Oil pressure brake with function of preventing transmission rod from falling off

Abstract

An oil pressure brake with a transmission rod anti-falling function comprises a brake body, a piston rod, a brake handle and a transmission rod. A pressure cylinder chamber is formed in the brake main body; the piston rod is movably arranged in the pressure cylinder chamber in a penetrating manner; one end of the transmission rod extends into the pressure cylinder chamber to form matched connection with the piston rod, and the other end of the transmission rod is connected to the brake handle; a ball socket groove is formed in the end face of the piston rod, the transmission rod further comprises a ball head portion, and the ball head portion is rotatably embedded in the ball socket groove. A deformable necking part is further arranged at a notch of the ball socket groove, an embedding opening is further formed in the deformable necking part, and the deformable necking part at least has a contracting state and an opening state; the brake is provided with the deformable necking part, so that the piston rod and the transmission rod cannot be staggered and separated from each other when the brake is impacted slightly, and the transmission rod can be smoothly separated from the piston rod to prevent the piston rod and the transmission rod from being collided and damaged when the brake is impacted excessively, so that the brake is protected.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic brakes, in particular to a hydraulic brake with a transmission rod anti-slip function. Background Art

[0002] The brake is a device that has the function of slowing down, stopping or keeping the moving parts (or moving machinery) stopped. It is a mechanical part that stops or slows down the moving parts in the machinery. Commonly known as brakes or gates. The brake is mainly composed of a frame, brake parts and operating devices. Some brakes are also equipped with automatic adjustment devices for the clearance of brake parts. In order to reduce the braking torque and structural size, the brake is usually installed on the high-speed shaft of the equipment, but large equipment with higher safety requirements (such as mine hoists, elevators, etc.) should be installed on the low-speed shaft close to the working part of the equipment.

[0003] In vehicles such as bicycles, the device used to control the brake is the brake (commonly known as the brake handle). The brake handle is a handle used for braking. The brake handle is used in bicycle brake handles, baby stroller handles, electric vehicle brake handles, motorcycle brake handles, etc.

[0004] With the continuous improvement of technology, the brakes used in bicycles and other means of transportation on the market have gradually replaced the traditional brakes that relied on solid media such as steel wire for transmission, and have been replaced by hydraulic brakes that use liquid media such as oil as transmission media. The most representative of these is the hydraulic brake.

[0005] The principle of the hydraulic brake is to connect one end of a brake oil pipe to the output end of the internal oil circuit of a brake handle seat, and the other end of the brake oil pipe to a disc brake. The handle can be pressed to push a piston rod in the internal oil circuit, so that the pressure in the oil circuit acts on the disc brake through the brake oil pipe, thus forming the disc brake operation.

[0006] Furthermore, in the structure of existing hydraulic brakes, transmission is achieved by connecting a transmission rod between the handle and the piston rod. When the transmission rod is driven by the handle to move toward the piston rod, the transmission rod will inevitably deflect relative to the piston rod. In order to prevent the mutual deflection between the two from generating stress, a ball socket groove is generally opened on the piston rod, and then one end of the transmission rod is set to a ball head shape, so that the two can deflect at a certain angle relative to each other while transmitting.

[0007] For example, in the Chinese patent with patent number ZL202221251695.7, it is disclosed: "A hydraulic brake handle structure and a bicycle. A large piston capable of linear reciprocating motion is arranged in the cylinder body, the interior of the large piston is hollow and has a small piston capable of linear reciprocating motion arranged therein, the interior of the large piston is connected to the interior of the cylinder body, the top of the small piston is connected to the handle through a push rod, and the handle pushes the small piston to move linearly into the large piston through the push rod; a pressing mechanism is arranged between the handle and the cylinder body, and the pressing mechanism is used to be driven by the handle to push the large piston to move linearly into the cylinder body; the linear motion of the large piston into the cylinder body and the linear motion of the small piston into the large piston are started synchronously, and the linear motion stroke of the large piston into the cylinder body is smaller than the linear motion stroke of the small piston into the large piston. In the utility model, as the rotation angle of the handle gradually increases, when the large piston reaches the end of the stroke, the motion stroke of the small piston has not yet ended, which is equivalent to the cylinder diameter becoming the small piston diameter at this time, that is, the cylinder diameter becomes smaller, so the gripping force on the handle is reduced."

