Double-bearing pull box

Abstract

The utility model discloses a double-bearing pull box, which comprises a pull box and an encoder, the encoder is inserted on the pull box through a pin block, the pull box comprises a sleeve box, the sleeve box is provided with a cylindrical groove and a lead hole, the sleeve box is provided with a cover plate, the sleeve box and the cover plate are respectively provided with a bearing, and the bearing is provided with a bearing. A hub is arranged on the pair of bearings, a clockwork spring is arranged on the outer side of the hub, and a buffer connecting column is arranged between the hub and the encoder. The pull box disclosed by the utility model relates to the technical field of pull boxes, realizes tool-free quick disassembly and assembly, improves the replacement efficiency of the encoder and thoroughly avoids the clockwork spring disassembly risk; the axial load of the encoder is reduced by a hub double-bearing supporting structure, vibration impact can be absorbed in cooperation with a composite damping system of a spring steel buffer column and a rubber ring, and the operation precision of the encoder under severe working conditions is ensured in combination with the low-friction design of an auxiliary telescopic ball.

Description

Technical Field

[0001] This utility model relates to the field of cable box technology, specifically a double-bearing cable box. Background Technology

[0002] In the field of construction machinery, there is significant room for technological improvement in displacement monitoring systems for large equipment. Current mainstream solutions employ pull-wire displacement sensors (pull-wire boxes) as auxiliary components of the encoder, with a structure consisting of core components such as a rear cover, hub assembly, spring, and flange connector. This device achieves the conversion of displacement to rotational motion through a pull-wire winding mechanism, but practical applications have revealed a significant technical bottleneck: prominent maintenance complexity. Existing designs use a rigid connection between the encoder shaft and the hub flange. When the encoder needs to be replaced, the rear cover, hub, and flange assembly must be disassembled in a specific sequence. This multi-stage disassembly process is not only time-consuming but also poses a major safety hazard due to the accidental release of the spring. Therefore, this project was developed to address these issues in depth. Utility Model Content

[0003] To achieve the above objectives, this utility model provides the following technical solution: a double-bearing cable box, comprising a cable box and an encoder, wherein the encoder is inserted into the cable box via a pin block; the cable box includes a sleeve, the sleeve having a cylindrical groove and a lead wire hole; a cover plate is provided on the sleeve; bearings are respectively provided on the sleeve and the cover plate; a hub is provided on a pair of bearings; a spring is provided on the outer side of the hub; a buffer connecting post is provided between the hub and the encoder; the buffer connecting post... The connector includes a cylindrical block, on which a conductive groove and a pair of insertion holes are formed. A pair of coaxial reducing connectors are provided on the inner side of the cylindrical block. Each coaxial reducing connector has an insertion groove. Each pair of coaxial reducing connectors has a concave insertion hole. A conductive disk is provided between the pair of coaxial reducing connectors. Conductive blocks are provided on both sides of the conductive disk. The pair of conductive blocks are welded to both sides of the conductive disk in a cross shape and are movably inserted into the inner side of the pair of concave insertion holes.

[0004] Preferably, a rubber ring is provided on the outer side of the conductive disc, the rubber ring is fitted onto a pair of coaxial reducing connectors, and two pairs of extrusion rubber blocks are provided on the inner side of the rubber ring, the two pairs of extrusion rubber blocks being movably inserted into the inner side of a pair of concave insertion holes.

[0005] Preferably, the encoder is movably inserted into the inner side of the insertion slot on the coaxial reducer via a pin block, and the other coaxial reducer is inserted into the inner side of the hub via a pin block.

[0006] Preferably, each of the pair of conductive blocks is provided with a ball groove, and an auxiliary telescopic ball is provided on the inner side of the ball groove.

[0007] Preferably, the cylindrical block of the set is made of spring steel.

[0008] Preferably, a bearing is provided above each of the pair of insertion holes.

[0009] Beneficial effects

[0010] This utility model provides a dual-bearing pull box. It offers the following advantages: The dual-bearing pull box utilizes a coaxial reducing connector to create an independent insertion system for the encoder and pull box, enabling tool-free quick assembly and disassembly, improving encoder replacement efficiency and completely eliminating the risk of spring disassembly; the hub dual-bearing support structure reduces the encoder's axial load, and the composite damping system of spring steel buffer columns and rubber rings absorbs vibration shocks; combined with the low-friction design of the auxiliary telescopic ball, it ensures the encoder's operating accuracy under harsh conditions; the cross-shaped fine-tuning mechanism of the transmission disc provides bidirectional error compensation capability, supporting coupling or dummy shaft connections while maintaining a compact size, extending the encoder's service life. This solution integrates convenient maintenance, precision transmission, and environmental adaptability, reducing equipment downtime and lowering overall operating costs, providing a highly reliable and easy-to-maintain solution for displacement measurement systems in engineering machinery. Attached Figure Description

[0011] Figure 1 This is a three-dimensional cross-sectional view of the dual-bearing pull-wire box described in this utility model.

[0012] Figure 2 This is a front sectional view of the dual-bearing pull-wire box described in this utility model.

[0013] Figure 3 This is a top sectional view of the dual-bearing pull-wire box described in this utility model.

