Brake device and tractor

Abstract

The utility model provides a brake device and a tractor. Comprising a main brake device, a pneumatic brake device and a linkage mechanism, the main braking device controls braking of the tractor, the air braking device controls braking of hitching equipment of the tractor, one end of the linkage mechanism is connected with the main braking device, the other end of the linkage mechanism is connected with the air braking device, and therefore synchronous work of the main braking device and the air braking device is achieved. A connecting rod structure of an existing main braking device and an existing pneumatic device is designed into a track groove structure, the braking stroke of a driving device can be guaranteed, the braking stroke of a pneumatic braking device can also be considered, and the braking effect and safety of the tractor are improved.

Description

Technical Field

[0001] The utility model relates to the field of tractor braking, in particular to a braking device and a tractor. Background Art

[0002] Tractors are generally equipped with main brakes and pneumatic brakes. The main brakes can be mechanical brakes, hydraulic brakes or electronically controlled brakes, etc., for braking the tractor. Pneumatic brakes use single-circuit or dual-circuit brake systems, which are used for braking tractor-mounted equipment. The linkage between the main brakes and pneumatic brakes of mainstream tractors on the market generally uses a pin-hole connecting rod mechanism, such as the attached Figures 1 to 2 As shown, this design has no problem when the vehicle is moving at a low speed, but at high speed, the main brake requires a larger stroke. At this time, due to the limitation of the pneumatic brake device, the main brake device cannot provide sufficient stroke, which will cause the main brake device to fail to stop, posing a huge driving safety hazard.

[0003] Therefore, it is necessary to provide a brake device and a tractor to overcome the above-mentioned defectives. Utility Model Content

[0004] The purpose of the utility model is to provide a braking device.

[0005] According to one aspect of the utility model, a braking device is provided, comprising:

[0006] The main brake device controls the tractor's brakes;

[0007] Air brakes, which control the brakes of the tractor's hitch;

[0008] A linkage mechanism, one end of which is connected to the main brake device, and the other end of which is connected to the air brake device, so that the main brake device and the air brake device can work synchronously;

[0009] The linkage mechanism comprises:

[0010] A first rotating arm, the first rotating arm comprises a first connecting arm and a first output arm rotating integrally with the first connecting arm, the first connecting arm and the main brake device keep synchronous movement, and a slide groove is further provided on the first output arm;

[0011] A second rotating arm, the second rotating arm comprises a second connecting arm and a second output arm rotating integrally with the second connecting arm, the second connecting arm is slidably mounted in the slide slot through a connecting member; the second output arm is connected to the air brake device to control the opening and closing of the air brake device;

[0012] Wherein, under the action of the first rotating arm, the second rotating arm rotates along its rotating point by a predetermined angle until the air brake device is turned on, and then maintains relative sliding with the first rotating arm.

[0013] Preferably, the chute comprises:

[0014] The main chute is configured as an arc-shaped structure with the first rotating arm rotation point as the center;

[0015] The secondary slide groove is configured as a straight line structure extending along one end of the main slide groove toward one side of the second rotating arm.

[0016] Preferably, the connecting member is a roller needle bearing installed in the slide groove.

[0017] Preferably, the first connecting arm is connected to the main brake device via a pull rod.

[0018] Preferably, a locking nut is provided at the other end of the second rotating arm.

[0019] Preferably, the air brake device comprises:

[0020] Push-type switch, when the locking nut presses the push-type switch, the air brake device maintains the braking state; when the locking nut is separated from the push-type switch, the air brake device disconnects the braking state.

[0021] Preferably, the push-type switch is an air brake valve assembly.

[0022] Preferably, the first swing arm is mounted on the tractor via a first bracket; and the second swing arm is mounted on the air brake device via a second bracket.

[0023] Preferably, the main brake device comprises:

[0024] a brake pedal, the brake pedal inputting a brake signal;

[0025] An actuator is connected to the brake pedal in transmission, and its braking effect is positively correlated with the braking stroke of the brake pedal.

[0026] According to another aspect of the utility model, a tractor is provided, comprising the braking device.