[0008] From the description and drawings of the above patent, it can be seen that the ball socket on the end face of the piston rod in the existing hydraulic brake is generally opened in a hemispherical shape, so that the ball head on the transmission rod can be easily fitted into the ball socket during installation. However, this structure has a serious problem, that is, when the bicycle encounters a bumpy road during use, the bicycle will be bumpy. In this case, the hydraulic brake is impacted, and the transmission rod and the piston rod inside it are easily misaligned or even separated from each other, which leads to brake failure, making the existing hydraulic brake have serious safety problems. However, if the ball head is completely sealed in the ball socket, when the bicycle collides or falls over, the hydraulic brake encounters a greater impact, and the ball head will collide violently with the inner wall of the ball socket, causing damage to both, which will also cause damage to the hydraulic brake.

[0009] Therefore, it is urgent to develop a hydraulic brake, which can ensure that when the bicycle is bumped and the brake is subjected to a small impact, the ball head will not be separated from the ball socket to cause a safety hazard; and can also ensure that when the bicycle falls over and the brake is subjected to a large impact, the ball socket can be smoothly separated from the ball socket to prevent the two from colliding and causing the brake to be damaged and scrapped. Summary of the invention

[0010] In order to overcome the deficiency in the prior art that the matching relationship between the ball head of the transmission rod of the hydraulic brake and the ball socket groove of the piston rod is not flexible and changeable enough, the utility model provides a hydraulic brake with a transmission rod anti-slip function.

[0011] The utility model solves the technical problem by providing a hydraulic brake with a transmission rod anti-slip function, comprising:

[0012] A brake body, wherein a pressure cylinder chamber is provided inside;

[0013] A piston rod movably disposed in the pressure cylinder chamber;

[0014] A brake handle, which is rotatably connected to the brake body and forms a transmission connection with the piston rod;

[0015] A transmission rod, one end of which extends into the pressure cylinder chamber to form a matching connection with the piston rod, and the other end of which is connected to the brake handle;

[0016] A ball socket groove is formed on the end surface of the piston rod, and the transmission rod further includes a ball head portion, which is rotatably embedded in the ball socket groove;

[0017] The notch of the ball socket is also provided with a deformable necking portion, the deformable necking portion is also provided with an embedding interface, and the deformable necking portion has at least a contracted state and an open state;

[0018] When the deformable necking portion is in a contracted state, the diameter of the embedding interface is smaller than the diameter of the ball head;

[0019] When the deformable necking portion is in an open state, the diameter of the embedding interface is equal to or greater than the diameter of the ball head.

[0020] The deformation mode of the deformable necking portion is further such that the deformable necking portion can produce a state change tendency under an external force, and the force has a threshold value;

[0021] When the force applied to the deformable necking portion is greater than the above threshold, the deformable necking portion switches from a contracted state to an open state;

[0022] When the force applied to the deformable necking portion is less than the threshold, the deformable necking portion switches from an open state to a contracted state or always maintains in the contracted state.

[0023] The deformation process of the deformable necking portion is further developed. The deformable necking portion also has a transition state between the open state and the contracted state. When the deformable lock buckle is subjected to an external force but the force is less than the above threshold, the deformable necking portion is in a transition state. In the transition state, the diameter of the embedding interface gradually increases but is still smaller than the diameter of the embedding interface.

