Leveling mechanism for working bucket of overhead working truck

Abstract

The utility model relates to the technical field of working vehicle leveling, and discloses an overhead working vehicle working bucket leveling mechanism which comprises a four-bar mechanism located between a chassis and a working bucket of an overhead working vehicle. The four-bar mechanism comprises a pair of parallel mounting rods; a chassis and a working bucket of the overhead working truck are fixed with the four-bar mechanism through a mounting rod; a protective cover is arranged at an oil injection hole in the four-bar mechanism; the protective cover is in running fit with the four-bar mechanism; a reset assembly is arranged between the protective cover and the four-bar mechanism. The oil injection device has the effect of reducing the possibility that dust is attached to the oil injection hole.

Description

Technical Field

[0001] This application relates to the field of aerial work platform leveling technology, and in particular to a leveling mechanism for the work bucket of an aerial work platform. Background Technology

[0002] An aerial work platform is a specialized machine capable of raising and lowering personnel or equipment to a specific height for aerial work. Its leveling mechanism plays a crucial role in maintaining the horizontal state of the work platform under different working conditions. This leveling mechanism is typically installed between the chassis and the work platform of the aerial work platform and connected to both.

[0003] Currently, most aerial work platforms use a four-bar linkage as their leveling mechanism. To ensure smooth operation of the four-bar linkage, an oil injection hole is usually installed at the rotating joint of the linkage. When performing maintenance on the four-bar linkage, workers can inject lubricating oil through the oil injection hole to reduce friction and wear, ensuring the normal operation of the mechanism.

[0004] However, a problem exists in actual use: the oil filling hole is exposed for a long time, making it easy for dust in the air to adhere to it. When oil is added through the oil filling hole, this dust may enter the four-bar linkage, thus affecting the lubrication effect and reducing the operating efficiency and service life of the mechanism. Utility Model Content

[0005] To reduce the possibility of dust adhering to the oil filling hole, this application provides a leveling mechanism for the working bucket of an aerial work platform.

[0006] The aerial work platform bucket leveling mechanism provided in this application adopts the following technical solution:

[0007] A leveling mechanism for the work bucket of an aerial work platform includes a four-bar linkage, wherein:

[0008] The four-bar linkage is located between the chassis and the work bucket of the aerial work platform vehicle;

[0009] The four-bar linkage includes a pair of parallel mounting rods;

[0010] The chassis and work bucket of the aerial work vehicle are fixed to the four-bar linkage via mounting rods;

[0011] The oil injection hole on the four-bar linkage is equipped with a protective cover;

[0012] The protective cover is rotatably engaged with the four-bar linkage.

[0013] A reset component is provided between the protective cover and the four-bar linkage.

[0014] Optionally, a first annular body is provided at the oil injection hole;

[0015] The protective cover is provided on the first ring body;

[0016] A protective space is formed between the four-bar linkage, the first ring body, and the protective cover;

[0017] The oil injection hole is located in the protective space.

[0018] Optionally, the side wall of the first ring body is provided with a plug-in groove;

[0019] The protective cover is inserted into the insertion slot.

[0020] Optionally, the insertion slot divides the first ring body into a first clamping ring and a second clamping ring;

[0021] Both the first clamping ring and the second clamping ring are provided with a second ring body;

[0022] The second ring body moves relative to the first ring body along the axial direction.

[0023] Optionally, a positioning ring is provided on the side of the second ring body near the insertion slot;

[0024] The protective cover is provided with a positioning groove;

[0025] The positioning ring is inserted into the positioning groove.

[0026] Optionally, a first return spring is provided between the second ring body and the first clamping ring.

[0027] Optionally, the reset assembly includes a mounting base and a second reset spring, wherein:

[0028] The mounting base is disposed on the four-bar linkage;

[0029] One end of the second reset spring is disposed on the mounting base;

[0030] The other end of the second reset spring is located on the protective cover.

[0031] Optionally, the protective cover is provided with a lever.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. The parallelogram structure of the four-bar linkage can automatically adjust the level of the work bucket, ensuring its stability and improving operational safety and efficiency. This structure allows the work bucket to remain level in different working positions, adapting to various working conditions and reducing safety hazards and operational inconveniences caused by tilting;

[0034] 2. The protective cover at the oil filling hole, in conjunction with the reset assembly, effectively isolates dust and other impurities, reducing their impact on the lubrication and operation of the mechanism, thereby extending its service life. The reset assembly automatically resets the protective cover after oil filling, preventing operators from forgetting to close it and further enhancing the protection of the oil filling hole;

[0035] 3. The operator can easily rotate the protective cover to perform oil filling, making operation simple. The automatic reset function of the reset assembly reduces manual intervention and lowers the risk of operational errors. In addition, the various components, such as the first ring, the second ring, and the positioning ring, cooperate to form a protective space and limit the protective cover, resulting in a stable structure that is easy to maintain. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0037] Figure 2 This is a schematic diagram illustrating the location of the oil injection hole in an embodiment of this application.

