Hood lock for tractor

Abstract

The utility model belongs to the technical field of agricultural machinery parts, and discloses a hood lock for a tractor, which comprises a lock seat matched with a lock column, a spring bolt hinged on the lock seat through a hinge assembly, a control reset assembly connected with the spring bolt, a hook groove arranged on the spring bolt, a hinge assembly comprising a hinge bolt and a lock nut which are installed together through threads, and a lock nut connected with the lock bolt through threads. The control reset assembly comprises an elastic element and an operating rod; the hood lock is simple and practical in structure, convenient to maintain, capable of being directly applied to the tractor and low in manufacturing cost, and the failure rate and the failure rate of the hood lock are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery accessories, in particular to a hood lock for a tractor. Background Art

[0002] The tractor hood lock is an important part of agricultural machinery accessories. Its main function is to stably fix the tractor hood to prevent it from falling off due to vibration or strong wind, thereby protecting the internal parts of the tractor from damage and extending the service life of the tractor. It also has a certain anti-theft function to ensure the safety of agricultural machinery.

[0003] A hood lock is proposed in a Chinese utility model patent with patent application number 201120130257.0. The main problems of this patent are as follows: first, a bidirectional fixing structure is adopted in this patent, which requires the locking plate and the hook-shaped locking plate to cooperate with each other to lock the lock column. After long-term use, the matching surfaces of the locking plate and the hook-shaped locking plate are worn, and the elastic force of the spring is also damaged, resulting in poor locking reliability between the locking plate and the hook-shaped locking plate; second, the bidirectional fixing structure causes the structure of the hood lock to be relatively complex, with more parts, which makes the manufacturing cost of the hood lock higher. Utility Model Content

[0004] The main technical problem to be solved by the utility model is to provide a tractor hood lock, which has a simple and practical structure, is easy to maintain, can be directly applied to the tractor, has a low manufacturing cost, and reduces the failure rate and malfunction rate of the hood lock.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A hood lock for a tractor, comprising a lock seat adapted to a lock column, the lock seat being fixedly mounted on the tractor hood, a lock tongue being hingedly mounted on the lock seat through a hinge assembly, the lock tongue being connected to a manipulation and reset assembly for controlling the rotation and reset of the lock tongue, and a hook groove for covering the lock column being arranged on the lock tongue;

[0007] The hinge assembly includes a hinge bolt, a lock seat and a lock tongue are both provided with axial holes, the two axial holes are coaxially arranged, a nut of the hinge bolt is pressed against the outer wall of the lock seat, a screw rod of the hinge bolt passes through the two axial holes in sequence, an end of the hinge bolt extending out of the axial hole is provided with a locking nut in a threaded connection manner, a washer is pressed between the locking nut and the side wall of the lock tongue, and the washer is sleeved on the hinge bolt;

[0008] The manipulation reset assembly comprises an elastic element and an operating rod, the two ends of the elastic element are respectively connected to the lock seat and the lock tongue, one end of the operating rod is installed on the lock tongue, and the other end of the operating rod is provided with a pull ring.

[0009] The following is a further optimization of the above technical solution by the utility model:

[0010] The locking tongue includes a control part, a hinge part and a locking part which are integrally formed. The elastic element and the operating rod are both installed on the control part. The axial hole is set through the hinge part. The hook groove is set on the side wall of the locking part. The bottom of the locking part is provided with an inclined surface which is adapted to the lock column.

[0011] Further optimization: the lock seat includes an integrally formed U-shaped plate and two connecting plates, the two connecting plates are respectively arranged at the two ends of the U-shaped plate, the connecting plates are both installed on the hood, the shaft hole is set through the middle position of the upper end of the U-shaped plate, and a pair of guide parts protrude downward from the bottom of the U-shaped plate, and a trumpet-shaped guide groove is formed between the two guide parts, and an shaft groove is provided at the bottom of the guide groove, which is adapted to the lock column.