[0024] During use, when the transmission rod and the piston rod are installed, the elastic deformation of the deformable necking portion enables the ball head to pass through the embedding interface and fit into the ball socket groove; and when the installation is completed and the brake is used, when the brake is impacted, the transmission rod has a tendency to move away from the piston rod, but in the process of the ball head leaving the ball socket groove, the deformable necking portion will block it, and the impact drives the transmission rod to apply a force to the deformable necking portion;

[0025] When the force is smaller than the above threshold, the ball head squeezes the deformable necking portion and switches it from a contracted state to a transitional state, but is not enough to switch it to an open state. Therefore, since the diameter of the embedding interface is still smaller than the diameter of the ball head, the ball head is restricted by the deformable necking portion and cannot escape from the ball socket. After the impact, the force on the deformable necking portion disappears and returns to a contracted state.

[0026] When the force is greater than the above threshold, the ball head squeezes the deformable necking portion and switches it directly from a contracted state to an open state, causing the diameter of the embedding interface to be larger than the diameter of the ball head. The interference between the ball head and the deformable necking portion is eliminated, and the ball head is able to detach from the ball socket through the embedding interface.

[0027] The specific structure of the deformable necking portion is further that the deformable necking portion is divided into a fitting section and an insertion section along the axial direction of the piston rod, the inner wall of the fitting portion is opened in an arc shape and abuts against the spherical surface of the ball head, and the embedding interface is opened on the insertion section.

[0028] The output method of the hydraulic oil in the pressure cylinder chamber is further that a vehicle oil pipe is connected to the brake body, the vehicle oil pipe is communicated with the pressure cylinder chamber, and the vehicle oil in the pressure cylinder chamber is squeezed by the piston rod and then output through the vehicle oil pipe.

[0029] In one arrangement of the piston rod of the utility model, the piston rod and the deformable necking portion are an integral part.

[0030] In the above-mentioned arrangement of the piston rod, the deformable necking portion is presented in such a way that the ball socket is overall arranged in a spherical shape with a single-side opening, and the arc-shaped inner wall of the fitting section is a section of the groove wall of the ball socket close to the opening.

[0031] The utility model also has another piston rod arrangement mode, wherein the piston rod is composed of a piston member and a limiting member connected together, and the deformable constricted portion of the piston rod is constituted by the limiting member.

[0032] In the above-mentioned other piston rod setting method, the deformable necking portion is presented in a manner that the ball socket is hemispherical, and the inner wall of the fitting section on the limit member is hemispherical with a single-side opening. The ball socket is connected and assembled with the inner wall of the fitting section, so that a spherical groove with a single-side opening is formed on the end face of the piston rod.

[0033] The specific connection method between the piston member and the limiting member is further that a plurality of connecting ribs are convexly provided on the end surface of the piston member with the ball socket groove, and a plurality of connecting grooves are provided on the end surface of the limiting member connected to the piston member, and the connecting ribs are embedded in the connecting grooves.

[0034] Installation method of the utility model: During the installation of the transmission rod and the piston rod in this embodiment, firstly, the ball head of the transmission rod is fitted into the embedding interface, and the transmission rod is pressed toward the ball socket, so that it applies a force to the deformable necking portion of the piston rod, and the force is greater than the above-mentioned threshold value, thereby making the deformable necking portion switch from a contracted state to an open state, and after the embedding interface is opened, the ball head of the piston rod can pass through and fit into the ball socket, and after the ball head passes through, the deformable necking portion recovers from an open state to a contracted state, and the fitting section of the deformable necking portion fits on the surface of the ball head, and at this point the transmission rod and the piston rod are connected.

[0035] The beneficial effects of the utility model are:

[0036] 1. By improving the piston rod, a deformable necking portion is formed on it. When the piston rod is connected to the transmission rod, the deformable necking portion cooperates with the ball head on the transmission rod to ensure that the piston rod and the transmission rod will not be separated from each other when the brake is subjected to a small impact. When the brake is subjected to an excessive impact, the transmission rod can be smoothly separated from the piston rod to prevent the two from being damaged by collision, thereby protecting the brake.

