Tractor gearbox operating lever

Abstract

The utility model provides a tractor gearbox operating lever which comprises a lever body, the lever body is provided with an inserting hole which extends axially and penetrates through two ends, and the inserting hole is used for inserting a rotating shaft and achieving rotating connection between the lever body and a gearbox. A handle connecting part vertically extending is arranged at one end of the rod body, and the end part of the handle connecting part is used for mounting a handle; the other end of the rod body is provided with a shifting block which extends vertically and is used for selecting gears of the gearbox; a clamping groove with a radial opening is further formed in the outer wall of the rod body; and each gear of the gearbox is provided with a clamping ball which is elastically connected and clamped with the clamping groove. The rod body is rotated by driving the handle connecting part, and compared with the mode that the rod body is directly held and driven to rotate, the labor-saving purpose can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of tractor gearbox technology, specifically a tractor gearbox control lever. Background Technology

[0002] Existing tractor gearbox control systems generally adopt traditional mechanical lever structures. While these lever designs can achieve basic gear shifting functions, they have significant operational drawbacks: 1. The lever requires considerable force to push or pull to shift gears, which can easily lead to muscle fatigue for the operator during prolonged operation; 2. Gear selection relies on purely mechanical positioning and lacks an operational feedback mechanism, making it prone to accidental gear engagement in bumpy working environments; 3. Traditional levers require the operator to visually confirm the gear position, making blind control difficult and severely impacting work efficiency.

[0003] Therefore, how to overcome the above-mentioned defects has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To address the technical problems in the background art, this utility model discloses a tractor gearbox control lever.

[0005] This utility model provides a tractor gearbox control lever, including a lever body, the lever body being provided with axially extending insertion holes that extend through both ends for inserting a rotating shaft, thereby realizing a rotatable connection between the lever body and the gearbox;

[0006] One end of the rod is provided with a vertically extending handle connector, and the end of the handle connector is used to install a handle;

[0007] The other end of the lever is equipped with a vertically extending paddle for selecting the gearbox gear.

[0008] The outer wall of the rod is also provided with a slot with an opening facing radially;

[0009] Each gear in the transmission is equipped with a spring-loaded ball that engages with a slot.

[0010] The beneficial effects of the above design are: 1. The lever body can be rotated by driving the handle connection part, which saves effort compared to directly holding the lever body; 2. The radial groove on the outer wall of the lever body and the elastic ball of the gearbox form a double locking structure. When the operator moves the lever body, the embedded cooperation between the ball and the groove can produce clear tactile feedback, which can effectively avoid the phenomenon of accidentally engaging gears under bumpy conditions; 3. The locking of the ball by the groove can also improve the positional stability after engaging gears.

[0011] To improve the structural strength of the handle connection and prevent breakage, a further design feature is the addition of reinforcing ribs between the handle connection and the lever. The specific structure of these reinforcing ribs is as follows: The tractor gearbox control lever is characterized by its cross-shaped structure. The beneficial effects of this design are: 1. The cross-shaped cross-bracing forms a three-dimensional stress transmission path, effectively improving the bonding strength between the handle connection and the lever, and avoiding the risk of fatigue fracture due to long-term, high-frequency operation; 2. The closed frame structure formed by the reinforcing ribs and the lever increases the overall natural frequency of the control lever, effectively preventing resonance, and allowing the operator to more clearly confirm gear shifts through tactile feedback.

[0012] Furthermore, radially extending weight-reducing holes are provided on the rod. These holes are used to reduce the weight of the rod and lower costs.

[0013] When the tractor is working, it generates a high vibration frequency and a large vibration amplitude, resulting in low rotational stability of the rod. Based on this, a further improvement is made by: providing an arc-shaped limiting groove on the outer wall of the rod, which engages with the guide wheel installed on the tractor body; the limiting groove and the rod are arranged coaxially.

[0014] The length of the limiting groove directly affects the resistance to the rotation of the rod. Based on this, a further improvement is made: the limiting groove is of a slight arc shape.

[0015] The number of limiting grooves directly affects the stability of the rod's rotation. Based on this, a further improvement is to set at least two limiting grooves along the rod's axial direction.

