Coupling

Abstract

The utility model discloses a coupling, which is used for connecting a first shaft and a second shaft, and comprises a first half coupling, a second half coupling, a third half coupling and a fourth half coupling, the first half coupling is provided with a first mounting hole, the end part of the first shaft is inserted into the first mounting hole, and the first half coupling is detachably connected with the first shaft through a flat key; a second mounting hole is formed in the second half coupling, the end part of the second shaft is inserted into the second mounting hole, and the second half coupling and the second shaft are detachably connected through a connecting pin; a first fastener is arranged between the first half coupling and the second half coupling, and the first half coupling and the second half coupling are connected through the first fastener. The dismounting difficulty of the coupler can be reduced, and the maintenance speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco packaging equipment, in particular to a coupling. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part. It rotates with the shaft during the transmission of motion and power, and will not be separated from the shaft under normal circumstances. Couplings are sometimes also used as a safety device to prevent the connected parts from being subjected to excessive loads, playing the role of overload protection.

[0003] Currently, if Figure 1 As shown, the CH-CT transmission box coupling used in the cigarette packing machine is composed of a cross coupling 101 and a sleeve 102. The left side of the cross coupling 101 is connected to the CH as the power output shaft through a connecting pin, and the right side of the cross coupling 101 is connected to a short shaft 103 through a connecting pin. The right end of the short shaft 103 is connected to the sleeve 102 through a first pin 105, and the right end of the sleeve 102 is connected to the CT side transmission shaft 104 through a second pin 106, thereby transmitting the power of CH to CV and CT. Since the cross coupling 101 is a consumable part, it will be worn during the power transmission process, the transmission is not stable, and the transmission accuracy is not high, resulting in unstable operation of the equipment. At this time, it must be replaced. When replacing, the cross coupling 101 needs to be removed from the short shaft 103. However, since the short shaft 103 and the sleeve 102 are connected by the first pin 105, it is necessary to first remove the first pin 105 by hitting it with a sledgehammer. Due to the small space here, maintenance is not possible, which makes maintenance very difficult. Utility Model Content

[0004] The utility model aims to solve the problem that the shaft sleeve and the shaft are inconvenient to disassemble. The utility model provides a coupling, which can reduce the difficulty of disassembling the coupling and improve the maintenance speed.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides a coupling for connecting a first shaft and a second shaft, and the coupling includes:

[0006] A first half coupling is provided with a first mounting hole, an end portion of the first shaft is inserted into the first mounting hole, and the first half coupling and the first shaft are detachably connected via a flat key;

[0007] A second half coupling is provided with a second mounting hole, an end portion of the second shaft is inserted into the second mounting hole, and the second half coupling and the second shaft are detachably connected via a connecting pin;

[0008] A first fastener is provided between the first half coupling and the second half coupling, and the first half coupling and the second half coupling are connected via the first fastener.

[0009] According to another specific embodiment of the utility model, the first half coupling includes a first flange portion and a first coupling body, the first flange portion is arranged at the end of the first coupling body, the first mounting hole passes through the first flange portion and the first coupling body, a first keyway extending along the axial direction of the first shaft is provided on the circumferential surface of the first shaft, the first keyway is close to one end of the first shaft, and the inner side wall of the first mounting hole is provided with a second keyway extending along the axial direction, and the first keyway and the second keyway are both matched with the flat key; when the first shaft is inserted into the first mounting hole, the flat key is located in the first keyway and the second keyway.

[0010] According to another specific embodiment of the utility model, the first coupling body is further provided with an opening portion, the opening portion is located at one end of the first coupling body away from the first flange portion and extends along the axial direction, and the opening portion is connected to the first mounting hole;

[0011] Connecting ears extending outward from the first connecting body are respectively arranged on both sides of the opening, and the two connecting ears are connected by a second fastener.

[0012] According to another specific embodiment of the present invention, two openings are provided, and the two openings are respectively arranged on both sides of the first mounting hole along the radial direction of the first coupling body.

[0013] According to another specific embodiment of the present invention, the second key groove is located between the two openings, and the distance between the second key groove and the two openings is equal.

[0014] According to another specific embodiment of the present invention, the length of the opening along the axial direction of the first coupling body is half of the length of the first coupling body.

[0015] According to another specific embodiment of the present utility model, the sum of the depths of the first keyway and the second keyway is equal to the height of the flat key.

[0016] According to another specific embodiment of the present invention, the length of the first keyway is 40 mm to 50 mm.

