Pull wire fixing structure and pull wire oil pressure conversion pump

Abstract

The utility model relates to a stay wire fixing structure and a stay wire oil pressure conversion pump. The stay wire fixing structure comprises a pump body, a driving cavity and an oil outlet hole communicated with the driving cavity are formed in the pump body, a stay wire driving piece is movably assembled in the driving cavity and comprises an oil pressure driving part, a stay wire fixing part and a stay wire, and the oil pressure driving part is movably assembled in the driving cavity; the first end of the stay wire penetrates through or penetrates into the oil pressure driving part and is fixed with the stay wire fixing part; the stay wire fixing part comprises a first end piece, a first fixing piece and a second fixing piece, the first end piece is fixedly assembled at the first end of the driving cavity, a first movable cavity is formed in the middle of the first end piece, and the first fixing piece and the second fixing piece are combined and movably assembled in the first movable cavity; and a combined wire slot through which the first end of the stay wire passes and is clamped and positioned is formed between the first fixing piece and the second fixing piece. According to the utility model, the frictional contact area of the stay wire is increased, the stay wire is not deformed and damaged, and the stay wire fixing effect is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle accessories, in particular to a cable fixing structure and a cable-pulling oil pressure conversion pump. Background Art

[0002] Cable-pulled hydraulic disc brake is a new type of disc brake on the market that combines cable-pulled disc brake and hydraulic disc brake. It has the advantages of cable-pulled disc brake and hydraulic disc brake, with lower cost and better braking experience.

[0003] The key component of the cable-pull oil disc is the cable-pull oil pressure conversion pump, which is used to convert the cable force of the cable brake handle into oil pressure and pump it down. The cable of the existing cable-pull oil pressure conversion pump is generally fixed by a wire buckle terminal, that is, one end of the cable is inserted into or passed through the axial hole of the wire buckle end, and then the locking screw is screwed into the radial thread of the wire buckle end. The locking screw radially presses the cable and the axial hole wall of the wire buckle end to achieve cable fixation.

[0004] However, the existing cable fixing has a small pressing contact area, and the cable fixing is unstable under large pulling force. On the other hand, the radial locking force of the locking screw will also cause the cable to deform and damage, further increasing the instability of the cable fixing. To this end, we propose a cable fixing structure and a cable pulling oil pressure conversion pump. Utility Model Content

[0005] The present application provides a wire fixing structure and a wire-pull oil pressure conversion pump to at least solve the problem of wire fixing of existing wire-pull oil pressure conversion pumps in the prior art. Due to the small clamping contact area, the fixation of the wire is unstable under large pulling force. On the other hand, the radial locking force of the wire locking screw will also cause the wire to deform and be damaged, further increasing the problem of instability of the wire fixing.

[0006] In a first aspect, the present application provides a cable fixing structure, comprising a pump body, wherein a driving cavity and an oil outlet hole communicating with the driving cavity are formed on the pump body, a cable driving member is movably mounted in the driving cavity, and the cable driving member comprises: a hydraulic driving part, a cable fixing part and a cable, wherein the hydraulic driving part is movably mounted in the driving cavity, and a first end of the cable passes through or penetrates the hydraulic driving part and is fixed to the cable fixing part;

[0007] The pull wire fixing part includes a first end piece, a first fixing piece and a second fixing piece. The first end piece is fixedly assembled at the first end of the driving cavity, and a first movable cavity is opened in the middle thereof. The first fixing piece and the second fixing piece are combined and movably assembled in the first movable cavity by a plurality of radially arranged locking screws, and a combined wire groove is opened between the first fixing piece and the second fixing piece for the first end of the pull wire to pass through and clamp and position.

[0008] Optionally, the hydraulic drive unit includes:

[0009] A piston pull rod, which is movably assembled in the driving cavity, and has a hollow hole axially opened in the middle thereof for passing the pull wire;

[0010] A sealing ring, which is sleeved on the piston pull rod and limitedly assembled on the step portion formed on the inner wall of the driving chamber;

[0011] A piston ring, which is fixedly sleeved on a stage formed in the radial middle of the piston rod, and whose outer wall surface abuts against the inner wall of the driving cavity, and an oil cavity is formed between the piston ring and the sealing ring;

[0012] A second end piece, which is threadedly assembled on the second end of the driving cavity and presses and fixes the axial position of the sealing ring, and a second movable cavity is opened in the middle thereof;

[0013] An elastic member, one end of which is limitedly assembled in the hollow hole, and the other end of which extends into the second active cavity to provide elastic restoring force to the piston rod.

