Plastic-coated coupling and driving mechanism with same

Abstract

The utility model discloses a plastic-coated coupling and a driving mechanism with the same, the plastic-coated coupling comprises a coupling main body, two ends of the coupling main body are provided with connecting grooves connected with transmission parts, elastic layers are arranged in the connecting grooves in a plastic-coated mode, and the coupling main body is made of hard materials.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a plastic-coated coupling and a driving mechanism having the same. Background Art

[0002] A coupling is a mechanical component used to firmly connect the driving shaft and the driven shaft in different mechanisms so that they rotate together and transmit motion and torque. Sometimes it is also used to connect the shaft with other parts (such as gears, pulleys, etc.). It is usually composed of two halves, which are connected by keys or tight fits, fastened to the two ends of the shaft, and then connected in some way.

[0003] In the reducer transmission, couplings are used to realize series or parallel power transmission between two or more parts to meet the deceleration or acceleration of the reducer. However, in general, coupling transmission is prone to cause adverse factors such as reduced efficiency, high noise, and unstable movement during operation due to differences in matching position and coaxiality. Especially in the reducer (speed increase function), due to the different axes or the matching deviation between the coupling and the connecting parts at both ends, the power loss is large or jamming occurs, making it impossible to drive the operation. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a plastic-coated coupling and a driving mechanism having the same.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A plastic-coated coupling comprises a coupling body, wherein both ends of the coupling body are formed with connection grooves for connecting transmission components, and an elastic layer is plastic-coated in the connection groove, and the coupling body is made of hard material.

[0007] Preferably, the connection groove is provided with reinforcing teeth. Through the above improvements, the reinforcing teeth can increase the bearing strength and contact area of ​​the part combined with the parts, so that the coupling can withstand greater torque.

[0008] Preferably, the top surface of the reinforcing teeth is provided with a thickened adhesion layer, and the elastic layer is plastic-coated on the thickened adhesion layer. Through the above improvement, a thickened adhesion layer with a thickness of 0.5-1 mm is provided on the top surface of the reinforcing teeth to increase the plastic coating strength and prevent the elastic layer from falling off or being damaged.

[0009] Preferably, the surface of the connection groove is coated with adhesive, and the elastic layer is plastic-coated on the adhesive. Through the above improvement, adhesive is coated on the surface of the connection groove before the coupling body is plastic-coated to ensure that the plastic-coated elastic layer and the coupling body have strong adhesion when the coupling body transmits torque, thereby preventing the elastic layer from detaching.

[0010] Preferably, a connection port connected to the connection groove is formed in the coupling body, so that the elastic layer in the connection groove is integrally formed. Through the above improvement, since the connection port connected to the connection groove is formed in the coupling body, the elastic layers in the two connection grooves are combined together during the overmolding process, thereby further improving the reliability of the adhesion between the elastic layer and the coupling body.

[0011] Preferably, the coupling body is made of metal, hard plastic or hard rubber. Through the above improvements, the coupling body is made of strong materials, thereby ensuring the structural strength of the coupling body and ensuring that the coupling body will not deform during rotation to meet the performance requirements of transmitting torque.

[0012] Preferably, the elastic layer is made of soft rubber, soft plastic or strong sponge. Through the above improvements, the elastic layer is formed by plastic coating with some elastic materials with deformation ability, thereby ensuring the torque and reducing the noise.

[0013] A driving mechanism comprises a driving motor, a worm gear transmission-connected to the driving motor, and a plastic-coated coupling connecting the driving motor and the worm gear, wherein the driving motor and the worm gear are respectively inserted into a connecting groove of the plastic-coated coupling from both ends.

[0014] Preferably, the output end of the driving motor and the input end of the worm are sleeved with a special-shaped connecting piece matching the contour of the connecting groove. Through the above improvements, the torque can be better transmitted.

