Shelter folding and unfolding mechanism

Abstract

The utility model belongs to the technical field of shelters, and particularly relates to a shelter folding and unfolding mechanism which comprises two oppositely-arranged motors, speed reducers are arranged at the output ends of the two oppositely-arranged motors, the output ends of the speed reducers are connected with transmission rods, the ends, away from the speed reducers, of the transmission rods are connected with right-angle commutators, and the right-angle commutators are connected with the right-angle commutators. The output end of the right-angle reverser is connected with a driving rod, driving gears are arranged at the two ends of the driving rod, an extension plate is arranged above the driving gears, racks meshed with the driving gears are arranged on the two sides of the lower side face of the extension plate, and linear sliding rails are arranged on the two sides of the extension plate. The motor drives the transmission rod connected with the speed reducer, the transmission rod drives the driving rod to rotate through the right-angle reverser, the driving gears at the two ends of the driving rod drive the meshed racks, then the extension plate is driven to stretch out towards the two sides, and the linear sliding rails arranged on the two sides can guarantee the bearing weight and operation stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of square cabins, in particular to a square cabin folding and unfolding mechanism. Background Art

[0002] The mobile cabin is a square cabin that can be moved by a vehicle. Various functions can be arranged in the cabin according to different usage scenarios, such as medical cabins and experimental cabins. It is very convenient. In order to ensure the convenience of transportation and the size of the space during use, the existing cabins are generally equipped with a folding and unfolding mechanism to drive the cabin to expand and achieve a larger cabin range.

[0003] For example, the extended cabin screw extension device disclosed in the utility model patent with patent announcement number CN203977577U discloses a vehicle-mounted cabin leg assembly, including a driving mechanism and an extension rail, wherein the driving mechanism is placed in the middle of the extended cabin body and installed on the subframe, and two sets of extension rails are distributed on both sides of the driving mechanism. The extension rail carries the extended cabin body, and the driving mechanism connects the extended cabin body to drive the extended cabin body to expand and contract. However, the length of the extended and contracted cabin depends on the length of the screw rod. At the same time, an excessively long screw rod length may cause the screw rod to deform and twist during transmission, making the screw rod less durable. Therefore, a cabin retracting and extending mechanism that runs smoothly and is not limited by the screw rod length is needed. Utility Model Content

[0004] In view of the above problems, the utility model proposes a shelter folding and unfolding mechanism, which effectively solves the problem in the prior art that the telescopic length is limited by the length of the lead screw and the durability of the lead screw that is too long is poor.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a cabin folding and unfolding mechanism comprises two opposing motors, the output ends of the two opposing motors are each provided with a reducer, the output ends of the reducers are each connected to a transmission rod, the end of the transmission rod away from the reducer is each connected to a right-angle commutator, the output end of the right-angle commutator is connected to a driving rod, both ends of the driving rod are provided with a driving gear, an extension plate is provided above the driving gear, racks meshing with the driving gear are provided on both sides of the lower side surface of the extension plate, linear slide rails are provided on both sides of the extension plate, the transmission rod connected to the reducer is driven by the motor, and the transmission rod drives the driving rod to rotate through the right-angle commutator, so that the driving gears at both ends of the driving rod drive the meshing racks, thereby driving the extension plate to extend to both sides, and the linear slide rails provided on both sides can ensure the supporting weight and stable operation.

[0006] Furthermore, the reducer is provided with a hand crank handle, through which the extension plate can be manually opened and closed when the motor is not working.

[0007] Furthermore, supporting blocks are provided at both ends of the driving rod, and the supporting blocks include a transverse plate and two supporting plates arranged opposite to each other on the transverse plate. The driving gear is arranged between the two supporting plates. Both ends of the driving rod pass through the supporting plates and the driving gears and form a rotational connection with the supporting plates. The driving rod is key-connected to the driving gear. The supporting blocks are provided to increase the running stability of the driving gear and prevent the driving gear from being offset.

[0008] Furthermore, a shaft sleeve is installed at the rotation connection between the driving rod and the support plate. The shaft sleeve increases the wear resistance of the rotation connection between the driving rod and the support plate, and is convenient for replacing the worn parts.

[0009] Furthermore, the slide rail includes a slider fixed on the lower side of the extension plate, and a slide rail with a slide groove is arranged at the lower part of the slider, and the slider is slidably connected to the slide rail to increase the stability of operation.

[0010] Furthermore, the slider is I-shaped, a plurality of bearings are fixed to the inner wall of the slide rail, two sides of the slider are clamped on the bearings, and the slider is supported by the provided bearings to change sliding into rolling to improve smoothness.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model drives the extension plate to extend by driving the gear rack to cooperate with the transmission, so that the accuracy and consistency of the extension plate are increased, and it is not easy to tilt. The utility model is not affected by the length of the transmission rod, and the extension length of the extension plate can be controlled by simply increasing the length of the rack;

[0013] The utility model can manually open and close the extension plate through the hand crank handle, and the linear slide rail provided at the same time ensures the supporting weight while increasing the smoothness and stability of the operation of the transmission rod and the driving rod, so that manual opening and closing is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 Schematic diagram of the cross-section structure of the rack and slide rail.

