Bowl group with labyrinth seal structure

Abstract

The utility model discloses a labyrinth seal structure bowl group which comprises a bicycle head pipe, a front fork pipe penetrates into the middle of the bicycle head pipe, two ends of the bicycle head pipe fix the front fork pipe through an upper bowl group and a lower bowl group respectively, a sunflower group is installed in the front fork pipe, and the labyrinth seal structure bowl group comprises a top cover. The top cover screw penetrates into the top cover, is in threaded connection with the sunflower core below the top cover and is clamped in the front fork pipe, the top of the top cover is sealed through a rubber plug, the upper bowl set comprises a bowl cover, the bowl cover and an upper bowl below the bowl cover half wrap a pressing ring, an outer ring of an upper bearing abuts against the upper bowl, and an inner ring of the upper bearing abuts against the pressing ring. A labyrinth sealing structure is formed through fit clearances among the headstock pipe, the bowl cover and the upper bowl; the rotating gap reserved between the stator and the rotor in the headstock bowl assembly is designed to be in an upward multi-turning shape, rainwater and dust are prevented from entering the headstock bowl assembly, the performance of the bearing is protected, the service life of the bowl assembly is prolonged, the bowl cover completely wraps the outer ring of the upper bowl, exposed parts are reduced, and the appearance is more concise and attractive.

Description

Technical Field

[0001] The utility model relates to a bowl set with a labyrinth seal structure, in particular to a bowl set with a labyrinth seal structure. Background Art

[0002] The bicycle headset is mainly used to connect the front fork tube to the head tube of the frame, and to allow the front fork to rotate freely, so that the front wheel can turn. In order to achieve the rotation function, bearings are usually used in the headset structure. However, the current headset has poor sealing performance, which is easy to enter rainwater and dust, causing the bearings to rust and damage easily, reducing the service life. Utility Model Content

[0003] The utility model provides a bowl assembly with a labyrinth seal structure, which is used to overcome the defects of the prior art that the head bowl assembly has poor sealing performance, is easy to get rainwater and dust in, causes the bearing to be easily rusted and damaged, and reduces the service life.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] The utility model discloses a bowl assembly with a labyrinth seal structure, comprising a head tube, the middle part of the head tube penetrates into a front fork tube, and the two ends of the head tube respectively fix the front fork tube through an upper bowl assembly and a lower bowl assembly, a sunflower assembly is installed in the front fork tube, the sunflower assembly comprises a top cover, the top cover screw penetrates into the top cover and is threadedly connected with a sunflower core below the top cover and is clamped in the front fork tube, the top of the top cover is sealed by a rubber plug, the upper bowl assembly comprises a bowl cover, the bowl cover and the upper bowl below it half cover a tight ring, the outer ring of the upper bearing bears against the upper bowl, and the inner ring thereof bears against the tight ring, and a labyrinth seal structure is formed through the matching gap among the head tube, the bowl cover and the upper bowl to isolate the entry of rainwater and dust.

[0006] Furthermore, the lower bowl assembly includes a lower bowl, and the lower bowl is sleeved with a bottom stop below the lower bowl. The inner ring of the lower bearing bears against the bottom stop, and the outer ring of the lower bearing bears against the lower bowl.

[0007] Furthermore, a sealing ring is provided inside the bowl cover to prevent rainwater from penetrating into the bearing through the gap between the front fork tube and the bowl cover, and an inner groove is provided on the inner side of its edge.

[0008] Furthermore, a rubber ring is arranged on the outer circle of the upper bowl, the rubber ring protrudes from the outer circle of the upper bowl, and the inner groove of the bowl cover and the rubber ring form a concave gap; the labyrinth sealing structure is an upward multi-turn gap, and the multi-turn gap is formed by the horizontal gap between the upper end face of the head pipe and the lower end face of the bowl cover, the concave gap formed by the inner groove of the bowl cover and the rubber ring, and the horizontal gap between the inner end face of the bowl cover and the upper end face of the upper bowl.

[0009] Furthermore, the bottom stop is inserted into the lower end of the front fork tube, and the open groove B thereon allows it to expand and contract slightly, so that it can fully hold the front fork tube. The tightening ring is arranged on the upper bearing and the front fork tube, and the open groove A thereon allows it to expand and contract slightly, so that it can fully hold the front fork tube.