[0037] 2. The deformable necking portion can also be elastically deformed, so that while limiting the transmission rod, during the connection process between the transmission rod and the piston rod, the deformable necking portion can also avoid interference with the connection between the two by elastic deformation, making the installation process of the brake easier;

[0038] 3. The deformable necking portion can be presented on the piston rod in an integrated form or in a separate form, so that the specific structure and material of the deformable necking portion can be adjusted according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the utility model.

[0040] Figure 2 It is an explosion schematic diagram of the utility model.

[0041] Figure 3 It is a cross-sectional view of the first embodiment of the present utility model.

[0042] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0043] Figure 5 It is a cross-sectional view of the second embodiment of the present utility model.

[0044] Figure 6 yes Figure 5 A magnified schematic diagram of point B in the middle.

[0045] Figure 7 It is an exploded schematic diagram of the piston rod in the second embodiment of the present utility model.

[0046] Figure 8 It is a structural schematic diagram of the limiting member in the second embodiment of the utility model.

[0047] Numbers in the figure: 1. Brake body; 2. Pressure cylinder chamber; 3. Piston rod; 4. Brake handle; 5. Oil pipe; 6. Transmission rod; 7. Ball socket; 8. Ball head; 9. Deformable necking portion; 10. Embedding interface; 11. Fitting section; 12. Insertion section; 13. Piston member; 14. Limiting member; 15. Connecting rib; 16. Connecting groove. DETAILED DESCRIPTION

[0048] 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.

[0049] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0050] Embodiment 1

[0051] Combination Figures 1 to 4The hydraulic brake with a transmission rod anti-slip function shown in the figure comprises a brake body 1, a piston rod 3, a brake handle 4 and a transmission rod 6; a pressure cylinder chamber 2 is provided inside the brake body 1; the piston rod 3 is movably arranged in the pressure cylinder chamber 2; the brake handle 4 is rotatably connected to the brake body 1 and forms a transmission connection with the piston rod 3; one end of the transmission rod 6 extends into the pressure cylinder chamber 2 to form a matching connection with the piston rod 3, and the other end thereof is connected to the brake handle 4; a ball socket groove is provided on the end surface of the piston rod 3 7, and the transmission rod 6 also includes a ball head 8, and the ball head 8 is rotatably embedded in the ball socket 7; the notch of the ball socket 7 also has a deformable necking portion 9, and the deformable necking portion 9 is also provided with an embedding interface 10, and the deformable necking portion 9 has at least a contracted state and an open state; when the deformable necking portion 9 is in the contracted state, the diameter of the embedding interface 10 is smaller than the diameter of the ball head 8; and when the deformable necking portion 9 is in the open state, the diameter of the embedding interface 10 is equal to or larger than the diameter of the ball head 8.

[0052] In this embodiment, the deformable necking portion 9 can produce a state change tendency under an external force, and the force has a threshold value;

[0053] When the force applied to the deformable necking portion 9 is greater than the above threshold, the deformable necking portion 9 switches from the contracted state to the open state;

[0054] When the force applied to the deformable necking portion 9 is less than the threshold, the deformable necking portion 9 switches from the open state to the contracted state or always maintains the contracted state.

[0055] In this embodiment, the deformable necking portion 9 also has a transition state between the open state and the contracted state. When the deformable lock buckle is subjected to an external force, but the force is less than the above threshold, the deformable necking portion 9 is in a transition state. In the transition state, the diameter of the embedding interface 10 gradually increases but is still smaller than the diameter of the embedding interface 10.

[0056] During the use of this embodiment, when the transmission rod 6 and the piston rod 3 are installed, the elastic deformation of the deformable constricted portion 9 enables the ball head 8 to pass through the embedding interface 10 and fit into the ball socket 7; and when the installation is completed and in use, when the brake is impacted, the transmission rod 6 has a tendency to move away from the piston rod 3, but in the process of the ball head 8 leaving the ball socket 7, the deformable constricted portion 9 will be blocked, and the impact drives the transmission rod 6 to apply a force to the deformable constricted portion 9;

[0057] When the force is smaller than the threshold, the ball head 8 squeezes the deformable necking portion 9 and switches it from a contracted state to a transitional state, but is insufficient to switch it to an open state. Therefore, since the diameter of the embedding interface 10 is still smaller than the diameter of the ball head 8, the ball head 8 is restricted by the deformable necking portion 9 and cannot escape from the ball socket 7. After the impact, the force on the deformable necking portion 9 disappears and returns to a contracted state.

