Coaxial transmission structure

Abstract

The utility model discloses a coaxial transmission structure which comprises a shell and a coaxial transmission mechanism, and a cavity is formed in the shell. The coaxial transmission mechanism comprises a motor and a gear box, the motor is provided with a rotating shaft, the gear box is provided with an output shaft, and the axis of the rotating shaft and the axis of the output shaft are located on the same straight line; wherein the motor and the gear box are assembled in the cavity in the axis direction of the rotating shaft, the coaxial transmission mechanism is installed in the shell, when the coaxial transmission structure needs a load, the load directly acts on the shell and is transmitted through the shell, and especially when the coaxial transmission structure is applied to a product with a lifting function, the load is directly acted on the shell and is transmitted through the shell. And more loads in the lifting process are conducted through the shell, so that the loads borne by the gears and the rotating shaft in the gear box are effectively reduced, the transmission noise between the gears and the possibility of damage are reduced, and finally the purpose of prolonging the service life of the gear box and the service life of the motor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission structures, in particular to a coaxial transmission structure. Background Art

[0002] When the existing gearboxes and motors on the market are subjected to the push-pull torque of the load, the gearboxes and motors are prone to deformation, which causes the noise to increase under load. After long-term operation, the transmission system is easily damaged and fails under the direct action of the push-pull force of the load. Utility Model Content

[0003] In order to overcome at least one of the defects described in the above-mentioned prior art, the utility model provides a coaxial transmission structure, which can solve the problem that when the gearbox and the motor are under load, the gears in the gearbox are subjected to more push-pull torque, thereby causing large transmission noise between the gears and the components in the gearbox are easily damaged and fail.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A coaxial transmission structure, comprising:

[0006] A housing having a cavity therein;

[0007] A coaxial transmission mechanism, the coaxial transmission mechanism comprising a motor and a gear box in transmission connection with the motor, the motor having a rotating shaft, the gear box having an output shaft, the axis of the rotating shaft and the axis of the output shaft being located on the same straight line;

[0008] Wherein, the motor and the gear box are assembled in the cavity in the axial direction of the rotating shaft.

[0009] By adopting the above scheme, the coaxial transmission mechanism is installed inside the shell. When the coaxial transmission structure needs a load, the load directly acts on the shell, and the load is transferred through the shell. Especially when the coaxial transmission structure is applied to products with lifting functions, more loads during the lifting process are transmitted through the shell, which effectively reduces the load borne by the gears and rotating shafts in the gear box, thereby reducing the transmission noise between the gears and the possibility of damage, and ultimately achieving the purpose of increasing the service life of the gear box and the motor.

[0010] Furthermore, the shell includes an outer tube, a first flange and a second flange, and the first flange and the second flange are respectively arranged at two ends of the outer tube to jointly form a cavity for installing the coaxial transmission mechanism.

[0011] By adopting the above solution, an outer tube with openings at both ends is used, which greatly facilitates the installation of the motor and the gear box.

[0012] Furthermore, a buffer gasket is provided between the second flange and the motor.

[0013] By adopting the above solution, the length tolerance of the motor and the gearbox in the tube can be effectively adjusted to cause the assembly virtual position error, while providing vibration reduction, noise reduction and buffering effects to protect the components inside the cavity from instantaneous impact force.

[0014] Furthermore, the first flange and the second flange are fixedly connected to two ends of the outer tube through corresponding fasteners respectively.

[0015] By adopting the above solution, the connection between the outer pipe, the first flange and the second flange is ensured to be stable.

[0016] Furthermore, at least one end of the outer tube is provided with a positioning structure for fixing the first flange or the second flange.

[0017] By adopting the above solution, the installation and positioning of the first flange and / or the second flange are facilitated, and the setting of the assembly holes for installing the fasteners is also facilitated, thereby improving the installation production efficiency and the integrity of the shell.

[0018] Furthermore, the positioning structure includes a positioning groove and a positioning protrusion, the positioning groove and the corresponding positioning protrusion are clamped and fixed, one of the positioning groove and the positioning protrusion is arranged on the outer tube, and the other is arranged on the first flange or the second flange.

