An adjustable counterweight for a mining machine

Abstract

The utility model discloses an adjustable counterweight for mine machinery relates to mine machinery technical field. The counterweight includes fixed counterweight, movable counterweight and pivot. Fixed counterweight and movable counterweight are half circle structure and are adjacent setting, and fixed counterweight is fixed in pivot, and movable counterweight can rotate around pivot. On the end face opposite fixed counterweight and movable counterweight, along the circumferential direction equal interval is equipped with a plurality of clamping holes, and on the corresponding end face of movable counterweight is equipped with an elastic clamping piece, and the elastic clamping piece includes installation cavity, guide hole, clamping pin, limit block, spiral spring and pull ring. When adjusting, the pull ring is pulled outwards to make clamping pin retract, and after rotating movable counterweight to target angle, the pull ring is loosened, and spring pushes clamping pin and automatically pops into corresponding clamping hole to complete locking. The utility model has realized the eccentricity adjustment of toolless, fast, graduated accurate, has solved the problem of traditional mode adjustment precision poor, and the operation is complicated.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery technology, specifically an adjustable counterweight for mining machinery. Background Technology

[0002] In the field of mining machinery, equipment such as vibrating screens and feeders typically rely on the centrifugal force generated by eccentric counterweights to drive the equipment to vibrate periodically in order to perform functions such as screening and conveying. To adapt to different material characteristics or process requirements, it is often necessary to adjust the eccentricity of the counterweights to change the magnitude of the vibration force.

[0003] Currently, common adjustable counterweights typically consist of two eccentric blocks, one fixed to a rotating shaft and the other rotatable relative to the fixed block. Adjustment requires first loosening the locking bolts securing the movable eccentric block to the shaft, then manually rotating the movable block to the desired angle based on experience, and finally retightening the bolts. This adjustment method has the following significant drawbacks: 1. Poor adjustment accuracy and reliance on experience: Due to the lack of clear positioning and indication mechanisms, the adjustment angle relies entirely on the operator's experience and visual estimation, making it difficult to achieve precise and repeatable quantitative adjustment, resulting in unstable equipment performance.

[0004] 2. Cumbersome operation and low efficiency: Each adjustment requires completely loosening and retightening the high-strength locking bolts. The operation is time-consuming and labor-intensive, and requires the use of professional tools. This is especially inconvenient in mine sites with limited space or complex working conditions, which seriously affects the efficiency of equipment debugging and working condition switching.

[0005] Therefore, we propose an adjustable counterweight for mining machinery. Utility Model Content

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an adjustable counterweight for mining machinery. Through the design of elastic locking and segmented holes, it achieves tool-free, rapid, precise, and quantitative adjustment of the counterweight's eccentricity, improving the efficiency and accuracy of vibration parameter adjustment in mining machinery and effectively solving the problems in the background technology.

[0007] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: an adjustable counterweight for mining machinery, comprising a fixed counterweight, a movable counterweight, and a rotating shaft. A first connecting arm is fixedly installed at the middle of the upper outer surface of the fixed counterweight, and a second connecting arm is fixedly installed at the middle of the upper outer surface of the movable counterweight. The first connecting arm is fixedly installed on the rotating shaft, and the second connecting arm is rotatably mounted on the rotating shaft. The fixed counterweight and the movable counterweight are arranged adjacent to each other. On the end face, multiple snap-fit ​​holes are evenly spaced along its circumference; on the corresponding end face of the movable counterweight, an elastic snap-fit ​​element is provided; the elastic snap-fit ​​element can selectively engage with any of the snap-fit ​​holes to achieve rapid positioning and locking of the movable counterweight at different rotational positions; the elastic snap-fit ​​element includes a mounting cavity, a guide hole, a snap-fit ​​pin, a limiting block, a helical spring, and a pull ring. The mounting cavity is located inside one end of the movable counterweight, and the guide hole is located in the middle of both ends of the mounting cavity, extending through to the surface of the movable counterweight.

[0008] Preferably, the limiting block and the helical spring are both located in the mounting cavity, and the locking pin passes through the guide hole and the mounting cavity.

[0009] Preferably, the pull ring is located on the outside of the movable counterweight block on the side away from the fixed counterweight block, and the pull ring is fixed to the outer surface of one end of the locking pin.

[0010] Preferably, the limiting block is fixed to the outer wall of the middle part of the snap-fit ​​pin, the helical spring is movably sleeved on the outside of the snap-fit ​​pin, and the helical spring is fixed between one side of the outer surface of the limiting block and the end of the mounting cavity near the pull ring.

[0011] Preferably, the outer wall of the locking pin and the guide hole are in a sliding fit, the outer wall of the limiting block and the mounting cavity are in a sliding fit, and one side of the outer surface of the limiting block is elastically connected to the end of the mounting cavity near the pull ring by a helical spring.

