CN114476897A - Lifting device - Google Patents
Lifting device Download PDFInfo
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- CN114476897A CN114476897A CN202210178831.2A CN202210178831A CN114476897A CN 114476897 A CN114476897 A CN 114476897A CN 202210178831 A CN202210178831 A CN 202210178831A CN 114476897 A CN114476897 A CN 114476897A
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- Prior art keywords
- lifting
- lifting frame
- assembly
- ball screw
- base
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
- B66B7/08—Arrangements of ropes or cables for connection to the cars or cages, e.g. couplings
- B66B7/085—Belt termination devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/22—Lifting frames, e.g. for lifting vehicles; Platform lifts with tiltable platforms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
Abstract
The invention relates to the technical field of vehicle auxiliary instruments, and aims to provide a lifting device. The adopted technical scheme is as follows: a lifting device comprises a base, a lifting frame, a lifting assembly and a driving assembly; the lifting frame is rotationally connected with the base; one end of the lifting component is rotatably connected with the lifting frame, and the other end of the lifting component is rotatably connected with one end of the base far away from the lifting frame; the driving component is arranged on the base and used for driving the lifting component to extend or shorten; the lifting assembly comprises a ball screw pair, a positioning sleeve and a supporting rod, the positioning sleeve is sleeved at the end part of a screw rod of the ball screw pair, the positioning sleeve is rotatably connected with the base, one end of the supporting rod is rotatably connected with the lifting frame, and the other end of the supporting rod is connected with a nut of the ball screw pair; the driving assembly comprises a servo motor, and the output end of the servo motor is in transmission connection with a screw of the ball screw pair. The invention has the advantages of high positioning precision, quick motion response, small transmission clearance and compact structure, and is suitable for special vehicles.
Description
Technical Field
The invention relates to the technical field of vehicle auxiliary instruments, in particular to a lifting device.
Background
At present, in the use process of special vehicles, lifting devices are assembled on a plurality of vehicles along with the vehicles so as to lift the devices such as the magazine boxes on the vehicles. In the prior art, as disclosed in chinese patent publication No. CN102555877A, a lifting frame of a dump truck lifting device is mainly driven by a hydraulic cylinder.
However, in using the prior art, the inventor finds that at least the following problems exist in the prior art: when the hydraulic cylinder is subjected to certain impact force, hydraulic oil can be slightly compressed, so that the requirement of keeping high-precision positioning of devices such as a magazine and the like on a vehicle cannot be met by providing enough rigidity. Meanwhile, the response speed of the control of the hydraulic cylinder is low and the control precision is poor; the hydraulic oil of the hydraulic driving system has certain influence on environmental pollution; when the lifting device is in severe environments such as high temperature and low temperature, the change of the viscosity of hydraulic oil has certain influence on the lifting force and control. In addition, when the double hydraulic cylinders are adopted for lifting, sometimes the lifting transverse stability and rigidity have certain fluctuation due to the fact that the position of the lifting upper loading mass center is constantly changed, the environment change range of the special vehicle in working use is wide, the requirements on the maintaining precision and the transmission control precision of the lifting height of the magazine box are high, the motion response is fast, and the requirements on the rigidity of the lifting assembly and the transverse stability of the lifting frame are high.
Disclosure of Invention
In order to solve the technical problem at least to a certain extent, the invention provides a lifting device.
The technical scheme adopted by the invention is as follows:
a lifting device comprises a base, a lifting frame, a lifting assembly and a driving assembly; the lifting frame is rotatably connected with the base; one end of the lifting component is rotatably connected with the lifting frame, and the other end of the lifting component is rotatably connected with one end of the base far away from the lifting frame; the driving assembly is arranged on the base and is used for driving the lifting assembly to extend or shorten; the lifting assembly comprises a ball screw pair, a positioning sleeve and a supporting rod, the positioning sleeve is sleeved at the end part of a screw rod of the ball screw pair, the positioning sleeve is rotatably connected with the base, one end of the supporting rod is rotatably connected with the lifting frame, and the other end of the supporting rod is connected with a nut of the ball screw pair; the driving assembly comprises a servo motor, and the output end of the servo motor is in transmission connection with a screw of the ball screw pair.
