A connection structure of an extension rod of a power tool

Abstract

The application discloses a connecting structure of an extension rod of an electric tool, which comprises an extension pipe, a limiting hole is formed in the outer periphery of the extension pipe; an extension connecting piece, one end of the extension connecting piece is connected with the extension pipe, a radially extending connecting groove is formed in the outer periphery of the extension connecting piece; and a clamping plate, the clamping plate can be inserted into the connecting groove and is clamped and matched with the connecting groove, a limiting block capable of entering the limiting hole is arranged at the bottom of the clamping plate; the extension pipe is connected with the extension connecting piece, meanwhile, the limiting hole is directly opposite to the direction of the connecting groove, at this time, the clamping plate is inserted into the connecting groove, under the action of the limiting block and the limiting surface, the limiting block under the clamping plate can naturally enter the limiting groove, the extension pipe cannot be moved, the connection is completed, and the limiting of the extension pipe can be completed through the clamping and matching of the clamping plate and the connecting groove.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to a connection structure for a power tool extension rod. Background Technology

[0002] In practical applications of power tools, such as working at heights or in deep cavities, extension rods need to be installed on power tools to accommodate the corresponding operating heights in order to expand the working range of the tools. In the prior art, there is a connecting rod structure for power tools proposed in publication number CN216933075U. Such connecting structures often require a relatively complex structural fit, and also require many or irregularly shaped mating holes to be opened on the extension tube. This complicates the manufacturing process of the connecting structure and the extension tube and increases manufacturing costs. Therefore, how to solve the above problems is the purpose of this application.

[0003] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0004] Based on this, this application provides a connection structure for an extension rod of a power tool to solve one of the aforementioned technical problems.

[0005] The technical solution adopted by this application to solve its technical problem is a connection structure for an extension rod of an electric tool, including: an extension tube with a limiting hole on its outer periphery; an extension connector, one end of which is connected to the extension tube, and a radially extending connecting groove is provided on the outer periphery of the extension connector; a retaining plate, which can be inserted into the connecting groove and locked in place with the connecting groove, and a retaining block is provided at the bottom of the retaining plate that can enter the limiting hole.

[0006] In some embodiments, the extension connector has two radially arranged lugs, an extension block is arranged between the lugs, and the connecting groove is formed between the lugs and the extension block.

[0007] In some embodiments, the lug is provided with a pin hole.

[0008] In some embodiments, the extension block is provided with a positioning groove, and a positioning block is formed on one side of the card plate. The card plate needs to cooperate with both the positioning groove and the connecting groove at the same time.

[0009] In some embodiments, the profile of the card plate is equal to the profile of the lug and the extension block.

[0010] In some embodiments, an annular positioning surface is formed inside the extension connector, and one end of the extension tube can abut against the positioning surface.

[0011] In some embodiments, the limiting blocks are cylindrical or rectangular in shape and there are two of them, and the extension tube has limiting holes corresponding to the number of limiting blocks.

[0012] The beneficial effects of this application are as follows: by connecting the extension tube to the extension connector and aligning the limiting hole with the connecting groove, the clamping plate is inserted into the connecting groove. Under the action of the positioning block and the positioning surface, the limiting block under the clamping plate can naturally enter the limiting groove, preventing the extension tube from moving and completing the connection. The clamping cooperation between the clamping plate and the connecting groove can complete the limiting of the extension tube. The structure is simple and effective, and the extension tube only needs to have a few small holes, which effectively simplifies the manufacturing process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of this application.

[0015] Figure 2 This is a schematic diagram of the exploded structure of this application.

[0016] Figure 3 This is a cross-sectional structural diagram of this application.

[0017] The following are the reference numerals: 1. Extension tube; 11. Limiting hole; 2. Extension connector; 21. Connecting groove; 22. Lug; 221. Pin hole; 23. Extension block; 231. Positioning groove; 24. Positioning surface; 3. Clamping plate; 31. Limiting block; 32. Positioning block. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0019] In the embodiments of this application, please refer to Figure 1-3As shown, this application provides a connection structure for an extension rod of a power tool, mainly including: an extension tube 1 with a limiting hole 11 on its outer periphery; an extension connector 2, one end of which is connected to the extension tube 1, and a radially extending connecting groove 21 is provided on the outer periphery of the extension connector 2; and a retaining plate 3, which can be inserted into the connecting groove 21 and locked in place with the connecting groove 21, and a retaining block 31 is provided at the bottom of the retaining plate 3 that can enter the limiting hole 11.

