Lead screw spacer bush

Abstract

The utility model discloses a lead screw spacer bush which comprises two end sleeves, and the two end sleeves are communicated in a sliding and sealing mode through a sealing telescopic connecting mechanism and used for installing and isolating lead screws of different lengths in a penetrating mode. A lead screw sealing ring and a dustproof lip are arranged in the end sleeve, and a lead screw limiting mechanism is arranged on the outer side of the end sleeve in a sleeving mode and used for abutting against and being fixed to a penetrating lead screw. And by arranging the sealing telescopic connecting mechanism, the distance between the two end sleeves can be adjusted, so that the device is more suitable for matching, penetrating and isolating lead screws with different lengths, and the application range is effectively expanded. By arranging a sealing ring and a dustproof lip, the sealing ring can isolate the penetrating part of the screw rod from the outside after the screw rod penetrates, so that the influence of factors such as outside air on the screw rod is reduced, and the service life of the screw rod is prolonged; the dustproof lips can prevent external dust and other impurities from entering the end sleeve, and can ensure that the end opening is closed no matter whether the lead screw penetrates into the end sleeve or not, so that the internal cleanliness is greatly ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screw rod spacer, especially a screw rod spacer. BACKGROUND

[0002] Screw rod is an ideal product that converts rotary motion into linear motion or linear motion into rotary motion. It is the most commonly used transmission element in tooling machinery and precision machinery, and its main function is to convert rotary motion into linear motion or torque into axial repeated force. Because of its very small frictional resistance, screw rod is widely used in various industrial equipment and precision instruments.

[0003] However, when the screw rod is stored, it is easy to be corroded by external factors, causing rust and other problems, affecting precision, and thus cannot be used. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problem that the screw rod is easy to be corroded by external factors, and provides a screw rod spacer.

[0005] To solve the above technical problems, the utility model adopts the technical scheme that

[0006] The utility model provides a screw rod spacer, including end sleeve, two end sleeves are provided, two end sleeves are slidably connected through sealing telescopic connecting mechanism, and the different lengths of screw rods are worn and assembled; the end sleeve is equipped with screw rod sealing ring and dust lip, the outer side of the end sleeve is equipped with screw rod limiting mechanism, and is used for tightly fixed on the worn screw rod.

[0007] Further, the two end sleeves are a first end sleeve and a second end sleeve respectively, the sealing telescopic connecting mechanism includes

[0008] The first sleeve is fixedly connected on the first end sleeve;

[0009] The second sleeve is fixedly connected on the second end sleeve, the first sleeve is slidably connected in the second sleeve, and is sealingly and slidably connected through the sliding sealing ring; the second end sleeve is screwedly provided with the abutting bolt, and is used for relatively fixing the first sleeve and the second end sleeve.

[0010] Further, the screw rod limiting mechanism includes

[0011] The abutting sleeve is screwedly connected on the outer side of the end sleeve, and the other end of the inner side wall of the abutting sleeve is provided with an inclined surface;

[0012] A sliding rod is arranged through the end sleeve, a spring is arranged on the sliding rod outside the end sleeve, one end of the spring is fixedly connected with the outer wall of the end sleeve, and the other end of the spring is fixedly connected with the sliding rod, and the sliding rod abuts against the inclined surface.

[0013] Further, the end of the abutting sleeve can be open or closed.

[0014] Further, the dustproof lip is composed of two symmetrical lip-shaped protrusions, and the dustproof lip is made of rubber.

[0015] The utility model discloses the beneficial effects are:

[0016] 1. By setting up sealing telescopic connecting mechanism, the interval between two end sleeves is adjustable, and then more suitable for matching and wearing the lead screw of different length, effectively expands the scope of application.

[0017] 2. By setting up sealing ring and dustproof lip, the sealing ring can make the lead screw after wearing the wearing part and the outside separate, reduce the influence of external air and other factors, prolong its service life, and the dustproof lip can prevent the dust and impurities in the outside from entering the inside of the end sleeve, and whether the lead screw is worn or not, it can guarantee the closure of the end port, and greatly ensure the cleanliness of the inside.

[0018] 3. By setting up the lead screw limiting mechanism, the position of the design on the lead screw can be fixed, the sliding is prevented, and then the use effect is ensured, the lead screw after isolation can be prevented from shaking in the design, and then the knocking is caused, and the use accuracy is influenced. DRAWINGS

[0019] Figure 1 The utility model provides a structure schematic view of lead screw isolation sleeve;

[0020] Figure 2 The utility model discloses an explosion drawing; Figure 1

[0021] Figure 3 The utility model discloses the section view of abutting sleeve in the utility model;

[0022] Figure 4 The utility model provides a structure schematic view of second end sleeve in the utility model;

[0023] Figure 5 The utility model discloses a front view; Figure 4

[0024] Figure 6 The utility model discloses the structure schematic view when adopting closed abutting sleeve in embodiment 2.

