Novel chain cutter

Abstract

The utility model discloses a novel chain cutter which comprises a main body, a handle, a positioning seat, an ejector pin, a screw rod, a supporting column, an anti-falling sleeve and a ball, an axially extending containing cavity and a strip-shaped groove are formed in the middle of the main body, the positioning seat is installed at the bottom of the containing cavity, and the screw rod penetrates through the tail of the main body to enter the containing cavity. A cavity is formed in the front end of the screw rod, the tail of the ejector pin is inserted into the cavity, the ejector pin is installed at the front end of the screw rod through the anti-falling sleeve, and the ball is located in the cavity and abuts against the tail of the ejector pin and the bottom of the cavity; the front end of the ejector pin is aligned with the strip-shaped groove; the supporting column is mounted on the main body, and the upper end of the supporting column forms a supporting fulcrum for the ejector pin; the upper end of the handle is mounted at the bottom of the main body; and the positioning seat is provided with a plurality of positioning pieces for positioning the chain left and right. The chain cutting-off device is ingenious in structural design, capable of achieving positioning and cutting-off of the chain and convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical tool technical field, especially, a new type chain cutter. BACKGROUND

[0002] Chain tool is a tool for disassembling and installing bicycle chain, and is widely used in bicycle maintenance and maintenance. It disconnects or connects the chain by pushing the pin shaft of the chain, and is one of the essential tools for bicycle lovers, maintenance technicians and riders. The mechanical principle of chain tool is that the pin shaft is pushed and lifted by the rotating thimble, and then the chain is disconnected for replacement or maintenance. In the prior art, the thimble is rotated and translated at the same time to push out the pin shaft, and in this case, the end of the thimble and the pin shaft will rotate and rub relative to each other. Since it is a surface contact, the friction is large, so the thimble is easily worn out, and the pin shaft is also easily worn out, which shortens the service life of the chain tool.

[0003] Therefore, the utility model aims at providing a new type chain cutter to overcome the above-mentioned shortcomings. CONTENT OF THE UTILITY MODEL

[0004] The utility model mainly solves the technical problem to provide a new type chain cutter, and the structure design is ingenious, can realize the positioning and cutting of chain, and is convenient to use.

[0005] In order to solve the above technical problems, one technical scheme of the utility model is to provide a new type chain cutter, the chain cutter includes a main body, a handle, a positioning seat, a thimble, a screw rod, a supporting column, an anti-off sleeve and a ball, an axially extending accommodating cavity and a strip-shaped groove are formed in the middle position of the main body, the positioning seat is installed at the bottom of the accommodating cavity, the screw rod passes through the tail of the main body and enters the accommodating cavity, the front end of the screw rod is provided with a cavity, the tail of the thimble is inserted into the cavity, and the thimble is installed at the front end of the screw rod through the anti-off sleeve, and the ball is located in the cavity and abuts against the tail of the thimble and the bottom of the cavity; the front end of the thimble is aligned with the strip-shaped groove; the supporting column is installed on the main body and forms a supporting fulcrum with the thimble at the upper end;

[0006] The upper end of the handle is installed at the bottom of the main body; the positioning seat is provided with a plurality of positioning pieces for positioning the left and right chains.

[0007] Further, the tail of the screw rod is fixedly connected with a long rod, and the long rod is perpendicular to the length direction of the main body.

[0008] Further, the screw rod is provided with a rear section with threads and a front section with threads, the rear section of the screw rod is threadedly connected with the main body, and the anti-off sleeve is also threadedly connected with the front section of the screw rod.

[0009] Further, the positioning seat is provided with a positioning hole and a mounting hole, the supporting column passes through the positioning hole and is fixed at the lower end of the main body; the positioning seat is fixedly mounted on the main body through a fastener passing through the mounting hole.

[0010] Further, the positioning piece comprises two low positioning pieces and two high positioning pieces, the two low positioning pieces are located at the middle position of the positioning seat, and the two high positioning pieces are located at the outer sides of the two low positioning pieces.

[0011] Further, the strip-shaped slot is provided with a wear-resistant sleeve.

[0012] Further, the inside of the handle is provided with a storage cavity, a spare ejector pin is arranged in the storage cavity, and a plug is arranged in the mouth of the storage cavity.

[0013] The chain cutter has the advantages that:

[0014] When the chain cutter is used, the positioning seat is used for positioning the chain, and the deviation is prevented; the long rod is rotated, and the screw rod, the anti-coming-off sleeve and the ball are rotated and translated along the axial direction; since the ball abuts against the bottom of the cavity and the tail of the ejector pin, the ejector pin is translated along the axial direction, the ball and the tail of the ejector pin are in rolling friction, the friction force is small, the ejector pin is only translated along the axial direction and cannot rotate, the pin shaft on the chain is slowly ejected along with the translation of the ejector pin, the chain is cut off, the wear of the ejector pin is small during the whole cutting process, the friction force is smaller, the operation is more labor-saving, and the operation is more convenient.

