CN219236917U - Lifting device for small-sized vehicle-mounted equipment - Google Patents

Abstract

The utility model provides a lifting device of small-sized vehicle-mounted equipment, which drives a trapezoidal screw rod of a speed reducer to rotate by a motor or a manual mode, and a nut arranged at the bottom of a movable cylinder is driven by the trapezoidal screw rod to realize the up-and-down lifting of the movable cylinder; the sequence mechanism controls the lifting sequence of the movable cylinders, and the movable rods which do not participate in the movement are locked on the fixed cylinders and kept still; the locking mechanism locks the two adjacent movable cylinders into a whole, so that the lower movable cylinder can push the upper movable cylinder to lift together; the limiting mechanism limits the lifting height, and when the lifting frame is lifted to the highest position and the lifting frame is lowered to the lowest position, the whole mechanism is powered off and locked. The utility model avoids abrasion or movement interference caused by relative movement of adjacent cylinder bodies in the transportation or lifting process, can realize rigid locking at any position in the lifting process, has automatic and manual double working modes, has simple structure and good maintainability, and can more widely meet the lifting requirements of various small-sized vehicle-mounted equipment.

Description

Lifting device for small-sized vehicle-mounted equipment

Technical Field

The utility model relates to the field of vehicle-mounted equipment, in particular to a vehicle-mounted overhead lifting device.

Background

The existing lifting device of the vehicle-mounted equipment mainly comprises a manual lifting device, an electric lifting device and a manual/electric dual-mode lifting device. The manual lifting device generally adopts a steel wire rope to drive and bear the lifting cylinder body to drive equipment to be elevated, and has the defects that firstly, part of the rope is exposed to the external environment for a long time, and is frequently circulated inside and outside a mechanism to bring in pollutants easily, the environmental adaptability is poor, secondly, the rope has elasticity, the repeated positioning performance is poor due to environmental change, thirdly, the bearing capacity is small, and the manual operation is time-consuming and labor-consuming. The electric lifting device is higher in general integration level, each motion control and locking part is often designed at the combination position of the inside and the head of each section of cylinder body, wherein the locking mechanism, the limiting mechanism and the cylinder body are complex in structural design, the specific structure cannot be visually checked outside, the disassembly is difficult, and the site maintainability guarantee is poor.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides the lifting device of the small-sized vehicle-mounted equipment, which has the double working modes of automatic and manual operation, has a simple structure and good maintainability, and can more widely meet the elevated requirements of various small-sized vehicle-mounted equipment.

The technical scheme adopted for solving the technical problems is as follows:

a lifting device of a small-sized vehicle-mounted device comprises a speed reducer of a limiting mechanism part, a fixed cylinder, a movable cylinder, a locking mechanism, a sequence mechanism and a limiting mechanism.

The speed reducer comprises a gear and a trapezoidal screw rod, the lower end of the trapezoidal screw rod is coaxially and fixedly connected with a gear, the gear is meshed with two gears, one of the two meshed gears is coaxially connected with an output shaft of the motor, and the other gear is coaxially connected with the manual rocking handle;

the fixed cylinder is a hollow cylinder, and a limiting hole is formed in the outer side wall of the fixed cylinder; the lower end of the fixed cylinder is fixedly connected with a speed reducer, and the upper end of the fixed cylinder supports the movable cylinder body;

the movable cylinder is a hollow cylinder, and a limiting hole is formed in the outer side wall of the movable cylinder; the screw nut is arranged at the lower end of the cylinder body, so that the screw nut is meshed with the trapezoidal screw, the rotary motion of the screw is converted into the up-down linear motion of the nut, and the cylinder body is driven to move up and down; the rod head is arranged at the top of the cylinder body and used for fixing related components of the locking mechanism, the sequence mechanism and the limiting mechanism;

the limiting mechanism is arranged on the fixed cylinder and comprises a telescopic component, a deflector rod, a pressure rod, a spring and a limiting switch, wherein the two limiting switches are arranged on the outer wall of the fixed cylinder, one of the limiting switches is triggered by the deflector rod to control the motor to be powered off, and the other limiting switch is triggered by the pressure rod to control the motor to be powered off; the driving lever is hinged to the outer wall of the fixed cylinder, one end of the driving lever is positioned at the limit hole of the fixed cylinder, the driving lever penetrates through the limit holes of the fixed cylinder and the movable cylinder to enter the fixed cylinder after the movable cylinder ascends in place, the other end of the driving lever is triggered by the tension of the spring to trigger the limit switch, and the cylinder wall pushes the driving lever to turn over when the movable cylinder descends so as to overcome the tension of the spring and separate from the limit switch; the telescopic components are arranged on the rod heads of the movable cylinders at all levels, each telescopic component is jacked up under the action of a spring, and moves downwards under the extrusion of the rod heads of the movable cylinders at the next level against the action of the spring; the compression bar is jacked up under the action of the spring, the compression bar moves downwards under the action of the telescopic component after the movable cylinder descends in place to trigger the limit switch, and the compression bar moves upwards after the movable cylinder ascends in place to separate from the limit switch;

