Gearbox assembly for motor assembly

Abstract

The utility model provides a gearbox assembly for a motor assembly. The gear box assembly comprises a gear box shell, a worm gear and a worm, the worm gear and the worm are installed in the gear box shell and meshed with each other, a buffer structure is arranged in the space, limiting the end for containing the worm, of the gear box shell, and the buffer structure extends into the space. According to the utility model, the manufacturing cost can be reduced, and the switching noise of the output shaft of the motor can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to worm gear reduction motors. Specifically, in a first aspect, the utility model relates to a gearbox assembly for the above motor. Background Art

[0002] A motor assembly is known, comprising a motor and a gearbox assembly, the two being assembled together, wherein the motor comprises a motor housing, the gearbox assembly comprises a gearbox housing, and the two housings are connected to each other. Other components of the motor are assembled in the motor housing. The motor and the gearbox assembly together constitute the motor assembly.

[0003] Figure 1 An example of a prior art gearbox assembly is shown, the gearbox assembly 10 is a part of a worm gear reduction motor assembly, which includes a gearbox housing 11, a worm wheel 12 and a worm 13, which are meshed with each other and installed in the gearbox housing 11. The worm 13 also serves as the output shaft of the motor.

[0004] In such Figure 1 In the arrangement shown, due to dimensional tolerances during manufacture, there is a certain gap between the end of the worm 12 and the housing wall of that part of the gearbox housing in which the end is accommodated. In order to compensate for this gap, a rubber cushion 14 is arranged in the gap against which the end of the worm 13 abuts.

[0005] There is another method in the prior art, that is, using different end plates as gaskets to compensate for the above gap. Figure 2 Another example of a gearbox assembly in the prior art is shown. The gearbox assembly 100 is also a part of a worm gear reduction motor assembly, which includes a gearbox housing 110, a worm wheel 120 and a worm 130. The worm wheel 120 and the worm 130 are meshed with each other and installed in the gearbox housing 110. In order to compensate for the gap caused by dimensional tolerance, a rubber block 140 and an end plate 150 are arranged in the gap, and the end of the worm 130 is against the end plate 150. Figure 2 A part of the motor M is also shown, and the worm 130 also serves as the output shaft of the motor M.

[0006] However, since a buffer pad or rubber block is required, the manufacturing cost of the motor assembly will increase. In addition, the problem with the second method is that as the worm rotates, the end plate wears, so that the gap becomes larger and larger, resulting in switching noise of the motor output shaft. Utility Model Content

[0007] The purpose of the present invention is to overcome at least one of the above-mentioned disadvantages in the prior art.

[0008] According to the utility model, a gearbox assembly for a motor assembly is provided, which includes a gearbox housing, and a worm wheel and a worm installed in the gearbox housing, the worm wheel and the worm being meshed with each other, wherein a buffer structure is provided in a space of the gearbox housing that defines an end portion for accommodating the worm, and the buffer structure extends into the space.

[0009] According to an embodiment, there is a gap between the end of the worm and an end wall of the gearbox housing in the axial direction of the worm, and the end plate is installed in the gap so that the buffer structure faces the end wall of the gearbox housing.

[0010] According to an embodiment, the buffer structure is integrally formed on the side wall of the gearbox housing.

[0011] The above-mentioned buffer structure can also be arranged on the end plate of the gearbox assembly used for the motor assembly. According to another embodiment, the buffer structure is integrally formed on one end surface of the end plate.

[0012] With this arrangement, the gearbox housing or the end plate and the buffer structure thereon can be integrally formed by injection molding, without providing a buffer pad or rubber block to compensate for the above gap, thereby reducing manufacturing costs. On the other hand, the buffer structure can elastically compensate for the above gap, avoiding the occurrence of switching noise of the motor output shaft.

[0013] According to an embodiment, the buffer structure is configured as two opposing cantilever structures. According to an embodiment, the cantilever structure is configured as an elastic fin.

