Bucket rod device of hydraulic excavator

Abstract

The utility model provides a bucket rod device of a hydraulic excavator, which belongs to the technical field of excavator accessories and comprises a bucket rod, an extension rod arranged on the outer wall of the bucket rod and a connecting piece arranged on the outer wall of the extension rod, the inner wall of the extension rod is slidably connected with the outer wall of the bucket rod, and an extension component is arranged in the extension rod. According to the bucket rod device of the hydraulic excavator, by arranging a limiting rod and a hydraulic push rod, the hydraulic push rod can drive a push plate to move by controlling operation of the hydraulic push rod, and due to the fact that the outer wall of the push plate is fixedly connected with the inner wall of an extension rod, when the push plate moves, the extension rod can be driven to move; at the moment, the outer wall of the limiting rod is in sliding connection with the inner wall of the extension rod, so that when the extension rod moves, the limiting rod can limit the moving track of the extension rod, the stability of the extension rod in the moving process is guaranteed, and the problem that the working range of the bucket is limited due to the insufficient length of the bucket rod is solved.

Description

Technical Field

[0001] The utility model relates to the field of excavator accessories, and more specifically, to a boom device of a hydraulic excavator. Background Technique

[0002] An excavator, also known as an excavation machine or a power shovel, is an earthmoving machine that uses a bucket to excavate materials above or below the machine's operating surface and load them into transport vehicles or unload them onto a stockpile. The materials excavated by the excavator are mainly soil, coal, sediment, and pre-loosened soil and rock. From the development of construction machinery in recent years, the development of excavators has been relatively rapid, and excavators have become one of the most important construction machinery in engineering construction.

[0003] Chinese Patent Publication No. CN112359893B discloses an excavator boom. The reinforcing plate is designed as a double-layer plate, and reinforcing columns are arranged between the double-layer plates to enhance the strength of the reinforcing plate, thereby enhancing the strength of the excavator boom; a first mounting seat and a second mounting seat are respectively arranged at both ends of the reinforcing plate to avoid curved surface welding and relieve stress concentration; the force on the rear support can be transmitted to the third side plate and can also be transmitted to the upper sealing plate through the reinforcing plate and the first mounting seat, reducing the stress concentration near the rear support.

[0004] Since the outer shell of the above boom is an integral structure, the length of the boom cannot be changed. When the boom cannot be adjusted in length, the working range of the bucket connected to one end of the boom will be fixed and cannot be adjusted according to the needs, reducing the applicable range of the pulled boom. To make up for the above deficiencies, the utility model provides a boom device of a hydraulic excavator. Content of the Utility Model

[0005] To make up for the above deficiencies, the utility model provides a boom device of a hydraulic excavator, aiming to solve the problems raised in the above background technique.

[0006] To achieve the above object, the utility model provides the following technical solution: A boom device of a hydraulic excavator, comprising a boom and an extension rod arranged on the outer wall of the boom. The inner wall of the extension rod is slidably connected to the outer wall of the boom, and a connecting member is arranged on the outer wall of the extension rod. An extension assembly is arranged inside the extension rod.

[0007] The extension assembly is composed of a pushing unit, a limiting unit, and an auxiliary unit. The pushing unit is located inside the extension rod, the limiting unit is located inside the extension rod, and the auxiliary unit is located inside the boom.

[0008] Preferably, the pushing unit includes a limiting rod, a push plate, and a hydraulic push rod. The limiting rod is installed on the inner wall of the extension rod, the push plate is fixedly connected to the inner wall of the extension rod, and the hydraulic push rod is installed on the outer wall of the push plate.

[0009] By adopting the above technical solution, the presence of the limiting rod can restrict the movement trajectory of the extension rod, ensuring the stability of the movement trajectory of the extension rod. The movement adjustment of the extension rod can be driven by controlling the operation of the hydraulic push rod so that the push plate drives the extension rod to move.

[0010] Preferably, the outer wall of the limiting rod is fixedly connected to the outer wall of the bucket rod and is slidably connected to the inner wall of the extension rod. The hydraulic push rod is located inside the bucket rod and is fixedly connected to the inner wall of the bucket rod.