[0038] Figure 3 This is a schematic diagram illustrating the relative positions of the mounting base and the protective cover in an embodiment of this application.

[0039] Figure 4 This is a schematic diagram illustrating the structure of the first ring body in the embodiments of this application.

[0040] Figure 5 This is a schematic diagram illustrating the protective cover structure in an embodiment of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Four-bar linkage; 11. Mounting rod; 12. Oil injection hole; 2. Chassis; 3. Working bucket; 4. Protective cover; 41. Positioning groove; 42. Toggle lever; 5. First ring body; 51. Insertion groove; 52. First clamping ring; 53. Second clamping ring; 6. Second ring body; 61. Positioning ring; 7. First return spring; 8. Return assembly; 81. Mounting base; 82. Second return spring. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0044] This application discloses a leveling mechanism for the work bucket of an aerial work platform.

[0045] A leveling mechanism for the work bucket 3 of an aerial work platform includes a four-bar linkage 1, located between the chassis 2 and the work bucket 3 of the aerial work platform. The four-bar linkage 1 includes a pair of parallel mounting rods 11, and the chassis 2 and work bucket 3 of the aerial work platform are fixed to the four-bar linkage 1 via the mounting rods 11. A protective cover 4 is provided at the oil filling hole 12 on the four-bar linkage 1, and the protective cover 4 is rotatably engaged with the four-bar linkage 1. A reset assembly 8 is provided between the protective cover 4 and the four-bar linkage 1. The reset assembly 8 is used to automatically reset the protective cover 4 to its initial position after oil filling, ensuring that the protective cover 4 continuously protects the oil filling hole 12.

[0046] The parallelogram structure of the four-bar linkage 1 is used to level the work platform 3 of the aerial work platform, ensuring that the work platform 3 remains horizontal in different working positions. During normal operation of the four-bar linkage 1, the protective cover 4 protects the oil injection hole 12, reducing the possibility of dust in the air adhering to the oil injection hole 12. When it is necessary to lubricate the rotating joint of the four-bar linkage 1, the operator rotates the protective cover 4, causing the protective cover 4 to rotate around the rotating joint, thereby injecting lubricating oil into the four-bar linkage 1 through the oil injection hole 12. After the lubrication is completed, the reset assembly 8 uses its elasticity to reset the protective cover 4, once again protecting the oil injection hole 12. By resetting the protective cover 4 through the reset assembly 8, the possibility of dust adhering to the oil injection hole 12 due to the operator forgetting to close the protective cover 4 after the lubrication is completed is reduced.

[0047] A first ring body 5 is provided at the oil filling hole 12, and a protective cover 4 is provided on the first ring body 5. A protective space is formed between the four-bar linkage 1, the first ring body 5, and the protective cover 4, and the oil filling hole 12 is located in the protective space. The first ring body 5 is fixedly installed on the four-bar linkage 1, and the oil filling hole 12 is located in the protective space. Whether the four-bar linkage 1 is in normal operation or during the process of injecting lubricating oil through the oil filling hole 12, the protective space can protect the oil filling hole 12, reducing the possibility of dust adhering to the oil filling hole 12. At the same time, the first ring body 5 protects the protective cover 4, reducing the possibility of the protective cover 4 being deformed by impact, further improving the reliability of the protective cover 4.

[0048] The first ring body 5 has a insertion groove 51 on its side wall, and the protective cover 4 is inserted into the insertion groove 51. When protecting the oil filling hole 12, the inner wall of the insertion groove 51 limits the protective cover 4, thereby reducing the possibility of deformation or displacement of the protective cover 4 and further improving the protection effect of the oil filling hole 12. The insertion groove 51 divides the first ring body 5 into a first clamping ring 52 and a second clamping ring 53. Both the first clamping ring 52 and the second clamping ring 53 are provided with a second ring body 6, and the second ring body 6 moves relative to the first ring body 5 along the axial direction. The first clamping ring 52 is fixedly installed on the four-bar linkage 1, and the first clamping ring 52 and the second clamping ring 53 are coaxial. When the protective cover 4 is reset to protect the oil filling hole 12, the second ring body 6 on the first clamping ring 52 and the second clamping ring 53 both move towards the protective cover 4 and come into contact with the protective cover 4, thereby blocking the inner wall of the protective cover 4 and the insertion groove 51 and reducing the possibility of external dust flowing from the gap between the protective cover 4 and the insertion groove 51 to the oil filling hole 12.

[0049] The second ring body 6 has a positioning ring 61 on the side near the insertion slot 51, and the protective cover 4 has a positioning slot 41. The positioning ring 61 is inserted into the positioning slot 41. After the protective cover 4 is reset and moved to the initial position, the second ring body 6 moves towards the protective cover 4 and inserts the positioning ring 61 into the positioning slot 41, thereby further protecting the oil filling hole 12 with the protective cover 4. At the same time, the positioning ring 61 limits the protective cover 4 through the inner wall of the positioning slot 41, reducing the possibility that the protective cover 4 will be thrown out of the protective space when the four-bar linkage 1 is working.

