Miniature rolling and pulling device

Abstract

The invention relates to the technical field of rolling and pulling, and provides a miniature rolling and pulling device which comprises a winch shaft, a steel wire rope, a clamping head and a mounting seat, the winch shaft is rotationally arranged on the mounting seat, the clamping head is provided with a through hole, one end of the steel wire rope penetrates through the through hole, the steel wire rope and the clamping head are in press fit connection through external pressure, and a mounting counter bore is formed in the side wall of the winch shaft. A rope hole penetrating through the winch shaft in the radial direction is formed in the bottom of the mounting counter bore, and the steel wire rope extends out of the rope hole. The clamping head and the steel wire rope are in press fit connection through external pressure, that is, the clamping head is extruded through the external pressure to generate irreversible deformation, so that the clamping head and the steel wire rope are tightly wrapped and extruded together, and tight connection is achieved; and the clamping head is embedded in the mounting counter bore in the winch shaft, so that the clamping head does not occupy any external space, the rolling and pulling device can be miniaturized conveniently, and the rolling and pulling device can be suitable for a narrow space conveniently.

Description

Technical Field

[0001] The present invention relates to the field of rolling and pulling technology, in particular to a micro rolling and pulling device. Background Art

[0002] The winding and pulling device usually utilizes the rotation of the capstan shaft to drive the wire rope to be retracted and released to achieve actions such as lifting and pulling objects. For example, winches and capstans are all winding and pulling devices. In the winding and pulling device, one end of the wire rope is usually fixed to the capstan shaft by a wire rope clamp (also commonly called a wire rope clamp, a wire drum, a wire clip, etc., which is achieved by tightening the nut on the U-bolt so that the pressure block clamps the wire rope).

[0003] On some aircraft, there are some covers on the surface of the aircraft that use spring force as the power to close the door. This type of cover uses a winding and pulling device to perform the opening and closing action. The installation space of the winding and pulling device is very narrow. It is necessary to make the winding and pulling device as small as possible while meeting the load requirements. The existing wire rope clamps need to occupy a huge installation space and cannot be used in the above occasions. Summary of the invention

[0004] The object of the present invention is to provide a micro-rolling and pulling device to solve the above-mentioned defects of the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A miniature winding and pulling device comprises a capstan shaft, a steel wire rope, a chuck and a mounting seat. The capstan shaft is rotatably arranged on the mounting seat. The chuck is provided with a through hole. One end of the steel wire rope is inserted into the through hole. The steel wire rope and the chuck are connected by external pressure compression. A mounting countersunk hole is provided on the side wall of the capstan shaft. The chuck is embedded in the mounting countersunk hole. A rope hole is provided at the bottom of the mounting countersunk hole which runs through the radial direction of the capstan shaft. The steel wire rope extends out of the rope hole.

[0007] Optionally, the mounting seat includes a base and a protective seat, the protective seat is connected to the base by fasteners, a cavity is provided on one side of the protective seat close to the base, the winch shaft is rotatably arranged in the cavity, and an opening connected to the cavity is provided on the side wall of the protective seat for the wire rope to pass through.

[0008] Optionally, a first baffle and a second baffle are spaced apart along the axial direction on the capstan shaft, the first baffle abuts against the base, and the second baffle abuts against a side of the cavity away from the base.

[0009] Optionally, a wear pad is provided between the base and the protection seat, and the first baffle plate abuts against the wear pad.

[0010] Optionally, the cavity is cylindrical, the first baffle cooperates with the side wall of the cavity, a connecting shaft is provided on a side of the second baffle away from the first baffle, and a hole cooperating with the connecting shaft is provided on the protective seat.

[0011] Optionally, a rotating shaft is provided on a side of the first baffle away from the second baffle, a wrench hole is provided at the end of the rotating shaft, and a avoidance hole for avoiding the rotating shaft is provided on the base, and a diameter of the avoidance hole is larger than a diameter of the rotating shaft.

