A transmission structure of a hand-held electric grinder

Abstract

The present invention discloses a transmission structure of a hand-held electric grinder, specifically relating to the technical field of electric grinders. It includes a housing, a motor is installed inside the housing, a transmission wheel is arranged at one end of the motor, a first spring is provided on one side of the transmission wheel, a transmission shaft is installed at one end of the first spring, and a bearing body is sleeved outside the transmission shaft. The present invention improves the previous structural design. Two groups of clamping rods are integrally formed at both ends of the first spring, and the clamping rods are respectively placed in the first clamping groove and the second clamping groove, so that the transmission wheel and the transmission shaft are connected together through the first spring. The motor is used to drive the transmission wheel and the first spring, thereby driving the transmission shaft and the chuck to rotate and complete the rotary transmission operation, greatly reducing the vibration brought by the rigid connection to the equipment, and having a higher concentricity. The bearing body and the housing are softly isolated and fixed by a soft rubber ring, and the whole machine has less noise. This design has a simple structure and is more comfortable to use.

Description

Technical Field

[0001] The present invention relates to the technical field of electric grinders, and more specifically, to a transmission structure of a handheld electric grinder. Background Art

[0002] A handheld electric grinder is a device used for manicure grinding. However, in use, due to the design problems of the transmission mechanism in many machines, the transmission part uses plastic or other rigid connections, resulting in large vibrations during use, poor concentric rotation effect, and a rigid fixation between the bearing body and the housing. The product makes a very loud noise during operation, and when replacing the grinding head, it is very cumbersome, very uncomfortable to use, and very impractical. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a transmission structure of a handheld electric grinder to solve the problems raised in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solution: A transmission structure of a handheld electric grinder, including a housing, a motor is installed inside the housing, a transmission wheel is provided at one end of the motor, a first spring is provided on one side of the transmission wheel, a transmission shaft is installed at one end of the first spring, a chuck is connected to one end of the transmission shaft by a thread, a chuck sleeve is movably provided on the surface of the chuck, and chuck sleeve openings are provided at both ends of the chuck sleeve. A front cover and a bearing body are provided at one end of the housing, and a limiting plate is provided on the inner wall of the housing;

[0005] The bearing body includes a shaft sleeve, at least two rubber ring installation grooves are provided on the surface of the shaft sleeve, rubber rings are provided in the rubber ring installation grooves, a dust-proof pad is provided at one end of the shaft sleeve close to the chuck, a pre-pressure spring is provided inside the shaft sleeve, and rollers are installed at both ends of the pre-pressure spring;

[0006] A boss is provided at the end of the transmission wheel, and a first card slot is provided on the surface of the boss;

[0007] A set of clamping rods are respectively provided at both ends of the first spring;

[0008] A second card slot is provided at the other end of the transmission shaft, and a limiting platform is provided at the middle position of the transmission shaft.

[0009] In a preferred embodiment, a set of clamping rods on the first spring are engaged with the first card slot on the transmission wheel, and another set of clamping rods on the first spring are engaged with the second card slot on the transmission shaft.

[0010] In a preferred embodiment, the transmission wheel on the motor is connected to the transmission shaft by a first spring.

[0011] In a preferred embodiment, the first spring and the clamping rod are integrally formed therebetween.

[0012] In a preferred embodiment, an inner side of the housing is provided with a bearing body cavity adapted to the bearing body.

[0013] In a preferred embodiment, the first card slot and the second card slot are in a straight line shape.

[0014] In a preferred embodiment, a plurality of through slots are formed in a portion of the chuck near the chuck socket, and the length of the through slots can be freely adjusted according to the size of the actual whole machine product.

[0015] In a preferred embodiment, a tail portion of the transmission shaft near one end of the second card slot is conical, facilitating the assembly of the first spring.

[0016] In a preferred embodiment, the chuck sleeve is open, and an opening of the chuck sleeve near one end of the chuck socket is in a flared shape.

[0017] In a preferred embodiment, an end portion near the chuck socket is in a flared shape and matches the opening of the chuck sleeve.

