Welding-free integrated brake rocker arm piece

Abstract

The welding-free integrated brake rocker arm piece comprises an integrally-formed connecting rod and an installation head arranged at the upper end of the connecting rod, an installation hole connected with a rod head of a rocker arm shaft is formed in the middle of the installation head, and a notch is formed in the position, corresponding to the upper portion of the installation hole, of the installation head. A connecting hole used for installing a fastening screw is further transversely formed in the installing head, the lower end of the connecting hole transversely penetrates through the upper portion of the installing hole, a receding groove is formed in the position, corresponding to the connecting hole, of the rod head of the rocker arm shaft, and the fastening screw transversely penetrates through the receding groove along the connecting hole. The connecting rod and the mounting head are of an integrally-formed structure, the whole rocker arm piece is free of butt joints, a zinc coating can be attached to the whole rocker arm piece, white rust and the like are prevented from corroding a workpiece in an interlayer seam, the corrosion resistance of the rocker arm piece is improved, the service life of the rocker arm piece is prolonged, and riding safety is guaranteed; and the overall strength of the rocker arm piece is also improved, so that the situation of open welding is avoided, and the overall strength of the rocker arm piece is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle braking equipment technology, specifically to a weld-free integrated brake rocker arm. Background Technology

[0002] Electric bicycles and electric tricycles, as clean energy transportation tools, are widely used in my country. The braking mechanism of these electric vehicles involves installing brake discs at the wheels. These discs are driven by a rocker arm shaft, and the rocker arm pads, as the connecting component between the rocker arm shaft and the brake cable, play a crucial role in the braking operation of the electric vehicle. Figure 1-2 As shown, currently, during the manufacturing process of brake pads, the outline of the rocker arm pad is first machined onto a steel plate. Then, the machined outline is folded in half to form the brake pad structure. This structure includes a connecting rod 1', which, after being folded, forms a mounting head 2'. The folded mounting head 2' forms a cavity 5', and a mounting hole 3' is provided in the middle of the mounting head 2'. Internal teeth 4' are provided circumferentially inside the mounting hole 3'. A through hole 6' is provided at the lower end of the connecting rod 1'. To reinforce the folded connecting rod 1', spot welding is typically performed at weld point A or simultaneously at weld points A and B, thus welding the two folded connecting rods 1' together. During assembly, as... Figure 3 As shown, the end of the rocker arm shaft 7' with the rod head 8' is inserted along the mounting hole 3'. The outer circumference of the rod head 8' is provided with external teeth, which mesh with the internal teeth of the mounting hole 3', thus allowing the two to be securely connected. Then, the screw 9' is used to pass through the entire mounting head 2' along the upper end of the cavity 5'. The part of the rod head 8' located in the mounting hole 3' is also provided with a clearance groove. When the screw 9' passes through the cavity 5', the lower end of the screw 9' will be locked in the clearance groove of the rod head 8'. Then, the end of the screw 9' is locked with the nut 10'. In this way, the rod head 8' of the rocker arm shaft 7' is fixed in the mounting hole 3', and the electric vehicle's brake cable is fixed in the through hole 6' at the lower end of the connecting rod 1'. Thus, when the brake is pulled, it will be pulled. Pulling the brake cable will in turn pull the connecting rod 1', which in turn drives the rocker arm shaft 7' to rotate inside the brake disc and control the brake pads to perform braking operations. The rocker arm pads commonly found on the market are actually folded in half and then reinforced by spot welding, resulting in poor strength. After prolonged use, the welds are prone to cracking, which will affect the normal braking operation of the electric vehicle. Furthermore, when the rocker arm pad is folded and galvanized, the interior of the joint cannot be properly galvanized for corrosion protection. With the increase in usage time, the folded part of the connecting rod 1' is prone to rust, and the resulting white rust can easily seep out along the joint, which will also greatly affect the overall strength of the rocker arm pad and may even cause safety hazards in severe cases. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a weld-free integrated brake rocker arm to solve the aforementioned technical problems.

