Transmission mechanism

Abstract

The utility model discloses a transmission mechanism, and belongs to the technical field of mechanical parts. The transmission mechanism provided by the utility model comprises a transmission worm, a worm shaft and an elastic element, wherein the transmission worm and the worm shaft are coaxially arranged; a first blind hole is formed in one end of the transmission worm in the axial direction of the transmission worm. A second blind hole is formed in one end of the worm shaft in the axial direction of the worm shaft. The end, provided with the second blind hole, of the worm shaft extends into the first blind hole, part of the elastic element is located in the second blind hole, and part of the elastic element is located between the first blind hole and the second blind hole. According to the transmission mechanism provided by the utility model, the elastic element is additionally arranged between the transmission worm and the worm shaft, so that the resistance of the transmission worm during rotation can be increased, and the generation of abnormal sound is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical parts technical field, concretely relates to a transmission mechanism of worm and gear cooperation. BACKGROUND

[0002] The transmission mechanism composed of worm and gear is widely applied in various mechanical structures, and this kind of transmission mechanism can convert the rotary motion of motor into linear motion. However, this kind of transmission mechanism will appear abnormal sound in long-term use due to friction, wear and tear and other reasons. The methods commonly used to solve abnormal sound at present mainly include optimizing material, increasing lubrication, cleaning, checking and replacing worn parts. But most of the methods need to disassemble the equipment, which is inconvenient to operate, and may affect the original appearance of the product after disassembly. How to overcome the problem of abnormal sound through structural optimization and further reduce the probability of subsequent disassembly and maintenance has become a technical problem to be solved at present. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problem that a transmission mechanism is provided which is not prone to abnormal sound.

[0004] In order to solve the above technical problem, the utility model adopts the technical scheme that a transmission mechanism comprises a transmission worm and a worm shaft arranged coaxially, and an elastic element, one end of the transmission worm is provided with a first blind hole in the axial direction thereof, one end of the worm shaft is provided with a second blind hole in the axial direction thereof, one end of the worm shaft provided with the second blind hole extends into the first blind hole, part of the elastic element is located in the second blind hole, and part of the elastic element is located between the first blind hole and the second blind hole.

[0005] Further, the elastic element elastically exerts force on the transmission worm in the direction perpendicular to the axial direction of the transmission worm.

[0006] Further, the elastic element comprises a fixed arm and an elastic arm connected with each other, the fixed arm is arranged in the second blind hole, and the elastic arm extends out of the second blind hole.

[0007] Further, the elastic element comprises a first elastic arm, a fixed arm and a second elastic arm connected in sequence, the fixed arm is arranged in the second blind hole, and the first elastic arm and the second elastic arm extend out of the second blind hole.

[0008] Further, the worm shaft comprises a shaft body and a base, and a clearance groove is arranged on the side wall of the shaft body.

[0009] Further, it further comprises a worm coaxially arranged with the transmission worm, and the worm is arranged on the periphery of the transmission worm.

[0010] Further, it further comprises a driving worm, and the driving worm is engaged with the worm.

[0011] Further, a push rod mechanism is further included, the push rod mechanism includes a push rod, and a gear part sleeved with the push rod, the gear part is engaged with the transmission worm.

[0012] Further, the material of the elastic element is metal.

[0013] Further, the cross section of the elastic element is rectangular, circular or elliptical.

[0014] The beneficial effect of the utility model lies in: the transmission mechanism provided by the utility model sets elastic elements on the shaft of the second level worm, so that the resistance between the second level worm and its shaft is increased in the rotating process, and the elastic elements also provide elastic force, so that the whole transmission mechanism is not prone to abnormal sound in the use process, and the problem that the transmission mechanism is prone to abnormal sound in the long-term use process is overcome. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a part structure schematic view of the transmission mechanism of the embodiment of the utility model;

[0016] Figure 2 It is a structure schematic view of the worm shaft and an elastic element of the embodiment of the utility model;

[0017] Figure 3 It is Figure 2 the top view;

[0018] Figure 4 It is a structure schematic view of the worm shaft and another elastic element of the embodiment of the utility model;

[0019] Figure 5 It is another part structure schematic view of the transmission mechanism of the embodiment of the utility model;

[0020] REFERENCE SIGNS:

[0021] 1, transmission worm; 11, first blind hole;

[0022] 2, worm shaft; 21, second blind hole; 22, shaft body; 23, base; 24, let go slot;

[0023] 3, elastic element; 31, fixed arm; 32, elastic arm;

[0024] 4, worm wheel;

[0025] 5, push rod mechanism; 51, push rod; 52, gear part;

[0026] 6, drive worm. DETAILED DESCRIPTION

[0027] The technical content of the utility model, the purpose and the effect realized will be described in detail below by combining with the embodiments and the drawings.