the sequential mechanism comprises a lock seat, a lock shaft and a spring, wherein the upper end of the lock seat is wedge-shaped, one end of the lock shaft moves towards the inside of the movable cylinder under the action of the spring, penetrates through a limit hole of the movable cylinder wall, and the other end of the lock shaft is provided with a wedge groove which is matched with the lock seat at the previous stage to drive the lock shaft to move outwards and separate from the limit hole of the movable cylinder wall;

the locking mechanism comprises a lock seat, a lock shaft and a spring, wherein a through hole is formed in the lock seat, one end of the lock shaft moves towards the inside of the movable cylinder under the action of the spring, penetrates through the movable cylinder wall to enter a limit hole of the next-stage movable cylinder, and pushes the lock shaft to overcome the action of the spring when the next-stage movable cylinder descends in place, so that the lock shaft enters the lock seat of the previous-stage movable cylinder.

The plurality of movable cylinders are arranged, one movable cylinder is coaxially arranged in the fixed cylinder, the other movable cylinders are sequentially coaxially arranged in the upper-stage movable cylinder, and the lower end of the movable cylinder is coaxially and fixedly connected with a screw nut and meshed with the trapezoidal screw; the upper end of the movable cylinder is fixedly connected with a club head with the outer diameter larger than that of the movable cylinder, and the upper end surface of the club head is provided with a sequential mechanism and a locking mechanism.

The limiting mechanism also comprises a box body, the box body is arranged on the fixed cylinder, the telescopic components, the deflector rods, the pressure rods, the springs and the limiting switches are arranged in the box body, the telescopic components are arranged on the rod heads of the movable cylinder, when the telescopic components are withdrawn and lowered, the four rod heads of the uppermost movable cylinder descend to the preset lowest position, the telescopic components at all levels are compressed, and are transmitted layer by layer and finally transmitted to the pressure rods, the limiting switch contact pieces are compressed, the lowering signals are triggered, the mechanism is powered off and stops moving, so that the whole mechanism is locked and kept in a retracted state, and when the movable cylinder is erected and ascends, the deflector rods are pulled by the springs, the limiting switch contact pieces are compressed, the ascending signals are triggered, the mechanism is powered off and stops moving, and the whole mechanism is locked and kept in an erect state.

The beneficial effects of the utility model are as follows:

1) In the transportation or lifting process, the movable cylinders and the fixed cylinders are locked together all the time, so that the adjacent cylinders are prevented from relative movement to cause abrasion or movement interference; when the erection rises, the movable cylinder IV, the movable cylinder III, the movable cylinder II and the movable cylinder I are driven to rise step by step in sequence, the upper section of movable cylinder is locked with the next section of movable cylinder into a whole after rising in place, the movable cylinder at the lower stage is pushed to continue rising, and all the cylinders are locked into a whole and keep in the state after all the cylinders rise in place; when the movable cylinder is withdrawn and lowered, the movable cylinder I, the movable cylinder II, the movable cylinder III and the movable cylinder IV are sequentially driven to be lowered step by step, the movable cylinder lowered in place is locked with the fixed cylinder, all the cylinder bodies are locked into a whole after being lowered in place, the state is kept, the motionless movable cylinder and the fixed cylinder are locked into a whole, and the relative movement of adjacent cylinder bodies in the transportation or lifting process is avoided, so that abrasion or motion interference is caused.

2) The trapezoidal screw rod with the self-locking function is used for transmission, so that the rigid locking of any position in the lifting process can be realized.

3) The manual and electric double working modes are provided, and the manual and electric double working mode is suitable for various working occasions.

4) All mechanisms are visible and detachable from outside, so that the maintenance is good, and the maintenance and the replacement are convenient.

