A fully enclosed gearbox motor

Abstract

This utility model relates to the field of motor technology, and in particular to a fully enclosed gearbox motor. The motor is covered by a gearbox body, which is mounted on the motor's output shaft and located within the mounting chamber. The gearbox and gearbox body are in a contour fit. A positioning component forms an axial assembly reference between the gearbox and gearbox body. An output shaft opening penetrates the gearbox body's wall. A locking component is fitted onto the output shaft within the gearbox, creating an axial limiting fit between the output shaft and the gearbox body. A deepened fit cavity is located on the bottom surface of the mounting chamber, coaxially aligned with the output shaft opening. A buffer component is placed within the deepened fit cavity to cushion axial loosening and stress. The contour structure eliminates the need for screw fastening during assembly, achieving a completely enclosed design that effectively prevents foreign objects from entering the gearbox, causing problems such as jamming and excessive noise. An annular groove is provided on the gearbox output shaft, which is secured with a snap ring after the gearbox body is assembled.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a fully enclosed gearbox motor. Background Technology

[0002] With the miniaturization of various functional mechanisms and modules such as direction adjustment, switching and locking, and component pushing in the home appliance and automotive industries, the motors used inside require greater torque, smaller size, slower speed, and protection against foreign objects. Therefore, the main direction for improvement and application is to combine motors with gearboxes and ensure their enclosure.

[0003] Meanwhile, during the assembly process of the motor and gearbox, such as Figures 1-2 As shown, the existing technology usually involves connecting the motor and gearbox with screws, and then connecting the gearbox housing to the gearbox. This structure requires many parts and has a complex assembly process. After installation, the gearbox and gearbox housing may loosen, and foreign objects may enter during the assembly process due to the through holes required for screw fastening and the debris generated during the fastening process. This can lead to problems such as jamming inside the gearbox, reduced torque, and abnormal noise. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problems existing in the prior art in the background art, to provide a fully enclosed gearbox motor that can reduce the number of parts, reduce the complexity of the assembly process, and at the same time, the gearbox body is fully enclosed to prevent foreign objects from entering and affecting the performance and noise of the gearbox motor.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fully enclosed gearbox motor, including... Gearbox housing, The motor is a power source. The output shaft of the motor drives the input stage of the gearbox, which is covered by a gearbox body. An installation chamber is formed between the motor and the gearbox body. The installation chamber provides a sealed working environment for the gearbox, realizing the integrated design of the electric drive unit and the transmission unit. The gearbox, the core of the speed transmission, converts the high speed of the motor into high torque output. It is installed on the output shaft of the motor and located in the mounting cavity. The gearbox and the gearbox body are in a contour fit. Positioning components are used to form an axial assembly reference between the gearbox and the gearbox body; The output shaft has a hole that penetrates the gearbox wall to allow the output shaft in the gearbox to pass through and output power. The locking component is sleeved on the output shaft in the gearbox, so that the output shaft in the gearbox and the gearbox body form an axial hard limit fit to prevent the gearbox from moving axially. The deepened fitting cavity, also known as the buffer cavity, is opened on the bottom surface of the mounting chamber and is coaxially set with the output shaft opening. A buffer component is placed inside the deepened fitting cavity to absorb the vibration and impact of the gearbox, especially the axial high-frequency vibration.

[0006] Furthermore, the positioning component includes several interlocking positioning holes and positioning bosses. The positioning holes are opened on the top of the gearbox, and the positioning bosses are installed on the inner wall of the gearbox body. The positioning bosses and positioning holes cooperate to form radial degree of freedom constraints.

[0007] Furthermore, the edge of the positioning boss is chamfered for positioning and guiding installation, reducing assembly difficulty.

[0008] Furthermore, the outer diameter of each pair of positioning holes and positioning bosses is different, which is used to ensure accurate installation and correct misalignment during assembly.

[0009] Furthermore, each pair of positioning holes and positioning bosses in the positioning assembly are either evenly distributed or eccentrically arranged.

