Bidirectional transmission coupling mechanism suitable for compact space

Abstract

The application belongs to the technical field of mechanical design and relates to a bidirectional transmission coupling mechanism suitable for a compact space, which comprises a coupling mechanism, the coupling mechanism comprising a hollow single coupling, an outer hexagonal connecting sleeve and a positioning rod, an inner surface of the hollow single coupling being provided with an internal thread and being fixedly connected with one end of the positioning rod through the internal thread, an inner recessed hexagon for connecting the outer hexagonal connecting sleeve being arranged at an end of the hollow single coupling away from the positioning rod, and a key groove being arranged on the outer side of the hollow single coupling to connect a rotating shaft; the outer hexagonal connecting sleeve is of a stepped structure, a small-diameter end of the outer hexagonal connecting sleeve being an outer hexagon matched with the inner recessed hexagon, a center of a large-diameter end of the outer hexagonal connecting sleeve being provided with a flat square through hole to connect an external device, the external device being provided with an external connecting rod matched with the flat square through hole, a screw hole being arranged on one side of the outer hexagonal connecting sleeve and being perpendicular to and communicating with the flat square through hole, and a screw being arranged in the screw hole to press the external connecting rod.

Description

Technical Field

[0001] This invention belongs to the field of mechanical design technology and relates to a bidirectional transmission coupling mechanism suitable for compact spaces. Background Technology

[0002] Couplings are mechanical parts used to connect two rotating shafts or two rotating components to achieve synchronous transmission. They are widely used in mechanical equipment for the transmission connection of shafts or rotating components, and while transmitting torque, they also reduce vibration and mitigate impact. Common couplings consist of two connecting devices, one for each of the left and right rotating shafts or components. However, this connection method, or common couplings, occupies a large axial space, making them unsuitable for couplings in compact spaces. In the application field of coal mine drilling rigs, due to the size limitations of these rigs, there is an urgent need for a coupling mechanism that can be used in compact spaces and occupies less axial space. Therefore, a bidirectional transmission coupling mechanism suitable for compact spaces is provided. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a bidirectional transmission coupling mechanism suitable for compact spaces, so as to solve the problem that existing couplings occupy a large space and are not suitable for coupling in compact spaces.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A bidirectional transmission coupling mechanism suitable for compact spaces is characterized by comprising a coupling mechanism including a hollow single-unit coupling, an external hexagonal connecting sleeve, and a positioning rod. The inner surface of the hollow single-unit coupling is provided with an internal thread, and is fixedly connected to one end of the positioning rod through the internal thread. The end of the hollow single-unit coupling away from the positioning rod is provided with an inwardly recessed hexagonal for connecting the external hexagonal connecting sleeve, and a keyway is provided on the outer side of the hollow single-unit coupling to connect a rotating shaft through the keyway.

[0006] The external hexagonal connecting sleeve has a stepped structure. Its small-diameter end is an external hexagon that matches the concave hexagonal end to connect to the hollow single-unit coupling. The center of the large-diameter end is provided with a flat square through hole to connect to an external device. The external device has an external rod that matches the flat square through hole on the side near the external hexagonal connecting sleeve. On one side of the external hexagonal connecting sleeve, there is a screw hole perpendicular to the flat square through hole. The screw hole communicates with the flat square through hole. A screw is provided in the screw hole to press the external rod inserted into the flat square through hole.

[0007] This bidirectional transmission coupling mechanism uses a hollow, cylindrical single-unit coupling to nest the rotating shaft via an outer keyway. It then connects the outer hexagonal connecting sleeve via an inner hexagonal nested connection, and finally connects the external device through a flat square through-hole in the outer hexagonal connecting sleeve. This achieves the connection between the external device and the rotating shaft. By adopting a nested connection method, it saves a great deal of installation space in both the axial and longitudinal directions, solving the problem that existing couplings occupy a large amount of space and are not suitable for coupling in compact spaces.

