Waterproof and dustproof mechanism at rear end of main shaft

Abstract

The utility model discloses a main shaft rear end waterproof and dustproof mechanism, which comprises a rotor and a rear cover sleeved on the outer side of the upper end of the rotor, an abutting ring and a bearing are sleeved on the outer side of the lower end of the rotor, the abutting ring is positioned at the upper end of the bearing, a water jacket is sleeved on the outer sides of the abutting ring and the bearing, and the water jacket is positioned at the lower end of the rear cover. According to the waterproof and dustproof mechanism at the rear end of the main shaft, limiting balls can be clamped with clamping grooves in the outer side of a butt joint cylinder through movement of a conical cylinder, and therefore the working stability of the isolation mechanism is guaranteed; the water jacket and the rear cover can be subjected to double sealing through deformation generated by the main sealing ring and the secondary sealing ring, so that the waterproof and dustproof effects of the mechanism are further guaranteed, the fixing cylinder and the butt joint cylinder are arranged, the butt joint cylinder can be installed between the fixing cylinder and the rear cover, and therefore the sealing effect is improved. The isolation effect of the fixed cylinder and the butt joint cylinder on the gap of the mechanism is effectively ensured, and the waterproof and dustproof effects of the mechanism are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of main shaft rear end sealing, in particular to a main shaft rear end waterproof and dustproof mechanism. Background Art

[0002] During the operation of the spindle, the internal components of the spindle are generally waterproof and dustproof through a water jacket and a rear cover, thereby reducing the impact of water droplets and dust on the spindle. However, the existing waterproof and dustproof mechanism at the rear end of the spindle still has certain usage defects during use, such as:

[0003] The invention announcement number CN111371235A discloses a rear end waterproof and dustproof mechanism for a mechanical spindle, which sets the first rib ring and the second rib ring to be structures with decreasing height from the inside to the outside, and then through the plug-in cooperation between the first rib ring and the second annular groove, and the plug-in cooperation between the second rib ring and the first annular groove, the first rib ring and the second rib ring are interlaced with each other, thereby playing a multiple barrier role on the inside and outside of the mechanical spindle, which can effectively prevent external water and dust from entering the inside of the spindle through the gap between the rear cover and the water jacket, greatly improving the waterproof and dustproof ability of the rear end of the spindle. In addition, since the protruding height of the rib ring decreases from the inside to the outside, even if a small amount of water and dust enters the first annular groove or the second annular groove, it will be easier to guide the water and dust outward due to the decreasing protruding height of the inner and outer rib rings, thereby further enhancing the waterproof and dustproof performance;

[0004] In the above-mentioned document, during the operation of the mechanism, three groups of air bags are sequentially arranged inside the water jacket and the back cover for sealing, thereby achieving waterproof and dustproof effects, while at the outer gap between the water jacket and the back cover, sealing is performed solely through a rib ring. After the mechanism has been working for a long time, gaps are likely to form between the rib ring and the water jacket and the back cover, which in turn may easily cause dust or water droplets to enter the gap between the water jacket and the back cover, thus affecting the waterproof and dustproof effects of the mechanism.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original waterproof and dustproof structure. Utility Model Content

[0006] The purpose of the utility model is to provide a waterproof and dustproof mechanism at the rear end of the main shaft, so as to solve the problem proposed in the above-mentioned background technology that the outer gap between the water jacket and the rear cover is sealed only by a rib ring, and after the mechanism has been working for a long time, a gap is easily generated between the rib ring and the water jacket and the rear cover, which in turn easily causes dust or water droplets to enter the gap between the water jacket and the rear cover, which easily affects the waterproof and dustproof effect of the mechanism.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waterproof and dustproof mechanism at the rear end of the spindle, comprising a rotor and a rear cover sleeved on the outer side of the upper end of the rotor;

[0008] The outer side of the lower end of the rotor is sleeved with an abutment ring and a bearing, and the abutment ring is located at the upper end of the bearing, and the outer sides of the abutment ring and the bearing are sleeved with a water jacket, and the water jacket is located at the lower end of the rear cover;

[0009] An isolation structure is provided between the water jacket and the back cover, and the isolation structure can achieve efficient dustproof and waterproof effects of the mechanism through the snap-fit ​​principle.

[0010] Preferably, a fixing tube and a docking tube are provided inside the isolation structure, the fixing tube is fixedly mounted on the outside of the rear cover, the docking tube is fixedly mounted on the upper end of the water jacket, and the water jacket is located between the rear cover and the fixing tube.

[0011] Preferably, a moving groove is provided inside the fixed cylinder, and a conical cylinder is slidably mounted on the lower end of the moving groove, and a conical cylinder is fixedly mounted on the upper end of the conical cylinder, and a push rod is mounted at an equal angle on the outer side of the conical cylinder.