[0011] By adopting the above technical solution, the limiting rod can support and limit the extension rod through the bucket rod, and the movement adjustment of the extension rod can be driven by controlling the hydraulic push rod so that the push plate drives the extension rod to move.

[0012] Preferably, the limiting unit includes an outer frame, a moving rod and a clamping block. The outer frame is fixedly connected to the inner wall of the bucket rod. The moving rod is slidably connected to the temporal part of the outer frame. The clamping block is clamped inside the extension rod.

[0013] By adopting the above technical solution, the moving rod can move inside the outer frame, and the clamping block can limit the position of the extension rod.

[0014] Preferably, the moving rod penetrates through the bucket rod and extends to the outside of the bucket rod. The outer wall of the moving rod is slidably connected to the inner wall of the bucket rod penetrated. A notch is formed inside the extension rod. The outer wall of the clamping block is fixedly connected to the outer wall of the moving rod. The clamping block is clamped with the notch.

[0015] By adopting the above technical solution, the moving rod can slide inside the bucket rod. When the moving rod moves, it can drive the clamping block to move. By clamping the clamping block into the notch, the limiting of the extension rod is completed.

[0016] Preferably, the auxiliary unit includes a spring, a motor and a half gear. The spring is fixedly connected to the outer wall of the moving rod. The motor is fixedly connected to the bottom of the inner wall of the bucket rod. The half gear is installed at the output end of the motor.

[0017] By adopting the above technical solution, the presence of the spring can push the moving rod to reset. When the motor operates, it can drive the half gear to operate.

[0018] Preferably, the side of the spring away from the moving rod is fixedly connected to the outer wall of the outer frame. A tooth groove is formed at the bottom of the moving rod. The half gear meshes with the tooth groove.

[0019] By adopting the above technical solution, when the half gear operates, it can drive the moving rod to move through the tooth groove, thereby adjusting the position of the clamping block.

[0020] The utility model provides a dipper arm device for a hydraulic excavator, and the dipper arm device of the hydraulic excavator has the following beneficial effects:

[0021] 1. For the dipper arm device of the hydraulic excavator, by arranging a limiting rod and a hydraulic push rod, the operation of the hydraulic push rod can be controlled to drive a push plate to move. Since the outer wall of the push plate is fixedly connected to the inner wall of the extension rod, when the push plate moves, the extension rod will be driven to move. At this time, the outer wall of the limiting rod is slidably connected to the inner wall of the extension rod. Therefore, when the extension rod moves, the limiting rod will limit the movement track of the extension rod to ensure the stability of the extension rod during movement, solving the problem that the working range of the bucket is limited due to insufficient dipper arm length.

[0022] 2. For the dipper arm device of the hydraulic excavator, by arranging a clamping block and a semi-gear, after the position of the extension rod is adjusted, the operation of the motor is controlled to separate the semi-gear from the moving rod. At this time, the spring located inside the outer frame will push the moving rod to move, so that the clamping block limits the extension rod to ensure the stability of the extension rod after the adjustment is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a three-dimensional schematic diagram of the overall structure provided by the embodiment of the present utility model;

[0025] Figure 2 is a schematic diagram of the dipper arm structure provided by the embodiment of the present utility model;

[0026] Figure 3 is a schematic diagram of the internal structure of the dipper arm structure provided by the embodiment of the present utility model;

[0027] Figure 4 is a partial schematic diagram of the internal structure of the extension rod provided by the embodiment of the present utility model.

[0028] In the figure: 1, dipper arm; 2, extension rod; 3, connecting piece; 4, extension assembly; 401, limiting rod; 402, push plate; 403, hydraulic push rod; 404, outer frame; 405, moving rod; 406, clamping block; 407, spring; 408, motor; 409, semi-gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] As Figures 1-4 shown, the present utility model provides a technical solution: a boom device of a hydraulic excavator, including a boom 1 and an extension rod 2 provided on the outer wall of the boom 1. The inner wall of the extension rod 2 is slidably connected to the outer wall of the boom 1. A connecting member 3 is provided on the outer wall of the extension rod 2. An extension assembly 4 is provided inside the extension rod 2. The extension assembly 4 is composed of a pushing unit, a limiting unit, and an assisting unit. The pushing unit is located inside the extension rod 2. The limiting unit is located inside the extension rod 2. The assisting unit is located inside the boom 1.