In a possible design, the driving assembly further comprises a speed reducer, the output end of the servo motor is connected with the input end of the speed reducer, a first bevel gear is fixedly sleeved at the output end of the speed reducer, a second bevel gear is fixedly sleeved on a screw of the ball screw pair in a matching manner, and the second bevel gear is meshed with the first bevel gear.
In one possible design, an output shaft of the speed reducer is connected with a connecting rod through a coupler, and the first bevel gear is fixedly sleeved on the connecting rod; the output shaft of speed reducer sets up to two, two output shaft rotational speeds of speed reducer are synchronous, two output shafts of lifting unit cooperation speed reducer are provided with two sets ofly, and two sets of lifting unit concerted movement and stop.
In one possible design, the lifting device further comprises an inclinometer and a controller, wherein the inclinometer is arranged on the lifting frame; the inclinometer is used for reading the transverse inclination angle data of the lifting frame and sending the inclination angle data to the controller; the controller is used for calculating the transverse height difference of the lifting frame according to the inclination angle data after receiving the inclination angle data, judging whether the transverse height difference of the lifting frame is larger than a threshold value or not, and outputting a stop operation instruction to the servo motor if the transverse height difference of the lifting frame is larger than the threshold value so as to stop the servo motor.
In a possible design, the lifting assembly further comprises a protective sleeve, the protective sleeve is sleeved outside a nut of the ball screw pair, and the protective sleeve is connected with the positioning sleeve.
In one possible design, the lifting assembly further comprises a jaw clutch, the jaw clutch is arranged outside the positioning sleeve, and the jaw clutch is locked with one end, far away from the supporting rod, of the screw rod of the ball screw pair.
In one possible design, the lifting device further comprises an air source control assembly, and the air source control assembly comprises a two-position three-way normally closed solenoid valve, a filter, a stop valve and an air storage cylinder which are sequentially connected with the controlled end of the jaw clutch through an air pipe.
In one possible design, the air supply control assembly further includes a pressure switch for detecting the air pressure in the air tube.
In one possible design, the lifting device further comprises a balancing machine assembly, wherein the balancing machine assembly comprises a plate spring assembly, a transmission rod and a pull rod; the plate spring assembly penetrates through the lifting frame, one end of the plate spring assembly is fixed when the lifting frame is horizontal, and the other end of the plate spring assembly is preset with a required torsion angle; the conveying rod is rotatably connected with one end of the plate spring assembly, two ends of the pull rod are respectively rotatably connected with the conveying rod and the base, the conveying rod, the pull rod, the base and the lifting frame form a four-bar mechanism, and the four-bar mechanism forms a parallelogram.
The invention has the beneficial effects of high positioning precision, quick motion response, double locking and double detection at any position, small transmission clearance, compact structure, high and durable maintaining precision, good mechanical rigidity and higher shock resistance; the double lifting assemblies have good movement synchronism and safety, labor-saving lifting, good longitudinal and transverse stability and strong environmental test capability, and can be suitable for special vehicles. Specifically, in the implementation process of the invention, the servo motor rotates after being electrified so as to drive the screw of the ball screw pair to rotate, so that the nut of the ball screw pair drives the supporting rod to displace along the length direction of the screw of the ball screw pair, and further the telescopic length of the supporting rod is changed. According to the invention, due to the arrangement of the servo motor and the ball screw pair, the problems of poor positioning precision and the like caused by the use of a hydraulic cylinder are avoided, and meanwhile, the problems that in the prior art, the control response speed is low, the control precision is poor, and when the hydraulic cylinder is subjected to certain impact force, the hydraulic oil can be slightly compressed and the like are avoided, so that the service life of the lifting device is longer.
