CN218662248U

CN218662248U - Exempt from crank subassembly of instrument dismouting

Info

Publication number: CN218662248U
Application number: CN202223092047.4U
Authority: CN
Inventors: 晁志伟; 王一雄
Original assignee: Beijing Youbei Baiqi Technology Co ltd
Current assignee: Beijing Youbei Baiqi Technology Co ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-03-21
Anticipated expiration: 2032-11-16

Abstract

The utility model relates to a exempt from crank assembly of instrument dismouting, it includes two cranks, has all seted up the through-hole on every articulate, still includes: two mounting shaft sleeves respectively mounted at two ends of the five-way shaft core; the outer side wall of the mounting shaft sleeve is in any shape which is not a perfect circle; the two connecting shafts are respectively and fixedly connected to the outer sides of the two mounting shaft sleeves, and external threads are machined on the outer wall of each connecting shaft; the clamping and plugging assembly comprises a plug sleeve and an operating handle arranged at one end of the plug sleeve, a connecting groove is formed in one end, away from the operating handle, of the plug sleeve, and an internal thread in threaded fit with the connecting shaft is machined on the inner wall of the connecting groove; the through hole comprises an insertion groove and a limiting groove communicated with the bottom of the insertion groove and used for the connecting shaft and the plug sleeve to extend into, and when the plug sleeve is connected with the connecting shaft, the outer side wall of the plug sleeve is tightly abutted to the groove wall of the limiting groove. The crank assembling and disassembling tool has the advantages that the crank can be assembled or disassembled without assistance of tools, and the operation is simple and convenient.

Description

Exempt from crank subassembly of instrument dismouting

Technical Field

The application relates to the field of bicycle cranks, in particular to a crank assembly free of tool disassembly and assembly.

Background

The crank is a universal component on bicycle products, and the crank can drive the chain wheel to rotate. The split crank on the market comprises a crank body, a connecting part fixedly connected to one end of the crank body and used for being connected with a five-way shaft core, and a pedal installation part fixedly connected to the other end of the crank body and used for being installed with a pedal, wherein the pedal installation part is located on the outer side of the connecting part. The existing installation and fixation mode of the crank and the five-way shaft core is usually fixed by using bolts, specifically, outer hexagonal connecting shafts are fixedly connected at two ends of the five-way shaft core, one end, far away from the five-way shaft core, of each outer hexagonal connecting shaft is provided with an inner threaded hole, and a connecting part is provided with an inserting groove which is in inserting fit with the outer hexagonal connecting shafts and an inner threaded groove which is matched with a professional bolt and is communicated with the bottom of the inserting groove. Because the crank needs to be very inseparable with outer hexagonal connecting axle pegging graft to guarantee the stability of riding, so when the installation need use professional instrument to establish outer hexagonal connecting axle with the crank first tightly overlaps, later use the professional bolt of corresponding specification and cooperate the instrument to twist simultaneously including on screw hole and articulate inner wall, fix the position of crank. Therefore, the crank can be assembled or disassembled only by matching a special disassembling tool with a wrench when being assembled or disassembled, the assembly is inconvenient, and the later maintenance is troublesome.

SUMMERY OF THE UTILITY MODEL

In order to facilitate quick installation of the crank, the application provides a crank assembly free of tool disassembly.

The application provides a exempt from crank assembly of instrument dismouting adopts following technical scheme:

the utility model provides a exempt from crank assembly of instrument dismouting, includes two cranks that are used for being connected with the five-way axle core, every the crank all includes the crank body, connects be used for of crank body one end with the five-way axle core is connected at connecting portion and is connected the crank body other end be used for with pedal installation department of being connected, pedal installation department is located the outside of connecting portion, every the through-hole has all been seted up on the articulate connecting portion, still includes:

two mounting shaft sleeves are arranged and are respectively mounted at two ends of the five-way shaft core; the outer side wall of the mounting shaft sleeve is in any shape which is not a perfect circle;