[0031] The pushing unit includes a limiting rod 401, a push plate 402, and a hydraulic push rod 403. The limiting rod 401 is installed on the inner wall of the extension rod 2. The outer wall of the limiting rod 401 is fixedly connected to the outer wall of the boom 1 and is slidably connected to the inner wall of the extension rod 2. The limiting rod 401 can limit and support the extension rod 2 through the boom 1. The push plate 402 is fixedly connected to the inner wall of the extension rod 2. The hydraulic push rod 403 is installed on the outer wall of the push plate 402. The hydraulic push rod 403 is located inside the boom 1 and is fixedly connected to the inner wall of the boom 1. By controlling the hydraulic push rod 403, the push plate 402 can be driven to move the extension rod 2 for adjustment.

[0032] By providing the limiting rod 401 and the hydraulic push rod 403, the operation of the hydraulic push rod 403 can be controlled to drive the push plate 402 to move. Since the outer wall of the push plate 402 is fixedly connected to the inner wall of the extension rod 2, when the push plate 402 moves, the extension rod 2 will be driven to move. At this time, the outer wall of the limiting rod 401 is slidably connected to the inner wall of the extension rod 2. Therefore, when the extension rod 2 moves, the limiting rod 401 will limit the movement trajectory of the extension rod 2 to ensure the stability of the extension rod 2 during movement, solving the problem that the length of the boom 1 is insufficient, resulting in the limited working range of the bucket.

[0033] The limiting unit includes an outer frame 404, a moving rod 405, and a clamping block 406. The outer frame 404 is fixedly connected to the inner wall of the bucket arm 1. The moving rod 405 is slidably connected to the temporal part of the outer frame 404. The moving rod 405 penetrates the bucket arm 1 and extends to the outside of the bucket arm 1. The outer wall of the moving rod 405 is slidably connected to the penetrated inner wall of the bucket arm 1. The moving rod 405 can slide inside the bucket arm 1. The clamping block 406 is clamped inside the extension rod 2. A notch is formed inside the extension rod 2. The outer wall of the clamping block 406 is fixedly connected to the outer wall of the moving rod 405. The clamping block 406 is clamped with the notch. When the moving rod 405 moves, it can drive the clamping block 406 to move. By clamping the clamping block 406 into the notch, the limiting of the extension rod 2 is completed.

[0034] The auxiliary unit includes a spring 407, a motor 408, and a semi-gear 409. The spring 407 is fixedly connected to the outer wall of the moving rod 405. The side of the spring 407 away from the moving rod 405 is fixedly connected to the outer wall of the outer frame 404. The presence of the spring 407 can push the moving rod 405 to reset. The motor 408 is fixedly connected to the bottom of the inner wall of the bucket arm 1. The semi-gear 409 is installed at the output end of the motor 408. When the motor 408 operates, it can drive the semi-gear 409 to operate. A tooth groove is formed at the bottom of the moving rod 405. The semi-gear 409 meshes with the tooth groove. When the semi-gear 409 operates, it can drive the moving rod 405 to move through the tooth groove, thereby adjusting the position of the clamping block 406.

[0035] By setting the clamping block 406 and the semi-gear 409, after the position of the extension rod 2 is adjusted, by controlling the operation of the motor 408, the motor 408 drives the semi-gear 409 to rotate. Due to the unique shape of the semi-gear 409, when the semi-gear 409 rotates to a certain angle, the semi-gear 409 will separate from the moving rod 405. At this time, the spring 407 installed inside the outer frame 404 will lose the external force restriction and generate a spring-back restoration. When the spring 407 is restored, it will push the moving rod 405 to move, causing the moving rod 405 to drive the clamping block 406 to move, and the clamping block 406 penetrates the inner wall of the extension rod 2 and extends to the outer wall of the extension rod 2, so that the clamping block 406 limits the extension rod 2 to ensure the stability of the extension rod 2 after the adjustment is completed.