[0015] Preferably, a speed sensor is injection molded on the outside of the plastic-coated coupling, and a speed sensor is arranged at intervals on one side of the plastic-coated coupling. Through the above improvements, the speed sensor can detect the rotation speed of the coupling, thereby accurately controlling the rotation speed.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] By plastic coating the connection groove of the coupling body with an elastic layer, and the coupling body adopts a hard material and the elastic layer adopts an elastic material, not only the torque transmission requirement can be achieved, but also the noise can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the coupling of the utility model;

[0019] Figure 2 It is an exploded view of the coupling of the utility model;

[0020] Figure 3 It is a cross-sectional view of the coupling of the utility model;

[0021] Figure 4 It is a schematic diagram of the overall structure of the driving mechanism of the utility model;

[0022] Figure 5 It is a cross-sectional view of the driving mechanism of the utility model;

[0023] In the figure: 1, coupling body; 2, connecting groove; 3, elastic layer; 4, connecting port; 5, reinforcing teeth; 6, thickened attachment layer; 7, plastic-coated coupling; 101, driving motor; 102, worm; 103, special-shaped connecting piece; 104, speed sensor; 105, speed sensor; DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0026] Embodiment 1

[0027] like Figure 1-3 As shown, a plastic-coated coupling comprises a coupling body 1, two ends of the coupling body 1 are formed with connecting grooves 2 for connecting the transmission parts, and an elastic layer 3 is plastic-coated in the connecting groove 2, and the coupling body 1 is made of hard material.

[0028] By coating the connection groove 2 of the coupling body 1 with an elastic layer 3, and the coupling body 1 is made of hard material and the elastic layer 3 is made of elastic material, not only can the torque transmission requirement be achieved, but also the noise can be reduced. For the reducer with reverse starting torque requirement, the reverse torque can be reduced by 50%-80%, and the noise is also reduced by at least 5dB-10dB compared with the reducer without plastic coating. In addition, the coaxiality requirement of the connection grooves 2 at both ends of the coupling body 1 is not greater than 0.08mm during use. The elastic layer 3 can absorb part of the precision deviation, and its coaxiality requirement is not greater than 0.2mm, thereby reducing the precision requirement.

[0029] like Figure 1-3As shown, a further explanation of the connection groove 2 being released in this embodiment is that a reinforcing tooth 5 is arranged in the connection groove 2. When the connection groove 2 is connected to the transmission component, the reinforcing tooth 5 can increase the bearing strength and contact area of ​​the combined part with the component, so that the coupling can withstand greater torque.

[0030] In addition, the surface of the connecting groove 2 is coated with adhesive, and the elastic layer 3 is plastic-coated on the adhesive. Before the coupling body 1 is plastic-coated, the surface of the connecting groove 2 is coated with adhesive. After the adhesive is applied, the elastic layer 3 is bonded to the connecting groove 2 using a plastic-coating process to ensure that when the coupling body 1 transmits torque, there is a strong bonding force between the plastic-coated elastic layer 3 and the coupling body 1 to prevent the elastic layer 3 from detaching.

[0031] During the overmolding process, a connecting port 4 connected to the connecting groove 2 is formed in the coupling body 1, so that the elastic layer 3 in the connecting groove 2 is integrally formed. During the overmolding process, the elastic layers 3 in the two connecting grooves 2 are combined together, thereby further improving the reliability of the bonding between the elastic layer 3 and the coupling body 1.

[0032] The overmolding raw material flows from one end to the other end through the connecting port 4, realizing double-sided injection molding to fully overmold the coupling body 1, while also reducing the cost of the injection mold. In addition, during the overmolding process, multiple pieces can be produced in one mold (16 or 24 pieces can be produced in batches at one time), greatly improving production efficiency.

[0033] The connecting groove 2 may be a spline, a special-shaped groove, or a special-shaped hole.

[0034] like Figure 1-3 As shown, further explanation of the materials of the coupling body 1 and the elastic layer 3 in this embodiment, wherein the coupling body 1 is made of metal, hard plastic, or hard rubber. The coupling body 1 is manufactured using strong materials, thereby ensuring the structural strength of the coupling body 1 and ensuring that the coupling body 1 will not deform during rotation to meet the performance requirements of transmitting torque.

[0035] In this embodiment, PPA hard plastic is used for injection molding to form the coupling body 1 .

[0036] Furthermore, the elastic layer 3 is made of soft rubber, soft plastic or strong sponge, and is formed by overmolding with some elastic materials having deformation capability, thereby ensuring the torque and reducing the noise.

[0037] In this embodiment, the elastic layer 3 is formed by overmolding with soft nitrile rubber.

[0038] The plastic coating material is rubber or soft plastic with toughness and strength. At the same time, the raw materials used for plastic coating have certain high and low temperature resistance and a certain hardness. Different raw materials are selected according to the use environment and scene torque requirements.