[0050] A first return spring 7 is provided between the second ring body 6 and the first clamping ring 52. One end of the first return spring 7 is fixed to the first clamping ring 52, and the other end is fixed to the second ring body 6. The second ring body 6 is automatically moved by the first return spring 7. The installation method of the second ring body 6 and the second clamping ring 53 is similar. When it is necessary to remove the protective cover 4, the second ring body 6 is moved to disengage the positioning ring 61 from the positioning groove 41, thereby releasing the restriction on the protective cover 4.

[0051] The reset assembly 8 includes a mounting base 81 and a second reset spring 82. The mounting base 81 is mounted on the four-bar linkage 1. One end of the second reset spring 82 is mounted on the mounting base 81, and the other end is mounted on the protective cover 4. The line connecting the rotation centerline of the protective cover 4 and the mounting base 81 passes through the oil injection hole 12. When the protective cover 4 is removed from the protective space, the second reset spring 82 deforms. After oil injection is completed, the elastic force of the second reset spring 82 drives the protective cover 4 to move, thereby facilitating its reset.

[0052] Meanwhile, in order to facilitate the reset of the protective cover 4, the protective cover 4 may not be completely moved from the range of the second ring body 6 when it is rotated and removed, thereby reducing the possibility that the second ring body 6 will obstruct the reset of the protective cover 4 after it is removed.

[0053] The protective cover 4 is equipped with a lever 42. When it is necessary to remove the protective cover 4 from the protected space, the operator can move the protective cover 4 using the lever 42, which improves the convenience of moving the protective cover 4.

[0054] The implementation principle of the leveling mechanism for the work bucket 3 of an aerial work platform according to this application embodiment is as follows: the work bucket 3 of the aerial work platform is leveled by the parallelogram structure of the four-bar linkage 1. While keeping the work bucket 3 horizontal, the protective cover 4 protects the oil injection hole 12 on the four-bar linkage 1, reducing the possibility of dust adhering to the oil injection hole 12. When it is necessary to lubricate the rotating part of the four-bar linkage 1, the operator rotates the protective cover 4 to inject lubricating oil into the four-bar linkage 1 through the oil injection hole 12. After the oil injection is completed, the reset component 8 automatically resets the protective cover 4 to its initial position through its elastic action, protecting the oil injection hole 12 again. During the reset process of the protective cover 4, the second ring 6 moves towards the protective cover 4, inserting the positioning ring 61 into the positioning groove 41 on the protective cover 4, further cooperating with the protective cover 4 to protect the oil injection hole 12 and reducing the possibility of the protective cover 4 being thrown out of the protective space. At the same time, the first reset spring 7 controls the second ring 6 to move automatically, ensuring a tight fit between the protective cover 4 and the insertion groove 51. In addition, the lever 42 on the protective cover 4 improves the operator's ease of moving the protective cover 4.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A leveling mechanism for the work bucket of an aerial work platform, characterized in that: Including a four-bar linkage, wherein: The four-bar linkage is located between the chassis and the work bucket of the aerial work platform vehicle; The four-bar linkage includes a pair of parallel mounting rods; The chassis and work bucket of the aerial work vehicle are fixed to the four-bar linkage via mounting rods; The oil injection hole on the four-bar linkage is equipped with a protective cover; The protective cover is rotatably engaged with the four-bar linkage. A reset component is provided between the protective cover and the four-bar linkage.

2. The aerial work platform bucket leveling mechanism according to claim 1, characterized in that: A first ring is provided at the oil injection hole; The protective cover is provided on the first ring body; A protective space is formed between the four-bar linkage, the first ring body, and the protective cover; The oil injection hole is located in the protective space.

3. The aerial work platform bucket leveling mechanism according to claim 2, characterized in that: The first ring body has a insertion groove on its side wall; The protective cover is inserted into the insertion slot.

4. The aerial work platform bucket leveling mechanism according to claim 3, characterized in that: The insertion slot divides the first ring body into a first clamping ring and a second clamping ring; Both the first clamping ring and the second clamping ring are provided with a second ring body; The second ring body moves relative to the first ring body along the axial direction.

5. The aerial work platform bucket leveling mechanism according to claim 4, characterized in that: The second ring body is provided with a positioning ring on the side near the insertion slot; The protective cover is provided with a positioning groove; The positioning ring is inserted into the positioning groove.

6. The aerial work platform bucket leveling mechanism according to claim 4, characterized in that: A first return spring is provided between the second ring body and the first clamping ring.

7. The aerial work platform bucket leveling mechanism according to claim 1, characterized in that: The reset assembly includes a mounting base and a second reset spring, wherein: The mounting base is disposed on the four-bar linkage; One end of the second reset spring is disposed on the mounting base; The other end of the second reset spring is located on the protective cover.

8. The aerial work platform bucket leveling mechanism according to claim 7, characterized in that: The protective cover is equipped with a lever.

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