[0019] By adopting the above scheme, the positioning groove and the positioning protrusion are clamped and fixed, which facilitates the initial installation and positioning of the outer tube, the first flange and the second flange. The clamping and fixing structure is simple, which is conducive to improving production efficiency.

[0020] Furthermore, the inner wall of the shell is respectively fitted with the outer wall of the motor and the outer wall of the gear box.

[0021] By adopting the above solution, the compactness of the coaxial transmission structure can be ensured, which is beneficial to the installation and use of the coaxial transmission structure. More importantly, the inner wall of the housing is respectively fitted with the outer wall of the motor and the outer wall of the gear box, which can improve the heat dissipation efficiency.

[0022] Furthermore, the housing is made of metal material, and / or the outer shell of the motor is made of metal material, and / or the outer shell of the gear box is made of metal material.

[0023] By adopting the above solution, the heat dissipation effect is further improved.

[0024] Furthermore, a first flange is provided at one end of the shell, and a positioning block is installed on a side of the first flange away from the cavity, and the positioning block is used for installation and positioning of the shell.

[0025] By adopting the above scheme, when the coaxial transmission structure is installed in a partial cavity structure, the positioning blocks can be set according to the shapes of the cavities. When dealing with installation situations in different cavities, it is only necessary to replace the positioning blocks to achieve auxiliary installation by replacing the corresponding positioning blocks, thereby improving the versatility of the coaxial transmission structure.

[0026] Furthermore, the positioning block is made of flexible material.

[0027] By adopting the above solution, since the positioning block has a certain elastic deformation space, the installation of the coaxial transmission structure is convenient, and the vibration reduction and noise reduction functions are provided at the same time.

[0028] In summary, the coaxial transmission structure provided by the utility model has the following technical effects:

[0029] The coaxial transmission mechanism is installed inside the shell. When the coaxial transmission structure needs a load, the load directly acts on the shell and the load is transmitted through the shell. Especially when the coaxial transmission structure is used in products with lifting functions, more loads during the lifting process are transmitted through the shell, which effectively reduces the load borne by the gears and rotating shafts in the gear box, thereby reducing the transmission noise and the possibility of damage between the gears, and ultimately achieving the purpose of prolonging the service life of the gear box and the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0031] Figure 2 It is a side view of the utility model;

[0032] Figure 3 For this utility model Figure 2 AA cross-sectional structural diagram;

[0033] Figure 4 It is a schematic diagram of a partial explosion structure of the utility model.

[0034] Among them, the meanings of the figure marks are as follows: 11, outer tube; 12, first flange; 13, second flange; 21, motor; 211, rotating shaft; 22, gear box; 221, output shaft; 3, positioning block; 4, buffer gasket; 51, positioning groove; 52, positioning protrusion; 6, fastener. DETAILED DESCRIPTION

[0035] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0039] See also Figure 1 and Figure 2 As shown, the utility model discloses a coaxial transmission structure: including a housing and a coaxial transmission mechanism, and a cavity is provided in the housing. The coaxial transmission mechanism includes a motor 21 and a gear box 22, the motor 21 has a rotating shaft 211, and the gear box 22 has an output shaft 221, and the axis of the rotating shaft 211 and the axis of the output shaft 221 are located on the same straight line. Among them, the motor 21 and the gear box 22 are assembled in the cavity in the axial direction of the rotating shaft 211. When the coaxial transmission structure is installed in a product of a specific application, the longitudinal load will be transmitted to the main force-bearing structure in the specific installation product through the housing, which effectively reduces the load borne by the gears and the rotating shaft in the gear box 22, thereby reducing the transmission noise and the possibility of damage between the gears, and finally achieving the purpose of increasing the service life of the gear box 22 and the motor 21.