[0028] Please refer to Figures 1-5 A transmission mechanism, comprising a transmission worm and a worm shaft arranged coaxially, and an elastic element, one end of the transmission worm is provided with a first blind hole in the axial direction thereof, one end of the worm shaft is provided with a second blind hole in the axial direction thereof, the end of the worm shaft provided with the second blind hole is inserted into the first blind hole to realize the connection of the transmission worm and the worm shaft, part of the elastic element is located in the second blind hole, part of the elastic element is located between the first blind hole and the second blind hole, and in particular, part of the elastic element is located between the inner wall of the first blind hole and the outer wall of the worm shaft.

[0029] The elastic element elastically exerts force on the transmission worm in a direction perpendicular to the axial direction of the transmission worm.

[0030] From the above description, it can be seen that the utility model has the beneficial effects that when the transmission worm and the worm shaft are connected, the part of the elastic element located between the first blind hole and the second blind hole is in a compressed state. The elastic element elastically exerts force on the transmission worm on one hand, and can increase the resistance when the transmission worm rotates, thereby reducing the problem of abnormal noise generated by the transmission mechanism during use.

[0031] The blind hole mentioned in the present application is a non-through inner hole.

[0032] In one or more embodiments, the elastic element comprises a fixed arm and an elastic arm connected to each other, and the number of elastic arms is at least one, which can be two or more. The fixed arm is arranged in the second blind hole, and the elastic arm extends out of the second blind hole, and one end of the elastic arm not connected to the fixed arm is arranged towards the worm shaft.

[0033] When the number of elastic arms is two, the elastic element comprises a first elastic arm, a fixed arm and a second elastic arm connected in sequence, the fixed arm is arranged in the second blind hole, the first elastic arm and the second elastic arm extend out of the second blind hole, and one end of the first elastic arm and the second elastic arm not connected to the fixed arm is arranged towards the worm shaft.

[0034] In one or more embodiments, the fixed arm is U-shaped, and the elastic arm is C-shaped.

[0035] From the above description, it can be seen that the above-mentioned elastic element structure can provide elastic force and resistance at the same time, ensure the smooth rotation, avoid the generation of abnormal noise, and will not affect the overall structure and increase the volume of the whole device.

[0036] In one or more embodiments, the worm shaft comprises a shaft body and a base; a side wall of the shaft body is provided with a clearance groove for providing clearance space for the part of the elastic element between the first blind hole and the second blind hole, so as to avoid the influence of the elastic element on the rotation of the transmission worm; the base is used to realize the connection with other structures, and the base can also be integrally formed on other structures to increase the stability of the connection.

[0037] In one or more embodiments, a worm gear coaxial with the transmission worm is further included, and the worm gear is arranged at the periphery of the transmission worm, and the transmission worm and the worm gear are preferably integrally formed.

[0038] In one or more embodiments, a drive worm is further included; the drive worm is engaged with the worm gear, and the drive worm is in transmission connection with the motor. The axial direction of the drive worm is non-parallel to the axial direction of the transmission worm, and the two have an included angle, such as 90°. The drive worm is driven to rotate by the motor, the drive worm is engaged with the worm gear, and the transmission worm can be further driven to rotate by the worm gear.

[0039] In one or more embodiments, a push rod mechanism is further included, the push rod mechanism comprises a push rod and a gear part sleeved with the push rod, and the gear part is engaged with the transmission worm. The axial direction of the push rod is non-horizontal to the axial direction of the transmission worm, and the transmission worm can further drive the push rod to move linearly through the gear part. In the use process, it is not easy to produce abnormal sound when the push rod of the push rod mechanism is usually extended, that is, when the door handle is opened, but abnormal sound is easy to produce when the push rod is retracted, that is, when the door handle is closed (retracted). By using the transmission mechanism of the utility model, the abnormal sound problem caused by uneven resistance of the transmission mechanism can be overcome, and the transmission mechanism of the utility model can mainly avoid the abnormal sound problem caused by the retraction of the push rod.

[0040] In one or more embodiments, the material of the elastic element is metal, such as manganese steel.

[0041] As described above, the metal elastic element has better wear resistance and rigidity, and also has certain toughness.

[0042] In one or more embodiments, the cross section of the elastic element is rectangular, circular or elliptical.

[0043] As described above, the elastic element can be a structure formed by a metal sheet, or a structure formed by a metal wire or a metal rod, and the specific selection can be made according to the size and other parameters of the transmission worm and the worm shaft.

