Quick-change connecting rod

Abstract

The invention relates to a quick-change connecting rod which can realize quick change of tools such as a drill bit, a hole saw and a screwdriver bit on an electric drill. The tool connecting rod comprises a connecting rod body, a pull ring, a locking piece and the like, a tool is positioned and installed in an assembly position through the connecting rod body, the locking piece in a first guide groove abuts against the surface of the tool so that the tool can be locked in the assembly position, and the clearance of the tool after assembly is effectively eliminated.

Description

Technical Field

[0001] The present application relates to the technical field of quick-change connecting rods, and in particular to a quick-change connecting rod. Background Art

[0002] A quick-change adapter is a mechanical device that can quickly replace drilling tools. In traditional drilling processes, tools such as drill bits and hole saws cannot be quickly replaced. So far, many quick-change adapters have been designed. However, these quick-change adapters have complex structures and high manufacturing costs. The large axial gap between the tool and the quick-change adapter causes problems such as large tool runout when used. Therefore, a quick-change adapter that overcomes the above-mentioned shortcomings is needed. Summary of the invention

[0003] Based on this, it is necessary to provide a quick-change connecting rod to address problems such as large vibration when the tool is used.

[0004] A quick-change connecting rod comprises: a connecting rod body, a pull ring and a locking piece;

[0005] An assembly position is provided on the connecting rod body, and the assembly position is used to install the tool;

[0006] The connecting rod body is also provided with a first guide groove, which is inclined with respect to the central axis of the assembly position, and the inclination angle between the first guide groove and the central axis of the assembly position is smaller than the self-locking angle, and a notch communicating with the assembly position is provided in the first guide groove;

[0007] The locking member is arranged in the first guide groove, and the locking member extends from the notch into the assembly position to abut against the tool in the assembly position;

[0008] The pull ring is movably arranged on the connecting rod body, and is used to drive the locking piece to move along the first guide groove away from the notch. The connecting rod body is also provided with an elastic component, and the elastic component is used to press the locking piece toward the notch.

[0009] In one embodiment, the locking member is a roller needle, and when the locking member is located in the first guide groove, a portion of the locking member extends from the notch into the assembly position.

[0010] In one embodiment, both ends of the locking member are extended ends extending from both sides of the connecting rod body, and the pull ring and the elastic member are in contact with the extended ends.

[0011] In one embodiment, the pull ring is sleeved on the outer circumference of the connecting rod body.

[0012] In one of the embodiments, a retaining ring is further provided on the connecting rod body, and the elastic component is compressed between the retaining ring and the locking member.

[0013] In one embodiment, the assembly position is used to install a tool with a cylindrical outer circumference or a tool with a polygonal cross-section.

[0014] The above-mentioned quick-change connecting rod positions and installs the tool in the assembly position through the connecting rod body, and the locking piece in the first guide groove abuts against the tool surface to lock the tool in the assembly position. In some embodiments of the present application, the locking piece is pushed toward the tool under the action of the elastic component, so that the locking piece is always in contact with the tool surface, effectively eliminating the gap of the tool after assembly. The tool can be assembled and used by directly inserting it. When disassembly is required, the tool can be disassembled from the connecting rod body by pulling the pull ring to drive the locking piece away from the tool surface. Therefore, the installation and disassembly of the entire clamping device are very convenient, and the locking piece does not need to cooperate with the tool with a groove, which is suitable for clamping and using more types of tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is a schematic diagram of a quick-change connecting rod clamping tool provided in an embodiment of the present application.

[0016] FIG. 2 is a quick-change connecting rod provided in an embodiment of the present application.

[0017] FIG. 3 is a schematic diagram of the internal structure of FIG. 2 .

[0018] FIG. 4 is a structural diagram of FIG. 2 after the pull ring is hidden.

[0019] FIG5 is a cross-sectional schematic diagram of the connector of the tool according to the embodiment of the present application before installation.

[0020] FIG6 is a cross-sectional schematic diagram of the connector installation process of the tool according to the embodiment of the present application.

[0021] FIG. 7 is a cross-sectional schematic diagram of the connector of the tool according to the embodiment of the present application after installation.

[0022] FIG8 is a cross-sectional schematic diagram of the connector disassembly of the tool according to the embodiment of the present application.

[0023] FIG. 9 is a schematic diagram of the structure of the second embodiment of the present application.