[0012] Further optimization: an arc-shaped sliding hole is penetrated through the U-shaped plate, a guide rod is fixed on the locking part, and the guide rod passes through and is slidably installed in the arc-shaped sliding hole.

[0013] Further optimization: the elastic element and the operating rod are respectively arranged on both sides of the control part.

[0014] Further optimization: the operating rod and the hook groove are arranged on the same side of the locking tongue.

[0015] The utility model adopts the above technical solution and has the following beneficial effects:

[0016] 1. The utility model adopts a single-side locking structure, and the structure and locking start method are very simple, so the manufacturing difficulty and maintenance difficulty of the hood lock are relatively low, and the manufacturing cost is low.

[0017] 2. Compared with the hood lock of the traditional two-way fixed structure, the hood lock of the utility model has fewer parts and components, the probability of failure is low, and there is no mutual wear between the two locking parts, thereby effectively reducing the failure rate of the hood lock and ensuring the reliability of the hood lock.

[0018] 3. The lock seat adopted by the utility model can be directly fixed on the hood and used in conjunction with the existing lock column on the tractor head. There is no need to replace and manufacture the original lock column and other structures of the tractor, so it is suitable for use with different tractors and has higher practicality.

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 labor.

[0021] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the utility model;

[0022] Figure 2 This is a structural schematic diagram of a hinged assembly in an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the lock seat in the embodiment of the utility model;

[0024] Figure 4 for Figure 3 A top view schematic diagram of

[0025] Figure 5 It is a schematic diagram of the structure of the lock tongue in the embodiment of the utility model.

[0026] In the figure: 1-locking column; 2-locking seat; 21-U-shaped plate; 22-connecting plate; 23-guide part; 24-guide groove; 25-axial groove; 26-arc sliding hole; 3-hinge assembly; 31-hinge bolt; 32-locking nut; 33-axial hole; 34-washer; 4-locking tongue; 41-control part; 42-hinge part; 43-locking part; 44-inclined surface; 45-guide rod; 5-operation reset assembly; 51-elastic element; 52-operating rod; 53-pull ring; 6-hook groove; 7-fixed seat; 8-column. DETAILED DESCRIPTION

[0027] 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 of 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.

[0028] like Figure 1-Figure 5 As shown together, a hood lock for a tractor includes a lock seat 2 adapted to a lock column 1, the lock seat 2 is fixedly mounted on the tractor hood, a lock tongue 4 is hingedly mounted on the lock seat 2 via a hinged assembly 3, the lock tongue 4 is connected to an operating and resetting assembly 5 for controlling the rotation and resetting of the lock tongue 4, and a hook groove 6 for covering the locking column 1 is provided on the lock tongue 4.

[0029] In this embodiment, the locking cylinder 1 is arranged horizontally.

[0030] In this embodiment, a fixing seat 7 is fixed on the head of the tractor, a column 8 is fixed on the fixing seat 7 , and the locking column 1 is fixed to the upper end of the column 8 .

[0031] like Figure 1 and Figure 2 As shown together, the hinge assembly 3 includes a hinge bolt 31, and the lock base 2 and the lock tongue 4 are both penetrated by an axial hole 33, the two axial holes 33 are coaxially arranged, the nut of the hinge bolt 31 is pressed against the outer wall of the lock base 2, and the screw rod of the hinge bolt 31 passes through the two axial holes 33 in sequence, and the end of the hinge bolt 31 extending out of the axial hole 33 is installed with a lock nut 32 in a threaded connection manner, and a washer 34 is pressed between the lock nut 32 and the side wall of the lock tongue 4, and the washer 34 is sleeved on the hinge bolt 31.

[0032] In this embodiment, the provision of the anti-loosening nut 32 solves the problem of the anti-loosening nut 32 being loosened due to excessive vibration when the tractor is moving, thereby preventing the locking tongue 4 from falling off.

[0033] In this embodiment, the provision of the anti-loosening nut 32 effectively reduces the failure rate and malfunction rate of the hood lock, thereby improving the reliability of the hood lock.