[0040] Among the above-mentioned products in which the coaxial transmission structure is installed in specific applications, take the implementation method of the coaxial transmission structure applied to the legs of the lifting table as an example. The space inside the legs of the lifting table is limited, and the motor 21, the rotating shaft 211 and the output shaft 221 are coaxially designed, so that the coaxial transmission structure can be integrated into a cavity with limited space. The output shaft 221 is connected to the corresponding lifting screw to achieve the lifting effect. When the lifting screw generates a push-pull force during the rising and falling process, it will directly act on the shell, and then be transmitted to the table legs through the shell. The internal gear box 22 and the motor 21 are only responsible for providing radial torque during rotation, and do not bear the up and down push-pull force, which provides good protection for the gear box 22 and the motor 21, and effectively solves the problem of increased noise and easy damage.

[0041] Specifically, the housing includes an outer tube 11, a first flange 12, and a second flange 13. The outer tube 11 is a pipe with two ends open, which is convenient for installing the motor 21 and the gear box 22. After the motor 21 and the gear box 22 are installed, the first flange 12 and the second flange 13 are installed at both ends of the outer tube 11, respectively, to form a cavity for installing the gear box 22 and the motor 21. In order to ensure the stable connection between the outer tube 11, the first flange 12, and the second flange 13, the first flange 12 and the second flange 13 are fixedly connected to the outer tube 11 by corresponding fasteners 6. In this embodiment, the fastener 6 is a screw. In other embodiments, the specific structure of the fastener 6 is not limited here.

[0042] In some embodiments, reference Figure 1 and Figure 4 As shown, in order to facilitate the assembly of the housing and ensure the fixing effect of the first flange 12 and the second flange 13, the housing is provided with a positioning structure at at least one of the two ends where the first flange 12 and the second flange 13 are assembled. In this embodiment, both ends of the housing are provided with a fixing structure. When the first flange 12 and the second flange 13 are installed, the first flange 12 and the second flange 13 are initially positioned by the fixing structure. The initial positioning also facilitates the alignment of the assembly holes for installing the fasteners 6 provided on the outer tube 11, the first flange 12 and the second flange 13, thereby improving the installation production efficiency and the integrity of the housing.

[0043] Specifically, refer to Figure 1 and Figure 4As shown, the positioning structure includes a positioning groove 51 and a positioning protrusion 52, and the positioning groove 51 and the corresponding positioning protrusion 52 are clamped and fixed. One of the positioning groove 51 and the positioning protrusion 52 is provided on the outer tube 11, and the other is provided on the first flange 12 and the second flange 13. The positioning groove 51 and the positioning protrusion 52 are clamped and fixed, which facilitates the initial installation and positioning of the outer tube 11, the first flange 12 and the second flange 13. The clamping and fixing structure is simple and is conducive to improving production efficiency. In this embodiment, the positioning groove 51 is provided on the outer tube 11, and the first flange 12 and the second flange 13 are both provided with a positioning protrusion 52 corresponding to the positioning groove 51. The groove wall of the positioning groove 51 is in contact with the side wall of the positioning protrusion 52. When installing the outer tube 11, the first flange 12 and the second flange 13, it is only necessary to align the positioning groove 51 and the positioning protrusion 52 to complete the installation and fixing of the above three components. In addition, the designer may also provide corresponding sets of positioning grooves 51 and positioning protrusions 52 along the circumference of the outer tube 11 , the first flange 12 and the second flange 13 according to specific needs, so as to improve the anti-torsion effect of the positioning structure.

[0044] Reference Figure 1 As shown, in order to improve the vibration reduction and noise reduction effect of the coaxial transmission structure, a buffer gasket 4 is provided between the second flange 13 and the motor 21. The buffer gasket 4 can effectively adjust the length tolerance of the motor 21 and the gear box 22 in the tube, the assembly virtual position error caused, and provide vibration reduction, noise reduction and buffering effects to protect the components inside the cavity from instantaneous impact. It should be noted that the buffer gasket 4 is made of a flexible material with a certain load-bearing capacity to ensure the stability of the transmission connection between the motor 21 and the gear box 22.