[0008] The hollow single coupling is cylindrical in shape. Its internal structure includes an internal thread in the middle section, an inwardly concave hexagon near the end of the external hexagonal connecting sleeve, and a sealing surface near the end of the positioning rod. A sealing ring is provided between the sealing surface and the positioning rod.

[0009] Furthermore, the bidirectional transmission coupling mechanism also includes a housing and a rotating shaft. The rotating shaft is a hollow structure. One end of the rotating shaft is connected to a hollow single-unit coupling via a key that matches the keyway. The end of the positioning rod away from the hollow single-unit coupling passes through the rotating shaft along its axial direction. A flange is provided on the end of the positioning rod away from the hollow single-unit coupling, and the rotating shaft is fixedly connected via the flange. Bearings for rotatably connecting the rotating shaft are fitted inside both ends of the housing to support the rotating shaft and the coupling mechanism.

[0010] By connecting one end of the positioning rod to a hollow single-unit connecting shaft and the other end to a rotating shaft, the external device is axially fixed on the rotating shaft, thereby transmitting the impact on the external device to the housing, greatly reducing the impact caused by vibration on the external device and extending its service life.

[0011] Furthermore, bearing end caps for fixing the bearings are provided at both ends of the housing.

[0012] Furthermore, the bidirectional transmission coupling mechanism also includes an external device, which is fixedly connected to one end of the housing near the outer hexagonal connecting sleeve, and the external device near the outer hexagonal connecting sleeve has an external rod that matches the flat square through hole.

[0013] Furthermore, the external device is a load mechanism or a prime mover.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention provides a bidirectional transmission coupling mechanism, which uses a cylindrical hollow single-unit coupling in conjunction with a hollow rotating shaft. The rotating shaft is nested together through an outer keyway, and an outer hexagonal connecting sleeve is nested together through an inner hexagonal connecting sleeve. An external device is then connected through a flat square through hole in the outer hexagonal connecting sleeve, thereby achieving the connection between the external device and the rotating shaft. By adopting a nested connection method, a great deal of installation space is saved in both the axial and longitudinal directions, solving the problem that existing couplings occupy a large amount of space and are not suitable for coupling in compact spaces.

[0016] Secondly, by connecting one end of the positioning rod to a hollow single-unit connecting shaft and the other end to a rotating shaft, the external device is axially fixed on the rotating shaft. This transfers the impact on the external device to the housing, significantly reducing the impact caused by vibration and extending its service life. Furthermore, by selecting different external devices to work with forward and bidirectional transmission coupling mechanisms, bidirectional transmission of this coupling mechanism is achieved. This allows the power of the external device, acting as a prime mover, to be transmitted to the rotating shaft, and the power of the rotating shaft to be transmitted to the external device, acting as a load mechanism.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of a bidirectional transmission coupling mechanism suitable for compact spaces according to the present invention;

[0020] Figure 2 This is a schematic diagram of the hollow single-unit coupling in this invention;

[0021] Figure 3 This is a schematic diagram of the structure of the hexagonal connecting sleeve in this invention.

[0022] Reference numerals in the attached drawings: 1. Housing; 2. Bearing; 3. Rotating shaft; 4. Hollow single coupling; 5. Bearing end cover; 6. Screw; 7. External hexagonal connecting sleeve; 8. External device; 9. Key; 10. Positioning rod; 401. Keyway; 402. Internal thread; 403. Internal concave hexagon; 404. Sealing surface; 701. External hexagon; 702. Flat square through hole; 703. Screw hole; 11. O-ring seal. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Please see Figures 1-3 This is a bidirectional transmission coupling mechanism suitable for compact spaces. It occupies relatively little space in both the axial and longitudinal directions, especially saving a great deal of installation space in the axial direction. It includes a hollow single coupling 4, an external hexagonal connecting sleeve 7, and a positioning rod 10. The hollow single coupling 4 is cylindrical in shape, and one end is provided with an internal thread 402 that is threaded to one end of the positioning rod 10. The other end is provided with an internal concave hexagon 403 for connecting the external hexagonal connecting sleeve 7. A keyway 401 is provided on the outside of the hollow single coupling 4 to connect the rotating shaft 3.

