WO2014056156A1

WO2014056156A1 - Shelter lifting mechanism

Info

Publication number: WO2014056156A1
Application number: PCT/CN2012/082702
Authority: WO
Inventors: 余应林
Original assignee: 四川加力机电有限公司
Priority date: 2012-10-09
Filing date: 2012-10-10
Publication date: 2014-04-17
Also published as: CN102862928A; CN102862928B

Abstract

Disclosed is a shelter lifting mechanism, which comprises a movable supporting rod (2) arranged inside a sleeve (1) and a driving device for driving the movable supporting rod (2) and the sleeve (1) to move relatively. The sleeve (1) is provided with a first chain wheel (3a) and a second chain wheel (3b). The first chain wheel (3a) is arranged above the second chain wheel (3b), a chain (4) is connected between the first chain wheel (3a) and the second chain wheel (3b) in matching mode, the chain (4) is arranged inside the sleeve (1), the driving device drives the chain (4) to lift inside the sleeve (1), and the chain (4) drives the movable supporting rod (2) to lift inside the sleeve (1). The chain is adopted for driving the movable supporting rod to lift relatively in the sleeve, the transmission speed ratio is large, the lifting speed is high, manufacturing and installation are convenient, and the shelter lifting mechanism is especially suitable for severe environments such as a sandy and windy environment.

Description

A cabin lifting mechanism

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting mechanism, and more particularly to a cabin lifting mechanism for removing a shelter from a vehicle or loading it into a vehicle. Background technique

The structure of the square cabin is similar to that of a container. It is usually welded by sheet metal. Usually, the cabin is equipped with a carrier and carried by the vehicle to the required place. The standard is also based on the container standard. Higher maneuverability.

Most of the existing square cabins are loaded or unloaded by direct lifting. Not only is the operation cumbersome and time consuming, but also depends on the lifting equipment to complete the loading and unloading operation. For the above problems, the lifting and lowering of the cabin is usually arranged. The device is adjusted by the height of the ground of the opposite cabin of the lifting device to realize self-lifting of the cabin, and finally the bottom of the lifting device is in contact with the ground to support the entire cabin.

For example, in the "Electrical Mechanical Engineering", No. 04, 1990, from page 30 to page 37, the cabin lifting mechanism disclosed in the article "Design of the S5T Cabin Lifting Mechanism", the lifting device is usually hinged to the cabin with a pin. The side surface is retracted in the form of a hinge. Although such a structure can be folded and stored in the transportation to reduce the overall width of the cabin during transportation, the operation efficiency is low and the mobility is poor. When the cabin is unloaded from the vehicle, the lifting device needs to be separately deployed from the side of the cabin, and then the support rod is released vertically downwards, which increases the operation time required for the unloading of the cabin, which is not conducive to the rapid deployment of the cabin.

For example, the Chinese utility model patent "Band cabin container lifting loading and unloading mobile walking device" with application number 200420109260. 4 and the Chinese utility model patent "square cabin lifting device" with application number 200620026397. 2 are all aimed at Improvement of the loading and unloading structure of the cabin, the lifting mechanism passes the spiral The lifting device is linearly lifted and lowered, and the screw lifting mechanism mainly comprises a mechanism of a worm gear mechanism, a screw nut pair, and a ball screw nut pair.

The use of the above lifting mechanism mainly has the following deficiencies:

1. Adopting a linear transmission mechanism such as a worm gear mechanism, a screw nut pair, a ball screw nut pair, etc. to drive the lifting mechanism to perform vertical lifting, which is not only inconvenient in production and manufacture, large in processing volume, high in cost, but also slow in lifting speed and low in efficiency. ;

2. In the harsh environment such as sand and sand, it is easy to get stuck in sand and stone, and the safety and reliability are poor;

3. When the lifting device is used to support the square cabin, the square cabin is easy to tilt due to uneven ground, and the above-mentioned lifting mechanism makes it difficult to adjust the entire cabin to the level, with low efficiency and poor precision;

4. There is no self-locking mechanism, there is a risk that the operator will accidentally land due to misoperation by the operator or even misoperation of the child. Summary of the invention