[0014] Optionally, the first end piece is threadedly assembled with the second open end of the driving cavity and abuts against the side wall surface of the stage to limit the starting point of the stroke of the piston pull rod.

[0015] Optionally, the pull wire fixing portion further includes an insert body, a first end of which is inserted into the first end of the piston rod close to the pull wire fixing portion, and a second end of the insert body is fixed to the first fixing member.

[0016] Optionally, a positioning step having a diameter larger than an inner diameter of the hollow hole at the first end of the piston pull rod is further provided on a side of the plug-in body close to the first fixing member.

[0017] Optionally, a mounting groove for accommodating the wire locking screw with a countersunk head is provided on the side wall of the second fixing member.

[0018] In a second aspect, the present application provides a wire-pull oil pressure conversion pump, which includes the wire-pull fixing structure of the first aspect, and further includes:

[0019] An oil pool cavity is provided on the pump body and is connected with the driving cavity through a balance hole to balance the oil pressure;

[0020] The first end of the oil pipe is assembled on the output end of the oil outlet through an oil pipe joint, and the second end is connected to the oil pressure pump assembled at the front / rear wheel of the bicycle frame.

[0021] Compared with the related art, the wire-pulling fixing structure and wire-pulling oil pressure conversion pump provided by the present application have at least the following technical effects:

[0022] By improving the wire fixing method, the wire end is located in the combined wire trough, and the friction contact area between the wire and the combined wire trough is increased under the tightening of the wire locking screw, so as to increase the friction contact area between the wire and the combined wire trough under the clamping force, and stably clamp the wire in the wire fixing part. Compared with traditional radial screw locking, the wire will not be deformed and damaged, thereby optimizing the wire fixing effect.

[0023] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The figure is a three-dimensional diagram of the structure of a wire-pull oil pressure conversion pump according to an exemplary embodiment.

[0026] Figure 2 is a top view of a pump body structure according to an exemplary embodiment.

[0027] Figure 3 The figure is a cross-sectional view of a wire-pull oil pressure conversion pump structure according to an exemplary embodiment.

[0028] Figure 4 It is a schematic diagram of the structure of a wire driving component according to an exemplary embodiment.

[0029] Description of reference numerals:

[0030] Pump body 10; drive chamber 20: step portion 201; oil pool chamber 30: balance hole 301; oil outlet hole 40; oil pipe joint 401; oil replenishment port 50;

[0031] The wire driving component 60: piston rod 601, piston ring 602, elastic component 603, sealing ring 604, first end component 606, second end component 605, wire fastener 607: positioning step 6071, plug-in body 6072, first fixing component 6073, second fixing component 6074, wire locking screw 6075, wire groove 6076. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] 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.

[0035] In the related art, the existing wire-pull hydraulic conversion pump generally adopts the fixing method of wire buckle terminal, that is, one end of the wire is inserted into or passed through the axial hole of the wire buckle end, and then the wire locking screw is screwed into the radial thread of the wire buckle end. The wire locking screw radially presses the wire and the axial hole wall of the wire buckle end to achieve wire fixing. However, due to the small pressing contact area, the fixing of the wire is unstable under large pulling force. On the other hand, the radial locking force of the wire locking screw will also cause the wire to deform and damage, further increasing the instability of the wire fixing.

[0036] Based on the above situation, an embodiment of the utility model provides a wire fixing structure and a wire-pull oil pressure conversion pump, which are described in detail below in conjunction with specific embodiments and drawings.

[0037] Example 1

[0038] An embodiment of the utility model provides a pull wire fixing structure. Figure 1 The figure is a three-dimensional diagram of the structure of a wire-pull oil pressure conversion pump according to an exemplary embodiment. Figure 2 is a top view of a pump body structure according to an exemplary embodiment. Figure 3The figure is a cross-sectional view of a wire-pull oil pressure conversion pump structure according to an exemplary embodiment. Figure 4 FIG. 1 is a schematic diagram of a wire driving component structure according to an exemplary embodiment. Figure 1-4 As shown, the cable fixing structure includes a pump body 10, a driving chamber 20 and an oil outlet 40 communicating with the driving chamber 20 are provided on the pump body 10, a cable driving member 60 is movably mounted in the driving chamber 20, and the cable driving member 60 includes: a hydraulic driving part, a cable fixing part and a cable, the hydraulic driving part is movably mounted in the driving chamber 20, and a first end of the cable passes through the hydraulic driving part and is fixed to the cable fixing part;

[0039] The wire fixing portion includes a first end piece 606, a first fixing piece 6073 and a second fixing piece 6074. The first end piece 606 is fixedly assembled at the first end of the driving cavity 20, and a first movable cavity is opened in the middle thereof. The first fixing piece 6073 and the second fixing piece 6074 are combined and movably assembled in the first movable cavity through a plurality of radially arranged locking screws 6075. In this embodiment, an assembly groove for a countersunk head to accommodate the screw head of the locking screw 6075 is opened on the side wall of the second fixing piece 6074; a combined wire groove 6076 for the first end of the wire to pass through or penetrate and clamp and position is opened between the first fixing piece 6073 and the second fixing piece 6074.

