Stretching limiting structure of extension rod and long-handle wall grinding machine
By arranging grooves on the extension rod and cooperating with the convex strips of the outer sleeve, the problem of insufficient rigidity caused by excessive extension rod stretching is solved, safe and reliable extension rod limiting is achieved, and the safety and ease of operation of the wall grinder are improved.
Patent Information
- Application Number
- CN202422627373.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The extension rods of existing wall grinders are easily stretched too long, resulting in insufficient rigidity at the connection, posing a risk of damaging the product or injuring people. In addition, the scale lines are easily worn or blocked, making it difficult for users to accurately control the extension length.
A stretching limit structure for an extension rod is designed. By setting a groove on the extension rod and cooperating with the convex strip of the outer sleeve, the maximum stretching distance of the extension rod is limited, and convenient installation and disassembly are achieved through a quick-release structure.
It effectively limits the minimum overlap distance between the extension rod and the main rod, improves the rigidity of the connection, prevents the connection from falling off, improves safety in use, and simplifies the installation process.
Smart Images
Figure CN223455712U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of polishers, in particular to a long-handle wall polisher and a stretching limiting structure of an extension rod. BACKGROUND
[0002] Polishers are used for polishing and polishing objects on the surface, and the polishing objects are generally relatively hard objects. In particular, there is a wall polisher for polishing walls. The wall polisher includes a polisher body, a polishing disc, and a handle. The polisher body is provided with a motor and the like. The motor is used to drive the polishing disc to polish the wall. The wall polisher needs to polish the wall and the ceiling at a high place. Therefore, in order to facilitate the adjustment of the length of the handle of the wall polisher, an extension rod is usually added. The extension rod is telescopically connected with the main rod of the handle, so as to realize the switching between the short handle and the long handle. Since the polisher body is provided with a motor and the like, the weight of the polisher body is relatively large. Therefore, when the user holds the wall polisher at a high place to perform polishing work, if the extension rod is stretched too much and the overlapping length is too short, the rigidity of the connection part of the extension rod is not enough, the weight of the polisher body is too large to manipulate the polisher, and even the extension rod will be separated to cause the polisher body to fall and injure people. However, the products on the market cannot limit the longest distance of the extension rod. Therefore, the user is easy to stretch the extension rod too much, causing the overlapping length of the connection part of the extension rod and the main rod to be too short, the rigidity of the connection part is poor, and the risk of damaging the product or the connection part falling and injuring people is greatly increased.
[0003] There are also some products that print scale lines on the extension rod to prompt the length of the extension rod and mark the limit position of the stretching. However, firstly, the scale lines are easy to be wiped off or blocked due to wear and tear and dust pollution, so that the user cannot easily see the scale lines. Secondly, although the allowable stretching limit position indication line is marked on the extension rod, the user will not pay attention to this point in the actual operation process, and it is still easy to stretch the extension rod too much, causing the overlapping length of the connection part of the extension rod and the main rod to be too short, and the risk of damaging the product or the connection part falling and injuring people still exists. CONTENT OF THE UTILITY MODEL
[0004] In order to solve the above technical problems, the stretching limiting structure of the extension rod is provided.
[0005] In order to achieve the above object, the stretching limiting structure of the extension rod comprises a main rod, an extension rod and an outer sleeve, the main rod is externally provided with an outer shell, the extension rod is telescopically connected to the main rod, the extension rod has a first end close to the main rod and a second end away from the main rod, the outer wall of the extension rod is provided with a long strip-shaped groove, the top end of the groove is away from the first end of the extension rod, the inner wall of the outer sleeve is provided with a convex strip, the outer sleeve is sleeved on the outer periphery of the extension rod and is detachably connected to the outer shell, the convex strip of the outer sleeve is clamped into the groove of the extension rod, the extension rod can reciprocate relative to the main rod and the outer sleeve, and the top end of the groove interferes with the convex strip to limit the limit position of the extension rod.
[0006] Further, the top end of the groove is the end close to the first end of the extension rod, the distance between the top end of the groove and the first end of the extension rod is a safety distance, and the safety distance is the minimum distance at which the main rod and the extension rod coincide.
[0007] Further, the length of the outer sleeve is smaller than the length of the extension rod.
[0008] Further, the groove and the convex strip can be provided with one or more.