The object of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a cabin lifting mechanism which is simple in structure, low in cost, fast in lifting speed, and high in efficiency. In order to achieve the above object, the present invention provides the following technical solutions:

A cabin lifting mechanism includes a movable strut disposed inside the sleeve, and a driving device for driving the movable strut and the sleeve relative to the sleeve, the sleeve being provided with a first sprocket and a second sprocket, The first sprocket is located above the second sprocket, a chain is coupled between the first sprocket and the second sprocket, the chain is disposed inside the sleeve, and the driving device drives the chain in the sleeve The internal lifting and lowering, the chain drives the movable strut to rise and fall inside the sleeve; the chain is used to drive the movable strut relative to the lifting and lowering in the sleeve, not only the transmission speed ratio is large, the lifting speed is fast, the efficiency is high, and the cost is low, and the manufacturing and installation are convenient. It is especially suitable for use in harsh environments such as sand and sand, safe and reliable.

Preferably, the driving device is a driving sprocket provided with a power source, and the chain is closed to form a chain a ring, the chain ring is coupled with the first sprocket, the second sprocket, and the drive sprocket and tensioned and pretensioned. Driving the chain in the form of a chain ring is more beneficial to improve the life of the chain and increase the driving force.

Preferably, the first sprocket is disposed at the top of the sleeve, the second sprocket is disposed outside the sleeve, and the side wall of the sleeve is provided with a chain inlet for the chain to penetrate, and the chain is wound After passing through the second sprocket, the chain inlet penetrates into the interior of the sleeve and bypasses the first sprocket and then exits from the opening provided at the top end of the sleeve to the outside of the sleeve. With such a structure, the structure of the drive mechanism of the chain loop is facilitated so that the drive mechanism can be disposed outside the sleeve.

Preferably, the driving sprocket is disposed on the cabin, and at least two connecting rods are disposed between the cabin and the sleeve, and both ends of each connecting rod are respectively hinged with the cabin and the sleeve, The pod, the sleeve and the connecting rod form a parallelogram mechanism that moves in a vertical plane. By connecting the cabin and the lifting device with two connecting rods, the cabin is a frame and the two connecting rods are cranks, and the sleeve is used as a rocker to move in a vertical plane under the driving of the connecting rod; Synchronous movement in the vertical plane in the horizontal direction and the longitudinal direction realizes the synchronous operation of expanding the sleeve outward and vertically downwards, which is different from the prior art in that the hinge is firstly spread along the hinge before being lowered, and then vertically The overall length of the adjusting sleeve and the movable strut is longitudinally extended, the operation is convenient, and the loading and unloading speed is fast; especially in the case of a large lifting height, the operating speed and the swinging speed of the rotating connecting rod and the lowering sleeve are far It is far superior to the traditional way of slowly adjusting the overall length of the sleeve and the movable struts by the linear transmission mechanism, which is advantageous for rapid and emergency deployment. Especially when lifting, there is no need to bottom out, and then landing, the resistance is small, and the effort is more labor-saving.

Preferably, the connecting rod comprises a first connecting rod and a second connecting rod, and the first connecting rod and the driving sprocket are hinged to the cabin body.

Preferably, a brace is disposed between the cabin and the sleeve, and the fixed end of the strut is hinged with the sleeve, and the movable end of the strut is detachably connected to the connecting rod. The parallelogram mechanism is fixed by the struts, so that the cabin can maintain a stable posture after being raised, and self-locking is achieved. Preferably, the movable end of the strut is wedge-shaped, and the side of the connecting rod is provided with a bayonet for receiving the movable end of the strut. When the movable end of the strut is placed inside the bayonet, the strut and the connecting rod are perpendicular to each other. . With such a structure, compared with the existing planar quadrilateral mechanism, compared with the manner in which the pin is locked to form a dead rod, the card-type cooperation between the bayonet and the movable end of the strut is convenient for disassembly and assembly, and the operation is safer. It is not easy to wring the operator during the loading process.

