Counterweight assembly of excavator

Abstract

Provided is an excavator counterweight assembly. Relates to the field of excavator accessories. Comprising a fixed body, the fixed body is detachably installed at the tail of the excavator, an installation groove is formed in the side, away from the excavator, of the fixed body, a pair of sliding rails is arranged at the groove bottom of the installation groove, and a movable body is arranged on the sliding rails in a matched mode; the sliding rail extends in the front-back direction of the excavator, and the movable body can slide to the outer side of the mounting groove along the sliding rail. The movable body is pulled to move in the front-back direction of the excavator, the gravity center of the balance weight assembly is adjusted, and it is ensured that the excavator is in a stable working state.

Description

Technical Field

[0001] This application relates to the field of excavator accessories, specifically to an excavator counterweight assembly. Background Technology

[0002] The function of the excavator counterweight is to balance the entire excavator. It is usually installed at the rear of the excavator. As the weight of the entire machine increases, the size and weight of the counterweight will also increase. On large mining excavators, the counterweight used can reach tens of tons.

[0003] Chinese patent document CN219732142U discloses a modular counterweight for an excavator, specifically a main counterweight block. The main counterweight block has a pair of reinforcing mechanisms on both its upper and lower sides. An upper counterweight block and a lower counterweight block are respectively located on the upper and lower sections of the front side of the main counterweight block. Snap-fit ​​grooves are provided on the center of both sides of the main counterweight block, on the upper front of the upper counterweight block, and on the lower front of the lower counterweight block. Snap-fit ​​blocks are fixedly connected to the upper rear of the upper counterweight block and the lower rear of the lower counterweight block. Mounting bolts are provided through the four corners of the main counterweight block. This utility model allows for the direct and individual removal or installation of multiple counterweight components, facilitating counterweight adjustment for the excavator.

[0004] However, the aforementioned patent requires the use of a crane to disassemble and assemble the counterweight, which is not very flexible. Moreover, after disassembly, the center of gravity of the counterweight is prone to shift in the left and right directions, affecting the overall stability of the excavator. Utility Model Content

[0005] In order to overcome the problems of existing counterweights having difficulty in weight adjustment and easily reducing the stability of excavators, this application provides an excavator counterweight assembly.

[0006] This application adopts the following technical solution: an excavator counterweight assembly, including a fixed body, the fixed body being detachably installed at the rear of the excavator, the fixed body having a mounting groove on the side away from the excavator, the bottom of the mounting groove having a pair of slide rails, and a movable body being adaptedly provided on the slide rails;

[0007] The slide rail extends along the front-rear direction of the excavator, and the movable body can slide along the slide rail to the outside of the mounting slot.

[0008] Optionally, the mounting groove extends through the side of the fixed body away from the excavator, one end of the slide rail contacts the inner wall of the mounting groove, the other end of the slide rail extends to the outer side of the mounting groove, and the bottom of the movable body is provided with a pair of slide grooves, which are respectively and correspondingly fitted onto the outer side of the pair of slide rails.

[0009] Optionally, the fixed body has a first through hole on the side facing the excavator, and the movable body has a second through hole. The first through hole and the second through hole are coaxially arranged and both are parallel to the slide rail.

[0010] A limiting post is inserted into the first and second through holes. A limiting plate is provided at the end of the limiting post near the excavator. The limiting plate abuts against the outer wall of the fixed body.

[0011] The end face of the limiting post away from the excavator is threaded with a lead screw, and a turntable is threaded on the lead screw. A sliding sleeve is fitted at the end of the turntable, and the sliding sleeve is connected to the movable body by a pair of traction ropes.

[0012] Optionally, a bearing is provided between the sliding sleeve and the turntable, and the inner wall of the sliding sleeve and the outer wall of the lead screw are either fitted together or separated.

[0013] Optionally, when the movable body is fully located within the mounting slot, the end of the limiting post away from the excavator is located on the outside of the movable body.

[0014] Optionally, the movable body is provided with a pair of connecting rings, which are symmetrically arranged on both sides of the limiting post. One end of the traction rope is connected to the sliding sleeve, and the other end of the traction rope is wound around the connecting rings.