[0020] Specifically, when it is necessary to install the extension tube 1, the extension tube 1 is inserted into the extension connector 2 with the limiting hole 11 on one side, and the limiting hole 11 is aligned with the connecting groove 21. At this time, the bottom of the clamping plate 3 is aligned with the connecting groove 21. Under the positioning cooperation, the limiting block 31 under the clamping plate 3 is inserted into the limiting hole 11 by directly pressing or with the help of a tool. At this time, the extension tube 1 will not move around under the action of the limiting block 31, and the clamping plate 3 can ensure that the extension tube 1 will not shake.

[0021] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0022] Reference Figure 1 As shown, the extension connector 2 has two radial lugs 22, and an extension block 23 is provided between the lugs 22. The connecting groove 21 is opened from the middle of the lugs 22 and the extension block 23. The presence of the extension block 23 and the lugs 22 can increase the force range of the card plate 3, make the edge of the connecting groove 21 more robust, and avoid deformation of the connecting groove 21 due to long-term insertion and removal of the card plate 3.

[0023] Reference Figure 2 As shown, the lug 22 has a pin hole 221. A pin can be installed in the pin hole 221 to pass through the card plate 3 and the lug 22, which further improves the connection reliability and ensures that the card plate 3 will not detach from the connecting groove 21 under high frequency vibration. At the same time, the pin can be installed in the pin hole 221 for a long time. When disassembly is required, the pin is pulled out first, and then the card plate 3 is pulled out.

[0024] Preferably, in order to ensure that the radial distance of the card plate 3 can be accurately inserted into the limiting hole 11, the extension block 23 is provided with a positioning groove 231, and a positioning block 32 is formed on one side of the card plate 3. The card plate 3 needs to cooperate with both the positioning groove 231 and the connecting groove 21 at the same time.

[0025] Preferably, the outline of the card plate 3 is equal to the outline of the lug 22 and the extension block 23, so that the card plate 3 becomes flush with the lug 22 and the extension block 23 after being inserted into the connecting groove 21. The flush outline design not only improves the aesthetics, but also reduces the risk of bumps and knocks during use.

[0026] Specifically, in order to position the limiting hole 11 directly below the limiting block 31 of the card plate 3 and to position it radially, an annular positioning surface 24 is formed inside the extension connector 2. One end of the extension tube 1 can abut against the positioning surface 24. When the extension tube 1 abuts against the positioning surface 24, the radial coordinate of the limiting hole 11 on the extension connector 2 corresponds to the limiting block 31.

[0027] Preferably, the limiting block 31 is cylindrical or rectangular and there are two of them. The extension tube 1 has limiting holes 11 corresponding to the number of limiting blocks 31. The cylindrical limiting block 31 has low insertion resistance and is easy to disassemble and assemble, while the rectangular limiting block 31 can prevent relative rotation between the extension tube 1 and the extension connector 2 and ensure connection stability.

[0028] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A connection structure for an extension rod of a power tool, characterized in that, include: The extension tube has a limiting hole on its outer circumference; An extension connector, one end of which is connected to an extension tube, has a radially extending connecting groove on its outer periphery; The card plate is capable of being inserted into the connecting slot and engaging with it. The bottom of the card plate is provided with a limiting block that can enter the limiting hole.

2. The connection structure of a power tool extension rod according to claim 1, characterized in that, The extension connector has two radial lugs, and an extension block is provided between the lugs. The connecting groove is formed between the lugs and the extension block.

3. The connection structure of a power tool extension rod according to claim 2, characterized in that, The lug has a pin hole.

4. The connection structure of a power tool extension rod according to claim 2, characterized in that, The extension block has a positioning groove, and a positioning block is formed on one side of the card plate. The card plate needs to cooperate with both the positioning groove and the connecting groove at the same time.

5. The connection structure of a power tool extension rod according to claim 2, characterized in that, The outline of the card plate is equal to the outline of the lug and the extension block.

6. The connection structure of a power tool extension rod according to claim 1, characterized in that, The interior of the extension connector forms an annular positioning surface, and one end of the extension tube can abut against the positioning surface.

7. The connection structure of a power tool extension rod according to claim 1, characterized in that, The limiting blocks are cylindrical or rectangular in shape and there are two of them. The extension tube has limiting holes corresponding to the number of limiting blocks.

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