Drawings
FIG. 1 is a schematic view of a lifting apparatus according to the present invention;
FIG. 2 is a schematic diagram of a portion of the structure shown in FIG. 1 and illustrating the principle of the control air path;
FIG. 3 is a schematic illustration of the structure of the balancer assembly of the structure shown in FIG. 1;
FIG. 4 is a side view of a portion of the structure of the lifting device of the structure of FIG. 1;
fig. 5 is an electrical schematic of the device shown in fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In the description of the embodiments of the present invention, the terms "disposed," "mounted," and "connected" should be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
the embodiment provides a lifting device, as shown in fig. 1, including a base 1, a lifting frame 2, a lifting assembly and a driving assembly; the lifting frame 2 is rotatably connected with the base 1; one end of the lifting component is rotatably connected with the lifting frame 2, and the other end of the lifting component is rotatably connected with one end of the base 1 far away from the lifting frame 2; the driving component is arranged on the base 1, is far away from the lifting frame 2 and is used for driving the lifting component to extend or shorten; the lifting assembly comprises a ball screw pair 3, a positioning sleeve 4 and a supporting rod 5, wherein the positioning sleeve 4 is sleeved at the end part of a screw rod of the ball screw pair 3, the positioning sleeve 4 is rotatably connected with the base 1, one end of the supporting rod 5 is rotatably connected with the lifting frame 2, and the other end of the supporting rod 5 is connected with a nut of the ball screw pair 3; the driving assembly comprises a servo motor 6, and the output end of the servo motor 6 is in transmission connection with a screw of the ball screw pair 3.
It should be understood that the servo motor 6 may be in transmission connection with the ball screw pair 3 through the output end thereof, or may be in transmission connection with the ball screw pair through the bevel gear, which is not limited herein.
The positioning precision is high, the motion response is fast, double locking and double detection are carried out at any position, the transmission clearance is small, the structure is compact, the precision is high, durability is realized, the mechanical rigidity is good, and the shock resistance is higher; the double lifting assemblies have good movement synchronism and safety, labor-saving lifting, good longitudinal and transverse stability and strong environmental test capability, and can be suitable for special vehicles. Specifically, in the implementation process of the present embodiment, the servo motor 6 is rotated after being powered on, so as to drive the screw of the ball screw pair 3 to rotate, so that the nut of the ball screw pair 3 drives the support rod 5 to displace along the length direction of the screw of the ball screw pair 3, and further change the telescopic length of the support rod 5, when the support rod 5 displaces towards the screw direction far away from the ball screw pair 3, the support rod can drive the lifting frame 2 to lift up, so as to realize the lifting operation of the object on the surface of the lifting frame 2, otherwise, the lowering operation of the object on the surface of the lifting frame 2 can be realized. In the embodiment, due to the arrangement of the servo motor 6 and the ball screw pair 3, the problems of poor positioning accuracy and the like caused by the use of a hydraulic oil cylinder are avoided, the problem of lifting faults caused by factors such as temperature and the like can be avoided, and the service life of the lifting device is longer.
In this embodiment, the reinforcing ribs are arranged on one side of the lifting frame 2 close to the base 1 and one side of the base 1 close to the lifting frame 2, and the strength of the lifting frame 2 and the strength of the base 1 can be improved due to the arrangement of the reinforcing ribs, so that the overall strength of the lifting device can be improved, the problems of deformation and the like of the lifting device in the using process can be avoided, and meanwhile, the service life of the lifting device can be prolonged.
In this embodiment, the driving assembly further includes a speed reducer 7, as shown in fig. 2, an output end of the servo motor 6 is connected to an input end of the speed reducer 7, an output end of the speed reducer 7 is fixedly sleeved with a first bevel gear 8, a screw of the ball screw pair 3 is fixedly sleeved with a second bevel gear 9 in cooperation with the first bevel gear 8, and the second bevel gear 9 is engaged with the first bevel gear 8. In this embodiment, the output end of the servo motor 6 passes through the positioning sleeve 4 and then is connected with the screw of the ball screw pair 3 through the first bevel gear 8 and the second bevel gear 9 in sequence, so as to drive the screw of the ball screw pair 3 to rotate.
In this embodiment, the speed reducer 7 is used to reduce the rotation speed and increase the output torque.
Specifically, the output shaft of the servo motor 6 is connected with the input end of the speed reducer 7 in a flange holding manner or an external coupling 10 connection manner.