[0036] During use, by controlling the operation of the hydraulic push rod 403, the hydraulic push rod 403 drives the push plate 402 to move. Since the outer wall of the push plate 402 is fixedly connected to the inner wall of the extension rod 2, when the push plate 402 moves, it will drive the extension rod 2 to move. Since the outer wall of the limit rod 401 is slidably connected to the inner wall of the extension rod 2, when the extension rod 2 moves, it will slide on the outer wall of the limit rod 401. The movement trajectory of the extension rod 2 can be limited by the limit rod 401. After the position adjustment of the extension rod 2 is completed, the operation of the motor 408 can be controlled to make the motor 408 drive the half gear 409 to rotate. Due to the special shape of the half gear 409, when the half gear 409 rotates to a certain angle, it will separate from the moving rod 405. At this time, the spring 407 will push the moving rod 405, so that the clamping block 406 penetrates the extension rod 2 to complete the position limit of the extension rod 2.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boom device for a hydraulic excavator, comprising a boom (1) and an extension rod (2) arranged on the outer wall of the boom (1), wherein the inner wall of the extension rod (2) is slidably connected to the outer wall of the boom (1), and a connecting piece (3) arranged on the outer wall of the extension rod (2), characterized in that: An extension component (4) is arranged inside the extension rod (2); The extension assembly (4) is composed of a pushing unit, a limiting unit and an auxiliary unit, wherein the pushing unit is located inside the extension rod (2), the limiting unit is located inside the extension rod (2), and the auxiliary unit is located inside the arm (1); The pushing unit comprises a limiting rod (401), a pushing plate (402) and a hydraulic pushing rod (403); the limiting rod (401) is mounted on the inner wall of the extension rod (2); the pushing plate (402) is fixedly connected to the inner wall of the extension rod (2); and the hydraulic pushing rod (403) is mounted on the outer wall of the pushing plate (402).

2. The boom device of a hydraulic excavator according to claim 1, characterized in that: The outer wall of the limit rod (401) is fixedly connected to the outer wall of the boom (1) and is slidably connected to the inner wall of the extension rod (2); the hydraulic push rod (403) is located inside the boom (1) and is fixedly connected to the inner wall of the boom (1).

3. The boom device of a hydraulic excavator according to claim 1, characterized in that: The limiting unit comprises an outer frame (404), a movable rod (405) and a clamping block (406); the outer frame (404) is fixedly connected to the inner wall of the bucket rod (1); the movable rod (405) is slidably connected to the temporal part of the outer frame (404); and the clamping block (406) is clamped to the inside of the extension rod (2).

4. The boom device of a hydraulic excavator according to claim 3, characterized in that: The movable rod (405) penetrates the boom (1) and extends to the outside of the boom (1); the outer wall of the movable rod (405) is slidably connected to the inner wall of the boom (1) penetrated by the movable rod (405); a notch is provided inside the extension rod (2); the outer wall of the clamping block (406) is fixedly connected to the outer wall of the movable rod (405); and the clamping block (406) is clamped in the notch.

5. The boom device of a hydraulic excavator according to claim 1, characterized in that: The auxiliary unit comprises a spring (407), a motor (408) and a half gear (409), wherein the spring (407) is fixedly connected to the outer wall of the moving rod (405), the motor (408) is fixedly connected to the bottom of the inner wall of the bucket arm (1), and the half gear (409) is installed at the output end of the motor (408).

6. The boom device of a hydraulic excavator according to claim 5, characterized in that: The side of the spring (407) away from the moving rod (405) is fixedly connected to the outer wall of the outer frame (404).

7. The boom device of a hydraulic excavator according to claim 5, characterized in that: The bottom of the moving rod (405) is provided with a tooth groove, and the half gear (409) is meshed with the tooth groove.

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