Internal expansion type clamp for bicycle seat tube

Abstract

The utility model discloses a bicycle seat tube internal expansion type clamp which comprises a hollow rod, a push-pull rod is arranged in the hollow rod, the push-pull rod and the hollow rod are coaxially arranged, one end of the push-pull rod is fixedly connected with a push-press block, one end of the hollow rod rotates a rotating ring, and the side, away from the hollow rod, of the rotating ring is fixedly connected with a carrying frame. Round holes are formed in the top and the bottom of the carrying frame, the carrying frame is sleeved with a vertical rod through the round holes, the vertical rod can move up and down through the round holes, and one end of the vertical rod is fixedly connected with an arc-shaped block. According to the seat post clamping device, the spring and the telescopic column are used in cooperation, the vertical rod and the arc-shaped block can be reset, the seat post can be taken down from the hollow rod conveniently, the seat post clamping device can clamp the seat post conveniently, the structure is simple, the manufacturing cost is low, the carrying frame can be rotated through the rotating ring, the position of a supporting point can be conveniently adjusted in cooperation with stretching and retracting of the telescopic pipe, and the use is convenient. The device can be suitable for different types of seat tubes, and the applicability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, in particular to an internal expansion clamp for a bicycle seat tube. Background Art

[0002] A fixture is a device used to fix the object to be processed in the mechanical manufacturing process so that it occupies the correct position for construction or inspection. It is also called a fixture. In a broad sense, any device used to quickly, conveniently and safely install the workpiece in any process of the process can be called a fixture. The seat tube internal expansion fixture is one of the many fixtures. It is mainly used to fix the bicycle seat tube to facilitate the processing of the outer side of the bicycle seat tube.

[0003] The patent application publication number CN219521875U discloses an internal expansion hydraulic clamp. The utility model includes a fixed flange ring, the upper side of the fixed flange ring is fixedly connected to a limit slot ring, the upper side of the limit slot ring is fixedly connected to a cross limit sleeve, the internal movable sleeve of the cross limit sleeve is provided with a T-shaped telescopic sleeve, the intermediate movable sleeve of the T-shaped telescopic sleeve, the fixed flange ring, the limit slot ring and the cross limit sleeve is provided with the same axial rear pull rod, the inner wall of the horizontal part of the T-shaped telescopic sleeve is provided with the same push groove on the opposite side, the push groove is fixedly connected to a push round block, and the lower side of the push round block is fixedly connected to the upper side of the axial rear pull rod. When the utility model is in use, the hydraulic rod telescopically drives the axial rear pull rod, which is simple and labor-saving to operate, can ensure that the workpiece is fully clamped, avoid the phenomenon of the workpiece falling off during processing, and ensure the safety during processing.

[0004] However, the internal expansion hydraulic clamp provided in the above technical solution still has many disadvantages in actual use. For example, the clamping by the hydraulic cylinder makes the structure complicated and the manufacturing cost increased. In addition, when fixing the pipeline, it is not convenient to adjust the position of the support point according to the actual situation, resulting in poor applicability. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] The internal expansion clamp of a bicycle seat tube comprises a hollow rod, a push-pull rod is arranged inside the hollow rod, and the push-pull rod is coaxially arranged with the hollow rod, one end of the push-pull rod is fixedly connected with a pushing block, one end of the hollow rod rotates a rotating circle, and the side of the rotating circle away from the hollow rod is fixedly connected with a carrier frame, the top and bottom of the carrier frame are both provided with circular holes, the carrier frame is sleeved with vertical rods through the circular holes, and the vertical rod can move up and down through the circular holes, one end of the vertical rod is fixedly connected with an arc block, the other end of the vertical rod is fixedly connected with a movable block, and the opposite surface of the movable block and the pushing block can be fitted, the two ends of the movable block are also fixedly connected with telescopic columns, and the end of the telescopic column away from the movable block is fixedly connected to the carrier frame, the vertical rod on the same side and the two telescopic columns are fixedly connected on the same plane of the same movable block, and a spring is also sleeved on the outside of the telescopic column.