In this embodiment, the arrangement of the first bevel gear 8 and the second bevel gear 9 can vertically arrange the lifting assembly and the driving assembly, thereby being beneficial to saving the assembly space of the lifting assembly and the driving assembly on the base 1.
In this embodiment, in order to achieve maximum transmission efficiency, the taper of the first bevel gear 8 is equal to the taper of the second bevel gear 9, that is, the bevel angle is 45 degrees, and at this time, the extending direction of the output end of the speed reducer 7 is perpendicular to the rotation plane of the lifting frame 2.
In this embodiment, the output shaft of the speed reducer 7 is connected to a connecting rod 11 through a coupling 10, and the first bevel gear 8 is fixedly sleeved on the connecting rod 11; the two output shafts of the speed reducer 7 are arranged in pairs, the rotating speeds of the two output shafts of the speed reducer 7 are synchronous, the two groups of lifting assemblies are arranged in a manner of being matched with the two output shafts of the speed reducer 7, and the two groups of lifting assemblies move and stop in a coordinated manner.
In this embodiment, the coupling 10 may be, but is not limited to, a non-metal star coupling 10.
It should be noted that two output shafts of the speed reducer 7 are provided, the rotation speeds of the two output shafts are synchronous, and two sets of lifting assemblies are provided in cooperation with the two output shafts of the speed reducer 7, the output shafts of the speed reducer 7 are connected with an input shaft (i.e., a connecting rod 11) of the first bevel gear 8 through a coupler 10, and in the using process, the speed reduction motor rotates, and can drive the second bevel gear 9 to rotate through the first bevel gear 8, so as to drive the lifting assemblies to extend or shorten along the extending direction of the lifting assemblies, thereby realizing the lifting operation of the lifting frame 2.
In the embodiment, two output shafts of the lifting assembly matched with the speed reducer 7 are arranged in two groups, and the lifting assembly is driven by the double ball screw pairs 3, so that the lifting rigidity is increased, the transverse stability of the lifting frame 2 is improved, and the positioning precision in the lifting process is further improved.
In this embodiment, the lifting device further includes an inclinometer 12 and a controller, wherein the inclinometer 12 is arranged on the lifting frame 2; the inclinometer 12 is used for reading the transverse inclination angle data of the lifting frame 2 and sending the inclination angle data to the controller; the controller is used for calculating the transverse height difference of the lifting frame 2 according to the inclination angle data after receiving the inclination angle data, judging whether the transverse height difference of the lifting frame 2 is larger than a threshold value, namely judging whether the stroke difference value of the transmission of the left and right ball screw pairs is within an allowable design range, and if so, outputting a stop operation instruction to the servo motor 6 so as to stop the servo motor 6. It should be noted that, in this embodiment, the inclinometer 12, the servo motor 6 and the speed reducer 7 are all electrically connected to the controller, and the inclinometer 12 and the controller are arranged, so that in this embodiment, the servo motor 6 and the ball screw pairs 3 can be controlled to transmit according to the lateral height difference of the lifting frame 2, synchronous operation of the two ball screw pairs 3 can be well ensured, and thus the safety of the lifting frame 2 in the operation process is improved.
In this embodiment, when the lifting frame 2 is attached to the base 1, and the lifting frame 2 and the base 1 are placed horizontally, the inclinometer 12 is initialized, and the count value of the inclinometer 12 is set to 0 at this time, and when the lifting frame 2 rotates around the base 1 in the implementation process of this embodiment, the inclinometer 12 outputs the inclination angle data of the lifting frame 2 to the controller in real time, so that the controller can calculate the transverse height difference of the lifting frame 2.
In this embodiment, the controller may be, but is not limited to, a single chip microcomputer of the type STM32 series.
It should be noted that, the friction resistance between the screw rod and the nut in the ball screw pair is small, so that the ball screw pair has the characteristics of high precision, reversibility and high efficiency, and the transmission efficiency and precision of the lifting assembly are convenient to improve.
In this embodiment, the lifting assembly further comprises a protective sleeve 13, the protective sleeve 13 is sleeved outside the nut of the ball screw pair 3, and the protective sleeve 13 is connected with the positioning sleeve 4. It should be noted that the protective sleeve 13 may be used to protect the nut and the screw of the ball screw assembly 3, so as to avoid the problems of damage and pollution of the ball screw assembly 3.