[0016] In the figure: 1. motor; 2. reducer; 3. transmission rod; 4. right-angle commutator; 5. drive rod; 6. drive gear; 7. extension plate; 8. rack; 9. linear slide; 91. slider; 92. slide rail; 10. hand crank; 11. support block; 111. cross plate; 112. support plate; 12. bushing; 13. bearing. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1-Figure 2 As shown, a cabin folding and unfolding mechanism includes two motors 1 with output ends facing each other, and the output ends of the two opposite motors 1 are both provided with reducers 2, and the reducer 2 is a right-angle reducer 2. The output ends of the reducer 2 are connected to a transmission rod 3 through a diaphragm-type coupling, and the end of the transmission rod 3 away from the reducer 2 is connected to a right-angle commutator 4, and the output end of the right-angle commutator 4 is connected to a driving rod 5 through a diaphragm-type coupling, and both ends of the driving rod 5 are provided with square keys, and the two ends of the driving rod 5 are key-connected with a driving gear 6, and an extension plate 7 is provided above the driving gear 6, and racks 8 meshing with the driving gear 6 are welded and fixed on both sides of the lower side surface of the extension plate 7, and linear slide rails 9 are provided on both sides of the extension plate 7.

[0019] Furthermore, the reducer 2 is provided with a crank handle 10 .

[0020] Furthermore, supporting blocks 11 are provided at both ends of the driving rod 5, and the supporting blocks 11 include a transverse plate 111 and two supporting plates 112 relatively welded and fixed on the transverse plate 111, and the driving gear 6 is arranged between the two supporting plates 112, and the two supporting plates 112 are provided with axial holes, and the two ends of the driving rod 5 pass through the supporting plates 112 and the driving gear 6 and form a rotational connection with the support plates 112.

[0021] Furthermore, a shaft sleeve 12 is installed in the shaft hole of the support plate 112 , and the shaft sleeve 12 is fixedly connected to the support plate 112 by screws, and both ends of the driving rod 5 are inserted into the shaft sleeve 12 .

[0022] Furthermore, the slide rail 92 includes a slider 91 welded and fixed to the lower side of the extension plate 7, and a slide rail 92 with a slide groove is arranged at the lower part of the slider 91, and the slider 91 is slidably connected in the slide groove.

[0023] Furthermore, the slider 91 is I-shaped, and a plurality of bearings 13 are fixedly mounted on the inner wall of the slide rail 92 by screws therethrough, and both sides of the slider 91 are clamped on the bearings 13 and fit with the outer rings of the bearings 13 .

[0024] When the utility model is in use, the motor 1 drives the transmission rod 3 connected to the reducer 2 to rotate, the transmission rod 3 changes the rotation direction through the right-angle commutator 4 and drives the driving rod 5 to rotate, so that the driving gears 6 at both ends of the driving rod 5 drive the meshing rack 8, thereby driving the extension plate 7 to extend to both sides, and at the same time, the extension plate 7 can be retracted by reverse driving the motor 1. The hand crank handle 10 provided on the reducer 2 can be manually driven when the motor 1 cannot work, so that the extension plate 7 is opened or closed.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shelter folding and unfolding mechanism, comprising two opposing motors, characterized in that: The output ends of the two opposing motors are each provided with a reducer, the output ends of the reducers are each connected to a transmission rod, the end of the transmission rod away from the reducer is each connected to a right-angle commutator, the output end of the right-angle commutator is connected to a driving rod, both ends of the driving rod are provided with a driving gear, an extension plate is provided above the driving gear, racks meshing with the driving gear are provided on both sides of the lower side of the extension plate, and linear slide rails are provided on both sides of the extension plate.

2. The shelter folding and unfolding mechanism according to claim 1, characterized in that: The reducer is provided with a hand crank handle.

3. The shelter folding and unfolding mechanism according to claim 1, characterized in that: Support blocks are arranged at both ends of the driving rod, and the support blocks include a transverse plate and two supporting plates arranged opposite to each other on the transverse plate. The driving gear is arranged between the two supporting plates. Both ends of the driving rod pass through the supporting plates and the driving gears and form a rotational connection with the supporting plates. The driving rod is key-connected to the driving gear.

4. The shelter folding and unfolding mechanism according to claim 3, characterized in that: A shaft sleeve is installed at the rotation connection between the driving rod and the supporting plate.

5. The shelter folding and unfolding mechanism according to claim 1, characterized in that: The slide rail comprises a sliding block fixed on the lower side of the extension plate, and a slide rail with a sliding groove is arranged at the lower part of the sliding block.

6. The shelter folding and unfolding mechanism according to claim 5, characterized in that: The sliding block is I-shaped, a plurality of bearings are fixed to the inner wall of the slide rail, and two sides of the sliding block are clamped on the bearings.

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