Preferably, the bayonet is provided with a protruding locking tongue, and the movable end of the strut is provided with a stop for receiving the locking tongue; the movable end of the strut is movable relative to the connecting rod inside the bayonet, Engaging or disengaging the locking tongue; a limiting mechanism for restricting the movable end of the strut and the relative movement inside the bayonet is disposed between the strut and the connecting rod. With such a structure, it is further ensured that the planar quadrilateral mechanism will not collapse easily after being locked, thereby ensuring structural stability and equipment safety.

Preferably, the power source is a driving motor, and a speed reducer is disposed between the output end of the driving motor and the driving sprocket. With such a structure, by the driving motor provided with the anti-reverse function and the chain, the suspension and braking can be realized during the lifting process, and the intermittent lifting can be realized.

Preferably, the power source includes a driving gear that rotates synchronously with the driving sprocket, the driving gear meshes with a power output end of the speed reducer, and the lock body is fixedly disposed on the cabin, and the lock of the lock can Engaged into the inter-tooth gap of the drive gear or removed from the inter-tooth gap of the drive gear. With such a structure, the malfunction of the sleeve is prevented from moving relative to the cabin, and the stability and safety of the mechanism are further improved. Compared with the prior art, the beneficial effects of the present invention are as follows:

1. The lifting operation time is shorter, and the lifting efficiency is high: First, through the sprocket chain transmission, the transmission speed is faster than that of the rack and pinion and the screw nut. Secondly, different from the prior art, only the linear telescopic mechanism completes the lifting and lowering of the entire height portion along the vertical telescopic support rod. In the present invention, the frame in the parallelogram mechanism (ie, the cabin in the present invention) is Rocker (ie sleeve in the present invention) In the downward development process, the relative movement in the vertical direction is performed to complete the elevation of a part of the height (approximately one-third of the height), in which the height is particularly fast, the operation time is short, and the lifting efficiency is high.

2. It is more labor-saving when lifting: First, adjust the transmission ratio through the gear shifting in the reducer, which is more labor-saving during operation. Second, because the parallelogram mechanism performs a part of the lift, this part of the operation does not need to be continuously operated by the operator. The operator can expand and the operation is more labor-saving.

3, the mechanism is reliable, the operation is safe: First, because the chain sprocket mechanism is adopted, compared with the existing screw nut pair and the rack and pinion mechanism, it is less likely to be stuck, especially suitable for wind and sand, etc. It is used in harsh environments and has better reliability. Secondly, by locking the wedge-shaped strut and the bayonet of the connecting rod and locking the self-locking by the locking device, the existing locking pin is replaced, the locking operation is not easy to accidentally injure the operator, and the safety performance is better. Thirdly, by the combination of the drive motor with the anti-reverse function and the chain, the suspension and braking can be realized during the lifting process, and the intermittent lifting can be realized. Fourthly, the lock can be inserted into the inter-tooth gap of the drive gear, and the self-locking of the mechanism is further realized in a manner similar to the child lock, thereby preventing the mechanism from collapsing during misoperation, and the safety performance is better. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of an embodiment of the present invention; FIG. 2 is a schematic structural view of a fourth embodiment of the present invention; FIG. FIG. 5 is a partially enlarged schematic view of FIG. 4; FIG. 6 is a schematic structural view of an embodiment of a power source according to the present invention; FIG. 7 is a schematic structural view of the power source after the lock is added in the present invention. 8 is a schematic structural view of the parallelogram mechanism in the stowed state according to the present invention; FIG. 9 is a structural schematic view of the parallelogram mechanism of FIG. 8 after being deployed to a preset posture; FIG. 10 is a chain-driven movable strut lifting and lowering in the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 11 is a schematic view showing the height of the ground separation before the deployment by the parallelogram mechanism in the present invention; Fig. 12 is a schematic view showing the change of the height from the ground after the expansion of the parallelogram mechanism in the present invention.