In this embodiment, position sleeve 4 sets up the tip at base 1, and base 1's height is by keeping away from the one end of position sleeve 4 to the one end increase that is close to position sleeve 4 to can avoid the vice 3 restricted problem in the operation process of ball under the prerequisite of guaranteeing base 1 bulk strength.
In the prior art, when the hydraulic cylinder is adopted to drive the lifting frame 2 to lift, a certain transmission gap is formed in the position of the lifting frame 2 and cannot be eliminated, if the transmission gap is too large, impact can be caused between mechanical structures, the abrasion of parts is accelerated, the service life of the whole device is influenced, the failure rate is high, and meanwhile, the working precision and the output performance of the device can be influenced. To solve the technical problem in the prior art, the present embodiment further improves the following: the lifting assembly further comprises a jaw clutch 14, the jaw clutch 14 is arranged outside the positioning sleeve 4, and the jaw clutch 14 and one end, far away from the supporting rod 5, of the screw rod of the ball screw pair 3 are locked, so that the jaw clutch 14 can directly lock the screw rod of the ball screw pair 3, and the middle locking transmission gap is reduced.
In this embodiment, the lifting device further includes an air source control component, and the air source control component includes a two-position three-way normally closed solenoid valve 20, a filter 21, a stop valve 22, and an air cylinder 23, which are sequentially connected to the controlled end of the jaw clutch 14 through an air pipe 19. In this embodiment, an electrical schematic diagram of the two-position three-way normally closed solenoid valve 20 is shown in fig. 5, and it should be noted that the arrangement of the air source control assembly can facilitate the direct locking and unlocking of the screw of the ball screw pair 3 by the jaw clutch 14 by energizing the two-position three-way normally closed solenoid valve 20.
Further, the air supply control assembly further comprises a pressure switch 18, and the pressure switch 18 is used for detecting the air pressure in the air pipe 19. It should be noted that the locking state of the lifting assembly can be fed back through the pressure switch 18, so as to realize accurate control of the ball screw pair 3.
It should be noted that the jaw clutch 14 is controlled by a two-position three-way normally closed solenoid valve 20, and the locking operation of the ball screw pair 3 is realized by sucking compressed air, specifically, when the lifting assembly extends and the lifting frame 2 is subjected to a certain external acting force, the lifting frame 2 may slightly move due to a transmission gap to eliminate the gap, and then the external acting force is resisted by the self rigidity strength. When the locking device does not work at ordinary times, one tooth surface of the jaw clutch 14 is directly fixed on the ball screw pair, no transmission gap exists, when the ball screw pair needs to be locked, compressed gas enters into the jaw clutch 14, the other tooth surface of the jaw clutch 14 is pushed by the compressed gas, the tooth surface is meshed with the previous tooth surface, and the effect of locking the ball screw pair is achieved. The provision of the dog clutch 14 can significantly reduce costs and improve the security of the locking of the lifting assembly.
It should be further noted that, in the whole lifting process, the inclinometer 12 on the lifting frame 2 can detect the horizontal inclination angle data of the lifting frame 2 at any time, and when the lifting frame is lifted in place, the two-position three-way normally closed electromagnetic valve 20 is powered on, so that the compressed gas pushes the jaw clutch 14 to directly lock the screw of the ball screw pair 3, and meanwhile, the servo motor 6 is powered off to lock the internal contracting brake, thereby playing the role of double locking at any position.