[0016] Furthermore, the area between the limiting grooves forms a gap; the slot is provided on the gap. With this arrangement, the slot and limiting groove occupy less space in the rod body, making the rod structure more compact and the cost lower.

[0017] Since both the slot and the limiting groove need to be filled with lubricating oil, a further design is made to facilitate the addition of lubricating oil: the two ends of the slot are connected to the limiting groove.

[0018] The specific structure of the rod is as follows: it consists of a head, a first weight-reducing part, a guide part, a second weight-reducing part, and a tail part arranged in sequence; the guide part is cylindrical; it is located in the axial projection of the rod body, and the projections of the head, the first weight-reducing part, the second weight-reducing part, and the tail part are all covered by the projection of the guide part; the handle connection part is connected to the head; the lever is connected to the tail; weight-reducing holes are provided on the first weight-reducing part and the second weight-reducing part; the slot and the limiting slot are provided on the guide part.

[0019] The beneficial effects of this utility model are: 1. By driving the handle connection part, the rod body can be rotated. Compared with directly holding the rod body, driving the rod body to rotate can save effort; 2. The radial groove on the outer wall of the rod body and the gearbox gear elastic ball form a double locking structure. When the operator moves the rod body, the embedded cooperation between the ball and the groove can produce clear tactile feedback, which can effectively avoid the phenomenon of accidentally engaging gears under bumpy conditions; 3. By locking the ball in the groove, the positional stability after engaging gears can also be improved. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0023] Figure 3 This is the front view of this utility model;

[0024] Figure 4 yes Figure 3 Sectional view of AA;

[0025] Figure 5 yes Figure 3 Sectional view of BB;

[0026] Figure 6 yes Figure 3 Sectional view of CC;

[0027] Figure 7 yes Figure 3 Sectional view of DD;

[0028] In the diagram: 1. Rod body; 2. Insertion hole; 3. Handle connection part; 4. Toggle block; 5. Slot; 6. Reinforcing rib; 7. Weight reduction hole; 8. Limiting groove; 9. Spacing part; 11. Head; 12. First weight reduction part; 13. Guide part; 14. Second weight reduction part; 15. Tail. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] like Figure 1-3 As shown, this utility model discloses a tractor gearbox control lever, including a lever body 1. The lever body 1 is provided with axially extending insertion holes 2 that pass through both ends for inserting a rotating shaft, so as to realize the rotational connection between the lever body 1 and the gearbox.

[0031] The rod body 1 is composed of a head 11, a first weight-reducing section 12, a guide section 13, a second weight-reducing section 14, and a tail section 15 arranged sequentially. The head 11 is cylindrical, and its diameter is smaller than that of the guide section 13. An integrally formed handle connecting part 3 extends radially from the head 11. The end of the handle connecting part 3 is provided with a threaded hole for threaded connection with the handle, facilitating the operator's grip and operation to drive the rod body 1 to rotate. A reinforcing rib 6 is also connected between the handle connecting part 3 and the rod body 1. Figure 7 As shown, the reinforcing ribs 6 form a cross shape. The beneficial effects of the above design are: 1. The three-dimensional stress transmission path is formed by the cross-shaped cross support, which can effectively improve the bonding strength between the handle connection 3 and the rod 1, avoiding the risk of fatigue fracture of the connection due to long-term high-frequency operation; 2. The closed frame structure formed by the reinforcing ribs 6 and the rod 1 increases the overall natural frequency of the control lever, effectively avoiding resonance, and allowing the operator to more clearly confirm the gear shift through tactile perception.

[0032] The axial cross-section of both the first weight-reducing section 12 and the second weight-reducing section 14 is oblong, and its length is less than the diameter of the guide section 13. Both the first weight-reducing section 12 and the second weight-reducing section 14 are provided with weight-reducing holes 7 to reduce the weight of the rod 1 and reduce costs. The weight-reducing holes 7 are rectangular and extend through both sides of the first weight-reducing section 12 and the second weight-reducing section 14 in the width direction.

[0033] A one-piece lever 4 extends radially from the tail 15, with the lever 4 facing away from the handle connection part 3. When the lever 1 rotates, the lever 4 rotates to different positions. By driving the handle connection part 3, the lever 1 can be rotated, which saves effort compared to directly gripping the lever 1.

