Gearbox brake and automobile

Abstract

The utility model discloses a gearbox brake and an automobile. The brake comprises a cylinder body, one end of the piston is installed in the cylinder body, the other end of the piston is located outside the cylinder body, and a reset platform is arranged at the end, located outside the cylinder body, of the piston; one end of the elastic piece is connected with the reset platform, and the other end of the elastic piece is connected with the cylinder body. The reset platform is arranged on the piston, then the elastic piece is installed on the reset platform in the radial direction, the original arrangement mode of multiple sets of spiral springs is replaced, and the problems that due to the fact that the restoring force of the springs is different, the piston is stressed unevenly, reset is clamped, and transmission gear shifting is abnormal are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gearboxes, and in particular relates to a gearbox brake and a car. Background Art

[0002] The AT transmission widely used in automobiles is an automatic transmission that transmits power through hydraulic transmission and gear combinations. It is mainly composed of a torque converter, a planetary gear set and a hydraulic system. Among them, the hydraulic system is the key to realizing gear shifting operations. It is used to control the flow direction and pressure of the hydraulic oil according to parameters such as vehicle speed and throttle opening, lock or unlock the clutch of the corresponding planetary gear set, thereby changing the working mode of the planetary gear set and achieving different transmission ratios.

[0003] Due to the large size of the AT clutch, the reset of its brake piston is usually achieved by symmetrically arranging multiple sets of coil springs. However, due to the differences in the assembly of the multiple sets of coil springs and the relaxation of the springs after long-term use, this will lead to differences in the restoring force of each spring. In severe cases, the piston is unevenly stressed, the reset is stuck, and the transmission shifts abnormally. Utility Model Content

[0004] The utility model provides a gearbox brake and a car, which are used to solve the problem that the rebound force of multiple groups of spiral springs is inconsistent when they are reset, resulting in uneven force on the piston, causing reset stagnation and abnormal gear shifting of the transmission.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In one aspect, a gearbox brake is provided, comprising:

[0007] Cylinder body;

[0008] A piston, one end of which is installed in the cylinder body and the other end of which is located outside the cylinder body, wherein a reset platform is provided on the end of the piston located outside the cylinder body;

[0009] An elastic member, one end of which is connected to the reset platform, and the other end of which is connected to the cylinder body.

[0010] Furthermore, the reset platform is arranged in the middle of the piston, the elastic member is a disc spring, one end of the disc spring is connected to the reset platform, and the other end is connected to the cylinder body through a positioning plate and a bolt.

[0011] Furthermore, the cross section of the resetting platform is trapezoidal.

[0012] Furthermore, one end of the piston provided with the reset platform is also provided with a friction platform, and a brake assembly is provided on the friction platform.

[0013] Furthermore, the reset platform is located in the middle of the piston, and the friction platforms are located at both ends of the reset platform.

[0014] Furthermore, one end of the reset platform is located inside the piston, and the other end is flush with the top of the friction platform.

[0015] Furthermore, the brake assembly includes a friction disc, a brake pad and a rotating member, the friction disc is connected to the rotating member via a spline, and a housing is provided on the brake pad.

[0016] Furthermore, a first mounting groove and a second mounting groove are provided on one end of the piston mounted in the cylinder body, and a first sealing ring and a second sealing ring are respectively provided in the first mounting groove and the second mounting groove.

[0017] Furthermore, an air inlet is provided on the cylinder body.

[0018] On the other hand, a vehicle is provided, comprising a vehicle body, on which the transmission brake as described above is mounted.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. By setting a reset platform on the piston and then radially installing an elastic member on the reset platform, the original arrangement of multiple sets of spiral springs is replaced, which solves the problem of uneven force on the piston, reset jamming, and abnormal gear shifting of the transmission due to differences in spring restoring force.

