Carriage expansion device

Abstract

The compartment expansion device comprises a compartment body and an expansion mechanism, the expansion mechanism comprises a telescopic rod, a cross beam and two electric push rods, the number of the electric push rods is two, the two electric push rods are arranged on the cross beam in a bilateral symmetry mode, and the telescopic rod is arranged on the cross beam. The electric push rod is arranged on the carriage body, the end, away from the cross beam, of the electric push rod is installed on the carriage body, the multiple telescopic rods are arranged on the cross beam side by side, and the end, away from the cross beam, of each telescopic rod is installed on the carriage body; the electric push rod is driven by the control system to extend outwards, the cross beam is stretched outwards in cooperation with the telescopic rod, the cross beam and the telescopic rod form an expansion bracket, compartment body expansion is achieved, the structure is simple, maintenance is convenient, noise is low, cleaning and maintenance are not needed, the material and labor cost is reduced, and the application scene is wide.

Description

Technical Field

[0001] The utility model relates to the field of compartment expansion equipment, in particular to a compartment expansion device. Background Art

[0002] In existing expansion cabins and expansion vans, the most common expansion mechanism currently uses a drive motor to drive a rack and pinion transmission pair to push the expansion body out of the box. This method has a complex structure, is noisy during the expansion process, has a large gap between the rack and pinion pairs, and the grease on the rack and pinion pairs easily sticks to sand and dust. If not cleaned in time, it will cause the expansion to jam and is difficult to repair. Utility Model Content

[0003] (1) Technical issues to be solved

[0004] In order to solve the above problems in the prior art, the utility model provides a compartment expansion device.

[0005] (2) Technical solution

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:

[0007] A car body expansion device comprises a car body and an expansion mechanism, wherein the expansion mechanism comprises a telescopic rod, a crossbeam and an electric push rod;

[0008] There are two electric push rods, which are symmetrically arranged on the crossbeam, and one end of the electric push rod away from the crossbeam is installed on the box body;

[0009] A plurality of telescopic rods are provided, and the plurality of telescopic rods are arranged side by side on the cross beam, and one end of the telescopic rod away from the cross beam is installed on the box body.

[0010] Preferably, the expansion mechanism is provided in two groups, which are relatively arranged on the front and rear sides of the box body, and the telescopic rods and electric push rods of the two groups of the expansion mechanisms are staggered with each other.

[0011] Preferably, it further comprises a control mechanism, wherein the control mechanism comprises a first travel switch and a single chip microcomputer;

[0012] The first travel switch is installed on a side wall of the crossbeam close to the compartment body;

[0013] The first travel switch and the electric push rod are both electrically connected to the single chip microcomputer.

[0014] Preferably, the control mechanism also includes a second travel switch, which is installed in the telescopic rod. The telescopic rod includes an outer tube body and an inner tube body. The inner tube body is sleeved in the outer tube body. The second travel switch is installed on the outer wall of the outer tube body near the opening. A protrusion block is provided at the tail end of the inner tube body. The second travel switch is electrically connected to the single-chip microcomputer.

[0015] Preferably, the expansion mechanism further comprises a crank, a drive shaft, a bearing seat, a driving gear, a driven gear and a belt;

[0016] The drive shaft is installed in the bearing seat, one end of the drive shaft is connected to the crank, and the other end of the drive shaft is connected to the driving gear. The driving gear is connected to the driven gear through a belt, and the output shaft of the motor of the electric push rod extends outward and is connected to the driven gear.

[0017] (3) Beneficial effects

[0018] The beneficial effects of the present invention are:

[0019] 1. The control system drives the electric push rod to extend outward, and cooperates with the telescopic rod to stretch the beam outward. The beam and the telescopic rod form an expansion bracket to achieve the expansion of the compartment. This application has a simple structure, easy maintenance, low noise, no need for cleaning and maintenance, and reduces material and labor costs. It has a wide range of application scenarios;

[0020] 2. When the electric linear actuator is in a power-off state, manually crank the handle to drive the drive shaft to rotate, and then drive the motor of the electric linear actuator to rotate through the cooperation of the driving gear, driven gear and belt, thereby realizing manual drive control of the electric linear actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a car body expansion device;

[0022] Figure 2 This is a schematic diagram of the structure of the electric push rod connected to the crank;

[0023] Figure 3 Schematic diagram of the structure of the telescopic rod.

[0024] Description of reference numerals:

[0025] 1. Car body body;

[0026] 2. Beam;

[0027] 3. Telescopic rod;

[0028] 31. Outer tube; 32. Inner tube; 33. Protruding block;

[0029] 4. First travel switch;

[0030] 5. Electric linear actuator;

[0031] 6. Crank handle;

[0032] 7. Drive shaft;

[0033] 8. Driving gear;

[0034] 9. Driven gear;

[0035] 10. Belt;

[0036] 11. Second travel switch. DETAILED DESCRIPTION

[0037] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0038] Please refer to Figures 1 to 3 The utility model provides a box expansion device, comprising a box body 1 and an expansion mechanism, wherein the expansion mechanism comprises a telescopic rod 3, a crossbeam 2 and an electric push rod 5;

[0039] There are two electric push rods 5, which are symmetrically arranged on the crossbeam 2, and one end of the electric push rod 5 away from the crossbeam 2 is installed on the box body 1;

[0040] The telescopic rods 3 are provided in plurality, and the plurality of telescopic rods 3 are arranged side by side on the crossbeam 2, and one end of the telescopic rod 3 away from the crossbeam 2 is mounted on the box body 1;

[0041] When in use, the control system drives the electric push rod 5 to extend outward, and cooperates with the telescopic rod 3 to stretch the beam 2 outward. The beam 2 and the telescopic rod 3 form an expansion bracket to achieve the expansion of the compartment. This application has a simple structure, easy maintenance, low noise, no need for cleaning and maintenance, reduces material and labor costs, and has a wide range of application scenarios.