[0034] like Figure 5 and Figure 6 As shown, the guide part 13 is cylindrical, and its outer wall is provided with at least two limiting grooves 8. In this embodiment, there are three limiting grooves 8, which are arranged at intervals along the axial direction of the rod 1. The limiting grooves 8 are arc-shaped and coaxial with the rod 1. The limiting grooves 8 are used to engage with the guide wheels installed on the tractor body to improve the stability of the rotation of the rod 1.

[0035] like Figure 4 As shown, the portion between the limiting grooves 8 is designated as a spacer 9. An arc-shaped groove 5 is formed at the center of the spacer 9, with its opening facing outwards from the rod 1 and perpendicular to the axis of the rod 1. Each gear position of the gearbox is equipped with a spring-loaded ball that engages with the groove 5. The radial groove 5 on the outer wall of the rod 1 and the spring-loaded ball of the gearbox form a double-locking structure. When the operator moves the rod 1, the embedded engagement of the ball with the groove 5 provides clear tactile feedback, effectively preventing accidental gear engagement under bumpy conditions. Furthermore, the engagement of the ball with the groove 5 also improves the positional stability after gear engagement.

[0036] The positioning of the slot 5 and the limiting slot 8 makes the space occupied by the slot 5 and the limiting slot 8 on the rod body 1 smaller, making the structure of the rod body 1 more compact and the cost lower.

[0037] The two ends of the slot 5 are connected to the limiting slot 8. With this setting, you only need to add lubricating oil to the limiting slot 8, and the lubricating oil will automatically flow to the slot 5, making it more convenient to add lubricating oil.

[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A tractor gearbox control lever, comprising a lever body (1), characterized in that: The rod (1) is provided with axially extending insertion holes (2) that pass through both ends, for inserting a rotating shaft to realize the rotatable connection between the rod (1) and the gearbox; One end of the rod (1) is provided with a vertically extending handle connection part (3), and the end of the handle connection part (3) is used to install a handle; The other end of the lever (1) is provided with a vertically extending lever (4) for selecting the gear of the gearbox; The outer wall of the rod (1) is also provided with a slot (5) with the opening facing radially; Each gear of the gearbox is provided with a flexible ball that engages with the slot (5).

2. The tractor gearbox control lever according to claim 1, characterized in that: A reinforcing rib (6) is also connected between the handle connecting part (3) and the rod body (1).

3. The tractor gearbox control lever according to claim 2, characterized in that: The reinforcing ribs (6) form a cross shape.

4. The tractor gearbox control lever according to claim 3, characterized in that: The rod (1) is also provided with radially extending weight-reducing holes (7).

5. The tractor gearbox control lever according to claim 4, characterized in that: The outer wall of the rod (1) is provided with an arc-shaped limiting groove (8), which engages with the guide wheel installed on the tractor body; The limiting groove (8) is arranged coaxially with the rod (1).

6. The tractor gearbox control lever according to claim 5, characterized in that: The limiting groove (8) is of inferior arc shape.

7. The tractor gearbox control lever according to claim 6, characterized in that: The limiting groove (8) is provided in at least two along the axial direction of the rod (1).

8. The tractor gearbox control lever according to claim 7, characterized in that: The area between the limiting grooves (8) forms a gap (9); The card slot (5) is provided on the spacer (9).

9. The tractor gearbox control lever according to claim 8, characterized in that: The two ends of the card slot (5) are connected to the limiting slot (8).

10. The tractor gearbox control lever according to claim 9, characterized in that: The rod (1) is composed of a head (11), a first weight-reducing part (12), a guide part (13), a second weight-reducing part (14) and a tail part (15) arranged in sequence; The guide part (13) is cylindrical; In the axial projection of the rod (1), the projections of the head (11), the first weight-reducing part (12), the second weight-reducing part (14) and the tail (15) are all covered by the projection of the guide part (13); The handle connecting part (3) is connected to the head (11); The push block (4) is connected to the tail (15); The weight reduction hole (7) is provided on the first weight reduction part (12) and the second weight reduction part (14); The card slot (5) and the limiting slot (8) are provided on the guide part (13).

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