Neutral gear detection device and tractor

Abstract

The utility model provides a neutral gear detection device and a tractor. The neutral gear detection device comprises a first connecting part, a sleeve part, a baffle part and a neutral gear detection switch, wherein the first connecting part and the gear shifting operation rod keep synchronous action; the sleeve part is fixedly connected with the first connecting part and is rotationally mounted on the rotating shaft; the baffle part is fixedly connected with the sleeve part and keeps rotating integrally with the first connecting part; the neutral gear detection switch is used for opening or closing the neutral gear detection circuit, the neutral gear detection switch is provided with a contact type contact, and the contact is located on the motion trail of the baffle plate part; when the gear shifting operation rod is in a neutral gear state, the baffle part and the contact are in a disengaged state; when the gear shifting operation rod is located at the forward gear or the reverse gear, the baffle part rotates to make contact with the contact. The whole device is simple in design, convenient to install and adjust, high in error-tolerant rate and capable of improving the assembling efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a neutral gear detection device and a tractor. Background Art

[0002] Due to the characteristics of tractors with multiple gears and multiple slide bar gearboxes, it is difficult to install a neutral gear detection device. Currently, neutral gear detection devices are rarely used in the tractor field. Some National IV tractor products have added a parking regeneration function. During parking regeneration, it is necessary to detect whether the tractor is in neutral or not moving. Moreover, the gear-engaging structure of existing tractors is mechanical, and the moving parts of the mechanical structure have errors during installation and movement, which makes it difficult for general neutral gear detection devices to meet the needs.

[0003] After searching, Patent Document 1 (Chinese invention application, publication number CN 111173929 A) discloses a tractor neutral gear position detection device, including a neutral gear detection switch, a movable body, a neutral gear push rod, an interlocking pin and a gear slide rod. When the gear slide rod moves axially to engage the gear, the movable body leaves the neutral gear groove and is directly lifted up or indirectly lifted up through the force transmission of the interlocking pin and the neutral gear push rod, thereby triggering the neutral gear detection switch to identify the non-neutral gear position. However, the neutral gear position detection device in Patent Document 1 has the following problems: first, the structure of the device is relatively complex and the reliability is relatively poor; second, the device is set at the gearbox end, which is not convenient for installation and debugging and modification and design of existing products.

[0004] Therefore, it is necessary to provide a neutral gear detection device to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to provide a neutral gear detection device and a tractor.

[0006] According to one aspect of the utility model, a neutral detection device is provided, comprising: a first connecting part, a sleeve part, a baffle part and a neutral detection switch; the first connecting part and the shift operating lever maintain synchronous action; the sleeve part is fixedly connected to the first connecting part and is rotatably mounted on the rotating shaft; the baffle part is fixedly connected to the sleeve part and rotates integrally with the first connecting part; the neutral detection switch is used to disconnect or close the neutral detection circuit, the neutral detection switch has a contact contact, and the contact is located on the movement trajectory of the baffle part; when the shift operating lever is in a neutral state, the baffle part and the contact are in a disengaged state; when the shift operating lever is in a forward gear or a reverse gear, the baffle part rotates to contact with the contact.

[0007] Preferably, the neutral detection switch is a normally closed switch; when the baffle portion is disengaged from the contact, the neutral detection switch is in a closed state; when the baffle portion rotates to contact the contact, the neutral detection switch is triggered to open.

[0008] Preferably, the baffle portion comprises: a main body portion and a notch portion; the main body portion has a fan-shaped structure with the rocker arm rotation point as the center; the notch portion is arranged at the outer edge of the main body portion, and the depth of the notch portion is at least greater than the effective stroke of the contact.

[0009] Preferably, the distance between the inner edge of the notch portion and the neutral detection switch is at least 1 mm.

[0010] Preferably, the neutral detection switch is arranged in a cab hood.

[0011] Preferably, a hanging bracket is arranged in the cab hood; the neutral detection switch is mounted on the hanging bracket via a first bracket, and the rotating shaft is mounted on the hanging bracket via a second bracket.

[0012] Preferably, a first waist-shaped hole in the horizontal direction is opened at the lower part of the first bracket, and the first bracket is fixedly installed on the hanging bracket. A second waist-shaped hole in the vertical direction is opened at the upper part of the first bracket, and the neutral detection switch is fixedly installed on the first bracket.

