Structure suitable for key fixing and transmission mechanism

Abstract

The utility model relates to the technical field of machining, and provides a structure suitable for key fixation and a transmission mechanism, the structure comprises a fixing plate, the fixing plate is provided with a first through hole and a second through hole; the key is assembled in a key groove formed between the transmission part and the shaft, a first inner threaded hole is formed in the outer end face of the key, and a second inner threaded hole is formed in the outer end face of the transmission part. One end of the fixing plate is detachably fixed to the key through a first connecting piece, and the other end of the fixing plate is detachably fixed to the transmission piece through a second connecting piece. The end face of the key and the end face of the transmission piece are connected through the designed fixing plate, the fixing plate can effectively fix and limit the key, risks caused by easy outward movement are effectively prevented, potential safety hazards caused by movement of the key are avoided, the structure is simple, installation is convenient, portability is high, special tools and auxiliary equipment are not needed, and the cost is low. The key fixing device is suitable for key fixing under different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a structure and transmission mechanism suitable for key fixing. Background Technology

[0002] A key is a component in mechanical transmission, primarily used for circumferential fixing between shafts and parts on those shafts to transmit torque. Keys include various types such as flat keys and wedge keys. Wedge keys have their working surfaces on both the top and bottom surfaces. The top surface of the wedge key has a slope of 1:100 or similar proportions, as does the bottom surface of the hub keyway. When the wedge key is driven into the shaft and hub groove, a large preload is generated on its surface. During operation, torque is mainly transmitted through friction and it can withstand unidirectional axial forces.

[0003] However, under high torque and high vibration conditions, the wedge key may sometimes come out, and if it is not checked in time during use, it is very easy to cause accidents, which poses a great hidden danger. Therefore, it is urgent to design a key fixing structure to meet the requirements of safety and stability. Utility Model Content

[0004] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a structure and transmission mechanism suitable for key fixing.

[0005] According to the present invention, a structure suitable for key fixing is provided, including a fixing plate, wherein the fixing plate is provided with a first through hole and a second through hole;

[0006] The key is assembled in the keyway formed between the transmission component and the shaft. The outer end face of the key is provided with a first internal thread hole, and the outer end face of the transmission component is provided with a second internal thread hole.

[0007] One end of the fixing plate is detachably fixed to the key via a first connector, and the other end of the fixing plate is detachably fixed to the transmission component via a second connector. The end of the first connector passes through the first through hole and is fitted into the first internal threaded hole, and the second connector passes through the second through hole and is fitted into the second internal threaded hole.

[0008] Preferably, both the first connector and the second connector are screws.

[0009] Preferably, the first connector and the second connector are used in conjunction with spring washers.

[0010] Preferably, the outer end face of the key and the outer end face of the transmission member are not coplanar.

[0011] Preferably, the fixing plate is circular, square, or elliptical.

[0012] Preferably, both the first internal threaded hole and the second internal threaded hole are machined by tapping.

[0013] Preferably, the inner diameter of the first internal threaded hole is the same as the inner diameter of the second internal threaded hole.

[0014] Preferably, the inner diameter of the first internal threaded hole is smaller than the inner diameter of the second internal threaded hole.

[0015] Preferably, both the first and second connectors are made of stainless steel, and the fixing plate is a steel plate.

[0016] According to the present invention, a transmission mechanism includes a shaft and a transmission component mounted on the shaft. A keyway is provided between the transmission component and the shaft, and the key is assembled in the keyway, adopting the structure suitable for key fixing.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model connects the end face of the key and the end face of the transmission component through a designed fixing plate. The fixing plate can effectively fix and limit the key, effectively preventing the risk caused by easy outward movement and avoiding safety hazards caused by key movement. It has a simple structure, is easy to install, and is highly portable. It does not require special tools or auxiliary equipment and is suitable for fixing keys under different working conditions. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a side view of the structure of this utility model, in which the fixing plate is not assembled;

[0021] Figure 2 This is a structural diagram of the fixed plate;

[0022] Figure 3 This is a side view of the structure of this utility model, in which the fixing plate has been assembled.

[0023] The diagram shows:

[0024] Key 1

[0025] First internal threaded hole 11

[0026] Transmission component 2

[0027] Second internal threaded hole 21

[0028] Axis 3

[0029] Fixed plate 4

[0030] First through hole 41

[0031] Second through hole 42

[0032] First connector 43

[0033] Second connector 44 Detailed Implementation

[0034] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0035] Example 1:

[0036] To address the problem of wedge keys easily dislodging under high torque and high vibration conditions, this invention provides a structure suitable for key fixing, such as... Figure 1 , Figure 2 , Figure 3 As shown, the device includes a fixing plate 4 with a first through hole 41 and a second through hole 42. A key 1 is assembled in a keyway formed between a transmission component 2 and a shaft 3. A first internal threaded hole 11 is provided on the outer end face of the key 1, and a second internal threaded hole 21 is provided on the outer end face of the transmission component 2. One end of the fixing plate 4 is detachably fixed to the key 1 via a first connecting member 43, and the other end of the fixing plate 4 is detachably fixed to the transmission component 2 via a second connecting member 44. By connecting the two ends of the fixing plate 4 to the key 1 and the transmission component 2 respectively, the key 1 is constrained by the fixing plate 4 when it moves outward, effectively preventing the risk caused by the key 1 moving outward. The structure is simple, easy to operate, and easy to implement.

[0037] In actual operation, the end of the first connector 43 passes through the first through hole 41 and is assembled into the first internal threaded hole 11, and the second connector 44 passes through the second through hole 42 and is assembled into the second internal threaded hole 21. Both the first connector 43 and the second connector 44 are preferably made of screws, allowing for quick assembly using tools such as wrenches, making the operation simple.

