Middle shaft transmission structure for middle motor

Abstract

The utility model discloses a middle shaft transmission structure for a middle motor, which comprises a casing and a middle shaft, the middle shaft is provided with a torque component and a bull gear, the torque component is provided with a ratchet wheel linked with the bull gear, and transmission bearings are arranged among the bull gear, the middle shaft and the casing; the middle shaft is further provided with an auxiliary bearing, the auxiliary bearing is located on one side of the large gear, the auxiliary bearing is provided with a first spring washer, and the first spring washer is close to or abuts against one side of the ratchet wheel. By adding the auxiliary bearing and the first spring washer, on one hand, the first spring washer can be used for adjusting a gap, and the problem of axial movement of the middle shaft is solved; on the other hand, the hard friction phenomenon of a pure spring washer can be avoided through the application of the auxiliary bearing, a relative sliding state is formed between the first spring washer and the large gear, and the transmission smoothness of the center shaft is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of middle -position motor, and relates to a middle shaft transmission structure for middle -position motor. BACKGROUND

[0002] In the process of mechanical design and manufacturing, part tolerance is one of the inevitable factors, which refers to the tolerance range of the size and shape of mechanical parts.

[0003] As Figure 1 The middle shaft transmission structure shown in the figure, including the shell 1' and the middle shaft 2', the middle shaft 2' is provided with the torque assembly 3' and the big gear 4', the torque assembly 3' is provided with the ratchet wheel 5' linked with the big gear 4', the big gear 4', the middle shaft 2' and the shell 1' are provided with transmission bearing 6'. The above-mentioned middle shaft 2' in use, due to the existence of tolerance, the cooperation of the middle shaft and other components can not reach the perfect tight state, thereby leading to axial movement.

[0004] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a kind of middle shaft transmission structure for middle -position motor, by improvement, improve the problem of existing middle shaft axial movement.

[0006] The utility model aims to realize by the following technical scheme:

[0007] A kind of middle shaft transmission structure for middle -position motor, including shell and middle shaft, the middle shaft is provided with torque assembly and big gear, the torque assembly is provided with the ratchet wheel linked with big gear, the big gear, middle shaft and shell are provided with transmission bearing;The auxiliary bearing is also provided on the middle shaft, the auxiliary bearing is located big gear side, first elastic pad is provided on the auxiliary bearing, the first elastic pad is adjacent or abuts to ratchet wheel side.

[0008] As a further improvement of the utility model one embodiment, wherein the shell is composed of shell main body and front cover.

[0009] As a further improvement of the utility model one embodiment, wherein the transmission bearing adjacent shell main body side is provided with second elastic pad, and the second elastic pad is adjacent or abuts to shell main body.

[0010] As a further improvement of the utility model one embodiment, wherein the big gear and middle shaft form the cavity for the auxiliary bearing to be placed, the auxiliary bearing is located in the cavity, the outer ring of the auxiliary bearing abuts to big gear side, and the first elastic pad is arranged on the inner ring of the auxiliary bearing.

[0011] As a further improvement of the embodiment of the present application, the first elastic pad is in a whole annular structure, and the first elastic pad has a first convex ridge formed by bending.

[0012] As a further improvement of the embodiment of the present application, the second elastic pad is in a whole annular structure, and the second elastic pad has a second convex ridge formed by bending.

[0013] The above technical solution has the following beneficial effects: by increasing the auxiliary bearing and the first elastic pad, on the one hand, the first elastic pad can be used to adjust the gap and overcome the problem of axial movement of the shaft; on the other hand, the application of the auxiliary bearing can avoid the hard friction phenomenon of the elastic pad alone, so that the relative sliding state is formed between the first elastic pad and the gear, and the smoothness of the shaft transmission is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other embodiments can be derived from the provided drawings without creative labor.

[0015] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0016] Figure 1 The structure schematic diagram of the shaft transmission structure provided in the background art.

[0017] Figure 2 The first state structure schematic diagram provided by the present application.

[0018] Figure 3 The auxiliary bearing and the first elastic pad provided by the present application form a three-dimensional schematic diagram.

[0019] Figure 4 The partial three-dimensional schematic diagram provided by the present application.

[0020] In the drawings:

[0021] 1', 1, cabinet; 11, cabinet body; 12, front cover;

[0022] 2', 2, central shaft;

[0023] 3', 3, torque assembly;

[0024] 4', 4, bull gear;

[0025] 5', 5, ratchet wheel;

[0026] 6', 61, 62, 63, transmission bearing;

[0027] 7, auxiliary bearing;

[0028] 8, first elastic pad;

[0029] 9, second elastic pad. DETAILED DESCRIPTION

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0032] In the present application, unless otherwise specified, the orientation words such as "upper, lower, top, bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves. Similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application. EMBODIMENT

[0033] Referring to Figures 2-4 shown, a central shaft transmission structure for an in-line motor, the basic structure includes a casing 1 and a central shaft 2, wherein the central shaft 2 is equipped with a torque assembly 3 and a bull gear 4. The torque assembly 3 is further equipped with a ratchet wheel 5 which is interlinked with the bull gear 4 to realize the transmission of power. Between the bull gear 4, the central shaft 2 and the casing 1, the transmission bearings 61, 62, 63 ensure smooth and stable rotation. The casing 1 is composed of a casing body 11 and a front cover 12, which are locked by bolts, facilitating assembly and maintenance.