[0013] Preferably, a first output portion is also fixedly mounted on the sleeve portion, and a transmission connection is achieved between the first output portion and the shift actuator via a mechanical structure.

[0014] Preferably, the shift actuator end is provided with a second rocker arm, and the second rocker arm is connected to the first output portion via a cable structure.

[0015] According to another aspect of the utility model, a tractor is provided, comprising the neutral gear detection device.

[0016] Compared with the prior art, the neutral gear detection device provided by the utility model has the following beneficial effects:

[0017] The utility model integrates the baffle part on the shuttle gear rocker arm of the shift operating lever, and cooperates with the normally closed neutral gear detection switch. When the shift operating lever is in the forward gear and reverse gear position, the neutral gear detection switch is triggered to be disconnected, and when in the neutral gear state, the neutral gear detection switch is in a closed state, thereby realizing the detection of the neutral gear state of the tractor. Moreover, the design of the entire device is simple, easy to install and adjust, with high fault tolerance, which can improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 This is one of the structural schematic diagrams of the neutral gear detection device in the utility model.

[0020] Figure 2 It is a partial enlarged view of the first cantilever in the utility model.

[0021] Figure 3 This is the second structural schematic diagram of the neutral position detection device in the utility model.

[0022] Explanation of the accompanying drawings: 1. Hanging bracket; 11. First bracket; 111. First waist-shaped hole; 112. Second waist-shaped hole; 12. Second bracket; 13. Rotating shaft; 2. Neutral detection switch; 21. Contact; 22. Fastening nut; 3. First rocker arm; 31. First connecting part; 32. First output part; 33. Baffle part; 331. Main body; 332. Notch part; 34. Sleeve part; 4. Wire drawing structure; 5. Second rocker arm; 51. Second connecting part; 52. Second output part; 6. Gearbox. DETAILED DESCRIPTION

[0023] 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.

[0024] 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".

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] See also Figures 1 to 3 This embodiment provides a neutral gear detection device, which is mainly used in tractors and is arranged in a cab hood, which is easy to install and adjust, and does not require structural adaptability design of the tractor's gearbox 6. The neutral gear detection device includes: a first rocker arm 3 and a neutral gear detection switch 2.

[0030] The first rocker arm 3 includes: a first connecting portion 31, a sleeve portion 34 and a baffle portion 33. The first connecting portion 31 is connected to the shift operating lever and maintains synchronous movement. The sleeve portion 34 is fixedly connected to the first connecting portion 31 and is rotatably installed on the rotating shaft 13. The baffle portion 33 is fixedly connected to the sleeve portion 34 and rotates integrally with the first connecting portion 31.

[0031] See attached Figure 2 The baffle portion 33 includes a main body 331 and a notch portion 332; the main body 331 has a fan-shaped structure with the rocker arm rotation point as the center; the notch portion 332 is arranged at the outer edge of the main body 331, and the depth of the notch portion 332 is at least greater than the effective stroke of the neutral detection switch 2. Preferably, the distance between the inner edge of the notch portion 332 and the neutral detection switch 2 is at least 1 mm, leaving enough installation error.

[0032] The neutral detection switch 2 is a normally closed switch, which is connected in series in the neutral detection circuit, and is used to open or close the neutral detection circuit to determine whether the tractor is in a neutral state. In addition, the neutral detection switch 2 has a contact point 21, and the contact point 21 is located on the movement track of the baffle portion 33.

[0033] When the shift lever is in the neutral state, the contact 21 is just located in the notch portion 332, the baffle portion 33 and the contact 21 are in a disengaged state, and the neutral detection switch 2 is in a closed state; when the shift lever is in the forward gear or reverse gear position, the baffle portion 33 rotates to contact the contact 21, and the contact 21 is pressed by the main body portion 331, triggering the neutral detection switch 2 to disconnect.

[0034] Of course, for those skilled in the art, the neutral detection switch 2 is not limited to a normally closed switch, but can also be a normally open switch, and adaptive adjustments can be made to the control logic of the neutral detection circuit, which will not be described in detail here.

