Shaft sleeve for coupler and coupler

Abstract

The shaft sleeve comprises a shaft sleeve body, a shaft hole extending to the two ends is formed in the center of the shaft sleeve body, and a first clamping part and a second clamping part which can be held tightly in the radial direction are arranged on the shaft sleeve body on the outer side of the shaft hole. The first clamping part and the second clamping part are fixedly locked and connected through a bolt, bolt holes for placing the bolt are formed in the first clamping part and the second clamping part, a positioning pin is arranged on the shaft sleeve main body, the positioning pin penetrates through the bolt holes, and the positioning pin and the head of the bolt in a locked state are distributed at intervals; the positioning pin is located on the motion trail of the bolt and can prevent the bolt from moving backwards. Through the application of the positioning pin, the bolt is ensured to be always in a stable state in the use process and cannot fly out due to operation vibration of the coupler or other factors; and meanwhile, due to the limitation of the positioning pin, the stress of the bolt can act on the first clamping part and the second clamping part, so that the first clamping part and the second clamping part are held tightly or opened, and the shaft assembling convenience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of couplings and relates to a shaft sleeve used on a coupling and a coupling. Background Art

[0002] As an important component for connecting two shafts to transmit torque, the performance and reliability of the coupling are of vital importance. In existing couplings, the sleeve is usually clamped by screws.

[0003] This clamping method has some obvious problems in actual use. On the one hand, the locking screw has a chance to fly out. When the coupling is running at high speed or subjected to large vibrations, the screw may loosen and gradually lose its tightening force, eventually causing it to fly out. This will not only cause safety hazards to surrounding equipment and personnel, but may also cause equipment failures and affect the normal production process.

[0004] On the other hand, when the coupling needs to be disassembled, the sleeve and the shaft are often clamped together, making the disassembly of the sleeve extremely inconvenient. This is because during long-term use, friction, wear and corrosion may occur between the shaft and the sleeve, and the screw clamping method may make the sleeve and the shaft more tightly connected. Disassembly requires a lot of time and effort, and may even require the use of professional tools and equipment, which increases maintenance costs and work difficulty. Moreover, during the disassembly process, if the operation is improper, it may also cause damage to the shaft and sleeve, further affecting the service life and performance of the coupling.

[0005] In summary, the existing coupling sleeve adopts the screw clamping method, which has the risk of the locking screw flying out and the problem of inconvenience in disassembly. There is an urgent need for a coupling sleeve design that is safer, more reliable and easier to disassemble to meet the needs of practical applications. Utility Model Content

[0006] The utility model aims to provide a shaft sleeve and a shaft coupling for a coupling, and solves at least one technical problem in the background technology by improving the existing shaft sleeve structure.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A shaft sleeve for a coupling comprises a shaft sleeve body, wherein an axial hole extending to both ends is opened at the center of the shaft sleeve body, and a first clamping part and a second clamping part which can be radially clamped are provided on the shaft sleeve body at the outer side of the axial hole, and the first clamping part and the second clamping part are connected by bolt locking, and the first clamping part and the second clamping part are provided with bolt holes for placing the bolts, and a locating pin is provided on the shaft sleeve body, and the locating pin passes through the bolt hole and is spaced apart from the bolt head in the locked state, and the locating pin is located on the movement trajectory of the bolt and can prevent the bolt from moving backward.

[0009] As a further improvement of an embodiment of the utility model, there are two bolt holes distributed on both sides of the shaft hole, and a bolt head mounting groove is opened at one end of each bolt hole, and the positioning pin is inserted into the bolt head mounting groove from top to bottom.

[0010] As a further improvement of one embodiment of the utility model, a locating pin hole for placing a locating pin is provided on the sleeve body, one end of the locating pin hole is exposed on the upper end surface of the sleeve body, and the other end of the locating pin hole is located below the bolt head mounting groove.

[0011] As a further improvement of an embodiment of the utility model, the positioning pin hole is axially arranged.

[0012] As a further improvement of an embodiment of the utility model, the side end of the shaft hole is provided with a first slit and a second slit extending outward, and the first slit and the second slit both extend to the outer end of the sleeve body, and the side end of the sleeve body is provided with a third slit and a fourth slit arranged opposite to each other, the lower end of the first slit is connected to the third slit, and the lower end of the second slit is connected to the fourth slit; the shaft hole and the first slit, the second slit, the third slit and the fourth slit are surrounded to form the first clamping portion and the second clamping portion.