[0027] The external hexagonal connecting sleeve 7 has a two-stage stepped structure. Its small-diameter end is an external hexagon 701 that matches the concave hexagon 403. The center of the large-diameter end is provided with a flat square through hole 702 to connect the external device 8. On one side of the external hexagonal connecting sleeve 7 and at the position corresponding to the flat square through hole 702, there is a screw hole 703 perpendicular to the flat square through hole 702. A screw 6 is screwed into the screw hole 703 to press the external rod inserted into the flat square through hole, thereby restricting the displacement of the external device 8 in the axial direction.

[0028] Specifically, the internal structure of the hollow single coupling 4 includes an internal thread 402 in the middle section, an inner concave hexagon 403 near the outer hexagonal connecting sleeve 7, and a sealing surface 404 near the positioning rod 10. The sealing surface 404 matches the outer edge of the positioning rod 10 and cooperates with the O-ring 11 set between the sealing surface 404 and the positioning rod 10 to form a sealing structure, thereby preventing the lubricating oil in the housing 1 from leaking out.

[0029] The positioning rod 10 is a solid stepped shaft. Its right end is inserted into the center hole of the hollow single coupling 4 and is provided with external thread. It is threadedly connected to the hollow single coupling 4 to restrict the axial movement of the hollow single coupling 4. A flange is provided at the left end. The flange is provided with screw holes. The flange located at the left end of the positioning rod 10 is fixedly connected to the rotating shaft 3 with screws.

[0030] Specifically, the bidirectional transmission coupling mechanism also includes a housing 1, a rotating shaft 3, bearings 2, and a key 9. The housing 1 is used to mount the coupling mechanism. Two bearings 2 are installed inside the housing, which are symmetrical. The rotating shaft 3 is installed at the center of the bearings 2. The rotating shaft 3 is a hollow structure used to transmit torque. The inner surface of its right end has a groove that matches the keyway 401 for connecting the key 9, so as to form a key connection between the rotating shaft 3 and the hollow single coupling 4, thereby forming a coupling, and transmitting torque between the rotating shaft 3 and the hollow single coupling 4 through the key 9.

[0031] The rotating shaft 3 can serve as either a driven shaft or a driving shaft, and its outer edge is provided with a transmission mechanism, such as an external gear ring, that connects to a gear transmission mechanism. The external device 8 can be a prime mover (such as a drive motor), which provides power to the rotating shaft 3 through a coupling mechanism (including a hollow single coupling 4, an external hexagonal connecting sleeve 7, and a positioning rod 10), and then provides power to the transmission mechanism in the housing 1 through the rotating shaft 3. Alternatively, it can be a load mechanism that receives the power output from the housing 1 transmitted sequentially through the rotating shaft 3 and the coupling mechanism. The external device 8 has an external rod (serving as an output or shaft input shaft) that matches the flat square through hole 702 in the external hexagonal connecting sleeve 7. The external rod is inserted into the flat square through hole 702 to output or receive power.

[0032] Preferably, bearing end caps for fixing bearings are provided at both ends of the housing. The bearing end caps 5 are fixedly connected to the housing 1 by screws 6, and a sealing ring is provided between the housing 1 and the bearing end caps 5. The external device 8 is fixedly connected to the bearing end cap 5 at one end of the housing 1 near the external hexagonal connecting sleeve 7 by screws 6.

[0033] Preferably, the hollow single coupling 4 has a stepped annulus with an inner diameter matching the outer diameter of the large diameter end of the outer hexagonal connecting sleeve 7 at one end, so as to nest the outer hexagonal connecting sleeve 7, and a step is formed on the side away from the outer hexagonal connecting sleeve 7 to restrict the axial position of the rotating shaft 3.

