A counterweight device for fine adjustment of the tension of the tail of a hoist

Abstract

The utility model discloses a counterweight device for the fine adjustment tensioning of the tail part of the hoist, including synchronous frame, tail shaft, two sliding seats, a plurality of main counterweight blocks, a plurality of fine adjustment counterweight blocks and two suspension mechanisms, be equipped with synchronous frame on the sliding seat, be equipped with main counterweight block on the synchronous frame, the both ends of tail shaft are rotatablely connected with two sliding seats respectively, all be equipped with suspension mechanism on the sliding seat, all be equipped with detachable fine adjustment counterweight block on the suspension mechanism, compared with prior art, can carry convenient, realize the fine adjustment of the tension.

Description

Technical Field

[0001] This utility model relates to the technical field of building material conveying machinery, and in particular to the technical field of a counterweight device for fine-tuning the tension at the tail of a hoist. Background Technology

[0002] The tail tensioning system is a key component of conveyor and other conveying machinery. Its purpose is to apply appropriate tension to the traction component to ensure sufficient initial tension and prevent slippage, while also compensating for the traction component that wears and stretches over time.

[0003] Existing hoist tail tensioning systems are mainly divided into two categories: one is the screw tensioning system, which adjusts the position of the tail drum by manually rotating the screw, thereby tensioning the traction component. Its advantages are simple structure, low cost, and small space occupation. However, after the tension is adjusted to a fixed tension, the tension cannot be automatically compensated for the slack caused by wear and elongation of the traction component. Operators need to check it regularly. Moreover, there is no specific reference in the adjustment process, and it all depends on human experience. This can easily lead to over-tightening that aggravates wear and increases power consumption, or over-loosening that causes slippage and bucket drop.

[0004] Another type is the counterweight gravity tensioning system, which uses gravity to automatically compensate for the elongation of the traction component by suspending a standard counterweight and maintaining a constant tension. Its advantages are constant tension, automatic compensation, and no need for frequent manual adjustment. However, the counterweight in the weight tensioning system requires sufficient vertical space to move up and down, and the entire counterweight is inconvenient to move constantly as the tension is increased or decreased, and it is difficult to make precise weight adjustments. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a counterweight device for fine-tuning the tension at the tail of a lifting machine, which is easy to transport and enables precise adjustment of the tension.

[0006] To achieve the above objectives, this utility model proposes a counterweight device for fine-tuning the tension at the tail of a hoist, comprising a synchronizing frame, a tail shaft, two slides, several main counterweights, several fine-tuning counterweights, and two suspension mechanisms. The slides are equipped with the synchronizing frame, and the synchronizing frame is equipped with the main counterweights. The two ends of the tail shaft are rotatably connected to the two slides respectively. Each slide is equipped with a suspension mechanism, and each suspension mechanism is equipped with a detachable fine-tuning counterweight.

[0007] Preferably, the suspension mechanism includes two suspension screws, a support seat, and two clamping nuts. The lower end of each suspension screw is provided with a support seat, and each suspension screw is provided with a clamping nut that is threadedly engaged with it.

[0008] Preferably, the fine-tuning counterweight has an opening that corresponds to and cooperates with the suspension screw.

[0009] Preferably, both ends of the synchronization frame are provided with anti-tipping mechanisms, which include supports and support wheels located at both ends of the supports.

[0010] Preferably, the crossbeam of the synchronous frame is provided with two fixing components, one at the front and one at the back. The fixing components include two fixing screws and two fixing nuts. The fixing screws pass through the main counterweight and are provided with fixing nuts that press and fix the main counterweight.

[0011] Preferably, the system also includes several small counterweights, which are respectively located on the upper sides of the main counterweight at the top and fixedly installed by corresponding fixing components.

[0012] Preferably, both ends of the tail shaft are provided with mounting heads with a diameter smaller than that of the tail shaft. The mounting heads are rotatably mounted in the corresponding slides via bearings. A bearing retaining ring and a labyrinth seal are sequentially fitted onto the mounting head between the bearing and the tail shaft. The bearing retaining ring is located inside the slide. The outer ring of the bearing retaining ring is sealed to the slide by a skeleton oil seal. The labyrinth seal is located at the inner end of the slide. The inner end of the slide is provided with a sealing groove that mates with the sealing ring of the labyrinth seal.