In this embodiment, the lifting device further comprises a balancing machine assembly, as shown in fig. 3 and 4, which comprises a leaf spring assembly 15, a transfer bar 16 and a pull bar 17; the plate spring assembly 15 is arranged in the lifting frame 2 in a penetrating mode, when the lifting frame 2 is horizontal, one end of the plate spring assembly is fixed, and the other end of the plate spring assembly is preset with a required torsion angle; the conveying rod 16 is rotatably connected with one end of the plate spring assembly 15, two ends of the pull rod 17 are respectively rotatably connected with the conveying rod 16 and the base 1, the base 1 is rotatably connected with the lifting frame 2, the conveying rod 16, the pull rod 17, the base 1 and the lifting frame 2 form a four-bar mechanism, and the four-bar mechanism is combined into an ABCD parallelogram. By means of the arrangement, the torsion angle and the torque value generated by the plate spring assembly 15 are the same as the angle lifted by the lifting frame 2 and the torque value transmitted to the lifting frame, and the two values are in a linear relation and are convenient to control. Further, in this embodiment, the balancing machine subassembly is provided with two sets ofly, and two sets of balancing machine subassemblies symmetry set up, and all are located the left and right sides of base 1 and lifting frame 2 to in increase the transverse stability effect.
It should be noted that, when the lifting frame 2 is horizontal, the balancer assembly can pre-twist the plate spring assembly 15 by a certain angle, so that the lifting torque of the servo motor 6 can be greatly reduced, a relatively small servo motor 6 can be selected, and the assembly cost can be reduced.
In this embodiment, two groups of the balancing machine rods are arranged, and the two groups of the balancing machine rods are oppositely arranged on the left side and the right side of the lifting frame 2, so that the transverse stability of the lifting frame 2 in the motion process can be improved.
The working principle of the embodiment is as follows: when the lifting frame 2 in the lifting device needs to be lifted, whether the jaw clutch 14 and the servo motor 6 are in an unlocking state can be checked firstly, then power is generated through a vehicle-mounted generator, the servo motor 6 is driven to move through electrical control, so that the speed reducer 7 and the ball screw pairs on two sides are driven to move, the lifting frame 2 is pushed to be lifted, and the movement states of the transmission rod 16, the pull rod 17 and the plate spring assembly 15 in the balancer assembly change along with the change of the lifting frame 2. When the lifting frame 2 is lifted to a required position and needs to be stopped, the servo motor 6 is driven to be powered off and locked, and then the control is carried out through the two-position three-way normally closed electromagnetic valve 20, specifically, after the two-position three-way normally closed electromagnetic valve 20 is powered on, the jaw clutch 14 is inflated, and the ball screw pair device is locked, so that the stability and the position precision of the lifting frame 2 are ensured, and the double locking effect at any position is achieved.
Finally, it should be noted that the present invention is not limited to the above alternative embodiments, and that various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (9)
1. A lifting device comprises a base (1), a lifting frame (2), a lifting assembly and a driving assembly; the lifting frame (2) is rotatably connected with the base (1); one end of the lifting component is rotatably connected with the lifting frame (2), and the other end of the lifting component is rotatably connected with one end of the base (1) far away from the lifting frame (2); the driving assembly is arranged on the base (1) and is used for driving the lifting assembly to extend or contract; the method is characterized in that: the lifting assembly comprises a ball screw pair (3), a positioning sleeve (4) and a supporting rod (5), the positioning sleeve (4) is sleeved at the end part of a screw rod of the ball screw pair (3), the positioning sleeve (4) is rotatably connected with the base (1), one end of the supporting rod (5) is rotatably connected with the lifting frame (2), and the other end of the supporting rod (5) is connected with a nut of the ball screw pair (3); the driving assembly comprises a servo motor (6), and the output end of the servo motor (6) is in transmission connection with the screw of the ball screw pair (3).
2. A lifting device as claimed in claim 1, characterized in that: the driving assembly further comprises a speed reducer (7), the output end of the servo motor (6) is connected with the input end of the speed reducer (7), the output end of the speed reducer (7) is fixedly provided with a first bevel gear (8), a screw rod of the ball screw pair (3) is fixedly provided with a second bevel gear (9) in a matched mode, and the second bevel gear (9) is meshed with the first bevel gear (8).
3. A lifting device as claimed in claim 2, characterized in that: an output shaft of the speed reducer (7) is connected with a connecting rod (11) through a coupler (10), and the first bevel gear (8) is fixedly sleeved on the connecting rod (11); the two output shafts of the speed reducer (7) are arranged in pairs, the rotating speeds of the two output shafts of the speed reducer (7) are synchronous, the two groups of lifting assemblies are arranged in a manner of being matched with the two output shafts of the speed reducer (7), and the two groups of lifting assemblies move and stop in a coordinated manner.
