A piston return device

Abstract

The utility model discloses a piston reset device, including first push arm, second push arm and screw rod, first push arm can be installed on the second push arm of translational sliding, the side surface of first push arm away from second push arm is provided as the inclined plane of the inclination of the translation direction of first push arm, and the screw rod is along the translation direction of first push arm and is set up in first push arm and second push arm, and the screw rod is clamped in first push arm in the translation direction and can rotate relative to first push arm, and the screw rod is screwed with second push arm. Screw rod rotation process, only with second push arm through the relative movement of threaded connection, and screw rod and first push arm are relatively stationary in the translation direction, so this can avoid screw rod to rotate and separate from first push arm, and can control the relative position between screw rod, first push arm and second push arm well, convenient to use.

Description

Technical Field

[0001] This utility model relates to piston assembly auxiliary equipment, and in particular to a piston reset device. Background Technology

[0002] When replacing or repairing bicycle disc brake pads, the brake piston needs to be reset. Existing piston reset tools use two sliding push arms, utilizing the change in thickness between their sides as they slide to push the piston back to its original position. The two push arms are connected by a screw, which is threaded to both push arms. However, during use, it was found that when the screw is turned, it moves relative to the two push arms, and the relative position of the screw to the two push arms is difficult to control. This can easily cause the screw to unscrew out of one of the push arms, severely affecting its usability. Utility Model Content

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the related art. To this end, the present invention proposes a piston reset device.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] According to a first aspect of the present invention, a piston reset device includes a first push arm, a second push arm, and a screw. The first push arm is slidably mounted on the second push arm. The side of the first push arm away from the second push arm is configured as an inclined surface along the translation direction of the first push arm. The screw passes through the first push arm and the second push arm along the translation direction of the first push arm. The screw is engaged in the first push arm in the translation direction and can rotate relative to the first push arm. The screw is threadedly connected to the second push arm.

[0006] The piston reset device according to the embodiment of the present utility model has at least the following beneficial effects: during the rotation of the screw, it only moves relative to the second push arm through the threaded connection, and the screw and the first push arm are relatively stationary in the translational direction. This can prevent the screw from disengaging from the first push arm when rotating, and can well control the relative position between the screw, the first push arm and the second push arm, which is convenient to use.

[0007] According to some embodiments of the present invention, a locking element is also included. A locking groove is provided on the first push arm. The screw passes through the first push arm and extends into the locking groove. The locking element is placed in the locking groove and locked onto the screw. The locking element can restrict the screw from moving relative to the first push arm in the translational direction.

[0008] According to some embodiments of the present invention, a sliding groove is provided on the screw, the sliding groove is arranged in a circular shape around the central axis of the screw, and a clamping arm is provided on the clamping member, the clamping arm being inserted into the sliding groove perpendicular to the axial direction of the screw.

[0009] According to some embodiments of the present invention, the clamping arms are respectively provided on both sides of the clamping member, and a U-shaped clamping cavity is provided between the two clamping arms, the inner wall of the clamping cavity being slidably connected in the sliding groove.

[0010] According to some embodiments of this utility model, the card is fixed in the card slot by applying glue.

[0011] According to some embodiments of the present invention, the side of the first push arm away from the inclined surface is a first sliding surface, and the slot has an opening on the first sliding surface, through which the card is inserted into the slot.

[0012] According to some embodiments of the present invention, the side of the second push arm facing the first sliding surface is the second sliding surface, which can block the opening to restrict the card from disengaging from the card slot.

[0013] According to some embodiments of the present invention, one of the first push arm and the second push arm is provided with a guide groove, and the other is provided with a slide rail. Both the slide rail and the guide groove extend along the translational direction of the first push arm, and the first push arm and the second push arm slide together through the guide groove and the slide rail.

[0014] According to some embodiments of the present invention, a positioning groove is provided on the inclined surface, and the positioning groove extends in a straight line along the translation direction of the first push arm.

[0015] According to some embodiments of the present invention, a positioning hole is provided on the second push arm, the positioning hole and the positioning groove are positioned opposite each other, and the positioning hole is connected to the positioning groove along an axial direction perpendicular to the screw.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the piston reset device;

[0019] Figure 2 This is an exploded view of the piston reset device.