[0042] In this embodiment, there are two groups of expansion mechanisms, which are relatively arranged on the front and rear sides of the box body 1, and the telescopic rods 3 and electric push rods 5 of the two groups of expansion mechanisms are staggered with each other. The two groups of expansion mechanisms can realize the expansion of the front and rear sides of the box body 1.

[0043] In this embodiment, a control mechanism is further included, and the control mechanism includes a first travel switch 4 and a single chip microcomputer;

[0044] The first travel switch 4 is installed on a side wall of the crossbeam 2 close to the compartment body 1;

[0045] The first travel switch 4 and the electric push rod 5 are both electrically connected to the single chip microcomputer;

[0046] When in use, the telescopic position of the electric push rod 5 is determined by the first travel switch 4, so as to facilitate the closing control of the electric push rod 5 in cooperation with the single chip microcomputer.

[0047] In this embodiment, the control mechanism further includes a second travel switch 11, which is installed in the telescopic rod 3. The telescopic rod 3 includes an outer tube 31 and an inner tube 32. The inner tube 32 is sleeved in the outer tube 31. The second travel switch 11 is installed on the outer wall of the outer tube 31 near the opening. A protrusion 33 is provided at the tail end of the inner tube 32. The second travel switch 11 is electrically connected to the single-chip microcomputer.

[0048] During use, when the inner tube body 32 extends outward until the protruding block 33 on the inner tube body 32 contacts the second travel switch 11, the single chip microcomputer determines that the electric push rod 5 has extended outward to the right position, and then realizes the closing control of the electric push rod 5.

[0049] In this embodiment, the expansion mechanism further includes a crank 6, a drive shaft 7, a bearing seat, a driving gear 8, a driven gear 9 and a belt 10;

[0050] The drive shaft 7 is installed in the bearing seat, one end of the drive shaft 7 is connected to the crank 6, and the other end of the drive shaft 7 is connected to the driving gear 8. The driving gear 8 is connected to the driven gear 9 through a belt 10. The output shaft of the motor of the electric push rod 5 extends outward and is connected to the driven gear 9;

[0051] During use, when the electric push rod 5 is in a power-off state, the crank handle 6 is manually cranked to drive the drive shaft 7 to rotate, and then the driving gear 8, the driven gear 9 and the belt 10 cooperate to drive the motor of the electric push rod 5 to rotate, thereby realizing manual drive control of the electric push rod 5.

[0052] The working principle of this utility model is as follows:

[0053] The control system drives the electric push rod 5 to extend outward, and cooperates with the telescopic rod 3 to stretch the beam 2 outward. The beam 2 and the telescopic rod 3 form an expansion bracket to achieve the expansion of the compartment. The application has a simple structure, easy maintenance, low noise, no need for cleaning and maintenance, and reduces material and labor costs. It has a wide range of application scenarios.

[0054] The circuits, electronic components and modules involved are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0055] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

[0056] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A vehicle body expansion device, characterized in that: It includes a box body and an expansion mechanism, wherein the expansion mechanism includes a telescopic rod, a crossbeam and an electric push rod; There are two electric push rods, which are symmetrically arranged on the crossbeam, and one end of the electric push rod away from the crossbeam is installed on the box body; A plurality of telescopic rods are provided, and the plurality of telescopic rods are arranged side by side on the cross beam, and one end of the telescopic rod away from the cross beam is installed on the box body.

2. A vehicle body expansion device according to claim 1, characterized in that: The expansion mechanism is provided in two groups, which are relatively arranged on the front and rear sides of the compartment body, and the telescopic rods and electric push rods of the two groups of the expansion mechanism are staggered with each other.

3. A car body expansion device according to claim 1, characterized in that: It also includes a control mechanism, which includes a first travel switch and a single-chip microcomputer; The first travel switch is installed on a side wall of the crossbeam close to the compartment body; The first travel switch and the electric push rod are both electrically connected to the single chip microcomputer.

4. A car body expansion device according to claim 3, characterized in that: The control mechanism also includes a second travel switch, which is installed in the telescopic rod. The telescopic rod includes an outer tube body and an inner tube body. The inner tube body is sleeved in the outer tube body. The second travel switch is installed on the outer wall of the outer tube body near the opening. A protrusion block is provided at the tail end of the inner tube body. The second travel switch is electrically connected to the single-chip microcomputer.

5. The vehicle body expansion device according to claim 1, characterized in that: The expansion mechanism also includes a crank, a drive shaft, a bearing seat, a driving gear, a driven gear and a belt; The drive shaft is installed in the bearing seat, one end of the drive shaft is connected to the crank, and the other end of the drive shaft is connected to the driving gear. The driving gear is connected to the driven gear through a belt, and the output shaft of the motor of the electric push rod extends outward and is connected to the driven gear.

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