[0017] According to another specific embodiment of the utility model, the second half coupling includes a second flange portion and a second coupling body, the second flange portion is arranged at the end of the second coupling body, and the second mounting hole runs through the second flange portion and the second coupling body.

[0018] A first pin hole is provided on the circumferential surface of the second shaft and penetrates the second shaft in its radial direction. A second pin hole is provided on the circumferential surface of the second coupling body and penetrates the second coupling body in its radial direction. The positions of the first pin hole and the second pin hole correspond to each other. The connecting pin is inserted into the first pin hole and the second pin hole to connect the second coupling body and the second shaft.

[0019] According to another specific embodiment of the utility model, the first flange portion and the second flange portion are respectively provided with a plurality of corresponding threaded holes, and the threaded holes are respectively evenly distributed along the circumference of the first flange portion and the second flange portion; the first fastener is a bolt, and the bolt passes through two corresponding threaded holes to fix the first flange portion and the second flange portion.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] According to the coupling provided by the utility model, the first shaft is inserted into the first mounting hole of the first half coupling and connected to the first half coupling through a flat key, and the second shaft is inserted into the second mounting hole of the second half coupling and connected to the second half coupling through a connecting pin. When in use, the other end of the first shaft is also connected to the cross coupling of the packaging machine. When the first shaft needs to be separated from the second shaft to repair the cross coupling, it is only necessary to loosen the first fastener and slide the first half coupling along the first axial direction away from the second half coupling to separate the first shaft and the second shaft, thereby reducing the difficulty of disassembling the coupling and improving the maintenance speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram showing the structure of a packaging machine coupling in the prior art is shown;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a coupling provided by an embodiment of the utility model is shown;

[0024] Figure 3 An exploded view of a coupling provided by an embodiment of the utility model is shown;

[0025] Figure 4 A cross-sectional view of a coupling provided by an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0026] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0027] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0028] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0030] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] like Figures 2 to 4 As shown, the coupling provided by the utility model is used to connect the first shaft 1 and the second shaft 2. In this embodiment, the coupling includes:

[0033] A first half coupling 3 is provided with a first mounting hole 31, an end of the first shaft 1 is inserted into the first mounting hole 31, and the first half coupling 3 and the first shaft 1 are detachably connected via a flat key 5;

[0034] The second half coupling 4 is provided with a second mounting hole 41, the end of the second shaft 2 is inserted into the second mounting hole 41, and the second half coupling 4 and the second shaft 2 are detachably connected via a connecting pin 6;

[0035] A first fastener 7 is provided between the first half coupling 3 and the second half coupling 4 , and the first half coupling 3 and the second half coupling 4 are connected via the first fastener 7 .

[0036] With this technical solution, the first shaft 1 is inserted into the first mounting hole 31 of the first half coupling 3 and connected to the first half coupling 3 through the flat key 5, and the second shaft 2 is inserted into the second mounting hole 41 of the second half coupling 4 and connected to the second half coupling 4 through the connecting pin 6. When in use, the other end of the first shaft 1 is also connected to the cross coupling of the packaging machine. When the first shaft 1 needs to be separated from the second shaft 2 to repair the cross coupling, it is only necessary to loosen the first fastener 7 and slide the first half coupling 3 along the first shaft 1 in a direction away from the second half coupling 4 to separate the first shaft 1 and the second shaft 2, thereby reducing the difficulty of disassembling the coupling and improving the maintenance speed.

[0037] Specifically, in this embodiment, the first shaft 1 and the second shaft 2 are cylindrical, respectively, and the diameters of the two are equal. One end of the first shaft 1 is used to connect the cross coupling, and the second shaft 2 is used to connect the transmission shaft on the CT side. The first half coupling 3 is provided with a first mounting hole 31 along its axial direction, and the first mounting hole 31 is a through hole, and the other end of the first shaft 1 is used to be inserted into the first mounting hole 31. The second half coupling 4 is provided with a second mounting hole 41 along its axial direction, and the second mounting hole 41 is also a through hole, and the end of the second shaft 2 is used to be inserted into the second mounting hole 41. The inner diameters of the first mounting hole 31 and the second mounting hole 41 are both equal to the outer diameters of the first shaft 1 and the second shaft 2.

[0038] The applicant has found through research that when replacing the cross coupling, since the second shaft 2 on the CT side does not need to be disassembled frequently, the second shaft 2 is configured to be detachably connected to the second half coupling 4 through the connecting pin 6; the first shaft 1 on the cross coupling side needs to be separated from the second shaft 2, so it is connected through a flat key 5. When performing maintenance, the first half coupling 3 can be slid away from the second half coupling 4.

