Hydraulic retarder of automatic gearbox

Abstract

The utility model relates to a hydraulic retarder of an automatic gearbox, which comprises a retarder wheel body and further comprises a plurality of blades respectively fixed on a circle of the inner wall of the retarder wheel body. The integrated heat exchange mechanism is arranged in the multiple blades, the integrated heat exchange mechanism comprises multiple cavities, the multiple cavities are formed in the multiple blades, one end of each cavity is communicated with a retarder shaft shell, and arc-shaped through pipes are communicated among the multiple cavities. Water is input into the cavities of the multiple blades, and when the water enters the cavities of the blades, the blades can still keep rotating, so that the multiple blades make contact with hydraulic oil, heat exchange and cooling are actively conducted on different positions in the hydraulic oil, and the heat exchange and cooling effect is improved; water can circulate among the multiple blades, heat exchange water can circulate among the multiple blades, and heat exchange is more uniform.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic retarders, in particular to a hydraulic retarder for an automatic transmission. Background Art

[0002] Many serious traffic accidents on highways are caused by truck brake failure. If the vehicle is equipped with a retarder, when the brakes fail, the retarder can also play a deceleration effect, which can reduce the severity of traffic accidents or avoid accidents. At present, the mature retarders on the market are mainly divided into eddy current retarders and hydraulic retarders, and electric turbine retarders account for a large proportion.

[0003] According to the disclosed patent 202023090965.4, the automatic transmission hydraulic retarder includes: a handle; a proportional solenoid valve; a first valve core connected to the proportional solenoid valve; a second valve core that can reciprocate along a first direction to close or open the retarder inlet with a certain opening; a control unit connected to the proportional solenoid valve; and a moving wheel, which is provided with blades in the circumferential direction and can be driven by the first oil from the retarder inlet. The retarder has a simple design structure and can share oil with the automatic transmission, which is convenient for unified replacement and maintenance. In the process of realizing the utility model, the inventor found that at least the following problems in the prior art have not been solved: although the oil can be shared with the automatic transmission; it is convenient to replace and maintain the oil together with the transmission. The existing hydraulic retarder is often complex in structure and usually needs to design an independent oil circuit to drive the driving wheel to work, and the oil replacement and maintenance are difficult and costly. However, during use, the traditional automatic transmission hydraulic retarder, although the hydraulic oil will enter the retarder, the traditional hydraulic oil heat exchange is to set a heat exchange mechanism in the retarder and connect it to the water pipe. In this heat exchange method, the hydraulic oil cannot fully contact the heat exchange mechanism, resulting in a poor heat exchange and cooling effect, which easily causes the temperature of the retarder to exceed the transmission limit working temperature when it is working. For this reason, it is necessary to design a new technical solution to solve it. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art, meet the actual needs, and provide an automatic transmission hydraulic retarder to solve the current traditional automatic transmission hydraulic retarder. Although the hydraulic oil will enter the retarder, the traditional hydraulic oil heat exchange is to set a heat exchange mechanism in the retarder to communicate with the water pipe. In this heat exchange method, the hydraulic oil cannot fully contact the heat exchange mechanism, resulting in a poor heat exchange and cooling effect, which easily causes the temperature of the retarder to exceed the limit working temperature of the transmission when it is working. Technical problem.

[0005] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is: designing an automatic transmission hydraulic retarder, including a retarder wheel body, and also including:

[0006] A plurality of blades are respectively fixed to a circle of the inner wall of the retarder wheel body;

[0007] An integrated heat exchange mechanism is provided inside the plurality of blades, the integrated heat exchange mechanism comprises a plurality of cavities, the plurality of cavities are formed in the plurality of blades, one end of the cavity is connected to a retarder shaft housing, and an arc-shaped through pipe is connected between the plurality of cavities;

[0008] The front end of the retarder shaft housing is fixedly connected with a rotary joint, and the front end of the rotary joint is rotatably connected with a connecting pipe.

[0009] Preferably, the front end of the connecting pipe is a sealed structure.

[0010] Preferably, one side of the connecting pipe is connected to a first water pipe, one side of the first water pipe is connected to a water pump, one end of the water pump away from the first water pipe is connected to a second water pipe, and one end of the second water pipe away from the water pump is connected to a water tank.

[0011] Preferably, the bottom of the connecting pipe is connected to a third water pipe, the bottom of the third water pipe is connected to a water outlet pump, the bottom of the water outlet pump is connected to a fourth water pipe, and the bottom of the fourth water pipe is connected to a water tank.

