External expansion box wheel-side hydrostatic transmission continuously variable transmission

Abstract

The utility model relates to a transmission mechanism, in particular to a wheel-side hydrostatic transmission continuously variable transmission with an external expansion box. Comprising a transmission body, an external expansion box is arranged outside the transmission body, the external expansion box is fixedly installed on a shell of the transmission body, and the interior of a box body of the expansion box is communicated with the interior of the transmission body. The wheel-side hydrostatic transmission continuously variable transmission with the external expansion box has the advantages that maintenance and replacement are convenient, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a transmission mechanism, concretely relates to a wheel edge hydrostatic transmission continuously variable transmission of external expansion tank. BACKGROUND

[0002] US6775976B1 discloses a zero rotation hydrostatic transmission mechanism, which uses an internal expansion tank structure, as described in its specification, the expansion tank (91) is installed in the housing of the transmission body, near the driving gear (94), since the expansion tank needs to pass the gas in it to the atmosphere, and also needs to prevent the backflow of external liquid solid substances, a gas permeable valve needs to be installed at the gas passage hole, which needs to be waterproof, dustproof and gas permeable. Extreme harsh or changeable environmental conditions can cause pressure changes, causing stress on the seals of outdoor equipment, resulting in seal failure, allowing dirt to enter the equipment and damage sensitive electronic components.

[0003] The above-mentioned gas permeable valve installed on the expansion tank needs to be tested by multiple independent laboratories and obtain relevant qualifications before installation and use, for example, protection level test, i.e. the ability to prevent particles and water from entering; temperature test, i.e. durability test in high temperature environment and failure test in low temperature environment; vibration resistance test, flammability test, salt spray test, ultraviolet resistance test, corrosive gas test, etc. Since the expansion tank is installed inside the housing, the placement of the expansion tank may affect the main transmission structure components, so the detection is extremely strict. This greatly increases the production cost and time cost.

[0004] And the internal expansion tank needs to be disassembled for maintenance and replacement, which is more troublesome, and also affects the transmission performance and sealing performance of the transmission as a whole. SUMMARY

[0005] The utility model intends to provide a wheel edge hydrostatic transmission continuously variable transmission of external expansion tank which can be easily repaired and replaced, and reduce production cost.

[0006] The wheel edge hydrostatic transmission continuously variable transmission of external expansion tank in the scheme comprises a transmission body, an external expansion tank is arranged outside the transmission body, the external expansion tank is fixedly installed on the shell of the transmission body, and the tank body of the expansion tank is in communication with the inside of the transmission body.

[0007] The external expansion tank is arranged outside the shell of the transmission body, without occupying the space inside the transmission body, and the transmission structure inside the transmission body will not be affected if the external expansion tank fails, and the external expansion tank can be repaired and replaced without disassembling the transmission as a whole.

[0008] Further, the external expansion tank is provided with a vent pipe, one end of which is communicated with the external expansion tank, and the other end is communicated with the outside.

[0009] Further, the tank body of the external expansion tank is fixed to the shell of the transmission body by bolts.

[0010] Further, the external expansion tank is connected with the shell of the transmission body through the self-provided vent joint.

[0011] Further, the shell of the transmission body comprises a large gear machine shell, and a vent passage is formed in the large gear machine shell, BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front view of the external expansion tank wheel edge static liquid transmission continuously variable transmission embodiment one of the utility model;

[0013] Figure 2 It is Figure 1 A-A section view in the middle;

[0014] Figure 3 It is Figure 2 Enlarged view at B in the middle;

[0015] Figure 4 It is a perspective view of the external expansion tank wheel edge static liquid transmission continuously variable transmission embodiment one of the utility model;

[0016] Figure 5 It is a front view of the self-provided vent joint in the embodiment one of the utility model;

[0017] Figure 6 It is Figure 5 Sectional view at C-C in the middle;

[0018] Figure 7 It is a perspective view of the self-provided vent joint in the embodiment one;

[0019] Figure 8 It is a sectional view of the front view of the embodiment two of the utility model;

[0020] Figure 9 It is Figure 8 Enlarged view at D in the middle;

[0021] Figure 10 It is the structural schematic diagram of the external expansion tank in the embodiment two. DETAILED DESCRIPTION

[0022] The utility model will be further explained in detail in combination with the drawings and specific embodiment: EMBODIMENT

[0023] According to Figures 1 to 7As shown, the external expansion tank wheel edge hydrostatic transmission in the present scheme comprises a transmission body 1, and an external expansion tank 2 is arranged outside the transmission body 1. The external expansion tank 2 is fixedly installed on the shell of the transmission body 1. In the present embodiment, an installation plate 3 is arranged on the tank body of the external expansion tank 2, and the tank body of the external expansion tank 2 is bolted to the shell of the transmission body 1 through the installation plate 3. An air pipe 4 is arranged on the external expansion tank 2, one end of the air pipe 4 is communicated with the internal expansion tank 2, and the other end is communicated with the external atmosphere.