[0020] Figure 3 yes Figure 1 A diagram illustrating the usage status;

[0021] Figure 4 This is a schematic diagram showing the usage of the piston reset device in conjunction with the clamp.

[0022] Figure 5 yes Figure 1 Partial structural diagram;

[0023] Figure 6 This is an assembly diagram of the screw and clamp;

[0024] Figure 7 This is a structural diagram of the card.

[0025] Reference numerals: First push arm 100; inclined surface 110; positioning groove 111; slot 120; opening 121; first sliding surface 130; slide rail 140; through hole 150; second push arm 200; second sliding surface 210; guide groove 220; positioning hole 230; screw 300; slide groove 310; clamp 400; clamping arm 410; clamping cavity 420; clamp 500; piston 510; handle 600. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] This utility model relates to a piston reset device, including a first push arm 100, a second push arm 200, and a screw 300.

[0028] like Figure 1 and Figure 2As shown, both the first push arm 100 and the second push arm 200 are flat, elongated plate-like structures. The first push arm 100 is connected to the second push arm 200 and can slide relative to the second push arm 200. In the direction shown, the first push arm 100 and the second push arm 200 are vertically distributed, and the translational direction of the first push arm 100 relative to the second push arm 200 is left-right. The thickness direction of the first push arm 100 and the second push arm 200 is vertical. The side of the first push arm 100 away from the second push arm 200 is set as an inclined surface 110, which is inclined along the translational direction of the first push arm 100. In the figure, the inclined surface 110 is inclined from the upper left to the lower right. The screw 300 passes through the first push arm 100 and the second push arm 200 from left to right along the translational direction of the first push arm 100. The screw 300 is engaged with the first push arm 100 in the translational direction, meaning the screw 300 and the first push arm 100 are relatively fixed in the left-right direction, and the screw 300 can rotate relative to the first push arm 100. The screw 300 is threadedly connected to the second push arm 200. To facilitate rotation of the screw 300, a handle 600 can be installed on the end of the screw 300 away from the first push arm 100, allowing the screw 300 to be rotated via the handle 600.

[0029] In actual use, the piston reset device is mainly used to reset the piston 510 of the disc brake. For example... Figure 1 As shown, initially, the first push arm 100 is positioned flush with the right end of the second push arm 200. Figure 3 and Figure 4 As shown, the first push arm 100 and the second push arm 200 are inserted into the disc brake caliper 500 from left to right. The inclined surface 110 abuts against the upper part of the caliper 500, and the lower side of the second push arm 200 abuts against the piston 510 at the lower part of the caliper 500. Then, the screw 300 is rotated, and the screw 300 gradually moves to the right relative to the second push arm 200. The screw 300 pushes the first push arm 100 to move to the right. During the rightward movement of the first push arm 100, the inclined surface 110, in conjunction with the lower side of the second push arm 200, pushes the piston 510 downward, causing the piston 510 to move and reset into the caliper 500. After the piston 510 has reset, the piston reset device is pulled out of the caliper 500, and the screw 300 is rotated in the opposite direction, causing the screw 300 to move to the left relative to the second push arm 200, thus moving the first push arm 100 to the left and resetting, ready for the next use. During the rotation of the screw 300, it only moves relative to the second push arm 200 through the threaded connection. The screw 300 and the first push arm 100 remain relatively stationary in the translational direction. This prevents the screw 300 from disengaging from the first push arm 100 during rotation and allows for good control of the relative positions between the screw 300, the first push arm 100, and the second push arm 200, making it convenient to use.

[0030] In one embodiment, such as Figure 5 , Figure 6 and Figure 7 As shown, the piston reset device also includes a locking member 400. A locking groove 120 is provided on the first push arm 100. The screw 300 passes through the first push arm 100 and extends into the locking groove 120. Alternatively, as shown in the diagram, the locking groove 120 can be opened vertically along the thickness direction of the first push arm 100, and a through hole 150 extending to the right and connecting to the locking groove 120 is provided on the left side of the first push arm 100. After the right end of the screw 300 passes through the second push arm 200, it then passes through the through hole 150 from left to right and extends into the locking groove 120. The locking member 400 is inserted into the locking groove 120, and the locking groove 120 is engaged with the screw 300. The locking member 400 limits the screw 300 to the left and right relative to the first push arm 100 in the translational direction, that is, it restricts the screw 300 from disengaging from the first push arm 100 to the left and from continuing to extend into the first push arm 100 to the right. When the screw 300 rotates, the screw 300 can rotate relative to the clamp 400, so as not to affect the rotation of the screw 300.