[0027] Compared with the prior art, the braking device provided by the utility model has the following beneficial effects:

[0028] The existing connecting rod structure of the main brake device and the pneumatic device is designed as a track groove structure, which can not only ensure the braking stroke of the active device, but also take into account the braking stroke of the pneumatic brake device, thereby improving the braking effect and safety of the tractor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0030] Figure 1 It is a structural schematic diagram of an existing braking device in a non-braking state.

[0031] Figure 2 The present invention is a structural schematic diagram of an existing braking device when the air brake device is in a maximum braking state.

[0032] Figure 3 It is a structural schematic diagram of the braking device in the utility model in a non-braking state.

[0033] Figure 4 It is a partial enlarged view of the linkage mechanism in the utility model in a non-braking state.

[0034] Figure 5 It is a structural schematic diagram of the braking device in the utility model when the air brake device is in the maximum braking state.

[0035] Figure 6 It is a structural schematic diagram of the braking device in the utility model when the main braking device is in the maximum braking state.

[0036] Explanation of the accompanying drawings: 1. main braking device; 11. brake pedal; 12. pull rod; 2. air brake device; 21. push switch; 3. linkage mechanism; 31. first rotating arm; 311. first connecting arm; 312. first output arm; 313. slide groove; 313a. main slide groove; 313b. auxiliary slide groove; 32. second rotating arm; 321. second connecting arm; 322. second output arm; 323. connecting piece; 33. locking nut; 34. first bracket; 35. second bracket. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0039] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0040] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 this utility model can be understood according to specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0043] See attached Figures 3 to 6 The present embodiment provides a braking device, which is mainly installed on a tractor to achieve braking of the tractor and a hooked device connected to the rear end of the tractor, the hooked device can be a trailer, an agricultural implement or other device. The braking device includes a main braking device 1, an air braking device 2 and a linkage mechanism 3.

[0044] The main brake device 1 includes a brake pedal 11, an actuator (not shown in the drawings) connected to the brake pedal 11, and the brake element can be a mechanical brake mechanism, an electric control brake mechanism, and a hydraulic brake mechanism. The brake signal is input through the brake pedal 11 to control the brake element to brake the tractor. Regardless of the braking method adopted by the actuator, its braking effect is positively correlated with the braking stroke of the brake pedal 11, that is, the greater the braking stroke of the brake pedal 11, the better the corresponding braking effect of the main brake device 1.

[0045] The air brake device 2 is connected to the hitch through the air circuit to control the brake of the tractor hitch. The air brake device 2 is controlled by the push switch 21. In this embodiment, the push switch 21 is embodied as an air brake valve assembly, and the transmission of the braking effect is achieved by the on and off of the air circuit. The push switch 21 is built with an elastic member. In the non-braking state, the push switch 21 naturally pops open, and the air brake device 2 is in the off state; when the push switch 21 is pressed, the air brake device 2 enters the braking state, and with the full pressing of the push switch 21, the maximum braking effect of the air brake device 2 is achieved.

[0046] One end of the linkage mechanism 3 is connected to the main brake device 1, and the other end of the linkage mechanism 3 is connected to the air brake device 2, so as to realize the synchronous operation of the main brake device 1 and the air brake device 2. Preferably, the braking effect of the air brake device 2 is better than that of the main brake device 1, so as to avoid insufficient braking of the rear-side hitch device, which, under the action of inertia, collides with the tractor at the front side, thus forming a safety hazard.

[0047] See attached Figure 4 The linkage mechanism 3 includes: a first rotating arm 31 and a second rotating arm 32; the first rotating arm 31 is installed on the tractor through a first bracket 34; the second rotating arm 32 is installed on the air brake device 2 through a second bracket 35. The first rotating arm 31 includes a first connecting arm 311 and a first output arm 312 that rotates integrally with the first connecting arm 311. The first connecting arm 311 is connected to the main brake device 1 through a pull rod 12 to achieve synchronous movement of the first connecting arm 311 and the main brake device 1. A slide groove 313 is also provided on the first output arm 312; the second rotating arm 32 includes a second connecting arm 321 and a second output arm 322 that rotates integrally with the second connecting arm 321. The second connecting arm 321 is slidably installed in the slide groove 313 through a connecting piece 323; a locking nut 33 is provided at the other end of the second output arm 322, which is connected to the air brake device 2 to control the opening and closing of the air brake device 2; when the locking nut 33 presses the push switch 21, the air brake device 2 maintains the braking state; when the locking nut 33 is separated from the push switch 21, the air brake device 2 is disconnected from the braking state.