[0058] When the force is greater than the above threshold, the ball head 8 squeezes the deformable necking portion 9 and switches it directly from a contracted state to an open state, causing the diameter of the embedding interface 10 to be larger than the diameter of the ball head 8. The interference between the ball head 8 and the deformable necking portion 9 is eliminated, and the ball head 8 is able to detach from the ball socket 7 through the embedding interface 10.

[0059] In this embodiment, the deformable necking portion 9 is divided into a fitting section 11 and an insertion section 12 along the axial direction of the piston rod 3. The inner wall of the fitting section is opened in an arc shape and abuts against the spherical surface of the ball head 8, and the embedding interface 10 is opened on the insertion section 12.

[0060] In this embodiment, the brake body 1 is also connected to a vehicle oil pipe 5 , which is in communication with the pressure cylinder chamber 2 . The vehicle oil in the pressure cylinder chamber 2 is squeezed by the piston rod 3 and then output through the vehicle oil pipe 5 .

[0061] In this embodiment, the piston rod 3 and the deformable necking portion 9 are an integral piece.

[0062] In this embodiment, the ball socket 7 is in the shape of a ball with an opening on one side, and the arc-shaped inner wall of the fitting section 11 is a section of the groove wall of the ball socket 7 close to the opening.

[0063] Installation method of this embodiment: During the installation process of the transmission rod 6 and the piston rod 3 in this embodiment, firstly, the ball head 8 of the transmission rod 6 is fitted into the embedding interface 10, and the transmission rod 6 is pressed toward the ball socket 7, so that it applies a force to the deformable necking portion 9 of the piston rod 3, and the force is greater than the above-mentioned threshold value, thereby making the deformable necking portion 9 switch from a contracted state to an open state, and after the embedding interface 10 is expanded, the ball head 8 of the piston rod 3 is able to pass through and fit into the ball socket 7, and after the ball head 8 passes through, the deformable necking portion 9 is restored from an open state to a contracted state, and the fitting section 11 of the deformable necking portion 9 fits on the surface of the ball head 8, and at this point the transmission rod 6 and the piston rod 3 are connected.

[0064] The advantages of this embodiment are that a deformable necking portion is provided on the piston rod, which can effectively prevent the misalignment and separation between the transmission rod and the piston rod when the brake is subjected to a small impact, thereby making the brake more stable and safe during use; and when the brake is subjected to an excessively large impact, the transmission rod and the piston rod can be smoothly separated without colliding with each other, which can effectively protect the brake.

[0065] Embodiment 2

[0066] Combination Figures 5 to 8 The main difference between the present embodiment shown and the above-mentioned embodiment 1 is that in the present embodiment, the piston rod 3 is composed of a piston member 13 and a limit member 14 connected together, and the deformable necking portion 9 of the piston rod 3 is composed of the limit member 14.

[0067] In this embodiment, the ball socket 7 is hemispherical, and the inner wall of the fitting section 11 on the limit member 14 is hemispherical with a single-side opening. The ball socket 7 is connected and assembled with the inner wall of the fitting section 11, so that a spherical groove with a single-side opening is formed on the end face of the piston rod 3.

[0068] In this embodiment, a plurality of connecting ribs 15 are convexly provided on the end surface of the piston member 13 where the ball socket groove 7 is provided, and a plurality of connecting grooves 16 are provided on the end surface of the limiting member 14 on one side connected to the piston member 13, and the connecting ribs 15 are embedded in the connecting grooves 16.

[0069] The advantage of this embodiment is that the piston rod is formed by connecting the piston member and the limit member, which makes the processing and forming of the piston rod easier, and the piston member and the limit member do not have to be made of the same material and can be selected according to needs and application scenarios.

