Mechanical cruise control mechanism and tractor with same

Abstract

The utility model relates to the technical field of agricultural equipment, in particular to a mechanical constant-speed cruise mechanism and a tractor with the mechanical constant-speed cruise mechanism. The mechanical cruise control mechanism comprises an installation frame, an HST control rocker arm connecting piece and a self-locking operation assembly, the HST control rocker arm connecting piece is rotatably installed in the installation frame, connected with an HST control arm and rotates along with the HST control arm, and the self-locking operation assembly is installed in the installation frame and matched with the HST control rocker arm connecting piece. The locking device is used for locking or unlocking the HST control rocker arm connecting piece. The self-locking mechanism has the advantages of being simple and reasonable in structural design, capable of achieving a mechanically-controlled HST cruise control function through matching of the self-locking operation assembly and the HST control rocker arm connecting piece, and simple and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery and equipment, in particular to a mechanical cruise control mechanism and a tractor with the same. Background Art

[0002] During the operation of the tractor, the driving speed of the tractor generally remains stable. Among the existing HST tractors, the operation modes of the HST are mainly divided into two types: electronic control and mechanical control. The electronic control HST can realize the cruise control function by writing the electronic control program; however, the mechanical control HST can only realize the forward and backward movement of the vehicle by stepping on the pedal, and does not have the cruise control function for the time being.

[0003] Based on this, a mechanical cruise control mechanism for mechanically operated tractors equipped with mechanically operated HST tractors needs to be developed. By manipulating the cruise control lever, the cruise control ratchet and ratchet wheel are engaged to achieve the fixed speed function, thereby freeing the driver's feet, reducing the driver's driving fatigue, and improving driving comfort. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a mechanical cruise control mechanism and a tractor with the same, which effectively overcomes the defects of the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A mechanical cruise control mechanism comprises a mounting frame, an HST operating rocker arm connecting piece and a self-locking operating component. The HST operating rocker arm connecting piece is rotatably mounted in the mounting frame and connected to the HST operating arm. As the HST operating arm rotates, the self-locking operating component is mounted in the mounting frame and adapted to the HST operating rocker arm connecting piece for locking or unlocking the HST operating rocker arm connecting piece.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the mounting frame includes two parallel mounting plates, a first rotating shaft is vertically connected between one ends of the two mounting plates, and the HST operating rocker arm connecting piece has a first shaft sleeve, which is coaxially sleeved on the first rotating shaft.

[0009] Furthermore, the HST operating rocker arm connecting piece is a fan-shaped incomplete ratchet, and a continuous tooth groove is provided on its arc edge. The end of the HST operating rocker arm connecting piece corresponding to the center of the circle is vertically penetrated by the first shaft sleeve. The self-locking operating component includes an operating plate, and the operating plate is rotatably assembled between the other ends of the two mounting frames. A ratchet matching the incomplete ratchet is provided on the upper part of one end of the operating plate close to the HST operating rocker arm connecting piece. The operating plate is movably connected to an operating lever, and the operating lever is used to drive the operating plate to flip upward under the action of external force and engage the ratchet with the tooth groove, or flip downward to separate the ratchet from the tooth groove.

[0010] Furthermore, a second rotating shaft is vertically connected between the other ends of the two mounting plates, and a second shaft sleeve is vertically passed through one end of the operating plate, and the second shaft sleeve is coaxially sleeved on the second rotating shaft.

[0011] Furthermore, a connecting portion is provided at the upper portion of one end of the HST operating rocker arm connecting piece corresponding to the center of the circle, and the connecting portion is movably connected to the HST operating arm. The HST operating arm is used to drive the connecting portion to drive the HST operating rocker arm connecting piece to rotate up and down around the first rotating shaft.

[0012] Furthermore, it also includes a brake link, and the above-mentioned operating panel is provided with an arc-shaped guide hole coaxially distributed with its rotation trajectory. One end of the above-mentioned brake link passes through the above-mentioned guide hole through a pin shaft arranged vertically therewith, and the other end of the above-mentioned brake link is connected to a clutch pedal. When the above-mentioned clutch pedal is stepped on, the above-mentioned brake link and the pin shaft are driven to push the above-mentioned operating panel to flip downward and separate the above-mentioned ratchet from the tooth groove.

[0013] Furthermore, the joystick extends vertically, and a connecting rod is vertically provided at the lower end thereof, and the connecting rod vertically penetrates the operating panel.

