Eccentric cotter pin

Abstract

The utility model discloses an eccentric cotter pin which comprises a pin disc, a positioning block is arranged on the left side face of the pin disc in a protruding mode, and a connecting piece is horizontally connected to the center of the positioning block. The distances from the central point of the connecting piece to the upper end edge and the lower end edge of the positioning block are the same, so that the height of the central point of the connecting piece is not changed when the positioning block is overturned up and down by 180 degrees; a cylindrical shaft used for penetrating through a pulley is connected outside the connecting piece in a wrapping mode, the upper end edge of the positioning block is equal to the top of the outer surface of the cylindrical shaft in height, and a height difference is reserved between the bottom of the outer surface of the cylindrical shaft and the lower end edge of the positioning block. The tool rest has the advantages of being low in cost, simple in structure, capable of achieving a speed sliding mode and a speed pile mode on one tool rest and the like.

Description

Technical Field

[0001] The utility model relates to a nail, more specifically, to an eccentric nail, belonging to the field of roller skating devices. Background Art

[0002] In the current roller skate market, there's a clear distinction between speed skating and speed sleds. Competitors are required to prepare two types of sleds for different events: a skating sled and a speed sled. Each has its own unique characteristics and applications. The characteristics of speed skating sleds include: 1) High speed: One of the primary goals of speed skating sled design is to provide high-speed skating capabilities; 2) High stability: To ensure stability during high-speed skating, speed skating sleds typically utilize large wheels (e.g., 125mm) and a longer sled length (typically 12.5-13.0 inches, or 318-330mm); 3) Good traction: The wheel size and arrangement of speed skating sleds help reduce resistance and stalling during skating, thereby improving traction; 4) Application scenarios: Speed ​​skating sleds are primarily used for long-distance, high-speed roller skating competitions and training, such as marathon skating and speed skating; 5) Structure: Speed ​​skating sleds typically come with a 195mm hole spacing upper shoe to accommodate the large wheels. The tool holder is mostly made of metal to ensure sufficient strength and stability.

[0003] Features of the speed skewer rack: 1) Fast speed: The speed skewer rack also requires fast sliding ability to meet the needs of fast movement in competitions with short distances between poles and frequent changes of direction; 2) High flexibility: In order to improve flexibility in complex pole positions, the speed skewer rack usually uses smaller wheels (such as 110mm) and shorter rack lengths (usually 9.2-9.8 inches, i.e. 234-248mm); 3) Adjustability: The wheels of the speed skewer rack can be adjusted to a banana wheel configuration (such as 110 / 110 / 100 or 105 / 110, etc.) according to personal needs to enhance flexibility and stability when changing direction. Applicable scenarios: The speed skewer rack is mainly used for freestyle roller skating. Speed ​​sled rigs are commonly used for sled skating, such as trick sleds and speed sleds. 4) Structure: Speed ​​sled rigs are typically paired with 150 or 165mm hole spacing shoes to accommodate smaller wheels. They are also mostly made of metal, but may feature a lighter design to reduce overall weight and increase flexibility.

[0004] To sum up, there is a clear difference between speed skating blade holders and speed sled blade holders. Athletes need to prepare two blade holders when participating in different competitions. It is too cumbersome to change the blade holders when performing different events. Therefore, it is an inevitable trend to develop a product that can realize the functions of speed skating and speed sled at the same time on the same blade holder. Utility Model Content

[0005] In order to solve the above-mentioned problems in the prior art, the utility model provides an eccentric nail with technical characteristics such as low cost, simple structure, and the ability to realize a speed sliding mode and a speed pile mode on a pair of tool holders.

[0006] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0007] The utility model discloses an eccentric nailing device, comprising a nail plate, a positioning block protruding from the left side of the nail plate, a connecting piece horizontally connected to the center of the positioning block, and the distance from the center point of the connecting piece to the upper end and the lower end of the positioning block is the same so that the height of the center point of the connecting piece remains unchanged when the positioning block is flipped 180 degrees up and down;

[0008] The connecting piece is externally wrapped with a cylindrical shaft for passing a pulley, the upper edge of the positioning block is at the same height as the top of the outer surface of the cylindrical shaft, and a height difference is left between the bottom of the outer surface of the cylindrical shaft and the lower edge of the positioning block.

[0009] Preferably, the positioning block includes a middle body and an upper round head and a lower round head symmetrically connected to the upper and lower ends of the middle body, and the right end of the cylindrical shaft extends and is connected to the positioning block and coincides with the upper round head.