[0004] The present invention adopts the following technical solution: a weld-free integrated brake rocker arm, comprising an integrally formed connecting rod and a mounting head disposed on the upper end of the connecting rod. The mounting head has a mounting hole in the middle that connects to the rod head of the rocker arm shaft. A notch is provided on the mounting head above the mounting hole. A connecting hole for mounting a fastening screw is also horizontally disposed on the mounting head. The lower end of the connecting hole passes through the upper part of the mounting hole. A clearance groove is provided on the rod head of the rocker arm shaft at the position corresponding to the connecting hole. The fastening screw passes through the clearance groove along the connecting hole.

[0005] Furthermore, the connecting hole is provided with an internal thread, and the fastening screw is threadedly connected to the connecting hole.

[0006] Furthermore, the mounting hole is a circular hole structure, and the structure of the rod head on the rocker arm shaft is adapted to the shape of the mounting hole.

[0007] Furthermore, the mounting hole is provided with internal teeth along the circumferential direction, and the rocker arm shaft is provided with external teeth on the rod head, the external teeth and the internal teeth meshing with each other.

[0008] Furthermore, the connecting rod is a straight rod structure, and a socket is provided at its lower end.

[0009] Furthermore, the upper part of the connecting rod is a straight rod structure, and the lower end of the connecting rod is symmetrically provided with connecting support rods that branch off to both sides. The connecting support rods are integrally formed with the connecting rods, and there is an installation gap between the connecting support rods. The connecting support rods are symmetrically provided with through holes.

[0010] The above-mentioned technical solution of this utility model has the following beneficial effects: The connecting rod and mounting head in this utility model are integrally formed structures without any butt joints. When galvanizing and anti-corrosion treatment is carried out later, the galvanized layer can adhere to the outer side of the entire rocker arm, avoiding white rust and other conditions from corroding the workpiece in the interlayer seam. This greatly improves the anti-corrosion ability of the rocker arm and also increases its service life, ensuring riding safety. In addition, the integrally formed structure also increases the overall strength of the rocker arm, preventing weld cracking and increasing the overall strength of the rocker arm. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0012] Figure 1This is a schematic diagram of the planar structure of the rocker arm plate before molding in the prior art of this utility model;

[0013] Figure 2 This is a three-dimensional structural diagram of the rocker arm plate after molding in the prior art of this utility model;

[0014] Figure 3 This is a schematic diagram of the assembly of the rocker arm plate in the prior art of this utility model;

[0015] Figure 4 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0016] Figure 5 This is a schematic cross-sectional view of the installation of an embodiment of the present utility model;

[0017] Figure 6 This is a side view of the second embodiment of the present invention. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0020] like Figure 4-5 As shown, this utility model embodiment provides a weld-free integrated brake rocker arm, including an integrally formed connecting rod 1 and a mounting head 2 disposed on the upper end of the connecting rod 1. The middle part of the mounting head 2 is provided with a mounting hole 3 that connects to the rod head 10 of the rocker arm shaft. A notch 4 is provided on the mounting head 2 above the corresponding mounting hole 3. A connecting hole 5 for mounting a fastening screw 9 is also horizontally disposed on the mounting head 2. The lower end of the connecting hole 5 passes through the upper part of the mounting hole 3. A clearance groove is provided on the rod head 10 of the rocker arm shaft at the position corresponding to the connecting hole 5. The fastening screw 9 passes through the clearance groove along the connecting hole 5.

[0021] The connecting hole 5 is provided with an internal thread 6, and the fastening screw 9 is threadedly connected to the connecting hole 5.

[0022] The connecting hole 5 is provided with an internal thread, which eliminates the need to use a nut for locking. The fastening screw 9 can be directly locked with the connecting hole 5, which greatly facilitates the assembly operation.

[0023] Mounting hole 3 is a round hole structure, and the structure of the rod head 10 on the rocker arm shaft is adapted to the shape of the mounting hole.

[0024] The mounting hole 3 has an internal tooth 7 arranged circumferentially along its inner edge, and the rocker arm shaft has an external tooth 10. The external tooth 7 and the internal tooth 7 mesh with each other.

[0025] Traditional rocker arm plates are made by cutting and folding steel plates. The internal teeth on the mounting holes are only located on the two folded plates. When the internal teeth mesh with the rod head on the rocker arm shaft, the contact area between the teeth is small, which easily leads to slippage and seriously affects the normal operation of the electric vehicle braking device. However, the internal teeth 7 described in this utility model are arranged inside the entire mounting hole 3. This increases the contact area between the internal teeth 7 and the external teeth on the rocker arm shaft, which can greatly improve the biting force between the two, improve the overall tensile strength, and prevent the teeth from slipping off.