[0008] Preferably, a surface of the arc block away from the vertical rod is a convex arc surface structure, and evenly distributed anti-slip grooves are provided on the arc surface of the arc block, and the vertical center line of the arc block coincides with the center axis of the vertical rod.

[0009] Preferably, the structure of the pushing block is any one of a truncated cone, a cone, a prism or a pyramid, and the pushing block coincides with the central axis of the push-pull rod.

[0010] Preferably, one end of the push-pull rod away from the pushing block is rotatably connected to a connecting block, and a sliding block is fixedly connected to the top of the connecting block.

[0011] Preferably, the bottom surface of the sliding block is in contact with the top surface of the hollow rod, and a notch is provided on the top of the hollow rod for the connection block to move, and the connection block passes through the notch to connect with the sliding block.

[0012] Preferably, racks are fixedly connected on both sides of the notch of the hollow rod, telescopic rods are fixedly connected at both ends of the slider, and cards that can be engaged with the racks are fixedly connected on both sides of the telescopic rod, and the engagement of the cards with the racks can fix the slider.

[0013] Preferably, one end of the hollow rod away from the rotating circle is fixedly connected to a telescopic tube, the other end of the telescopic tube is fixedly connected to a mounting plate, and the mounting plate is provided with threaded holes evenly distributed in an annular shape.

[0014] Beneficial Effects

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model slides the slider in the direction of the carrier frame and cooperates with the use of the connecting block to enable the pushing block to move toward the carrier frame, squeeze the movable blocks on both sides of the pushing block, so that the movable block and the vertical rod move outward, and the arc block can be pressed against the tube wall of the seat tube with different calibers, so that the seat tube is fixed, and the slider is moved in the direction of the mounting plate, and the pushing block can be drawn out of the carrier frame, and the vertical rod and the arc block can be reset by using the spring and the telescopic column, so that the seat tube is convenient to remove from the hollow rod, so that the device is convenient to clamp the seat tube, has a simple structure and low manufacturing cost, and the carrier frame can be rotated by the rotating circle, and the position of the support point can be conveniently adjusted in cooperation with the telescopic tube, so that the device can be suitable for different types of seat tubes, thereby improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0018] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the push block of the utility model;

[0020] Figure 4 It is a schematic diagram of the overall side view structure of the utility model;

[0021] Figure 5 It is a schematic diagram of the overall rear view structure of the utility model.

[0022] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0023] 1. Hollow rod; 2. Push-pull rod; 3. Push block; 4. Rotating circle; 5. Carrying frame; 6. Vertical rod; 7. Arc block; 8. Movable block; 9. Telescopic column; 10. Spring; 11. Anti-slip groove; 12. Connecting block; 13. Slider; 14. Rack; 15. Telescopic rod; 16. Card; 17. Telescopic tube; 18. Mounting plate. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0027] See also Figure 1-5 The utility model provides an embodiment of a bicycle seat tube internal expansion clamp, comprising a hollow rod 1, a push-pull rod 2 is arranged inside the hollow rod 1, and the push-pull rod 2 is coaxially arranged with the hollow rod 1, and one end of the push-pull rod 2 is fixedly connected to a push block 3. In this embodiment, the structure of the push block 3 is any one of a truncated cone, a cone, a prism or a pyramid, and the push block 3 coincides with the central axis of the push-pull rod 2, one end of the hollow rod 1 rotates a rotating circle 4, and the side of the rotating circle 4 away from the hollow rod 1 is fixedly connected to a carrier frame 5, and the top and bottom of the carrier frame 5 are both provided with circular holes, and the carrier frame 5 is sleeved with a vertical rod 6 through the circular hole, and the vertical rod 6 can move up and down through the circular hole, and one end of the vertical rod 6 is fixedly connected to an arc block 7. In this embodiment, the side of the arc block 7 away from the vertical rod 6 is a convex arc surface structure, and the arc surface of the arc block 7 is provided with uniformly distributed anti-slip grooves 11. The arc surface structure of the arc block 7 can make The arc block 7 fits better with the inner wall of the seat tube, and the vertical center line of the arc block 7 coincides with the central axis of the vertical rod 6. The other end of the vertical rod 6 is fixedly connected with a movable block 8, and the opposite surface of the movable block 8 and the pushing block 3 can be fitted. The two ends of the movable block 8 are also fixedly connected with telescopic columns 9, and the end of the telescopic column 9 away from the movable block 8 is fixedly connected to the carrier frame 5. The vertical rod 6 and the two telescopic columns 9 on the same side are fixedly connected on the same plane of the same movable block 8. The outer side of the telescopic column 9 is also sleeved with a spring 10. The coordinated use of the spring 10 and the telescopic column 9 can reset the vertical rod 6 and the arc block 7, which is convenient for removing the seat tube from the hollow rod 1, so that the device is convenient for clamping the seat tube, has a simple structure and low manufacturing cost, and the frame 5 can be rotated by the rotating circle 4, which can facilitate the adjustment of the support point position, so that the device can be suitable for different types of seat tubes, thereby improving the applicability of the device.

