CN220682565U

CN220682565U - Hollow integral dental tray crank with anti-falling structure

Info

Publication number: CN220682565U
Application number: CN202322484810.6U
Authority: CN
Inventors: 宋泽宇; 季小峰; 邹川江
Original assignee: Lanxi Wheel Top Cycle Industries Ltd
Current assignee: Lanxi Wheel Top Cycle Industries Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-03-29
Anticipated expiration: 2033-09-13

Abstract

The utility model discloses a hollow integrated dental disc crank with an anti-falling structure, which comprises a fluted disc (1), a hollow shaft lever (2), a right crank (3) and a left crank (4), wherein the end part of the left crank (4) is provided with a mounting hole (5) matched with the hollow shaft lever (2), and the inner side wall of the mounting hole (5) is provided with a fastening screw hole (6); the hollow shaft lever (2) is provided with a matching hole (7) at the position corresponding to the fastening screw hole (6), and a fastening screw (8) is arranged between the matching hole (7) and the fastening screw hole (6). The utility model not only can be used stably, but also has the advantages of wide application range, convenient installation and high structural strength.

Description

Hollow integral dental tray crank with anti-falling structure

Technical Field

The utility model relates to a dental tray crank handle, in particular to a hollow integrated dental tray crank with an anti-falling structure.

Background

The chain wheel crank is a part of the bicycle and is used for connecting an external treading piece with the chain wheel and the chain, so that the transmission effect is achieved; the crank handle of the existing bicycle is generally described in the document with the patent number of CN201711026727.7 and consists of a left crank arm, a right crank arm, a tooth disc and a crank shaft; one of the crank arms is provided with a slit, a threaded hole and a clamping plate, and the stability of connection between the crank and the crank arm can be ensured while the crank is conveniently arranged on the crank arm by utilizing the mutual matching of the slit, the threaded hole and the clamping plate; but in the in-process of in-service use, because the in-process of outside trampling power transmission and external environment can cause threaded hole's bolt to appear becoming flexible, serious can cause even that splint to fall out from the slit, and then the phenomenon that leads to the crank arm to drop from the crank takes place, and the stability of whole use is relatively poor. Therefore, the existing dental tray crank has the problem of poor use stability.

Disclosure of Invention

The utility model aims to provide a hollow integrated dental tray crank with an anti-falling structure. The utility model has the advantage of high use stability.

The technical scheme of the utility model is as follows: the hollow integrated dental disc crank with the anti-falling structure comprises a fluted disc, a hollow shaft rod, a right crank and a left crank, wherein the end part of the left crank is provided with a mounting hole matched with the hollow shaft rod, and the inner side wall of the mounting hole is provided with a fastening screw hole; a matching hole is formed in the hollow shaft rod at a position corresponding to the fastening screw hole, and a fastening screw is arranged between the matching hole and the fastening screw hole; utilize the holding screw can form a fixed tie point between cavity axostylus axostyle and left crank, the cooperation is gone up in the cooperation and is connected the cooperation between mounting hole and the cavity axostylus axostyle tip to make the left crank can be stable install on the cavity axostylus axostyle, for the mode of adopting the clamp lock formula between left crank and the cavity axostylus axostyle in the past, the stability of connecting between the two is higher, even under the great circumstances of outside vibrations in the use, the phenomenon that also can not appear droing has reached a purpose that prevents that the crank from dropping.

In the hollow integrated dental tray crank with the anti-falling structure, the fastening screw hole comprises a threaded connecting section and a positioning section, and the inner diameter of the positioning section is smaller than that of the threaded connecting section; an inner thread is arranged on the inner side wall of the threaded connecting section; the positioning section is utilized to guide the installation position of the set screw, and the threaded connection end is used for guaranteeing the connection fixing state between the set screw and the set screw hole, so that the assembly is convenient.

In the hollow integrated dental tray crank with the anti-falling structure, the whole set screw is in a convex shape, and the outer diameter of the end part with the larger diameter on the set screw is the same as the inner diameter of the threaded connecting section; the external surface of the end part with larger diameter on the set screw is provided with external threads matched with the internal threads; the outer diameter of the smaller end part of the set screw is the same as the inner diameter of the positioning section.