[0026] In other embodiments, the mounting hole 3 can also be configured as a rectangular structure, and no teeth are provided in the rectangular mounting hole 3. Correspondingly, the shape of the rocker arm shaft rod head 10 is adapted to the shape of the rectangular mounting hole 3, and the clearance groove is provided at the upper end of the rectangular rod head 10.

[0027] Link 1 is a straight rod structure, and a socket 8 is provided at its lower end.

[0028] Socket 8 is connected to the brake cable of the electric vehicle.

[0029] like Figure 6 As shown, in the second embodiment, the upper part of the connecting rod 1 is a straight rod structure, and the lower end of the connecting rod 1 is symmetrically provided with connecting support rods 11 that are branched off to both sides. The connecting support rods 11 are integrally formed with the connecting rod 1, and an installation gap is provided between the connecting support rods 11. The connecting support rods 11 are symmetrically provided with through holes 12.

[0030] When assembling this utility model, firstly, the mounting hole 3 on the mounting head 2 is inserted into the rod head 10 of the rocker arm shaft. The internal teeth 7 in the mounting hole 3 mesh with the external teeth on the rod head 10. Then, the fastening screw 9 is screwed into the relief groove on the rod head 10 along the connecting hole 5 on the mounting head 2. In this way, the rocker arm plate is firmly connected to the rocker arm shaft. The insertion hole 8 at the lower end of the connecting rod 1 is connected to the brake cable. When the brake is applied, the entire rocker arm plate can be moved by pulling the brake cable, thereby pulling the rocker arm shaft to rotate in the brake disc and finally driving the brake pads in the brake disc to perform braking.

[0031] This utility model has the following advantages:

[0032] 1. The connecting rod 1 and the mounting head 2 are integrally cast, which strengthens the overall structure of the rocker arm and increases its tensile strength.

[0033] 2. The rocker arm plate does not require welding, avoiding issues such as open welds and misaligned welds, thus improving the overall quality of the rocker arm plate;

[0034] 3. The mounting hole is filled with internal teeth, which increases the contact area with the rod head on the rocker arm shaft, enhances the biting force between the teeth, improves the tensile strength of the connection between the two, and prevents the mounting hole from disengaging from the rocker arm shaft.

[0035] 4. The rocker arm has no gaps, so galvanizing can be carried out on the entire surface during the galvanizing and anti-corrosion treatment. This avoids the white rust seeping out from the interlayer at the joints, which is common with traditional rocker arm panels, and improves the overall corrosion resistance of the rocker arm.

[0036] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A weld-free, one-piece brake rocker arm, characterized in that: The device includes an integrally formed connecting rod and a mounting head disposed on the upper end of the connecting rod. The mounting head has a mounting hole in the middle that connects to the rod head of the rocker arm shaft. The mounting head has a notch at a position above the mounting hole. The mounting head also has a horizontally disposed connecting hole for mounting a fastening screw. The lower end of the connecting hole passes through the upper part of the mounting hole.

2. The weld-free integrated brake rocker arm according to claim 1, characterized in that: The connecting hole is provided with an internal thread, and the fastening screw is threadedly connected to the connecting hole.

3. The weld-free integrated brake rocker arm according to claim 1, characterized in that: The mounting hole is a circular hole structure, and the structure of the rod head on the rocker arm shaft is adapted to the shape of the mounting hole.

4. The weld-free integrated brake rocker arm according to claim 3, characterized in that: The mounting hole is provided with internal teeth along the circumferential direction, and the rocker arm shaft is provided with external teeth on the rod head. The external teeth and the internal teeth mesh with each other.

5. The weld-free integrated brake rocker arm according to claim 1, characterized in that: The connecting rod is a straight rod structure, and a socket is provided at its lower end.

6. The weld-free integrated brake rocker arm according to claim 1, characterized in that: The upper part of the connecting rod is a straight rod structure, and the lower end of the connecting rod is symmetrically provided with connecting support rods that branch off to both sides. The connecting support rods are integrally formed with the connecting rods, and there is an installation gap between the connecting support rods. The connecting support rods are symmetrically provided with through holes.

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