Speed change rear derailleur protection device

Abstract

The utility model relates to the technical field of speed change rear shifting protection, and discloses a speed change rear shifting protection device which comprises a base and a solid iron rod, the base and the solid iron rod are welded and fixed, the diameter of the solid iron rod is 6-8mm, and the solid iron rod is in a solid design and a bent design. According to the utility model, the solid iron rod is bent, the base and the solid iron rod are welded and fixed, then the solid iron rod with the diameter of 6-8 millimeters is used, the bent side surface is L-shaped, the front surface is U-shaped, the height is more than 7 millimeters, the length is 100 millimeters, and the width is 50 millimeters, and the mounting hole is formed in the base. According to the wear-resistant protective device, the base is provided with the mounting holes, the mounting grooves are formed in the base, the mounting holes can be formed in the mounting fixing holes reserved in the frame, the mounting grooves can be clamped on the rear axle roller, certain wear-resistant protective work is improved under fixing of the wear-resistant protective layer, and the overall protective capacity is well improved in the working process.

Description

Technical Field

[0001] The utility model relates to the technical field of speed-changing rear derailleur protection, in particular to a speed-changing rear derailleur protection device. Background Art

[0002] In daily life, we often need to pack some goods and then transport them. Most of the vehicles are used for long-distance transportation. Most of the vehicles have speed change function. One of the most important parts in the speed change system is the rear derailleur, which is responsible for the chain shifting on different flywheels to cope with different road conditions.

[0003] Because the packed and boxed transmission vehicles encounter bumpy roads during transportation or encounter rough loading and unloading by stevedores during loading and unloading, the rear derailleur may be partially deformed due to force, resulting in inaccurate shifting or uneven shifting, chain falling, etc., which seriously affects customer satisfaction with the vehicle. Subsequently, it will be necessary to provide a rear derailleur protection device to complete the protection of the rear derailleur. Utility Model Content

[0004] The purpose of the utility model is to provide a rear derailleur protection device to solve the problem proposed in the above background technology that a packed and boxed rear derailleur may encounter bumpy roads during transportation or rough loading and unloading by stevedores during loading and unloading, which may cause local stress deformation of the rear derailleur, resulting in inaccurate or uneven shifting, chain falling, etc., which seriously affects customer satisfaction with the vehicle.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rear derailleur protection device, comprising a base and a solid iron rod, the base and the solid iron rod are welded and fixed, the diameter of the solid iron rod is six to eight millimeters, the solid iron rod is solid in design, and the solid iron rod is bent in design.

[0006] Preferably, the side surface of the solid iron rod is L-shaped, and the front surface of the solid iron rod is U-shaped.

[0007] Preferably, the height of the solid iron rod is greater than seven millimeters, and the outer side wall of the solid iron rod is coated with an anti-corrosion layer.

[0008] Preferably, the length of the solid iron rod is one hundred millimeters, and the width of the solid iron rod is fifty millimeters.

[0009] Preferably, mounting holes are provided inside the base, and the mounting holes are symmetrically distributed about the central axis of the base.

[0010] Preferably, a mounting groove is provided inside the base, and a wear-resistant protective layer is fixed to the inner wall of the mounting groove.

[0011] Preferably, a supporting fixing layer is fixed to the top and bottom ends inside the base, a fixing seat is installed at one end of the supporting fixing layer, connecting reinforcement blocks are installed on both sides of the fixing seat, and a supporting ball is connected to the inside of the fixing seat.

[0012] Preferably, the supporting and fixing layers are symmetrically distributed about the central axis of the base, the connecting and reinforcing blocks are symmetrically distributed about the central axis of the fixing seats, and the fixing seats are evenly distributed inside the base.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the speed-changing rear derailleur protection device not only improves the protection capability, but also improves the stability of the speed-changing rear derailleur protection device;

[0014] (1) A solid iron rod is used for bending, and the base and the solid iron rod are welded and fixed. Then, a solid iron rod with a diameter of six to eight millimeters is used, and the side is bent into an L shape, the front is U-shaped, the height is more than seven millimeters, the length is one hundred millimeters, and the width is fifty millimeters. The base is welded, and a mounting hole is opened in the base, and a mounting groove is opened in the base. The mounting hole is designed to be installed on the mounting fixing hole reserved in the frame, and the mounting groove can be stuck on the rear wheel axle rod. Under the fixation of the wear-resistant protective layer, a certain wear-resistant protection work is improved, thereby better improving the overall protection ability during the working process;

[0015] (2) The supporting fixing layer is installed and fixed on the top and bottom surfaces of the base, so as to achieve the purpose of upper and lower shaping during the working process. Then, after the fixing seats are evenly distributed, support balls are used between the fixing seats for support and protection, and then the side positions are stably supported by connecting reinforcement blocks. In this way, it has better reinforcement ability during the working process and prevents deformation of the base after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a side view structural diagram of a solid iron rod of the utility model;

[0018] Figure 3 This is a schematic diagram of the top view of the base structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the base of the utility model in front view.