[0010] Furthermore, a rotation gap remains between the lower end surface of the bowl cover and the upper end surface of the head tube.

[0011] Furthermore, a stem is sleeved on the outer wall of the front fork tube, and the stem is located between the top cover and the bowl cover.

[0012] Furthermore, the front fork, bottom gear, inner ring of the lower bearing, inner ring of the upper bearing, tightening ring, bowl cover, stem, top cover, top cover screws and rubber plug are regarded as rotor parts; the head pipe, lower bowl, outer ring of the lower bearing, upper bowl and outer ring of the upper bearing are regarded as stator parts.

[0013] The beneficial effects achieved by the utility model are as follows: the rotation gap left between the stator and the rotor in the head bowl assembly is designed to be an upward multi-turn shape, forming a labyrinth sealing structure, which isolates the entry of rainwater and dust, protects the bearing performance, and extends the service life of the bowl assembly; the bowl cover completely wraps the outer ring of the upper bowl, reducing exposed parts, and the overall appearance is more simple and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural schematic diagram of the head bowl assembly of the utility model;

[0016] Figure 2 It is a plan view of the head headset of the utility model;

[0017] Figure 3 This utility model Figure 2 The enlarged schematic diagram of point A in the middle;

[0018] Figure 4 It is a schematic diagram of the installation of the front headset of the utility model.

[0019] In the figure: 1. Sunflower assembly; 1.1. Top cover; 1.2. Sunflower core; 1.3. Top cover screw; 1.5. Rubber plug; 2. Bowl cover; 2.1. Sealing ring; 2.2. Inner groove; 3. Tightening ring; 3.1. Opening groove A; 4. Upper bearing; 5. Upper bowl; 5.1. Rubber ring; 6. Lower bowl; 7. Lower bearing; 8. Bottom gear; 8.1. Opening groove B; 9. Head pipe; 10. Front fork pipe; 11. Stem. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] Example 1

[0022] like Figure 1-4 As shown, a labyrinth sealing structure headset comprises a head tube 9, the middle part of the head tube 9 penetrates into a front fork tube 10, and the two ends thereof respectively fix the front fork tube 10 through an upper headset assembly and a lower headset assembly, and a sunflower assembly 1 is installed in the front fork tube 10.

[0023] The sunflower set 1 includes a top cover 1.1, a top cover screw 1.3 penetrates into the top cover 1.1 and is threadedly connected to the sunflower core 1.2 below it, and is clamped in the front fork tube 10, and the top of the top cover 1.1 is sealed by a rubber plug 1.5.

[0024] The upper bowl assembly includes a bowl cover 2, and the bowl cover 2 and the upper bowl 5 thereunder half cover the tight ring 3. The outer ring of the upper bearing 4 bears against the upper bowl 5, and the inner ring thereof bears against the tight ring 3. A labyrinth sealing structure is formed through the matching gap among the head pipe 9, the bowl cover 2 and the upper bowl 5 to isolate the entry of rainwater and dust.

[0025] The lower bowl assembly comprises a lower bowl 6 , and the lower bowl 6 is sleeved with a bottom stop 8 thereunder. The inner ring of the lower bearing 7 bears against the bottom stop 8 , and the outer ring thereof bears against the lower bowl 6 .

[0026] A sealing ring 2.1 is arranged inside the bowl cover 2 to prevent rainwater from penetrating into the bearing from the gap between the front fork tube 10 and the bowl cover 2, and an inner groove 2.2 is provided on the inner side of its edge.

[0027] A rubber ring 5.1 is arranged on the outer circle of the upper bowl 5, and the rubber ring 5.1 protrudes from the outer circle of the upper bowl 5, and the inner groove 2.2 of the bowl cover 2 and the rubber ring 5.1 form a concave gap; the labyrinth sealing structure is an upward multi-turn gap, and the multi-turn gap is formed by the horizontal gap between the upper end face of the head pipe 9 and the lower end face of the bowl cover 2, the concave gap formed by the inner groove of the bowl cover 2 and the rubber ring 5.1, and the horizontal gap between the inner end face of the bowl cover 2 and the upper end face of the upper bowl 5.