[0010] Preferably, the middle body, the upper round head and the lower round head are integrally formed to form an A-type flat key structure.

[0011] Preferably, the connecting member is a cylinder, and the axis of the cylindrical shaft is offset from the center line of the cylinder to achieve an eccentric arrangement between the cylinder and the cylindrical shaft.

[0012] Preferably, a gap is left between the bottom of the outer surface of the cylinder and the bottom of the outer side of the cylindrical axis.

[0013] Preferably, the nail plate, positioning block, connecting piece and cylindrical shaft are integrally formed.

[0014] Preferably, the right end of the cylinder is provided with an internal threaded hole, and a screw can be threadedly connected in the internal threaded hole.

[0015] Preferably, the right end of the cylinder protrudes out of the left end of the cylindrical shaft to form a penetration portion.

[0016] Preferably, the height difference between the bottom of the outer surface of the cylindrical shaft and the lower end edge of the positioning block is 2.1 mm.

[0017] Preferably, the diameter of the nail plate 1 is 12.5 mm, the distance from the center of the cylinder to the upper edge of the positioning block is 4.7 mm; the distance from the left end of the cylinder to the right end face of the nail plate is 32.2 mm, the distance from the left end of the cylindrical shaft to the right end face of the nail plate is 27.9 mm, the straightness of the cylinder is 6 mm, and a gap of 0.4 mm is left between the bottom of the outer surface of the cylinder and the bottom of the outside of the cylindrical shaft to facilitate machining of the cylinder.

[0018] Beneficial effects: The rotating installation of the eccentric nail in this application can realize speed skating mode and speed pile mode on a pair of tool holders; low cost, simple structure, simple mode conversion, and easy operation; there is no need to prepare two tool holders when participating in different projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a sectional view of the overall structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the structure division of the utility model

[0021] Figure 3 This is a diagram of the eccentric nail insertion state in the speed skating mode of the utility model.

[0022] Figure 4 This is a diagram of the eccentric nail penetration state in the fast pile mode of the utility model.

[0023] Figure 5 This is a structural diagram of a nail plate of the present utility model.

[0024] Figure 6 It is a top view of the nail plate of the present utility model.

[0025] Figure 7 This is a schematic diagram of the eccentric threading installation in the speed skating mode of the utility model.

[0026] Figure 8 This is a schematic diagram of the eccentric threading installation in the quick pile mode of the utility model.

[0027] Figure 9 It is a schematic diagram of the waist-shaped hole in the tool holder of the utility model.

[0028] Figure 10 This is a top view of the positioning block of the utility model. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0030] like Figure 1-10The figure shows a specific embodiment of an eccentric nail. The eccentric nail in this application is used to be inserted into a tool holder 8 to pass through a pulley, and includes a nail plate 1. A positioning block 2 protrudes from the left side of the nail plate 1. A connecting member 3 is horizontally connected to the center of the positioning block 2. The center point of the connecting member 3 is at the same distance from the upper and lower edges of the positioning block 2 to ensure that the height of the center point of the connecting member 3 remains unchanged when the positioning block 2 is flipped 180 degrees up and down. The connecting member 3 is externally connected to a cylindrical shaft 4 for passing through the pulley. The upper edge of the positioning block 2 is at the same height as the top of the outer surface of the cylindrical shaft 4. A height difference is left between the bottom of the outer surface of the cylindrical shaft 4 and the lower edge of the positioning block 2. The height difference is the difference in height of the pulley. Near the lower end of the right end surface of the nail plate 1, an arrow mark is marked on the right end surface of the nail plate 1.

[0031] like Figure 7-9 As shown, a tool holder 8 is selected to be installed with three pulleys, and the tool holder 8 includes two symmetrically arranged left and right plates ( Figure 7-9 Only the left side panel is shown, and the right side panel and the top side panel are omitted). The tops of the left and right panels are connected by the top panel. The lower edges of the left and right panels are extended with corresponding protrusions 9, and corresponding mounting holes 10 are provided on the protrusions 9. The mounting holes 10 at both ends of the left panel are circular holes and have the same height. The front pulley and the rear pulley are installed through the mounting holes 10 at both ends of the left panel. Since the mounting holes 10 at both ends of the left panel are at the same height, the front pulley and the rear pulley are always in a horizontal rotation state, that is, they can contact the horizontal ground at the same time; Figure 9 As shown, the mounting hole 10 in the middle of the left side plate is a vertically arranged waist-shaped hole 11. In this application, the positioning block 2 is adapted to the waist-shaped hole 11 in size, and the mounting hole (10) corresponding to the waist-shaped hole on the right side plate is a circular hole. The above technical features of the tool holder 8 are not necessary technical features of this application, but are only used to introduce the technical solution of this application.