[0014] Furthermore, an elastic pulling member is connected between any one of the mounting plates and the operating plate.

[0015] Furthermore, the elastic pulling member is a spring, and spring mounting points are respectively provided on the outer side of the mounting plate and on the same side of the operating plate, and both ends of the spring are respectively connected to the two spring mounting points.

[0016] The utility model has the following beneficial effects: the structural design is simple and reasonable, the cruise control function of the mechanically controlled HST can be realized through the cooperation of the self-locking operating component and the HST operating rocker arm connecting piece, and the operation is relatively simple and convenient.

[0017] A tractor is also provided, comprising a mechanical cruise control mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a top view of the structure of the mechanical cruise control mechanism of the utility model;

[0019] Figure 2 It is a structural side view of the mechanical cruise control mechanism of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the mechanical cruise control mechanism of the utility model under cruise control after removing one side of the mounting plate;

[0021] Figure 4 The schematic diagram is a structural diagram of the mechanical cruise control mechanism of the utility model in a non-cruise state after removing one side mounting plate.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Mounting frame; 2. HST operating rocker arm connector; 3. Operating panel; 4. Operating lever; 5. Brake connecting rod; 6. Elastic pulling member; 7. Spring mounting point; 11. Mounting plate; 21. First bushing; 22. Connecting part; 31. Ratchet; 32. Second bushing; 33. Guide hole; 41. Connecting rod. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] Example 1

[0026] like Figure 1 , 2 As shown in Figures 3 and 4, the mechanical cruise control mechanism of this embodiment includes a mounting frame 1, an HST operating rocker arm connecting member 2 and a self-locking operating component. The HST operating rocker arm connecting member 2 is rotatably mounted in the mounting frame 1 and connected to the HST operating arm. As the HST operating arm rotates, the self-locking operating component is mounted in the mounting frame 1 and adapted to the HST operating rocker arm connecting member 2 for locking or unlocking the HST operating rocker arm connecting member 2.

[0027] The mechanical cruise control mechanism of this embodiment has the following two states when used with a vehicle:

[0028] 1) Cruise control: The end connected to the HST control rocker arm pulls the HST control rocker arm connector 2 to rotate counterclockwise. When the speed the driver wants to keep constant speed is reached, the self-locking operating component is operated to self-lock the HST control rocker arm connector 2 and maintain the self-locking state.

[0029] 2) Release the cruise control: operate the self-locking operating component to contact the locking state of the HST control rocker arm connector 2 to release the cruise control.

[0030] The overall structural design is simple and reasonable, and the cruise control function of the mechanically controlled HST can be realized through the cooperation of the self-locking operating component and the HST control rocker arm connector, which is relatively simple and convenient to operate.

[0031] As a preferred embodiment, the mounting frame 1 comprises two parallel mounting plates 11, a first rotating shaft is vertically connected between one ends of the two mounting plates 11, and the HST operating rocker arm connector 2 has a first shaft sleeve 21, which is coaxially sleeved on the first rotating shaft.

[0032] In the above implementation scheme, the mounting frame 1 as a whole adopts a structure in which the first rotating shaft is connected between two mounting plates 11, and the structure is relatively simple. At the same time, the rotation assembly of the HST operating rocker arm connecting member 2 is also relatively simple and quick.

[0033] As a preferred embodiment, the HST operating rocker arm connecting member 2 is a fan-shaped incomplete ratchet, and a continuous tooth groove is provided on its arc edge. The end of the HST operating rocker arm connecting member 2 corresponding to the center of the circle is vertically penetrated by the first shaft sleeve 21. The self-locking operating component includes an operating plate 3, and the operating plate 3 is rotatably assembled between the other ends of the two mounting frames 1. The upper part of the end of the operating plate 3 close to the HST operating rocker arm connecting member 2 is provided with a ratchet 31 adapted to the incomplete ratchet. The operating plate 3 is movably connected to the operating lever 4, and the operating lever 4 is used to drive the operating plate 3 to flip upward under the action of external force and engage the ratchet 31 with the tooth groove, or flip downward to separate the ratchet 31 from the tooth groove.

