Connecting device of electric shovel bucket opening chain

Abstract

The utility model relates to the field of electric shovels, in particular to an electric shovel bucket opening chain connecting device which comprises a bucket, a bottom opening bucket rotationally mounted on the inner wall of the bucket, an iron chain connected with the bottom opening bucket and a mounting mechanism arranged on the face, away from the bucket, of the bottom opening bucket. The connecting mechanism is used for connecting the iron chain and the mounting mechanism; the mounting mechanism comprises a mounting rod arranged on the bottom open hopper, a mounting block connected with the mounting rod, a sliding block arranged in the mounting block and a force application mechanism arranged between the sliding block and the mounting block. The electric shovel has the effects of reducing abrasion of the electric shovel and saving the maintenance cost.

Description

Technical Field

[0001] This application relates to the field of electric shovels, and more particularly to a connecting device for the bucket chain of an electric shovel. Background Technology

[0002] An electric shovel is a single-bucket mechanical excavator driven by electricity. It achieves its digging action through mechanical transmission components such as gears, chains, and cable pulleys. It is primarily used for earthmoving and loading operations in open-pit mines. Its core function is to efficiently complete high-intensity mining tasks in large mines (such as coal and iron mines), offering advantages such as high productivity and low operating costs. It is also commonly used for excavating, mixing, and transporting materials such as soil, sand, and gravel. It is a common piece of machinery in construction sites, agriculture, and horticulture, significantly improving work efficiency and reducing labor intensity. An electric shovel typically consists of an electric motor, bucket, control system, and frame.

[0003] When using an electric shovel, the bottom bucket is usually pulled by a chain to discharge material. The bottom of the bucket is fixedly equipped with an installation rod, and an installation block is fixedly installed at one end of the chain. During installation, the installation block is usually placed on the surface of the installation rod, and a limit nut is placed on one end of the installation rod to limit the installation block on the surface of the installation rod. During use, the drive mechanism of the electric shovel pulls the chain, causing the installation block to come into contact with the surface of the limit nut. Over time, this will cause the limit nut to wear. Utility Model Content

[0004] To reduce wear on electric shovels and save on maintenance costs, this application provides a connecting device for the bucket chain of an electric shovel.

[0005] This application provides a connecting device for the bucket chain of an electric shovel, which adopts the following technical solution:

[0006] A connecting device for an electric shovel bucket chain includes a bucket, a bottom bucket rotatably mounted on the inner wall of the bucket, an iron chain connected to and mounted on the bottom bucket, a mounting mechanism disposed on the side of the bottom bucket away from the bucket, and a connecting mechanism for connecting the iron chain and the mounting mechanism.

[0007] The installation mechanism includes an installation rod disposed on the bottom opening, an installation block connected to the installation rod, a sliding block disposed within the installation block, and a force-applying mechanism disposed between the sliding block and the installation block.

[0008] By adopting the above technical solution, when in use, the user slides both the mounting block and the sliding block onto the surface of the mounting rod, and installs one end of the iron chain onto one end of the mounting block through the connecting mechanism. During use, when the iron chain is pulled, the mounting block will not hit the limit nut under the action of the force application mechanism, thereby avoiding the limit nut from falling off under the impact of the mounting block, and effectively improving the service life of the limit nut.

[0009] The force-applying mechanism can automatically compensate for the deformation of the chain caused by wear or stress, ensuring that the connection always maintains stable tension and avoiding the problem of loosening or breaking of traditional rigid connections. The installation mechanism is integrated into the outside of the bottom bucket, avoiding the occupation of the internal space of the bucket, which not only ensures the bucket capacity but also reduces the overall weight and improves the mobility of the equipment. The limiting structure of the installation rod and the sliding block ensures that the chain connection position is fixed. With the pre-tension of the force-applying mechanism, it effectively prevents the chain from accidentally falling off during operation and improves safety.

[0010] Preferably, both the mounting block and the sliding block are slidably sleeved on the mounting rod, and the sliding block is installed inside the mounting block by the force-applying mechanism, which pulls the mounting block.