[0021] 2. The elastic member adopts disc spring, which takes advantage of the characteristics of disc spring, such as high stiffness, small layout space and long service life. It not only solves the sticking phenomenon when the piston is reset by multiple sets of spiral springs, but also meets the internal installation size requirements of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments 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.

[0023] Figure 1 It is a schematic diagram of the brake structure of the prior art;

[0024] Figure 2 A schematic diagram of a brake provided by the utility model;

[0025] Figure 3 A schematic diagram of the explosion of the brake provided by the utility model;

[0026] Figure 4 A schematic diagram of a piston provided by the utility model;

[0027] Among them: 1. cylinder body; 2. piston; 201. friction platform; 202. reset platform; 203. first mounting groove; 204. second mounting groove; 3. elastic member; 4. positioning plate; 5. bolt; 6. first sealing ring; 7. second sealing ring; 8. friction plate; 9. brake pad; 10. rotating member; 11. housing; 12. coil spring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invented product is usually placed when in use, it is only for the convenience of describing the present utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] The present embodiment is described in detail below with reference to the accompanying drawings.

[0035] like Figure 1 As shown, in the existing AT gearbox brake of the automobile, the piston 2 is connected to the friction plate 8 through multiple sets of coil springs 12, which are used to reset the piston 2 on the one hand and ensure smooth gear shifting on the other hand. However, during long-term use, due to the difference in assembly between each coil spring 12 and the phenomenon of spring relaxation of the coil spring 12 after long-term use, this will cause differences in the restoring force of each coil spring 12, making the piston 2 unevenly stressed, causing the piston 2 to be difficult to reset, not reset in place, and reset stuck, thereby causing problems in gearbox shifting and affecting driving safety. In order to solve the technical defects of the above-mentioned prior art, the inventor provides a gearbox brake and an automobile. According to the first aspect of this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, a gearbox brake is provided, comprising: a cylinder 1; a piston 2, one end of which is installed in the cylinder 1 and the other end is located outside the cylinder 1, wherein Figure 4 As shown, a first mounting groove 203 and a second mounting groove 204 are provided on one end of the piston 2 installed in the cylinder body 1, and a first sealing ring 6 and a second sealing ring 7 are respectively provided in the first mounting groove 203 and the second mounting groove 204. The first sealing ring 6 and the second sealing ring 7 are used to form a closed space between the piston 2 and the cylinder body 1 to ensure that the hydraulic oil does not leak; and a reset platform 202 is provided on one end of the piston 2 located outside the cylinder body 1. Figure 4It can be seen that the reset platform 202 is located in the middle of the piston 2, and the friction platform 201 is located at both ends of the reset platform 202. One end of the reset platform 202 is located inside the piston 2, and the other end is flush with the top of the friction platform 201. One end of the elastic member 3 is connected to the reset platform 202, and the other end is connected to the cylinder body 1. By setting the reset platform 202 on the piston 2, and then radially installing an elastic member 3 on the reset platform 202, the original arrangement of multiple groups of coil springs 12 is replaced, which solves the problem that the spring restoring force is different, causing the piston 2 to be unevenly stressed, reset stuck, and abnormal transmission shifting. In this embodiment, the elastic member 3 is preferably a disc spring. The disc spring is an annular structure with a through hole on the inside. The disc spring is used, and the characteristics of the disc spring, such as high stiffness, small required layout space and long service life, are utilized. It not only solves the jamming phenomenon that occurs when the piston 2 is reset by using multiple groups of coil springs 12, but also meets the internal installation size requirements of the transmission. Figure 2 and Figure 3 As shown, the cross section of the reset platform 202 is trapezoidal, one end of the disc spring is installed in the reset platform 202, and the other end is connected to the cylinder body 1 through the positioning plate 4 and the bolt 5; at the same time, a friction platform 201 is also provided on the end of the piston 2 provided with the reset platform 202, and the friction platform 201 is located on one side of the reset platform 202. Specifically, the inner plane of the piston 2 is set to a concave shape, the upper edge of the outer plane is provided with the friction platform 201, and the lower edge is provided with the reset platform 202, and a brake assembly is provided on the friction platform 201. The brake assembly includes a friction disc 8, a brake pad 9 and a rotating part 10. The friction disc 8 is connected to the rotating part 10 through a spline, and the brake pad 9 is provided with a housing 11. In specific use, as shown in FIG. Figure 2 and Figure 3 As shown, the friction platform 201 on the left side plane of the piston 2 is connected with the friction disc 8, the brake pad 9 and the rotating part 10 in sequence, wherein the brake pad 9 is fixed to the housing 11 by a spline, and the friction disc 8 is connected to the rotating part 10 by a spline. When the brake needs to start working, the hydraulic oil enters the closed space formed by the piston 2 and the cylinder body 1, pushing the piston 2 to move to the left, thereby pushing the friction disc 8 and the brake pad 9 to rub against each other, and the rotating part 10 is decelerated and locked. When the brake needs to stop working, the hydraulic oil is discharged from the closed space formed by the piston 2 and the cylinder body 1, and the piston 2 moves axially back to the initial position under the elastic force of the disc spring, the friction disc 8 and the brake pad 9 stop rubbing, and the rotating part 10 starts to rotate normally. Since the reset of the piston 2 relies solely on the elastic force of a single disc spring, the following problems are avoided. Figure 1 The combined effect of the multiple groups of springs shown avoids the problems of difficult resetting of the piston 2, inadequate resetting and resetting jam.