In the hollow integrated dental tray crank with the anti-falling structure, the side end part of the mounting hole is provided with a deformation joint; a plurality of through locking screw holes are formed in the position, corresponding to the deformation joint, of the left crank, and locking screws are arranged in each locking screw hole in a threaded manner; the deformation joint is utilized to enable the whole mounting hole to have certain deformation capacity, so that the mounting hole is better suitable for hollow shaft rods with different sizes, and the application range is enlarged.

In the hollow integrated dental tray crank with the anti-falling structure, the inner side wall of the mounting hole is provided with the inner spline; external splines are arranged on the outer side surface of the hollow shaft rod, which corresponds to the position matched with the mounting hole, and the external splines are matched with the internal splines; the internal spline and the external spline are matched with each other, so that the connection stability between the left crank and the hollow shaft rod can be further improved, and the structural strength is further improved.

In the hollow integrated dental tray crank with the anti-falling structure, the end part of the right crank is provided with a plurality of annular fixed claws which are uniformly distributed, and the end part of each fixed claw is provided with a threaded hole; a plurality of evenly distributed fixing seats are arranged on the fluted disc, and threaded holes are also formed in each fixing seat; a fixing piece is arranged between the threaded hole of the fixing seat and the threaded hole of the fixing claw; the connecting area between the right crank and the fluted disc can be increased by utilizing the plurality of fixing claws, so that the stability of the structure is further increased.

In the hollow integrated tooth disc crank with the anti-falling structure, the tooth disc comprises a main tooth disc and an auxiliary tooth disc, and the main tooth disc is fixedly connected with the right crank; the auxiliary fluted disc is arranged on one side of the main fluted disc, which is far away from the right crank, and the diameter of the auxiliary fluted disc is smaller than that of the main fluted disc; the auxiliary fluted disc is connected with the main fluted disc through the fixing seat and the fixing piece.

Compared with the prior art, the utility model improves the existing dental tray crank, the mounting hole of the left crank is provided with the fastening screw hole, the hollow shaft lever is provided with the matching hole, the fastening screw is arranged between the fastening screw hole and the matching hole, a fixed connection point can be formed between the hollow shaft lever and the left crank by using the fastening screw, and the mounting hole is matched with the connection between the end part of the hollow shaft lever, so that the left crank can be stably mounted on the hollow shaft lever, compared with the prior left crank and the hollow shaft lever in a clamp-lock mode, the stability of connection between the left crank and the hollow shaft lever is higher, the phenomenon of falling does not occur even under the condition of larger external vibration in the use process, the purpose of preventing the crank from falling is achieved, and the use stability is improved. In addition, the fastening screw hole is formed by the threaded connecting section and the positioning section, the positioning section can be used for guiding the installation position of the fastening screw, and the threaded connecting end is used for ensuring the connection and fixation state between the fastening screw and the fastening screw hole, so that the assembly is convenient; the deformation joint is arranged at the side end part of the mounting hole, so that the whole mounting hole has certain deformation capacity by utilizing the deformation joint, thereby being better suitable for hollow shaft rods with different sizes and expanding the application range; the locking screw holes and the locking screws on the deformation joints can shrink the deformation joints after the left crank is mounted on the hollow shaft rod, so that the connection tightness between the left crank and the hollow shaft rod is improved, and the mounting stability is ensured; the inner spline is arranged on the inner side wall of the mounting hole, the outer spline is arranged on the outer side wall of the hollow shaft rod, and the connection stability between the left crank and the hollow shaft rod can be further improved by utilizing the mutual matching of the inner spline and the outer spline, so that the structural strength is further improved; the right crank is provided with the plurality of annular uniform fixed claws, the right crank is connected with the fluted disc through the fixed claws, and the connecting area between the right crank and the fluted disc can be increased by utilizing the plurality of fixed claws, so that the stability of the structure is further improved; the main fluted disc and the auxiliary fluted disc are arranged, so that the whole tooth disc crank handle has the speed change effect. Therefore, the utility model not only can be used stably, but also has the advantages of wide application range, convenient installation and high structural strength.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a top view of the present utility model;

FIG. 4 is a schematic view of the structure of the left crank;

fig. 5 is a top view of a hollow shaft.