[0034] In the above implementation scheme, the HST operating rocker arm connecting member 2 adopts a part of a complete circular ratchet (fan-shaped), and the outer edge is the tooth groove of the ratchet. When one end of the HST operating rocker arm connection is pulled (when operating forward), the HST operating rocker arm connecting member 2 rotates counterclockwise. When the speed that the driver wants to keep constant speed is reached, the joystick 4 is pulled up, and the operating panel 3 is pulled up to flip upward (flip counterclockwise), so that the ratchet 31 rotates counterclockwise and engages with the tooth groove on the outer edge of the incomplete ratchet, thereby realizing the cruise control function.

[0035] It should be noted that: considering that the demand for cruise control during the forward movement of the tractor is much greater than that during the backward movement, the cruise control function is only designed for the forward movement, and no cruise control is set for the backward movement. Specifically, after the foot pedal is stepped on, the HST operating rocker arm pulls the HST operating rocker arm connector 2 to rotate counterclockwise, and then the operating panel 3 is turned upward to realize the self-locking of the HST operating rocker arm connector 2, thereby realizing the cruise control function during the forward movement.

[0036] As a preferred embodiment, a second rotating shaft is vertically connected between the other ends of the two mounting plates 11, and a second shaft sleeve 32 is vertically penetrated through one end of the operating plate 3. The second shaft sleeve 32 is coaxially sleeved on the second rotating shaft.

[0037] In the above embodiment, the operation panel 3 is rotated by the second shaft sleeve 32 and the second rotating shaft, and the assembly structure is simple.

[0038] As a preferred embodiment, a connecting portion 22 is provided at the upper part of one end of the HST operating rocker arm connecting member 2 corresponding to the center of the circle, and the connecting portion 22 is movably connected to the HST operating arm, and the HST operating arm is used to drive the connecting portion 22 to drive the HST operating rocker arm connecting member 2 to rotate up and down around the first rotating axis.

[0039] In the above implementation scheme, a hole is opened on the connecting portion 22, which is generally movably connected to the HST operating arm through a pin shaft passing through the hole, so that the HST operating arm drives the HST operating rocker arm connecting piece 2 to flip as the foot pedal moves, which is convenient for connection and assembly with the HST operating arm.

[0040] As a preferred embodiment, it also includes a brake link 5. The operating panel 3 is provided with an arc-shaped guide hole 33 coaxially distributed with its rotation trajectory. One end of the brake link 5 passes through the guide hole 33 through a pin shaft (denoted by a in the figure) vertically arranged thereto. The other end of the brake link 5 is connected to a clutch pedal. When the clutch pedal is stepped on, the brake link 5 and the pin shaft are driven to push the operating panel 3 to flip downward and separate the ratchet 31 from the tooth groove.

[0041] In the above implementation, the design of the brake link 5 provides another solution for unlocking the self-locking operating component. Specifically, when the cruise control needs to be released, the clutch pedal is stepped on to drive the brake link 5 to move, so that the pin at one end of the brake link 5 moves along the guide hole 33, and pushes the operating plate 3 to rotate clockwise, so that the ratchet 31 is disengaged from the tooth groove of the incomplete ratchet, thereby releasing the cruise control. The release of the cruise control is linked with the clutch pedal, and the operation is very convenient. It should be supplemented that the other end of the brake link 5 adopts a conventional mechanical structure (such as a pin connection or hinge) and the rod of the clutch pedal, which will not be described in detail here.

[0042] In this embodiment, the operating lever 4 extends vertically, and a connecting rod 41 is vertically provided at the lower end thereof. The connecting rod 41 vertically penetrates the operating panel 3 .

[0043] As a preferred embodiment, an elastic pulling member 6 is connected between any one of the mounting plates 11 and the operating plate 3 .

[0044] In the above embodiment, the elastic pulling member 6 is always in a stretched state, and thus will always exert a force on the operating panel 3 tending to rotate counterclockwise. After the ratchet 31 is engaged with the tooth groove, the elastic force of the elastic pulling member 6 will keep the ratchet 31 and the tooth groove in a good engaged state, that is, maintain a good cruise control state. When released, it can be driven normally to overcome the stretching force of the elastic pulling member 6.

[0045] As a preselected embodiment, the elastic pulling member 6 is a spring, and spring mounting points 7 are respectively provided on the outer side of the mounting plate 11 and on the same side of the operating plate 3 , and both ends of the spring are respectively connected to the two spring mounting points 7 .