[0011] By adopting the above technical solution, when the bucket is unloading, the rigid connection is prone to chain breakage or pin deformation due to sudden load changes. The sliding block can slide along the mounting rod, and the instantaneous impact load is absorbed by the elastic deformation of the force application mechanism, avoiding the sudden increase in stress caused by the rigid connection. The chain tension is transmitted to the force application mechanism through the sliding block, and then the force application mechanism pulls the mounting block, so that the load is evenly distributed on both sides of the mounting rod, avoiding the bending or wear of the rod body caused by single-point force. At the same time, the slight sliding of the sliding block in the mounting block can dissipate high-frequency vibration energy and suppress the transmission of vibration caused by uneven ground or material impact to the bucket body during electric shovel operation, reducing the risk of resonance.

[0012] Preferably, it further includes a limiting mechanism that restricts the sliding block on the mounting rod, the limiting mechanism including a mounting threaded rod inserted into the sliding block.

[0013] By adopting the above technical solution, the electric shovel will generate greater vibration and impact force during operation. The installation threaded rod is inserted into the sliding block and cooperates with the mounting rod, which can effectively prevent the sliding block from sliding randomly on the mounting rod, ensure the stability of the sliding block's position during operation, avoid chain slack or excessive tension due to sliding block displacement, and ensure the normal operation of the bucket chain connection device.

[0014] Preferably, the threaded rod is inserted into the mounting rod, and a mounting nut for fixing the threaded rod is fitted onto the threaded rod.

[0015] By adopting the above technical solution, the threaded rod can be inserted into the mounting rod to accurately position the sliding block in the axial direction, preventing the sliding block from sliding randomly along the mounting rod during operation, ensuring that the chain is always in a proper tension state, and avoiding chain slack or over-tension due to the displacement of the sliding block, thereby ensuring the stable operation of the electric shovel bucket chain system.

[0016] Preferably, a limiting tube is fixedly installed at the end of the mounting rod away from the bottom opening, and a limiting nut is threaded onto the surface of the fiber tube.

[0017] By adopting the above technical solution, the limiting tube, as a rigid component fixed to the end of the mounting rod, directly limits the axial movement limit of the mounting block and the sliding block, preventing them from slipping off the rod due to chain overload tension or vibration impact.

[0018] Preferably, a rubber sleeve is provided between the limiting tube and the limiting nut.

[0019] By adopting the above technical solution, the electric shovel will generate a large amount of vibration and impact during operation. The rubber sleeve has good elasticity and flexibility, which can effectively absorb and buffer these vibrations and impacts, reduce the rigid collision between the limit nut and the limit tube, reduce the wear and loosening of parts caused by vibration, extend the service life of the entire connection device, and reduce the impact on other components.

[0020] Preferably, the force-applying mechanism includes a rotating ring and a spring, the rotating ring being rotatably sleeved on the sliding block, and the spring being located between the mounting block and the mounting nut.

[0021] By adopting the above technical solution, the rotating ring is rotatably sleeved on the sliding block, allowing the rotating ring to rotate flexibly relative to the sliding block when the chain is under force. This adapts to changes in the chain's tension in different directions, avoiding localized stress concentration caused by minor deviations in the chain's tension direction. The spring is located between the mounting block and the mounting nut, and its elastic properties enable adaptive adjustment of the chain's tension. When the chain is subjected to a large tension, the spring is compressed, absorbing some energy and mitigating the instantaneous impact force on the chain, preventing the chain from breaking due to overload. When the chain tension decreases, the spring returns to its original shape, maintaining the chain at an appropriate tension.

[0022] Preferably, there are at least two rotating rings and two springs, with the two springs sleeved on the mounting rod. One end of each spring is fixed to the mounting block, and the end of the spring away from the mounting block is connected to the outside of the rotating ring.