[0040] In this embodiment, refer to the attached Figure 3-4 The pull wire fixing part also includes a plug-in body 6072, a first end of which is plugged into the first end of the piston pull rod 601 close to the pull wire fixing part, and the second end of the plug-in body 6072 is fixed to the first fixing piece 6073; the plug-in body 6072 is also provided with a positioning step 6071 on one side close to the first fixing piece 6073, the diameter of which is larger than the inner diameter of the hollow hole at the first end of the piston pull rod 601.

[0041] In the technical solution of the above embodiment, refer to the attached Figure 3 and 4 After the pull wire passes through the hydraulic drive unit, it passes through the plug-in body 6072 and the positioning step 6071 in sequence, and then reaches between the first fixing piece 6073 and the second fixing piece 6074. The position of the first end of the pull wire is adjusted so that it is located in the combined wire groove 6076. The wire locking screw 6075 is tightened to increase the friction contact area between the pull wire and the combined wire groove 6076 under the clamping force, so that the pull wire is stably clamped and positioned in the pull wire fixing part, and the pull wire will not be deformed, damaged, and fixed; then, the pull wire fixing part is assembled into the first movable cavity of the first end piece 606. It can be understood that the outer wall surface of the combination of the first fixing piece 6073 and the second fixing piece 6074 is adapted to the inner wall surface of the first movable cavity, so that when the wire is pulled, the combination of the first fixing piece 6073 and the second fixing piece 6074 can move in the first movable cavity. After the installation is completed, the tightness of the pull wire is adjusted to complete the assembly.

[0042] In this embodiment, refer to the attached Figure 3-4 The hydraulic drive unit includes: a piston rod 601, which is movably mounted in the drive chamber 20, and a hollow hole for passing the pull wire is axially opened in the middle thereof; a sealing ring 604, which is sleeved on the piston rod 601 and limitedly mounted on the step portion 201 formed on the inner wall of the drive chamber 20; a piston ring 602, which is fixedly sleeved on the step portion formed in the radial middle of the piston rod 601, and its outer wall surface is in contact with the inner wall of the drive chamber 20, and a seal is formed between the piston ring 602 and the sealing ring 604. There is an oil cavity. Furthermore, a first end piece 606 is threadedly assembled with the second open end of the driving cavity 20 and abuts against the side wall of the stage to limit the starting point of the stroke of the piston pull rod 601; a second end piece 605 is threadedly assembled on the second end of the driving cavity 20 and presses and fixes the axial position of the sealing ring 604, and a second movable cavity is opened in the middle thereof; an elastic piece 603, one end of which is limitedly assembled in the hollow hole, and the other end extends into the second movable cavity to provide elastic reset force to the piston pull rod 601.

[0043] In the technical solution of the above embodiment, when installed on a bicycle, it is used in conjunction with the brake handle and the oil pressure pump. Specifically, the second end of the pull wire is connected to the brake handle, and the first end is fixed by the pull wire fixing part; the first end of the oil pipe is connected to the oil outlet 40 through the oil pipe joint 401, and the second end is connected to the oil pressure pump assembled at the front / rear wheel of the bicycle frame;

[0044] When the brake handle is squeezed, the piston rod 601 is pulled by the pull wire and moves axially forward in the driving chamber 20, and drives the oil in the oil chamber to be discharged through the oil outlet 40 through the piston ring 602, and then enters the oil pressure pump at the front / rear wheel through the oil pipe. The oil pressure pump clamps the disc of the front / rear wheel for oil pressure braking, and the oil circuit is smooth and the braking is stable.

[0045] In summary, the wire fixing structure provided by the embodiment of the utility model improves the wire fixing method so that the wire end is located in the combined wire groove 6076, and the friction contact area between the wire and the combined wire groove 6076 is increased under the tightening of the wire locking screw 6075, so as to increase the friction contact area between the wire and the combined wire groove 6076 under the clamping force, stably clamp the wire in the wire fixing part, and the wire will not be deformed and damaged.