[0034] The working principle of the above-mentioned bidirectional transmission coupling mechanism is as follows:

[0035] Torque transmission process from right to left: At this time, the external device 8 is the prime mover, generating a certain torque. This torque is transmitted to the external hexagonal connecting sleeve 7 through the external rod (output shaft) at the left end of the external device 8. The external hexagonal connecting sleeve 7 transmits the torque to the hollow single coupling 4. The hollow single coupling 4 continues to transmit the torque to the rotating shaft 3. The rotating shaft 3 rotates, and the torque is transmitted from the outside to the inside of the housing 1.

[0036] Torque transmission process from left to right: At this time, the housing 1 is used as the power source. The torque is transmitted from the rotating shaft 3 to the hollow single-unit connecting shaft 4, then from the hollow single-unit connecting shaft 4 to the outer hexagonal connecting sleeve 7, then from the outer hexagonal connecting sleeve 7 to the external device 8, and finally drives the external device 8 to rotate.

[0037] During its operation, the positioning rod 10 is connected to the hollow single connecting shaft 4 at one end and the rotating shaft 3 at the other end, thereby axially fixing the external device 8 on the rotating shaft 3, so as to transmit the impact of the external device 8 to the housing 1, greatly reducing the impact of vibration on the external device 8 and extending its service life.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A bidirectional transmission coupling mechanism suitable for compact spaces, characterized in that: The coupling mechanism includes a hollow single-unit coupling, an external hexagonal connecting sleeve, and a positioning rod. The inner surface of the hollow single-unit coupling is provided with an internal thread, and it is fixedly connected to one end of the positioning rod through the internal thread. The end of the hollow single-unit coupling away from the positioning rod is provided with an inwardly concave hexagonal part for connecting the external hexagonal connecting sleeve, and a keyway is provided on the outer side of the hollow single-unit coupling to connect a rotating shaft through the keyway. The external hexagonal connecting sleeve has a stepped structure. Its small-diameter end is an external hexagon that matches the concave hexagonal end to connect to the hollow single-unit coupling. The center of the large-diameter end is provided with a flat square through hole to connect to an external device. The external device has an external rod that matches the flat square through hole on the side near the external hexagonal connecting sleeve. On one side of the external hexagonal connecting sleeve, there is a screw hole perpendicular to the flat square through hole. The screw hole communicates with the flat square through hole. A screw is provided in the screw hole to press the external rod inserted into the flat square through hole. The hollow single coupling is cylindrical in shape. Its internal structure includes an internal thread in the middle section, an internal concave hexagon near the end of the external hexagonal connecting sleeve, and a sealing surface near the end of the positioning rod. A sealing ring is provided between the sealing surface and the positioning rod. It also includes a housing and a rotating shaft. The rotating shaft is a hollow structure. One end of the rotating shaft is connected to a hollow single-unit coupling via a key that matches the keyway. The end of the positioning rod away from the hollow single-unit coupling passes through the rotating shaft along the axial direction. A flange is provided on the end of the positioning rod away from the hollow single-unit coupling, and the rotating shaft is fixedly connected via the flange. The two ends of the housing are fitted with bearings for rotatably connecting the rotating shaft to support the rotating shaft and the coupling mechanism.

2. The bidirectional transmission coupling mechanism suitable for compact spaces according to claim 1, characterized in that: Bearing end caps for fixing the bearings are also provided at both ends of the housing.

3. The bidirectional transmission coupling mechanism suitable for compact spaces according to claim 1, characterized in that: It also includes an external device, which is fixedly connected to one end of the housing near the outer hexagonal connecting sleeve, and the external device near the outer hexagonal connecting sleeve has an external rod that matches the flat square through hole.

4. The bidirectional transmission coupling mechanism suitable for compact spaces according to any one of claims 1 to 3, characterized in that: The external device is a load mechanism or a prime mover.

Images