[0023] By adopting the above technical solution, when the chain is under force, the rotating rings at different positions can rotate independently to adjust the direction, so as to transmit the tension more evenly to the sliding block and the mounting rod, avoid local stress concentration, and reduce the wear and damage of components caused by uneven force. The two springs are symmetrically arranged on the mounting rod, so that the chain tension is more evenly distributed on the mounting block, preventing the mounting block from tilting or shifting, ensuring the stability and accuracy of the bucket opening action, and making the electric shovel work more smoothly.

[0024] Preferably, the connecting mechanism includes a connecting sleeve and a slot formed on the connecting sleeve, and the iron chain is placed in the slot.

[0025] By adopting the above technical solution, the slot provides a precisely fitted placement space for the chain, which can effectively fix the chain on the connecting sleeve and ensure that the chain will not easily come off during operation. The slot design can reduce friction and wear between the chain and the connecting sleeve, and extend the service life of the chain. At the same time, the shape and size of the slot can be set according to the specifications of the chain to ensure a good fit between the two.

[0026] Preferably, the chain and the connecting sleeve are rotatably connected through the slot, and the end of the connecting sleeve away from the chain is rotatably connected to the mounting block.

[0027] By adopting the above technical solution, during the operation of the electric shovel, the bucket-opening action involves forces in multiple directions and complex motion trajectories. The chain and connecting sleeve are connected by a slot, allowing the chain to rotate flexibly at different angles and adapt to dynamic changes in the direction of tension. The rotating connection between the connecting sleeve and the mounting block further enhances the flexibility of the connection part, enabling the entire connection device to better adapt to different motion states during the bucket-opening process of the electric shovel. This avoids jamming or malfunctions caused by interference between components, improving the operating efficiency and stability of the electric shovel. At the same time, at the moment the bucket is opened, the chain will bear a large impact load. The rotating connection structure can play a buffering role, dispersing and absorbing the impact load, reducing damage to components.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. During use, the user slides both the mounting block and the sliding block onto the surface of the mounting rod. One end of the chain is then attached to one end of the mounting block via the connecting mechanism. During use, when the chain is pulled, the mounting block will not collide with the limit nut under the action of the force-applying mechanism, thus preventing the limit nut from falling off due to the impact of the mounting block. This effectively improves the service life of the limit nut and fully demonstrates the practicality of the device.

[0030] 2. The design of the sliding block and mounting block allows the chain to be quickly connected or disconnected by sliding without the need for bolts or other fasteners, significantly improving maintenance efficiency and reducing downtime. The force-applying mechanism automatically compensates for chain deformation caused by wear or stress, ensuring that the connection always maintains stable tension and avoiding the problems of loosening or breaking that are common with traditional rigid connections. The mounting mechanism is integrated into the outside of the bottom bucket, avoiding the occupation of the bucket's internal space, ensuring bucket capacity while reducing overall weight and improving equipment mobility. The limiting structure of the mounting rod and sliding block ensures that the chain connection position is fixed, and together with the pre-tension of the force-applying mechanism, it effectively prevents the chain from accidentally falling off during operation, improving safety. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the connecting device of the electric shovel bucket chain in the embodiments of this application;

[0032] Figure 2 This is a cross-sectional structural diagram illustrating the connecting device of the electric shovel bucket chain;

[0033] Figure 3 This is a partially enlarged schematic diagram showing the cross-section of the connecting device of the electric shovel bucket chain;

[0034] Figure 4 This is a partial structural side view of the connecting device of the electric shovel bucket chain.