[0013] As a further improvement of one embodiment of the utility model, the bolt hole is bounded by the first slit or the second slit, the bolt hole on the side close to the bolt head mounting groove has no internal thread, and the bolt hole on the side away from the bolt head mounting groove is provided with an internal thread engaging with the bolt.

[0014] As a further improvement of an embodiment of the utility model, the bolt head has a hexagonal groove, and the installation position of the locating pin avoids the hexagonal groove.

[0015] As a further improvement of an embodiment of the utility model, the first slit and the second slit are located in the same straight line.

[0016] As a further improvement of an embodiment of the utility model, the third slit and the fourth slit are arranged horizontally and at the same height.

[0017] A coupling is a plum blossom type coupling or a diaphragm type coupling, and adopts a shaft sleeve with the above structure.

[0018] The adoption of the above technical solution has the following beneficial effects: through the application of the locating pin, it is ensured that the bolt is always in a stable state during use and will not fly out due to the operation vibration of the coupling or other factors; at the same time, restricted by the locating pin, the force of the bolt can act on the first clamping part and the second clamping part, so that the two are clamped or opened, thereby improving the convenience of shaft assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 The utility model is a three-dimensional schematic diagram of the shaft sleeve provided by the utility model.

[0022] Figure 2 This is a top view schematic diagram of the shaft sleeve provided by the utility model.

[0023] Figure 3 The utility model is provided with a plum blossom type coupling assembly stereoscopic schematic diagram.

[0024] Figure 4 The utility model is provided with a diaphragm type coupling assembly schematic diagram.

[0025] In the figure:

[0026] 1- bushing;

[0027] 11-sleeve body; 111-first clamping part; 112-second clamping part;

[0028] 12-axis hole;

[0029] 13- first slit;

[0030] 14- second slit;

[0031] 15- the third slit;

[0032] 16- the fourth slit;

[0033] 17-first bolt hole;

[0034] 18-second bolt hole;

[0035] 19-1, 19-2-Location pin holes.

[0036] 2-Location pin;

[0037] 3- Bolts;

[0038] 4-Axis. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0041] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention. Example

[0042] See also Figure 1-Figure 2 As shown, a shaft sleeve 1 used on a coupling is intended to solve the problems existing in the use of the existing coupling shaft sleeve.

[0043] The sleeve mainly includes a sleeve body 11, and an axial hole 12 extending to both ends is opened at the center of the sleeve body 11. The axial hole is used to install the shaft to realize the transmission function of the coupling. The sleeve body 11 located outside the axial hole 12 has a first clamping part 111 and a second clamping part 112 that can be radially clamped. The two clamping parts are locked and connected by bolts 3, and bolt holes for the bolts 3 to be placed are provided on the first clamping part 111 and the second clamping part 112.

[0044] In order to effectively prevent the bolt 3 from flying out during use, the sleeve is specially provided with a positioning pin 2. The positioning pin 2 on the sleeve body 11 passes through the bolt hole and is spaced apart from the bolt head when the bolt is in a locked state. The positioning pin 2 is located on the movement trajectory of the bolt 3. When the bolt has a tendency to move backward, the positioning pin 2 can play a blocking role, thereby ensuring that the bolt 3 is always in a stable state during use and will not fly out due to the operation vibration of the coupling or other factors. This design greatly improves the safety of the coupling and avoids possible damage to surrounding equipment and personnel caused by the bolt flying out.

[0045] Specifically, the number of bolt holes in this embodiment is two, namely, a first bolt hole 17 and a second bolt hole 18. The two bolt holes are distributed on both sides of the shaft hole 12, and can provide a stable fastening force for the clamping of the sleeve body 11. A bolt head mounting groove is provided at one end of each bolt hole, and the bolt 3 is inserted from the bolt head mounting groove. This design makes the installation of the bolt more convenient and can also ensure that the bolt will not deviate during use.