[0031] Based on the above embodiment, a groove 310 is provided on the screw 300. The groove 310 is arranged in a circular shape around the central axis of the screw 300. The groove 310 can be located near the right end of the screw 300. A clamping arm 410 is provided on the locking member 400. During installation, the screw 300 passes through the first push arm 100 and extends into the locking groove 120, at which time the groove 310 is located in the locking groove 120. The locking member 400 is inserted into the locking groove 120, and the clamping arm 410 is inserted into the groove 310 in a direction perpendicular to the axial direction of the screw 300, thereby restricting the relative movement of the first push arm 100 and the screw 300 in the translational direction. The width dimension of the locking groove 120 in the left-right direction is slightly larger than the width dimension of the clamping arm 410 in the left-right direction, so that the screw 300 can still rotate smoothly when the clamping arm 410 is engaged in the groove 310. At this time, the first push arm 100 and the screw 300 can move a very small distance relative to each other in the translation direction, but the screw 300 cannot be separated from the first push arm 100 and can continue to extend into the first push arm 100 without restriction.

[0032] Furthermore, clamping arms 410 are provided on both sides of the clamping member 400. A clamping cavity 420 is formed between the two clamping arms 410. The inner wall of the clamping cavity 420 is U-shaped. The inner wall of the clamping cavity 420 slides in the sliding groove 310. The clamping arms 410 on both sides restrict the relative movement of the screw 300 and the first push arm 100 in the translational direction, ensuring balance during positioning.

[0033] The clip 400 can be fixed in the slot 120 by applying glue. This fixes the clip 400 relative to the first push arm 100, preventing the clip 400 from detaching from the slot 120 during use and thus releasing the limiting effect on the screw 300.

[0034] In one embodiment, such as Figure 2 , Figure 4 and Figure 5 As shown, the side of the first push arm 100 away from the inclined plane 110 is the first sliding surface 130. In the direction shown, the lower side of the first push arm 100 is the first sliding surface 130. The slot 120 has an opening 121 on the first sliding surface 130. The clip 400 is inserted into the slot 120 through the opening 121. The side of the second push arm 200 facing the first sliding surface 130 is the second sliding surface 210, that is, the upper side of the second push arm 200 in the figure is the second sliding surface 210. The first sliding surface 130 and the second sliding surface 210 are opposite each other, and the opening 121 faces the second sliding surface 210. The first sliding surface 130 and the second sliding surface 210 are close to or abut against each other. When the first push arm 100 translates relative to the second push arm 200, the second sliding surface 210 remains below the opening 121. The second sliding surface 210 is close to or against the opening 121, thereby blocking the opening 121 and preventing the locking piece 400 from disengaging from the slot 120 and the slide groove 310, thus limiting the locking piece 400 in the slot 120. When disassembly is required, the screw 300 is rotated until it disengages from the second push arm 200, and the second sliding surface 210 moves away from the opening 121, allowing the locking piece 400 to be removed from the slot 120. Then, the screw 300 can be pulled away from the first push arm 100, facilitating the installation and removal of the screw 300 and the first push arm 100.

[0035] In one embodiment, such as Figure 2 and Figure 3 As shown, one of the first push arm 100 and the second push arm 200 is provided with a guide groove 220, and the other is provided with a slide rail 140. In this embodiment, the first push arm 100 is provided with a slide rail 140, and the second push arm 200 is provided with a guide groove 220. The slide rail 140 and the guide groove 220 extend along the translational direction of the first push arm 100. The slide rail 140 slides in the guide groove 220, and the cooperation of the slide rail 140 and the guide groove 220 enables the first push arm 100 and the second push arm 200 to translate stably relative to each other.