[0012] Optionally, the winding and pulling device also includes an anti-rotation pin; the first baffle is provided with a plurality of graduated holes evenly spaced along the circumferential direction, and the base is provided with a pin hole so that the anti-rotation pin can be inserted into the graduated hole to fix the capstan shaft.

[0013] Optionally, an anti-retreat step is provided at one end of the anti-rotation pin, so that after the anti-rotation pin is inserted into the indexing hole, the anti-retreat step abuts against the first baffle plate to prevent the anti-rotation pin from falling off.

[0014] Optionally, a mounting groove is provided on a side of the base away from the protective seat, a blocking plate for blocking the pin hole and the avoidance hole is provided in the mounting groove, and the blocking plate is connected to the mounting seat by connecting screws.

[0015] Optionally, the sealing plate is connected to the protective seat via the connecting screws, a step hole is provided on the base, the large diameter section of the step hole is located on the side close to the protective seat, the small diameter section of the step hole is located on the side away from the protective seat, and the small diameter section of the step hole is provided with an internal thread that can be connected to the threaded section of the connecting screw.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects: in the present invention, the chuck is connected to the steel wire rope by pressing and fitting through external pressure, that is, the chuck is squeezed by external pressure to cause irreversible deformation, so that it is tightly wrapped and squeezed together with the steel wire rope to achieve a tight connection; the chuck is then embedded in the mounting countersunk hole on the capstan shaft, so that the chuck does not occupy any external space, which facilitates the miniaturization of the winding and pulling device, and further facilitates the winding and pulling device to be suitable for a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic structural diagram of a micro-rolling and pulling device provided by the present invention;

[0019] Figure 2 A top view of a micro-rolling and pulling device provided by the present invention;

[0020] Figure 3 for Figure 2 AA section view in;

[0021] Figure 4 is a cross-sectional view of the base;

[0022] Figure 5 It is a schematic diagram of the connection structure of the clamp, the wire rope and the capstan shaft;

[0023] Figure 6 It is a cross-sectional view of the connection structure of the clamp, wire rope and capstan shaft;

[0024] Figure 7 A diagram showing the use status of a micro-rolling and pulling device provided by the present invention;

[0025] Figure 8 A cross-sectional view of a micro-rolling and pulling device provided by the present invention in use;

[0026] Fig. 9 A schematic diagram of the structure for preventing the pin from rotating;

[0027] Fig.10 for Fig. 9 The enlarged view of point B in the figure;

[0028] Icon: 1-capstan shaft, 101-first gear plate, 1011-indexing hole, 102-second gear plate, 103-connecting shaft, 104-rotating shaft, 1041-wrench hole, 2-wire rope, 3-chuck, 4-protection seat, 401-cavity, 5-base, 501-avoidance hole, 502-pin hole, 503-step hole, 5031-large diameter section, 5032-small diameter section, 6-wear pad, 7-anti-rotation pin, 701-anti-retreat step, 8-anti-collision sleeve, 9-sealing plate, 10-connecting screw, 11-wrench. DETAILED DESCRIPTION

[0029] refer to Figure 1 A miniature winding and pulling device comprises a winch shaft 1, a steel wire rope 2, a clamp 3 and a mounting seat.

[0030] The capstan shaft 1 is rotatably arranged on the mounting seat, the chuck 3 is provided with a through hole, one end of the wire rope 2 is passed through the through hole, and the wire rope 2 and the chuck 3 are connected by external pressure compression, that is, the chuck 3 is squeezed by external pressure to cause irreversible deformation, so that it is tightly wrapped and squeezed together with the wire rope 2 to achieve a tight connection. As an option, the chuck 3 of this embodiment is designed to be cylindrical, and the through hole for passing the wire rope 2 is arranged along the axis of the chuck 3. In practical applications, the external pressure can be other pressure equipment such as a press. It is easy to understand that the pressure is applied radially during extrusion, and the cross section of the chuck 3 perpendicular to the axis after extrusion is a flat structure similar to an ellipse.