[0015] Compared with existing technologies, this application utilizes the lever principle to move the movable body along the front-to-back direction of the excavator with less effort, thereby adjusting the center of gravity of the counterweight assembly. This eliminates the need to disassemble or install additional counterweights, simplifies operation, and prevents the excavator from shifting its center of gravity in the left-to-right direction, ensuring the excavator remains in a stable working state. Attached Figure Description

[0016] Figure 1 This is a schematic perspective view of this application;

[0017] Figure 2 This is a reference diagram of the operational state of this application;

[0018] Figure 3 This is a reference diagram of the explosion state of this application;

[0019] In the diagram: 1. Fixed body; 11. Mounting groove; 12. Slide rail; 13. First through hole; 2. Movable body; 21. Slide groove; 22. Second through hole; 23. Connecting ring; 3. Limiting post; 30. Limiting plate; 4. Lead screw; 41. Turntable; 42. Sliding sleeve; 43. Traction rope. Detailed Implementation

[0020] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0021] like Figure 1-3 As shown, the excavator counterweight assembly includes a fixed body 1, which is detachably installed at the rear of the excavator. The fixed body 1 has a mounting groove 11 on the side away from the excavator. A pair of slide rails 12 are provided at the bottom of the mounting groove 11, and a movable body 2 is adapted to be provided on the slide rails 12. The slide rails 12 extend along the front-rear direction of the excavator, and the movable body 2 can slide along the slide rails 12 to the outside of the mounting groove 11.

[0022] By changing the position of the movable body 2 within the mounting slot 11, the center of gravity of the counterweight assembly in the front-to-back direction of the excavator can be shifted, thus achieving the purpose of adjusting the counterweight effect without additional disassembly and assembly of the counterweight components. Furthermore, since the movable body 2 only changes the center of gravity of the counterweight in the front-to-back direction of the excavator, it has no effect on the center of gravity in the left-to-right direction of the excavator, and therefore will not affect the stability of the excavator during operation.

[0023] The mounting groove 11 penetrates the side of the fixed body 1 away from the excavator. One end of the slide rail 12 contacts the inner wall of the mounting groove 11, and the other end of the slide rail 12 extends to the outside of the mounting groove 11. The bottom of the movable body 2 is provided with a pair of slide grooves 21, which are respectively and correspondingly fitted onto the outside of the pair of slide rails 12. The mounting groove 11 is set in an open state to ensure that when the movable body 2 slides along the front and rear direction of the excavator, the distance between the movable body 2 and the excavator can be reliably changed, thereby achieving the effect of adjusting the center of gravity of the counterweight.

[0024] The fixed body 1 has a first through hole 13 on the side facing the excavator, and the movable body 2 has a second through hole 22. The first through hole 13 and the second through hole 22 are coaxially arranged and are parallel to the slide rail 12. A limiting post 3 is inserted into the first through hole 13 and the second through hole 22. A limiting plate 30 is provided at the end of the limiting post 3 near the excavator. The limiting plate 30 abuts against the outer wall of the fixed body 1. A lead screw 4 is screwed onto the end face of the limiting post 3 away from the excavator. A turntable 41 is screwed onto the lead screw 4. A sliding sleeve 42 is fitted onto the end of the turntable 41. The sliding sleeve 42 is connected to the movable body 2 by a pair of traction ropes 43.

[0025] Rotating the turntable 41 allows it to move away from the excavator. At this time, the sliding sleeve 42 moves along the axis of the lead screw 4. The rotation and movement of the turntable 41 drive the sliding sleeve 42 to move, and the sliding sleeve 42 does not rotate during this movement. Furthermore, the limiting post 3 and the movable body 2 are in a sliding fit, and the limiting post 3 cannot move under the limiting action of the limiting plate 30. Thus, as the turntable 41 and sliding sleeve 42 gradually move away from the movable body 2, the movable body 2 will move towards the outside of the mounting groove 11 under the pulling action of the traction rope 43. This means the movable body 2 can gradually move away from the excavator, thereby changing the center of gravity of the counterweight assembly. By selecting a turntable 41 of appropriate size, pulling the movable body 2 can be accomplished with relatively little effort.