[0012] Preferably, a graphite heat-conducting sleeve penetrates the outer wall of the arc-shaped through-tube, and the graphite heat-conducting sleeve is fixedly connected to the penetration position of the arc-shaped through-tube.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model directly uses multiple blades as heat exchange mechanisms through the combination of blades, cavities and arc-shaped through-tubes, and water can be input into the cavities of multiple blades. When water enters the cavities of the blades, the blades can still keep rotating, so that the multiple blades are in contact with the hydraulic oil, and different positions in the hydraulic oil are actively heat exchanged and cooled, thereby improving the effect of heat exchange and cooling. Moreover, the arc-shaped through-tubes are connected between the multiple blades to allow water to circulate between the multiple blades, so that the exchanged water water can circulate between the multiple blades, thereby performing heat exchange more evenly, solving the problem of traditional automatic transmission hydraulic retarder. Although the hydraulic oil will enter the retarder, the traditional hydraulic oil heat exchange is to set a heat exchange mechanism in the retarder to be connected with the water pipe. In this heat exchange method, the hydraulic oil cannot fully contact the heat exchange mechanism, resulting in a poor heat exchange and cooling effect, and it is easy to cause the temperature of the retarder to exceed the limit working temperature of the transmission when it is working.

[0015] 2. The utility model combines an arc-shaped through-tube and a graphite heat-conducting sleeve, and a graphite heat-conducting sleeve is arranged outside a plurality of arc-shaped through-tubes. The heat of the arc-shaped through-tubes can be dissipated through the graphite heat-conducting sleeve, thereby avoiding a rapid rise in water temperature and affecting the heat exchange effect during the flow of water between the arc-shaped through-tube and a plurality of blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the blades and the arc-shaped through pipe of the utility model.

[0018] In the figure: 1. retarder wheel body; 2. blades; 201. arc-shaped through pipe; 202. rotary joint; 203. connecting pipe; 204. first water pipe; 205. water pump; 206. second water pipe; 207. water tank; 208. third water pipe; 209. water outlet pump; 210. fourth water pipe; 211. retarder shaft housing; 212. cavity; 3. graphite heat-conducting sleeve. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0020] Embodiment 1: An automatic transmission hydraulic retarder, see Figure 1 to Figure 2, including a retarder wheel body 1, and also including: a plurality of blades 2, which are respectively fixed on a circle of the inner wall of the retarder wheel body 1; an integrated heat exchange mechanism, which is opened inside the plurality of blades 2, and the integrated heat exchange mechanism includes a plurality of cavities 212, the plurality of cavities 212 are formed in the plurality of blades 2, one end of the cavity 212 is connected with a retarder shaft housing 211, and the plurality of cavities 212 are connected with an arc-shaped through pipe 201; the front end of the retarder shaft housing 211 is fixedly connected with a rotary joint 202, and the front end of the rotary joint 202 is rotatably connected with a connecting pipe 203, and the hydraulic oil is first input into the hydraulic retarder, and during the rotation of the retarder wheel body 1, the rotary joint 202 will be driven to rotate around the connecting pipe 203, and then the water pump 205 is turned on, and the water in the water tank 207 is pumped into the reducer shaft housing through the second water pipe 206 and the first water pipe 204 through the water pump 205. Since the reducer shaft housing is connected with the cavity 212 in the plurality of blades 2, water can enter The plurality of blades 2 are in contact with the hydraulic oil, and heat exchange and cooling are actively performed on different positions in the hydraulic oil, thereby improving the effect of heat exchange and cooling. When the heat exchange is completed, the water pump 205 is turned off and the water outlet pump 209 is turned on, so that the water in the cavity 212 and the reducer shaft housing can be re-pumped into the water tank 207, thereby realizing the water heat exchange cycle. Moreover, the arc-shaped through pipe 201 is connected between the plurality of blades 2 to allow the water between the plurality of blades 2 to flow, so that the hot water can flow between the plurality of blades 2, and the heat exchange is performed more evenly. This solves the problem of the traditional automatic transmission hydraulic retarder. Although the hydraulic oil will enter the retarder, the traditional hydraulic oil heat exchange is to set a heat exchange mechanism in the retarder to be connected with the water pipe. In this heat exchange method, the hydraulic oil cannot fully contact the heat exchange mechanism, resulting in a poor heat exchange and cooling effect, and it is easy to cause the temperature of the retarder to exceed the limit working temperature of the transmission when it is working.

[0021] For details, see Figure 1 The front end of the connecting pipe 203 is a sealed structure.

[0022] For further information, see Figure 1 One side of the connecting pipe 203 is connected to the first water pipe 204, one side of the first water pipe 204 is connected to a water pump 205, the end of the water pump 205 away from the first water pipe 204 is connected to the second water pipe 206, and the end of the second water pipe 206 away from the water pump 205 is connected to a water tank 207.