[0012] Preferably, a limiting ball is nested inside the moving groove, a sealing ring is nested inside the fixed tube on one side close to the rear cover, and engaging grooves are provided at equal angles on the outer side of the docking tube, and the engaging grooves are engaged with the limiting ball.

[0013] Preferably, a sealing structure is provided between the water jacket and the rear cover, and the sealing structure can improve the dustproof and waterproof effect of the mechanism;

[0014] The outer side of the water jacket is nested with a main sealing ring and a secondary sealing ring, and the volume of the main sealing ring is larger than that of the secondary sealing ring. The main sealing ring is located at the upper end of the water jacket, and the secondary sealing ring is located at the side of the water jacket.

[0015] Preferably, connecting pipes are fixedly installed on the outer sides of the primary sealing ring and the secondary sealing ring, and installation cavities are fixedly installed on the ends of the two groups of connecting pipes away from the primary sealing ring and the secondary sealing ring.

[0016] Preferably, a fixed block is fixedly installed inside the installation cavity, and a sliding rod is slidably installed inside the fixed block, and a support spring is sleeved on the outer side of the sliding rod, and a sealing member is fixedly installed on one end of the sliding rod away from the fixed block, and the support spring is located between the fixed block and the sealing member.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. A fixing tube and a docking tube are provided, and the docking tube can be installed between the fixing tube and the back cover to effectively ensure the isolation effect of the fixing tube and the docking tube on the gap of the mechanism, thereby ensuring the waterproof and dustproof effect of the mechanism;

[0019] 2. A conical cylinder and a limiting ball are provided, and the limiting ball can be engaged with the engaging groove on the outer side of the docking cylinder through the movement of the conical cylinder, thereby ensuring the working stability of the isolation mechanism;

[0020] 3. Furthermore, a main sealing ring and a secondary sealing ring are provided, and the deformation of the main sealing ring and the secondary sealing ring can be used to perform double sealing between the water jacket and the rear cover, thereby further ensuring the waterproof and dustproof effect of the mechanism;

[0021] 4. Furthermore, a support spring and a seal are provided, and the support spring can be used to seal the seal and the installation cavity, thereby isolating the gas flow between the primary sealing ring and the secondary sealing ring, ensuring that after the secondary sealing ring or the primary sealing ring is accidentally damaged, the other set of sealing rings can continue to ensure the waterproof and dustproof effect of the mechanism;

[0022] 5. Furthermore, a push rod is provided, and the angles of the push rod and the limit ball are set to ensure the stability of the engagement between the limit ball and the engagement groove, thereby ensuring the stability of the limit of the docking tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0024] Figure 2 This is a front cross-sectional structural diagram of the fixed cylinder of the utility model;

[0025] Figure 3 This is a schematic diagram of the front view structure of the utility model;

[0026] Figure 4 This is a schematic diagram of the top view of the conical cylinder structure of the utility model;

[0027] Figure 5 This is a schematic diagram of the front cross-sectional structure of the main sealing ring of the utility model;

[0028] Figure 6 This is a front view structural diagram of the sealing member of the utility model.

[0029] In the figure: 1. rotor; 2. water jacket; 3. rear cover; 4. abutment ring; 5. bearing; 6. primary sealing ring; 7. secondary sealing ring; 8. connecting pipe; 9. mounting cavity; 10. fixing block; 11. sliding rod; 12. supporting spring; 13. sealing element; 14. fixing cylinder; 15. moving groove; 16. reset spring; 17. conical cylinder; 18. pushing rod; 19. limiting ball; 20. sealing ring; 21. docking cylinder; 22. engaging groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1: This embodiment Figure 1-Figure 4 As shown, in order to solve the problem that the gap between the mechanism is directly exposed and easily affects the waterproof and dustproof effect, the working process of the internal isolation structure of the waterproof and dustproof mechanism at the rear end of the spindle is disclosed, so that the mechanism can effectively ensure the waterproof and dustproof effect. The specific contents are as follows:

[0032] The rotor 1 and the outer side of the upper end of the rotor 1 are sleeved with a rear cover 3;

[0033] The outer side of the lower end of the rotor 1 is sleeved with an abutment ring 4 and a bearing 5, and the abutment ring 4 is located at the upper end of the bearing 5. The outer sides of the abutment ring 4 and the bearing 5 are sleeved with a water jacket 2, and the water jacket 2 is located at the lower end of the rear cover 3.