Drawings

FIG. 1 is a front and side cross-sectional view of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of the structure of the speed reducer of the present utility model;

FIG. 3 is a schematic diagram of the structure of the first cylinder of the present utility model;

FIG. 4 is a schematic diagram of a spacing mechanism according to the present utility model;

FIG. 5 is a schematic diagram of the sequencing mechanism of the present utility model;

FIG. 6 is a schematic structural view of the locking mechanism of the present utility model;

FIG. 7 (a) shows a state that a second lock shaft of a locking mechanism mounted on a first rod head of a movable cylinder extends out under the action of elastic force; the state shown in fig. 7 (b) is that the movable cylinder one (3) and the movable cylinder two (4) continue to descend together; FIG. 7 (c) shows a state that a first lock shaft of a sequential mechanism arranged on a first rod head of a movable cylinder stretches out rightwards under the sliding action of a wedge groove inclined surface on the right side of a second movable cylinder;

FIG. 8 is a block diagram of the utility model raised into position;

in the figure, a 1-speed reducer, a 2-fixed cylinder, a 3-movable cylinder I, a 4-movable cylinder II, a 5-movable cylinder III, a 6-movable cylinder IV, a 7-limit mechanism, an 8-sequential mechanism, a 9-locking mechanism, an 11-trapezoidal screw, a 12-base, a 13-box body, a 14-motor, a 15-pinion I, a 16-pinion II, a 17-large gear, an 18-bearing, a 31-screw nut, a 32-cylinder body, a 33-rod head, a 34-sequential lock seat, a 35-locking mechanism tongue, a 71-box body, a 72-deflector rod, a 73-spring I, a 74-limit switch II, a 76-spring II, a 77-press rod, a 78-telescopic component, a 81-lock seat I, a 82-lock shaft I, a 83-spring III, a 91-lock seat II, a 92-lock shaft II and a 93-spring IV.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

The utility model provides a lifting device of small-sized vehicle-mounted equipment, which is realized by a simple and modularized lifting mechanism and a lifting locking method.

The speed reducer consists of a box body, a motor, a large gear, a pinion I, a pinion II, a bearing, a base and a trapezoidal screw rod. Wherein the box body realizes the supporting function of gears, bearings, bases and trapezoidal screw rods in the box body; in the electric mode, the motor drives the first pinion to rotate, the first pinion drives the large gear to rotate, and the large gear drives the trapezoidal screw rod to rotate; in the manual mode, the pinion II is manually rotated to drive the large gear to rotate, and the large gear drives the trapezoidal screw to rotate; the speed reducer integrally plays roles of speed reduction, support and transmission;

the fixed cylinder plays a role in middle transition, the lower end of the fixed cylinder is integrated with the speed reducer and the vehicle body, and the upper part of the fixed cylinder supports the inner movable cylinder body.

The first movable cylinder, the second movable cylinder, the third movable cylinder and the fourth movable cylinder are composed of a cylinder body, a screw nut, a rod head, a sequential lock seat and a lock tongue of a locking mechanism. The screw nut is arranged at the lower end of the cylinder body, so that the screw nut is meshed with the trapezoidal screw, the rotary motion of the screw is converted into the up-down linear motion of the nut, and the cylinder body is driven to move up and down; the club head is arranged at the top of the cylinder body and used for fixing related components of the locking mechanism, the sequence mechanism and the limiting mechanism.

The limiting mechanism consists of a box body, a telescopic component, a deflector rod, a pressing rod, a first spring, a second spring, a first limiting switch and a second limiting switch. The box body is arranged on the fixed cylinder, the deflector rod, the compression bar, the first spring, the second spring and the limit switch are arranged in the box body, and the telescopic components are arranged on the rod heads of the movable cylinder bodies. When the four heads of the uppermost movable cylinder are retracted and lowered to the preset lowest position, the telescopic assemblies of all stages are compressed, and finally transferred to the compression bar layer by layer to compress the second contact of the limit switch, trigger the lowering signal, and the mechanism is powered off and stops moving, so that the whole mechanism is locked and kept in a retracted state. When the frame rises, the first movable cylinder rises to the proper position, the first spring pulls the deflector rod, the first limit switch is compressed, the rising to the proper position signal is triggered, the mechanism is powered off to stop moving, and the whole mechanism is locked and kept in the erection state.

The sequence mechanism consists of a first lock seat, a first lock shaft and a third spring. The first lock seat is arranged on the rod head of the movable cylinder, and the external force generated by the inclined plane of the wedge groove on the upper-stage movable cylinder and the three-phase interaction of the spring drive the first lock shaft to move left and right, so that the first lock seat is separated from or inserted into the sequential lock seat, and the sequential unlocking and locking of the movable cylinder in the lifting process are realized.