[0023] It is worth noting that see Figure 1 The bottom of the connecting pipe 203 is connected to a third water pipe 208 , the bottom of the third water pipe 208 is connected to a water outlet pump 209 , the bottom of the water outlet pump 209 is connected to a fourth water pipe 210 , and the bottom of the fourth water pipe 210 is connected to a water tank 207 .

[0024] It is worth noting that see Figure 2A graphite heat-conducting sleeve 3 penetrates the outer wall of the arc-shaped through-tube 201, and the graphite heat-conducting sleeve 3 is fixedly connected to the penetration position of the arc-shaped through-tube 201. Graphite heat-conducting sleeves 3 are arranged outside the multiple arc-shaped through-tubes 201. The heat of the arc-shaped through-tube 201 can be dissipated through the graphite heat-conducting sleeve 3, thereby avoiding the rapid rise of water temperature during the flow of water between the arc-shaped through-tube 201 and the multiple blades 2, thereby affecting the heat exchange effect.

[0025] When using an automatic transmission hydraulic retarder, the hydraulic oil is first input into the hydraulic retarder. During the rotation of the retarder wheel body 1, the rotary joint 202 is driven to rotate around the connecting pipe 203. Then, the water pump 205 is turned on. The water in the water tank 207 is pumped into the reducer shaft housing through the second water pipe 206 and the first water pipe 204. Since the reducer shaft housing is connected to the cavity 212 in the multiple blades 2, the water can enter the multiple blades 2, so that the multiple blades 2 are in contact with the hydraulic oil, and heat exchange and cooling are actively performed at different positions in the hydraulic oil, thereby improving the effect of heat exchange and cooling. When the heat exchange is completed, the water pump 205 is turned off. The water pump 205 turns on the water outlet pump 209, and can pump the water in the cavity 212 and the reducer shaft housing back into the water tank 207, thereby realizing the water heat exchange cycle. Moreover, the arc-shaped through-tube 201 is connected between the multiple blades 2 to allow the water between the multiple blades 2 to flow, and the hot water can flow between the multiple blades 2 to exchange heat more evenly. A graphite heat-conducting sleeve 3 is arranged on the outside of the multiple arc-shaped through-tubes 201, and the heat of the arc-shaped through-tube 201 can be dissipated through the graphite heat-conducting sleeve 3 to dissipate the heat, thereby avoiding the rapid rise of water temperature during the circulation of water between the arc-shaped through-tube 201 and the multiple blades 2, thereby affecting the heat exchange effect.

[0026] In addition, the components designed in the present invention are all universal standard parts or components known to technical personnel in the field. Their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods. They can be fully implemented by technical personnel in the field, and there is no need to elaborate. The content protected by the present invention does not involve improvements to internal structures and methods.

[0027] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A hydraulic retarder for an automatic transmission, comprising a retarder wheel body (1), characterized in that: Also includes: A plurality of blades (2) are respectively fixed on a circle of the inner wall of the retarder wheel body (1); An integrated heat exchange mechanism is provided inside the plurality of blades (2), the integrated heat exchange mechanism comprising a plurality of cavities (212), the plurality of cavities (212) being formed inside the plurality of blades (2), one end of the cavity (212) being connected to a retarder shaft housing (211), and an arc-shaped through pipe (201) being connected between the plurality of cavities (212); The front end of the retarder shaft housing (211) is fixedly connected to a rotary joint (202), and the front end of the rotary joint (202) is rotatably connected to a connecting pipe (203).

2. The automatic transmission hydraulic retarder according to claim 1, characterized in that: The front end of the connecting pipe (203) is a sealed structure.

3. The automatic transmission hydraulic retarder according to claim 1, characterized in that: One side of the connecting pipe (203) is connected to a first water pipe (204), one side of the first water pipe (204) is connected to a water pump (205), one end of the water pump (205) away from the first water pipe (204) is connected to a second water pipe (206), and one end of the second water pipe (206) away from the water pump (205) is connected to a water tank (207).

4. The automatic transmission hydraulic retarder according to claim 1, characterized in that: The bottom of the connecting pipe (203) is connected to a third water pipe (208), the bottom of the third water pipe (208) is connected to a water outlet pump (209), the bottom of the water outlet pump (209) is connected to a fourth water pipe (210), and the bottom of the fourth water pipe (210) is connected to a water tank (207).

5. The automatic transmission hydraulic retarder according to claim 1, characterized in that: A graphite heat-conducting sleeve (3) penetrates the outer wall of the arc-shaped through-tube (201), and the graphite heat-conducting sleeve (3) is fixedly connected to the penetration position of the arc-shaped through-tube (201).

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