[0028] In this embodiment, one end of the push-pull rod 2 away from the pushing block 3 is rotatably connected to a connecting block 12, and a slider 13 is fixedly connected to the top of the connecting block 12. Furthermore, the bottom surface of the slider 13 fits with the top surface of the hollow rod 1, and a slot is provided on the top of the hollow rod 1 for the connecting block 12 to move. The connecting block 12 passes through the slot and is connected to the slider 13. Through the sliding of the slider 13 and the use of the connecting block 12, the push-pull rod 2 can be pushed and pulled.

[0029] Furthermore, racks 14 are fixedly connected on both sides of the notch of the hollow rod 1, telescopic rods 15 are fixedly connected on both ends of the slider 13, and cards 16 that can be engaged with the rack 14 are fixedly connected on both sides of the telescopic rod 15, and the engagement of the card 16 with the rack 14 can fix the slider 13. The telescopic rod 15 is used to pull the card 16 toward the outside of the hollow rod 1 so that the card 16 is removed from the rack 14, and the card 16 is inserted into the rack 14 to fix the slider 13.

[0030] Furthermore, one end of the hollow rod 1 away from the rotating circle 4 is fixedly connected to a telescopic tube 17, and the other end of the telescopic tube 17 is fixedly connected to a mounting plate 18, and the mounting plate 18 is provided with threaded holes evenly distributed in a ring shape. Through the threaded holes on the mounting plate 18, in conjunction with the use of external bolts, the device can be fixed to an external processing machine, and the bicycle seat tube to be processed is sleeved on the hollow rod 1. According to the length of the seat tube, the length of the device can be adjusted by using the telescopic tube 17, so that the device is suitable for seat tubes of different lengths.

[0031] Working principle: When using the device, first, through the threaded holes on the mounting plate 18, in conjunction with the use of external bolts, the device can be fixed to an external processing machine, and the bicycle seat tube to be processed is sleeved on the hollow rod 1. According to the length of the seat tube, the length of the device can be adjusted by using the telescopic tube 17, so that the device is suitable for seat tubes of different lengths. The card 16 is pulled outward from the hollow rod 1 by using the telescopic rod 15, so that the card 16 is disengaged from the rack 14, and the slider 13 is slid toward the direction of the carrier frame 5 in conjunction with the use of the connecting block 12, so that the pushing block 3 moves toward the carrier frame 5, and the movable blocks 8 on both sides of the pushing block 3 are squeezed, so that the movable block 8 and the vertical rod 6 move outward, and the arc block 7 can be connected with different calibers. The seat tube wall is pressed to fix the seat tube. The anti-skid groove 11 can play an anti-skid role when supporting and fixing. Inserting the card 16 into the rack 14 can fix the slider 13 to ensure the stability of the arc block 7 support. Moving the slider 13 toward the mounting plate 18 can pull the push block 3 out of the carrier frame 5. The spring 10 and the telescopic column 9 can be used in combination to reset the vertical rod 6 and the arc block 7, which is convenient for removing the seat tube from the hollow rod 1, making it convenient for the device to clamp the seat tube, with a simple structure and low manufacturing cost. The rotating circle 4 can be used to rotate the carrier frame 5, which can facilitate the adjustment of the support point position, so that the device can be suitable for different types of seat tubes, thereby improving the applicability of the device.