[0038] Specifically, the fixing plate 4 can be in various shapes such as round, rectangular, square, and oval. To increase the anti-slip effect, the fixing plate 4 is preferably made of a rigid material, such as a high-strength steel plate.

[0039] Furthermore, to improve the vibration resistance, spring washers can be used when assembling screws to prevent the fixing plate 4 from failing due to loosening of the screws during use.

[0040] To increase the versatility of this utility model, the first internal threaded hole 11 and the second internal threaded hole 21 are both machined by tapping. Therefore, this utility model can be used in various scenarios where wedge keys are used to drill holes on the end face of the transmission component 2 and the end face of the key 1 with simple tools such as electric drills and taps. It can be operated anytime and anywhere, which greatly reduces the implementation difficulty of this utility model.

[0041] In practical applications, the inner diameter of the first internal threaded hole 11 can be designed to be the same as the inner diameter of the second internal threaded hole 21, requiring only screws of the same specification, which is simple and convenient. However, in some special cases, the inner diameter of the second internal threaded hole 21 can be machined to be larger than the inner diameter of the first internal threaded hole 11, which can achieve a greater fixing force on the fixing plate 4 and increase the stability of the fixing plate 4.

[0042] To enhance corrosion resistance and adaptability to humid environments, both the first connector 43 and the second connector 44 are preferably made of stainless steel.

[0043] It should be noted that transmission component 2 is a transmission structure assembled on shaft 3, such as gears, pulleys, couplings, transmission sleeves, etc.

[0044] This utility model also provides a transmission mechanism with a structure suitable for key fixing, including a shaft 3 and a transmission component 2 mounted on the shaft 3. A keyway is provided between the transmission component 2 and the shaft 3, and the key 1 is assembled in the keyway. The anti-dislodgement effect of the key 1 is achieved by fixing one end of the fixing plate 4 to the end face of the transmission component 2 and the other end of the fixing plate 4 to the end of the key 1.

[0045] This invention is particularly effective for the installation of wedge keys under high torque and high vibration conditions. Practical experience has proven that after the wedge key and gear are connected and fixed by the plate, the problem of the wedge key vibrating and slipping outwards can be effectively prevented, and it can be widely applied. Furthermore, the fixing plate 4 in this invention is simple to manufacture, inexpensive, and easy to implement.

[0046] Example 2:

[0047] The difference between this embodiment and Embodiment 1 is that the outer end face of key 1 and the outer end face of transmission component 2 are allowed to be non-coplanar. In other words, the fixing plate 4 can be made into a stepped structure to accommodate scenarios where the outer planes of key 1 and transmission component 2 are not coplanar during assembly, greatly improving versatility.

[0048] Taking the transmission component 2 as a gear as an example, the working principle of this utility model is as follows:

[0049] Based on the size of key 1, select a tap of appropriate size and tap the outer end face of key 1 to form a first internal thread hole 11. On the end face of gear, select a position close to key 1 and tap the second internal thread hole 21 to form a second internal thread hole 21. The distance between the first internal thread hole 11 and the second internal thread hole 21 is preferably 0.5 to 5 cm.

[0050] Next, one end of the fixing plate 4 is fixed to the key 1 with a screw, and the other end of the fixing plate 4 is fixed to the gear with another screw. By connecting the two ends of the fixing plate 4 to the key 1 and the transmission component 2 respectively, the key 1 is restricted by the fixing plate 4 when it moves outward, which effectively prevents the risk caused by the key 1 moving outward.

[0051] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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, they should not be construed as limitations on this application.

[0052] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A structure suitable for key fixing, characterized in that, Includes a fixing plate (4), on which a first through hole (41) and a second through hole (42) are provided; The key (1) is assembled in the keyway formed between the transmission component (2) and the shaft (3). The outer end face of the key (1) is provided with a first internal thread hole (11), and the outer end face of the transmission component (2) is provided with a second internal thread hole (21). One end of the fixing plate (4) is detachably fixed to the key (1) via the first connector (43), and the other end of the fixing plate (4) is detachably fixed to the transmission member (2) via the second connector (44). The end of the first connector (43) passes through the first through hole (41) and is fitted into the first internal thread hole (11), and the second connector (44) passes through the second through hole (42) and is fitted into the second internal thread hole (21).

2. The structure suitable for key fixing according to claim 1, characterized in that, Both the first connector (43) and the second connector (44) are made of screws.

3. The structure suitable for key fixing according to claim 1, characterized in that, The first connector (43) and the second connector (44) are used in conjunction with spring washers.

4. The structure suitable for key fixing according to claim 1, characterized in that, The outer end face of the key (1) and the outer end face of the transmission member (2) are not allowed to be coplanar.

5. The structure suitable for key fixing according to claim 1, characterized in that, The fixing plate (4) is circular, square or elliptical.

6. The structure suitable for key fixing according to claim 1, characterized in that, The first internal threaded hole (11) and the second internal threaded hole (21) are both machined by tapping.

7. The structure suitable for key fixing according to claim 1, characterized in that, The inner diameter of the first internal threaded hole (11) is the same as the inner diameter of the second internal threaded hole (21).

8. The structure suitable for key fixing according to claim 1, characterized in that, The inner diameter of the first internal threaded hole (11) is smaller than the inner diameter of the second internal threaded hole (21).

9. The structure suitable for key fixing according to claim 1, characterized in that, The first connector (43) and the second connector (44) are both made of stainless steel, and the fixing plate (4) is a steel plate.

10. A transmission mechanism comprising a shaft (3) and a transmission component (2) mounted on the shaft (3), wherein a keyway is provided between the transmission component (2) and the shaft (3), and a key (1) is assembled in the keyway, characterized in that, The structure suitable for key fixation is adopted according to any one of claims 1 to 9.

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