[0013] The beneficial effects of this utility model are as follows: By equipping the slide with a synchronous frame, the synchronous frame with a main counterweight, and the slide with a suspension mechanism, the suspension mechanism is equipped with a detachable fine-tuning counterweight. Through the cooperation of the main counterweight and the fine-tuning counterweight, the weight can be adjusted more accurately to achieve fine adjustment of the tension. At the same time, it is easy to transport and install. Compared with the prior art, it is easy to transport and achieves fine adjustment of the tension.

[0014] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a counterweight device for fine-tuning the tension at the tail of a hoist according to the present invention; Figure 2 This is a partial sectional view of a counterweight device for fine-tuning tension at the tail of a hoist, according to the present invention. Figure 3 This is a schematic diagram of the fine-tuning counterweight fixed to the suspension mechanism.

[0016] In the diagram: 1-synchronous frame, 2-tail shaft, 3-slide block, 4-main counterweight, 5-fine-tuning counterweight, 6-suspension mechanism, 7-anti-tipping mechanism, 8-fixing screw, 9-fixing nut, 10-small counterweight, 11-bearing, 12-bearing retaining ring, 13-labyrinth seal, 14-skeleton oil seal, 15-sealing groove, 61-suspension screw, 62-support seat, 63-compression nut, 71-support, 72-support wheel. Detailed Implementation

[0017] See Figure 1 , Figure 2 and Figure 3 This utility model discloses a counterweight device for fine-tuning the tension at the tail of a hoist, comprising a timing frame 1, a tail shaft 2, two slides 3, several main counterweights 4, several fine-tuning counterweights 5, and two suspension mechanisms 6. The slides 3 are provided with the timing frame 1, and the timing frame 1 is provided with the main counterweights 4. The two ends of the tail shaft 2 are rotatably connected to the two slides 3 respectively. Each slide 3 is provided with a suspension mechanism 6, and each suspension mechanism 6 is provided with a detachable fine-tuning counterweight 5.

[0018] The suspension mechanism 6 includes two suspension screws 61, a support seat 62, and two clamping nuts 63. The lower end of the suspension screw 61 is provided with a support seat 62, and each suspension screw 61 is provided with a clamping nut 63 that is threadedly engaged with it.

[0019] The fine-tuning counterweight 5 is provided with an opening 51 that corresponds to and cooperates with the suspension screw 61.

[0020] Both ends of the synchronous frame 1 are provided with anti-tipping mechanisms 7, and the anti-tipping mechanism 7 includes a support 71 and support wheels 72 provided at both ends of the support 71.

[0021] The crossbeam of the synchronous frame 1 is provided with two fixing components, one at the front and one at the back. The fixing components include two fixing screws 8 and two fixing nuts 9. The fixing screws 8 pass through the main counterweight 4 and are provided with fixing nuts 9 to press and fix the main counterweight 4.

[0022] It also includes several small counterweights 10, which are respectively located on the upper sides of the main counterweight 4 at the top and fixedly installed by corresponding fixing components.

[0023] Both ends of the tail shaft 2 are provided with mounting heads 21 with a diameter smaller than that of the tail shaft 2. The mounting heads 21 are rotatably mounted in the corresponding slides 3 via bearings 11. A bearing retaining ring 12 and a labyrinth seal ring 13 are sequentially fitted on the mounting heads 21 between the bearings 11 and the tail shaft 2. The bearing retaining ring 12 is located inside the slide 3. The outer ring of the bearing retaining ring 12 is sealed to the slide 3 by a skeleton oil seal 14. The labyrinth seal ring 13 is located at the inner end of the slide 3. The inner end of the slide 3 is provided with a sealing groove 15 that cooperates with the sealing ring of the labyrinth seal ring 13.