[0018] Technical effects and advantages of the present invention:

[0019] The present invention improves the previous structural design. Two groups of clamping rods are integrally formed at both ends of the first spring, and the clamping rods are respectively placed in the first card slot and the second card slot, so that the transmission wheel and the transmission shaft are connected together by the first spring. Then, the motor, the transmission wheel, the first spring, the bearing body, the chuck, and the transmission shaft are sequentially installed inside the housing, thus completing the overall assembly. The motor is used to drive the transmission wheel and the first spring, thereby driving the transmission shaft and the chuck to rotate and completing the rotary transmission operation, greatly reducing the vibration brought by the rigid connection to the device, and having a higher concentricity. The design has a simple structure and is more comfortable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is an exploded schematic diagram of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the first spring, the bearing body, and the transmission shaft in the present invention.

[0023] Figure 4 It is a schematic diagram of the sectional structure of the housing in the present invention.

[0024] Figure 5 It is a schematic diagram of the separated structure of the transmission wheel and the bearing body in the present invention.

[0025] Figure 6 This is a schematic separation structure diagram of the transmission wheel, the first spring, and the transmission shaft in the present invention.

[0026] Figure 7 This is a schematic plan structure diagram of the transmission wheel, the first spring, and the transmission shaft in the present invention.

[0027] Figure 8 This is a schematic three-dimensional structure diagram of the transmission wheel, the first spring, and the transmission shaft in the present invention.

[0028] Figure 9 This is a schematic structure diagram of the shaft sleeve and the rubber ring installation groove in the present invention.

[0029] The reference numerals are: 1 housing, 2 motor, 3 transmission wheel, 31 first card slot, 4 first spring, 41 clamping rod, 5 bearing body, 6 chuck, 61 chuck socket, 62 through slot, 7 transmission shaft, 71 second card slot, 72 limiting platform, 8 second spring, 9 shaft sleeve, 91 rubber ring installation groove, 92 preloading spring, 93 roller, 10 rubber ring, 11 dust-proof pad, 12 chuck sleeve, 13 chuck sleeve opening, 14 front cover, 15 limiting plate. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] As shown in the attached Figure 1 - attached Figure 9 A transmission structure of a hand-held electric grinder shown in the figure includes a housing 1, a motor 2 is installed inside the housing 1, a transmission wheel 3 is provided at one end of the motor 2, a first spring 4 is provided on one side of the transmission wheel 3, a transmission shaft 7 is installed at one end of the first spring 4, one end of the transmission shaft 7 is threadedly connected to a chuck 6, a chuck sleeve 12 is movably provided on the surface of the chuck 6, chuck sleeve openings 13 are provided at both ends of the chuck sleeve 12, and a front cover 14 and a bearing body 5 are provided at one end of the housing 1, and a limiting plate 15 is provided on the inner wall of the housing 1;

[0032] The bearing body 5 includes a shaft sleeve 9, at least two rubber ring installation grooves 91 are provided on the surface of the shaft sleeve 9, rubber rings 10 are provided in the rubber ring installation grooves 91, a dust-proof pad 11 is provided at one end of the shaft sleeve 9 close to the chuck, a preloading spring 92 is provided inside the shaft sleeve 9, and rollers 93 are installed at both ends of the preloading spring 92;

[0033] A boss is provided at the end of the driving wheel 3, and a first card slot 31 is formed on the surface of the boss;

[0034] A set of clamping rods 41 are respectively provided at both ends of the first spring 4;

[0035] A second card slot 71 is formed at the other end of the transmission shaft 7, and a limiting platform 72 is provided at the middle position of the transmission shaft 7.

[0036] In some embodiments, a set of clamping rods 41 on the first spring 4 are engaged with the first card slot 31 on the driving wheel 3, and another set of clamping rods 41 on the first spring 4 are engaged with the second card slot 71 on the transmission shaft 7.

[0037] The driving wheel 3 on the motor 2 is connected to the transmission shaft 7 through the first spring 4; the first spring 4 and the clamping rods 41 are integrally formed; a bearing body cavity adapted to the bearing body 5 is provided inside the housing 1; the first card slot 31 and the second card slot 71 are in a straight shape.

[0038] Multiple through slots 62 are formed at the part of the chuck 6 close to the chuck socket 61, and the length of the through slots 62 can be freely adjusted according to the size of the actual whole machine product; the tail of the transmission shaft 7 close to one end of the second card slot 71 is conical, which is convenient for assembling the first spring 4; the chuck sleeve opening 13, and the chuck sleeve opening 13 close to one end of the chuck socket 61 is flared; the end part close to the chuck socket 61 is flared and matches the chuck sleeve opening 13.