[0034] Compared with the prior art, the main improvement of the present structure is that an auxiliary bearing 7 and a first elastic pad 8 are added, which reduces the problem of axial movement caused by improper tolerance fit. Therefore, the design of the bull gear 4 is optimized to facilitate the installation of the added auxiliary bearing 7 and the first elastic pad 8.

[0035] Specifically, an auxiliary bearing 7 is arranged on the middle shaft 2, which is carefully placed in the cavity formed by the large gear 4 and the middle shaft 2. The outer ring of the auxiliary bearing 7 is tightly attached to one side of the large gear 4, ensuring that when the large gear 4 rotates, the outer ring of the auxiliary bearing 7 can rotate synchronously, thereby effectively reducing friction and wear, and improving the smoothness of the overall transmission. A first elastic pad 8 is arranged on the auxiliary bearing 7. The first elastic pad 8 is placed on the inner ring of the auxiliary bearing 7, and its position is close to or tightly attached to one side of the ratchet 5. The introduction of the first elastic pad 8 can effectively adjust and compensate for the small gap that may exist in the transmission structure, thereby effectively overcoming the problem of axial movement of the middle shaft 2 at high speed, ensuring the stability and accuracy of the transmission.

[0036] In this embodiment, the first elastic pad 8 is designed as a whole ring structure, and this shape is chosen to ensure that it can be installed on the inner ring of the auxiliary bearing 7 without interfering with the normal operation of other transmission components. Moreover, the first elastic pad 8 is cleverly curved to form a first convex ridge. This design not only enhances the structural strength of the first elastic pad 8, but also enables it to deform more uniformly when subjected to pressure, thereby more effectively adjusting the gap and absorbing vibration.

[0037] In this embodiment, in order to further improve the stability and buffering capacity of the transmission structure, a second elastic pad 9 is additionally arranged on the transmission bearing 63 near one side of the main body 11 of the shell. This design enables the second elastic pad 9 to tightly adhere or abut against the main body 11 of the shell, thereby effectively absorbing and dispersing the vibration and impact force from the middle shaft 2 and the large gear 4 during transmission, which helps to improve the axial movement problem of the middle shaft 2.

[0038] In this embodiment, the design of the second elastic pad 9 is in harmony with the first elastic pad 8, and also adopts a whole ring structure. This design ensures that the second elastic pad 9 can tightly adhere to the outer ring of the transmission bearing 63 without affecting the normal operation of other transmission components. Similarly, the second elastic pad 9 is also curved to form a second convex ridge, enabling it to deform more uniformly when subjected to pressure, effectively absorbing vibration and impact, and improving the stability and durability of the entire transmission structure.

[0039] The utility model discloses a cleverly increase the application of auxiliary bearing and first elastic pad, and we realize the promotion of multiple effects. On the one hand, the introduction of first elastic pad can effectively adjust and compensate the possible tiny gap in transmission structure, thereby effectively overcoming the axial runout problem that middle shaft can produce when high speed rotates, and ensuring the stability and accuracy of transmission. On the other hand, the clever application of auxiliary bearing avoids the hard friction phenomenon that can be brought by simply relying on elastic pad. It makes the non-direct contact between first elastic pad and big gear, and forms the state of relative sliding. This design not only reduces the friction loss, but also significantly improves the fluency of middle shaft transmission.

[0040] Obviously, the above-described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

[0041] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or their combination.

[0042] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0043] The above only describes the preferred embodiments of the utility model, and does not limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A kind of middle shaft transmission structure for middle motor, including shell and middle shaft, torque assembly and large gear are provided on the middle shaft, ratchet is provided on the torque assembly and is linked with large gear, transmission bearing is provided between the large gear, middle shaft and shell;With it is characterized that: The middle shaft is further provided with an auxiliary bearing, which is located at one side of the gear wheel, and the auxiliary bearing is provided with a first elastic pad, which is adjacent to or abuts against one side of the ratchet wheel.

2. The transmission arrangement of claim 1, wherein: The machine shell is composed of a machine shell body and a front cover.

3. The transmission arrangement of claim 2, wherein: The transmission bearing adjacent to one side of the machine shell body is provided with a second elastic pad, which is adjacent to or abuts against the machine shell body.

4. The transmission arrangement of claim 1, wherein: The gear wheel and the middle shaft jointly form a cavity for placing the auxiliary bearing, the auxiliary bearing is located in the cavity, the outer ring of the auxiliary bearing abuts against one side of the gear wheel, and the first elastic pad is arranged on the inner ring of the auxiliary bearing.

5. The transmission arrangement of claim 4, wherein: The first elastic pad has a whole circular ring structure, and the first elastic pad is provided with a first convex ridge which is curved.

6. The transmission arrangement of claim 3, wherein: The second elastic pad has a whole circular ring structure, and the second elastic pad is provided with a second convex ridge which is curved.

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