Torque adjusting structure of hydraulic retarder

Abstract

The utility model provides a torque adjusting structure of a hydraulic retarder, and belongs to the technical field of hydraulic retarders. The oil cooler comprises a middle cover, a rear cover and an oil cooler body, the rear cover is connected with the middle cover and the oil cooler body through fastening screws, oil through holes are correspondingly formed in the rear cover and the oil cooler body, throttling ring installation grooves are formed in the side wall, close to the oil through holes, of the rear cover, and throttling rings are arranged in the throttling ring installation grooves. The throttling ring mounting groove is located at the end of the oil through hole and communicates with the oil through hole, and a throttling ring is arranged in the throttling ring mounting groove; by means of the design that a traditional throttling piece is changed into the throttling ring, use of a locking screw is avoided, the throttling ring can be directly arranged in a specially-designed installation groove in a buckled mode, the assembling and maintaining process of the device is simplified, and the throttling ring can be replaced more rapidly and conveniently; and when the throttling ring needs to be replaced, only the oil cooler needs to be disassembled, the process of disassembling and assembling the throttling piece is omitted, and the damage probability of the device is reduced while more convenience is achieved.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic retarders, in particular to a torque regulating structure of a hydraulic retarder. Background Art

[0002] Hydraulic retarders, also known as hydraulic deceleration devices, are mainly used in large vehicles, especially when facing long downhill sections. They use liquid damping to produce a retarding effect, converting the vehicle's kinetic energy into heat energy, which is taken away by the engine's circulating coolant for heat dissipation. This device can effectively reduce vehicle speed without damaging the engine, share the pressure of the main brake system, improve vehicle operating efficiency, reduce brake wear, and extend tire life. In a hydraulic retarder, the resistance generated by the working oil in the working chamber formed by the rotor and the stator is mainly used to slow down the torque (or torque) of the rotor. Therefore, the oil pressure in the working chamber formed by the stator and rotor is crucial to the regulation of torque.

[0003] In the prior art, the high-temperature working oil flowing out of the working oil chamber passes through the oil tank middle cover and the rear cover through the oil path to flow to the oil cooler for heat dissipation. However, in order to make the working oil in the working oil chamber have sufficient resistance, the prior art realizes the retarder torque adjustment by installing a throttle plate of fixed aperture at the oil outlet cavity formed by the stator and rotor oil outlet and the middle cover. The throttle plate is installed on the retarder middle cover, between the front cover assembly and the middle cover. However, due to the large number of product parts, when adjustment is required, the parts need to be disassembled one by one before the throttle plate can be replaced. If the performance cannot meet the requirements, repeated operations are required for adjustment, which is very inconvenient to replace. In addition, the throttle plate usually needs locking screws on both sides to fix it. Once the throttle plate is fixed by the locking screws, it is necessary to remove the screws first to adjust or maintain it, which increases the time and complexity of maintenance or adjustment work. Especially in the scenario where the throttle plate needs to be adjusted frequently to optimize performance, this design may become particularly inconvenient.

[0004] How to invent a hydraulic retarder torque adjustment structure to improve these problems has become an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a hydraulic retarder torque adjustment structure, aiming to improve the problems mentioned in the above background.

[0006] The utility model is achieved in this way:

[0007] The utility model provides a torque adjustment structure of a hydraulic retarder, comprising a middle cover, a rear cover and an oil cooler, wherein the rear cover and the oil cooler are installed and connected with the middle cover by fastening screws, oil holes are correspondingly arranged inside the rear cover and the oil cooler, a throttle ring installation groove is arranged on the side wall of the rear cover close to the oil hole, the throttle ring installation groove is located at the end of the oil hole and is connected to the oil hole, and a throttle ring is arranged inside the throttle ring installation groove.

[0008] Preferably, the throttle ring is located between the rear cover and the oil cooler, and the throttle ring is located at the connection between the oil inlet of the oil cooler and the oil outlet of the rear cover.

[0009] Preferably, a through hole is provided through the middle of the throttling ring, and the diameter of the through hole is smaller than the inner diameter of the oil through hole.

[0010] Preferably, the outer ring diameter of the throttle ring installation groove is larger than the diameter of the oil through hole, and the throttle ring is centrally snap-fitted inside the throttle ring installation groove.