[0070] The remaining features and advantages of this embodiment are consistent with those of the above-mentioned embodiment 1 and will not be described in detail here.

[0071] The above specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A hydraulic brake with a transmission rod anti-slip function, comprising: A brake body (1) is provided with a pressure cylinder chamber (2) therein; A piston rod (3) movably inserted into the pressure cylinder chamber (2); A brake handle (4) which is rotatably connected to the brake body (1) and forms a transmission connection with the piston rod (3); A transmission rod (6), one end of which extends into the pressure cylinder chamber (2) to form a mating connection with the piston rod (3), and the other end of which is connected to the brake handle (4); The piston rod (3) has a ball socket (7) on its end surface, and the transmission rod (6) also has a ball head (8), which is rotatably embedded in the ball socket (7); The feature is that: the notch of the ball socket (7) is also provided with a deformable necking portion (9), the deformable necking portion (9) is also provided with an embedding interface (10), and the deformable necking portion (9) has at least a contracted state and an open state; When the deformable necking portion (9) is in a contracted state, the diameter of the embedding port (10) is smaller than the diameter of the ball head (8); When the deformable necking portion (9) is in an open state, the diameter of the embedding port (10) is equal to or greater than the diameter of the ball head (8).

2. The hydraulic brake with a transmission rod anti-slip function according to claim 1, characterized in that: The deformable necking portion (9) can produce a state change tendency under an external force, and the force has a threshold value; When the force applied to the deformable necking portion (9) is greater than the above threshold, the deformable necking portion (9) switches from a contracted state to an open state; When the force applied to the deformable necking portion (9) is less than the above threshold, the deformable necking portion (9) switches from an open state to a contracted state or always remains in the contracted state.

3. The hydraulic brake with a transmission rod anti-slip function according to claim 2, characterized in that: The deformable necking portion (9) is divided into a fitting section (11) and an insertion section (12) along the axial direction of the piston rod (3); the inner wall of the fitting section (11) is opened in an arc shape and abuts against the spherical surface of the ball head (8), and the embedding interface (10) is opened on the insertion section (12).

4. The hydraulic brake with a transmission rod anti-slip function according to claim 1, characterized in that: The brake body (1) is also connected to a vehicle oil pipe (5), and the vehicle oil pipe (5) is connected to the pressure cylinder chamber (2). The vehicle oil in the pressure cylinder chamber (2) is squeezed by the piston rod (3) and then output through the vehicle oil pipe (5).

5. The hydraulic brake with a transmission rod anti-slip function according to claim 3, characterized in that: The piston rod (3) and the deformable necking portion (9) are an integral part.

6. The hydraulic brake with a transmission rod anti-slip function according to claim 5, characterized in that: The ball socket (7) is in the shape of a ball with an opening on one side as a whole, and the arc-shaped inner wall of the fitting section (11) is a section of the groove wall of the ball socket (7) close to the groove opening.

7. The hydraulic brake with a transmission rod anti-slip function according to claim 3, characterized in that: The piston rod (3) is composed of a piston member (13) and a limiting member (14) connected together, and the deformable necking portion (9) of the piston rod (3) is formed by the limiting member (14).

8. The hydraulic brake with a transmission rod anti-slip function according to claim 7, characterized in that: The ball socket (7) is hemispherical, while the inner wall of the fitting section (11) on the limiting member (14) is hemispherical with a single-side opening. The ball socket (7) is connected and assembled with the inner wall of the fitting section (11), so that a spherical groove with a single-side opening is formed on the end surface of the piston rod (3).

9. The hydraulic brake with a transmission rod anti-slip function according to claim 7, characterized in that: A plurality of connecting ribs (15) are convexly provided on the end surface of the piston member (13) on which the ball socket groove (7) is formed, and a plurality of connecting grooves (16) are formed on the end surface of the stop member (14) on one side connected to the piston member (13), and the connecting ribs (15) are embedded in the connecting grooves (16).

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