[0046] In the above embodiment, the design of the spring mounting point 7 facilitates the assembly of the two ends of the spring. Generally, the spring mounting point 7 is a strip-shaped sheet metal part disposed on the mounting plate 11 and the operating plate 3, and a spring hanging hole is opened at the end of the sheet metal part. The hooks at both ends of the spring can be respectively hung with the hanging holes on the two spring mounting points 7, and the assembly is relatively simple and stable.

[0047] Example 2

[0048] The tractor of this embodiment includes the mechanical cruise control mechanism in the first embodiment.

[0049] 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", "axial", "radial", "circumferential" 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 referred device or element 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.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A mechanical cruise control mechanism, characterized in that: The invention comprises a mounting frame (1), an HST operating rocker arm connecting member (2) and a self-locking operating component. The HST operating rocker arm connecting member (2) is rotatably mounted in the mounting frame (1) and connected to the HST operating arm. As the HST operating arm rotates, the self-locking operating component is mounted in the mounting frame (1) and is adapted to the HST operating rocker arm connecting member (2) for locking or unlocking the HST operating rocker arm connecting member (2).

2. A mechanical cruise control mechanism according to claim 1, characterized in that: The mounting frame (1) comprises two parallel mounting plates (11), one end of the two mounting plates (11) being vertically connected with a first rotating shaft, and the HST operating rocker arm connecting member (2) comprises a first shaft sleeve (21), and the first shaft sleeve (21) is coaxially sleeved on the first rotating shaft.

3. A mechanical cruise control mechanism according to claim 2, characterized in that: The HST operating rocker arm connecting piece (2) is a fan-shaped incomplete ratchet, and a continuous tooth groove is provided on its arc edge. The first shaft sleeve (21) is vertically penetrated through one end of the HST operating rocker arm connecting piece (2) corresponding to the center of the circle. The self-locking operating component comprises an operating plate (3). The operating plate (3) is rotatably assembled between the other ends of the two mounting frames (1). A ratchet (31) adapted to the incomplete ratchet is provided on the upper part of one end of the operating plate (3) close to the HST operating rocker arm connecting piece (2). The operating plate (3) is movably connected to an operating lever (4). The operating lever (4) is used to drive the operating plate (3) to flip upwards under the action of an external force so that the ratchet (31) is engaged with the tooth groove, or to flip downwards so that the ratchet (31) is separated from the tooth groove.

4. A mechanical cruise control mechanism according to claim 3, characterized in that: A second rotating shaft is vertically connected between the other ends of the two mounting plates (11), and a second shaft sleeve (32) is vertically passed through one end of the operating plate (3), and the second shaft sleeve (32) is coaxially sleeved on the second rotating shaft.

5. The mechanical cruise control mechanism according to claim 3, characterized in that: A connecting portion (22) is provided at the upper portion of one end of the HST operating rocker arm connecting piece (2) corresponding to the center of the circle, and the connecting portion (22) is movably connected to the HST operating arm. The HST operating arm is used to drive the connecting portion (22) to drive the HST operating rocker arm connecting piece (2) to rotate up and down around the first rotating shaft.

6. A mechanical cruise control mechanism according to claim 3, characterized in that: The invention also comprises a brake link (5), wherein the operating panel (3) is provided with an arc-shaped guide hole (33) coaxially distributed with the rotation trajectory thereof, one end of the brake link (5) passes through the guide hole (33) via a pin shaft arranged perpendicular thereto, and the other end of the brake link (5) is connected to a clutch pedal. When the clutch pedal is stepped on, the brake link (5) and the pin shaft are driven to push the operating panel (3) to flip downward and separate the ratchet (31) from the tooth groove.

7. The mechanical cruise control mechanism according to claim 3, characterized in that: The operating rod (4) extends vertically, and a connecting rod (41) is vertically provided at the lower end thereof, and the connecting rod (41) vertically penetrates the operating panel (3).

8. A mechanical cruise control mechanism according to any one of claims 3 to 7, characterized in that: An elastic pulling member (6) is connected between any one of the mounting plates (11) and the operating plate (3).

9. A mechanical cruise control mechanism according to claim 8, characterized in that: The elastic pulling member (6) is a spring, and spring mounting points (7) are respectively provided on the outer side of the mounting plate (11) and on the same side of the operating plate (3), and the two ends of the spring are respectively connected to the two spring mounting points (7).

10. A tractor, characterized in that: It comprises a mechanical cruise control mechanism as claimed in any one of claims 1 to 9.

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