[0046] Example 2

[0047] The difference between this embodiment and embodiment 1 is that embodiment 2 of the utility model provides a wire-pull oil pressure conversion pump. Figure 1 The figure is a three-dimensional diagram of the structure of a wire-pull oil pressure conversion pump according to an exemplary embodiment. Figure 2 FIG. 1 is a top view of a pump structure according to an exemplary embodiment. Figure 1-2As shown, the wire-pull oil pressure conversion pump includes the wire-pull fixing structure of the above-mentioned embodiment 1, and also includes:

[0048] The oil pool chamber 30 is opened on the pump body 10 and communicates with the driving chamber 20 through a balance hole 301 to balance the oil pressure;

[0049] The oil pipe has a first end assembled on the output end of the oil outlet hole 40 through an oil pipe joint 401, and a second end connected to an oil pressure pump assembled at the front / rear wheel of the bicycle frame.

[0050] For other structures not described, refer to Example 1.

[0051] In summary, the wire fixing structure and wire-pull oil pressure conversion pump provided by the embodiments of the utility model improve the wire fixing method so that the wire end is located in the combined wire groove 6076, and the friction contact area between the wire and the combined wire groove 6076 is increased under the tightening of the wire locking screw 6075, so as to increase the friction contact area between the wire and the combined wire groove 6076 under the clamping force, stably clamp the wire in the wire fixing part, and compared with the traditional radial screw locking, the wire will not be deformed and damaged, thereby optimizing the wire fixing effect.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A pull wire fixing structure, comprising a pump body, characterized in that: The pump body is provided with a driving cavity and an oil outlet hole connected with the driving cavity, a wire driving member is movably mounted in the driving cavity, and the wire driving member comprises: a hydraulic driving part, a wire fixing part and a wire, the hydraulic driving part is movably mounted in the driving cavity, and a first end of the wire passes through the hydraulic driving part and is fixed to the wire fixing part; The pull wire fixing part includes a first end piece, a first fixing piece and a second fixing piece. The first end piece is fixedly assembled at the first end of the driving cavity, and a first movable cavity is opened in the middle thereof. The first fixing piece and the second fixing piece are combined and movably assembled in the first movable cavity by a plurality of radially arranged locking screws, and a combined wire groove is opened between the first fixing piece and the second fixing piece for the first end of the pull wire to pass through or penetrate and be clamped and positioned.

2. The wire fixing structure according to claim 1, characterized in that: The hydraulic drive unit includes: A piston pull rod, which is movably assembled in the driving cavity and has a hollow hole axially opened in the middle thereof for passing the pull wire; A sealing ring, which is sleeved on the piston pull rod and limitedly assembled on the step portion formed on the inner wall of the driving chamber; A piston ring, which is fixedly sleeved on a stage formed in the radial middle of the piston rod, and whose outer wall surface abuts against the inner wall of the driving cavity, and an oil cavity is formed between the piston ring and the sealing ring; A second end piece, which is threadedly assembled on the second end of the driving cavity and presses and fixes the axial position of the sealing ring, and a second movable cavity is opened in the middle thereof; An elastic member, one end of which is limitedly assembled in the hollow hole, and the other end of which extends into the second active cavity to provide elastic restoring force to the piston rod.

3. The wire fixing structure according to claim 2, characterized in that: The first end piece is threadedly assembled with the second open end of the driving cavity and abuts against the side wall surface of the stage to limit the starting point of the stroke of the piston pull rod.

4. The wire fixing structure according to claim 2, characterized in that: The pull wire fixing part also includes an inserting body, a first end of which is inserted into the first end of the piston rod close to the pull wire fixing part, and a second end of the inserting body is fixed to the first fixing member.

5. The wire fixing structure according to claim 4, characterized in that: A positioning step having a diameter greater than the inner diameter of the hollow hole at the first end of the piston pull rod is also provided on one side of the plug-in body close to the first fixing member.

6. The wire fixing structure according to claim 1, characterized in that: The side wall of the second fixing member is provided with an assembly groove for accommodating the locking screw with a countersunk head.

7. A line-pull oil pressure conversion pump, characterized in that: It includes the pull wire fixing structure according to any one of claims 1 to 6, and further includes: An oil pool cavity is provided on the pump body and is connected with the driving cavity through a balance hole to balance the oil pressure; The oil pipe has a first end assembled on the output end of the oil outlet hole through an oil pipe joint, and a second end connected to an oil pressure pump assembled at the front / rear wheel of the bicycle frame.

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