[0012] Preferably, one end of the snap-fit ​​pin can be inserted into and snapped into any of the snap-fit ​​holes.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides an adjustable counterweight for mining machinery, which has the following advantages: 1. This adjustable counterweight for mining machinery comprises multiple locking holes arranged at equal intervals along the circumference on the opposite end faces of the fixed and movable counterweights, which cooperate with the elastic locking components on the movable counterweight to form a clear segmentation and positioning mechanism. During operation, simply switching the elastic locking component from one locking hole to an adjacent or designated locking hole allows the movable counterweight to rotate precisely relative to the fixed counterweight by a predetermined phase angle, thereby quantitatively changing the eccentricity of the combined counterweight. This completely overcomes the shortcomings of traditional methods that rely on experience and visual estimation for adjustment, improves the accuracy, repeatability, and consistency of adjustment, and ensures the stability and controllability of vibration parameters in mining machinery (such as vibrating screens).

[0014] 2. This adjustable counterweight for mining machinery requires a traditional adjustment method that necessitates completely loosening and retightening high-strength locking bolts, a cumbersome process requiring specialized tools. This invention employs a spring-driven elastic locking structure (locking pin, helical spring, etc.). During adjustment, simply pull the pull ring outwards by hand to retract the locking pin from the current locking hole against the spring force. Then, manually rotate the movable counterweight to the target position. After releasing the pull ring, the spring drives the locking pin to automatically spring into the corresponding locking hole, completing the locking process. The entire adjustment process is fast and smooth, requiring no tools, simplifying operation, saving adjustment time, and improving the efficiency of equipment debugging and maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an adjustable counterweight for mining machinery according to the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of the fixed counterweight in an adjustable counterweight block for mining machinery according to the present invention.

[0017] Figure 3 This is a schematic diagram of the movable counterweight in an adjustable counterweight block for mining machinery according to the present invention.

[0018] Figure 4 This is a top cross-sectional view of the movable counterweight in an adjustable counterweight block for mining machinery according to this utility model.

[0019] In the diagram: 1. Fixed counterweight; 2. Movable counterweight; 3. Rotating shaft; 4. First connecting arm; 5. Second connecting arm; 6. Elastic snap-fit ​​component; 7. Snap-fit ​​hole; 8. Mounting cavity; 9. Guide hole; 10. Snap-fit ​​pin; 11. Limiting block; 12. Helical spring; 13. Pull ring. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] like Figure 1-4 As shown, an adjustable counterweight for mining machinery includes a fixed counterweight 1, a movable counterweight 2, and a rotating shaft 3. A first connecting arm 4 is fixedly mounted on the middle of the upper outer surface of the fixed counterweight 1, and a second connecting arm 5 is fixedly mounted on the middle of the upper outer surface of the movable counterweight 2. The first connecting arm 4 is fixedly mounted on the rotating shaft 3, and the second connecting arm 5 is rotatably mounted on the rotating shaft 3 via bearings, allowing the movable counterweight 2 to rotate relative to the fixed counterweight 1 around the axis of the rotating shaft 3. The fixed counterweight 1 and the movable counterweight 2 are arranged adjacent to each other, and both are semi-circular eccentric blocks of the same shape.

[0022] On the end faces of the fixed counterweight 1 and the movable counterweight 2, a plurality of locking holes 7 are provided at equal intervals along their circumference. These locking holes 7 are evenly distributed along the same circumference with the axis of the rotating shaft 3 as the center, and the central angle between adjacent holes corresponds to an adjustment position of the movable counterweight 2.

[0023] On the corresponding end face of the movable counterweight 2, there is a flexible locking member 6. The flexible locking member 6 can selectively engage with any locking hole 7 to achieve rapid positioning and locking of the movable counterweight 2 at different rotational positions.

[0024] Specifically, the elastic locking component 6 includes a mounting cavity 8, a guide hole 9, a locking pin 10, a limiting block 11, a coil spring 12, and a pull ring 13. The mounting cavity 8 is located inside one end of the movable counterweight 2, with its axis parallel to the radial direction of the rotating shaft 3. The guide hole 9 is located at the midpoint between both ends of the mounting cavity 8, extending through to the surface of the movable counterweight 2. The locking pin 10 passes through the guide hole 9 and the mounting cavity 8, with its outer wall precisely sliding against the guide hole 9. The limiting block 11 is fixed to the outer wall of the middle portion of the locking pin 10, and its outer wall also slides against the inner wall of the mounting cavity 8. The coil spring 12 is movably sleeved outside the locking pin 10 and located within the mounting cavity 8. One end of the coil spring 12 is fixed to one side of the outer surface of the limiting block 11, and the other end is fixed to the inner wall of the mounting cavity 8 near the pull ring 13, so that one side of the outer surface of the limiting block 11 is elastically connected to that end of the mounting cavity 8 via the coil spring 12. In its natural state, the elastic force of the helical spring 12 pushes the limiting block 11 and the locking pin 10 to move towards the fixed counterweight 1, causing the end of the locking pin 10 to extend beyond the end face of the movable counterweight 2. The pull ring 13 is located on the outside of the movable counterweight 2 away from the fixed counterweight 1 and is fixed to the outer surface of one end of the locking pin 10, facilitating manual operation.