[0025] ​​In the figure, 1, end sleeve; 11, first end sleeve; 12, second end sleeve; 2, sealing telescopic connecting mechanism; 21, first sleeve; 211, sliding sealing ring; 212, sealing ring mounting groove; 22, second sleeve; 23, abutting bolt; 231, first abutting pad; 3, screw rod limiting mechanism; 31, abutting sleeve; 311, inclined surface; 32, sliding rod; 321, second abutting pad; 322, spring; 323, round head; 4, screw rod sealing ring; 5, dustproof lip. DETAILED DESCRIPTION

[0026] The implementation modes of the present application are described below through specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification. The present application can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in the present specification based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0027] It should be noted that the diagrams provided in the following examples only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components when actually implemented. The shapes, number and proportions of the components when actually implemented can be arbitrarily changed, and the layout pattern of the components can also be more complex.

[0028] Example 1

[0029] As shown in Figures 1 to 5

[0030] A screw rod spacer sleeve, comprising a first end sleeve 11, specifically, the first end sleeve 11 is in a tubular structure with front and back communication. In order to isolate the inside of the first end sleeve 11 from the outside and ensure the cleanliness inside, a screw rod sealing ring 4 and a dustproof lip 5 made of two pieces of lip-shaped protrusions and made of rubber are arranged on the inner side of the front end of the first end sleeve 11. The relative front and back positions of the sealing ring 4 and the dustproof lip 5 are not limited, that is, in order to make the dustproof effect more obvious and reduce the influence of dust on the sealing ring 4, the dustproof lip 5 can also be arranged on the front side of the sealing ring 4. Further, in order to form a complete spacer sleeve structure, the rear end of the first end sleeve 11 is also axially symmetrically provided with a second end sleeve 12 with the same structure. Further, in order to form a complete and sealable sliding telescopic spacer sleeve structure, the first end sleeve 11 and the second end sleeve 12 are connected through a sealing telescopic connecting mechanism 2.

[0031] ​Through the scheme, the distance between the two end sleeves is adjustable, thereby being more suitable for matching the threaded rods with different lengths, and the application range is effectively expanded.

[0032] Specifically, the sealing telescopic connecting mechanism 2 comprises a first sleeve 21 fixedly connected to the first end sleeve 11 and a second sleeve 22 fixedly connected to the second end sleeve 12, the first sleeve 21 is sleeved in the second sleeve 22 and sealingly slides with the sliding sealing ring 211, further, in order to stably install the sliding sealing ring 211 and ensure the sealing effect, the rear end of the first sleeve 21 is annularly provided with a sealing ring installation groove 212, and two sliding sealing rings 211 are installed in the corresponding sealing ring installation grooves 212; further, in order to relatively fix the first sleeve 21 and the second sleeve 22, the second sleeve 22 is threadedly provided with the abutting bolt 23, and preferably, in order to increase the friction, the abutting end of the abutting bolt 23 located on the inner side of the second sleeve 22 is provided with the first abutting pad 231 made of rubber.

[0033] In order to fix the design on the threaded rod or fix the threaded rod inserted into the design, the front end of the first end sleeve 11 and the rear end of the second end sleeve 12 are both provided with the threaded rod limiting mechanism 3; specifically, the threaded rod limiting mechanism 3 comprises the abutting sleeve 31 provided in an open type, the front end of the inner side wall of the abutting sleeve 31 is threadedly sleeved on the outer side of the front end of the first end sleeve 11, the rear end of the inner side wall of the abutting sleeve 31 is provided with the inclined surface 311, and the inclined surface 311 forms the cavity in the shape of a circular truncated cone with the front small and the rear large; in addition, the threaded rod limiting mechanism 3 further comprises the slide rod 32 penetratingly provided on the first end sleeve 11 and located behind the abutting sleeve 31, and preferably, in order to use more stably, the slide rod 32 is provided as four and arranged in a circumferential array; the slide rod 32 located on the outer side of the first end sleeve 11 is both provided with the spring 322, one end of the spring 322 is fixedly connected with the outer side wall of the first end sleeve 11, the other end of the spring 322 is fixedly connected with the slide rod 32, and further, in order to ensure smooth abutment, the outer end of the slide rod 32 is further abutted on the inclined surface 311 through the round head 323 in a circular shape; in order to prevent the threaded rod from being damaged by the abutment mode, the end of the slide rod 32 located on the inner side of the first end sleeve 11 is provided with the second abutting pad 321 made of rubber.

[0034] Preferably, in order to ensure the fixing effect of the two ends, the threaded rod limiting mechanism 3 located on the rear end of the second end sleeve 12 is the same in structure as the threaded rod limiting mechanism 3 located on the front end of the first end sleeve 11 and is oppositely arranged.

[0035] This solution not only ensures the design is fixed in position on the lead screw, preventing slippage and thus guaranteeing performance, but also prevents the lead screw from shaking inside the design after isolation, which could cause collisions and affect accuracy.