[0014] In the diagram: 1. Sleeve; 2. Cover plate; 3. Bearing; 4. Hub; 5. Spring; 6. Encoder; 7. Set cylindrical block; 8. Coaxial reducer; 9. Concave insertion hole; 10. Conducting disc; 11. Conducting block; 12. Set rubber ring; 13. Extruded rubber block. Detailed Implementation

[0015] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0017] Example

[0018] Please see Figure 1-3 Since the hub 4 and flange need to be connected to the encoder 6 first, if the encoder 6 needs to be replaced, the entire rear cover of the cable box, hub 4, and flange need to be disassembled in sequence. The installation and disassembly process is quite cumbersome. At the same time, since the replacement process involves the disassembly and assembly of the spring 5, if the operator is not skilled, it may cause personal injury, which is quite dangerous. Since the cable is directly wrapped around the hub 4, and the only support point of the hub 4 is the shaft of the encoder 6, all the force generated by the spring 5 due to winding will act on the shaft of the encoder 6. As a precision electrical component, the encoder 6 will have its service life reduced if it is subjected to force for a long time, which will affect the stability and safety of the equipment.

[0019] Therefore, this application protects the double-bearing cable box. The sleeve 1 and the cover plate 2 are rigidly connected by a precision bolt group to form a fully enclosed protective structure. The bottom of the sleeve 1 is provided with a cylindrical groove and a lead wire hole. The inner side of the cover plate 2 is machined with a bearing 3 mounting position. The bearing 3 seat at the corresponding position of the sleeve 1 forms a double bearing 3 support structure. The hub 4 is supported by a pair of bearings 3 arranged at the front and rear to achieve double support. The outer ring of the bearing 3 is embedded in the bearing 3 seat of the sleeve 1 and the cover plate 2 respectively, and the inner ring forms an interference fit with the journal of the hub 4. This design changes the traditional single-point support to double-point support, which improves the rotation accuracy of the hub 4. Similarly, the encoder 6 is movably inserted into the inner side of the insertion slot of the coaxial reducer 8 through a pin block. The pair of coaxial reducers 8 drive the transmission blocks 11 on them respectively. The pair of transmission blocks 11 are movably inserted into a pair of concave inserts on the transmission disk 10 respectively. Inside the mounting hole 9, a pair of concave insertion holes 9 form a cross shape, allowing for vertical and horizontal fine-tuning. Simultaneously, two pairs of extrusion blocks inside the sleeve rubber ring 12 provide lateral compression and limiting of the pair of transmission blocks 11. This allows for adjustment of the encoder 6 and hub 4's axis by external force. The sleeve cylindrical block 7 and sleeve rubber ring 12 provide cushioning during rotation. A double coaxial reducing connector 8 achieves a flexible connection between the encoder 6 and hub 4. One end of the connector is inserted into the encoder 6 shaft without clearance via a pin block, while the other end is circumferentially positioned within the hub 4's inner hole via a pin groove. The transmission block 11 engages with the cross-shaped concave insertion hole 9 of the transmission disc 10, forming a two-way vertical and horizontal fine-tuning space. This ensures transmission accuracy, absorbs installation errors, and assists the telescopic ball in rolling freely within the ball groove, further reducing frictional resistance during adjustment.

[0020] In summary, the cable box, as a single unit, is connected to the encoder 6. Replacing either the encoder 6 or the cable box only requires replacing one of these components. In particular, replacing the encoder 6 eliminates the need to remove the cable box as well, making the process quick and convenient and significantly reducing the difficulty for workers. Furthermore, it eliminates the need to disassemble the spring 5, avoiding the risk of injury to workers from the spring 5 during operation and ensuring personnel safety.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual bearing stay box characterized by, The device includes a cable box and an encoder (6). The encoder (6) is inserted into the cable box via a pin. The cable box includes a housing (1). The housing (1) has a cylindrical groove and a lead wire hole. The housing (1) is provided with a cover plate (2). Bearings (3) are respectively provided on the housing (1) and the cover plate (2). A hub (4) is provided on a pair of bearings (3). A spring (5) is provided on the outer side of the hub (4). A buffer connecting post is provided between the hub (4) and the encoder (6). The buffer connecting post includes a fitted cylindrical block (7). A conductive groove and a pair of insertion holes are provided on the cylindrical block (7). A pair of coaxial reducing connectors (8) are provided on the inner side of the cylindrical block (7). The coaxial reducing connectors (8) are provided with insertion groove holes. A conductive block (11) is provided on each of the coaxial reducing connectors (8). A conductive disc (10) is provided between the coaxial reducing connectors (8). Concave insertion holes (9) are provided on both sides of the conductive disc (10). The pair of concave insertion holes (9) are formed in a cross shape on both sides of the conductive disc (10) and are movably fitted on the pair of conductive blocks (11).

2. The dual bearing stay box of claim 1, wherein, The outer side of the conductive disc (10) is provided with a fitting rubber ring (12), which is fitted onto a pair of coaxial reducing connectors (8). The inner side of the fitting rubber ring (12) is provided with two pairs of extrusion rubber blocks, which are respectively movably inserted into the inner side of a pair of concave insertion holes (9).

3. The dual bearing stay box of claim 2, wherein, The encoder (6) is movably inserted into the inner side of the insertion slot on the coaxial reducer (8) via a pin block, and the other coaxial reducer (8) is inserted into the inner side of the hub (4) via a pin block.

4. The dual bearing stay box of claim 3, wherein, Each pair of the conductive blocks (11) is provided with a ball groove, and an auxiliary telescopic ball is provided on the inner side of the ball groove.

5. The dual bearing stay box of claim 4, wherein, The cylindrical block (7) of the set is made of spring steel.

6. The dual bearing stay box of claim 5, wherein, Bearings (3) are respectively provided above the pair of insertion holes.

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