[0034] An isolation structure is provided between the water jacket 2 and the back cover 3, and the isolation structure can achieve efficient dustproof and waterproof effects of the mechanism through the snap-fit ​​principle;

[0035] A fixing tube 14 and a docking tube 21 are provided inside the isolation structure. The fixing tube 14 is fixedly mounted on the outside of the rear cover 3, and the docking tube 21 is fixedly mounted on the upper end of the water jacket 2, and the water jacket 2 is located between the rear cover 3 and the fixing tube 14;

[0036] A moving groove 15 is provided inside the fixed cylinder 14, and a conical cylinder 17 is slidably mounted on the lower end of the moving groove 15, and a conical cylinder 17 is fixedly mounted on the upper end of the conical cylinder 17, and a push rod 18 is mounted at an equal angle on the outer side of the conical cylinder 17;

[0037] A limiting ball 19 is nested inside the moving groove 15, a sealing ring 20 is nested inside the fixed tube 14 on the side close to the rear cover 3, and a snap-fit ​​groove 22 is opened at an equal angle on the outside of the docking tube 21, and the snap-fit ​​groove 22 is snap-fitted with the limiting ball 19.

[0038] When using the waterproof and dustproof mechanism at the rear end of the spindle, first install the waterproof and dustproof mechanism at the rear end of the spindle. After the mechanism is installed, the rear end of the spindle can be protected by the mechanism. During the installation of the mechanism, the conical tube 17 is first pushed upward inside the motion groove 15 by the push rod 18. During the upward movement, the conical tube 17 squeezes the return spring 16 and causes the return spring 16 to contract. Then, the docking tube 21 can be inserted between the fixed tube 14 and the rear cover 3. During the movement of the docking tube 21, it contacts with the limiting ball 19 and squeezes the limiting ball 19. After being squeezed, the limiting ball 19 moves toward the inside of the motion groove 15. After the docking tube 21 stops moving, the docking tube 21 will squeeze the sealing ring 20 and cause the sealing ring 20 to deform, thereby filling the gap between the fixed tube 14 and the docking tube 21, and then the push rod 18 can be released. At this time, the contracted return spring 16 will expand and push the conical tube 17 to move to the initial position. During the movement of the conical tube 17, the limiting ball 19 will be squeezed and the limiting ball 19 will move to the initial position. At this time, the side of the limiting ball 19 close to the docking tube 21 will be located inside the engaging groove 22, thereby limiting the docking tube 21 at this position. The sealing between the fixed tube 14 and the docking tube 21 effectively ensures the waterproof and dustproof effect of the mechanism.

[0039] Embodiment 2: This embodiment is as follows Figure 1 and Figure 5-Figure 6 As shown, in order to solve the problem of limited sealing effect inside the mechanism, the working process of the internal sealing structure of the waterproof and dustproof mechanism at the rear end of the spindle is disclosed, and the sealing structure can achieve the effect of stable sealing. The specific contents are as follows:

[0040] A sealing structure is provided between the water jacket 2 and the rear cover 3, and the sealing structure can improve the dustproof and waterproof effect of the mechanism;

[0041] A main sealing ring 6 and a secondary sealing ring 7 are nested and installed on the outer side of the water jacket 2, and the volume of the main sealing ring 6 is larger than that of the secondary sealing ring 7, and the main sealing ring 6 is located at the upper end of the water jacket 2, while the secondary sealing ring 7 is located on the side of the water jacket 2;

[0042] Connecting pipes 8 are fixedly installed on the outer sides of the primary sealing ring 6 and the secondary sealing ring 7 , and mounting cavities 9 are fixedly installed on the ends of the two sets of connecting pipes 8 away from the primary sealing ring 6 and the secondary sealing ring 7 .

[0043] When the waterproof and dustproof mechanism at the rear end of the main shaft is used, the water jacket 2 and the back cover 3 can be sealed by the deformation between the main sealing ring 6 and the secondary sealing ring 7. During this process, the main sealing ring 6 will be squeezed by the water jacket 2 and the back cover 3, and the main sealing ring 6 will be deformed by the squeezing and fill the space between the water jacket 2 and the back cover 3. During this process, the air pressure inside the main sealing ring 6 will be greater than the air pressure inside the secondary sealing ring 7. Then the main sealing ring 6 will transport the gas inside it to the inside of the secondary sealing ring 7 through the connecting pipe 8, and the secondary sealing ring 7 will expand and become larger and fill the gap between the water jacket 2 and the back cover 3 again. The deformation of the main sealing ring 6 and the secondary sealing ring 7 can further improve the waterproof and dustproof effect of the mechanism.

[0044] Embodiment 3: This embodiment is as follows Figure 5-Figure 6 As shown, in order to solve the problem of accidental damage of the main sealing ring 6 during the operation of the mechanism, the movement process of the waterproof and dustproof mechanism seal 13 at the rear end of the main shaft is disclosed, so that the mechanism can achieve the effect of stable sealing. The specific contents are as follows:

[0045] A fixed block 10 is fixedly installed inside the installation cavity 9, and a sliding rod 11 is slidably installed inside the fixed block 10, and a support spring 12 is sleeved on the outer side of the sliding rod 11, and a seal 13 is fixedly installed on the end of the sliding rod 11 away from the fixed block 10, and the support spring 12 is located between the fixed block 10 and the seal 13.