[0048] The maximum braking stroke of the air brake device 2 is smaller than the maximum braking stroke of the main brake device 1. Therefore, the slide groove 313 includes a main slide groove 313a and a secondary slide groove 313b. The main slide groove 313a is configured as an arc structure with the rotation point of the first rotating arm 31 as the center, and the secondary slide groove 313b is configured as a straight line structure extending from one end of the main slide groove 313a to the side of the second rotating arm 32. The connecting member 323 is a roller needle bearing installed in the slide groove 313, and the roller needle bearing always abuts against the outer edge of the slide groove 313 and slides along the outer side of the slide groove 313. See the attached Figure 3 , 56. When the connecting member 323 is in the sliding stage of the secondary slide groove 313b, the second rotating arm 32 is rotated by a predetermined angle along its rotation point under the action of the first rotating arm 31 to open the air brake device 2. When the air brake device 2 reaches the maximum braking state, the connecting member 323 also enters the main slide groove 313a stage, and the second rotating arm 32 slides relative to the first rotating arm 31. The locking nut 33 keeps pressing the push switch 21, and the air brake device 2 is also in the maximum braking state. The first rotating arm 31 can still rotate freely along the rotation point to realize braking of the main brake device 1 until the main brake device 1 also reaches the maximum braking state.

[0049] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A braking device, characterized in that: include: The main brake device controls the tractor's brakes; Air brakes, which control the brakes of the tractor's hitch; A linkage mechanism, one end of which is connected to the main brake device, and the other end of which is connected to the air brake device, so that the main brake device and the air brake device can work synchronously; The linkage mechanism comprises: A first rotating arm, the first rotating arm comprises a first connecting arm and a first output arm rotating integrally with the first connecting arm, the first connecting arm and the main brake device keep synchronous movement, and a slide groove is further provided on the first output arm; A second rotating arm, the second rotating arm comprises a second connecting arm and a second output arm rotating integrally with the second connecting arm, the second connecting arm is slidably mounted in the slide slot through a connecting member; the second output arm is connected to the air brake device to control the opening and closing of the air brake device; Wherein, under the action of the first rotating arm, the second rotating arm rotates along its rotating point by a predetermined angle until the air brake device is turned on, and then maintains relative sliding with the first rotating arm.

2. The braking device according to claim 1, characterized in that The chute comprises: The main chute is configured as an arc-shaped structure with the first rotating arm rotation point as the center; The secondary slide groove is configured as a straight line structure extending along one end of the main slide groove toward one side of the second rotating arm.

3. The braking device according to claim 2, characterized in that: The connecting member is a roller needle bearing installed in the slide groove.

4. The braking device according to claim 1, characterized in that: The main brake device comprises: a brake pedal, the brake pedal inputting a brake signal; An actuator is connected to the brake pedal in transmission, and its braking effect is positively correlated with the braking stroke of the brake pedal.

5. The braking device according to claim 4, characterized in that: The first connecting arm is connected to the brake pedal through a pull rod.

6. The braking device according to claim 1, characterized in that: The other end of the second rotating arm is provided with a locking nut.

7. The braking device according to claim 6, characterized in that The air brake device comprises: Push-type switch, when the locking nut presses the push-type switch, the air brake device maintains the braking state; when the locking nut is separated from the push-type switch, the air brake device disconnects the braking state.

8. The braking device according to claim 7, characterized in that: The push-type switch is an air brake valve assembly.

9. The braking device according to claim 8, characterized in that: The first rotating arm is installed on the tractor through a first bracket; the second rotating arm is installed on the air brake device through a second bracket.

10. A tractor, characterized in that: A braking device comprising any one of claims 1 to 9.

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