[0010] Furthermore, the locking component is a snap ring, which consumes the vibration energy of the gearbox through elastic deformation. The output shaft of the gearbox has an annular groove, and the snap ring is installed in the annular groove to apply a small axial thrust to the output shaft. While fixing the output shaft, it also eliminates gear meshing clearance noise. The top surface of the gearbox body is provided with a gearbox body boss extending along the axial direction. The end face of the gearbox body boss abuts against the retaining ring to form an axial limiting fit, which fixes the gearbox body. This allows the retaining ring to be simultaneously limited between the annular groove of the gearbox output shaft and the gearbox body boss, thus forming a double locking mechanism to achieve the assembly of the gearbox body and the gearbox.

[0011] Furthermore, the buffer element is a spring sheet or a spring.

[0012] Furthermore, the axial depth of the mating cavity is increased to be greater than its radial width, forming an assembly space for accommodating the buffer component.

[0013] Furthermore, the output shaft in the gearbox is inserted into the output shaft opening, and the mounting chamber formed between the motor and the gearbox body is a sealed mounting chamber, a dynamic sealed space that isolates the external environment and prevents dust, moisture and other substances from entering. It can also be used in conjunction with a sealing structure, and the closed structure facilitates the circulation and heat dissipation of lubricating oil mist.

[0014] Furthermore, the inner cavity contour of the gearbox body and the outer ring contour of the gearbox are in a contour fit.

[0015] The beneficial effects of this utility model are: 1. The gearbox body and gearbox adopt a contour-following structure, which eliminates the need for conventional screw fastening in the assembly of the gearbox components, and prevents the gearbox and gearbox body from wobbling after assembly; and the positioning holes and corresponding positioning bosses facilitate installation positioning and assist in assembly fastening; thereby reducing the number of parts, simplifying the assembly structure, and making the assembly of the whole machine easier. 2. After removing the screw holes required for screw fastening, the gearbox body is completely enclosed, effectively preventing foreign objects from entering the gearbox and causing problems such as jamming and poor noise. 3. The output shaft of the gearbox is provided with an annular groove, which is used to clamp the gearbox body with a snap ring after the gearbox body is assembled, making the gearbox body and gearbox more secure in the axial direction and playing a role in assisting to support the axial force. 4. The gearbox has a deepened cavity to accommodate buffer parts such as spring plates or springs, which serves to buffer axial loosening and stress. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a structural diagram of existing technology; Figure 2 This is a cross-sectional view of a gearbox body in the prior art; Figure 3 This is a schematic diagram of the structure of Embodiment 1 of this utility model; Figure 4 This is an exploded view of Embodiment 1 of this utility model; Figure 5 This is a cross-sectional view of Embodiment 1 of this utility model; Figure 6 This is a perspective view of the gearbox body in Embodiment 1 of this utility model; Figure 7 This is an internal view of the gearbox body in Embodiment 1 of this utility model; Figure 8 This is a cross-sectional view of the gearbox body in Embodiment 1 of this utility model; Figure 9 This is a schematic diagram of the structure of the top plate in the gearbox in Embodiment 1 of this utility model; Figure 10 This is a schematic diagram of the gearbox structure in Embodiment 1 of this utility model; Figure 11 This is a schematic diagram of the assembly of the gearbox and gearbox body in Embodiment 1 of this utility model; Figure 12 This is a schematic diagram of the structure in Embodiment 2 of this utility model; Figure 13 This is a schematic diagram of the gearbox body in Embodiment 2 of this utility model; In the diagram: 1. Gearbox housing, 11. Output shaft opening, 12. Deepened mating cavity, 13. Locating boss, 14. Gearbox housing boss. 2. Gearbox, 21. Output shaft, 211. Annular groove, 22. Positioning hole, 3. Motor, 4. Buffer, 5. Snap ring. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] Example 1: like Figures 3-11 The illustrated fully enclosed gearbox motor includes like Figures 6-8 As shown, the output shaft opening 11 of the gearbox 1 penetrates the box wall of the gearbox 1 and is used to pass through the output shaft 21 in the gearbox 2. The motor 3 is covered by a gearbox 1, and an installation chamber is formed between the motor 3 and the gearbox 1; like Figure 9 As shown, gearbox 2 is mounted on the output shaft of motor 3 and located within the mounting cavity, as... Figure 11 As shown, the inner contour of gearbox 1 and the outer contour of gearbox 2 are in a contour-following fit. A contour-following fit is an assembly method in which two or more mechanical parts are precisely joined through perfectly matching contour shapes. Its core lies in utilizing the complementarity of geometric shapes to achieve specific functions (such as positioning, sealing, and force transmission), ensuring a secure circumferential installation. Figure 4 As shown, this application takes a rhombus shape as an example. The inner cavity contour of the gearbox 1 is rhomboid, and the outer ring contour of the gearbox 2 that matches it is also rhomboid. The shape is adjusted according to actual needs. The output shaft 21 in the gearbox 2 is inserted into the output shaft opening 11. The motor 3 and the gearbox 1 form a sealed installation chamber, which replaces the installation method of additional screw fastening. The installation is firm and there is no looseness. It eliminates the possibility of screw residue falling off. At the same time, it removes the through holes required for screw installation on the gearbox 1. In this way, it prevents foreign matter and debris generated during the screw fastening process from entering the interior of the gearbox 2 due to the presence of holes before the screw is sealed, which would cause the gearbox 2 to jam and make abnormal noise.