[0046] When the waterproof and dustproof mechanism at the rear end of the main shaft is used, the gas inside the main sealing ring 6 will enter the interior of the secondary sealing ring 7 through the installation cavity 9. During this process, the seal 13 will squeeze the support spring 12 and cause the support spring 12 to shrink, and the seal 13 will cause the sliding rod 11 to slide inside the fixed block 10. When the internal air pressure of the main sealing ring 6 and the secondary sealing ring 7 is the same, the contracted support spring 12 will expand and push the seal 13 to re-seal with the installation cavity 9, thereby blocking the transmission of the internal air pressure of the main sealing ring 6 and the secondary sealing ring 7. The secondary sealing ring 7 is located on the outside of the mechanism. When the secondary sealing ring 7 is accidentally damaged, the installation cavity 9 will always be sealed with the seal 13, thereby ensuring that the main sealing ring 6 can continue to perform sealing work, achieving the effect of waterproof and dustproof, improving the working stability of the mechanism, and increasing the overall practicality.

[0047] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof and dustproof mechanism for the rear end of a main shaft, comprising a rotor (1) and a rear cover (3) sleeved on the outer side of the upper end of the rotor (1); Features: The invention also comprises: an abutment ring (4) and a bearing (5) are sleeved on the outer side of the lower end of the rotor (1), and the abutment ring (4) is located at the upper end of the bearing (5); a water jacket (2) is sleeved on the outer side of the abutment ring (4) and the bearing (5), and the water jacket (2) is located at the lower end of the rear cover (3); An isolation structure is provided between the water jacket (2) and the rear cover (3), and the isolation structure can achieve a highly efficient dustproof and waterproof effect of the mechanism through the snap-fit ​​principle.

2. A waterproof and dustproof mechanism for the rear end of the spindle according to claim 1, characterized in that: A fixing cylinder (14) and a docking cylinder (21) are provided inside the isolation structure; the fixing cylinder (14) is fixedly mounted on the outside of the rear cover (3); the docking cylinder (21) is fixedly mounted on the upper end of the water jacket (2); and the water jacket (2) is located between the rear cover (3) and the fixing cylinder (14).

3. A waterproof and dustproof mechanism for the rear end of the spindle according to claim 2, characterized in that: A moving groove (15) is provided inside the fixed cylinder (14), and a conical cylinder (17) is slidably mounted on the lower end of the moving groove (15), and a conical cylinder (17) is fixedly mounted on the upper end of the conical cylinder (17), and a push rod (18) is mounted at an equal angle on the outer side of the conical cylinder (17).

4. A waterproof and dustproof mechanism for the rear end of the spindle according to claim 3, characterized in that: A limiting ball (19) is nested and installed inside the movement groove (15), a sealing ring (20) is nested and installed inside a side of the fixed tube (14) close to the rear cover (3), and a snap-fit ​​groove (22) is formed at an equal angle on the outside of the docking tube (21), and the snap-fit ​​groove (22) is snap-fitted and connected to the limiting ball (19).

5. The waterproof and dustproof mechanism at the rear end of the spindle according to claim 1, characterized in that: A sealing structure is provided between the water jacket (2) and the rear cover (3), and the sealing structure can improve the dustproof and waterproof effects of the mechanism; A main sealing ring (6) and a secondary sealing ring (7) are nested and installed on the outer side of the water jacket (2); the volume of the main sealing ring (6) is larger than the volume of the secondary sealing ring (7); the main sealing ring (6) is located at the upper end of the water jacket (2), and the secondary sealing ring (7) is located at the side of the water jacket (2).

6. A waterproof and dustproof mechanism for the rear end of the spindle according to claim 5, characterized in that: Connecting pipes (8) are fixedly mounted on the outer sides of the primary sealing ring (6) and the secondary sealing ring (7), and mounting cavities (9) are fixedly mounted on the ends of the two sets of connecting pipes (8) away from the primary sealing ring (6) and the secondary sealing ring (7).

7. A waterproof and dustproof mechanism for the rear end of the spindle according to claim 6, characterized in that: A fixed block (10) is fixedly installed inside the installation cavity (9), and a sliding rod (11) is slidably installed inside the fixed block (10), and a support spring (12) is sleeved on the outer side of the sliding rod (11), and a sealing member (13) is fixedly installed on one end of the sliding rod (11) away from the fixed block (10), and the support spring (12) is located between the fixed block (10) and the sealing member (13).

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