[0026] A bearing is provided between the sliding sleeve 42 and the turntable 41. The inner wall of the sliding sleeve 42 is either in contact with or separate from the outer wall of the lead screw 4. In this way, when the turntable 41 rotates, the sliding sleeve 42 will not rotate. When the turntable 41 moves, the sliding sleeve 42 can move accordingly, thereby cooperating with the limiting post 3 and the limiting plate 30 to achieve the pulling effect on the moving body 2, ensuring that the traction rope 43 will not get tangled and affect the pulling of the moving body 2.

[0027] When the movable body 2 is fully within the mounting groove 11, the end of the limiting post 3 furthest from the excavator is located outside the movable body 2. This means the movable body 2 will not completely move outside the mounting groove 11, facilitating its repositioning. Furthermore, a small portion of the slide rail 12 is located outside the mounting groove 11, maximizing the displacement of the movable body 2 while preventing excessive length of the slide rail 12 outside the mounting groove 11, thus avoiding an increased risk of collision or scraping.

[0028] The movable body 2 is equipped with a pair of connecting rings 23, which are symmetrically arranged on both sides of the limiting post 3. One end of the traction rope 43 is connected to the sliding sleeve 42, and the other end of the traction rope 43 is wound around the connecting ring 23. When there is no need to adjust the center of gravity of the counterweight assembly, the lead screw 4 can be unscrewed from the limiting post 3. This avoids the counterweight assembly structure becoming too complex and affecting the excavator's operating space, and also prevents damage to components such as the lead screw 4 or the turntable 41 from being constantly mounted on the outside of the movable body 2. When it is necessary to move the movable body 2 to adjust the center of gravity of the counterweight assembly, simply screw the lead screw 4 onto the limiting post 3, then wound the traction rope 43 around the connecting ring 23, ensuring the traction rope 43 is taut to reduce play.

[0029] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. An excavator counterweight assembly, comprising a fixed body (1), said fixed body (1) being detachably mounted at the rear of the excavator, characterized in that, The fixed body (1) is provided with a mounting groove (11) on the side away from the excavator. A pair of slide rails (12) are provided at the bottom of the mounting groove (11). A movable body (2) is adapted to be provided on the slide rails (12). The slide rail (12) extends along the front-rear direction of the excavator, and the movable body (2) can slide along the slide rail (12) to the outside of the mounting groove (11).

2. The excavator counterweight assembly according to claim 1, characterized in that, The mounting groove (11) passes through the side of the fixed body (1) away from the excavator. One end of the slide rail (12) contacts the inner wall of the mounting groove (11), and the other end of the slide rail (12) extends to the outside of the mounting groove (11). The bottom of the movable body (2) is provided with a pair of slide grooves (21), and the pair of slide grooves (21) are respectively and correspondingly fitted on the outside of the pair of slide rails (12).

3. The excavator counterweight assembly according to claim 2, characterized in that, The fixed body (1) has a first through hole (13) on the side facing the excavator, and the movable body (2) has a second through hole (22). The first through hole (13) and the second through hole (22) are coaxially arranged and are both parallel to the slide rail (12). A limiting post (3) is inserted into the first perforation (13) and the second perforation (22). A limiting plate (30) is provided at the end of the limiting post (3) near the excavator. The limiting plate (30) abuts against the outer wall of the fixing body (1). The end face of the limiting post (3) away from the excavator is threaded with a lead screw (4), and a turntable (41) is threaded on the lead screw (4). A sliding sleeve (42) is fitted on the end of the turntable (41), and the sliding sleeve (42) is connected to the movable body (2) by a pair of traction ropes (43).

4. The excavator counterweight assembly according to claim 3, characterized in that, A bearing is provided between the sliding sleeve (42) and the turntable (41), and the inner wall of the sliding sleeve (42) and the outer wall of the lead screw (4) are either in contact with or separate from each other.

5. The excavator counterweight assembly according to claim 3, characterized in that, When the movable body (2) is completely located within the mounting groove (11), the end of the limiting post (3) away from the excavator is located outside the movable body (2).

6. The excavator counterweight assembly according to claim 4, characterized in that, The movable body (2) is provided with a pair of connecting rings (23), which are symmetrically arranged on both sides of the limiting post (3). One end of the traction rope (43) is connected to the sliding sleeve (42), and the other end of the traction rope (43) is wound around the connecting rings (23).

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