[0032] The following is a detailed description of the conversion between the speed skating mode and the speed pile mode in this application:

[0033] like Figure 2 、 3 7 shows the speed skating mode, at this time the eccentric nail inserted into the tool holder 8 is presented Figure 2 、 3 At this time, Figure 8 As shown, the arrowhead is pointing upwards, the positioning block 2 is embedded in the waist-shaped hole 11 on the left side plate, the nail plate 1 is attached to the left side plate to limit the position, and the end (through-set portion) of the cylinder (connector 3) is inserted into the mounting hole in the middle of the right side plate, and Figure 1 As shown, it is locked and fixed by screws 7. After the middle pulley is sleeved on the cylindrical shaft 4, the middle pulley, the front pulley and the rear pulley are at the same height, that is, they can touch the horizontal ground at the same time;

[0034] For example Figure 2 、 4 8 shows the quick pile mode, at this time, the eccentric nail inserted into the tool holder 8 is presented Figure 4 As shown, Figures 3 and 4 Changes: Disconnect the screw 7 from the cylinder (connector 3), then detach the positioning block 2 from the waist-shaped hole 11, flip the eccentric through-nail 180 degrees up and down, and then insert the eccentric through-nail. The positioning block 2 is embedded in the waist-shaped hole 11 on the left side plate. Since the distance from the center point of the connector 3 to the upper and lower ends of the positioning block 2 is the same, the height of the center point of the connector 3 remains unchanged after rotation. Therefore, the end of the cylinder (connector 3) can still accurately pass through the mounting hole in the middle of the right side plate. At this time, the key to achieving the beneficial effects of the present application is that the height change of the cylindrical shaft 4 will drive the middle pulley on the cylindrical shaft 4 to move downward. The principle is that since the cylindrical shaft 4 is wrapped and connected to the connector 3, the upper end of the positioning block 2 is at the same height as the top of the outer surface of the cylindrical shaft 4, and there is a height difference between the bottom of the outer surface of the cylindrical shaft 4 and the lower end of the positioning block 2. This height difference is the height difference between the middle pulley and the front pulley, and the middle pulley and the rear pulley. Figure 8 As shown, the middle pulley is 2.1mm lower than the front and rear pulleys, achieving the speed pile mode. The height difference can be adjusted according to actual needs and designed according to actual competition needs. This application does not impose specific restrictions.

[0035] A preferred embodiment is as follows: Figure 2 、 10 As shown, the positioning block 2 includes a central body and upper and lower round heads 5 symmetrically connected to the upper and lower ends of the central body. The right end of the cylindrical shaft 4 extends and connects to the positioning block 2 and overlaps with the upper round head, resulting in a simple structure and strong practicality. In this application, the positioning block 2 can also be a rectangular block, and the corresponding hole in the tool holder 8 is a rectangular hole. The specific variation can be adjusted and designed according to actual needs.

[0036] In a preferred embodiment, the middle body, the upper round head, and the lower round head 5 are integrally formed to form an A-type flat key structure, which is structurally stable.

[0037] In a preferred embodiment, the connecting member 3 is a cylinder, and the axis of the cylindrical shaft 4 is offset from the centerline of the cylinder to achieve an eccentric arrangement between the cylinder and the cylindrical shaft 4. The eccentric design in this application can maintain the axis of the connecting member 3 when rotating 180 degrees up and down for eccentric nailing. When the axis of the connecting member 3 changes, the axis center of the cylindrical shaft 4 increases or decreases, thereby driving the height change of the middle pulley.

[0038] In a preferred embodiment, a gap is left between the bottom of the outer surface of the cylinder and the bottom of the outside of the cylindrical shaft 4. The design of the gap facilitates tool movement when machining the portion of the cylinder extending outside the cylindrical shaft 4.

[0039] In a preferred embodiment, the nail plate 1, the positioning block 2, the connecting piece 3, and the cylindrical shaft 4 are integrally formed and processed, and the structure is stable.