[0014] In an embodiment where the damping structure is formed on the gearbox housing, the damping structure is bent in the direction of the end of the worm.

[0015] In an embodiment where the buffer structure is formed on the gearbox housing, the end of the worm abuts against the buffer structure. In another embodiment, a conventional end plate is arranged between the buffer structure and the end of the worm.

[0016] In the embodiment where the buffer structure is formed on the end plate, the buffer mechanism is bent outwardly from the end surface of the end plate.

[0017] Preferably, an elastic sheet is encapsulated in the buffer structure to increase the strength of the buffer structure. In an embodiment, the elastic sheet is made of metal, such as a steel sheet.

[0018] According to the utility model, a motor assembly is further provided, which includes a motor and the above-mentioned gear box housing.

[0019] According to an embodiment, the motor comprises a motor housing, which and a gearbox housing are connected to each other.

[0020] Other features and advantages of the present invention will be apparent from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The embodiments of the present invention will be explained in more detail in the accompanying drawings, in which:

[0022] Figure 1 is a schematic diagram of a portion of an example of a prior art gearbox assembly, wherein the gearbox housing is cut away to show components mounted therein;

[0023] Figure 2 is a schematic diagram of a portion of another example of a prior art gearbox assembly, wherein the gearbox housing is cut away to show components mounted therein;

[0024] Figure 3 It is a schematic diagram of a portion of a gearbox assembly according to an embodiment of the present invention, wherein the gearbox housing is cut away, and for the sake of clarity, the worm wheel and the worm are not shown;

[0025] Figure 4 It is seen along the direction of the motor output shaft Figure 3 A schematic diagram of a portion of a gearbox housing is shown;

[0026] Figure 5 When the worm gear and worm are installed Figure 3 A schematic diagram of a portion of a gearbox housing is shown;

[0027] Figure 6 is a schematic diagram of a portion of a gearbox assembly according to another embodiment of the present invention, wherein the gearbox housing is cut away;

[0028] Figure 7 is a schematic diagram of a portion of a gearbox assembly according to another embodiment of the present invention, wherein the gearbox housing is cut away; and

[0029] Figure 8 It is a schematic diagram of a part of a gearbox assembly according to another embodiment of the present invention, wherein the gearbox housing is cut away.

[0030] In the accompanying drawings, for the sake of clarity, the embodiments of the present utility model are shown in a simplified manner. The accompanying drawings are not necessarily shown to scale. Like reference numerals in the accompanying drawings represent like components. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, reference is made to a worm gear reduction motor and directional terms are used, which refer to the directions shown in the accompanying drawings, and the actual directions may be different.

[0032] Figure 3-Figure 5 A gearbox assembly 200 according to an embodiment of the present invention is shown. Figure 3 and Figure 4A portion of the gearbox housing 210 is shown from above and along the motor output shaft direction, respectively, and the worm wheel 220 and the worm 230 are meshed with each other and installed in the gearbox housing 210 (see Figure 5 ), wherein the gearbox housing 210 has a space for accommodating the end of the worm 230, the space being defined by the housing bottom wall 211, the first housing side wall 212a and the second housing side wall 212b, the two housing side walls being opposite to each other and each being integrally formed with a buffer structure, the buffer structure extending into the space. In addition, an end plate 250 is arranged between the buffer structure and the end of the worm 230.

[0033] As shown in the figure, the buffer structure is constructed as two opposite cantilever structures 213a and 213b, which only extend along the side wall of the shell, but not to the bottom wall 211 of the shell (see Figure 4 ), and bends in the direction of the end of the worm 230. In this example, the cantilever structure is configured as an elastic fin.