[0011] Preferably, an O-ring installation groove is provided on the side wall of the rear cover close to the throttle ring installation groove, and an O-ring is provided inside the O-ring installation groove.

[0012] The beneficial effects of the utility model are:

[0013] 1. By replacing the traditional throttle plate with a throttle ring design, this technology avoids the use of locking screws. The throttle ring can be directly buckled and set in a specially designed installation groove. This design significantly simplifies the assembly and maintenance process, making the replacement of the throttle ring faster and more convenient; since the throttle ring can be easily replaced as needed, the pressure and torque inside the hydraulic retarder can be accurately adjusted by using throttle rings of different diameters. Such flexibility enables the equipment to adapt to the needs of different working conditions and improve the applicability and performance of the equipment;

[0014] 2. When the throttle hole needs to be adjusted due to performance deviation caused by different batches of blanks, the screws of the oil cooler can be removed, the oil cooler can be removed to replace the throttle ring, and then the oil cooler can be installed by tightening the screws. The replacement is convenient, which reduces labor intensity and shortens downtime. In addition, it also reduces the damage to the device or sealing problems caused by over-tightening or over-loosening the screws, reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1It is a schematic diagram of an exploded structure of a torque regulating structure of a hydraulic retarder provided by an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional position of a torque adjustment structure of a hydraulic retarder provided by an embodiment of the utility model;

[0018] Figure 3 yes Figure 2 Enlarged view of the cross-section location layout.

[0019] In the figure: 1, middle cover; 2, rear cover; 21, oil hole; 22, throttle ring mounting groove; 23, O-ring mounting groove; 3, oil cooler; 4, throttle ring; 41, through hole; 5, O-ring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example

[0022] Reference Figure 1-Figure 3 A hydraulic retarder torque adjustment structure, wherein the hydraulic retarder comprises a middle cover 1, a rear cover 2 and an oil cooler 3, the rear cover 2 and the oil cooler 3 are installed and connected with the middle cover 1 by fastening screws, the middle cover 1 and the rear cover 2 are the main parts of the hydraulic retarder, they are connected by fastening screws, provide structural stability and sealing performance, these covers protect the internal components from external pollution, and also accommodate the main operating mechanism of the hydraulic retarder, the oil cooler 3 is responsible for cooling the working oil flowing through the retarder, and the high-temperature oil dissipates heat through the oil cooler 3 to maintain the system To ensure the temperature stability of the hydraulic retarder and the normal operation of the hydraulic retarder, the rear cover 2 and the oil cooler 3 are correspondingly provided with oil holes 21, which are located inside the rear cover 2 and the oil cooler 3 to ensure that the working oil can flow from the retarder to the oil cooler 3. The size of these holes directly affects the flow rate of the oil and the pressure in the system. A throttle ring mounting groove 22 is provided on the side wall of the rear cover 2 close to the oil hole 21. The throttle ring mounting groove 22 is located at the end of the oil hole 21 and is connected to the oil hole 21. A throttle ring 4 is provided inside the throttle ring mounting groove 22.

[0023] It should be noted that: the throttle ring 4 is located between the rear cover 2 and the oil cooler 3, the throttle ring 4 is at the connection between the oil inlet of the oil cooler 3 and the oil outlet of the rear cover 2, and a through hole 41 is provided in the middle of the throttle ring 4. The diameter of the through hole 41 is smaller than the inner diameter of the oil hole 21, and the outer ring diameter of the throttle ring mounting groove 22 is larger than the diameter of the oil hole 21. The throttle ring 4 limits the oil flow through the central through hole, thereby providing a simple and effective way to adjust the pressure and torque inside the hydraulic retarder. The design of the throttle ring 4 makes replacement and adjustment easy, and the system performance can be adjusted by replacing throttle rings 4 of different diameters.

[0024] Further, refer to Figure 3 The throttle ring 4 is centrally snap-fitted inside the throttle ring mounting groove 22. Compared with the traditional throttle plate design, this design is easier to install and maintain, because the throttle ring 4 can be simply placed in the throttle ring mounting groove 22 without the need for locking screws. An O-ring mounting groove 7 is provided on the side wall of the rear cover 2 close to the throttle ring mounting groove 22, and an O-ring 5 is provided inside the O-ring mounting groove 7. It should be noted that the O-ring 5 is provided next to the throttle ring mounting groove 22 to provide a seal between the rear cover 2 and the oil cooler 3 to prevent leakage of the working oil. This sealing method helps to maintain system pressure and ensures that the oil flows only through the central through hole of the throttle ring 4 without leaking in unexpected areas.