[0031] refer to Figure 5 and Figure 6The side wall of the capstan shaft 1 is provided with a mounting countersunk hole, and the chuck 3 is embedded in the mounting countersunk hole. It is easy to understand that the chuck 3 is installed with interference fit with the mounting countersunk hole. The bottom of the mounting countersunk hole is provided with a rope hole that runs through the radial direction of the capstan shaft 1. The wire rope 2 extends out of the rope hole, and the rope hole outlet can be rounded to prevent the wire rope 2 from being scratched during the winding process. After the chuck 3 is installed, the wire rope 2 protruding from the capstan shaft 1 and the chuck 3 are filed to ensure that the capstan shaft 1 is smooth, so that the wire rope 2 can be wound smoothly.

[0032] refer to Figure 1-Figure 3 The mounting base includes a base 5 and a protective base 4, and the protective base 4 is connected to the base 5 by fasteners. As an option, the fasteners are screws, and the screws are screwed from the protective base 4 into the base 5. In actual applications, wire screw sleeves (also known as threaded sleeves) can be set in the corresponding screw holes on the base 5, and the screw pressing surface is pressed with a gasket to prevent loosening.

[0033] A cavity 401 is provided on one side of the protection seat 4 close to the base 5, and the capstan shaft 1 is rotatably disposed in the cavity 401. The cavity 401 accommodates both the capstan shaft 1 and the wire rope 2 wound on the capstan shaft 1. The side wall of the protection seat 4 is provided with an opening connected to the cavity 401 for the wire rope 2 to pass through, thereby ensuring the smooth retraction and release of the wire rope 2.

[0034] refer to Figure 3 and Figure 5 In this embodiment, the capstan shaft 1 is provided with a first baffle 101 and a second baffle 102 at intervals in the axial direction, the first baffle 101 abuts against the base 5, and the second baffle 102 abuts against the side of the cavity 401 away from the base 5. With such a configuration, on the one hand, the first baffle 101 and the second baffle 102 are used to realize the axial positioning of the capstan shaft 1; on the other hand, the steel wire rope 2 wound on the capstan shaft 1 can be constrained between the first baffle 101 and the second baffle 102.

[0035] Based on the above, refer to Figure 1 and Figure 3 A wear pad 6 is provided between the base 5 and the protective seat 4, so that the first baffle plate 101 is in contact with the wear pad 6. Since the winch shaft 1 is in sliding friction during the entire winding process, the first baffle plate 101 is in contact with the wear pad 6 and does not directly contact the base 5. In this way, after the wear pad 6 is worn, only the wear pad 6 needs to be replaced without damaging the base 5, which greatly improves the service life and economy.

[0036] Further, refer to Figure 3 and Figure 5In this embodiment, the cavity 401 is cylindrical, and the first baffle 101 matches the side wall of the cavity 401, that is, the nominal diameter of the first baffle 101 is the same as the nominal diameter of the inner wall of the cavity 401; the second baffle 102 is provided with a connecting shaft 103 on the side away from the first baffle 101, and the protective seat 4 is provided with a hole matching the connecting shaft 103. In this way, while ensuring the high-precision rotation of the capstan shaft 1, there is no contact between the capstan shaft 1 and the base 5, avoiding wear on the base 5.

[0037] It is easy to understand that the above installation method of the winch shaft 1 is only an option, not a limitation. In some embodiments of the present invention, the arrangement of the winch shaft 1 can of course be other ways. For example, in some embodiments, one end of the winch shaft 1 is penetrated on the protective seat 4, and the other end is penetrated on the base 5. In some embodiments, the first baffle 101 and the second baffle 102 are also provided, and both the first baffle 101 and the second baffle 102 cooperate with the inner wall of the cavity 401.

