CN110360242B

CN110360242B - Heat dissipation protection device for electric wheelchair clutch

Info

Publication number: CN110360242B
Application number: CN201910794151.1A
Authority: CN
Inventors: 龙登燕; 纪爱敏; 王豪; 赵仲航
Original assignee: Changzhou Campus of Hohai University
Current assignee: Changzhou Campus of Hohai University
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2021-01-01
Anticipated expiration: 2039-08-27
Also published as: CN110360242A

Abstract

The invention discloses a heat dissipation protection device for an electric wheelchair clutch in the technical field of heat dissipation protection, and aims to solve the technical problem that the electric wheelchair in the prior art has poor ventilation and heat dissipation performance due to narrow internal space and frequent clutch operation. The device comprises a shell for accommodating the clutch, wherein at least one exhaust fan is arranged in the shell and is positioned above the clutch; the side of the shell is provided with a through hole corresponding to the exhaust fan, and the air outlet end of the exhaust fan is aligned to the through hole.

Description

Heat dissipation protection device for electric wheelchair clutch

Technical Field

The invention relates to a heat dissipation protection device for an electric wheelchair clutch, and belongs to the technical field of heat dissipation protection.

Background

The clutch on the electric wheelchair is arranged between the motor and the speed changer and is an assembly directly connected with the power output end of the motor in the transmission system of the electric wheelchair. Normally, the clutch is mounted with the flywheel set of the power output end crankshaft, and is a component for cutting off and transmitting power between the power output end and the power train of the electric wheelchair. During the process of starting the electric wheelchair to normally drive, an operator can operate the clutch according to requirements, so that the power output end is temporarily separated from or gradually connected with the transmission system, and the power output from the motor to the transmission system is cut off or transmitted. When the power output end is gradually connected with the speed changer, the electric wheelchair is ensured to start stably; when the connection between the power output end and the transmission is temporarily cut off, the gear shifting is facilitated and the impact during the gear shifting is reduced; when the electric wheelchair is emergently braked, the connection between the power output end and the speed changer is temporarily cut off through the clutch, and the function of protecting the speed changer can be achieved.

The clutch can generate a large amount of heat due to friction in the operation process, and the ventilation and heat dissipation performance of the clutch of the electric wheelchair running at low speed is poor due to the narrow internal space and frequent operation of the clutch. At present, most electric wheelchair clutches in the market all have the phenomenon of local high temperature in the working process, if heat accumulation can not be dissipated to a certain extent in time, the electric circuit of the electric wheelchair is easily burnt out due to short circuit, and the service life of the wheelchair is shortened.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a heat dissipation protection device for an electric wheelchair clutch, so as to solve the technical problem that the electric wheelchair clutch running at low speed has poor ventilation and heat dissipation performance due to narrow internal space and frequent clutch operation in the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a heat dissipation protection device for a clutch of an electric wheelchair comprises a shell for accommodating the clutch, wherein at least one exhaust fan is arranged in the shell and is positioned above the clutch; the side of the shell is provided with a through hole corresponding to the exhaust fan, and the air outlet end of the exhaust fan is aligned to the through hole.

Preferably, the through holes are not less than one pair, and each pair of through holes are oppositely arranged.

Preferably, a heat conducting plate is further arranged in the shell, the height of the heat conducting plate is located between the clutch and the exhaust fan, and the lower end face of the heat conducting plate is a wavy curved surface.

Preferably, a refrigeration part is further arranged in the shell, the refrigeration part is arranged above the heat conduction plate, and a water absorption material is laid on the upper end face of the heat conduction plate; the water absorbing material comprises water absorbing paper, and the refrigeration component comprises a refrigeration semiconductor.

Preferably, the outer edge of the upper end face of the heat conducting plate is provided with a baffle, and the surface of the clutch is provided with a waterproof layer.

Preferably, the shell up end is connected with the heating panel, the heating panel is equipped with the louvre, the shell is heat conduction material, heat conduction material includes aluminium, iron.

Preferably, a dust screen is arranged between the air outlet end of the exhaust fan and the through hole.

Preferably, the shell is connected with a protective door, and the shell or/and the protective door are made of high-temperature-resistant materials, wherein the high-temperature-resistant materials comprise glass fibers and ceramic fibers.

Preferably, the protection door is hinged to the housing.

Preferably, the side surface of the shell is provided with at least one pair of air holes, and each pair of air holes are oppositely arranged.