[0039] Furthermore, the first half coupling 3 includes a first flange portion 32 and a first coupling body 33, the first flange portion 32 is arranged at the end of the first coupling body 33, the first mounting hole 31 passes through the first flange portion 32 and the first coupling body 33, and a first key groove 11 extending along its axial direction is provided on the circumferential surface of the first shaft 1, the first key groove 11 is close to the end of the first shaft 1, and the inner side wall of the first mounting hole 31 is provided with a second key groove 34 extending along the axial direction, and the first key groove 11 and the second key groove 34 are both matched with the flat key 5; when the first shaft 1 is inserted into the first mounting hole 31, the flat key 5 is located in the first key groove 11 and the second key groove 34.

[0040] Specifically, the outer side wall of the end of the first shaft 1 inserted into the first mounting hole 31 is provided with a first keyway 11 extending along the axial direction thereof, and its length is consistent with the length of the flat key 5. The inner side wall of the first mounting hole 31 of the first coupling body 33 is provided with a second keyway 34 extending along the axial direction thereof, and the length of the second keyway 34 is shorter than the length of the flat key 5, so that the first coupling can slide along the flat key 5 in a direction away from the second half coupling 4 to separate the first shaft 1 and the second shaft 2, which is convenient for maintenance of the cross coupling. When installing the flat key 5, the two sides of the flat key 5 are respectively located in the first keyway 11 and the second keyway 34 to achieve a snap connection between the first shaft 1 and the first half coupling 3.

[0041] By adopting this technical solution, not only can the connection between the first shaft 1 and the first half coupling 3 be achieved through the clamping method of the flat key 5, but also the installation and disassembly are convenient.

[0042] Optionally, in order to achieve tight assembly, the depth of the first key groove 11 and the second key groove 34 match the height of the flat key 5 , and the sum of their heights is equal to the height of the flat key 5 .

[0043] Optionally, in this embodiment, the length L of the first key groove 11 is 40 mm to 50 mm.

[0044] Furthermore, the first coupling body 33 is further provided with an opening portion 35, which is located at one end of the first coupling body 33 away from the first flange portion 32 and extends in the axial direction, and the opening portion 35 is connected to the first mounting hole 31;

[0045] Connecting ears 36 extending outward from the first connecting shaft 33 are respectively disposed on both sides of the opening 35 , and the two connecting ears 36 are connected by a second fastener.

[0046] Specifically, an opening portion 35 is provided at the end of the first coupling body 33 away from the first flange portion 32, and the opening portion 35 can open the end of the first coupling body 33 at a certain angle to facilitate the installation of the first shaft 1 and the flat key 5 and sliding along the flat key 5 on the first shaft 1 during the disassembly process. Connecting ears 36 extending outward are provided on both sides of the opening portion 35, and the two connecting ears 36 are connected by a second fastener. Exemplarily, the second fastener can be a bolt. When the bolt is tightened, the first mounting hole 31 can hug the first shaft 1, thereby locking the first shaft 1 to enhance the connection tightness between the first half coupling 3 and the first shaft 1.

[0047] Optionally, two openings 35 are provided, and the two openings 35 are respectively provided on both sides of the first mounting hole 31 along the radial direction of the first coupling body 33. More optionally, the length of the opening 35 along the axial direction of the first coupling body 33 is half of the length of the first coupling body 33.

[0048] By adopting this technical solution, by setting two opening portions 35 along the radial direction of the first coupling body 33, the end of the first coupling body 33 can have a better opening degree, so that the first half coupling 3 can be installed on the first shaft 1 more smoothly and slide along the flat key 5 on the first shaft 1.

[0049] Furthermore, the second key groove 34 is located between the two openings 35 , and the distance between the second key groove 34 and the two openings 35 is equal.

[0050] By adopting this technical solution, the second keyway 34 is arranged to be far away from the opening 35 , so that the shear force of the flat key 5 connection can be ensured and the service life of the first coupling body 33 can be increased.

[0051] Furthermore, the second half coupling 4 includes a second flange portion 42 and a second coupling body 43, the second flange portion 42 is arranged at the end of the second coupling body 43, and the second mounting hole 41 runs through the second flange portion 42 and the second coupling body 43.

[0052] A first pin hole 21 is provided on the circumferential surface of the second shaft 2 and penetrates the second shaft 2 along its radial direction. A second pin hole 44 is provided on the circumferential surface of the second connecting shaft body 43 and penetrates the second connecting shaft body 43 along its radial direction. The positions of the first pin hole 21 and the second pin hole 44 correspond to each other. The connecting pin 6 is inserted into the first pin hole 21 and the second pin hole 44 to connect the second connecting shaft body 43 and the second shaft 2.

