact (251) of the travel switch (25), thereby triggering the alarm device to sound an alarm.

2. The lifting platform with overload alarm function according to claim 1, characterized in that: The upper end of the wheel frame (22) is fixedly connected to a bearing seat (221), and the bearing seat (221) is fixedly connected to the base (1) via connecting bolts.

3. The lifting platform with overload alarm function according to claim 1, characterized in that: The lifting platform body comprises a lifting mechanism (3) and a lifting platform (4), and the lifting platform (4) is connected to the base (1) via the lifting mechanism (3).

4. The lifting platform with overload alarm function according to claim 3, characterized in that: The lifting platform (4) comprises a lower frame (41), a lower platform (42), an upper frame (43) and an upper platform (44); the lower frame (41) is connected to the base (1) via the lifting mechanism (3); the lower platform (42) is movably connected to the lower frame (41); the upper frame (43) is located above the lower platform (42); a second adjustment mechanism is provided between the upper frame (43) and the lower platform (42); the upper platform (44) is connected to the upper frame (43); and a pallet column (441) is provided on the upper platform (44).

5. The lifting platform with overload alarm function according to claim 4, characterized in that: The lifting mechanism (3) comprises a scissor-type lifting frame, a hydraulic cylinder and a power unit; the scissor-type lifting frame is connected between the base (1) and the lower platform (41); the hydraulic cylinder is arranged on the scissor-type lifting frame to drive the scissor-type lifting frame to lift; the power unit is arranged on the base (1); the power unit and the hydraulic cylinder are connected via a pipeline to control the movement of the hydraulic cylinder.

6. The lifting platform with overload alarm function according to claim 1, characterized in that: The supporting device (2) is provided below one end of the base (1), a supporting column (5) is provided below the other end of the base (1), and a transport vehicle (6) is also provided at one end of the base (1) close to the supporting column (5).

7. The lifting platform with overload alarm function according to claim 1, characterized in that: The travel switch (25) is provided with a spring sheet (252), one end of the spring sheet (252) is fixedly connected to the travel switch (25), the other end of the spring sheet (252) is abutted against the pressing block (243), and a gap is formed between the spring sheet (252) and the contact (251) of the travel switch (25).

8. The lifting platform with overload alarm function according to claim 1, characterized in that: One end of the wheel frame (22) is hinged to the wheel fixing frame (23) via a hinge (7), and the other end of the wheel frame (22) is connected to the wheel fixing frame (23) via the shock absorbing assembly (24).

9. The lifting platform with overload alarm function according to claim 8, characterized in that: The inner wall of the wheel fixing frame (23) is also fixedly provided with a mounting plate (231), the mounting plate (231) being provided with a first waist-shaped hole (2311) along the height direction of the wheel (21), the hinge (7) passing through the wheel frame (22), the wheel fixing frame (23) being arranged in the first waist-shaped hole (2311) and being slidably matched with the first waist-shaped hole (2311).

10. The lifting platform with overload alarm function according to claim 9, characterized in that: A travel switch fixing seat (253) is fixedly provided at the lower end of the travel switch (25), and the travel switch fixing seat (253) is fixedly connected to the mounting plate (231).

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