Marked in the figure: sleeve one 1; movable strut one 2; first sprocket one 3a _; second sprocket one 3b _; chain -4; drive sprocket one 5; chain inlet one 6; cabin one 7; Rod one 8; first link one 8a _; second link one 8b; strut one 9; bayonet one 10; lock tongue one 11; stop one 12; limit mechanism one 13; reducer one 15; One 16. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be further described in detail in conjunction with the test examples and specific embodiments. However, the scope of the above-mentioned subject matter of the present invention should not be construed as being limited to the following embodiments, and the technology implemented based on the present invention is within the scope of the present invention.

Example 1

As shown in FIG. 1 , the cabin lifting mechanism of the embodiment comprises a sleeve 1 and a movable strut 2 sleeved inside the sleeve 1 , wherein the sleeve 1 serves as a reference component for synchronous lifting of the cabin in the lifting mechanism. The movable strut 2 is used for contacting the ground, and supporting the entire cabin lifting mechanism, the movable strut 2 and the inner wall of the sleeve 1 are matched with each other, and a driving is arranged between the movable strut 2 and the sleeve 1. The device is used for driving the movable strut 2 to move relative to the sleeve 1, and more specifically, the driving device is used for driving the movable strut 2 into the sleeve 1 or protruding from the bottom of the sleeve 1, thereby realizing The overall height of the lifting mechanism changes, The barrel 1 is provided with a first sprocket 3a and a second sprocket 3b, wherein the first sprocket 3a is located above the second sprocket 3b, and the first sprocket 3a and the second sprocket 3b function as a sleeve 4 The axial movement of the cylinder 1 is guided, and a chain 4 is coupled between the first sprocket 3a and the second sprocket 3b. The chain 4 is disposed inside the sleeve 1, and the chain 4 drives the movable strut 2 in the sleeve. The internal lifting of the movable strut 2, that is, the movable strut 2 and the chain 4 are synchronously raised and lowered inside the sleeve 1. In the present embodiment, the chain 4 is fixedly coupled to the movable strut 2, and when the driving device drives the chain 4 to move up and down inside the sleeve 1, the movable strut 2 is then raised and lowered.

In other embodiments, in order to realize the synchronous lifting of the movable strut 2 by the chain 4, the chain 4 and the movable strut 2 can also be connected by means of a card, that is, the movable strut 2 is provided with a latching tooth matched with the chain 4. Column, through the card type 4 and the card-tooth engagement, the chain 4 and the movable strut 2 are synchronously lifted, and the rest can realize the synchronous lifting and lowering between the chain 4 and the movable strut 2, such as the chain 4 is tied to The movable strut 2, or the movable strut 2 is hung on the chain 4, etc., and will not be described again here. By raising or lowering the side cabin by the cabin lifting mechanism of the embodiment, compared with the existing lifting device of the rack and pinion mechanism and the screw nut auxiliary mechanism, the utility model has the advantages of low cost, convenient manufacture and installation, and at the same time, the transmission thereof The speed ratio is large, the lifting speed is fast, and the efficiency is high, especially when it is used in harsh environments such as sand and sand, it is not easy to be stuck, safe and reliable.

Example 2

As shown in FIG. 1 , the cabin lifting mechanism of the present embodiment is further improved as in the first embodiment. The driving device is a driving sprocket 5 provided with a power source, and the chain 4 is closed to form a chain ring, and the chain ring and the first sprocket 3a, the second sprocket 3b, and the drive sprocket 5 are cooperatively connected and tensioned, that is, the chain ring is circumferentially and tensioned between the first sprocket 3a and the second sprocket 3b, and is driven by the sprocket 5 The forward rotation and the reverse rotation realize the ascending or descending of the part of the chain 4 located inside the sleeve 1 for driving the movable strut 2 to lift and lower, thereby driving the movable strut 2 to ascend and descend. In this way, the tensioned chain 4 drives the torque to be large, and is easier to lift and lower, and when the chain 4 is closed and rotated, the operation stroke is not limited by the length of the chain 4, and the stroke The range is large, especially suitable for the lifting operation of the cabin with large self-weight and large lift.

Please refer to Example 1 for the rest of the structure.