The locking mechanism consists of a second lock seat, a second lock shaft and a fourth spring. The second lock seat is arranged on the rod head of the movable cylinder, and a locking mechanism lock tongue and a spring which are arranged on the rod head of the next stage are interacted with each other to drive the second lock shaft to move left and right, so that the second lock seat is separated from or inserted into a lock hole on the movable cylinder of the previous stage, and the lifting and withdrawing processes and the locking and unlocking of the adjacent movable cylinders are realized.

The working principle of the utility model is that the trapezoidal screw rod of the speed reducer is driven to rotate by a motor or a manual mode, and the nut arranged at the bottom of the movable cylinder is driven by the trapezoidal screw rod to realize the up-and-down lifting of the movable cylinder; the sequence mechanism controls the lifting sequence of the movable cylinders, and the movable rods which do not participate in the movement are locked on the fixed cylinders and kept still; the locking mechanism locks the two adjacent movable cylinders into a whole, so that the lower movable cylinder can push the upper movable cylinder to lift together; the limiting mechanism limits the lifting height, and when the lifting frame is lifted to the highest position and the lifting frame is lowered to the lowest position, the whole mechanism is powered off and locked.

The lifting device comprises a speed reducer, a fixed cylinder, a first movable cylinder, a second movable cylinder, a third movable cylinder, a fourth movable cylinder, a locking mechanism, a sequence mechanism and a limiting mechanism, wherein the movable cylinder, the locking mechanism, the sequence mechanism and the limiting mechanism are precisely matched to complete complex multi-cylinder continuous lifting movement, and the lifting device is a key component with high failure rate. The utility model adopts the design thought of modularization and easy maintenance, has simple structure of each part, can observe and check the outside of the movement process, can rapidly locate the outfield fault and implement on-site maintenance or part replacement, improves the maintainability and the guarantee of the outfield of the equipment, saves time and labor cost, and especially has great attention on the capability of military equipment.

As shown in fig. 1, the embodiment of the present utility model provides a lifting device for a small-sized vehicle-mounted device, which comprises a speed reducer 1, a fixed cylinder 2, a movable cylinder one 3, a movable cylinder two 4, a movable cylinder three 5, a movable cylinder four 6, a limiting mechanism 7, a sequence mechanism 8 and a locking mechanism 9.

The reducer 1 is composed of a trapezoidal screw 11, a base 12, a box 13, a motor 14, a first pinion 15, a second pinion 16, a large gear 17 and a bearing 18, as shown in fig. 2. The first pinion 15 is a transmission gear in an electric mode, and is driven by a motor to drive the large gear 17 and the trapezoidal screw 11 to rotate; the pinion II 16 is a transmission gear in a manual mode, and drives the large gear 17 and the trapezoidal screw 11 to rotate through the rotation of a manual tool; the two pinion gears are in a parallel mode, and are driven by an electric mode in normal operation, and a pinion gear II 16 in a manual mode rotates along with the rotation; in the case of a power failure, the manual mode is used, the pinion 16 and the motor 14 in the electric mode are free from moment generation, and free from resistance follow-up idle running.

The movable cylinder takes a movable cylinder I3 as an example, and consists of a screw nut 31, a cylinder body 32, a rod head 33, a sequential lock seat 34 and a locking mechanism lock tongue 35, as shown in fig. 3. The screw nut 31 converts the screw rotation motion into up-down linear motion, the cylinder 32 plays a role of middle support, and the rod head 33 is provided with a telescopic assembly 78 of the sequential mechanism 8, the locking mechanism 9, the sequential lock seat 34, the locking mechanism lock tongue 35 and the limiting mechanism.

The limiting mechanism 7 consists of a box body 71, a deflector rod 72, a first spring 73, a first limiting switch 74, a second limiting switch 75, a second spring 76, a pressing rod 77 and a telescopic component 78, as shown in fig. 4. When each stage of movable cylinders ascend, each telescopic component 78 is driven to ascend and separate, the pressure disappears, the compression rod 77 ascends under the elasticity of the second spring 76, so that the compression rod is separated from the elastic piece of the second limit switch 75, and the second limit switch 75 is reset; when all the movable cylinders are lifted in place, the first spring 73 pulls the deflector rod 72 to rotate, the elastic piece of the first limit switch 74 is pressed, and the system is powered off and locked. When each stage of movable cylinder descends, the descending movable cylinder extrudes the deflector rod 72 to rotate, so that the deflector rod is separated from the elastic piece of the limit switch I74, and the limit switch I74 is reset; as the following movable cylinder descends, the telescopic components 78 at each stage are driven to compress downwards, the compression rod 77 is pushed to downwards press and touch the elastic piece of the limit switch II 75, the movable cylinder descends to the position, and the system is locked in a power-off mode.