two connecting shafts are arranged and fixedly connected to the outer sides of the two mounting shaft sleeves respectively, the axis of each connecting shaft is superposed with the axis of the five-way shaft core, and external threads are machined on the outer wall of each connecting shaft;

the clamping plug assembly comprises a plug sleeve and an operating handle, the plug sleeve is used for being in threaded fit with the connecting shaft, the operating handle is installed at one end of the plug sleeve, a connecting groove is formed in one end, away from the operating handle, of the plug sleeve, and internal threads in threaded fit with the connecting shaft are machined on the inner wall of the connecting groove;

the through hole comprises an insertion groove for embedding the mounting shaft sleeve and a limiting groove communicated with the bottom of the insertion groove and used for the connecting shaft and the plug sleeve to extend into, and when the plug sleeve is connected with the connecting shaft, the outer side wall of the plug sleeve is tightly abutted to the groove wall of the limiting groove.

Through adopting above-mentioned technical scheme, when the installation, establish the crank sleeve at installation axle sleeve for the lateral wall of installation axle sleeve and the tight butt of cell wall of inserting groove, later the staff holds operating handle, with plug bush and connecting axle screw-thread fit, until revolving to twist operating handle makes the connecting axle move to the tank bottom of spread groove, the lateral wall of plug bush and the tight butt of cell wall of spacing groove this moment fix the position of crank on the five-way axle core. The operating handle is located outside the crank, when the crank is detached, a worker can detach the crank by screwing the operating handle with hands in the opposite direction, and the crank is simpler and more convenient to mount and detach.

Optionally, the wall thickness of the plug sleeve is gradually reduced from one end close to the operating handle to one end far away from the operating handle; the inner diameter of the limiting groove is gradually increased from one end close to the inserting groove to one end far away from the inserting groove.

Through adopting above-mentioned technical scheme, along with the plug bush to the inside motion of spacing groove, the lateral wall of plug bush and spacing groove is tensioning gradually for articulate installation is more firm, and makes things convenient for laborsaving more when dismantling.

Optionally, the lateral wall of installation axle sleeve includes a plurality of planes and a plurality of cambered surface, every the cambered surface all protrudes the plane, it is a plurality of the plane sets gradually with a plurality of cambered surface interval, adjacent the plane with form the contained angle between the cambered surface.

By adopting the technical scheme, the outer side wall of the mounting shaft sleeve is in a non-regular circle shape, so that the phenomenon that the bicycle cannot be normally ridden due to the relative rotation of the crank and the five-way shaft core when the bicycle is ridden is prevented; simultaneously, the outer side wall of the mounting shaft sleeve is designed into a form of a plane matched with an arc surface, so that the crank and the mounting shaft sleeve are more attached to each other while the crank and the five-way shaft core are prevented from rotating relatively, and the crank is more firmly mounted.

Optionally, one end of the insertion groove, which is far away from the limiting groove, is provided with a first chamfer angle convenient for insertion.

Through adopting above-mentioned technical scheme, first chamfer can be so that more smooth when inserting the installation axle sleeve in the inserting groove.

Optionally, the outer diameter of the connecting shaft is smaller than the outer diameter of the mounting shaft sleeve, the inner diameter of the notch of the limiting groove is consistent with the maximum inner diameter of the insertion groove, and a step is formed between the bottom of the limiting groove and the insertion groove.

By adopting the technical scheme, the shape of the limiting groove is designed to be smaller, so that the connecting strength of the crank can be improved; meanwhile, a step is formed between the limiting groove and the inserting groove, and when the mounting shaft sleeve is mounted in place, the crank cannot move inwards continuously, so that the mounting is facilitated.

Optionally, the cross section of the operating handle completely seals the notch of the limiting groove.

Through adopting above-mentioned technical scheme, the staff of being convenient for holds operating handle and installs or dismantle, can reduce the not hard up probability that the back crank drops of cock sleeve simultaneously.

