A stand assembly and bicycle

Abstract

The utility model belongs to bicycle technical field relates to a kind of stem assembly and bicycle, stem assembly includes integration cover and stem main body, stem main body includes first connecting end and second connecting end, integration cover covers and connects first connecting end;First connecting end is equipped with two clamping parts, two clamping parts are oppositely arranged to form first mounting hole, clearance is reserved between the free end of two clamping parts, two free ends are equipped with locking plane, bolt passes through two locking planes and is connected with nut;Its beneficial effect is, since using integration cover, and the free end of clamping part is equipped with locking plane, the thickness between the locking plane of two clamping parts can be thinner, so that the bolt connection of two clamping parts is more firm, solve the technical problem that bolt locking effect on stem is not strong when the stem of existing bicycle is relatively thick and heavy, cannot provide enough clamping force to clamp front fork steering tube.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to a stem assembly and a bicycle. Background Technology

[0002] As the bicycle industry continues to develop, bicycle design and manufacturing technologies are also constantly improving. However, existing bicycle handlebars have some problems in both design and practical application.

[0003] like Figure 1 As shown, the existing stem body 12 typically includes a first connecting end for connecting the bicycle fork steering tube 31 and a second connecting end for connecting the handlebars 2. The first connecting end usually has two clamping components, which are bolted together to clamp and fix the fork steering tube 31. When the bicycle head tube 4, fork, etc., are large, the clamping components are designed to be relatively thick and heavy to accommodate the large head tube. However, when the clamping components are relatively thick and heavy, the locking effect of the bolts is affected, resulting in insufficient clamping force. This may cause instability of the fork steering tube 31 during riding, affecting riding safety and comfort. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a stem assembly and a bicycle, which solves the technical problem that when the existing bicycle stem is relatively thick and heavy, the bolts do not have a strong locking effect on the stem and cannot provide sufficient clamping force to clamp the fork steering tube.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] In a first aspect, this utility model provides a stem assembly, including an integrated cover and a stem body. The stem body includes a first connecting end for connecting the steering tube of a bicycle fork and a second connecting end for connecting the handlebars. The integrated cover covers the top and side surfaces of the first connecting end and is connected to the first connecting end. The first connecting end is provided with two clamping parts, which are arranged opposite each other to form a first mounting hole that allows the steering tube of the fork to pass through. One end of the two clamping parts is connected as a whole and is connected to the second connecting end. A gap is reserved between the free ends of the two clamping parts. Both free ends are provided with locking planes, which are adjacent to the rear end faces of the free ends. A bolt passes through the locking planes of the two clamping parts and is connected to a nut to adjust the size of the gap to clamp and fix the steering tube of the fork.

[0009] Optionally, the integrated cover includes a U-shaped top plate and a U-shaped enclosure provided along the edge of the U-shaped top plate. The top surface and left and right sides of the first connecting end are provided with continuous steps. The integrated cover is placed on the steps, and the U-shaped top plate is spliced ​​together with the top surface of the stem body, and the U-shaped enclosure is spliced ​​together with the side of the stem body.

[0010] Optionally, the front end of the U-shaped top plate is provided with a mounting lug, through which bolts pass in sequence between the mounting lug and the stem body, and are connected together with a nut.

[0011] Optionally, the first connecting end is provided with two threaded locking holes, which pass through the free ends of the two clamping parts, with one threaded locking hole passing through from left to right and the other passing through from right to left.

[0012] Optionally, the second connecting end includes an upper arc-shaped part and a lower arc-shaped part disposed opposite to each other. The upper arc-shaped part and the lower arc-shaped part are connected together by bolts and form a second mounting hole for mounting the handlebar.

[0013] Optionally, the bottom surface of the second connecting end is provided with a clearance groove for avoiding the top of the bicycle's front fork body.

[0014] Secondly, this utility model embodiment provides a bicycle, including the aforementioned stem assembly, handlebars, fork steering tube, and head tube. The fork steering tube extends from the upper end of the head tube and rotates with the head tube. The first connecting end of the stem assembly is connected to the fork steering tube, and its second connecting end is connected to the handlebars.