[0045] In some embodiments, reference Figure 1 , Figure 2 and Figure 3 As shown, in order to ensure the heat dissipation effect of the coaxial transmission structure and to cope with the scenario where the gears in the gear box 22 are closely arranged and generate severe heat, the inner wall of the housing is respectively fitted with the outer wall of the motor 21 and the outer wall of the gear box 22 to improve the heat dissipation efficiency. At the same time, the housing and the coaxial transmission mechanism of the coaxial transmission structure are also more compact, which is conducive to the installation and use of the coaxial transmission structure in a small space.

[0046] In order to further improve the heat dissipation effect of the coaxial transmission structure, the housing is made of metal material, and / or the outer shell of the motor 21 is made of metal material, and / or the outer shell of the gear box 22 is made of metal material. The specific metal material used can be selected according to the specific application scenario. When the gears arranged in the gear box 22 are relatively compact or the application scenario is relatively closed, the housing, the outer shell of the motor 21, and the outer shell of the gear box 22 can all be made of metal materials to improve the heat dissipation effect.

[0047] In some embodiments, reference Figure 1 and Figure 3 As shown, a first flange 12 is provided at one end of the shell, and a positioning block 3 is installed on the side of the first flange 12 away from the cavity, and the positioning block 3 is used for installation and positioning of the shell. Since the coaxial transmission structure is mostly used in cavities with limited installation space, when the coaxial transmission structure is installed in a partial cavity structure, the positioning block 3 can be set according to the shape of the cavity with different shapes. When dealing with installation situations in different cavities, only the positioning block 3 needs to be replaced to achieve replacement of the corresponding positioning block 3 to assist installation, thereby improving the versatility of the coaxial transmission structure. It is best to use a flexible material for the positioning block 3, because the positioning block 3 made of a flexible material has a certain elastic deformation ability, which is convenient for the installation of the coaxial transmission structure, while providing vibration reduction and noise reduction functions.

[0048] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A coaxial transmission structure, characterized in that: include: A housing having a cavity therein; A coaxial transmission mechanism, the coaxial transmission mechanism comprising a motor and a gear box in transmission connection with the motor, the motor having a rotating shaft, the gear box having an output shaft, the axis of the rotating shaft and the axis of the output shaft being located on the same straight line; Wherein, the motor and the gear box are assembled in the cavity in the axial direction of the rotating shaft.

2. A coaxial transmission structure according to claim 1, characterized in that: The shell includes an outer tube, a first flange and a second flange. The first flange and the second flange are respectively arranged at two ends of the outer tube to jointly form a cavity for installing a coaxial transmission mechanism.

3. A coaxial transmission structure according to claim 2, characterized in that: A buffer gasket is provided between the second flange and the motor.

4. A coaxial transmission structure according to claim 2, characterized in that: The first flange and the second flange are fixedly connected to two ends of the outer tube through corresponding fasteners respectively.

5. A coaxial transmission structure according to claim 2, characterized in that: At least one end of the outer tube is provided with a positioning structure for fixing the first flange or the second flange.

6. A coaxial transmission structure according to claim 5, characterized in that: The positioning structure includes a positioning groove and a positioning protrusion, and the positioning groove and the corresponding positioning protrusion are clamped and fixed. One of the positioning groove and the positioning protrusion is arranged on the outer tube, and the other is arranged on the first flange or the second flange.

7. The coaxial transmission structure according to claim 1, characterized in that: The inner wall of the shell is respectively fitted with the outer wall of the motor and the outer wall of the gear box.

8. A coaxial transmission structure according to any one of claims 1 to 7, characterized in that: The housing is made of metal material, and / or the outer shell of the motor is made of metal material, and / or the outer shell of the gear box is made of metal material.

9. The coaxial transmission structure according to claim 1, characterized in that: A first flange is provided at one end of the shell, and a positioning block is installed on a side of the first flange away from the cavity, and the positioning block is used for installation and positioning of the shell.

10. A coaxial transmission structure according to claim 9, characterized in that: The positioning block is made of flexible material.

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