[0046] The locating pin 2 is inserted into the bolt head installation groove from top to bottom, playing a key role in preventing the bolt from flying out. The sleeve body 11 is provided with locating pin holes 19-1 and 19-2 for placing the locating pin 2. One end of the locating pin holes 19-1 and 19-2 is exposed on the upper end surface of the sleeve body 11, which is convenient for installing the locating pin. The other end is located below the bolt head installation groove, so that the locating pin can accurately block the backward movement of the bolt.

[0047] The locating pin 2 is installed in the corresponding locating pin hole by interference fit. The interference fit can ensure that the locating pin is firmly positioned after installation, and the locating pin will not loosen or fall off even when the coupling is running at high speed or subjected to large vibration. This stable installation method provides reliable guarantee for the safe operation of the coupling.

[0048] Preferably, the locating pin holes 19-1 and 19-2 are axially arranged. This axially arranged structure has many advantages. First, it is convenient for processing the locating pin holes, which can reduce the processing difficulty and cost during the manufacturing process and improve production efficiency. Secondly, for the assembly of the locating pin 2, the axial arrangement makes the assembly process smoother, can ensure that the locating pin is accurately inserted into the locating pin hole, and improves the accuracy and reliability of the assembly.

[0049] Specifically, the side end of the shaft hole 12 is provided with a first slit 13 and a second slit 14 extending outward. Both slits extend to the outer end of the sleeve body 11, so that the sleeve can better adapt to the size change of the shaft during installation and use, and also provide a basis for the formation of the clamping part.

[0050] The side end of the sleeve body 11 is also provided with a third slit 15 and a fourth slit 16 which are arranged opposite to each other. The lower end of the first slit 13 is connected to the third slit 15, and the lower end of the second slit 14 is connected to the fourth slit 16. Through such a design, the shaft hole 12 and the first slit 13, the second slit 14, the third slit 15 and the fourth slit 16 are surrounded to form a first clamping part 111 and a second clamping part 112. Under the action of the bolt 3, these two clamping parts can tightly hold the shaft to ensure the effective transmission of torque.

[0051] Among them, the first slit 13 and the second slit 14 are in the same straight line. This design allows the sleeve to be more evenly stressed when clamping the shaft, thereby improving the stability of clamping. The third slit 15 and the fourth slit 16 are arranged horizontally and at the same height, so that the structure of the entire sleeve is more regular and convenient for processing and installation. At the same time, the first slit 13 and the third slit 15 are at a right angle of 90 degrees, and the second slit 14 and the fourth slit 16 are also at a right angle of 90 degrees. This right-angle structure not only increases the strength and stability of the sleeve, but also enables the clamping part to better resist torque and vibration when clamping the shaft. In actual use, this structural design can effectively improve the working efficiency and reliability of the coupling and reduce the occurrence of equipment failures.

[0052] In this embodiment, the bolt hole is bounded by the first slit 13 or the second slit 14, presenting different structural features. The bolt hole close to the bolt head installation slot has no internal thread, which makes the bolt insertion smoother and reduces the resistance during installation. The bolt hole away from the bolt head installation slot is provided with an internal thread that meshes with the bolt 3. This design can ensure that the bolt is tightly combined with the sleeve body after tightening, providing a stable clamping force for the first clamping portion 111 and the second clamping portion 112.

[0053] The bolt head has a hexagonal groove, which is convenient for the staff to use tools for installation and removal operations. At the same time, the installation position of the positioning pin 2 deliberately avoids the hexagonal groove, which will not affect the installation and removal of the bolt, and can give full play to the role of the positioning pin to prevent the bolt from flying out during use.

[0054] When the sleeve 1 needs to be removed from the shaft, the staff can use the corresponding tools to rotate the bolt 3. In the process of rotating the bolt 3, due to the position restriction of the positioning pin 2, the bolt 3 cannot be completely withdrawn, but will push the first clamping part 111 and the second clamping part 112 to gradually open. As the clamping parts open, the clamping force between the sleeve and the shaft gradually decreases, making it easier to remove the shaft from the sleeve 1. This disassembly method is simple and convenient, without the need for complex tools and equipment, and greatly improves the maintenance efficiency of the sleeve.

[0055] In summary, the bolt 3 connects the first clamping portion 111 and the second clamping portion 112, so that the sleeve 1 can firmly hold the shaft, ensuring effective transmission of torque. During installation and removal, the sleeve and the shaft can be quickly installed and removed by operating the bolt 3 and the positioning pin 2, thereby improving work efficiency.

