Variable speed operating valve

Abstract

The utility model belongs to the technical field of variable-speed operating valves, and particularly relates to a variable-speed operating valve which comprises a valve body, a control valve body assembly is installed on the rear portion of the upper portion of the valve body, a cut-off valve element is arranged below the control valve body assembly, and the rear end of the control valve body assembly is connected and matched with the cut-off valve element. A first operating valve element and a second operating valve element are inserted into the valve body in a penetrating mode, the lower portion of the first operating valve element and the lower portion of the second operating valve element are matched with a steel ball, a second spring is arranged on one side of the steel ball, and a second screw plug is arranged on one side of the second spring. By arranging the control valve body assembly, cutting-off of forward and reverse gears can be controlled, and sudden change of power transmission can be slowed down, so that impact on a gearbox is reduced, and the service life of the gearbox is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of speed change control valves, in particular to a speed change control valve. Background Art

[0002] The speed control valve is a special control valve used to operate and control the vehicle gearbox. One side of it is connected to the gearbox and the other side is connected to the vehicle's speed control lever. The gearbox's shifting operation is controlled by manipulating the valve body to ensure that the vehicle can change speed normally according to the driver's intention.

[0003] Patent No. CN202573811U discloses a speed shift lever, which can solve the defects of inconvenient operation and insufficiency caused by the direct connection between the lever and the engine, but cannot control the cutting off of the forward and reverse gears, which has a great impact on the gearbox and affects the service life of the reduction box.

[0004] Therefore, it is very necessary to develop a speed control valve that can control the cut-off of the forward and reverse gears. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a speed control valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a speed control valve, including a valve body, a control valve body assembly is installed at the upper rear of the valve body, a cut-off valve core is arranged below the control valve body assembly, and the rear end of the control valve body assembly is connected and cooperated with the cut-off valve core.

[0007] As an optimal technical solution of the utility model, a first operating valve core and a second operating valve core are interspersed inside the valve body, the first operating valve core and the second operating valve core are matched with steel balls below, a second spring is provided on one side of the steel ball, a second screw plug is provided on one side of the second spring, the second screw plug is fixedly connected to the valve body, the first operating valve core and the second operating valve core are clamped in the middle with a baffle, an oil seal is provided above the first operating valve core, the oil seal is matched and fixed with the valve body, a dust cover is provided above the oil seal, and the dust cover is fixed to the valve body with a retaining ring through a hole.

[0008] As an optimal technical solution of the utility model, a socketed plug is provided below the valve body, a combined gasket is provided between the valve body and the socketed plug, and a first spring is provided inside the valve body between the cut-off valve core and the socketed plug.

[0009] As a preferred technical solution of the utility model, a first screw plug is provided on the front end surface of the valve body, and the first screw plug has a sealing effect on the valve body.

[0010] As a preferred technical solution of the utility model, an O-ring is provided on the rear end face of the valve body.

[0011] Compared with the prior art, the utility model provides a speed control valve having the following beneficial effects:

[0012] The utility model can realize the control of cutting off the forward and reverse gears by setting the control valve body assembly, and can slow down the sudden change of power transmission, thereby reducing the impact on the gearbox and extending the service life of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A cross-sectional view of the AA line;

[0015] Figure 3 for Figure 1 A cross-sectional view of line BB;

[0016] Figure 4 The utility model is a three-dimensional Figure 1 ;

[0017] Figure 5 The utility model is a three-dimensional Figure 2 .

[0018] In the figure: 1. valve body; 2. control valve body assembly; 3. retaining ring for hole; 4. oil seal; 5. retaining plate; 6. first screw plug; 7. cut-off valve core; 8. O-ring; 9. first spring; 10. combination gasket; 11. plug with thread socket; 12. second screw plug; 13. second spring; 14. steel ball; 15. first control valve core; 16. second control valve core; 17. dust cover. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] See also Figure 1-5The utility model provides the following technical solutions: a speed control valve, including a valve body 1, a control valve body assembly 2 is installed at the upper rear of the valve body 1, a cut-off valve core 7 is arranged below the control valve body assembly 2, and the rear end of the control valve body assembly 2 is connected and matched with the cut-off valve core 7.