[0035] Explanation of reference numerals in the attached drawings: 1. Bucket; 2. Bottom-opening bucket; 3. Mounting rod; 4. Mounting block; 5. Sliding block; 6. Force-applying mechanism; 601. Rotating ring; 602. Spring; 7. Chain; 8. Connecting mechanism; 801. Connecting sleeve; 802. Groove; 9. Limiting mechanism; 901. Mounting threaded rod; 902. Mounting nut; 10. Limiting nut; 11. Limiting tube; 12. Rubber sleeve. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0037] This application discloses a connecting device for an electric shovel bucket chain. The connecting device includes a bucket 1, a bottom bucket 2, a chain 7, a mounting mechanism, a connecting mechanism 8, and a limiting mechanism 9. The bottom bucket 2 is rotatably mounted on the inner wall of the bucket 1. The chain 7 is connected to the bottom bucket 2. The mounting mechanism is located on the side of the bottom bucket 2 away from the bucket 1. The connecting mechanism 8 connects the chain 7 and the mounting mechanism. In use, the chain 7 pulls the bottom bucket 2, causing it to rotate and open, releasing material from the bucket 1.

[0038] The connecting mechanism 8 includes a connecting sleeve 801 and a slot 802 formed on the connecting sleeve 801, with one end of the chain 7 passing through the slot 802. The slot 802 fixes the chain 7 to the connecting sleeve 801, ensuring that the chain 7 will not easily detach during operation. The shape and size of the slot 802 can be set according to the specifications of the chain 7 to ensure a good fit between the two. The chain 7 and the connecting sleeve 801 are rotatably connected through the slot 802, and the end of the connecting sleeve 801 away from the chain 7 is rotatably connected to the installation mechanism. During operation, the bucket-opening action of an electric shovel involves forces in multiple directions and complex motion trajectories. The chain 7 and the connecting sleeve 801 are rotatably connected through the slot 802, allowing the chain 7 to rotate flexibly at different angles and adapt to dynamic changes in the direction of tension. The rotatable connection between the connecting sleeve 801 and the installation mechanism enables the entire connection device to better adapt to different motion states during the bucket-opening process of the electric shovel. At the same time, at the moment the bucket is opened, the chain 7 will bear a large impact load. The rotatable connection structure can play a buffering role, dispersing and absorbing the impact load, and reducing damage to components.

[0039] The mounting mechanism includes a mounting rod 3 mounted on the bottom bucket 2, a mounting block 4 connected to the mounting rod 3, a sliding block 5 disposed within the mounting block 4, and a force-applying mechanism 6 disposed between the sliding block 5 and the mounting block 4. In an optional embodiment, both the mounting block 4 and the sliding block 5 are slidably fitted onto the mounting rod 3. The sliding block 5 is mounted inside the mounting block 4 via the force-applying mechanism 6, which pulls the mounting block 4. When the bucket 1 unloads material, the rigid connection is prone to chain breakage or pin deformation due to sudden load changes. The sliding block 5 can slide along the mounting rod 3, absorbing instantaneous impact loads through the elastic deformation of the force-applying mechanism 6, thus avoiding a sudden increase in stress caused by the rigid connection. The chain tension is transmitted to the force-applying mechanism 6 through the sliding block 5, and then the force-applying mechanism 6 pulls the mounting block 4, so that the load is evenly distributed on both sides of the mounting rod 3, avoiding bending or wear of the rod body caused by single-point force. At the same time, the slight sliding of the sliding block 5 within the mounting block 4 can dissipate high-frequency vibration energy and suppress the transmission of vibrations caused by uneven ground or material impact to the bucket 1 body during electric shovel operation, reducing the risk of resonance.

[0040] The limiting mechanism 9 restricts the sliding block 5 onto the mounting rod 3. The limiting mechanism 9 includes a threaded mounting rod 901 inserted into the sliding block 5. During operation, the electric shovel generates significant vibration and impact. The threaded mounting rod 901, inserted into the sliding block 5 and cooperating with the mounting rod 3, effectively prevents the sliding block 5 from sliding freely on the mounting rod 3, ensuring the stability of the sliding block 5's position during operation. This avoids chain slackness or over-tensioning due to displacement of the sliding block 5, ensuring the normal operation of the bucket chain connection device. Simultaneously, by changing the insertion depth or position of the threaded mounting rod 901 within the sliding block 5, the position of the sliding block 5 on the mounting rod 3 can be precisely adjusted. That is, the chain tension can be precisely adjusted according to actual working needs, such as the different chain tensions required when excavating different materials, ensuring the electric shovel is always in optimal working condition and improving operational efficiency.