Example 3

As shown in FIG. 1, the cabin lifting mechanism of the present embodiment is further improved as in the second embodiment. The first sprocket 3a is disposed on the top of the sleeve 1, and the second sprocket 3b is disposed on the first sprocket 3a. On the outer side wall of the sleeve 1 on the lower side, a chain inlet 6 through which the chain 4 is inserted is disposed on the side wall of the sleeve 1, and the chain 4 is passed through the chain inlet 6 after bypassing the second sprocket 3b. To the inside of the sleeve 1, and after bypassing the first sprocket 3a, it is wound from the opening provided at the top end of the sleeve 1 to the outside of the sleeve 1, and is tensioned with the drive sprocket 5 to form a chain ring. In the manner of facilitating the lifting of the movable strut 2, the structural arrangement is facilitated, and the chain 4 is respectively disposed inside the sleeve 1, and the outer sides are also less entangled and interfere with each other.

Please refer to Example 2 for the rest of the structure.

Example 4

As shown in the figure, the square cabin lifting mechanism of the present embodiment is further improved as in the second embodiment. The driving sprocket 5 is disposed on the cabin 7, and two connecting rods 8 are disposed between the cabin 7 and the sleeve 1. In this embodiment, the connecting rod 8 includes a first connecting rod 8a and a second connecting rod 8b, and both ends of the first connecting rod 8a and the second connecting rod 8b are respectively hinged with the cabin 7 and the sleeve 1 The first link 8a and the drive sprocket 5 are coaxially hinged to the cabin 7, and the pod 7, the sleeve 1 and the connecting rod 8 form a parallelogram mechanism that moves in a vertical plane. The two connecting rods 8 are located in the same vertical direction as the hinge portion of the cabin 7, the two connecting rods 8 are in the same vertical direction as the hinge portion of the sleeve 1, and the two connecting rods 8 are hinged to the cabin 7 The spacing of the parts and the distance between the two connecting rods 8 and the hinge portion of the sleeve 1 are equal, forming a parallelogram with the cabin 7 as a frame, the sleeve 1 as a rocker, and the two connecting rods 8 as a connecting rod. Mechanism, the parallelogram mechanism moves in a vertical plane. When the connecting rod 8 rotates around its hinge portion with the cabin 7, the sleeve 1 simultaneously moves in the horizontal and vertical directions, and the sleeve 1 is simultaneously expanded downward while being lowered, and in the existing structure: horizontally Compared with the way that the hinge hinge is folded and the vertical direction is extended by the length adjustment of the sleeve 1 and the movable strut 2, the horizontal and vertical directions can be synchronously extended by driving the parallelogram mechanism. The efficiency of the exhibition is greatly improved, and the rapid deployment of the cabin 7 is facilitated.

The operation process of the cabin lifting mechanism in the present embodiment from the folded state to the unfolding is as shown in FIG. 8 to FIG. 10. Referring first to FIG. 8, when the cabin lifting mechanism is stowed, the bottom of the movable strut 2 and the cabin 7 are The relative height difference between them is L1;

When the parallelogram mechanism is unfolded, the height of the bottom of the movable strut 2 decreases as the height of the sleeve 1 decreases. This process requires only ls~2s, and the height difference between the bottom height of the movable strut 2 and the lower limit is L2; This part of the action takes very short time and has a large drop, which greatly improves the lifting efficiency of the cabin. The unfolded structure is shown in Figure 9;

After the parallelogram mechanism is deployed to the preset posture and stabilized, the chain sprocket 5 drives the chain 4 to move up and down. At this time, the movable struts 2 are relatively lifted and lowered inside the sleeve 1. The structure before and after the lifting and lowering of this step is as shown in FIG. In this step, the height difference between the movable strut 2 and the cabin 7 is L3.

As an equivalent embodiment of the present embodiment, the number of the links 8 may be three or more, and as a follower lever, the stability of the structure is increased, and details are not described herein.