4. A lifting device as claimed in claim 1, characterized in that: the lifting device further comprises an inclinometer (12) and a controller, wherein the inclinometer (12) is arranged on the lifting frame (2); the inclinometer (12) is used for reading the transverse inclination angle data of the lifting frame (2) and sending the inclination angle data to the controller; the controller is used for calculating the transverse height difference of the lifting frame (2) according to the inclination angle data after receiving the inclination angle data, judging whether the transverse height difference of the lifting frame (2) is larger than a threshold value or not, and outputting a stop operation instruction to the servo motor (6) if the transverse height difference of the lifting frame (2) is larger than the threshold value so as to stop the servo motor (6) from operating.
5. A lifting device as claimed in claim 1, characterized in that: the lifting assembly further comprises a protective sleeve (13), the protective sleeve (13) is sleeved outside the nut of the ball screw pair (3), and the protective sleeve (13) is connected with the positioning sleeve (4).
6. A lifting device as claimed in claim 1, characterized in that: the lifting assembly further comprises a jaw clutch (14), the jaw clutch (14) is arranged outside the positioning sleeve (4), and the jaw clutch (14) and a screw rod of the ball screw pair (3) are locked at one end far away from the supporting rod (5).
7. A lifting device according to claim 6, characterised in that: the lifting device further comprises an air source control assembly, and the air source control assembly comprises a two-position three-way normally closed electromagnetic valve (20), a filter (21), a stop valve (22) and an air storage cylinder (23) which are sequentially connected with the controlled end of the jaw clutch (14) through an air pipe (19).
8. A lifting device according to claim 7, characterized in that: the air supply control assembly further comprises a pressure switch (18), and the pressure switch (18) is used for detecting the air pressure in the air pipe (19).
9. A lifting device as claimed in claim 1, characterized in that: the lifting device further comprises a balancing machine assembly, wherein the balancing machine assembly comprises a plate spring assembly (15), a transmission rod (16) and a pull rod (17); the plate spring assembly (15) penetrates through the lifting frame (2), one end of the plate spring assembly is fixed when the lifting frame (2) is horizontal, and the other end of the plate spring assembly is preset with a required torsion angle; the conveying rod (16) is rotatably connected with one end of the plate spring assembly (15), two ends of the pull rod (17) are respectively rotatably connected with the conveying rod (16) and the base (1), the conveying rod (16), the pull rod (17), the base (1) and the lifting frame (2) form a four-bar mechanism, and the four-bar mechanism is combined into a parallelogram.
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| CN202210178831.2A CN114476897A (en) | 2022-02-25 | 2022-02-25 | Lifting device |
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| CN202210178831.2A CN114476897A (en) | 2022-02-25 | 2022-02-25 | Lifting device |
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| CN202210178831.2A Pending CN114476897A (en) | 2022-02-25 | 2022-02-25 | Lifting device |
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| CN112196291A (en) * | 2020-09-24 | 2021-01-08 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Adjustable vertical calibration device for plug-in type building prefabricated slab |
| CN113043931A (en) * | 2021-04-02 | 2021-06-29 | 北京易控智驾科技有限公司 | Control method, device, equipment and storage medium for intelligently driving truck |
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| CN203293850U (en) * | 2013-06-26 | 2013-11-20 | 零八一电子集团有限公司 | Torsion bar balancer |
| CN106807020A (en) * | 2016-12-13 | 2017-06-09 | 湖北江山重工有限责任公司 | A kind of leaf spring balancing machine |
| CN109367462A (en) * | 2018-09-21 | 2019-02-22 | 中国重汽集团青岛重工有限公司 | Dumper stability safety control system and method |
| CN112196291A (en) * | 2020-09-24 | 2021-01-08 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Adjustable vertical calibration device for plug-in type building prefabricated slab |
| CN113043931A (en) * | 2021-04-02 | 2021-06-29 | 北京易控智驾科技有限公司 | Control method, device, equipment and storage medium for intelligently driving truck |
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