[0022] In this implementation scheme, the utility model has a reasonable structural design and is easy to use. It can facilitate the pressure oil to enter the gearbox, thereby facilitating the operation of the gearbox. The device is made of HT250 as a whole, the valve core is made of 45# steel, and the spring is 60si2Mn.

[0023] Specifically, the interior of the valve body 1 is interspersed with a first operating valve core 15 and a second operating valve core 16, and the first operating valve core 15 and the second operating valve core 16 are matched with a steel ball 14 below, a second spring 13 is provided on one side of the steel ball 14, a second screw plug 12 is provided on one side of the second spring 13, the second screw plug 12 is fixedly connected to the valve body 1, the middle of the first operating valve core 15 and the second operating valve core 16 are clamped by a baffle 5, an oil seal 4 is provided above the first operating valve core 15, the oil seal 4 is matched and fixed with the valve body 1, a dust cover 17 is provided above the oil seal 4, and the dust cover 17 is fixed to the valve body 1 with a hole retaining ring 3.

[0024] In this embodiment, the dust cover 17 can better prevent dust from entering.

[0025] Specifically, a socketed plug 11 is provided below the valve body 1 , a combined gasket 10 is provided between the valve body 1 and the socketed plug 11 , and a first spring 9 is provided inside the valve body 1 between the cut-off valve core 7 and the socketed plug 11 .

[0026] Specifically, a first screw plug 6 is provided on the front end surface of the valve body 1 , and the first screw plug 6 seals the valve body 1 .

[0027] Specifically, an O-ring 8 is provided on the rear end surface of the valve body 1 .

[0028] The working principle and use process of the utility model are as follows: when the device is used, one side of the speed control valve is connected to the gearbox, and the other side of the speed control valve is connected to the vehicle gear control lever for operating the valve body to control the gearbox. The working pressure of the oil inlet P is adjusted to 1.0-1.2Mpa. When the first control valve core 15 and the second control valve core 16 are pulled, oil is supplied to the forward 1st gear position. When the first control valve core 15 and the second control valve core 16 are pushed, oil is supplied to the forward 2nd gear position. When the first control valve core 15 and the second control valve core 16 are pushed, oil is supplied to the reverse 1st gear position. When the first control valve core 15 and the second control valve core 16 are pushed, oil is supplied to the reverse 2nd gear position, thereby realizing gear switching, controlling the action of the valve body assembly, and controlling the downward movement of the cut-off valve core to realize the on-off of the gear.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. 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 speed control valve, comprising a valve body (1), characterized in that: A control valve body assembly (2) is installed at the rear portion above the valve body (1), a cut-off valve core (7) is arranged below the control valve body assembly (2), and the rear end of the control valve body assembly (2) is connected and matched with the cut-off valve core (7).

2. A speed control valve according to claim 1, characterized in that: A first operating valve core (15) and a second operating valve core (16) are inserted into the interior of the valve body (1). The first operating valve core (15) and the second operating valve core (16) are matched with a steel ball (14) below. A second spring (13) is provided on one side of the steel ball (14). A second screw plug (12) is provided on one side of the second spring (13). The second screw plug (12) is fixedly connected to the valve body (1). The middle parts of the first operating valve core (15) and the second operating valve core (16) are clamped by a baffle (5). An oil seal (4) is provided above the first operating valve core (15). The oil seal (4) is matched and fixed with the valve body (1). A dust cover (17) is provided above the oil seal (4). The dust cover (17) is fixed to the valve body (1) by a hole baffle (3).

3. A speed control valve according to claim 2, characterized in that: A socket-thread plug (11) is arranged below the valve body (1), a combined gasket (10) is arranged between the valve body (1) and the socket-thread plug (11), and a first spring (9) is arranged inside the valve body (1) between the cut-off valve core (7) and the socket-thread plug (11).

4. A speed control valve according to claim 3, characterized in that: The front end surface of the valve body (1) is provided with a first screw plug (6), and the first screw plug (6) has a sealing effect on the valve body (1).

5. A speed control valve according to claim 4, characterized in that: The rear end surface of the valve body (1) is provided with an O-ring (8).

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