The improved structure with high efficiency and high speed of the present embodiment will be further described below with reference to FIG. 11 and FIG. 12. Referring to FIG. 11, the height of the bottom of the movable strut 2 located in the sleeve 1 from the ground before the parallelogram mechanism is deployed, That is, the required stroke length is L4 when unloading, and the linear drive mechanism is required to adjust the bottom position of the movable strut 2 compared to the stroke of the entire L4 length in the prior art, in this embodiment, by expanding parallel In the quadrilateral mechanism, during the unfolding process, the bottom of the movable strut 2 has been simultaneously lifted and lowered by the sleeve 1 with a length of L2, and the travel of the part of the stroke takes only about 1 second, and the efficiency is extremely high, and the rest depends on The linear drive mechanism adjusts the stroke L5=L4-L2. This part relies on the linear drive mechanism to achieve a relatively slow lifting speed, but due to the reduced stroke of this part, it also takes time. Lower.

Please refer to Example 2 for the rest of the structure.

Example 5

As shown in FIG. 2, the square cabin lifting mechanism of the present embodiment is further improved as in the second embodiment. A strut 9 is disposed between the cabin 7 and the sleeve 1, and the fixed end and the sleeve of the strut 9 are provided. 1 hinged, the movable end of the strut 9 is detachably connected to the connecting rod 8. When the cabin lifting mechanism is deployed to the preset posture, the movable end of the strut 9 is consolidated with the connecting rod 8, and the strut 9 functions to restrict the relative movement between the sleeve 1 and the cabin 7. The detachable connection between the movable end of the middle strut 9 and the connecting rod 8 adopts a common pinning manner, that is, by providing a pin hole and a corresponding pin, the connection of the strut 9 and the connecting rod 8 is realized. break down. It should be noted that the strut 9 in this embodiment may be implemented by using a diagonal strut or a diagonal pull, and will not be described herein.

Please refer to Example 2 for the rest of the structure.

Example 6

As shown in FIG. 3 and FIG. 4, the square cabin lifting mechanism of the present embodiment is a preferred embodiment of the movable end of the strut 9 in the second embodiment, which is detachably connected to the connecting rod 8. The movable end of the strut 9 In the shape of a wedge, the side of the connecting rod 8 is provided with a bayonet 10 for receiving the movable end of the strut 9, and when the movable end of the strut 9 is placed inside the bayonet 10, the strut 9 and the connecting rod 8 are perpendicular to each other. When the parallelogram mechanism needs to be locked, the strut 9 is snap-fitted with the snap-in wall in the bayonet 10, thereby limiting the freedom of movement of the movable end of the strut 9 inside the bayonet 10, and making the entire parallelogram mechanism Locking. In this embodiment, the movable end of the strut 9 is arranged in a wedge shape to facilitate the feeding of the strut 9 into the interior of the bayonet 10, and the wedge-shaped strut 9 is used, before the parallelogram mechanism is operated to the preset snapping posture. It can be inserted into the bayonet 10 through the wedge end, and the size limit is small. In other embodiments, the end of the strut 9 can also adopt a round head or a flat cross section, and will not be described herein. With the structure of the embodiment, compared with the manner in which the pin is pinned to form a dead rod as in the fifth embodiment, only the strut 9 can be overlapped on the connecting rod 8 during the disassembly and assembly process, and the insertion is not required after the stable posture. The pin is not only easy to operate, but also difficult to trip the operator and has better safety performance.

Please refer to Example 2 for the rest of the structure.

Example 7

As shown in FIG. 3 and FIG. 4, in the embodiment, the cabin lifting mechanism is a preferred embodiment of the movable end of the strut 9 in the embodiment 6 and the connecting rod 8 is detachably connected to the connecting rod 8, and is disposed in the bayonet 10 a protruding tongue 11 is provided, the movable end of the strut 9 being provided with a stop 12 for receiving the bolt 11; the movable end of the strut 9 is movable relative to the connecting rod 8 inside the bayonet 10, ie The bayonet 10 is internally provided with a gap for the movable end of the strut 9 to move, and at the same time, the gap can cause the bolt 11 to snap into or out of the port 12. A limiting mechanism 13 for restricting the movable end of the strut 9 and the relative movement inside the bayonet 10 is disposed between the strut 9 and the connecting rod 8, and the limiting mechanism 13 can adjust the bayonet 10 and the strut 9 as needed. The gap between the movable ends is such that the movable end of the strut 9 can or cannot be displaced within the bayonet 10 to achieve locking or unlocking.