[0034] Figure 6 A gearbox assembly 300 according to another embodiment of the present invention is shown, which includes a gearbox housing 310, a worm wheel 320 and a worm 330, the worm wheel and the worm 330 meshing with each other and installed in the gearbox housing 310, and an end plate 350 is arranged between the buffer structure and the end of the worm 230. Figure 3-Figure 5 The difference between the embodiment of the present invention and the embodiment of the present invention is that the two cantilever structures of the buffer structure are respectively encapsulated with elastic sheets 360a and 360b to increase the strength of the buffer structure. In this embodiment, the elastic sheet is made of metal, such as a steel sheet.

[0035] Figure 7 A gearbox assembly 400 according to another embodiment of the present invention is shown, which includes a gearbox housing 410, a worm wheel 420 and a worm 430, the worm wheel and the worm 430 meshing with each other and installed in the gearbox housing 410, and an end plate 450 is arranged between the buffer structure and the end of the worm 430. Figure 5 The difference between the embodiments is that the buffer structure is not integrally formed on the gear box housing 410, but is integrally formed on the end plate 450.

[0036] As shown in the figure, the buffer structure is also constructed as two opposite cantilever structures 451a and 451b, which are bent away from each other from the upper surface of the end plate 450 toward the end wall of the gearbox housing 410 in the axial direction of the worm 430, and abut against the axial end wall of the gearbox housing 410. In this example, the cantilever structure is constructed as an elastic fin.

[0037] Figure 8A gearbox assembly 500 according to another embodiment of the present invention is shown, which includes a gearbox housing 510, a worm wheel (not shown) and a worm 530, the worm wheel and the worm are meshed with each other and installed in the gearbox housing 510, and a buffer structure is integrally formed on an end plate 550. Figure 7 The difference between the embodiment of the present invention and the embodiment of the present invention is that the two cantilever structures of the buffer structure are respectively encapsulated with elastic sheets 560a and 560b to increase the strength of the buffer structure. In this embodiment, the elastic sheet is made of metal, such as a steel sheet.

[0038] In some cases, the features disclosed in the present invention may be used independently of other features. On the other hand, when necessary, the features disclosed in the present invention may be combined to provide various combinations.

[0039] The words and expressions used in the present invention are illustrative rather than restrictive, and therefore the use of these words and expressions is not intended to exclude any equivalent examples of the features illustrated and described from the scope of the present invention. Various modifications, variations and alternatives may exist within the scope of the claims. For example, the description in the specification is directed to a worm gear motor, but it is understood that the present invention is also applicable to other types of motors. Therefore, the claims are intended to cover all such equivalent examples.

Claims

1. A gearbox assembly for a motor assembly, the gearbox assembly comprising a gearbox housing, and a worm wheel and a worm mounted in the gearbox housing, the worm wheel and the worm being meshed with each other and characterized in that: A buffer structure is provided in a space of the gearbox housing defining an end portion for accommodating the worm, and the buffer structure extends into the space.

2. The gearbox assembly according to claim 1, characterized in that: There is a gap between the end of the worm and an end wall of the gearbox housing in the axial direction of the worm, and the end plate is installed in the gap so that the buffer structure faces the end wall of the gearbox housing.

3. The gearbox assembly according to claim 1, characterized in that: The buffer structure is integrally formed on the side wall of the gear box housing.

4. The gearbox assembly according to claim 2, wherein the buffer structure is integrally formed on an end surface of one side of the end plate. 5 . The gearbox assembly according to claim 3 , wherein the buffer structure is constructed as two opposite cantilever structures.

6. The gearbox assembly according to claim 3, characterized in that: The buffer structure is bent toward the end of the worm.

7. The gearbox assembly according to claim 4, characterized in that: The buffer structure is bent outward from the end surface of the end plate.

8. The gearbox assembly according to claim 5, characterized in that: The cantilever structure is configured in the form of an elastic fin.

9. The gearbox assembly according to claim 3 or 4, characterized in that: The buffer structure is encapsulated with an elastic sheet.

10. The gearbox assembly according to claim 1, characterized in that: The end of the worm gear abuts against the buffer structure.

Images