[0044] Please refer to Figure 2 , Figure 3 and Figure 5 , embodiment one is:

[0045] A transmission mechanism comprises a transmission worm 1, a worm shaft 2, a worm gear 4, a drive worm 6 and an elastic element 3;

[0046] The transmission worm 1, the worm shaft 2 and the worm wheel 4 are coaxially arranged, the worm wheel 4 is arranged at the periphery of the transmission worm 1, and the transmission worm 1 is integrally formed with the worm wheel 4; the driving worm 6 is engaged with the worm wheel 4, and the driving worm 6 is in transmission connection with the motor;

[0047] One end of the transmission worm 1 is provided with a first blind hole 11 in the axial direction; one end of the worm shaft 2 is provided with a second blind hole 21 in the axial direction; the end of the worm shaft 2 provided with the second blind hole 21 is inserted into the first blind hole 11 to realize the connection of the transmission worm 1 and the worm shaft 2; the worm shaft 2 comprises a shaft body 22 and a base 23; a displacement slot 24 is arranged on the side wall of the shaft body 22;

[0048] The elastic element 3 comprises a fixed arm 31 and an elastic arm 32 which are connected with each other, the fixed arm 31 is arranged in the second blind hole 21, the elastic arm 32 is arranged in the second blind hole 21, and one end of the elastic arm 32 which is not connected with the fixed arm 31 is arranged towards the worm shaft 2; the elastic arm 32 is located between the inner wall of the first blind hole 11 and the inner wall of the displacement slot 24.

[0049] Please refer to Figure 4 and Figure 5 , embodiment two is:

[0050] The difference between embodiment two and embodiment one lies in that the structure of the elastic element 3 is different, the elastic element 3 in embodiment two comprises a first elastic arm, a fixed arm 31 and a second elastic arm which are connected in sequence; the fixed arm 31 is arranged in the second blind hole 21, the first elastic arm and the second elastic arm are arranged in the second blind hole 21, and one end of the first elastic arm and the second elastic arm which is not connected with the fixed arm 31 is arranged towards the worm shaft, the fixed arm 31 is U-shaped, and the first elastic arm and the second elastic arm are C-shaped; the elastic element 3 is axisymmetric; the cross section of the elastic element 3 is circular; and the material of the elastic element 3 is manganese steel.

[0051] Please refer to Figure 1 , Figure 4 and Figure 5 , embodiment three is:

[0052] On the basis of embodiment two, the push rod mechanism 5 is further included, the push rod mechanism 5 comprises a push rod 51 and a gear part 52 which is sleeved with the push rod 51, and the gear part 52 is engaged with the transmission worm 1.

[0053] The teeth of the transmission worm, the worm wheel and the driving worm in the utility model are all helical teeth.

[0054] The transmission mechanism of the utility model can be used for the automobile door handle actuator, such as the automobile door handle disclosed in the Chinese utility model patent with the application number 202221779340.5.

[0055] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in the related technical field based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A transmission mechanism, characterized by, The transmission worm and the worm shaft are coaxially arranged, and the elastic element is arranged; one end of the transmission worm is provided with a first blind hole in the axial direction; one end of the worm shaft is provided with a second blind hole in the axial direction; the end of the worm shaft provided with the second blind hole extends into the first blind hole, and part of the elastic element is arranged in the second blind hole and part of the elastic element is arranged between the first blind hole and the second blind hole.

2. The transmission mechanism according to claim 1, characterized in that The elastic element elastically applies force to the transmission worm in a direction perpendicular to the axial direction of the transmission worm.

3. The transmission mechanism of claim 1, wherein The elastic element comprises a fixed arm and an elastic arm which are connected to each other; the fixed arm is arranged in the second blind hole, and the elastic arm extends out of the second blind hole.

4. The transmission mechanism of claim 1, wherein The elastic element comprises a first elastic arm, a fixed arm and a second elastic arm which are connected to each other in sequence; the fixed arm is arranged in the second blind hole, and the first elastic arm and the second elastic arm extend out of the second blind hole.

5. The transmission mechanism of claim 1, wherein The worm shaft comprises a shaft body and a base; a clearance groove is arranged on the side wall of the shaft body.

6. The transmission of claim 1, wherein, A worm wheel coaxially arranged with the transmission worm is further arranged; the worm wheel is arranged on the periphery of the transmission worm.

7. The transmission mechanism of claim 6, wherein A driving worm is further arranged; the driving worm is engaged with the worm wheel.

8. The transmission mechanism of claim 6, wherein A push rod mechanism is further arranged; the push rod mechanism comprises a push rod and a gear part sleeved with the push rod; the gear part is engaged with the transmission worm.

9. The transmission of claim 1, wherein, The material of the elastic element is metal.

10. The transmission of claim 1, wherein, The cross section of the elastic element is rectangular, circular or elliptical.

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