[0034] like Figure 1 and Figure 5 As shown together, the manipulation reset assembly 5 includes an elastic element 51 and an operating rod 52, the two ends of the elastic element 51 are respectively connected to the lock seat 2 and the lock tongue 4, one end of the operating rod 52 is installed on the lock tongue 4, and the other end of the operating rod 52 is provided with a pull ring 53.

[0035] In this embodiment, the elastic element 51 may be a tension spring.

[0036] In this embodiment, the structure of the manipulation and reset assembly 5 is very simple, which is convenient for the driver to operate and maintain.

[0037] Among them, the locking tongue 4 includes a control part 41, a hinge part 42 and a locking part 43 which are integrally formed, the elastic element 51 and the operating rod 52 are both installed on the control part 41, the axial hole 33 is penetrated through the hinge part 42, the hook groove 6 is arranged on the side wall of the locking part 43, and the bottom of the locking part 43 is provided with an inclined surface 44 which is adapted to the lock column 1.

[0038] like Figure 1 , Figure 3 and Figure 4As shown together, the lock seat 2 includes an integrally formed U-shaped plate 21 and two connecting plates 22, the two connecting plates 22 are respectively arranged at the two ends of the U-shaped plate 21, and the connecting plates 22 are installed on the hood. The shaft hole 33 is set through the middle position of the upper end of the U-shaped plate 21, and a pair of guide parts 23 protrude downward from the bottom of the U-shaped plate 21. A trumpet-shaped guide groove 24 is formed between the two guide parts 23, and an axis groove 25 is provided at the bottom of the guide groove 24, and the axis groove 25 is adapted to the lock column 1.

[0039] In this embodiment, the lock base 2, the lock tongue 4 and the structure, fixing, connection and control principles of the two are very simple, achieving the purpose of reducing the difficulty of production and manufacturing and reducing the manufacturing cost.

[0040] In this embodiment, the connecting plate 22 is fixed to the hood by screws.

[0041] In this embodiment, the hood lock can be applied to the existing lock column 1 on the tractor without the need for additional replacement, and is highly practical.

[0042] An arc-shaped sliding hole 26 is formed through the U-shaped plate 21 . A guide rod 45 is fixed to the locking portion 43 . The guide rod 45 passes through and is slidably installed in the arc-shaped sliding hole 26 .

[0043] In this embodiment, the provision of the arc-shaped sliding hole 26 and the guide rod 45 plays a role in guiding the rotation of the lock tongue 4, thereby improving the stability and smoothness of the rotation of the lock tongue 4.

[0044] The elastic element 51 and the operating rod 52 are respectively disposed on two sides of the control portion 41 .

[0045] The operating rod 52 and the hook groove 6 are arranged on the same side of the locking tongue 4 .

[0046] The method of securing the hood using the hood lock is as follows:

[0047] In the first step, the hood is buckled down onto the machine head, and the lock seat 2 gradually approaches the lock column 1 following the movement of the hood.

[0048] In the second step, the guide portion 23 on the lock seat 2 first contacts the lock cylinder 1 , and during the process of the lock cylinder 1 being inserted upward into the guide groove 24 , the lock cylinder 1 is always pressed on the inclined surface 44 .

[0049] In the third step, the lock column 1 exerts a reverse force on the lock tongue 4 to rotate outward under the action of the inclined surface 44, pushing the lock tongue 4 to rotate counterclockwise (such as Figure 1 As shown in the middle direction, the rotation of the lock tongue 4 will gradually open the shaft groove 25, so that the lock column 1 can enter the shaft groove 25.

[0050] In the fourth step, when the lock column 1 completely enters the shaft groove 25, the locking portion 43 rotates to the highest position, at which time the lock column 1 is separated from the inclined surface 44, and then under the elastic force of the elastic element 51, the lock tongue 4 rotates clockwise inward.