[0025] The working principle of the torque adjustment structure of a hydraulic retarder of the utility model is mainly to adjust the installation position of the throttle plate in the prior art to between the oil tank rear cover 2 and the oil cooler 3, and at the same time change the throttle plate with two holes into a throttle ring 4. The throttle plate of the prior art needs to be fixed by locking screws on both sides, while the throttle ring 4 in the present case can be directly set in the throttle ring installation groove 22 of the rear cover 2. There is originally an oil through hole 21 for oil circulation between the rear cover 2 and the oil cooler 3. In the present case, an oil through hole 21 is milled out to allow the oil to circulate. The installation groove for placing the throttle ring 4 (i.e., the throttle ring installation groove 22) makes it much more convenient to assemble and adjust the assembly. When the throttle hole needs to be adjusted due to performance deviation caused by different batches of blanks, the five screws of the oil cooler 3 can be unscrewed, the oil cooler 3 can be removed, the throttle ring 4 can be replaced, and then the oil cooler 3 can be installed. Finally, the five screws can be tightened to install it. The replacement is convenient, and only the oil cooler 3 needs to be disassembled, eliminating the process of disassembling and assembling the throttle plate, making disassembly and assembly more convenient, and also avoiding damage to parts during the disassembly and assembly process.

[0026] The throttle ring 4 is installed between the rear cover 2 and the oil cooler 3, just located at the connection between the oil inlet of the oil cooler 3 and the oil outlet 2 of the rear cover. The diameter of the through hole in the middle of the throttle ring 4 is smaller than the inner diameter of the oil hole 21, so the throttle ring 4 limits the oil flow through its central through hole. This design allows the pressure and torque inside the hydraulic retarder to be adjusted by replacing throttle rings 4 of different diameters, thereby achieving precise control of the performance of the equipment; and the throttle ring 4 is designed to be easy to install and maintain, because it can be directly buckled into the throttle ring mounting groove 22 without the use of locking screws. This design not only simplifies the maintenance process, but also makes it faster and more convenient to replace the throttle ring 4 as needed.

[0027] The O-ring 5 is arranged in the O-ring mounting groove 7 next to the throttle ring mounting groove 22 to provide a seal between the rear cover 2 and the oil cooler 3. This sealing method prevents leakage of the working oil and ensures that the oil flows only through the central through hole of the throttle ring 4 to maintain a stable system pressure.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A torque adjustment structure of a hydraulic retarder, the hydraulic retarder comprising a middle cover (1), a rear cover (2) and an oil cooler (3), characterized in that: The rear cover (2) and the oil cooler (3) are connected to the middle cover (1) by fastening screws. The rear cover (2) and the oil cooler (3) are provided with oil holes (21) in their interiors. A throttle ring mounting groove (22) is provided on the side wall of the rear cover (2) close to the oil hole (21). The throttle ring mounting groove (22) is located at the end of the oil hole (21) and is connected to the oil hole (21). A throttle ring (4) is provided inside the throttle ring mounting groove (22).

2. The torque adjustment structure of a hydraulic retarder according to claim 1, characterized in that: The throttle ring (4) is located between the rear cover (2) and the oil cooler (3), and the throttle ring (4) is located at the connection between the oil inlet of the oil cooler (3) and the oil outlet of the rear cover (2).

3. The torque adjustment structure of a hydraulic retarder according to claim 1, characterized in that: A through hole (41) is provided through the middle of the throttling ring (4), and the diameter of the through hole (41) is smaller than the inner diameter of the oil through hole (21).

4. The torque adjustment structure of a hydraulic retarder according to claim 1, characterized in that: The outer diameter of the throttle ring installation groove (22) is larger than the diameter of the oil through hole (21), and the throttle ring (4) is centrally buckled and arranged inside the throttle ring installation groove (22).

5. The torque adjustment structure of a hydraulic retarder according to claim 1, characterized in that: An O-ring installation groove (23) is arranged on the side wall of the rear cover (2) close to the throttle ring installation groove (22), and an O-ring (5) is arranged inside the O-ring installation groove (23).

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