[0028] The bottom stop 8 is inserted into the lower end of the front fork tube 10, and the opening groove B8.1 thereon allows it to expand and contract slightly, so that it can fully hold the front fork tube 10. The tight ring 3 is arranged on the upper bearing 4 and the front fork tube 10, and the opening groove A3.1 thereon allows it to expand and contract slightly, so that it can fully hold the front fork tube 10.

[0029] A rotation gap remains between the lower end surface of the bowl cover 2 and the upper end surface of the head pipe 9.

[0030] A stem 11 is sleeved on the outer wall of the front fork tube 10 , and the stem 11 is located between the top cover 1.1 and the bowl cover 2 .

[0031] In the structure of the head bowl assembly, the front fork 10, the bottom gear 8, the inner ring of the lower bearing 7, the inner ring of the upper bearing 4, the pressing ring 3, the bowl cover 2, the stem 11, the top cover 1.1, the top cover screw 1.1, and the rubber plug 1.5 are regarded as the rotor part, and the head pipe 9, the lower bowl 6, the outer ring of the lower bearing 7, the upper bowl 5, and the outer ring of the upper bearing 4 are regarded as the stator part.

[0032] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. The terms used in the description of this application are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0034] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

Claims

1. A labyrinth seal structure bowl set, characterized in that: It includes a head tube, the middle part of which penetrates into the front fork tube, and the two ends of which respectively fix the front fork tube through an upper bowl assembly and a lower bowl assembly, and a sunflower assembly is installed in the front fork tube; The sunflower assembly includes a top cover, the top cover screw penetrates into the top cover and is threadedly connected with the sunflower core below the top cover, and is clamped in the front fork tube, and the top of the top cover is sealed by a rubber plug; The upper bowl assembly includes a bowl cover, and the bowl cover and the upper bowl thereunder half cover a tight ring. The outer ring of the upper bearing bears against the upper bowl, and the inner ring thereof bears against the tight ring. A labyrinth sealing structure is formed through the matching gaps among the head pipe, the bowl cover and the upper bowl to isolate the entry of rainwater and dust.

2. The labyrinth seal structure bowl set according to claim 1, characterized in that: The lower bowl assembly comprises a lower bowl, and the lower bowl is sleeved with a bottom stop below the lower bowl. The inner ring of the lower bearing bears against the bottom stop, and the outer ring of the lower bearing bears against the lower bowl.

3. The labyrinth seal structure bowl set according to claim 1, characterized in that: A sealing ring is arranged inside the bowl cover to prevent rainwater from penetrating into the bearing from the gap between the front fork tube and the bowl cover, and an inner groove is arranged on the inner side of the edge of the sealing ring.

4. The labyrinth seal structure bowl set according to claim 1, characterized in that: A rubber ring is arranged on the outer circle of the upper bowl, the rubber ring protrudes from the outer circle of the upper bowl, and the inner groove of the bowl cover and the rubber ring form a concave gap; The labyrinth seal structure is an upward multi-turn gap, which is formed by the horizontal gap between the upper end face of the head pipe and the lower end face of the bowl cover, the concave gap formed by the groove in the bowl cover and the rubber ring, and the horizontal gap between the inner end face of the bowl cover and the upper end face of the upper bowl.

5. The labyrinth seal structure bowl set according to claim 2, characterized in that: The bottom stop is inserted into the lower end of the front fork tube, and the open groove B thereon allows it to expand and contract slightly, so that it can fully hold the front fork tube. The tightening ring is arranged on the upper bearing and the front fork tube, and the open groove A thereon allows it to expand and contract slightly, so that it can fully hold the front fork tube.

6. The labyrinth seal structure bowl set according to claim 1, characterized in that: A rotation gap remains between the lower end surface of the bowl cover and the upper end surface of the head pipe.

7. The labyrinth seal structure bowl assembly according to claim 5, characterized in that: The outer wall of the front fork tube is sleeved with a stem, and the stem is located between the top cover and the bowl cover.

8. The labyrinth seal structure bowl assembly according to claim 7, characterized in that: The front fork, bottom gear, inner ring of the lower bearing, inner ring of the upper bearing, pressing ring, bowl cover, stem, top cover, top cover screws and rubber plug are regarded as rotor parts; the head pipe, lower bowl, outer ring of the lower bearing, upper bowl and outer ring of the upper bearing are regarded as stator parts.

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