[0038] refer to Figure 5 In this embodiment, a rotating shaft 104 is provided on the side of the first baffle 101 away from the second baffle 102 (it is easy to understand that the rotating shaft 104, the first baffle 101, the second baffle 102, the capstan shaft 1 and the connecting shaft 103 should be coaxial in this embodiment), and a wrench hole 1041 is provided at the end of the rotating shaft 104. The cross section of the wrench hole 1041 perpendicular to the axis is a regular hexagon, and its function is to be used for inserting the wrench 11, and the torque is transmitted by rotating the wrench 11 to drive the capstan shaft 1 to rotate, thereby realizing the retraction and release of the wire rope 2. On the basis of the rotating shaft 104, an avoidance hole 501 for avoiding the rotating shaft 104 is provided on the base 5, and the diameter of the avoidance hole 501 is larger than the diameter of the rotating shaft 104 to avoid wear.

[0039] refer to Figure 7 and Figure 8 On the basis of the above, the winding and pulling device of this embodiment also includes an anti-rotation pin 7, a first baffle 101 is evenly spaced with a plurality of indexing holes 1011 along the circumferential direction, and a pin hole 502 is provided on the base 5. In actual application, after the capstan shaft 1 is rotated into place, the capstan shaft 1 can be fixed by inserting the anti-rotation pin 7 into the indexing hole 1011. By removing the anti-rotation pin 7, the capstan shaft 1 can be rotated by the wrench 11.

[0040] It is worth noting that, on the basis of the above, during operation, one hand is required to hold the anti-rotation pin 7 and the other hand to operate the wrench 11, which is inconvenient to operate. Fig. 9 and Fig.10In this embodiment, one end of the anti-rotation pin 7 is provided with an anti-retreat step 701. When in use, the end provided with the anti-retreat step 701 is inserted into the indexing hole 1011, and the anti-retreat step 701 is made higher than the first baffle plate 101. Since the diameter of the anti-rotation pin 7 below the anti-retreat step 701 is smaller than the indexing hole 1011, after the anti-rotation pin 7 is released, the capstan shaft 1 can rotate slightly (that is, the anti-rotation pin 7 and the corresponding indexing hole 1011 are not coaxial). In this way, the anti-retreat step 701 can be abutted against the first baffle plate 101 (that is, it is buckled on the first baffle plate 101) to limit the anti-rotation pin 7 from falling off, that is, the anti-rotation pin 7 does not need to be held by hand after being inserted into the indexing hole 1011, making the operation more convenient. In addition, it should be understood that when the wire rope 2 needs to be retracted and released again, the capstan shaft 1 is first rotated by the wrench 11 to align the indexing hole 1011 with the anti-rotation pin 7, and the anti-rotation pin 7 is removed.

[0041] In practical applications, refer to Figure 3 An anti-collision sleeve 8 can also be set in the pin hole 502 to prevent the anti-rotation pin 7 from directly contacting the base 5. The installation method of the anti-collision sleeve 8 is not limited. As an option, a step is provided in the pin hole 502 of this embodiment, and the anti-collision sleeve 8 is designed as a "T"-shaped cylindrical structure, placed on the step, and pressed by the wear pad 6.

[0042] It is worth noting that if the reeling device is used on an aircraft, the avoidance hole 501 and the pin hole 502 at the bottom of the base 5 are likely to affect the flow field and also affect the appearance. Therefore, the present embodiment has been improved as follows: Figure 3 and Figure 4 A mounting groove is provided on one side of the base 5 away from the protection seat 4, and a blocking plate 9 for blocking the pin hole 502 and the avoidance hole 501 is provided in the mounting groove, and the blocking plate 9 is connected to the mounting seat by a connecting screw 10. In practical applications, only one connecting screw 10 is required, and when the capstan shaft 1 needs to be rotated, the connecting screw 10 is loosened, and the blocking plate 9 is rotated by a certain angle (for example, 90° or 180°) to expose the pin hole 502 and the wrench hole 1041.