[0039] The working principle of the present invention:

[0040] Two sets of clamping rods 41 are integrally formed at both ends of the first spring 4, and the clamping rods 41 are respectively placed in the first card slot 31 and the second card slot 71, so that the driving wheel 3 and the transmission shaft 7 are connected together through the first spring 4. The bearing body 5 is sleeved outside the transmission shaft 7, and the motor 2, the driving wheel 3, the first spring 4, the bearing body 5, the chuck 6, and the transmission shaft 7 are sequentially installed inside the housing 1, thus completing the overall assembly. The motor 2 is used to drive the driving wheel 3 and the first spring 4, so as to drive the transmission shaft 7 and the chuck 6 to rotate, and complete the rotary transmission operation, greatly reducing the vibration brought by the rigid connection to the equipment, and the concentricity is also higher. The bearing body 5 and the housing 1 are softly isolated and fixed by the shaft sleeve 9, the rubber ring installation groove 91, and the rubber ring 10, and the noise of the whole machine is smaller. The design structure is simple and more comfortable to use.

[0041] When replacing the grinding head, only need to unscrew the front cover at the lower end of the shell 1, push the bearing body 5 backward, the limiting platform 72 on the transmission shaft 7 abuts against the limiting plate 15. At this time, the collet 6 remains stationary and the spring 4 retracts. The collet sleeve 12 slides backward, and the collet socket 61 loosens. At this time, the grinding head can be removed; after replacement, only need to loosen the bearing body 5. Under the elastic force of the spring 4, the collet sleeve 12 slides forward, and the collet sleeve port 13 abuts against the flared structure at the end of the collet socket 61. At this time, the collet socket 61 is locked, and the operation is very convenient and simple.

[0042] Finally, several points should be noted: First, in the description of the present application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0043] Second: In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the usual design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0044] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transmission structure of a hand-held electric grinder, comprising a housing (1), characterized in that: A motor (2) is installed inside the housing (1). One end of the motor (2) is provided with a transmission wheel (3). One side of the transmission wheel (3) is provided with a first spring (4). One end of the first spring (4) is installed with a transmission shaft (7). One end of the transmission shaft (7) is threadedly connected with a chuck (6). The surface of the chuck (6) is movably provided with a chuck sleeve (12). Both ends of the chuck sleeve (12) are provided with chuck sleeve openings (13). One end of the housing (1) is provided with a front cover (14) and a bearing body (5). A limiting plate (15) is provided on the inner wall of the housing (1); The bearing body (5) includes a bushing (9). At least two rubber ring installation grooves (91) are provided on the surface of the bushing (9). Rubber rings (10) are provided in the rubber ring installation grooves (91). A dust-proof pad (11) is provided at one end of the bushing (9) close to the chuck. A preloading spring (92) is provided inside the bushing (9). Roller shafts (93) are installed at both ends of the preloading spring (92); A boss is provided at the end of the transmission wheel (3). A first card slot (31) is provided on the surface of the boss; A group of clamping rods (41) are respectively provided at both ends of the first spring (4); A second card slot (71) is provided at the other end of the transmission shaft (7). A limiting platform (72) is provided at the middle position of the transmission shaft (7); A group of clamping rods (41) on the first spring (4) are engaged with the first card slot (31) on the transmission wheel (3). Another group of clamping rods (41) on the first spring (4) are engaged with the second card slot (71) on the transmission shaft (7); The first spring (4) and the clamping rods (41) are integrally formed; The first card slot (31) and the second card slot (71) are in a straight shape; For the chuck sleeve opening (13), the chuck sleeve opening (13) close to the chuck socket (61) end is in a flared shape.

2. The transmission structure of a hand-held electric grinder according to claim 1, wherein: The transmission wheel (3) on the motor (2) and the transmission shaft (7) are connected by a first spring (4).

3. The transmission structure of a hand-held electric grinding machine according to claim 1, characterized in that: A bearing body cavity adapted to the bearing body (5) is provided on the inner side of the housing (1).

4. A transmission structure of a hand-held electric grinder according to claim 1, characterized in that: Multiple through slots (62) are provided at the part of the chuck (6) close to the chuck socket (61). The length of the through slots (62) can be freely adjusted according to the size of the actual whole machine product.

5. A transmission structure of a hand-held electric grinder according to claim 1, characterized in that: The tail end of the transmission shaft (7) close to the second card slot (71) is in a conical shape, which is convenient for assembling the first spring (4).

6. The transmission structure of a hand-held electric grinder according to claim 4, wherein: The end close to the chuck socket (61) is in a flared shape and matches the chuck sleeve opening (13).

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