[0035] The neutral gear detection switch 2 is arranged in the cab hood, which is convenient for installation and adjustment of the neutral gear detection device. Specifically, a hanging bracket is arranged in the cab hood, the neutral gear detection switch 2 is installed on the hanging bracket 1 through the first bracket 11, and the rotating shaft 13 is installed on the hanging bracket through the second bracket 12.

[0036] Since there are errors in the installation and movement of the moving parts of the mechanical structure, in order to overcome the above problems, in this embodiment, a first waist-shaped hole 111 in the horizontal direction is opened at the lower part of the first bracket 11, and the first bracket 11 is fixedly installed on the hanging bracket 1 by bolts, and a second waist-shaped hole 112 in the vertical direction is opened at the upper part of the first bracket 11, and the neutral detection switch 2 is fixedly installed on the first bracket 11 by bolts. Therefore, the fixed position of the neutral detection switch 2 can be adjusted in the left and right directions and the up and down directions, and the neutral detection switch 2 body is equipped with an adjustment fastening nut 22, which can adjust the relative front and rear positions of the switch.

[0037] The first output part 32 is also fixedly mounted on the sleeve part 34, and the first output part 32 is connected to the shift actuator through a mechanical structure. Specifically, a second rocker arm 5 is provided on the gearbox 6, and the second arm includes a second connection part 51 and a second output part 52 that rotates integrally with the second connection part 51. The second connection part 51 is connected to the first output part 32 through a cable, and the second output part 52 is connected to the shift actuator of the gearbox 6. The first rocker arm 3 is driven to rotate by the shift operating lever, and then the second rocker arm 5 is driven to rotate by the cable structure 4, so as to control the shift actuator of the gearbox 6.

[0038] 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 neutral gear detection device, characterized in that: include: a first connection portion, wherein the first connection portion and the shift operating lever maintain synchronous movement; a sleeve portion, the sleeve portion being fixedly connected to the first connecting portion and rotatably mounted on the rotating shaft; a baffle portion, the baffle portion being fixedly connected to the sleeve portion and rotating integrally with the first connecting portion; A neutral detection switch, the neutral detection switch is used to open or close a neutral detection circuit, the neutral detection switch has a contact point, and the contact point is located on the movement track of the baffle portion; When the shift operating lever is in a neutral state, the baffle portion is in a disengaged state from the contact point; when the shift operating lever is in a forward gear or a reverse gear, the baffle portion rotates to contact the contact point.

2. The neutral gear detection device according to claim 1, characterized in that: The neutral detection switch is a normally closed switch; When the baffle portion is disengaged from the contact, the neutral gear detection switch is in a closed state; when the baffle portion rotates to contact the contact, the neutral gear detection switch is triggered to be disconnected.

3. The neutral gear detection device according to claim 1, characterized in that: The baffle portion comprises: A main body, wherein the main body has a fan-shaped structure with the rocker arm rotation point as the center; A notch portion is disposed at the outer edge of the main body portion, and a depth of the notch portion is at least greater than an effective stroke of the contact.

4. The neutral gear detection device according to claim 3, characterized in that: The distance between the inner edge of the notch portion and the contact point is at least 1 mm.

5. The neutral gear detection device according to claim 1, characterized in that: The neutral detection switch is arranged in the cab hood.

6. The neutral gear detection device according to claim 5, characterized in that: A hanging bracket is arranged inside the cab hood; The neutral detection switch is installed on the hanging bracket through the first bracket, and the rotating shaft is installed on the hanging bracket through the second bracket.

7. The neutral gear detection device according to claim 6, characterized in that: A first waist-shaped hole in the horizontal direction is opened at the lower part of the first bracket, and the first bracket is fixedly installed on the hanging bracket. A second waist-shaped hole in the vertical direction is opened at the upper part of the first bracket, and the neutral detection switch is fixedly installed on the first bracket.

8. The neutral gear detection device according to claim 1, characterized in that: A first output part is also fixedly mounted on the sleeve part, and a transmission connection is achieved between the first output part and the shift actuator through a mechanical structure.

9. The neutral gear detection device according to claim 8, characterized in that: The shift actuator end is provided with a second rocker arm, and the second rocker arm is connected to the first output portion via a cable structure.

10. A tractor, characterized in that: It comprises the neutral gear detection device as claimed in any one of claims 1 to 9.

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