A high and low pressure oil circuit transmission system for a hybrid power transmission

Abstract

The present invention relates to a high-low pressure oil circuit transmission system of a hybrid power transmission gearbox, which comprises: a support seat, in which a plurality of first oil delivery channels are provided; an input shaft, which is rotatably arranged at the axis of the support seat, in which a plurality of second oil delivery channels are provided and a plurality of annular grooves corresponding to the plurality of second oil delivery channels are provided on its circumferential surface; an oil separator ring, which is detachably mounted in the support seat and sleeved outside the input shaft; the oil separator ring is provided with a plurality of axial grooves corresponding to the plurality of first oil delivery channels and a plurality of radial holes corresponding to the plurality of annular grooves, and a radial hole is provided in each of the axial grooves. Thus, the transmission problem of multiple oil circuits with different pressures between the fixed part and the rotating part is solved, and the structural design is compact, the oil circuit transmission is reliable, the processing technology is simple, and it is easy to mass produce.

Description

Technical Field

[0001] The invention relates to an oil circuit transmission system, in particular to a high- and low-pressure oil circuit transmission system of a hybrid power transmission gearbox. Background Art

[0002] Existing oil circuit structure solutions are mostly used to solve the transmission of oil circuits with the same pressure between fixed parts. There is no efficient and reliable solution for the transmission of multiple oil circuits with different pressures between fixed parts and rotating parts, which cannot meet the transmission requirements of high and low pressure oil circuits in hybrid transmissions in the automotive industry. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a high and low pressure oil circuit transmission system for a hybrid power transmission.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: a high-low pressure oil circuit transmission system of a hybrid power transmission, which comprises:

[0005] A support seat, wherein a plurality of first oil delivery passages are provided in the support seat;

[0006] An input shaft, the input shaft is rotatably arranged at the axis of the support seat, a plurality of second oil delivery passages are provided in the input shaft, and a plurality of annular grooves corresponding to the plurality of second oil delivery passages are provided on the peripheral surface of the input shaft;

[0007] An oil separator ring is detachably mounted in the support seat and sleeved on the outside of the input shaft; the oil separator ring is provided with a plurality of axial grooves corresponding to the plurality of first oil delivery passages and a plurality of radial holes corresponding to the plurality of annular grooves, and each of the axial grooves is provided with one radial hole.

[0008] Optimally, an interference fit is formed between the outer surface of the oil separator ring and the support seat; and a clearance fit is formed between the inner surface of the oil separator ring and the support seat.

[0009] Furthermore, the number of the annular grooves is defined as N, and N+1 mounting grooves are also provided on the circumferential surface of the input shaft, and the N+1 mounting grooves are respectively located on both sides of the annular groove and between two adjacent annular grooves; a sealing ring matching the oil separator ring is installed in each mounting groove.

[0010] Optimally, it also includes a plurality of flat keys installed in the support seat and the oil separator ring.

[0011] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the high and low pressure oil circuit transmission system of the hybrid transmission of the present invention installs an oil separator ring of a specific structure between the support seat and the input shaft. When the input shaft rotates, the pressure oil with different pressures in the hydraulic system is transported to the input shaft through the multiple first oil delivery channels on the support seat via the oil separator ring, thus solving the transmission problem of multiple oil circuits with different pressures between the fixed part and the rotating part. In addition, the structural design is compact, the oil circuit transmission is reliable, the processing technology is simple, and it is easy to mass produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a cross-sectional view of the high and low pressure oil circuit transmission system of the hybrid power transmission gearbox of the present invention;

[0013] Attached Figure 2 It is a structural schematic diagram of an oil separator ring in a high- and low-pressure oil circuit transmission system of a hybrid power transmission gearbox of the present invention;

[0014] Attached Figure 3 It is a schematic diagram of the structure of the input shaft in the high and low pressure oil circuit transmission system of the hybrid power transmission of the present invention. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0016] like Figure 1 The high- and low-pressure oil circuit transmission system of the hybrid transmission shown mainly includes a support seat 1, an oil separator ring 2 and an input shaft 3, etc.