The specific working mode of the strut 9 in this embodiment is as follows: First, after the parallelogram mechanism moves to the preset posture, the wedge-shaped head of the movable end of the strut 9 is placed inside the bayonet 10, at this time, There is a gap between the movable end of the rod 9 and the bayonet 10, which can be relatively moved inside the bayonet 10; after that, the end 12 of the movable end of the strut 9 is snapped into the inside of the bolt 11, and through this step, the support can be avoided. The movable end of the rod 9 is taken out of the bayonet 10; finally, the degree of freedom of the movable end of the strut 9 to translate inside the bayonet 10 is restricted by the limiting mechanism 13 to achieve locking.

It should be noted that the strut 9 in this embodiment is different from the dead bar of the remaining parallelogram mechanism. After the parallelogram mechanism is unfolded and locked, the strut 9 as a dead bar is subjected to tensile force instead of pressing force. .

It should be noted that the limiting mechanism 13 in this embodiment preferably uses a lock with a lock, and the lock is fixed. The fixed end is fixedly connected with the connecting rod 8, and the movable end of the lock can extend into the bayonet 10 and be restricted or unlocked along the relative movement direction of the movable end of the strut 9 in the bayonet 10. In other embodiments, the adjustment of the gap can also be realized by using a linear limit motion mechanism such as a screw nut pair and a hydraulic cylinder, which will not be described herein.

For the rest of the structure, please refer to the embodiment 6

Example 8

As shown in FIG. 5, the square cabin lifting mechanism of the present embodiment is further improved as in the second embodiment. The power source is a driving motor, and a speed reducer 15 is disposed between the output end of the driving motor and the driving sprocket 5. The drive ratio between the drive motor and the drive sprocket 5 is adjusted by the drive motor and the reducer 15, and the drive motor provided with the anti-reverse function cooperates with the chain 4 to suspend and brake during the lifting process, thereby achieving intermittent lifting .

For the rest of the structure, please refer to the embodiment 2

Example 9

As shown in FIG. 6, the square cabin lifting mechanism of the present embodiment is further improved as in the eighth embodiment. The power source includes a driving gear that rotates synchronously with the driving sprocket 5, and the driving gear and the driving sprocket 5 are consolidated in the same The driving gear is meshed with the output gear on the power output end of the reducer 15 , and the lock body 16 is fixedly disposed on the cabin 7 , and the fixed end of the lock 16 is fixedly disposed on the cabin 7 , and the lock of the lock 16 can be It is inserted into the inter-tooth gap of the drive gear or removed from the inter-tooth gap of the drive gear to achieve locking and unlocking. With such a structure, the operation of the sleeve 1 relative to the cabin 7 is prevented from being erroneously operated by a person, and the stability and safety of the mechanism are further improved.

For the rest of the structure, please refer to the embodiment 8

Example 10

The square cabin lifting mechanism of the present embodiment is further improved as in the fourth embodiment. The power source is a hand hoist, the length of the rocker arm is 215, and the hand hoist is used as the input end of the speed reducer 15, and the speed reducer 15 is internally connected. After one-stage gear reduction, the speed ratio is 4.2, and the indexing circle radius of the gear of the reducer 15 is 25, and the output end gear of the reducer 15 and the drive sprocket 5 pass a pair of speeds. The first-stage gear is reduced by a ratio of 2, and the speed ratio between the hand hoist and the drive sprocket as the power input end is 78.4, and a ratchet mechanism is provided in the hand hoist to achieve The reverse function, by means of the hand hoist and the chain 4, can realize the pause and the intermittent lifting of the brake during the lifting process.

At the same time, by shifting the gear of the output gear of the reducer and the one-stage gear coaxially fixed with the drive sprocket 5, the lift of the lift mechanism can be adjusted by adjusting the size of the drive sprocket. In this embodiment, the distance between the chain 4 of the lifting mechanism and the movable strut 2 is 17. 2匪, which is substantially higher than the rest of the rack and pinion. , screw nut pair and other forms, and the structure is streamlined.