[0024] FIG. 10 is an exploded view of the structure of the second embodiment of the present application.

[0025] FIG. 11 is a schematic diagram of a tool (connector connected to a hole saw) according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 application.

[0028] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0032] Referring to FIGS. 1 to 8 , a quick-change connecting rod according to some embodiments of the present application includes a connecting rod body 1, a pull ring 2, and a locking member 3. An assembly position 101 is provided on the connecting rod body 1, and the assembly position 101 is used to install a tool. The connecting rod body 1 is also provided with a first guide groove 11, and the first guide groove 11 is inclined to the central axis of the assembly position 101. A notch 1101 connected to the assembly position 101 is provided in the first guide groove 11. The locking member 3 is provided in the first guide groove 11, and the locking member 3 extends from the notch 1101 into the assembly position 101 to abut against the tool in the assembly position 101. The pull ring 2 is movably provided on the connecting rod body 1, and the pull ring 2 is used to drive the locking member 3 to move along the first guide groove 11 away from the notch 1101. The connecting rod body 1 is also provided with an elastic member 4, and the elastic member 4 is used to press the locking member 3 toward the notch 1101.

[0033] The present application provides a quick-change connecting rod, which positions and installs the tool in the assembly position through the connecting rod body, and the locking piece in the first guide groove abuts against the tool surface to lock the tool in the assembly position. In some embodiments of the present application, the locking piece is pushed toward the direction of the tool under the action of the elastic component, so that the locking piece is always in contact with the tool surface, effectively eliminating the gap of the tool after assembly. When disassembly is required, the tool can be disassembled from the connecting rod body by simply pulling the pull ring to drive the locking piece away from the tool surface. Therefore, the installation and disassembly of the entire clamping device are very convenient, and the locking piece does not need to cooperate with the tool with a groove, which is suitable for clamping more types of tools.

[0034] Moreover, in some embodiments of the present application, when the tool is installed, referring to Figures 5 to 7, the tool is directly inserted into the assembly position 101 and will also contact the portion of the locking member 3 located in the assembly position 101. During the installation process, the contact will naturally push the locking member 3 until the tool is installed in place. The locking member 3 is pushed back by the elastic member 4 so that it can maintain contact with the tool, thereby pressing the tool into the assembly position 101.

[0035] The quick-change connecting rod according to the present application is easy to use. Compared with other quick-change systems, other quick changes require three actions: control-insertion-relaxation of the control mechanism. The quick-change connecting rod according to the present application only needs to be inserted, and no control or loosening actions are required. The user's efficiency is greatly improved. Especially in aerial operations, where it is inconvenient to change tools with both hands in a narrow space, the quick-change connecting rod according to the quick-change connecting rod of the present application can change tools with one hand. It can better reflect the simple and quick use function. For users who hold the power tool in one hand, only the other hand is needed to load and unload the tool, and there is no need to control the quick-change connecting rod with both hands.

[0036] In some embodiments of the present application, the purpose of the inclined setting of the first guide groove 11 is that when the locking member 3 moves along the first guide groove 11 toward the notch 1101, and at the same time approaches the tool in the assembly position 101 from the radial direction, when being pressed by the elastic component 4, the locking member 3 maintains contact with the tool and generates a radial component force and an axial component force on the tool on the contact surface. In some embodiments of the present application, the radial component force is used to press the tool.

[0037] In some embodiments of the present application, as shown in FIG8 , the pull ring 2 plays the role of unlocking, and the pull ring 2 moves horizontally along the axial direction. In order to drive the locking member 3 to move, in some embodiments of the present application, the inclination angle between the first guide groove 11 and the central axis of the assembly position 101 is smaller than the self-locking angle. Otherwise, the locking member 3 will be self-locking and cannot be driven by the pull ring 2.

[0038] Further, referring to FIG. 11 , in some embodiments of the present application, a tool 91 is used to connect with a hole saw 93 , so that the hole saw 93 can be quickly installed into the quick-change connecting rod of the embodiment of the application through the tool 91 .

[0039] Specifically, the locking member 3 is a roller needle, and when the locking member 3 is located in the first guide groove 11, a part of the locking member 3 extends from the notch 1101 into the assembly position 101. The roller needle type locking member 3 has a simple structure and is used in the clamping structure. In some embodiments of the present application, the above-mentioned quick replacement effect can be achieved by moving the roller needle in the inclined first guide groove 11.