[0025] It should be noted that this utility model is an adjustable counterweight for mining machinery, and its working principle and adjustment process are as follows: During initial assembly or adjustment, the operator faces the outside of the movable counterweight 2 and hooks or pulls the pull ring 13 with the fingers of one hand, pulling it outward (i.e., away from the fixed counterweight 1). The pull ring 13 drives the locking pin 10 to move along the guide hole 9 into the mounting cavity 8. The locking pin 10 drives the limiting block 11 to compress the coil spring 12 in the mounting cavity 8. When the head of the locking pin 10 completely exits from the currently mating locking hole 7 and retracts into the end face of the movable counterweight 2, the angular constraint between the movable counterweight 2 and the fixed counterweight 1 is released.

[0026] At this time, the operator uses his other hand to rotate the movable counterweight 2, causing it to rotate around the axis 3. Since the snap-fit ​​holes 7 on the end face of the fixed counterweight 1 are arranged in an evenly spaced circle, the operator can clearly perceive or rotate the movable counterweight 2 to the target angle position through the preset scale markings (which is a standard selection).

[0027] When the movable counterweight 2 rotates to the target position, aligning its guide hole 9 with the target locking hole 7 on the end face of the fixed counterweight 1, the operator releases the pull ring 13. The compressed helical spring 12 releases its elasticity, pushing the limit block 11 and the locking pin 10 to quickly reset towards the fixed counterweight 1. Under the action of the spring force, the head of the locking pin 10 automatically springs into the target locking hole 7, producing a "click" sound or a clear feeling of positioning, thus completing the rapid positioning and mechanical locking of the movable counterweight 2 to its new position.

[0028] At this point, the relative phase angle between the fixed counterweight 1 and the movable counterweight 2 is fixed, and the two combine to form a composite counterweight with a new eccentricity. When the rotating shaft 3 is driven to rotate, the composite counterweight generates a centrifugal force corresponding to the new eccentricity, thereby changing the magnitude of the excitation force of the mining machinery (such as a vibrating screen).

[0029] This invention, through the aforementioned elastic locking and segmented positioning mechanism, achieves tool-free, rapid, precise, and quantitative adjustment of the counterweight eccentricity, thereby improving the efficiency of equipment debugging and maintenance and parameter consistency.

[0030] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An adjustable counterweight for mining machinery, comprising a fixed counterweight (1), a movable counterweight (2), and a rotating shaft (3), wherein a first connecting arm (4) is fixedly installed on the middle of the upper outer surface of the fixed counterweight (1), and a second connecting arm (5) is fixedly installed on the middle of the upper outer surface of the movable counterweight (2), the first connecting arm (4) is fixedly installed on the rotating shaft (3), and the second connecting arm (5) is rotatably mounted on the rotating shaft (3), wherein the fixed counterweight (1) and the movable counterweight (2) are arranged adjacent to each other, characterized in that: On the end faces of the fixed counterweight (1) and the movable counterweight (2) opposite each other, a plurality of snap-fit ​​holes (7) are provided at equal intervals along their circumference; on the corresponding end face of the movable counterweight (2), an elastic snap-fit ​​member (6) is provided; the elastic snap-fit ​​member (6) can selectively cooperate with any of the snap-fit ​​holes (7) to achieve rapid positioning and locking of the movable counterweight (2) at different rotational positions; the elastic snap-fit ​​member (6) includes a mounting cavity (8), a guide hole (9), a snap-fit ​​pin (10), a limiting block (11), a helical spring (12) and a pull ring (13). The mounting cavity (8) is opened inside one end of the movable counterweight (2), and the guide hole (9) is opened in the middle of both ends of the mounting cavity (8), and the guide hole (9) penetrates to the surface of the movable counterweight (2).

2. The adjustable counterweight for mining machinery according to claim 1, characterized in that: The limiting block (11) and the helical spring (12) are both located in the mounting cavity (8), and the snap-fit ​​pin (10) passes through the guide hole (9) and the mounting cavity (8).

3. The adjustable counterweight for mining machinery according to claim 2, characterized in that: The pull ring (13) is located on the outside of the movable counterweight (2) away from the fixed counterweight (1), and the pull ring (13) is fixed to the outer surface of one end of the locking pin (10).

4. An adjustable counterweight for mining machinery according to claim 3, characterized in that: The limiting block (11) is fixed on the outer wall of the middle part of the snap-fit ​​pin (10), and the spiral spring (12) is movably sleeved on the outside of the snap-fit ​​pin (10). The spiral spring (12) is fixed between one side of the outer surface of the limiting block (11) and the end of the mounting cavity (8) near the pull ring (13).

5. An adjustable counterweight for mining machinery according to claim 4, characterized in that: The outer wall of the locking pin (10) and the guide hole (9) are in sliding fit, the outer wall of the limiting block (11) and the mounting cavity (8) are in sliding fit, and one side of the outer surface of the limiting block (11) is elastically connected to the end of the mounting cavity (8) near the pull ring (13) by a helical spring (12).

6. An adjustable counterweight for mining machinery according to claim 5, characterized in that: One end of the snap-fit ​​pin (10) can be inserted into and snapped into any of the snap-fit ​​holes (7).

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