Please refer to Example 4 for the rest of the structure.

Claims

claims

1. A shelter lifting mechanism, including a movable strut (2) arranged inside the sleeve (1), and a driving device for driving the movable strut (2) and the sleeve (1) to move relative to each other. Its characteristics The sleeve (1) is provided with a first sprocket (3a) and a second sprocket (3b), the first sprocket (3a) is located above the second sprocket (3b), and the third sprocket (3a) is located above the second sprocket (3b). A chain (4) is connected between the first sprocket (3a) and the second sprocket (3b). The chain (4) is arranged inside the sleeve (1), and the driving device drives the chain (4) in the sleeve. The barrel (1) rises and falls inside, and the chain (4) drives the movable support rod (2) to rise and fall inside the sleeve (1).

2. The shelter lifting mechanism according to claim 1, characterized in that: the driving device is a driving sprocket (5) provided with a power source, the chain (4) is closed to form a chain ring, and the chain ring Cooperatively connected with the first sprocket (3a), the second sprocket (3b), and the driving sprocket (5) and tensioned and pre-tensioned.

3. The shelter lifting mechanism according to claim 2, characterized in that: the first sprocket (3a) is arranged on the top of the sleeve (1), and the second sprocket (3b) is arranged on the sleeve (1) Outside, the side wall of the sleeve (1) is provided with a chain entrance (6) for the chain (4) to pass through. The chain (4) bypasses the second sprocket (3b) and is passed by the chain. The entrance (6) penetrates into the inside of the sleeve (1) and bypasses the first sprocket

(3a) and then wind it out from the opening provided at the top of the sleeve (1) to the outside of the sleeve (1).

4. The shelter lifting mechanism according to claim 2, characterized in that: the driving sprocket (5) is arranged on the cabin (7), between the cabin (7) and the sleeve (1) At least two connecting rods (8) are provided, and both ends of each connecting rod (8) are hinged with the cabin (7) and the sleeve (1) respectively. The cabin (7) and the sleeve (1) and the connecting rod (8) form a parallelogram mechanism that moves in the vertical plane.

5. The shelter lifting mechanism according to claim 4, characterized in that: the connecting rod (8) includes a first connecting rod (8a) and a second connecting rod (8b), and the first connecting rod (8a) ) and the drive sprocket (5) are coaxially hinged to the cabin (7).

6. The shelter lifting mechanism according to claim 4, characterized in that: a stay (9) is provided between the cabin (7) and the sleeve (1), and the fixation of the stay (9) The end of the support rod (9) is hingedly connected to the sleeve (1), and the movable end of the support rod (9) is detachably connected to the connecting rod (8).

7. The shelter lifting mechanism according to claim 6, characterized in that: the movable end of the strut (9) is wedge-shaped, and the side of the connecting rod (8) is provided with a clamp for accommodating the movable end of the strut (9). When the movable end of the support rod (9) is placed inside the bayonet (10), the support rod (9) and the connecting rod (8) are perpendicular to each other.

8. The shelter lifting mechanism according to claim 7, characterized in that: a protruding lock tongue (11) is provided in the bayonet (10), and the movable end of the support rod (9) is provided with a The stop (12) of the lock tongue (11); the movable end of the support rod (9) can move relative to the connecting rod (8) inside the bayonet (10), so that the lock tongue (11) can snap in or out Stop (12); a limiting mechanism (13) for limiting the relative movement between the movable end of the stay (9) and the inside of the bayonet (10) is provided between the support rod (9) and the connecting rod (8). .

9. The shelter lifting mechanism according to claim 2, characterized in that: the power source is a drive motor, and a reducer (15) is provided between the output end of the drive motor and the drive sprocket (5).

10. The shelter lifting mechanism according to claim 9, characterized in that: the power source includes a driving gear that rotates synchronously with the driving sprocket (5), and the driving gear meshes with the power output end of the reducer. , The cabin (7) is fixedly provided with a lock (16), and the lock head of the lock (16) can be inserted into or removed from the gap between the teeth of the driving gear.