The sequence mechanism 8 is composed of a first lock seat 81, a first lock shaft 82 and a third spring 83, as shown in fig. 5. The first lock shaft 82 can move left and right under the action of external force and the third spring 83, so that locking and unlocking are realized.

The locking mechanism 9 is composed of a second lock seat 91, a second lock shaft 92 and a fourth spring 93, as shown in fig. 6. The second lock shaft 92 can move left and right under the action of external force and the fourth spring 93, so that locking and unlocking are realized.

In the whole structure, the speed reducer and the fixed cylinder are installed as a whole, and are installed on the vehicle carrying platform, and the speed reducer is a fixed part and the other parts are movable parts. When the elevator is in operation, the trapezoidal screw rod of the speed reducer sequentially drives the first movable cylinder 3, the second movable cylinder 4, the third movable cylinder 5 and the fourth movable cylinder 6 to ascend and descend; when the frame rises, the upper movable cylinders are locked into a whole by a locking mechanism on the lower movable cylinders after rising in place, then the lower movable cylinders are pushed to continue rising, after all the movable cylinders rise in place, the last movable cylinders rising in sequence trigger a limiting mechanism after rising in place, and the whole mechanism is powered off, kept and locked; when the movable cylinders are withdrawn and lowered, the upper movable cylinders are lowered to the proper positions and then locked by the sequence mechanism on the rod heads of the movable cylinders which are lowered to the proper positions, and after all the movable cylinders are withdrawn to the proper positions, the last movable cylinder which is lowered in sequence triggers the limit mechanism, so that the whole mechanism is powered off, kept and locked. In the descending and ascending processes, the locking and unlocking principle between the adjacent movable cylinders and the fixed cylinders is shown in fig. 7.

Fig. 7 (a) shows a state that a second lock shaft 92 of a locking mechanism 9 arranged on the rod head of a first movable cylinder 3 stretches out under the action of elasticity and is inserted into a lock hole on the left side of a second movable cylinder 4 to lock the two movable cylinders into a whole, the two movable cylinders are driven by a trapezoidal screw pair to descend, the first movable cylinder 3 is about to return to the inside of a fixed cylinder 2, and a first lock shaft 82 of a sequence mechanism 8 is positioned in a wedge groove on the right side of the second movable cylinder 4 under the action of elasticity.

As shown in fig. 7 (b), the first movable cylinder 3 and the second movable cylinder 4 continue to descend together, the first movable cylinder 3 descends to a proper position, the sequential lock seat 34 on the rod head of the fixed cylinder 2 and the lock mechanism lock tongue 35 penetrate through the rod head 33 of the first movable cylinder 3, the lock mechanism lock tongue 35 is inserted into the left chute of the lock shaft second 92 of the lock mechanism 9 to push the lock shaft second 92 out leftwards, unlocking separation of the first movable cylinder 3 and the second movable cylinder 4 is achieved, the first movable cylinder 3 descends to a proper position and is not moved, and the second movable cylinder 4 continues to descend under the drive of the screw pair.

As shown in fig. 7 (c), after the movable cylinder two 4 continues to descend for a certain distance, the first lock shaft 82 of the sequential mechanism 8 mounted on the rod head of the movable cylinder one 3 extends rightward under the sliding action of the wedge groove inclined surface on the right side of the movable cylinder two 4 and is inserted into the sequential lock seat 34 on the rod head of the fixed cylinder 2, so that the movable cylinder one 3 and the fixed cylinder 2 are locked into a whole.

The descending and locking mechanisms of the second movable cylinder 4, the third movable cylinder 5 and the fourth movable cylinder 6 are unlocked, and the locking principle of the sequential mechanism is the same as that of the first movable cylinder.

The ascending process of each movable cylinder is opposite to the descending process principle, and the state of the whole mechanism after ascending is shown in fig. 8.

