Polyurethane injection dustproof ring with positioning structure

Abstract

The utility model relates to the technical field of dustproof rings, and discloses a polyurethane injection dustproof ring with a positioning structure, which comprises a dustproof ring main body, the dustproof ring main body comprises an embedding ring and a blocking ring, the embedding ring is in a circular ring shape, the blocking ring is coaxially fixed on the top end of the embedding ring, the blocking ring is in a bowl shape, and the blocking ring is arranged on the embedding ring in a back-off posture; a plurality of positioning plugs are fixedly arranged at the bottom end of the embedded ring in the circumferential direction, and the positioning plugs are used for positioning the embedded ring; a dustproof ring is coaxially fixed to the inner wall of the embedded ring and used for further preventing dust from entering. According to the dustproof ring, on one hand, the L-shaped positioning plugs are arranged on the lower portion of the dustproof ring body, so that the dustproof ring is not prone to loosening in the later period; and on the other hand, the dustproof ring is coaxially fixed in the dustproof ring main body, the annular sealing wool top on the dustproof ring is matched with the blocking ring on the embedded ring, and the annular sealing wool top on the dustproof ring and the blocking ring on the embedded ring jointly prevent external dust from entering, so that a better dustproof effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust-proof rings, and more specifically, to a polyurethane injection dust-proof ring with a positioning structure. Background Art

[0002] A layer of oil film adheres to the surface of the piston rod of the oil cylinder. The places where the oil cylinder is used generally always have dust or sand grains, etc. These dust, sand grains, etc. adhere to the oil film on the surface of the piston rod and will be brought into the oil cylinder, scratching the lip of the lip seal on the piston rod or scratching the surface of the piston rod, which will cause medium leakage. Therefore, it is necessary to set a dust-proof ring outside the piston rod seal and close to the cylinder barrel end face. The dust-proof ring is installed in the groove. Since there is a certain interference between the lip of the dust-proof ring and the piston rod, the lip of the dust-proof ring closely adheres to the surface of the piston rod. When the piston rod reciprocates, the dust, sand grains, etc. adhering to the surface of the piston rod are removed by the dust-proof ring. There is a certain gap between the right section of the lip of the dust-proof ring and the piston rod, which can reduce the frictional resistance between the lip of the dust-proof ring and the piston rod. A type of existing dust-proof ring is processed by polyurethane injection molding. When this type of polyurethane injection dust-proof ring is used, after it is installed in the installation groove of the equipment, during the long-term use process, it is easy to loosen and displace due to the vibration of the equipment, resulting in a decrease in its sealing effect. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a polyurethane injection dust-proof ring with a positioning structure to solve the problems raised in the above background art.

[0004] To achieve the above object, the utility model provides the following technical solution: Design a polyurethane injection dust-proof ring with a positioning structure, including a dust-proof ring main body. The dust-proof ring main body includes an embedding ring and a blocking ring. The embedding ring is in a circular ring shape. A blocking ring is coaxially fixed on the top end of the embedding ring. The blocking ring is in a bowl shape and is arranged on the embedding ring in an inverted buckled posture. A plurality of positioning plugs are fixedly arranged along the circumference at the bottom end of the embedding ring. The positioning plugs are used to position the embedding ring. A dust-proof ring is coaxially fixed on the inner wall of the embedding ring. The dust-proof ring is used to further block the entry of dust.

[0005] As a preferred technical solution of the utility model, the positioning plug includes a rod body and a head. One end of the rod body is fixed on the bottom end of the embedding ring. The other end of the rod body is fixed with a head. The rod body and the head are arranged in an L shape. Both the rod body and the head are in an arc shape.

[0006] As a preferred technical solution of the present utility model, it is characterized in that the dust-proof ring includes a ring body, a sealing wool strip, and a connecting mechanism. The ring body is detachably connected to the inner wall of the embedding ring through the connecting mechanism. A sealing wool strip is coaxially fixed on the inner wall of the ring body, and the sealing wool strip is in a circular ring shape.

[0007] As a preferred technical solution of the present utility model, it is characterized in that the connecting mechanism includes a plurality of limit keys and a plurality of limit slots. The plurality of limit keys are circumferentially fixed on the inner wall of the embedding ring, and the plurality of limit slots are circumferentially formed on the outer wall of the ring body. The limit keys and the limit slots are arranged in one-to-one correspondence so that the limit keys are inserted into the corresponding limit slots.