[0015] (III) Beneficial Effects

[0016] The beneficial effects of this utility model are:

[0017] 1. The stem assembly and bicycle of this utility model adopt an integrated cover and a locking plane is provided at the free end of the clamping part of the first connecting end, so that the thickness between the locking planes of the two clamping parts is thinner, thereby making the bolt connection of the two clamping parts more reliable and stable. The clamping and locking effect of the stem assembly on the front fork steering tube is stronger. Compared with the prior art, it solves the technical problem that when the existing bicycle stem is relatively thick and heavy, the bolt locking effect on the stem is not strong and cannot provide sufficient clamping force to clamp the front fork steering tube.

[0018] 2. Using an integrated cover to cover the first connection end of the stem body can hide and protect the bolts and nuts on the clamping part of the first connection end from rainwater corrosion, and can make the stem assembly visually a whole, reducing the visual sense of fragmentation and making it more aesthetically pleasing. Attached Figure Description

[0019] Figure 1 To establish existing technology;

[0020] Figure 2 This is a three-dimensional schematic diagram of a handlebar assembly according to Embodiment 1 of the present invention;

[0021] Figure 3 This is one of the exploded schematic diagrams of the handlebar assembly in Embodiment 1 of the present invention, which is a stem assembly and a bicycle.

[0022] Figure 4 This is a second perspective view of the handlebar assembly of Embodiment 1 of the present invention, which is a stem assembly and a bicycle.

[0023] Figure 5 This is a second exploded view of the handlebar assembly of Embodiment 1 of the present invention, which is a stem assembly and a bicycle.

[0024] Figure 6 This is a schematic diagram of the assembly and use of the handlebar assembly of a bicycle according to Embodiment 1 of the present invention (the integrated cover is not shown).

[0025] [Explanation of Labels in the Attached Image]

[0026] 11. Integrated cover; 111. U-shaped top plate; 1110. Mounting lugs; 112. U-shaped enclosure;

[0027] 12. Establish the main body;

[0028] 121. Clamping part; 1210. Step; 1211. First mounting hole; 1212. Clearance; 1213. Threaded locking hole; 1214. Locking plane;

[0029] 1221. Upper arc-shaped part; 1222. Lower arc-shaped part; 1223. Second mounting hole; 1224. Clearance groove;

[0030] 2. Handlebars; 31. Steering tube for the front fork; 32. Front fork body; 4. Head tube; 5. Top tube; 6. Down tube. Detailed Implementation

[0031] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper" and "lower" are used interchangeably with... Figure 2 With the orientation as a reference, the end where the clamping part 121 is located is "rear", the end where the lower arc-shaped part 1222 is located is "front", the direction where the upper arc-shaped part 1221 is located is "up", and the side where the lower arc-shaped part 1222 is located is "down".

[0032] This utility model provides a stem assembly and a bicycle. The stem assembly includes an integrated cover and a stem body. The stem body includes a first connecting end for connecting to the steering tube of the bicycle's front fork and a second connecting end for connecting to the handlebars. The integrated cover covers the top and side surfaces of the first connecting end and is connected to it. The first connecting end has two clamping parts, which are arranged opposite each other to form a first mounting hole that allows the steering tube of the front fork to pass through. One end of the two clamping parts is connected as a single unit and is connected to the second connecting end. A gap is reserved between the free ends of the two clamping parts, and each free end has a locking plane. The locking plane is connected to the free end. The rear end faces of the two ends are adjacent, and the included angle between them is an obtuse angle. The bolt passes through the two locking planes and is connected to the nut to adjust the size of the gap to clamp and fix the front fork steering tube. Due to the use of an integrated cover and the locking plane at the free end of the clamping part of the first connecting end, the thickness of the bolt connection position of the two clamping parts is thinner, so that the bolt connection of the two clamping parts is more reliable and stable. The clamping and locking effect of the stem assembly on the front fork steering tube is stronger. Compared with the existing technology, it solves the technical problem that when the existing bicycle stem is relatively thick and heavy, the bolt locking effect on the stem is not strong and cannot provide enough clamping force to clamp the front fork steering tube.