Compared with the prior art, the invention has the following beneficial effects: the heat generated by the clutch is quickly conducted upwards by the heat conducting plate, the heat dissipating plate, the exhaust fan and the refrigeration semiconductor are used for dissipating heat outwards and reducing temperature, and the air holes are used for absorbing external cold air, so that the heat generated by the clutch is effectively dissipated in time, and the service life of the wheelchair is prolonged.

Drawings

FIG. 1 is a schematic external view of a heat dissipation protection device for an electric wheelchair clutch according to an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of a heat dissipation protection device for an electric wheelchair clutch according to an embodiment of the present invention;

fig. 3 is a schematic diagram of the structure at B in fig. 2.

In the figure: 1. a housing; 2. a protective door; 3. a heat dissipation plate; 4. a through hole; 5. heat dissipation holes; 6. a clutch; 7. a heat conducting plate; 8. a refrigeration semiconductor; 9. an exhaust fan; 10. air holes are formed; 11. a semicircular groove; 12. a semicircular bulge.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

The invention provides a heat dissipation protection device for a clutch of an electric wheelchair, which is shown in fig. 1 and 2 and respectively shows an external structure and an internal structure of an embodiment of the invention. The device is including acceping shell 1 of clutch 6, and shell 1 articulates there is shutter 2, and shutter 2 can be followed the pivot of articulated department and outwards rotated and open, and 1 up end fixedly connected with heating panel 3 of shell, the 3 upper surfaces of heating panel are equipped with a plurality of evenly distributed's louvre 5. The shell 1 and the protective door 2 play a role in protecting the clutch 6, and in order to prevent the shell 1 and the protective door 2 from being damaged under the high-temperature condition generated by the clutch 6, the shell 1 and the protective door 2 are generally made of high-temperature resistant materials such as glass fibers and ceramic fibers; in order to rapidly conduct the heat generated by the clutch 6 to the heat sink 3, the housing 1 is made of a heat conductive material such as aluminum or iron. In the embodiment, the shell 1 is made of aluminum, so that the shell has good heat-conducting property and light weight; the protective door 2 is made of glass fiber materials.

Two heat-conducting plates 7 are fixedly connected in the shell 1, the heat-conducting plates 7 are L-shaped heat-conducting plates, and the two heat-conducting plates 7 are arranged above the clutch 6 and are arranged in bilateral symmetry. The lower end surface of the heat conducting plate 7 is a wave-shaped curved surface, so that the contact area of the heat conducting plate and the air around the clutch 6 is increased, and the heat generated by the clutch 6 is absorbed and transferred more fully. The specific shape of the lower end surface of the heat conducting plate 7 is, as shown in fig. 3, that the lower end surface of the heat conducting plate 7 is provided with a plurality of semi-circular grooves 11 which are uniformly distributed, and a semi-circular bulge 12 is arranged between two adjacent semi-circular grooves 11, thereby forming a wave-shaped curved surface. The left side and the right side of the shell 1 are provided with two through holes 4 which are distributed oppositely, the inner side of the shell 1 is fixedly connected with two exhaust fans 9, the air outlet end of each exhaust fan 9 is opposite to the corresponding through hole 4, and one exhaust fan 9 corresponds to one through hole 4. The through hole 4 and the exhaust fan 9 are both positioned above the heat conducting plate 7, the heat conducting plate 7 conducts the heat generated by the clutch 6 to a cavity formed by the upper end surface of the heat conducting plate 7 and the shell 1, and the exhaust fan 9 exhausts the heat outwards through the through hole 4. In order to prevent external dust from entering the device through the through hole 4 and further polluting and even damaging the internal structure of the device, the inner wall of the through hole 4 is provided with a dustproof net.

The inner side of the shell 1 is also fixedly connected with two refrigeration semiconductors 8, the two refrigeration semiconductors 8 are positioned above the heat conducting plate 7 and are arranged in bilateral symmetry, and the effect of reducing the temperature in the cavity is achieved. The upper surface of the heat conduction plate 7 is paved with absorbent paper, the outer edge of the upper end surface of the heat conduction plate 7 is provided with a baffle plate, and the surface of the clutch 6 is provided with a waterproof layer. When the device is in a high-temperature humid environment, water vapor in the cavity is liquefied and condensed into small water drops after meeting cold due to the refrigerating effect of the refrigerating semiconductor 8, the water absorption paper on the heat conduction plate 7 can absorb the small water drops in time to prevent the small water drops from dropping on the clutch 6, and meanwhile, the heat dissipation effect is improved by absorbing the water evaporation of the small water drops. When the environmental humidity is further increased and water drops generated by the steam liquefaction in the case of cold are more, the baffle arranged on the outer edge of the upper end surface of the heat conduction plate 7 can effectively prevent the water drops from dropping on the surface of the clutch 6 along the heat conduction plate 7. Even if a small amount of water drops on the clutch 6, the clutch 6 is not easily damaged due to the waterproof layer provided on the surface thereof. Two air holes 10 which are oppositely arranged are further drilled on the left side surface and the right side surface of the shell 1, the air holes 10 are located in the heat conducting plate 7 to be distributed, so that outside cold air can enter the device conveniently, and meanwhile, dust screens are also arranged on the inner walls of the air holes 10 to prevent outside dust from entering the device through the air holes 10.