Optionally, one side of the operating handle, which is far away from the plug sleeve, is a plane, and one side of the operating handle, which is far away from the plug sleeve, does not protrude out of the pedal installation part.

Because operating handle bulges the outside of crank connecting portion, through adopting above-mentioned technical scheme, can avoid riding passerby when riding, operating handle causes the influence to riding passerby's shank action.

Optionally, the card stopper subassembly uses the integral type package to mould the material and make, promptly the plug bush is made by metal material, operating handle is supported by the plastic material.

Through adopting above-mentioned technical scheme, operating handle uses the plastic material to make not only can increase operating handle and the frictional force of people's palm, and the installation is convenient more laborsaving during with the dismantlement, uses the plastic material simultaneously can reduce the damage of operating handle to people's palm when the installation.

Optionally, the shape of the operating handle is triangular, and the edges of the operating handle are subjected to soft transition treatment.

By adopting the technical scheme, the operating handle is convenient to drive to rotate, and the operation is more labor-saving; and people are more comfortable when controlling the operation handle to rotate, and the damage to the palm is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the five-way shaft core, the installation shaft sleeve, the connecting shaft and the clamping plug assembly are arranged, the crank is in threaded fit with the connecting shaft and tensioned on the five-way shaft core, the crank can be directly sleeved on the installation shaft sleeve by using hands when the five-way shaft core is used, so that the installation shaft sleeve is tightly abutted against the groove wall of the insertion groove, then the operating handle is screwed by hands, so that the plug sleeve is in threaded fit with the connecting shaft, when the plug sleeve is installed in place, the side wall of the plug sleeve is tightly abutted against the side wall of the limiting groove, so that the crank is tensioned, and the positions of the crank at two ends of the five-way shaft core are fixed; on the basis of ensuring the mounting stability of the crank, the crank is more convenient to mount and dismount, and the mounting and dismounting cost is saved;

2. the outer side wall of the plug sleeve is designed to be conical, the shape of the limiting groove is also designed to be conical matched with the shape of the outer side wall of the plug sleeve, the plug sleeve and the crank are attached more and more tightly along with the gradual extension of the plug sleeve into the crank, so that the crank is installed more and more stably, and meanwhile, the outer side wall of the plug sleeve is designed to be conical, so that a certain moving space is generated for the plug sleeve during disassembly, and the plug sleeve is more convenient and labor-saving during disassembly;

3. through being the plastic material with operating handle design, can increase the frictional force of staff and operating handle when installation or dismantlement card stopper subassembly, the installation of being convenient for uses the plastic material simultaneously, and is softer to the staff, and the damage is littleer.

4. The outer side wall of the mounting shaft sleeve is set to be matched with a plurality of planes and a plurality of cambered surfaces, so that the joint degree of the crank and the mounting shaft sleeve can be increased while the crank and the five-way shaft core are prevented from rotating relatively, and the crank is more firmly and tightly mounted.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

FIG. 2 is an exploded view showing the positional relationship of the respective parts

Fig. 3 is a schematic sectional view showing the arrangement of the respective components.

Description of reference numerals: 1. a five-way shaft core; 2. a crank; 21. a crank body; 22. a connecting portion; 23. a pedal mounting portion; 24. a through hole, 241, a plug groove; 242. a first chamfer; 243. a limiting groove; 244. a second chamfer; 245. a step; 3. a connecting shaft; 4. installing a shaft sleeve; 41. a plane; 43. a cambered surface; 5. a plug assembly; 51. a plug sleeve; 511. connecting grooves; 512. a third chamfer; 52. a handle is operated.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses exempt from crank assembly of instrument dismouting. Referring to fig. 1 and 2, the tool-less crank assembly comprises two cranks 2 for mounting on a five-way shaft core 1. The crank 2 comprises a crank 2 body, a connecting part 22 fixedly connected to one end of the crank 2 body and used for being connected with the five-way shaft core 1, and a pedal mounting part 23 fixedly connected to the other end of the crank 2 body and used for being connected with a pedal, wherein the pedal mounting part 23 is positioned on the outer side of the connecting part 22, and a through hole 24 for the five-way shaft core 1 to penetrate through is formed in the connecting part 22.