[0008] As a preferred technical solution of the present utility model, it is characterized in that an annular groove is coaxially formed on the inner wall of the ring body, the sealing wool strip is embedded in the annular groove, and the sealing wool strip and the annular groove are fixed by an adhesive.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] On the one hand, by providing a plurality of L-shaped positioning plugs at the lower part of the dust-proof ring main body and cooperating with the positioning slots opened in the installation position of the equipment, the positioning of the dust-proof ring can be quickly realized, so that the dust-proof ring is not easy to loosen later; on the other hand, by coaxially fixing a dust-proof ring in the dust-proof ring main body and using the annular sealing wool strip on the dust-proof ring and the blocking ring on the embedding ring to cooperate, the two jointly prevent the entry of external dust, thereby obtaining a better dust-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. 1 is a schematic structural diagram of a polyurethane injection dust-proof ring with a positioning structure proposed by the present invention;

[0012] Figure 2 FIG. 2 is a schematic cross-sectional structural diagram of a polyurethane injection dust-proof ring with a positioning structure proposed by the present invention;

[0013] Figure 3 FIG. 3 is a schematic exploded structural diagram of a polyurethane injection dust-proof ring with a positioning structure proposed by the present invention;

[0014] Figure 4 FIG. 4 is a schematic structural diagram of a sealing wool strip fixing structure of a polyurethane injection dust-proof ring with a positioning structure proposed by the present invention;

[0015] Figure 5 FIG. 5 is a schematic installation diagram of a positioning plug of a polyurethane injection dust-proof ring with a positioning structure proposed by the present invention.

[0016] In the figure: 1. Dust-proof ring main body; 101. Embedded ring; 102. Blocking ring; 2. Positioning plug; 201. Rod body; 202. Head; 3. Dust-proof ring; 301. Ring body; 302. Sealing wool strip; 303. Limit groove; 3031. First groove body; 3032. Second groove body; 304. Limit key; 3041. First protrusion; 3042. Second protrusion; 4. Equipment; 5. Positioning slot. Detailed implementation mode

[0017] 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.

[0018] As Figures 1 to 5 shown, the present invention provides an embodiment 1: A polyurethane injection dust-proof ring with a positioning structure, including a dust-proof ring main body 1. The dust-proof ring main body 1 includes an embedded ring 101 and a blocking ring 102. The embedded ring 101 is circular, and a blocking ring 102 is coaxially fixed on the top end of the embedded ring 101. The blocking ring 102 is bowl-shaped, and the blocking ring 102 is arranged in an inverted state on the embedded ring 101; a plurality of positioning plugs 2 are fixedly arranged along the circumference at the bottom end of the embedded ring 101, and the positioning plugs 2 are used to position the embedded ring 101; a dust-proof ring 3 is coaxially fixed on the inner wall of the embedded ring 101, and the dust-proof ring 3 is used to further block the entry of dust.

[0019] The positioning plug 2 includes a rod body 201 and a head 202. One end of the rod body 201 is fixed on the bottom end of the embedded ring 101, and the other end of the rod body 201 is fixed with a head 202. The rod body 201 and the head 202 are arranged in an L shape, and both the rod body 201 and the head 202 are arc-shaped. When in use, a plurality of positioning slots corresponding to the positioning plugs 2 one by one are opened in the installation slot of the equipment main body. The positioning slot is as shown in the attached Figure 5 figure, and the whole is in an L shape. After inserting the positioning plug 2 into the positioning slot 5 opened on the equipment 4, by rotating the embedded ring 101, the positioning plug 2 and the positioning slot 5 are locked together, so as to quickly realize the positioning of the dust-proof ring main body 1, making it not easy to loosen in the later stage.

[0020] The dust-proof ring 3 includes a ring body 301, a sealing wool strip 302, and a connecting mechanism. The ring body 301 is detachably connected to the inner wall of the embedded ring through the connecting mechanism. A sealing wool strip 302 is coaxially fixed on the inner wall of the ring body 301, and the sealing wool strip 302 is circular.

[0021] The connecting mechanism includes several limiting keys 304 and several limiting grooves 303. The several limiting keys 304 are fixed on the inner wall of the embedding ring 101 along the circumferential direction, and the several limiting grooves 303 are arranged on the outer wall of the ring body 301 along the circumferential direction. The limiting keys 304 and the limiting grooves 303 are arranged in one-to-one correspondence so that the limiting keys 304 are inserted into the corresponding limiting grooves 303. The limiting key 304 includes a first protrusion 3041 and a second protrusion 3042. The first protrusion 3041 is in the shape of an isosceles trapezoid, and the second protrusion 3042 is in a strip shape. The width of the second protrusion 3042 is smaller than the width of the first protrusion 3041, and the first protrusion 3041 and the second protrusion 3042 are fixedly connected. The limiting groove 303 includes a first groove body 3031 and a second groove body 3032. The first groove body 3031 is in the shape of an isosceles trapezoid, and the second groove body 3032 is in a strip shape. The first groove body 3031 corresponds to the first protrusion 3041, and the second groove body 3032 corresponds to the second protrusion 3042. The ring body 301 is made of a flexible material, so it can be deformed, and thus the limiting key 304 can be inserted into the limiting groove 303. The first protrusion 3041 on the limiting key 304 is used to clamp the entire ring body 301 on the inner wall of the embedding ring 101, thereby realizing the rapid fixation of the ring body 301.