[0053] Specifically, in this embodiment, the connecting pin 6 is cylindrical. The second shaft 2 and the second coupling body 43 are respectively provided with a first pin hole 21 and a second pin hole 44 that match the connecting pin 6. When the connecting pin 6 is used to connect and fix the second shaft 2 and the second coupling body 43 of the second half coupling 4, the connecting pin 6 is inserted through the first pin hole 21 and the second pin hole 44 to achieve the connection between the second half coupling 4 and the second shaft 2.

[0054] Furthermore, the first flange portion 32 and the second flange portion 42 are respectively provided with a plurality of corresponding threaded holes, each of which is evenly distributed along the circumference of the first flange portion 32 and the second flange portion 42; the first fastener 7 is a bolt, which passes through two corresponding threaded holes to fix the first flange portion 32 and the second flange portion 42.

[0055] Specifically, a plurality of matching threaded holes are provided on the first flange portion 32 and the second flange portion 42, and the plurality of threaded holes are evenly distributed in a ring shape. Bolts pass through the corresponding threaded holes on the first flange portion 32 and the second flange portion 42 to fix the first half coupling 3 and the second half coupling 4. With this technical solution, the first half coupling 3 and the second half coupling 4 can be easily disassembled and assembled.

[0056] The coupling provided by the utility model can reduce the difficulty of disassembling the coupling and improve the maintenance speed.

[0057] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A coupling for connecting a first shaft and a second shaft, characterized in that: The coupling comprises: A first half coupling is provided with a first mounting hole, an end portion of the first shaft is inserted into the first mounting hole, and the first half coupling and the first shaft are detachably connected via a flat key; A second half coupling is provided with a second mounting hole, an end portion of the second shaft is inserted into the second mounting hole, and the second half coupling and the second shaft are detachably connected via a connecting pin; A first fastener is provided between the first half coupling and the second half coupling, and the first half coupling and the second half coupling are connected via the first fastener.

2. The coupling according to claim 1, characterized in that: The first half coupling includes a first flange portion and a first coupling body, the first flange portion is arranged at the end of the first coupling body, the first mounting hole passes through the first flange portion and the first coupling body, a first keyway extending along the axial direction thereof is provided on the circumferential surface of the first shaft, the first keyway is close to one end of the first shaft, and a second keyway extending along the axial direction is provided on the inner side wall of the first mounting hole, the first keyway and the second keyway both match the flat key; when the first shaft is inserted into the first mounting hole, the flat key is located in the first keyway and the second keyway.

3. The coupling according to claim 2, characterized in that: The first coupling body is further provided with an opening portion, the opening portion is located at one end of the first coupling body away from the first flange portion and extends along the axial direction, and the opening portion is connected to the first mounting hole; Connecting ears extending outward from the first coupling body are respectively provided on both sides of the opening, and the two connecting ears are connected by a second fastener.

4. The coupling according to claim 3, characterized in that: The two openings are provided, and the two openings are respectively arranged on both sides of the first mounting hole along the radial direction of the first coupling body.

5. The coupling according to claim 4, characterized in that: The second key groove is located between the two openings, and the distance between the second key groove and the two openings is equal.

6. The coupling according to claim 3, characterized in that: The length of the opening along the axial direction of the first coupling body is half the length of the first coupling body.

7. The coupling according to claim 2, characterized in that: The sum of the depths of the first keyway and the second keyway is equal to the height of the flat key.

8. The coupling according to claim 2, characterized in that: The length of the first keyway is 40 mm to 50 mm.

9. The coupling according to claim 2, characterized in that: The second half coupling includes a second flange and a second coupling body, wherein the second flange is disposed at an end of the second coupling body, and the second mounting hole penetrates the second flange and the second coupling body. A first pin hole is provided on the circumferential surface of the second shaft and penetrates the second shaft along its radial direction, and a second pin hole is provided on the circumferential surface of the second coupling body and penetrates the second coupling body along its radial direction. The positions of the first pin hole and the second pin hole correspond to each other, and the connecting pin is inserted into the first pin hole and the second pin hole to connect the second coupling body and the second shaft.

10. The coupling according to claim 9, characterized in that: The first flange portion and the second flange portion are respectively provided with a plurality of corresponding threaded holes, and the threaded holes are respectively evenly distributed along the circumference of the first flange portion and the second flange portion; the first fastener is a bolt, and the bolt passes through two corresponding threaded holes to fix the first flange portion and the second flange portion.

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