[0040] In some embodiments of the present application, in order to drive the locking member 3 to move, the two ends of the locking member 3 are extended ends extending from both sides of the connecting rod body 1, and the pull ring 2 and the elastic member 4 are in contact with the extended ends. The extended ends serve as matching ends, the front end of the pull ring 2 abuts against one side of the extended ends, and the elastic member 4 abuts against the other side of the extended ends, thereby achieving the effects of pushing, pulling and resetting. In addition, in some embodiments of the present application, the elastic member 4 can be implemented by a spring.

[0041] In some embodiments of the present application, the pull ring 2 is sleeved on the outer circumference of the connecting rod body 1. The overall appearance of the clamping device is more concise, and the covering design can hide the components such as the needle roller and the spring inside. In some embodiments of the present application, the front side of the pull ring 2 has a clamping ring-type step design, which can facilitate the pull ring 2 to limit the locking member 3 and drive the locking member 3 to move.

[0042] In some embodiments of the present application, a retaining ring 5 is further provided on the connecting rod body 1 , and the elastic component 4 is compressed between the retaining ring 5 and the locking member 3 .

[0043] In the present application, referring to FIG. 1 to FIG. 8 , the first embodiment of the tool is as follows: the assembly position 101 is a tool for installation, which has a connector with a cylindrical outer circumference.

[0044] In the present application, referring to Figures 9 and 10, the second embodiment of the tool is as follows: the assembly position 101 is used to install a tool or a connecting rod with a polygonal cross section or a planar outer circumference. In this embodiment, the connecting rod body 1 is also provided with a plurality of guide grooves distributed along the circumference with its center, and a locking member 3 is provided in each of the plurality of guide grooves. It uses a plurality of locking members 3 to clamp a tool with a planar or irregular outer circumference, so that it is more stable after clamping and is convenient for subsequent use.

[0045] The present application provides a quick-change connecting rod, which positions and installs the tool in the assembly position through the connecting rod body, and the locking piece in the first guide groove abuts against the tool surface to lock the tool in the assembly position. In some embodiments of the present application, the locking piece is pushed toward the tool under the action of the elastic component, so that the locking piece is always in contact with the tool surface, effectively eliminating the gap of the tool after assembly. When disassembly is required, the tool can be disassembled from the connecting rod body by simply pulling the pull ring to drive the locking piece away from the tool surface. Therefore, the installation and disassembly of the entire clamping device are very convenient, and the locking piece does not need to cooperate with the tool with a groove, which is suitable for clamping more types of tools.

[0046] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0047] The above 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 patent application. 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 application shall be subject to the attached claims.

Claims

1. A quick-change connecting rod, characterized in that: include: Extension rod body, pull ring and locking piece; The connecting rod body is provided with an assembly position, and the assembly position is used to install a tool; The connecting rod body is further provided with a first guide groove, the first guide groove is arranged obliquely with respect to the central axis of the assembly position, and the inclination angle between the first guide groove and the central axis of the assembly position is smaller than the self-locking angle, and a notch communicating with the assembly position is provided in the first guide groove; The locking member is arranged in the first guide groove, and the locking member extends from the notch into the assembly position to abut against the tool in the assembly position; The pull ring is movably arranged on the connecting rod body, and the pull ring is used to drive the locking member to move along the first guide groove away from the notch. An elastic component is also arranged on the connecting rod body, and the elastic component is used to press the locking member toward the notch.

2. The quick-change connecting rod according to claim 1, characterized in that: The locking member is a roller needle. When the locking member is located in the first guide groove, a portion of the locking member extends from the notch into the assembly position.

3. The quick-change connecting rod according to claim 1, characterized in that: Both ends of the locking member are extended ends extending from both sides of the connecting rod body, and both the pull ring and the elastic member are in contact with the extended ends.

4. The quick-change connecting rod according to claim 3, characterized in that: The pull ring is sleeved on the outer circumference of the connecting rod body.

5. The quick-change connecting rod according to claim 3, characterized in that: A retaining ring is also provided on the connecting rod body, and the elastic component is compressed between the retaining ring and the locking member.

6. The quick-change connecting rod according to claim 1, characterized in that: The assembly position is used to install a tool with a cylindrical outer circumference or a tool with a polygonal cross section.

Images