Retaining ring anti-falling structure

Abstract

The utility model discloses a retaining ring anti-drop structure, which comprises a transmission shaft, a retaining ring, a retaining ring, a retaining ring, a retaining ring and a retaining ring, the transmission shaft comprises a first shaft section and a second shaft section, the diameters of the first shaft section and the second shaft section are sequentially reduced, a clamping groove is arranged on the peripheral surface of the first shaft section, and a retaining washer groove is axially arranged on the peripheral surface of the second shaft section; the material object sleeves the first shaft section and is positioned on one side, far away from the second shaft section, of the clamping groove; part of the check ring is clamped in the clamping groove of the first shaft section, and the check ring abuts against the real object; the protective sleeve is arranged at the joint of the first shaft section and the second shaft section and is used for axially limiting and radially limiting the check ring; the lock washer is arranged at the lock washer groove of the second shaft section and is propped against the check ring; and the locking nut is mounted on the second shaft section and is used for locking the lock washer. According to the scheme, the protective sleeve is arranged to protect the check ring, the check ring is prevented from falling off, and the stop washer and the locking nut are arranged to prevent the protective sleeve from axially moving.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to an anti-loosening structure for a retaining ring. Background Art

[0002] In the design of a transmission, the transmission shaft needs to rotate at a high speed and transmit torque. Therefore, in order to achieve a series of functions in the transmission, when designing the transmission, a series of parts such as bearings, gears, spacer rings, etc. will be added to the transmission shaft. When these parts are installed on the transmission shaft, retaining rings are usually added for axial positioning. However, in actual design and use, it is found that during the process of the transmission shaft rotating at a high speed and transmitting torque, the retaining ring may become detached, resulting in the failure of positioning in the component, the loss of the function of the component, and a series of subsequent problems. For a transmission shaft that is limited by structure but must use a retaining ring structure, an anti-loosening structure for the retaining ring needs to be designed. Summary of the Utility Model

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide an anti-loosening structure for a retaining ring with a simple structure and good reliability in use, which can prevent the retaining ring from becoming detached when the transmission shaft rotates at a high speed and transmits torque.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An anti-loosening structure for a retaining ring, comprising:

[0006] A transmission shaft, including a first shaft section and a second shaft section with diameters decreasing in sequence. A clamping groove is formed on the outer peripheral surface of the first shaft section, and a retaining washer groove is axially provided on the outer peripheral surface of the second shaft section;

[0007] An object, sleeved on the first shaft section and located on the side of the clamping groove away from the second shaft section;

[0008] A retaining ring, part of which is clamped in the clamping groove of the first shaft section, and the retaining ring abuts against the object;

[0009] A protective sleeve, arranged at the connection of the first shaft section and the second shaft section, for axially limiting and radially limiting the retaining ring;

[0010] A retaining washer, installed at the retaining washer groove of the second shaft section, and it abuts against the retaining ring;

[0011] A locking nut, installed on the second shaft section for locking the retaining washer.

[0012] In this way, the protective sleeve is set to protect the retaining ring to prevent it from falling off, and the retaining washer and the locking nut are set to prevent the protective sleeve from axially moving.

[0013] Preferably, one side of the protective sleeve close to the retaining ring is provided with a first step and a second step. The inner diameter of the first step is larger than that of the second step. The first step includes an A surface for axially limiting the retaining ring and a B surface for radially limiting the retaining ring. The protective sleeve is installed at the connection of the first shaft section and the second shaft section through the second step.

[0014] Preferably, there is a first gap between the A surface of the first step and the retaining ring.

[0015] Preferably, the width of the first gap is smaller than the width of the card slot. This can prevent the retaining ring from axially disengaging from the card slot.

[0016] Preferably, there is a second gap between the B surface of the first step and the retaining ring.

[0017] Preferably, the width of the second gap is smaller than the depth of the card slot. This can prevent the retaining ring from radially disengaging from the card slot.

[0018] Preferably, there is a third gap between the end face of the protective sleeve and the object. This can prevent the protective sleeve from being subjected to the axial force of the object.

[0019] Preferably, the second step includes a C surface and a D surface. The C surface of the second step abuts against the end face of the first shaft section, and the D surface of the second step abuts against the outer peripheral surface of the first shaft section.