When an operator uses the device, a large amount of hot air can be accumulated in the shell 1 due to the long-time work of the clutch 6, at the moment, the heat in the device is transferred to the heat dissipation plate 3 through the heat conductivity of the shell 1, and the heat dissipation effect is achieved through the heat dissipation function of the heat dissipation plate 3 and the heat dissipation holes 5. Can conduct the heat that clutch 6 produced to the cavity that heat-conducting plate 7 up end and shell 1 constitute rapidly through heat-conducting plate 7, the refrigeration effect of refrigeration semiconductor 8 in the rethread cavity for the inside hot-air of device effectively cools down, and the inside hot-air of device is outwards discharged through-hole 4 through exhaust fan 9 in the cavity simultaneously and is dispersed, and makes outside cold air enter into the device inside through bleeder vent 10. Under the combined action of the heat dissipation plate 3 and the heat dissipation holes 5 thereof, the through holes 4 and the exhaust fan 9, the heat conduction plate 7, the refrigeration semiconductor 8 and the air holes 10 connected with the through holes, the heat generated by the clutch 6 can be effectively dissipated in time, and the service life of the wheelchair is prolonged.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A heat dissipation protection device for a clutch of an electric wheelchair is characterized by comprising a shell (1) accommodating the clutch (6), wherein at least one exhaust fan (9) is arranged in the shell (1), and the exhaust fan (9) is positioned above the clutch (6); a through hole (4) corresponding to the exhaust fan (9) is formed in the side face of the shell (1), and the air outlet end of the exhaust fan (9) is aligned to the through hole (4); a heat conducting plate (7) is further arranged in the shell (1), the heat conducting plate (7) is positioned between the clutch (6) and the exhaust fan (9) in height, and the lower end face of the heat conducting plate (7) is a wavy curved surface; a refrigeration part is also arranged in the shell (1), the refrigeration part is arranged above the heat conduction plate (7), and a water absorption material is laid on the upper end face of the heat conduction plate (7); the water absorbing material comprises water absorbing paper, and the refrigeration component comprises a refrigeration semiconductor (8); the outer edge of the upper end face of the heat conducting plate (7) is provided with a baffle, and the surface of the clutch (6) is provided with a waterproof layer; the heat-conducting plate (7) is an L-shaped heat-conducting plate, and the upper end face of the heat-conducting plate (7) and the shell (1) form a heat-radiating cavity.

2. The heat dissipation protector for the clutch of the electric wheelchair as claimed in claim 1, wherein the number of the through holes (4) is not less than one pair, and each pair of the through holes (4) are oppositely arranged.

3. The heat dissipation protection device for the clutch of the electric wheelchair as claimed in any one of claims 1 to 2, wherein a heat dissipation plate (3) is connected to the upper end surface of the housing (1), the heat dissipation plate (3) is provided with heat dissipation holes (5), the housing (1) is made of a heat conductive material, and the heat conductive material comprises aluminum and iron.

4. The heat radiation protection device for the clutch of the electric wheelchair as claimed in any one of claims 1 to 2, wherein a dust screen is arranged between the air outlet end of the exhaust fan (9) and the through hole (4).

5. The heat dissipation protection device for the clutch of the electric wheelchair as claimed in any one of claims 1 to 2, wherein the casing (1) is connected with the protection door (2), and the casing (1) or/and the protection door (2) is made of high temperature resistant materials, and the high temperature resistant materials comprise glass fibers and ceramic fibers.

6. The heat-dissipation protection device for the clutch of the electric wheelchair as claimed in claim 5, wherein the protection door (2) is hinged with the housing (1).

7. The heat radiation protection device for the clutch of the electric wheelchair as claimed in any one of claims 1 to 2, wherein the side of the housing (1) is provided with at least one pair of air holes (10), and each pair of air holes (10) are oppositely arranged.