[0036] In one embodiment, such as Figure 1 and Figure 2As shown, a positioning groove 111 is provided on the inclined surface 110. The positioning groove 111 extends horizontally in a straight line along the translational direction of the first push arm 100. When used with the disc brake caliper 500, a protrusion on the upper side of the caliper 500 is inserted into the positioning groove 111. When the first push arm 100 translates, the protrusion can slide along the positioning groove 111, allowing the first push arm 100 to move stably relative to the caliper 500. Furthermore, a positioning hole 230 is provided on the second push arm 200. The positioning hole 230 and the positioning groove 111 are positioned opposite each other, and the positioning hole 230 is connected to the positioning groove 111 along an axial direction perpendicular to the screw 300. In the direction shown in the figure, the positioning groove 111 is located above the positioning hole 230, and the positioning hole 230 penetrates the second push arm 200 vertically along its thickness direction. A portion of the piston 510 at the lower part of the clamp 500 protrudes into the positioning hole 230, thereby ensuring that the second push arm 200 and the piston 510 remain relatively stationary in the left-right direction when the first push arm 100 moves, which is conducive to resetting the piston 510 in the up-down direction.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, references to terms such as "specific embodiment" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A piston return device characterized by: The assembly includes a first push arm (100), a second push arm (200), and a screw (300). The first push arm (100) is slidably mounted on the second push arm (200). The side of the first push arm (100) away from the second push arm (200) is configured as an inclined surface (110) inclined along the translation direction of the first push arm (100). The screw (300) passes through the first push arm (100) and the second push arm (200) along the translation direction of the first push arm (100). The screw (300) is engaged in the first push arm (100) in the translation direction and can rotate relative to the first push arm (100). The screw (300) is threadedly connected to the second push arm (200).

2. The piston reset device according to claim 1, characterized in that: It also includes a locking element (400), on which the first push arm (100) has a locking groove (120), the screw (300) passes through the first push arm (100) and extends into the locking groove (120), the locking element (400) is placed in the locking groove (120) and locked onto the screw (300), the locking element (400) can restrict the screw (300) from moving relative to the first push arm (100) in the translational direction.

3. The piston reset device according to claim 2, characterized in that: The screw (300) is provided with a sliding groove (310), which is arranged in a ring around the central axis of the screw (300). The clamp (400) is provided with a clamping arm (410), which is perpendicular to the axial direction of the screw (300) and passes through the sliding groove (310).

4. The piston reset device according to claim 3, characterized in that: The clamping arm (410) is provided on both sides of the clamping member (400), and a U-shaped clamping cavity (420) is provided between the two clamping arms (410). The inner wall of the clamping cavity (420) is slidably connected in the sliding groove (310).

5. The piston reset device according to claim 2 or 3, characterized in that: The card (400) is fixed in the card slot (120) by applying glue.

6. The piston reset device according to claim 2 or 3, characterized in that: The side of the first push arm (100) away from the inclined surface (110) is the first sliding surface (130). The slot (120) has an opening (121) on the first sliding surface (130). The card (400) is inserted into the slot (120) through the opening (121).

7. The piston reset device according to claim 6, characterized in that: The side of the second push arm (200) facing the first sliding surface (130) is the second sliding surface (210), which can block the opening (121) to restrict the card (400) from disengaging from the slot (120).

8. The piston reset device according to claim 1, characterized in that: One of the first push arm (100) and the second push arm (200) is provided with a guide groove (220), and the other is provided with a slide rail (140). The slide rail (140) and the guide groove (220) both extend along the translational direction of the first push arm (100). The first push arm (100) and the second push arm (200) are slidably connected through the guide groove (220) and the slide rail (140).

9. The piston reset device according to claim 1, characterized in that: The inclined surface (110) is provided with a positioning groove (111), which extends in a straight line along the translation direction of the first push arm (100).

10. The piston reset device according to claim 9, characterized in that: The second push arm (200) has a positioning hole (230) and the positioning groove (111) are opposite to each other. The positioning hole (230) is connected to the positioning groove (111) along an axial direction perpendicular to the screw (300).

Images