Referring to fig. 2, the tool-free crank assembly further includes two mounting sleeves 4 fixedly connected to two ends of the five-way shaft core 1, two connecting shafts 3 fixedly connected to outer sides of the two mounting sleeves 4, and a clamping plug assembly 5 engaged with the connecting shafts 3 and tensioning the crank 2. The axis of the connecting shaft 3 coincides with the axis of the five-way shaft core 1, an external thread is processed on the outer wall of the connecting shaft 3, and the outer diameter of the connecting shaft 3 is not larger than that of the mounting shaft sleeve 4, so that the through hole 24 of the crank 2 can conveniently penetrate through the external thread.

Referring to fig. 2, the blocking assembly 5 includes a sleeve 51 in threaded engagement with the connecting shaft 3 and an operating handle 52 fixedly connected to one end of the sleeve 51, a connecting groove 511 is formed at one end of the sleeve 51 away from the operating handle 52, and an internal thread in engagement with the connecting shaft 3 is formed on a groove wall of the connecting groove 511. The through hole 24 includes an insertion groove 241 engaged with the mounting sleeve 4 and a limiting groove 243 communicated with the bottom of the insertion groove 241 for the connection shaft 3 and the plug bush 51 to pass through. When the crank 2 is installed, the crank penetrates through the connecting shaft 3 and is sleeved on the mounting shaft sleeve 4, at the moment, the groove walls of the mounting shaft sleeve 4 and the insertion groove 241 are tightly abutted, then a worker holds the operating handle 52 with one hand and holds the bicycle body with the other hand, the plug sleeve 51 is inserted into the port position of the limiting groove 243, then the operating handle 52 is screwed to enable the plug sleeve 51 and the connecting shaft 3 to be gradually in threaded fit, and when the connecting shaft 3 extends into the bottom of the connecting groove 511, the outer side wall of the plug sleeve 51 is tightly abutted to the groove wall of the limiting groove 243. The cross section of the operating handle 52 completely seals the notch of the limiting groove 243, so that the operation of a worker is facilitated, and the crank 2 is prevented from being separated from the five-way shaft core 1.

Referring to fig. 2, the outer side wall of the mounting sleeve 4 is in a non-perfect-circle shape, and the insertion groove 241 is also in a shape matched with the mounting sleeve 4, so as to prevent the crank 2 and the five-way shaft core 1 from rotating relatively during the riding process, which results in the incapability of riding. In order to enable the connecting groove 511 to be more attached to the mounting sleeve 4 on the basis of preventing the crank 2 and the mounting sleeve 4 from rotating relatively, the outer side wall of the mounting sleeve 4 comprises a plurality of planes 41 and a plurality of cambered surfaces 43, each cambered surface 43 protrudes out of the plane 41, the center of each cambered surface 43 coincides with the axis of the five-way shaft core 1, and an included angle is formed between the adjacent planes 41 and the cambered surfaces 43. The application is described by taking an example that the outer side wall of the mounting sleeve 4 comprises three planes 41 and three cambered surfaces 43, and the planes 41 and the cambered surfaces 43 are arranged at intervals in sequence.

Referring to fig. 2 and 3, in order to make the plug sleeve 51 and the groove wall of the limit groove 243 fit more closely to tension the crank 2 on the five-way shaft core 1 and ensure the mounting firmness of the crank 2, the outer side wall of the plug sleeve 51 is tapered, i.e., the wall thickness of the plug sleeve 51 is gradually reduced from the end close to the operating handle 52 to the end far away from the operating handle 52. Accordingly, the shape of the retaining groove 243 is also tapered to fit the sidewall of the sleeve 51. As the plug bush 51 goes deep into the limit groove 243, the side wall of the plug bush 51 abuts against the groove wall of the limit groove 243 to tension the crank 2; the design also makes the mounting and dismounting of the plug bush 51 more labor-saving, and is convenient for realizing the tool-free auxiliary mounting of the crank 2.