[0043] Furthermore, in this embodiment, the blocking plate 9 is connected to the protection seat 4 by a connecting screw 10, that is, a corresponding screw hole is provided on the protection seat 4, and the connecting screw 10 is screwed into the protection seat 4 from the bottom of the base 5. In practical applications, a wire screw sleeve can be provided in the screw hole on the protection seat 4 to prevent loosening. A stepped hole 503 is provided on the base 5, and the large diameter section 5031 of the stepped hole 503 is located on the side close to the protection seat 4, and the small diameter section 5032 of the stepped hole 503 is located on the side away from the protection seat 4, and the small diameter section 5032 of the stepped hole 503 is provided with an internal thread that can be connected to the threaded section of the connecting screw 10. In this way, after the connecting screw 10 is loosened, since the small diameter section 5032 of the stepped hole 503 is provided with an internal thread, the connecting screw 10 can be prevented from being separated from the base 5, making the operation more convenient.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A micro-winding and pulling device, comprising a capstan shaft, a steel wire rope, a clamp and a mounting seat, wherein the capstan shaft is rotatably arranged on the mounting seat, characterized in that: The clamp is provided with a through hole, one end of the wire rope is inserted into the through hole, and the wire rope and the clamp are connected by external pressure pressing. The side wall of the capstan shaft is provided with a mounting countersunk hole, and the clamp is embedded in the mounting countersunk hole. The bottom of the mounting countersunk hole is provided with a rope hole that runs through the radial direction of the capstan shaft, and the wire rope extends out of the rope hole.

2. The micro-rolling device according to claim 1, characterized in that: The mounting seat includes a base and a protective seat, the protective seat is connected to the base by fasteners, a cavity is provided on one side of the protective seat close to the base, the winch shaft is rotatably arranged in the cavity, and an opening connected to the cavity is provided on the side wall of the protective seat for the wire rope to pass through.

3. The micro-rolling device according to claim 2, characterized in that: The capstan shaft is provided with a first baffle and a second baffle at intervals in the axial direction. The first baffle abuts against the base, and the second baffle abuts against a side of the cavity away from the base.

4. The micro-rolling device according to claim 3, characterized in that: A wear pad is arranged between the base and the protection seat, and the first baffle plate abuts against the wear pad.

5. The micro-rolling device according to claim 3 or 4, characterized in that: The cavity is cylindrical, the first baffle cooperates with the side wall of the cavity, a connecting shaft is provided on a side of the second baffle away from the first baffle, and a hole cooperating with the connecting shaft is provided on the protection seat.

6. The micro-rolling device according to claim 5, characterized in that: A rotating shaft is arranged on one side of the first baffle away from the second baffle, a wrench hole is arranged at the end of the rotating shaft, and an avoidance hole for avoiding the rotating shaft is arranged on the base, and the diameter of the avoidance hole is larger than the diameter of the rotating shaft.

7. The micro-rolling device according to claim 6, characterized in that: The winding and pulling device also includes an anti-rotation pin; the first baffle is evenly spaced with a plurality of indexing holes along the circumferential direction, and the base is provided with a pin hole so that the anti-rotation pin can be inserted into the indexing hole to fix the capstan shaft.

8. The micro-rolling device according to claim 7, characterized in that: An anti-retreat step is provided at one end of the anti-rotation pin, which is used for abutting against the first baffle plate after the anti-rotation pin is inserted into the indexing hole, thereby preventing the anti-rotation pin from falling off.

9. The micro-rolling device according to claim 7, characterized in that: A mounting groove is provided on one side of the base away from the protection seat, a blocking plate for blocking the pin hole and the avoidance hole is provided in the mounting groove, and the blocking plate is connected to the mounting seat by connecting screws.

10. The micro-rolling device according to claim 9, characterized in that: The sealing plate is connected to the protection seat by the connecting screws, and a step hole is provided on the base, the large diameter section of the step hole is located on the side close to the protection seat, the small diameter section of the step hole is located on the side away from the protection seat, and the small diameter section of the step hole is provided with an internal thread that can be connected to the threaded section of the connecting screw.

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