The marks in the drawings are: the novel gear comprises a 1-fluted disc, a 2-hollow shaft rod, a 3-right crank, a 4-left crank, a 5-mounting hole, a 6-fastening screw hole, a 7-matching hole, an 8-fastening screw, a 9-deformation joint, a 10-locking screw hole, an 11-locking screw, a 12-internal spline, a 13-external spline, a 14-fixing claw, a 15-threaded hole and a 16-fixing piece.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.

Examples. The hollow integrated dental disc crank with the anti-falling structure is shown in figures 1 to 5, and comprises a fluted disc 1, a hollow shaft lever 2, a right crank 3 and a left crank 4, wherein the end part of the left crank 4 is provided with a mounting hole 5 matched with the hollow shaft lever 2, and the inner side wall of the mounting hole 5 is provided with a fastening screw hole 6; the hollow shaft lever 2 is provided with a matching hole 7 at the position corresponding to the fastening screw hole 6, and a fastening screw 8 is arranged between the matching hole 7 and the fastening screw hole 6.

The fastening screw hole 6 comprises a threaded connecting section and a positioning section, and the inner diameter of the positioning section is smaller than that of the threaded connecting section; an inner thread is arranged on the inner side wall of the threaded connecting section; the whole set screw 8 is in a convex shape, and the outer diameter of the end part with the larger diameter on the set screw 8 is the same as the inner diameter of the threaded connecting section; the external surface of the end part with larger diameter on the set screw 8 is provided with external threads matched with the internal threads; the outer diameter of the smaller end part of the set screw 8 is the same as the inner diameter of the positioning section; a deformation joint 9 is arranged at the side end part of the mounting hole 5; a plurality of through locking screw holes 10 are formed in the left crank 4 at positions corresponding to the deformation joints 9, and locking screws 11 are arranged in each locking screw hole 10 in a threaded manner; an inner spline 12 is arranged on the inner side wall of the mounting hole 5; an external spline 13 is arranged on the outer side surface of the hollow shaft lever 2 corresponding to the position matched with the mounting hole 5, and the external spline 13 is matched with the internal spline 12; the end part of the right crank 3 is provided with a plurality of annular fixed claws 14 which are uniformly distributed, and the end part of each fixed claw 14 is provided with a threaded hole 15; a plurality of evenly distributed fixing seats are arranged on the fluted disc 1, and threaded holes 15 are also formed in each fixing seat; a fixing piece 16 is arranged between the threaded hole 15 of the fixing seat and the threaded hole 15 of the fixing claw 14; the fluted disc 1 comprises a main fluted disc and an auxiliary fluted disc, and the main fluted disc is fixedly connected with the right crank 3; the auxiliary fluted disc is arranged on one side of the main fluted disc, which is far away from the right crank 3, and the diameter of the auxiliary fluted disc is smaller than that of the main fluted disc; the secondary toothed disc is connected to the primary toothed disc by a fixed seat and a fixed member 16.