[0020] Due to the adoption of the above technical solutions, the present utility model has the following beneficial effects: During the high-speed rotation and torque transmission of the transmission shaft, the retaining ring is likely to fall off due to the centrifugal force generated by the high-speed rotation of the transmission shaft. In the present utility model, by providing a protective sleeve to radially limit and axially limit the retaining ring, the retaining ring is prevented from falling off, and by providing a stop washer and a locking nut, the axial movement of the protective sleeve is prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the transmission shaft;

[0023] Figure 3 is Figure 1 the enlarged view of A in

[0024] Figure 4 is a schematic cross-sectional view of the protective sleeve.

[0025] Reference numerals:

[0026] 1. Drive shaft; 11. First shaft section; 111. Card slot; 12. Second shaft section; 2. Locking nut; 3. Stop washer; 4. Protective sleeve; 41. A surface; 42. B surface; 43. C surface; 44. D surface; 5. Retaining ring; 6. First gap; 7. Third gap; 8. Physical object; 9. Stop washer groove; 10. Second gap. Detailed implementation mode

[0027] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] As Figures 1 to 4 shown, a retaining ring anti - detachment structure includes:

[0031] A drive shaft 1, including a first shaft section 11 and a second shaft section 12 with gradually decreasing diameters. A card slot 111 is formed on the outer peripheral surface of the first shaft section 11, and a stop washer groove 9 is axially provided on the outer peripheral surface of the second shaft section 12;

[0032] A physical object 8 is sleeved on the first shaft section 11 and is located on the side of the card slot 111 away from the second shaft section 12;

[0033] A retaining ring 5, part of which is clamped in the card slot 111 of the first shaft section 11, and the retaining ring 5 abuts against the physical object 8;

[0034] The protective sleeve 4 is arranged at the connection between the first shaft section 11 and the second shaft section 12, and is used for axially limiting and radially limiting the retaining ring 5;

[0035] The stop washer 3 is installed at the stop washer groove 9 of the second shaft section 12 and abuts against the retaining ring 5;

[0036] The locking nut 2 is mounted on the second shaft section 12 and is used to lock the retaining washer 3 .

[0037] In this way, when the transmission shaft 1 rotates at high speed and transmits torque, the retaining ring 5 is radially and axially limited by setting the protective sleeve 4, thereby preventing the retaining ring 5 from falling off, and the protective sleeve 4 is prevented from axial movement by setting the stop washer 3 and the locking nut 2.

[0038] In the utility model, a first step and a second step are provided on one side of the protective sleeve 4 close to the retaining ring 5, the inner diameter of the first step is larger than the inner diameter of the second step, the first step includes an A surface 41 for axially limiting the retaining ring 5 and a B surface 42 for radially limiting the retaining ring 5, and the protective sleeve 4 is installed at the connection between the first shaft section 11 and the second shaft section 12 through the second step.

[0039] Specifically:

[0040] There is a first gap 6 between the A surface 41 of the first step and the retaining ring 5. In order to prevent the retaining ring from being separated from the slot 111, the width of the first gap 6 is smaller than the width of the slot 111.

[0041] There is a second gap 10 between the B surface 42 of the first step and the retaining ring 5. In order to prevent the retaining ring from being separated from the slot 111, the width of the second gap 10 is smaller than the depth of the slot 111.

[0042] In order to prevent the protective sleeve 4 from being subjected to the axial force of the object 8 and thus causing the locking nut 2 to loosen, a third gap 7 is provided between the end surface of the protective sleeve 4 and the object 8 .

[0043] The second step includes a C surface 43 and a D surface 44 . The C surface 43 of the second step abuts against the end surface of the first shaft segment 11 , and the D surface 44 of the second step abuts against the outer peripheral surface of the first shaft segment 11 .

[0044] When the transmission shaft 1 rotates at a high speed and transmits torque, the retaining ring 5 and the transmission shaft 1 are fixed through the groove 111 in the transmission shaft 1. When the transmission shaft 1 rotates at a high speed, the retaining ring 5 is affected by the centrifugal force and tends to separate from the groove 111 on the transmission shaft 1. The object 8 is subjected to a certain axial force in the process of torque transmission of the transmission shaft 1, and a part of the axial force will also act on the retaining ring 5. This part of the axial force squeezes the retaining ring 5 out of the groove 111 on the transmission shaft 1. The retaining ring 5 is affected by the centrifugal force and the part of the axial force of the object 8, and finally the retaining ring 5 is separated from the groove in the transmission shaft 1 during long-term operation.