[0033] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0034] Example 1:

[0035] Reference Figure 2 , Figure 3 and Figure 6 This embodiment 1 provides a stem assembly, including an integrated cover 11 and a stem body 12. The stem body 12 includes a first connecting end for connecting to the steering tube 31 of the bicycle fork and a second connecting end for connecting to the handlebar 2. The integrated cover 11 covers the top and side surfaces of the first connecting end and is connected to the first connecting end. The integrated cover 11 is used to cover the first connecting end and is integrated with the second connecting end, making the entire stem assembly appear as a single unit.

[0036] See Figure 3 and Figure 5The first connecting end has two clamping parts 121, which are arranged opposite each other to form a first mounting hole 1211 through which the fork steering tube 31 can pass. One end of the two clamping parts 121 is connected as a whole and connected to the second connecting end. A gap 1212 is reserved between the free ends of the two clamping parts 121. Both free ends are provided with locking planes 1214, which are adjacent to the rear end faces of the free ends, and the included angle between them is an obtuse angle. Bolts pass through the locking planes 1214 of the two clamping parts 121 and are connected to nuts. Therefore, the size of the gap 1212 can be adjusted by tightening the nuts to clamp and fix the fork steering tube 31.

[0037] In some feasible solutions, the angle between the locking plane 1214 and the rear end face of the free end is generally between 120° and 150°, which can be either 120° or 150°, depending on the actual needs.

[0038] See Figure 5 In some feasible solutions, the integrated cover 11 includes a U-shaped top plate 111 and a U-shaped enclosure 112 arranged along the edge of the U-shaped top plate. The top surface and left and right sides of the first connecting end are provided with continuous steps 1210. The integrated cover 11 is placed on the steps 1210, and the U-shaped top plate 111 is spliced ​​with the top surface of the stem body 12, and the U-shaped enclosure 112 is spliced ​​with the side of the stem body 12 and connected together by bolts. The arc-shaped area of ​​the U-shaped enclosure 112 is adapted to the arc-shaped front end of the upper tube 5.

[0039] See Figure 3 In practical applications, the front end of the U-shaped top plate 111 is provided with a mounting ear 1110. Bolts pass through the mounting ear 1110 and the stem body 12 in sequence and are connected together with nuts.

[0040] To enhance the locking effect on the two clamping parts 121, the first connecting end is provided with two threaded locking holes 1213. The threaded locking holes 1213 penetrate the locking planes 1214 of the free ends of the two clamping parts 121, with one threaded locking hole 1213 penetrating from left to right and the other from right to left. Therefore, one bolt locks the two clamping parts 121 from right to left, and the other bolt locks the two clamping parts 121 from left to right, thereby enhancing the clamping and fixing effect on the front fork steering tube 31.

[0041] See Figure 4 and Figure 5 In some feasible solutions, the bottom surface of the second connecting end is provided with a clearance groove 1224 for avoiding the top of the bicycle fork body 32.

[0042] See Figure 3 and Figure 5The second connecting end includes an upper arc-shaped part 1221 and a lower arc-shaped part 1222 that are arranged opposite to each other. The upper arc-shaped part 1221 and the lower arc-shaped part 1222 are connected together by bolts and form a second mounting hole 1223. The second mounting hole 1223 is used to install the handlebar 2.

[0043] In this embodiment, the stem assembly and the handlebar 2 are two independent components. In practical applications, the second connecting end of the stem assembly and the handlebar 2 can also be integrally molded.

[0044] It needs to be explained that, firstly, when the dimensions of the head tube 4 and the fork assembly are determined, the overall size of the stem assembly is fixed to match the head tube 4. Since this application includes an integrated cover 11, the size of the first connecting end of the stem body 12 can be made smaller without considering its aesthetic compatibility with the head tube 4. Therefore, the thickness between the locking planes 1214 of the two clamping parts 121 can be designed to be thinner, i.e., the length of the threaded locking hole 1213 is shorter, thereby increasing the locking effect of the bolt on the two clamping parts 121. Secondly, by setting the angle between the locking plane 1214 and the rear end face of the free end to an obtuse angle, it is equivalent to cutting off a corner of the clamping part 121, further reducing the thickness between the locking planes 1214 of the two clamping parts 121, further shortening the length of the threaded locking hole 1213, and further improving the locking effect of the bolt on the two clamping parts 121.