[0024] The tank body of the external expansion tank 2 is communicated with the inside of the transmission body 1. In the present embodiment, the external expansion tank 2 is connected to the shell of the transmission body 1 through the self-provided air pipe joint 5.

[0025] See Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 The main body of the self-provided air pipe joint 5 comprises an air pipe column 5-1, and an air passage 5-2 is arranged in the air pipe column 5-1. One end of the air passage 5-2 in the air pipe column 5-1 penetrates, and the other end is closed and inserted into the air tunnel 7 in the transmission body 1. The air tunnel 7 is arranged at the large gear box 6 of the transmission body 1. An outer thread is arranged in the middle section of the column body of the air pipe column 5-1. Four air holes 5-1 are arranged on one side of the column body of the air pipe column 5-1, and the air holes 5-1 are arranged at the closed end of the air passage 5-2. The air holes 5-1 are communicated with the air passage 5-2. The air pipe column 5-1 with the air holes 5-1 is fixedly connected to the transmission body 1 through the outer thread, and the other end of the air pipe column 5-1 is in interference fit with the external expansion tank 2.

[0026] As a further improvement of the present embodiment, an outer hexagonal dismounting hole 5-1 is fixedly arranged on the air pipe column 5-1, and the outer hexagonal dismounting hole 5-1 is arranged on the other side of the outer thread away from the air holes 5-1. The inner hexagonal wrench can be used to quickly install and dismount.

[0027] The external expansion tank 2 is arranged outside the shell of the transmission body 1, without occupying the space inside the transmission body 1. Moreover, if the external expansion tank 2 has a problem, it will not affect the transmission structure inside the transmission. The external expansion tank 2 can be dismounted for maintenance and replacement. Embodiment

[0028] As Figure 8 、 Figure 9 、 Figure 10As shown, the external expansion tank wheel edge hydrostatic transmission in the present scheme is different from the first embodiment in that the self-provided venting connector 5 is integrally formed with the tank body of the external expansion tank 2, the self-provided venting connector 5 is provided with a sealing ring 8, the self-provided venting connector 5 is tightly fitted into the venting tunnel 7 in the housing of the transmission body 1, and the venting tunnel 7 is arranged at the large gear box 6 of the transmission body 1.

[0029] As a further improvement of the present embodiment, the self-provided venting connector 5 is a cylindrical structure, the self-provided venting connector 5 is provided with a plurality of layers of reinforcing plates 9, in the present embodiment, the self-provided venting connector is provided with two layers of reinforcing plates 9. A venting through hole 11 is arranged at the center of the reinforcing plate 9, a clamping groove 10 is arranged outside the cylinder of the self-provided venting connector 5 corresponding to the reinforcing plate, in the present embodiment, the clamping groove 10 is provided with two, and a sealing ring 8 is arranged in each clamping groove.

[0030] The above is only an embodiment of the present application, and the well-known specific structures and properties in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. A hydrostatic continuously variable transmission with an external expansion tank and a wheel rim, comprising a transmission body, characterized in that: The transmission body is externally provided with an external expansion tank which is fixedly installed on the shell of the transmission body, and the tank body of the expansion tank is in communication with the interior of the transmission body.

2. The external expansion-tank hub hydrostatic continuously variable transmission according to claim 1, characterized in that The external expansion tank is provided with a breather pipe which is in communication with the interior of the external expansion tank at one end and with the outside at the other end.

3. The external expansion-tank hub hydrostatic continuously variable transmission according to claim 1, characterized in that: The tank body of the external expansion tank is fixed to the shell of the transmission body by bolts.

4. The external expansion-tank hub hydrostatic continuously variable transmission of claim 1, wherein: The external expansion tank is connected to the shell of the transmission body by a self-provided breather joint.

5. The external expansion-tank hub hydrostatic continuously variable transmission according to claim 4, characterized in that The self-provided breather joint comprises a breather column which is internally provided with a breather channel, the column body of the breather column is externally provided with external threads, the column body of the breather column on one side of the external threads is provided with a plurality of breather holes which are in communication with the breather channel, and one end of the breather holes is connected to the shell of the transmission body by the self-provided breather joint.

6. The external expansion-tank hub hydrostatic continuously variable transmission of claim 4, wherein: The self-provided breather joint and the tank body of the external expansion tank are integrally formed, the self-provided breather joint is externally provided with a plurality of sealing rings, and the self-provided breather joint is tightly fitted into the breather tunnel in the shell of the transmission body.

7. The external expansion-tank hub hydrostatic continuously variable transmission according to claim 6, characterized in that The self-provided breather joint is in a cylindrical structure, the self-provided breather joint is internally provided with a plurality of layers of reinforcing plates, a breather through hole is formed in the center of the reinforcing plates, clamping grooves are formed on the column body of the self-provided breather joint corresponding to the reinforcing plates, and the sealing rings are arranged in the clamping grooves.

8. The external expansion-tank hub hydrostatic continuously variable transmission according to claim 7, characterized in that The self-provided breather joint is internally provided with two layers of reinforcing plates.

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