Working principle: when in specific installation, the fixed claw 14 on the right crank 3 is aligned with the fixed seat on the fluted disc 1, the threaded holes 15 on the fixed claw and the fixed claw are aligned with the fixed seat, and finally the right crank 3 is fixed on the fluted disc 1 by the aid of the fixing piece 16 (generally the fixing piece 16 is a bolt); simultaneously, aligning the mounting hole 5 on the left crank 4 with the end part of the hollow shaft lever 2 with the external spline 13, aligning the matching hole 7 on the hollow shaft lever 2 with the mounting hole 5 on the left crank 4, inserting the hollow shaft lever 2 into the mounting hole 5 of the left crank 4, and using the internal spline 12 and the external spline 13 to enable the left crank 4 to be first fixed with the hollow shaft lever 2; then, firstly installing the locking screw 11 into the locking screw hole 10, and adjusting the screwing degree of the locking screw 11 according to the tightness of the connection between the left crank 4 and the hollow shaft lever 2; finally, the set screw 8 is installed in the set screw hole 6, and the set screw 8 is completely installed in the set screw hole 6, so that the place with external threads on the set screw 8 is in threaded connection with the set screw hole 6, the bottom end of the set screw 8 can enter the matching hole 7, and further, the connection tightness between the left crank 4 and the hollow shaft rod 2 is secondarily fixed, and therefore, even if the locking screw 11 is loosened, the connection stability between the left crank 4 and the hollow shaft rod 2 can be ensured, the phenomenon that the left crank 4 falls off from the hollow shaft rod 2 is avoided, and the use stability is improved; finally, the hollow shaft lever 2 and the fluted disc 1 are assembled together, so that the fluted disc crank handle can be installed on a bicycle for use.

Claims

1. Hollow integral type tooth dish crank with anti-drop structure, including fluted disc (1), cavity axostylus axostyle (2), right crank (3) and left crank (4), its characterized in that: the end part of the left crank (4) is provided with a mounting hole (5) matched with the hollow shaft lever (2), and the inner side wall of the mounting hole (5) is provided with a fastening screw hole (6); the hollow shaft lever (2) is provided with a matching hole (7) at the position corresponding to the fastening screw hole (6), and a fastening screw (8) is arranged between the matching hole (7) and the fastening screw hole (6).

2. The hollow integrated dental tray crank with anti-drop structure of claim 1, wherein: the fastening screw hole (6) comprises a threaded connecting section and a positioning section, and the inner diameter of the positioning section is smaller than that of the threaded connecting section; and an inner thread is arranged on the inner side wall of the threaded connection section.

3. The hollow integrated dental tray crank with anti-drop structure of claim 2, wherein: the whole set screw (8) is in a convex shape, and the outer diameter of the end part with the larger diameter on the set screw (8) is the same as the inner diameter of the threaded connecting section; the external surface of the end part with larger diameter on the set screw (8) is provided with external threads matched with the internal threads; the outer diameter of the smaller end part of the set screw (8) is the same as the inner diameter of the positioning section.

4. The hollow integrated dental tray crank with anti-drop structure of claim 1, wherein: a deformation joint (9) is arranged at the side end part of the mounting hole (5); a plurality of through locking screw holes (10) are formed in the left crank (4) at positions corresponding to the deformation joints (9), and locking screws (11) are arranged in each locking screw hole (10) in a threaded mode.

5. The hollow integrated dental tray crank with anti-drop structure of claim 1, wherein: an inner spline (12) is arranged on the inner side wall of the mounting hole (5); external splines (13) are arranged on the outer side face of the hollow shaft lever (2) corresponding to the position matched with the mounting hole (5), and the external splines (13) are matched with the internal splines (12).

6. The hollow integrated dental tray crank with anti-slip structure of any one of claims 1 to 5, wherein: the end part of the right crank (3) is provided with a plurality of annular fixed claws (14) which are uniformly distributed, and the end part of each fixed claw (14) is provided with a threaded hole (15); a plurality of evenly distributed fixing seats are arranged on the fluted disc (1), and threaded holes (15) are also formed in each fixing seat; a fixing piece (16) is arranged between the threaded hole (15) of the fixing seat and the threaded hole (15) of the fixing claw (14).

7. The hollow unitary dental tray crank with anti-slip structure of claim 6, wherein: the fluted disc (1) comprises a main fluted disc and an auxiliary fluted disc, and the main fluted disc is fixedly connected with the right crank (3); the auxiliary fluted disc is arranged on one side of the main fluted disc, which is far away from the right crank (3), and the diameter of the auxiliary fluted disc is smaller than that of the main fluted disc; the auxiliary fluted disc is connected with the main fluted disc through a fixed seat and a fixed piece (16).