[0045] The utility model adopts a protective sleeve 4 to limit the retaining ring 5 in radial and axial directions. Specifically:

[0046] When the retaining ring 5 is subjected to the centrifugal force, there is a second gap 10 radially between the protective sleeve 4 and the retaining ring 5. Since the width of the second gap 10 is smaller than the depth of the groove 111 in which the retaining ring 5 is stuck on the transmission shaft 1, when the retaining ring 5 is subjected to the centrifugal force, the B surface 42 of the protective sleeve 4 is first squeezed, but it does not completely separate from the groove 111 of the transmission shaft 1. Under the reaction force of the B surface 42 of the protective sleeve 4, the retaining ring 5 returns to the groove 111 in the transmission shaft 1, preventing the retaining ring 5 from separating from the groove of the transmission shaft 1 due to the centrifugal force.

[0047] When the retaining ring 5 is subjected to the axial force transmitted by the object 8, the retaining ring 5 will disengage to the axial position of the first gap 6. Since the width of the first gap 6 is smaller than the axial width of the retaining ring 5, the retaining ring 5 first contacts the A surface 41 of the protective sleeve 4 before completing the disengagement, so that the first gap 6 disappears. Under the reaction force of the A surface 41 of the protective sleeve 4, the retaining ring 5 is reset to the groove 111 of the transmission shaft 1 to prevent the retaining ring 5 from axially disengaging.

[0048] In order to prevent the protective sleeve 4 from axial movement, the locking nut 2 and the stop washer 3 are used to axially position the protective sleeve 4 to prevent the axial position of the protective sleeve 4 from moving. A third gap 7 is left between the protective sleeve 4 and the object 8 to prevent the protective sleeve 4 from being subjected to the axial force of the object 8, thereby preventing the locking nut 3 from being subjected to the force and loosening.

[0049] All features described in the specification, the attached claims and the drawings, whether alone or in any combination thereof, are important features of the present utility model.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without departing from the principles and spirit of the present invention, those of ordinary skill in the art can make changes, modifications, substitutions, variations, delete some features, add features or re-combine features to form technical solutions within the scope of the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the innovative principles of the present invention still fall within the scope of the technical solutions of the present invention.

Claims

1. A retaining ring anti-slip structure, characterized in that: include: The transmission shaft (1) comprises a first shaft section (11) and a second shaft section (12) of successively decreasing diameters, a retaining groove (111) being provided on an outer circumferential surface of the first shaft section (11), and a retaining washer groove (9) being axially provided on an outer circumferential surface of the second shaft section (12); The object (8) is sleeved on the first shaft section (11) and is located on a side of the slot (111) away from the second shaft section (12); A retaining ring (5), part of which is clamped in a clamping groove (111) of the first shaft section (11), and the retaining ring (5) is in contact with the object (8); A protective sleeve (4) is arranged at the connection between the first shaft section (11) and the second shaft section (12) and is used to axially limit and radially limit the retaining ring (5); A stop washer (3) is installed in the stop washer groove (9) of the second shaft section (12) and abuts against the retaining ring (5); A locking nut (2) is mounted on the second shaft section (12) and is used to lock the locking washer (3).

2. A retaining ring anti-slip structure according to claim 1, characterized in that: A first step and a second step are provided on a side of the protective sleeve (4) close to the retaining ring (5); the inner diameter of the first step is larger than the inner diameter of the second step; the first step comprises an A surface (41) for axially limiting the retaining ring (5) and a B surface (42) for radially limiting the retaining ring (5); the protective sleeve (4) is mounted at the connection between the first shaft section (11) and the second shaft section (12) via the second step.

3. A retaining ring anti-slip structure according to claim 2, characterized in that: A first gap (6) exists between the A surface (41) of the first step and the retaining ring (5).

4. A retaining ring anti-slip structure according to claim 3, characterized in that: The width of the first gap (6) is smaller than the width of the slot (111).

5. The retaining ring anti-slip structure according to claim 2, characterized in that: A second gap (10) exists between the B surface (42) of the first step and the retaining ring (5).

6. A retaining ring anti-slip structure according to claim 5, characterized in that: The width of the second gap (10) is smaller than the depth of the slot (111).

7. A retaining ring anti-slip structure according to claim 2, characterized in that: A third gap (7) exists between the end surface of the protective sleeve (4) and the real object (8).

8. The retaining ring anti-drop structure according to claim 2, characterized in that: The second step comprises a C surface (43) and a D surface (44); the C surface (43) of the second step abuts against the end surface of the first shaft segment (11), and the D surface (44) of the second step abuts against the outer peripheral surface of the first shaft segment (11).

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