[0022] An annular groove is coaxially formed on the inner wall of the ring body 301, and the sealing strip 302 is embedded in the annular groove. The sealing strip 302 and the annular groove are fixed by an adhesive. The sealing strip 302 is made of a high-quality random polypropylene as the base plate, synthesized with silicated polypropylene filaments and polypropylene films. This sealing strip 302 adopts a silicated plus sheet type sealing strip. The silicated plus sheet type sealing strip adds a layer of plastic film in the hair body, completely isolating the flow of dust and air, improving the sealing performance by more than five times, reducing friction and increasing durability. The hair density of 1250 roots per square centimeter ensures excellent sealing performance. The design of the silicated polypropylene filaments and the central film completely achieves the waterproof and sealing performance. The unique design of the bottom plate wing strengthens the role of the supporting hair, making the hair not easy to fall sideways. The hair is treated with silicone oil and has functions such as elasticity, water repellency, anti-aging, and strong anti-wear.

[0023] When the utility model is in use, on the one hand, by arranging several L-shaped positioning plugs 2 at the lower part of the dust-proof ring main body 1 and cooperating with the positioning slots 5 opened in the installation position of the device 4, the positioning of the dust-proof ring can be quickly realized, so that the dust-proof ring is not easy to loosen in the later stage; on the other hand, by coaxially fixing a dust-proof ring 3 in the dust-proof ring main body 1 and cooperating with the annular sealing strip 302 on the dust-proof ring 3 and the blocking ring 102 on the embedding ring, the two jointly prevent the entry of external dust, thereby obtaining a better dust-proof effect.

[0024] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyurethane injection dust seal with a positioning structure, comprising a dust seal body (1), characterized in that: The dustproof ring body (1) comprises an embedded ring (101) and a blocking ring (102); the embedded ring (101) is in the shape of a circular ring; a blocking ring (102) is coaxially fixed on the top of the embedded ring (101); the blocking ring (102) is in the shape of a bowl, and the blocking ring (102) is arranged on the embedded ring (101) in an inverted posture; a plurality of positioning plugs (2) are fixedly provided at the bottom end of the embedded ring (101) along the circumferential direction; the positioning plugs (2) are used to position the embedded ring (101); a dustproof ring (3) is coaxially fixed on the inner wall of the embedded ring (101); the dustproof ring (3) is used to further block the entry of dust.

2. The polyurethane injection dust seal with a positioning structure according to claim 1 is characterized in that: The positioning plug (2) comprises a rod body (201) and a head (202); one end of the rod body (201) is fixed to the bottom end of the embedding ring (101); the other end of the rod body (201) is fixed to the head (202); the rod body (201) and the head (202) are arranged in an L shape; and both the rod body (201) and the head (202) are in an arc shape.

3. The polyurethane injection dust seal with a positioning structure according to claim 1, characterized in that: The dustproof ring (3) comprises a ring body (301), a sealing strip (302) and a connecting mechanism. The ring body (301) is detachably connected to the inner wall of the embedded ring (101) via the connecting mechanism. The sealing strip (302) is coaxially fixed to the inner wall of the ring body (301). The sealing strip (302) is in the shape of a circular ring.

4. The polyurethane injection dust seal with a positioning structure according to claim 3 is characterized in that: The connection mechanism comprises a plurality of limit keys (304) and a plurality of limit grooves (303); the plurality of limit keys (304) are fixed on the inner wall of the embedded ring (101) along the circumferential direction; the plurality of limit grooves (303) are opened on the outer wall of the ring body (301) along the circumferential direction; the limit keys (304) and the limit grooves (303) are arranged in a one-to-one correspondence so that the limit keys (304) can be inserted into the corresponding limit grooves (303).

5. The polyurethane injection dust seal with a positioning structure according to claim 3, characterized in that: An annular groove is coaxially formed on the inner wall of the ring body (301), the sealing strip (302) is embedded in the annular groove, and the sealing strip (302) and the annular groove are fixed by an adhesive.

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