[0036] Example 2

[0037] like Figure 6 As shown, Embodiment 2 has the same structure as Embodiment 1, except that the clamping sleeve 31 adopts a closed design. This design allows the shorter lead screw to be completely fitted into the structure, and the clamping sleeve 31 acts as an end cap, further isolating the external environment from the interior of the sleeve, thereby further reducing the impact of external factors on the lead screw.

[0038] How this device works:

[0039] Before use, adjust the first sleeve 21 and the second sleeve 22 according to the length of the lead screw to be isolated so that there is space inside to accommodate the lead screw. After adjustment, tighten the clamping bolt 23. The clamping bolt 23 fixes the first sleeve 21 and the second sleeve 22 relative to each other by clamping.

[0040] In use, when it is necessary to separate the lead screw portion, an open-type clamping sleeve 31 is used. The lead screw is then inserted from the front end of the first end sleeve 11, passing through the lead screw sealing ring 4 and dust lip 5 on the first end sleeve 11 before entering the interior of the spacer. It then passes through the lead screw sealing ring 4 and dust lip 5 on the second end sleeve 12 and exits through the rear end of the second end sleeve 12. Under the action of the lead screw sealing ring 4 and dust lip 5, the lead screw located inside the spacer can be isolated from the outside. Then, the clamping sleeve 31 at the front end is inserted onto the front end of the lead screw through its open design and then screwed in from opposite directions. During the screwing-in process of the clamping sleeve 31, the first end sleeve 11 undergoes axial displacement. That is, after the round head 323 of the slide rod 32 abuts against the inclined surface 311 on the first end sleeve 11, it also undergoes axial displacement. Due to the abutment of the inclined surface, the four slide rods 32 are gradually retracted, and the spring 322 is compressed, which abuts and fixes the front end of the internal lead rod, thereby achieving the fixing function. The clamping sleeve 31 located at the rear end of the second end sleeve 12 is installed in the same way, which achieves the abutment and fixing function of the rear end of the internal lead rod. Thus, the isolation of the lead rod from the outside world is completed.

[0041] When it is necessary to completely isolate the entire lead screw, a closed clamping sleeve 31 is used, and then the lead screw is installed and fixed in the same way. Here, the closed clamping sleeve 31 not only realizes the function of pressing and fixing, but also realizes the function of end cap, isolating the entire lead screw from the outside world.

[0042] When the screw rod needs to be taken out, the reverse screwing out of the abutting sleeve 31 occurs, the abutting sleeve 31 moves reversely, the abutting force gradually decreases, and then the four slide rods 32 are gradually separated under the elastic force of the spring 322, thereby canceling the abutting fixation of the internal screw rod.

[0043] When the screw rod is taken out, the two dustproof lips 5 are elastically rebounded to each other under the action of the rubber elasticity, the inside of the design is separated from the outside, dust is prevented from entering, and the cleanliness of the inside when not in use is ensured.

[0044] The above-described embodiments only express the specific implementation manners of the present application, the description is relatively specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A lead screw spacer, characterized by: The utility model provides a telescopic sleeve for screw rod, which comprises end sleeves (1), the two end sleeves (1) are in sliding seal communication through a sealing telescopic connecting mechanism (2), and are used for wearing different length screw rods; the end sleeve (1) is internally provided with a screw rod sealing ring (4) and a dustproof lip (5), the end sleeve (1) is externally provided with a screw rod limiting mechanism (3) for abutting and fixing on the penetrated screw rod.

2. A lead screw spacer according to claim 1, wherein: The two end sleeves (1) are respectively a first end sleeve (11) and a second end sleeve (12), the sealing telescopic connecting mechanism (2) comprises a first sleeve (21) fixedly connected to the first end sleeve (11); a second sleeve (22) fixedly connected to the second end sleeve (12), the first sleeve (21) is slidingly sleeved in the second sleeve (22) and sealingly slidingly connected through a sliding sealing ring (211); the second end sleeve (12) is threadedly provided with an abutting bolt (23) for relatively fixing the first sleeve (21) and the second end sleeve (12).

3. The lead screw spacer of claim 1, wherein: The screw rod limiting mechanism (3) comprises an abutting sleeve (31), one end of the inner wall of the abutting sleeve (31) is threadedly sleeved on the outer side of the end sleeve (1), and the other end of the inner wall of the abutting sleeve (31) is provided with an inclined surface (311); a sliding rod (32) penetratingly provided on the end sleeve (1), the sliding rod (32) on the outer side of the end sleeve (1) is provided with a spring (322), one end of the spring (322) is fixedly connected to the outer wall of the end sleeve (1), and the other end of the spring (322) is fixedly connected to the sliding rod (32), and the sliding rod (32) abuts on the inclined surface (311).

4. A lead screw spacer according to claim 3, wherein: The end of the abutting sleeve (31) can be open or closed.

5. The lead screw spacer of claim 1, wherein: The dustproof lip (5) is composed of two symmetrical lip-shaped protrusions, and the dustproof lip (5) is made of rubber.

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