[0015] Furthermore, the easily-worn parts such as the ejector pin, the positioning seat and the wear-resistant sleeve can be replaced, and the replacement process is convenient and fast.

[0016] Furthermore, the positioning seat is provided with a plurality of positioning pieces, the gap between the chain links is aligned with the positioning pieces when the chain is placed, the positioning of the chain is realized, the two low positioning pieces in the middle mainly play a positioning role, the two high positioning pieces on the two sides mainly play a supporting role, the middle position of the chain is prevented from being bulged upward, and the positioning and deviation prevention are better.

[0017] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and the utility model can be implemented according to the content of the specification, and the following preferred embodiments of the utility model are described in detail in the drawings. DRAWINGS

[0018] Fig. 1 is a structural schematic view of the utility model;

[0019] Fig. 2 is a front view of the utility model;

[0020] Fig. 3 This is an axial sectional view of the present invention along the length of the main body;

[0021] The labels for each figure are as follows:

[0022] Main body 1, receiving cavity 11, strip groove 12, wear-resistant sleeve 13, handle 2, storage cavity 21, plug 22, positioning seat 3, positioning hole 31, mounting hole 32, low positioning piece 33, high positioning piece 34, ejector pin 4, screw 5, cavity 51, rear section 52, front section 53, support column 6, anti-slip sleeve 7, ball bearing 8, long rod 9. Detailed Implementation

[0023] The following specific embodiments illustrate the detailed implementation of this utility model. Those skilled in the art can easily understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented in other different ways, that is, different modifications and changes can be made without departing from the scope disclosed in this utility model.

[0024] The left, right, front, and rear directions in this embodiment are described according to the positions in the accompanying drawings and are not intended to limit the scope of protection of this utility model.

[0025] Example: A novel chain cutter, such as Figs. 1 to 3 As shown, the chain cutter includes a main body 1, a handle 2, a positioning seat 3, a pin 4, a screw 5, a support column 6, an anti-disengagement sleeve 7, and a ball bearing 8. The main body has an axially extending receiving cavity 11 and a strip-shaped groove 12 in the middle. The positioning seat is installed at the bottom of the receiving cavity. The screw passes through the tail of the main body and enters the receiving cavity. The front end of the screw has a cavity 51. The tail of the pin is inserted into the cavity, and the pin is installed on the front end of the screw by the anti-disengagement sleeve. The ball bearing is located in the cavity and abuts against the tail of the pin and the bottom of the cavity. The front end of the pin is aligned with the strip-shaped groove. The support column is installed on the main body, and its upper end forms a support fulcrum for the pin, providing support during the translation of the pin and preventing the pin from being suspended for a long distance and shifting its position, thus affecting the cutting effect.

[0026] The upper end of the handle is mounted on the bottom of the main body; the positioning seat is provided with several pairs of chain positioning plates for left and right positioning.

[0027] In this embodiment, a long rod 9 is fixedly connected to the tail of the screw, and the long rod is perpendicular to the length direction of the main body. This makes the process of cutting the chain more convenient, less strenuous, and easier to operate.

[0028] In the embodiment, the screw rod 5 is provided with a rear threaded section 52 and a front threaded section 53, the rear threaded section of the screw rod is threadedly connected with the main body, and the anti-coming-off sleeve is also threadedly connected with the front threaded section of the screw rod. This structure makes it convenient to replace the top pin after the top pin is worn out, the anti-coming-off sleeve is screwed off, a new top pin is replaced, and then the anti-coming-off sleeve is screwed again, so that the whole operation process is simple and convenient.

[0029] In the embodiment, the positioning seat 3 is provided with a positioning hole 31 and a mounting hole 32, the support column passes through the positioning hole and is fixed at the lower end of the main body, and the positioning seat is fixedly mounted on the main body through a fastener (not shown in the figure) passing through the mounting hole. In addition to the support function mentioned above, the support column can also play a positioning role when the positioning seat is installed, the positioning hole of the positioning seat is first aligned with the positioning column, and then the positioning seat is locked on the main body through the fastener, so that the positioning and installation of the positioning seat are facilitated. Since the positioning seat is a wear part, the above structure and fixing mode also facilitate replacement of a new positioning seat after the positioning seat is worn out.