Referring to fig. 2, in order to facilitate the installation shaft sleeve 4 to smoothly enter the insertion groove 241 from the notch of the insertion groove 241 and achieve the insertion fit between the crank 2 and the installation shaft sleeve 4, a first chamfer 242 facilitating the installation of the shaft sleeve 4 is formed at the outer edge of the notch of the insertion groove 241.

Referring to fig. 2, a second chamfer 244 for facilitating the insertion of the plug bush 51 is formed at the outer edge of the notch of the limiting groove 243; in order to facilitate the insertion of the sleeve 51 from the notch of the limiting groove 243, a third chamfer 512 is formed at the outer edge and the inner edge of the opening end of the sleeve 51.

Referring to fig. 2 and 3, in order to allow the insertion groove 241 to pass through the outside of the connecting shaft 3, the outer diameter of the connecting shaft 3 should not be larger than the outer diameter of the mounting sleeve 4, and in order to ensure the mounting strength of the crank 2, the inner diameter of the limiting groove 243 should be as small as possible, so the outer diameter of the connecting shaft 3 of the present application is smaller than the outer diameter of the mounting sleeve 4, the inner diameter of the notch of the limiting groove 243 is consistent with the maximum inner diameter of the insertion groove 241, and at this time, a step 245 is formed at the connection position of the groove bottom of the limiting groove 243 and the insertion groove 241.

Referring to fig. 1 and 2, the side of the operating handle 52 away from the sleeve 51 is a flat surface 41 and does not protrude outside the pedal mounting portion 23 to avoid affecting the leg movement of the rider during riding.

Referring to fig. 1 and 2, in order to facilitate the operation of the worker, the blocking and plugging member 5 is made of an integral plastic-coated material, that is, the plug sleeve 51 is made of a metal material, and the operation handle 52 is made of a plastic material. Therefore, when the device is installed, the friction force between the operating handle 52 and the hands of workers can be increased, the installation is convenient, the damage of the operating handle 52 to the palms of the people can be reduced as much as possible, and the labor is saved during the installation.

Referring to fig. 2, in order to facilitate driving the operating handle 52 to rotate, the operating handle 52 is in any shape other than a perfect circle, and the edges of the operating handle 52 are all subjected to soft transition treatment, so that the operation is more comfortable, and the palm is protected. The specific contour shape of the operating handle 52 is mainly determined whether to facilitate the operation and the application of force, and does not exclude the design that the operating handle 52 is designed to be circular in a special situation, or the contour is designed to be circular, and the peripheral surface is roughened to increase the friction force. The present application will be described by taking as an example a triangular shape with a gentle transition of the operating handle 52.

The implementation principle of the crank assembly free of tool disassembly in the embodiment of the application is as follows: when the five-way shaft core 1 is installed in a five-way pipe of a bicycle, a chain wheel is installed, after the positions of the five-way shaft core 1 and the chain wheel are fixedly installed, the connecting portion 22 of one crank 2 penetrates through the connecting shaft 3 and is sleeved on the mounting shaft sleeve 4, the mounting shaft sleeve 4 is tightly attached to the crank 2, then the operator holds the operating handle 52 with hands, the open end of the plug sleeve 51 penetrates through the notch of the limiting groove 243 to extend into the limiting groove 243 and abut against the connecting shaft 3, then the operating handle 52 is screwed until the connecting shaft 3 reaches the bottom of the connecting groove 511, at the moment, the outer side wall of the plug sleeve 51 tightly abuts against the groove wall of the limiting groove 243, the crank 2 is tensioned, and the position of the crank 2 on the five-way shaft core 1 is fixed. When the crank is disassembled, the operating handle 52 is screwed by hand in the opposite direction, and the position of the crank 2 on the mounting shaft sleeve 4 is also driven to loosen and fall off along with the loosening of the plug sleeve 51, so that the disassembly and the assembly are simple and convenient, and the cost is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a exempt from crank assembly of instrument dismouting, includes two cranks (2) that are used for being connected with five-way axle core (1), every crank (2) all include crank (2) body, connect be used for of crank (2) body one end with connecting portion (22) and connection that five-way axle core (1) are connected be used for with pedal installation department (23) of being connected of crank (2) body other end, pedal installation department (23) are located the outside of connecting portion (22), every through-hole (24), its characterized in that have all been seted up on connecting portion (22) of crank (2): further comprising:

two mounting shaft sleeves (4) are arranged and are respectively mounted at two ends of the five-way shaft core (1); the outer side wall of the mounting shaft sleeve (4) is in a non-circular arbitrary shape;

two connecting shafts (3) are fixedly connected to the outer sides of the two mounting shaft sleeves (4) respectively, the axis of each connecting shaft (3) is superposed with the axis of the five-way shaft core (1), and external threads are machined on the outer wall of each connecting shaft (3);

the clamping and plugging assembly (5) comprises a plug sleeve (51) in threaded fit with the connecting shaft (3) and an operating handle (52) installed at one end of the plug sleeve (51), a connecting groove (511) is formed in one end, away from the operating handle (52), of the plug sleeve (51), and an internal thread in threaded fit with the connecting shaft (3) is machined on the inner wall of the connecting groove (511);

the through hole (24) comprises an insertion groove (241) for embedding the mounting shaft sleeve (4) and a limiting groove (243) communicated with the bottom of the insertion groove (241) and used for the connecting shaft (3) and the plug sleeve (51) to extend into, and when the plug sleeve (51) is connected with the connecting shaft (3), the outer side wall of the plug sleeve (51) is tightly abutted to the groove wall of the limiting groove (243).

2. The tool-less crank assembly of claim 1, wherein: the plug sleeve (51) has a wall thickness gradually reduced from one end close to the operating handle (52) to one end far away from the operating handle (52); the inner diameter of the limiting groove (243) is gradually increased from one end close to the insertion groove (241) to one end far away from the insertion groove (241).

3. The tool-less crank assembly of claim 1, wherein: the lateral wall of installation axle sleeve (4) includes a plurality of planes (41) and a plurality of cambered surface (43), every cambered surface (43) all bulge plane (41), it is a plurality of plane (41) and a plurality of cambered surface (43) interval sets gradually, adjacent plane (41) with form the contained angle between cambered surface (43).

4. The tool-less crank assembly of claim 3, wherein: one end of the insertion groove (241), which is far away from the limiting groove (243), is provided with a first chamfer (242) convenient for insertion.

5. The tool-less crank assembly of claim 4, wherein: the outer diameter of the connecting shaft (3) is smaller than that of the mounting shaft sleeve (4); the inner diameter of the notch of the limiting groove (243) is consistent with the maximum inner diameter of the insertion groove (241), and a step (245) is formed between the groove bottom of the limiting groove (243) and the insertion groove (241).

6. The tool-less crank assembly of claim 1, wherein: the cross section of the operating handle (52) completely seals off the notch of the limiting groove (243).

7. The tool-less crank assembly of claim 6, wherein: one side of the operating handle (52) far away from the plug sleeve (51) is a plane (41), and one side of the operating handle (52) far away from the plug sleeve (51) does not protrude out of the pedal mounting part (23).

8. The tool-less crank assembly of claim 7, wherein: the card stopper subassembly (5) use the integral type to wrap the plastics material and make, promptly the plug bush (51) is made by metal material, operating handle (52) are supported by the plastic material.

9. The tool-less crank assembly of claim 8, wherein: the shape of the operating handle (52) is triangular, and the edges of the operating handle (52) are all subjected to soft transition treatment.