[0041] Optionally, the threaded rod 901 is inserted into the mounting rod 3, and a mounting nut 902 is fitted onto the threaded rod 901 for fixing it. A limit tube 11 is fixedly installed at the end of the mounting rod 3 away from the bottom bucket 2, and a limit nut 10 is threaded onto the surface of the fiber tube. The insertion of the threaded rod 901 into the mounting rod 3 can accurately position the sliding block 5 axially, preventing the sliding block 5 from sliding arbitrarily along the mounting rod 3 during operation, ensuring that the chain is always in a proper tension state, and avoiding chain slack or over-tension due to displacement of the sliding block 5, thereby ensuring the stable operation of the electric shovel bucket chain system.

[0042] During operation, the electric shovel generates significant vibration and impact forces. The tightening action of the mounting nut 902 effectively resists these external forces, ensuring the reliability of the connection between the threaded rod and the mounting rod 3, and preventing equipment malfunctions and safety accidents caused by loosening or detachment. The limiting tube 11, as a rigid component fixed to the end of the mounting rod 3, directly restricts the axial movement limits of the mounting block 4 and the sliding block 5, preventing them from slipping off the rod body due to chain overload or vibration impact. The limiting nut 10 moves along the surface of the limiting tube 11 via its thread, precisely setting the maximum sliding distance of the mounting block 4. This preserves the elastic adjustment space of the force application mechanism 6 while mechanically limiting the movement of the slider to prevent chain slack or jamming caused by excessive slider movement. Preferably, the limiting tube 11 is coaxially arranged with the mounting rod 3 to avoid occupying the bottom space of the bucket 1, ensuring smooth material passage during unloading.

[0043] In an optional embodiment, a rubber sleeve 12 is provided between the limiting tube 11 and the limiting nut 10. During operation, the electric shovel generates significant vibration and impact forces. The rubber sleeve 12, with its good elasticity and flexibility, effectively absorbs and buffers these vibrations and impacts, reducing rigid collisions between the limiting nut 10 and the limiting tube 11, minimizing wear and loosening of components caused by vibration, extending the service life of the entire connection device, and reducing the impact on other components. Simultaneously, the presence of the rubber sleeve 12 increases the friction between the limiting nut 10 and the limiting tube 11. In the vibrating environment of electric shovel operation, this friction effectively prevents the limiting nut 10 from loosening due to vibration, avoiding problems such as changes in chain tension or alterations in the position of the sliding block 5 caused by a loosening of the limiting nut 10.

[0044] In an optional embodiment, the chain mechanism includes a rotating ring 601 and a spring 602. The rotating ring 601 is rotatably mounted on the sliding block 5, and the spring 602 is located between the mounting block 4 and the mounting nut 902. At least two rotating rings 601 and two springs 602 are provided, with both springs 602 mounted on the mounting rod 3. One end of each spring 602 is fixed to the mounting block 4, and the end of the spring 602 away from the mounting block 4 is connected to the outside of the rotating ring 601. When the chain is under stress, the rotating rings 601 at different positions can rotate independently to adjust their direction, transmitting the tension more evenly to the sliding block 5 and the mounting rod 3, avoiding localized stress concentration, and reducing wear and damage to components caused by uneven stress.

[0045] In a preferred embodiment, two springs 602 are symmetrically arranged on the mounting rod 3. The symmetrical arrangement of the two springs 602 ensures a more balanced distribution of chain tension on the mounting block 4, preventing tilting or offset of the mounting block 4, guaranteeing the stability and accuracy of the bucket-opening action, and making the electric shovel's operation smoother and more efficient. The two springs 602 also increase the elasticity adjustment capability. When the chain is subjected to a large tension, both springs 602 can be compressed simultaneously, absorbing more energy, effectively buffering impact force, and reducing the risk of chain breakage; when the tension decreases, the springs 602 can more effectively restore the chain to a suitable tension state, ensuring that the chain always maintains good working performance.