[0040] In a preferred embodiment, the right end of the cylinder is provided with an internal threaded hole 6, into which a screw 7 can be threadedly connected, which has a simple structure, is easy to install, and is highly practical.

[0041] In a preferred embodiment, a right end of the cylinder protrudes out of the left end of the cylindrical shaft 4 to form a penetration portion, which is used to penetrate the mounting hole on the tool holder 8.

[0042] In a preferred embodiment, the height difference between the bottom of the outer surface of the cylindrical shaft 4 and the lower end edge of the positioning block 2 is 2.1 mm, which is based on the needs of current competition events. This application does not limit the specific size.

[0043] In a preferred embodiment, the diameter of the nail plate 1 is 12.5 mm, the distance from the center of the cylinder to the upper edge of the positioning block 2 is 4.7 mm; the distance from the left end of the cylinder to the right end face of the nail plate 1 is 32.2 mm, the distance from the left end of the cylindrical shaft 4 to the right end face of the nail plate 1 is 27.9 mm, the diameter of the cylinder is 6 mm, and a gap of 0.4 mm is left between the bottom of the outer surface of the cylinder and the bottom of the outer surface of the cylindrical shaft 4 to facilitate machining of the cylinder. The above dimensions belong to a specific embodiment of this application, and this application does not limit the specific dimensions.

[0044] Finally, it should be noted that the present invention is not limited to the above embodiments and may be subject to many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered to be within the scope of protection of the present invention.

Claims

1. An eccentric nail, characterized by: The invention comprises a nail plate (1), a positioning block (2) protruding from the left side of the nail plate (1), a connecting piece (3) being horizontally connected to the center of the positioning block (2), and the distances from the center point of the connecting piece (3) to the upper end and the lower end of the positioning block (2) being the same so that the height of the center point of the connecting piece (3) remains unchanged when the positioning block (2) is flipped 180 degrees up and down; The connecting member (3) is externally connected to a cylindrical shaft (4) for passing a pulley, the upper edge of the positioning block (2) is at the same height as the top of the outer surface of the cylindrical shaft (4), and a height difference is left between the bottom of the outer surface of the cylindrical shaft (4) and the lower edge of the positioning block (2).

2. The eccentric nail according to claim 1, characterized in that: The positioning block (2) comprises a middle body and an upper round head and a lower round head (5) symmetrically connected to the upper and lower ends of the middle body; the right end of the cylindrical shaft (4) extends and connects to the positioning block (2) and overlaps with the upper round head.

3. The eccentric nail according to claim 2, characterized in that: The middle body, the upper round head and the lower round head (5) are integrally formed and form an A-type flat key structure.

4. The eccentric nail according to claim 1, characterized in that: The connecting member (3) is a cylinder, and the axis of the cylindrical shaft (4) is offset from the center line of the cylinder to achieve an eccentric arrangement between the cylinder and the cylindrical shaft (4).

5. The eccentric nail according to claim 4, characterized in that: A gap is left between the bottom of the outer surface of the cylinder and the bottom of the outside of the cylindrical shaft (4).

6. An eccentric nail according to claim 1, 2, 3, 4 or 5, characterized in that: The nail plate (1), the positioning block (2), the connecting piece (3), and the cylindrical shaft (4) are integrally formed.

7. The eccentric nail according to claim 4, characterized in that: An internal threaded hole (6) is provided at the right end of the cylinder, and a screw (7) can be threadedly connected in the internal threaded hole (6).

8. An eccentric nail according to claim 4 or 7, characterized in that: The right end of the cylinder protrudes out of the left end of the cylindrical shaft (4) to form a penetration portion.

9. The eccentric nail according to claim 1, characterized in that: The height difference between the bottom of the outer surface of the cylindrical shaft (4) and the lower end edge of the positioning block (2) is 2.1 mm.

10. The eccentric nail according to claim 4, characterized in that: The diameter of the nail plate (1) is 12.5 mm, and the distance from the center of the cylinder to the upper edge of the positioning block (2) is 4.7 mm; the distance from the left end of the cylinder to the right end face of the nail plate (1) is 32.2 mm, and the distance from the left end of the cylindrical shaft (4) to the right end face of the nail plate (1) is 27.9 mm. The diameter of the cylinder is 6 mm, and a gap of 0.4 mm is left between the bottom of the outer surface of the cylinder and the bottom outside the cylindrical shaft (4) to facilitate machining of the cylinder.

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