[0020] like Figures 6-9 As shown, the positioning assembly is used to form an axial assembly reference between the gearbox 2 and the gearbox body 1; specifically, the positioning assembly includes several interlocking positioning holes 22 and positioning bosses 13, such as... Figure 9 As shown, the positioning hole 22 is formed on the top of the gearbox 2, as... Figures 6-8 As shown, the positioning boss 13 is installed on the inner wall of the gearbox body 1. The positioning boss 13 and the positioning hole 22 are fitted together to form a radial degree of freedom constraint. This fit can be a clearance fit, which compensates for machining errors and ensures coaxiality.

[0021] like Figure 8 As shown, the edge of the positioning boss 13 is provided with a chamfer for positioning and guiding installation, and the bottom of the gearbox 2 is tightly fitted with the gearbox body 1 to assist in assembly and clamping.

[0022] Meanwhile, the outer diameter of each pair of positioning holes 22 and positioning bosses 13 is different, which is used to ensure accurate installation and prevent misplacement.

[0023] like Figure 6 As shown, according to the overall installation requirements, each pair of positioning holes 22 and positioning bosses 13 in the positioning assembly are evenly distributed, resulting in more uniform force distribution after installation with the hands.

[0024] like Figures 3-5 As shown, the locking assembly is sleeved on the output shaft 21 in the gearbox 2, so that the output shaft 21 in the gearbox 2 and the gearbox body 1 form an axial limiting fit; specifically, the locking assembly is a snap ring 5, replacing the currently used snap ring locking structure, such as Figure 10 As shown, an annular groove 211 is provided on the shaft of the output shaft 21 of the gearbox 2; The top surface of gearbox 1 is provided with a gearbox boss 14 extending along the axial direction. The end face of the gearbox boss 14 abuts against the snap ring 5 to form an axial limiting fit, so that the snap ring 5 is simultaneously limited between the annular groove 211 of the output shaft of gearbox 2 and the gearbox boss 14, realizing the assembly of gearbox 1 and gearbox 2. After the gearbox 1 and gearbox 2 are assembled, the snap ring 5 is installed in the annular groove 211, which reduces the looseness between the output shaft 21 and gearbox 1 in the axial direction. At the same time, when the output shaft 21 is subjected to axial load, it plays an auxiliary support role with the table surface of gearbox 1, which to a certain extent prevents damage to gearbox 2 at the customer's end and ensures the functional safety of gearbox 2 and motor 3.