[0030] In the embodiment, the positioning piece includes two low positioning pieces 33 and two high positioning pieces 34, the two low positioning pieces are located at the middle position of the positioning seat, and the two high positioning pieces are located outside the two low positioning pieces. The height of the low positioning piece is less than the height of the high positioning piece.

[0031] The positioning seat is provided with a plurality of positioning pieces, the positioning of the chain can be realized by aligning the gap between the chain links with the positioning pieces, the two low positioning pieces in the middle mainly play a positioning role, and the two high positioning pieces on the two sides mainly play a supporting role, so that the middle position of the chain is prevented from being bulged upward, and better positioning and deviation prevention are achieved.

[0032] In the embodiment, the strip-shaped groove is provided with a wear-resistant sleeve 13. The wear-resistant sleeve is a wear part, which is directly contacted with the pin shaft of the chain and is easily worn during use, so that the wear part can be directly replaced when worn, and the main body or even the chain cutter does not need to be replaced, so that the cost is reduced.

[0033] In the embodiment, the inside of the handle is provided with a storage cavity 21, a spare top pin is arranged in the storage cavity, and a plug 22 is arranged in the mouth of the storage cavity. The spare top pin is conveniently placed in the storage cavity, the space is designed more reasonably, the whole chain cutter is more beautiful, the shape and overall proportion of the handle are designed according to ergonomics, and the user experience is improved.

[0034] The working process and working principle of the utility model are as follows:

[0035] The positioning piece of the chain insertion positioning seat is positioned on the chain, that is, the positioning piece is inserted from the gap between the adjacent chain links of the chain, then one hand holds the handle, the other hand rotates the long rod, and the screw rod, the anti-escape sleeve and the ball are rotated and axially translated, since the ball is simultaneously abutted against the bottom of the cavity and the tail of the ejector pin, the ejector pin is axially translated forward, at this time, the ball and the tail of the ejector pin are in rolling friction, the friction force is small, so that the ejector pin only axially translates and does not rotate, with the translation of the ejector pin, the pin shaft on the chain is slowly ejected, so that the chain is cut off. The traditional chain cutter rotates while the ejector pin translates, so that there is a large friction force between the front end of the ejector pin and the pin shaft, the pin shaft is easily damaged, and the front end of the ejector pin is also easily worn.

[0036] The above merely describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or direct or indirect application in other related technical fields by using the content of the present application specification and drawings is also included in the patent protection range of the present application.

Claims

1. A new chain catcher characterized in that: The chain cutter comprises a main body (1), a handle (2), a positioning seat (3), a thimble (4), a screw rod (5), a supporting column (6), an anti-off sleeve (7) and a ball (8), an axially extending accommodating cavity (11) and a strip-shaped slot (12) are formed in the middle position of the main body, the positioning seat is installed at the bottom of the accommodating cavity, the screw rod passes through the tail of the main body and enters the accommodating cavity, the front end of the screw rod is provided with a cavity (51), the tail of the thimble is inserted into the cavity, and the thimble is installed at the front end of the screw rod through the anti-off sleeve, the ball is located in the cavity and abuts against the tail of the thimble and the bottom of the cavity; the front end of the thimble is aligned with the strip-shaped slot; the supporting column is installed at the main body and forms a supporting fulcrum with the thimble at the upper end; The upper end of the handle is installed at the bottom of the main body; the positioning seat is provided with a plurality of positioning pieces for positioning the left and right chains.

2. The new chain catcher according to claim 1, characterized in that: The tail of the screw rod is fixedly connected with a long rod (9), and the long rod is perpendicular to the length direction of the main body.

3. The new chain catcher according to claim 1, characterized in that: The screw rod (5) is provided with a rear section (52) with threads and a front section (53) with threads, the rear section of the screw rod is threadedly connected with the main body, and the front section of the screw rod is also threadedly connected with the anti-off sleeve.

4. The new chain catcher of claim 1, wherein: The positioning seat (3) is provided with a positioning hole (31) and a mounting hole (32), the supporting column passes through the positioning hole and is fixedly connected with the main body at the lower end, and the positioning seat is fixedly installed on the main body through a fastener passing through the mounting hole.

5. The new chain catcher of claim 1, wherein: The positioning pieces comprise two low positioning pieces (33) and two high positioning pieces (34), the two low positioning pieces are located at the middle position of the positioning seat, and the two high positioning pieces are located outside the two low positioning pieces.

6. The new chain catcher of claim 1, wherein: The strip-shaped slot is provided with a wear-resistant sleeve (13).

7. The new chain catcher of claim 1, wherein: The handle is internally provided with a storage cavity (21), a spare thimble is arranged in the storage cavity, and a plug (22) is arranged in the mouth of the storage cavity.

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