[0046] The implementation principle of this application embodiment is as follows: When in use, the user slides the mounting block 4 and the sliding block 5 onto the surface of the mounting rod 3. After the position of the sliding block 5 is restricted to the surface of the mounting rod 3 by the limiting mechanism 9, one end of the iron chain 7 is installed on one end of the mounting block 4 by the connecting mechanism 8. During use, when the drive mechanism of the electric shovel pulls the iron chain 7, the mounting block 4 will not hit the surface of the limiting nut 10 under the action of the force application mechanism 6, thereby avoiding the situation where the limiting nut 10 falls off under the impact of the mounting block 4, effectively improving the service life of the limiting nut 10 and fully demonstrating the practicality of the device.

[0047] 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 connecting device for an electric shovel bucket chain, characterized in that, It includes a bucket (1), a bottom opening bucket (2) rotatably mounted on the inner wall of the bucket (1), an iron chain (7) connected and mounted to the bottom opening bucket (2), a mounting mechanism disposed on the side of the bottom opening bucket (2) away from the bucket (1), and a connecting mechanism (8) for connecting the iron chain (7) and the mounting mechanism; The installation mechanism includes an installation rod (3) disposed on the bottom opening (2), an installation block (4) connected to the installation rod (3), a sliding block (5) disposed in the installation block (4), and a force application mechanism (6) disposed between the sliding block (5) and the installation block (4).

2. The connecting device for the electric shovel bucket chain according to claim 1, characterized in that: The mounting block (4) and the sliding block (5) are both slidably sleeved on the mounting rod (3). The sliding block (5) is installed inside the mounting block (4) through the force application mechanism (6). The force application mechanism (6) pulls the mounting block (4).

3. The connecting device for the electric shovel bucket chain according to claim 2, characterized in that: It also includes a limiting mechanism (9) that restricts the sliding block (5) on the mounting rod (3), and the limiting mechanism (9) includes a mounting threaded rod (901) inserted into the sliding block (5).

4. The connecting device for the electric shovel bucket chain according to claim 3, characterized in that: The mounting threaded rod (901) is inserted into the mounting rod (3), and a mounting nut (902) for fixing the mounting threaded rod (901) is sleeved on the mounting threaded rod (901).

5. The connecting device for the electric shovel bucket chain according to claim 4, characterized in that: A limiting tube (11) is fixedly installed at one end of the mounting rod (3) away from the bottom opening (2), and a limiting nut (10) is threaded onto the surface of the limiting tube.

6. The connecting device for the electric shovel bucket chain according to claim 5, characterized in that: A rubber sleeve (12) is provided between the limiting tube (11) and the limiting nut (10).

7. The connecting device for the electric shovel bucket chain according to claim 4, characterized in that: The force-applying mechanism (6) includes a rotating ring (601) and a spring (602). The rotating ring (601) is rotatably sleeved on the sliding block (5), and the spring (602) is located between the mounting block (4) and the mounting nut (902).

8. The connecting device for the electric shovel bucket chain according to claim 7, characterized in that: At least two rotating rings (601) are provided, and two springs (602) are provided. The two springs (602) are sleeved on the mounting rod (3). One end of the spring (602) is fixed to the mounting block (4), and the end of the spring (602) away from the mounting block (4) is connected to the outside of the rotating ring (601).

9. The connecting device for the electric shovel bucket chain according to claim 1, characterized in that: The connecting mechanism (8) includes a connecting sleeve (801) and a slot (802) opened on the connecting sleeve (801), and the iron chain (7) is placed in the slot (802).

10. The connecting device for the electric shovel bucket chain according to claim 9, characterized in that: The iron chain (7) and the connecting sleeve (801) are rotatably connected through the slot (802), and the end of the connecting sleeve (801) away from the iron chain (7) is rotatably connected to the mounting block (4).

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