[0025] like Figure 5 and Figure 8 As shown, the deepened fitting cavity 12 is formed on the bottom surface of the mounting chamber and is coaxially arranged with the output shaft opening 11. A buffer element 4 is placed inside the deepened fitting cavity 12. The axial depth of the deepened fitting cavity 12 is greater than its radial width, forming an assembly space for accommodating the buffer element 4, such as a spring sheet or spring, thus acting as a buffer clearance and reducing axial wobble. During motor installation and use, when the output shaft 21 in the gearbox 2 is subjected to axial force, it can form a buffer between the gearbox body 1 and the gearbox 2, playing a role in preventing collisions and better protecting the structure of the gearbox 2 while reducing vibration and noise.

[0026] Example 2: The difference from Example 1 is that: Figures 12-13 As shown, each pair of positioning holes 22 and positioning bosses 13 in the positioning assembly are eccentrically set, and the positioning bosses 13 and positioning holes 22 are adjusted to their corresponding positions, so that the force is more balanced when the customer installs and uses them.

[0027] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A totally enclosed gear case motor characterized by: include Gearbox housing (1) The motor (3) is covered with a gearbox (1), and an installation chamber is formed between the motor (3) and the gearbox (1); The gearbox (2) is mounted on the output shaft of the motor (3) and located in the mounting cavity. The gearbox (2) and the gearbox body (1) are in a contour fit. A positioning component is used to form an axial assembly reference between the gearbox (2) and the gearbox body (1); The output shaft opening (11) penetrates the wall of the gearbox body (1) and is used to pass through the output shaft (21) in the gearbox (2). The locking assembly is sleeved on the output shaft (21) in the gearbox (2), so that the output shaft (21) in the gearbox (2) and the gearbox body (1) form an axial limiting fit; A deeper mating cavity (12) is opened on the bottom surface of the mounting chamber and is coaxially arranged with the output shaft opening (11). A buffer (4) is placed inside the deeper mating cavity (12).

2. A totally enclosed gear case motor according to claim 1, characterized in that: The positioning component includes several interlocking positioning holes (22) and positioning bosses (13). The positioning holes (22) are opened on the top of the gearbox (2), and the positioning bosses (13) are installed on the inner wall of the gearbox body (1). The positioning bosses (13) and the positioning holes (22) cooperate to form radial degree of freedom constraints.

3. The fully enclosed gearbox motor according to claim 2, characterized in that: The positioning boss (13) has a chamfer at its edge for positioning and guiding installation.

4. A totally enclosed gear case motor according to claim 2, characterized in that: The outer diameter of each pair of positioning holes (22) and positioning bosses (13) is different.

5. A totally enclosed gear case motor according to claim 2, characterized in that: In the positioning component, each pair of positioning holes (22) and positioning bosses (13) are evenly distributed or eccentrically arranged.

6. A totally enclosed gear case motor as claimed in claim 1, wherein: The locking assembly is a snap ring (5). An annular groove (211) is provided on the shaft of the output shaft (21) of the gearbox (2), and the snap ring (5) is installed in the annular groove (211). The top surface of the gearbox body (1) is provided with a gearbox body boss (14) extending along the axial direction. The end face of the gearbox body boss (14) abuts against the snap ring (5) to form an axial limiting fit, so that the snap ring (5) is simultaneously limited between the annular groove (211) of the output shaft of the gearbox (2) and the gearbox body boss (14), thereby realizing the assembly of the gearbox body (1) and the gearbox (2).

7. A fully enclosed gearbox motor according to claim 1, characterized in that: The buffer (4) is a spring sheet or a spring.

8. A totally enclosed gear case motor as claimed in claim 1, wherein: The axial depth of the deepened mating cavity (12) is greater than its radial width, forming an assembly space for accommodating the buffer (4).

9. A totally-enclosed gear-case motor according to claim 1, characterized in that: The output shaft (21) of the gearbox (2) is inserted into the output shaft opening (11), and the motor (3) and the gearbox body (1) form a sealed mounting chamber.

10. A totally enclosed gear case motor as claimed in claim 1, wherein: The inner cavity contour of the gearbox body (1) and the outer ring contour of the gearbox (2) are in a conformal fit.

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