Claims (2)

1. The utility model provides a small-size vehicle-mounted equipment's elevating gear, includes reduction gear, fixed cylinder, movable cylinder, locking mechanical system, order mechanism and stop gear, its characterized in that:

in the lifting device of the small-sized vehicle-mounted equipment, the speed reducer comprises a gear and a trapezoidal screw, the lower end of the trapezoidal screw is coaxially and fixedly connected with a gear, the gear is meshed with two gears, one of the meshed two gears is coaxially connected with an output shaft of a motor, and the other gear is coaxially connected with a manual rocking handle;

the fixed cylinder is a hollow cylinder, and a limiting hole is formed in the outer side wall of the fixed cylinder; the lower end of the fixed cylinder is fixedly connected with a speed reducer, and the upper end of the fixed cylinder supports the movable cylinder body;

the movable cylinder is a hollow cylinder, and a limiting hole is formed in the outer side wall of the movable cylinder; the screw nut is arranged at the lower end of the cylinder body, so that the screw nut is meshed with the trapezoidal screw, the rotary motion of the screw is converted into the up-down linear motion of the nut, and the cylinder body is driven to move up and down; the rod head is arranged at the top of the cylinder body and used for fixing related components of the locking mechanism, the sequence mechanism and the limiting mechanism;

the limiting mechanism is arranged on the fixed cylinder and comprises a telescopic component, a deflector rod, a pressure rod, a spring and a limiting switch, wherein the two limiting switches are arranged on the outer wall of the fixed cylinder, one of the limiting switches is triggered by the deflector rod to control the motor to be powered off, and the other limiting switch is triggered by the pressure rod to control the motor to be powered off; the driving lever is hinged to the outer wall of the fixed cylinder, one end of the driving lever is positioned at the limit hole of the fixed cylinder, the driving lever penetrates through the limit holes of the fixed cylinder and the movable cylinder to enter the fixed cylinder after the movable cylinder ascends in place, the other end of the driving lever is triggered by the tension of the spring to trigger the limit switch, and the cylinder wall pushes the driving lever to turn over when the movable cylinder descends so as to overcome the tension of the spring and separate from the limit switch; the telescopic components are arranged on the rod heads of the movable cylinders at all levels, each telescopic component is jacked up under the action of a spring, and moves downwards under the extrusion of the rod heads of the movable cylinders at the next level against the action of the spring; the compression bar is jacked up under the action of the spring, the compression bar moves downwards under the action of the telescopic component after the movable cylinder descends in place to trigger the limit switch, and the compression bar moves upwards after the movable cylinder ascends in place to separate from the limit switch;

the sequential mechanism comprises a lock seat, a lock shaft and a spring, wherein the upper end of the lock seat is wedge-shaped, one end of the lock shaft moves towards the inside of the movable cylinder under the action of the spring, penetrates through a limit hole of the movable cylinder wall, and the other end of the lock shaft is provided with a wedge groove which is matched with the lock seat at the previous stage to drive the lock shaft to move outwards and separate from the limit hole of the movable cylinder wall;

the locking mechanism comprises a lock seat, a lock shaft and a spring, wherein a through hole is formed in the lock seat, one end of the lock shaft moves towards the inside of the movable cylinder under the action of the spring, penetrates through the movable cylinder wall to enter a limit hole of the next-stage movable cylinder, and pushes the lock shaft to overcome the action of the spring when the next-stage movable cylinder descends in place and enters the lock seat of the previous-stage movable cylinder;

the limiting mechanism also comprises a box body, the box body is arranged on the fixed cylinder, the telescopic components, the deflector rods, the pressure rods, the springs and the limiting switches are arranged in the box body, the telescopic components are arranged on the rod heads of the movable cylinder, when the telescopic components are withdrawn and lowered, the four rod heads of the uppermost movable cylinder descend to the preset lowest position, the telescopic components at all levels are compressed, and are transmitted layer by layer and finally transmitted to the pressure rods, the limiting switch contact pieces are compressed, the lowering signals are triggered, the mechanism is powered off and stops moving, so that the whole mechanism is locked and kept in a retracted state, and when the movable cylinder is erected and ascends, the deflector rods are pulled by the springs, the limiting switch contact pieces are compressed, the ascending signals are triggered, the mechanism is powered off and stops moving, and the whole mechanism is locked and kept in an erect state.

2. The lifting device of the small-sized vehicle-mounted apparatus according to claim 1, characterized in that:

the plurality of movable cylinders are arranged, one movable cylinder is coaxially arranged in the fixed cylinder, the other movable cylinders are sequentially coaxially arranged in the upper-stage movable cylinder, and the lower end of the movable cylinder is coaxially and fixedly connected with a screw nut and meshed with the trapezoidal screw; the upper end of the movable cylinder is fixedly connected with a club head with the outer diameter larger than that of the movable cylinder, and the upper end surface of the club head is provided with a sequential mechanism and a locking mechanism.

Images