[0020] In the figure: 1. Base; 2. Solid iron rod; 3. Anti-corrosion layer; 4. Mounting hole; 5. Mounting groove; 6. Wear-resistant protective layer; 7. Support and fixing layer; 8. Fixed seat; 9. Connection reinforcement block; 10. Support ball. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides an embodiment: a rear derailleur protection device, comprising a base 1 and a solid iron rod 2. The base 1 and the solid iron rod 2 are welded and fixed. The diameter of the solid iron rod 2 is six to eight millimeters. The solid iron rod 2 is solid in design and is bent in design.

[0023] The side of the solid iron rod 2 is designed in an L shape, and the front of the solid iron rod 2 is designed in a U shape.

[0024] The height of the solid iron rod 2 is greater than seven millimeters, and the outer side wall of the solid iron rod 2 is coated with an anti-corrosion layer 3.

[0025] The length of the solid iron rod 2 is one hundred millimeters, and the width of the solid iron rod 2 is fifty millimeters.

[0026] The base 1 has mounting holes 4 formed inside, and the mounting holes 4 are symmetrically distributed about the central axis of the base 1 .

[0027] A mounting groove 5 is provided inside the base 1 , and a wear-resistant protective layer 6 is fixed to the inner wall of the mounting groove 5 .

[0028] A supporting fixing layer 7 is fixed to the top and bottom ends of the base 1 , a fixing seat 8 is installed at one end of the supporting fixing layer 7 , connecting reinforcement blocks 9 are installed on both sides of the fixing seat 8 , and a supporting ball 10 is connected to the inside of the fixing seat 8 .

[0029] The supporting and fixing layers 7 are symmetrically distributed about the central axis of the base 1, the connecting and reinforcing blocks 9 are symmetrically distributed about the central axis of the fixing seats 8, and the fixing seats 8 are evenly distributed inside the base 1;

[0030] Further, this design reserves a mounting hole at the rear derailleur position of the frame, and uses a solid iron rod 2 with a diameter of 6-8mm to bend the side into an L shape and the front into a U shape, with a height of more than 7mm, a length of 100mm, and a width of 50mm, and welds the base, opens holes, and slots so that it can be installed on the mounting hole reserved on the frame, and the slot can be stuck on the rear wheel axle rod;

[0031] Furthermore, this design can effectively solve the deformation of the rear derailleur caused during transportation and loading and unloading, and at the same time can enhance the strength of the hanging ear position. It itself has the characteristics of low cost and simple production.

[0032] Working principle: First, a solid iron rod 2 is bent, and at the same time, the base 1 and the solid iron rod 2 are welded and fixed. Then, a solid iron rod 2 with a diameter of six to eight millimeters is used, and the side is bent into an L shape, the front is U-shaped, the height is more than seven millimeters, the length is one hundred millimeters, and the width is fifty millimeters. The base 1 is welded, and a mounting hole 4 is opened in the base 1, and a mounting groove 5 is opened in the base 1. The mounting hole 4 is designed to be installed on the mounting and fixing hole reserved in the frame, and the mounting groove 5 can be stuck on the rear wheel axle rod, thereby completing the assembly of the base 1 and the solid iron rod 2.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A rear derailleur protection device, comprising a base (1) and a solid iron rod (2), characterized in that: The base (1) and the solid iron rod (2) are welded and fixed to each other. The diameter of the solid iron rod (2) is six to eight millimeters. The solid iron rod (2) is solid in design and is bent in design.

2. A rear derailleur protection device according to claim 1, characterized in that: The side surface of the solid iron rod (2) is designed to be L-shaped, and the front surface of the solid iron rod (2) is designed to be U-shaped.

3. A rear derailleur protection device according to claim 1, characterized in that: The height of the solid iron rod (2) is greater than seven millimeters, and the outer side wall of the solid iron rod (2) is coated with an anti-corrosion layer (3).

4. The rear derailleur protection device according to claim 1, characterized in that: The length of the solid iron rod (2) is one hundred millimeters, and the width of the solid iron rod (2) is fifty millimeters.

5. The rear derailleur protection device according to claim 1, characterized in that: The base (1) is provided with mounting holes (4) inside, and the mounting holes (4) are symmetrically distributed about the central axis of the base (1).

6. The rear derailleur protection device according to claim 1, characterized in that: The base (1) is provided with a mounting groove (5) inside, and a wear-resistant protective layer (6) is fixed to the inner wall of the mounting groove (5).

7. The rear derailleur protection device according to claim 1, characterized in that: A supporting fixing layer (7) is fixed to the top and bottom ends of the base (1), a fixing seat (8) is installed at one end of the supporting fixing layer (7), connecting reinforcement blocks (9) are installed on both sides of the fixing seat (8), and a supporting ball (10) is connected to the inside of the fixing seat (8).

8. The rear derailleur protection device according to claim 7, characterized in that: The supporting and fixing layer (7) is symmetrically distributed about the central axis of the base (1), the connecting reinforcement blocks (9) are symmetrically distributed about the central axis of the fixing seat (8), and the fixing seat (8) is evenly distributed inside the base (1).

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