[0039] Embodiment 2

[0040] like Figure 2 As shown, the difference between this embodiment and the first embodiment is that a thickened adhesion layer 6 is provided on the top surface of the reinforcing tooth 5, and the elastic layer 3 is plastic-coated on the thickened adhesion layer 6, and the thickness of the thickened adhesion layer 6 is 0.5-1mm. A thickened adhesion layer 6 with a thickness of 0.5-1mm is provided on the top surface of the reinforcing tooth 5 to increase the strength of the plastic coating and prevent the elastic layer 3 from falling off or being damaged, thereby greatly increasing the reliability of the connection between the elastic layer 3 and the reinforcing tooth 5.

[0041] Embodiment 3

[0042] like Figure 4-Figure 5 As shown, a driving mechanism includes a driving motor 101, a worm 102 drivingly connected to the driving motor 101, and a plastic-coated coupling 7 connecting the driving motor 101 and the worm 102, and the driving motor 101 and the worm 102 are respectively inserted into the connecting groove 2 of the plastic-coated coupling 7 from both ends.

[0043] The elastic layer 3 of the plastic-coated coupling 7 can absorb part of the precision deviation, thereby reducing the coaxiality of the special-shaped holes at both ends of the coupling. Generally, the coaxiality of the special-shaped holes at both ends of the coupling is required to be no more than 0.08mm. After absorption by the elastic layer 3, it can be reduced to no more than 0.2mm, and the coaxiality deviation can be achieved within 0.9mm.

[0044] Furthermore, the output end of the driving motor 101 and the input end of the worm 102 are sleeved with a special-shaped connecting piece 103 matching the contour of the connecting groove 2, so as to better transmit the torque.

[0045] In addition, a speed sensor 104 is injection molded on the outside of the plastic-coated coupling, and a speed sensor 105 is arranged below the plastic-coated coupling. The speed sensor 105 can detect the rotation speed of the coupling, thereby accurately controlling the rotation speed.

[0046] Specifically, when the driving motor 101 drives the worm 102 to operate, a speed sensor 104 (with pole pair and magnetism) is simultaneously injection-molded on the outside of the overmolded coupling 7. The distance between the overmolded coupling 7 and the speed sensor 105 must be ensured to be within 0.8±0.1mm (i.e., the radial deviation does not exceed 0.2mm; if they are too close, the two will expand due to heat and cause friction; if they are too far, the two will not sense each other and the deviation of the reducer's rotating output speed will be large), so the coupling accuracy requires a coaxiality of no more than 0.2mm.

[0047] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A plastic-coated coupling, characterized in that: The coupling body (1) comprises a coupling body, wherein two ends of the coupling body (1) are formed with connection grooves (2) for connecting transmission components, and an elastic layer (3) is provided in the connection groove (2) by plastic coating, and the coupling body (1) is made of hard material.

2. The plastic-coated coupling according to claim 1, characterized in that: Reinforcement teeth (5) are arranged in the connection groove (2).

3. The plastic-coated coupling according to claim 2, characterized in that: The top surface of the reinforcing tooth (5) is provided with a thickened adhesion layer (6), and the elastic layer (3) is plastic-coated and provided on the thickened adhesion layer (6).

4. The plastic-coated coupling according to claim 1, characterized in that: The surface of the connection groove (2) is coated with adhesive, and the elastic layer (3) is plastic-coated and arranged on the adhesive.

5. The plastic-coated coupling according to claim 1, characterized in that: A connection port (4) communicating with the connection groove (2) is formed in the coupling body (1), so that the elastic layer (3) in the connection groove (2) is integrally formed.

6. The plastic-coated coupling according to claim 1, characterized in that: The coupling body (1) is made of metal, hard plastic or hard rubber.

7. The plastic-coated coupling according to claim 1, characterized in that: The elastic layer (3) is made of soft rubber, soft plastic or strong sponge.

8. A driving mechanism, comprising the plastic-coated coupling according to any one of claims 1 to 7, characterized in that: The driving mechanism comprises a driving motor (101), a worm (102) drivingly connected to the driving motor (101), and a plastic-coated coupling (7) connecting the driving motor (101) and the worm (102), wherein the driving motor (101) and the worm (102) are respectively inserted into a connecting groove (2) of the plastic-coated coupling (7) from both ends.

9. A driving mechanism according to claim 8, characterized in that: A special-shaped connecting piece (103) matching the profile of the connecting groove (2) is sleeved on the output end of the driving motor (101) and the input end of the worm (102).

10. A driving mechanism according to claim 8, characterized in that: A speed sensor (104) is injection molded on the outside of the overmolded coupling (7), and a speed sensor (105) is spaced apart on one side of the overmolded coupling (7).

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