[0056] like Figure 3 A plum blossom type coupling assembly structure as shown and Figure 4 The diaphragm type coupling assembly structures shown all use the shaft sleeve 1 in this embodiment. The application of this shaft sleeve brings many advantages to the assembly and use of the coupling.

[0057] During the assembly process, first insert one end of the shaft 4 into the shaft hole of the sleeve 1. The size of the shaft hole has been carefully designed to fit closely with the shaft 4 to ensure the stability of the connection. Then, screw the bolt 3 into the corresponding bolt hole and tighten it. The reasonable distribution and design of the bolt holes can provide uniform clamping force for the sleeve, so that the sleeve can firmly hold the shaft 4. After tightening the bolt 3, assemble the locating pin 2. The installation of the locating pin 2 can effectively prevent the bolt 3 from flying out during use. At the same time, the installation of the locating pin 2 will not affect the normal operation of the coupling, ensuring the reliability and safety of the coupling.

[0058] After the above steps, the assembly of the coupling is completed. During use, the coupling using the new sleeve 1 can effectively avoid the risk of bolts flying out. Due to the presence of the locating pin 2, the bolt 3 will not loosen or fly out even when the coupling is running at high speed or subjected to large vibrations, thereby avoiding safety hazards to surrounding equipment and personnel. In addition, when the coupling needs to be disassembled, the design of this sleeve also makes the disassembly process more convenient. The staff only needs to loosen the bolt 3 to easily remove the sleeve from the shaft 4. Compared with the traditional coupling sleeve, this design greatly reduces the difficulty and workload of disassembly and improves maintenance efficiency.

[0059] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0062] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A shaft sleeve for a coupling, comprising a shaft sleeve body, wherein a shaft hole extending to both ends is opened at the center of the shaft sleeve body, characterized in that: The shaft sleeve body where the outer side of the shaft hole is located has a first clamping part and a second clamping part that can be radially clamped, and the first clamping part and the second clamping part are connected by bolt locking, and the first clamping part and the second clamping part are provided with bolt holes for placing the bolts, and the shaft sleeve body is provided with a positioning pin, which passes through the bolt hole and is spaced apart from the bolt head in the locked state, and the positioning pin is located on the movement trajectory of the bolt and can prevent the bolt from moving backward.

2. The sleeve according to claim 1, characterized in that: There are two bolt holes distributed on both sides of the shaft hole. A bolt head mounting groove is provided at one end of each bolt hole, and the positioning pin is inserted into the bolt head mounting groove from top to bottom.

3. The sleeve according to claim 2, characterized in that: The shaft sleeve body is provided with a positioning pin hole for placing the positioning pin, one end of the positioning pin hole is exposed on the upper end surface of the shaft sleeve body, and the other end of the positioning pin hole is located below the bolt head installation groove.

4. The sleeve according to claim 3, characterized in that: The positioning pin hole is arranged axially.

5. The sleeve according to claim 2, characterized in that: The side end of the shaft hole is provided with a first slit and a second slit extending outward, and the first slit and the second slit both extend to the outer end of the sleeve body; the side end of the sleeve body is provided with a third slit and a fourth slit arranged opposite to each other, the lower end of the first slit is connected to the third slit, and the lower end of the second slit is connected to the fourth slit; the shaft hole and the first slit, the second slit, the third slit and the fourth slit are surrounded to form the first clamping portion and the second clamping portion.

6. The sleeve according to claim 5, characterized in that: The bolt hole is bounded by the first slit or the second slit, the bolt hole on the side close to the bolt head installation groove has no internal thread, and the bolt hole on the side away from the bolt head installation groove is provided with an internal thread engaged with the bolt.

7. The sleeve according to claim 6, characterized in that: The bolt head has a hexagonal groove, and the installation position of the locating pin avoids the hexagonal groove.

8. The sleeve according to claim 7, characterized in that: The first slit and the second slit are located on the same straight line.

9. The sleeve according to claim 7, characterized in that: The third slit and the fourth slit are arranged horizontally and at the same height.

10. A coupling, the coupling being a plum blossom coupling or a diaphragm coupling, characterized in that: A bushing according to any one of claims 1 to 9 is used.

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