[0032] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A bicycle seat tube internal expansion clamp, comprising a hollow rod (1), characterized in that: A push-pull rod (2) is arranged inside the hollow rod (1), and the push-pull rod (2) is arranged coaxially with the hollow rod (1); one end of the push-pull rod (2) is fixedly connected to a push block (3); a rotating ring (4) is rotatably arranged at one end of the hollow rod (1); a carrier frame (5) is fixedly connected to the side of the rotating ring (4) away from the hollow rod (1); circular holes are opened at the top and bottom of the carrier frame (5); a vertical rod (6) is sleeved on the carrier frame (5) through the circular hole; the vertical rod (6) can move up and down through the circular hole; the vertical rod (6) One end is fixedly connected to an arc block (7), the other end of the vertical rod (6) is fixedly connected to a movable block (8), and the movable block (8) and the opposite surface of the push block (3) can be fitted, the movable block (8) is also fixedly connected to a telescopic column (9) parallel to the vertical rod (6), and the end of the telescopic column (9) away from the movable block (8) is fixedly connected to the carrier frame (5), the vertical rod (6) and the two telescopic columns (9) on the same side are fixedly connected on the same plane of the same movable block (8), and the outer side of the telescopic column (9) is also sleeved with a spring (10).

2. The bicycle seat tube internal expansion clamp according to claim 1, characterized in that: The side of the arc block (7) away from the vertical rod (6) is a convex arc surface structure, and evenly distributed anti-slip grooves (11) are provided on the arc surface of the arc block (7), and the vertical center line of the arc block (7) coincides with the center axis of the vertical rod (6).

3. The bicycle seat tube internal expansion clamp according to claim 1, characterized in that: The structure of the push block (3) is any one of a truncated cone, a cone, a prism or a pyramid, and the central axis of the push block (3) coincides with that of the push-pull rod (2).

4. The bicycle seat tube internal expansion clamp according to claim 3, characterized in that: One end of the push-pull rod (2) away from the push block (3) is rotatably connected to a connecting block (12), and a sliding block (13) is fixedly connected to the top of the connecting block (12).

5. The bicycle seat tube internal expansion clamp according to claim 4, characterized in that: The bottom surface of the slider (13) fits the top surface of the hollow rod (1), and a notch is provided on the top of the hollow rod (1) for the connection block (12) to move, and the connection block (12) passes through the notch and is connected to the slider (13).

6. The bicycle seat tube internal expansion clamp according to claim 5, characterized in that: Racks (14) are fixedly connected to both sides of the notch of the hollow rod (1), telescopic rods (15) are fixedly connected to both ends of the slider (13), and cards (16) that can be engaged with the racks (14) are fixedly connected to both sides of the telescopic rod (15), and the cards (16) are engaged with the racks (14) to fix the slider (13).

7. The bicycle seat tube internal expansion clamp according to claim 1, characterized in that: One end of the hollow rod (1) away from the rotating circle (4) is fixedly connected to a telescopic tube (17), and the other end of the telescopic tube (17) is fixedly connected to a mounting plate (18), and the mounting plate (18) is provided with threaded holes evenly distributed in an annular shape.

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