[0024] The working process of this utility model: This utility model discloses a counterweight device for fine-tuning the tension at the tail of a hoist. During operation, a certain number of main counterweight blocks 4 are stacked and fixed on the synchronous frame 1 to achieve a certain counterweight weight. Then, a certain number of fine-tuning counterweight blocks 5 are fixed on the corresponding suspension mechanisms 6 to achieve the required total weight of the main counterweight blocks 4 and the fine-tuning counterweight blocks 5. The weight of the fine-tuning counterweight blocks 5 is less than the weight of the main counterweight blocks 4. By using multiple counterweights of two specifications, the weight can be adjusted more accurately to achieve fine adjustment of the tension. The fine-tuning counterweight blocks 5 are fixed on the corresponding suspension mechanisms 6 to solve the problem of inconvenience in adding or removing weights within the built-in space.

[0025] After the hoist has been running for a long time, the traction components may become loose due to wear and elongation, or the internal traction components, buckets or counterweights may wear due to material conditions, causing the counterweight center to shift. In this case, the number of small counterweight blocks 10 can be adjusted by opening the inspection door on the side panel of the tail casing. If the balance cannot be finely adjusted by relying solely on the small counterweight blocks 10, the number of fine-tuning counterweight blocks 5 can also be adjusted to meet the fine-tuning balance requirements. Using small counterweight blocks can reduce the volume occupied by the counterweight blocks inside the tail casing and facilitate handling and installation.

[0026] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A counterweight device for fine tuning the tension of the tail of a hoist, characterized by: It includes a timing frame (1), a tail shaft (2), two slides (3), several main counterweights (4), several fine-tuning counterweights (5), and two suspension mechanisms (6). The slides (3) are equipped with the timing frame (1), and the timing frame (1) is equipped with the main counterweights (4). The two ends of the tail shaft (2) are rotatably connected to the two slides (3) respectively. The slides (3) are equipped with suspension mechanisms (6), and the suspension mechanisms (6) are equipped with detachable fine-tuning counterweights (5).

2. A counterweight device for fine tuning the tension of the tail of a hoist according to claim 1, characterized in that: The suspension mechanism (6) includes two suspension screws (61), a support seat (62) and two clamping nuts (63). The lower end of the suspension screw (61) is provided with a support seat (62), and each suspension screw (61) is provided with a clamping nut (63) that is threadedly engaged with it.

3. A counterweight device for fine tuning the tension of the tail of a hoist as defined in claim 2, characterized in that: The fine-tuning counterweight (5) has an opening (51) that corresponds to and cooperates with the suspension screw (61).

4. A counterweight device for fine tuning the tension of the tail of a hoist as defined in claim 1, characterized in that: Both ends of the synchronous frame (1) are provided with anti-tipping mechanisms (7), and the anti-tipping mechanism (7) includes a support (71) and support wheels (72) at both ends of the support (71).

5. A counterweight device for fine tuning the tension of the tail of a hoist as defined in claim 1, characterized in that: The crossbeam of the synchronous frame (1) is provided with two fixing components, one in the front and one in the rear. The fixing components include two fixing screws (8) and two fixing nuts (9). The fixing screws (8) pass through the main counterweight (4) and are provided with fixing nuts (9) to press and fix the main counterweight (4).

6. A counterweight device for fine tuning the tension of the tail of a hoist as defined in claim 5, characterized in that: It also includes several small counterweights (10), which are respectively located on the upper sides of the main counterweight (4) and fixedly installed by corresponding fixing components.

7. A counterweight device for fine tuning the tension of the tail section of a hoist according to any one of claims 1 to 6, characterized in that: Both ends of the tail shaft (2) are provided with mounting heads (21) with a diameter smaller than that of the tail shaft (2). The mounting heads (21) are rotatably mounted in the corresponding slides (3) via bearings (11). A bearing retaining ring (12) and a labyrinth seal ring (13) are sequentially fitted on the mounting heads (21) between the bearings (11) and the tail shaft (2). The bearing retaining ring (12) is located inside the slides (3). The outer ring of the bearing retaining ring (12) is sealed to the slides (3) by a skeleton oil seal (14). The labyrinth seal ring (13) is located at the inner end of the slides (3). The inner end of the slides (3) is provided with a sealing groove (15) that matches the sealing ring of the labyrinth seal ring (13).

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