[0017] Among them, a plurality of first oil delivery channels 11 are opened in the support seat 1; one end of each first oil delivery channel 11 forms a first oil inlet on the end surface of the support seat 1, which is used to introduce pressure oil from the hydraulic system into the support seat 1; in the present embodiment, there are three first oil delivery channels 11, which are spaced apart from each other and do not interfere with each other, so as to deliver pressure oil of different pressures (of course, if the pressures of the multiple pressure oils are the same, they can also be used). The input shaft 3 is rotatably arranged at the axis center line of the support seat 1 (when working, the input shaft 3 and the support seat 1 rotate relative to each other and the axial position is fixed), and a plurality of second oil delivery passages 31 having the same number as the first oil delivery passages 11 are opened therein; a second oil inlet is formed at one end of each second oil delivery passage 31 on the peripheral surface of the input shaft 3, which is used to introduce the pressure oil from the hydraulic system into the input shaft 3; a plurality of annular grooves 8 are also opened on the peripheral surface of the input shaft 3 (the axis center line of the annular groove 8 coincides with the axis center line of the input shaft 3), and the plurality of annular grooves 8 correspond one-to-one with the plurality of second oil delivery passages 31 (and also correspond one-to-one with the second oil inlet; that is, annular grooves 8 are respectively machined at the three second oil inlets of the input shaft 3, such as Figure 3As shown); in this embodiment, the second oil delivery channel 31 and the annular groove 8 are three channels to deliver pressure oil with different pressures. The oil distribution ring 2 is detachably installed in the support seat 1 and sleeved outside the input shaft 3, that is, it is installed between the support seat 1 and the input shaft 3; its structure is as shown Figure 2 As shown, a plurality of axial grooves 6 corresponding to the plurality of first oil delivery passages 11 and a plurality of radial holes 7 corresponding to the plurality of annular grooves 8 are provided on the main body of the oil separator 2 (i.e., the depth of the axial grooves 6 is less than the wall thickness of the oil separator 2, so that a radial hole 7 is provided in each axial groove 6); in this embodiment, the number of the axial grooves 6 and the radial holes 7 are also three. Thus, the basic working principle of the high and low pressure oil circuit transmission system of the hybrid transmission gearbox is as follows: when the input shaft 3 is working and rotating, the pressure oil with different pressures from the hydraulic system flows to the corresponding axial grooves 6 on the oil separator 2 through the plurality of first oil delivery passages 11 on the support seat 1 (usually the front bearing support plate, which is installed on other components), then flows to the plurality of annular grooves 8 on the input shaft 3 through the corresponding radial holes 7 of the oil separator 2, and then flows to the interior of the input shaft 3 through the plurality of second oil delivery passages 31, thereby realizing the transmission problem of multiple different pressure oil circuits between the fixed part and the rotating part.

[0018] In this embodiment, the outer surface of the oil separator 2 and the support seat 1 are in interference fit, so that different pressure oil circuits are completely isolated and there is no loss of pressure and flow; preferably, they are made of the same material, so that the two parts can still ensure interference fit when the ambient temperature changes, and ensure the isolation effect between different pressure oil circuits. The inner surface of the oil separator 2 and the support seat 1 are in clearance fit, which prevents the input shaft 3 from contacting the inner surface of the oil separator 2 when rotating, so as to reduce friction resistance. The number of annular grooves 8 is 3, and 4 mounting grooves are also opened on the circumference of the input shaft 3, and the 4 mounting grooves are respectively located on both sides of the annular groove 8 and between two adjacent annular grooves 8 (that is, the mounting grooves and the annular grooves 8 are alternately arranged); a rectangular sealing ring 32 matched with the oil separator 2 is installed in each mounting groove, so that the oil circuit between the oil separator 2 and the input shaft 3 can be isolated, and it is ensured that there is no leakage when the hydraulic oil is transmitted to the annular groove 8 on the input shaft 3 through the radial hole 7 of the oil separator 2, so as to ensure the reliable transmission of the pressure and flow of the pressure oil circuit. A plurality of keyways are arranged on the mating surfaces of the oil separator ring 2 and the support seat 1 to install the flat key 4 (the positions of these keyways avoid the axial groove 6) so as to realize the positioning, fixation and detachability of the support seat 1 and the oil separator ring 2 in the circumferential direction so that the two cannot move relative to each other.

[0019] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A high and low pressure oil circuit transmission system for a hybrid transmission, characterized in that: It includes: A support seat, wherein a plurality of first oil delivery passages are provided in the support seat; An input shaft, the input shaft is rotatably arranged at the axis of the support seat, a plurality of second oil delivery passages are provided in the input shaft, and a plurality of annular grooves corresponding to the plurality of second oil delivery passages are provided on the peripheral surface of the input shaft; An oil separator ring is detachably mounted in the support seat and sleeved on the outside of the input shaft; the oil separator ring is provided with a plurality of axial grooves corresponding to the plurality of first oil delivery passages and a plurality of radial holes corresponding to the plurality of annular grooves, each of the axial grooves is provided with one radial hole, and the depth of the axial groove is less than the wall thickness of the oil separator ring; an outer surface of the oil separator ring is interference fit with the support seat.

2. The hybrid transmission high and low pressure oil circuit transmission system according to claim 1, characterized in that: There is a clearance fit between the inner surface of the oil separator ring and the support seat.

3. The hybrid power transmission high and low pressure oil circuit transmission system according to claim 2 is characterized in that: The number of the annular grooves is defined as N, and the circumferential surface of the input shaft is further provided with N+1 mounting grooves, which are respectively located on both sides of the annular groove and between two adjacent annular grooves; a sealing ring matching the oil separator ring is installed in each mounting groove.

4. The hybrid power transmission high and low pressure oil circuit transmission system according to claim 1, characterized in that: The utility model also comprises a plurality of flat keys which are installed in the support seat and the oil dividing ring.

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