[0051] In the fifth step, when the lock tongue 4 rotates to the initial position, the lock column 1 enters the hook groove 6, and the lock column 1 is completely covered and fixed by the hook groove 6 and the shaft groove 25, thereby realizing the closure of the hood lock.

[0052] To unlock the hood lock:

[0053] In the first step, the operating rod 52 is pulled, and the operating rod 52 pulls the lock tongue 4 to rotate outward, so that the lock column 1 is disengaged from the hook groove 6. At this time, the lock column 1 can be withdrawn from the bottom of the shaft groove 25.

[0054] In the second step, the engine cover is pulled upwards to gradually move the lock seat 2 away from the lock cylinder 1, thereby withdrawing the lock cylinder 1 from the shaft groove 25 and the guide groove 24 in sequence.

[0055] In the third step, the operating rod 52 is released, and the locking tongue 4 rotates back to its original position under the elastic force of the elastic element 51 .

[0056] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hood lock for a tractor, comprising a lock seat (2) adapted to a lock column (1), characterized in that: The lock seat (2) is fixedly mounted on the tractor hood, a lock tongue (4) is hingedly mounted on the lock seat (2) via a hinge assembly (3), the lock tongue (4) is connected to a manipulation and reset assembly (5) for controlling the rotation and reset of the lock tongue (4), and a hook groove (6) for covering the locking column (1) is provided on the lock tongue (4); The hinge assembly (3) comprises a hinge bolt (31), a lock base (2) and a lock tongue (4) both having axial holes (33) extending therethrough, the two axial holes (33) being coaxially arranged, a nut of the hinge bolt (31) being pressed against an outer wall of the lock base (2), a screw rod of the hinge bolt (31) passing through the two axial holes (33) in sequence, an end of the hinge bolt (31) extending out of the axial hole (33) being provided with a locking nut (32) in a threaded connection manner, a washer (34) being pressed against the locking nut (32) and a side wall of the lock tongue (4), the washer (34) being sleeved on the hinge bolt (31); The manipulation reset assembly (5) comprises an elastic element (51) and an operating rod (52), wherein two ends of the elastic element (51) are respectively connected to the lock seat (2) and the lock tongue (4), one end of the operating rod (52) is mounted on the lock tongue (4), and the other end of the operating rod (52) is provided with a pull ring (53).

2. A tractor hood lock according to claim 1, characterized in that: The locking tongue (4) comprises a control portion (41), a hinge portion (42) and a locking portion (43) which are integrally formed, the elastic element (51) and the operating rod (52) are both mounted on the control portion (41), the shaft hole (33) is penetrated through the hinge portion (42), the hook groove (6) is arranged on the side wall of the locking portion (43), and the bottom of the locking portion (43) is provided with an inclined surface (44) which is adapted to the lock column (1).

3. A tractor hood lock according to claim 2, characterized in that: The lock seat (2) comprises an integrally formed U-shaped plate (21) and two connecting plates (22). The two connecting plates (22) are respectively arranged at two ends of the U-shaped plate (21). The connecting plates (22) are both mounted on the hood. An axial hole (33) is arranged through the middle position of the upper end of the U-shaped plate (21). A pair of guide portions (23) protrude downward from the bottom of the U-shaped plate (21). A horn-shaped guide groove (24) is formed between the two guide portions (23). An axial groove (25) is arranged at the bottom of the guide groove (24). The axial groove (25) is adapted to fit the lock column (1).

4. A tractor hood lock according to claim 3, characterized in that: The U-shaped plate (21) is provided with an arc-shaped sliding hole (26) penetrating therethrough, and a guide rod (45) is fixed on the locking portion (43), and the guide rod (45) passes through and is slidably installed in the arc-shaped sliding hole (26).

5. A tractor hood lock according to claim 4, characterized in that: The elastic element (51) and the operating rod (52) are respectively arranged on two sides of the control part (41).

6. A tractor hood lock according to claim 5, characterized in that: The operating rod (52) and the hook groove (6) are arranged on the same side of the locking tongue (4).

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