[0036] According to the second aspect of this embodiment, a car is provided, which includes a car body, and the transmission brake as described above is installed on the car body. Installing the above-mentioned transmission brake on the car body can ensure smooth gear shifting during driving of the car body and ensure the safety of vehicle driving.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gearbox brake, characterized in that: include: Cylinder body (1); A piston (2), one end of which is installed in the cylinder body (1) and the other end of which is located outside the cylinder body (1), wherein a reset platform (202) is provided on the end of the piston (2) located outside the cylinder body (1); An elastic member (3), one end of the elastic member (3) is connected to the resetting platform (202), and the other end is connected to the cylinder body (1).

2. The gearbox brake according to claim 1, characterized in that: The reset platform (202) is arranged in the middle of the piston (2); the elastic member (3) is a disc spring; one end of the disc spring is connected to the reset platform (202); and the other end is connected to the cylinder body (1) via a positioning plate (4) and a bolt (5).

3. The gearbox brake according to claim 1 or 2, characterized in that: The cross section of the resetting platform (202) is trapezoidal.

4. The gearbox brake according to claim 1 or 2, characterized in that: The piston (2) is provided with a friction platform (201) at one end thereof having a reset platform (202), and a brake assembly is provided on the friction platform (201).

5. The gearbox brake according to claim 4, characterized in that: The reset platform (202) is located in the middle of the piston (2), and the friction platforms (201) are located at both ends of the reset platform (202).

6. The gearbox brake according to claim 5, characterized in that: One end of the reset platform (202) is located inside the piston (2), and the other end is flush with the top of the friction platform (201).

7. The gearbox brake according to claim 4, characterized in that: The brake assembly comprises a friction disc (8), a brake pad (9) and a rotating member (10); the friction disc (8) is connected to the rotating member (10) via a spline, and a housing (11) is provided on the brake pad (9).

8. The gearbox brake according to claim 1, characterized in that: A first mounting groove (203) and a second mounting groove (204) are provided on one end of the piston (2) mounted in the cylinder body (1), and a first sealing ring (6) and a second sealing ring (7) are respectively provided in the first mounting groove (203) and the second mounting groove (204).

9. The gearbox brake according to claim 1, characterized in that: The cylinder body (1) is provided with an air inlet.

10. An automobile, comprising a vehicle body, characterized in that: The vehicle body is mounted with a transmission brake as described in any one of claims 1 to 9.

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