[0045] The screws used to lock the two clamping parts 121 are countersunk screws, and their size is adapted to the threaded locking hole 1213, which corresponds to the countersunk screw hole. Similarly, the screws used to connect the integrated cover 11 to the first connecting end are all countersunk screws.

[0046] Example 2:

[0047] Reference Figures 2 to 5 Based on Embodiment 1, Embodiment 2 provides a bicycle including a stem assembly, handlebars 2, a fork steering tube 31, and a head tube 4. The upper end of the fork body 32 is rotatably engaged with the front sidewall of the head tube 4. The fork steering tube 31 extends from the upper end of the head tube 4 and is rotatably engaged with it. The first connecting end of the stem assembly is connected to the fork steering tube 31, and its second connecting end is connected to the handlebars 2. The head tube 4 is the junction of the upper tube 5 and the lower tube 6. The fork steering tube 31 and the fork body 32 are connected together to form a single fork assembly.

[0048] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A stem assembly, characterized in that: It includes an integrated cover (11) and a stem body (12). The stem body (12) includes a first connecting end for connecting the bicycle's front fork steering tube (31) and a second connecting end for connecting the handlebars (2). The integrated cover (11) covers the top and side surfaces of the first connecting end and is connected to the first connecting end. The first connecting end is provided with two clamping parts (121), which are arranged opposite each other and form a first mounting hole (1211) through which the front fork steering tube (31) passes. One end of the two clamping parts (121) is connected as a whole and connected to the second connecting end. A gap (1212) is reserved between the free ends of the two clamping parts (121). Both free ends are provided with locking planes (1214). The locking planes (1214) are adjacent to the rear end faces of the free ends. Bolts pass through the locking planes (1214) of the two clamping parts (121) and are connected to nuts to adjust the size of the gap (1212) to clamp and fix the front fork steering tube (31).

2. The stem assembly as described in claim 1, characterized in that: The integrated cover (11) includes a U-shaped top plate (111) and a U-shaped enclosure (112) arranged along the edge of the U-shaped top plate. The top surface and left and right sides of the first connecting end are provided with continuous steps (1210). The integrated cover (11) is placed on the steps (1210), and the U-shaped top plate (111) is spliced ​​together with the top surface of the stem body (12). The U-shaped enclosure (112) is spliced ​​together with the side of the stem body (12) and connected together by bolts.

3. A stem assembly as described in claim 2, characterized in that: The front end of the U-shaped top plate (111) is provided with a mounting ear (1110), and the bolt passes through the mounting ear (1110) and the stem body (12) in sequence, and is connected with the nut.

4. The stem assembly as described in claim 1, characterized in that: The first connecting end is provided with two threaded locking holes (1213). The threaded locking holes (1213) penetrate the locking plane (1214) of the free ends of the two clamping parts (121), and one of the threaded locking holes (1213) penetrates from left to right and the other penetrates from right to left.

5. A stem assembly as described in claim 1, characterized in that: The second connecting end includes an upper arc-shaped part (1221) and a lower arc-shaped part (1222) arranged opposite to each other. The upper arc-shaped part (1221) and the lower arc-shaped part (1222) are connected together by bolts and form a second mounting hole (1223). The second mounting hole (1223) is used to install the handlebar (2).

6. A stem assembly as described in claim 1, characterized in that: The bottom surface of the second connecting end is provided with a clearance groove (1224) for avoiding the bicycle's front fork body (32).

7. A bicycle, characterized in that: The assembly includes a stem assembly, handlebars (2), fork steering tube (31), and head tube (4) as described in any one of claims 1 to 6, wherein the fork steering tube (31) extends from the upper end of the head tube (4) and is rotatably engaged with the head tube (4), and the first connecting end of the stem assembly is connected to the fork steering tube (31), and the second connecting end is connected to the handlebars (2).

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