[0009] Further, the outer sleeve further comprises a quick release structure, and the extension rod and the main rod are connected and detached through the quick release structure.
[0010] Further, the outer shell is provided with a buckle hole, the outer sleeve comprises a body part and elastic clamps arranged on both sides of the body part, the elastic clamps can be hooked into the buckle hole, so that the outer sleeve is connected with the outer shell.
[0011] Further, the elastic clamp comprises a deformable pressing part and a clamping hook part, the pressing part gradually opens outward in the radial direction, and the clamping hook part extends inward from the end of the pressing part close to the outer shell; the clamping hook part can be opened outward by pressing the pressing part.
[0012] Further, the quick release structure further comprises a locking nut, the locking nut is sleeved on the outer sleeve and located between the pressing part and the body part, so as to prevent the elastic clamp of the outer sleeve from being triggered by mistake.
[0013] Further, the locking nut and the outer sleeve are connected through thread cooperation.
[0014] Further, the utility model discloses a long handle wall polisher, which comprises a polisher main body and the stretching limiting structure of the extension rod.
[0015] Compared with the prior art, the long handle wall surface polisher has the beneficial effects that: the stretching limiting structure of the extension rod can limit the longest distance of the extension rod stretching out, that is, can limit the minimum distance of the extension rod and the main rod coinciding, the distance can ensure the rigidity strength of the connection place of the extension rod and the main rod, avoids the coincidence length of the connection place being too short, easily breaks the product or the connection place falls off and hurts people, and improves the safety performance of the user using the long handle wall surface polisher. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic view of the long handle wall surface polisher in the embodiment of the utility model.
[0017] Figure 2 is a schematic view of the extension rod in the embodiment of the utility model.
[0018] Figure 3 is a schematic view of the outer sleeve in the embodiment of the utility model.
[0019] Figure 4 is a sectional view of the outer sleeve in the embodiment of the utility model.
[0020] Figure 5 is a sectional view of the connection place of the main rod and the extension rod in the embodiment of the utility model.
[0021] Figure 6 is a partial enlarged view of the embodiment of the utility model Figure 5 . DETAILED DESCRIPTION
[0022] The exemplary embodiments will be described in detail herein below with reference to the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The following exemplary embodiments described in the exemplary embodiments do not represent all embodiments consistent with the present application.
[0023] The terms used in the present application are merely for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise defined, technical terms or scientific terms used in the present application should be understood as having the common meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first", "second", and similar terms used in the present application do not represent any order, number, or importance, but are only used to distinguish different components. Similarly, the terms "one" or "a" or similar terms do not represent a quantity limitation, but represent the existence of at least one. "Multiple" or "several" means two or more. Unless otherwise indicated, the terms "front", "back", "lower", and / or "upper" and similar terms are used for convenience and are not intended to be limiting to one position or spatial orientation. The terms "include" or "comprise" and similar terms mean that the elements or objects before the "include" or "comprise" encompass the elements or objects listed after the "include" or "comprise" and equivalents thereof, and do not exclude other elements or objects. The terms "connected" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in the specification and appended claims of the present application are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.
[0024] As shown in Figure 1 The present embodiment discloses a long handle wall polisher 100. The long handle wall polisher 100 comprises a polisher body 1, a supporting arm 4, and a handle. The polisher body 1 comprises a casing 10 and a polishing disc 2, and a motor and a dust collection fan are accommodated in the casing 10. The motor drives the dust collection fan and the polishing disc 2 to rotate. In the present embodiment, the wall polisher is a vertical wall polisher, i.e., the output shaft of the motor is perpendicular to the polishing disc 2.
[0025] The supporting arm 4 comprises two half shells 41, 42, each of which comprises a claw portion 401 and a mounting portion 402. The two half shells 41, 42 are fixedly connected to form a Y-shaped supporting arm 4. One end of each claw portion 401 is connected to the two sides of the polisher body 1. The mounting portion 402 is away from the polisher body 1, and the mounting portions 402 of the two half shells 41, 42 are connected to form a cylindrical shape. The polisher body 1 further comprises a pin shaft 16, and the two claw portions 401 are rotatably connected to the pin shaft 16, so that the supporting arm 4 can rotate relative to the polisher body 1. The handle is mounted and connected to the mounting portion 402, and when a user holds the handle, the angle between the polisher body 1 and the handle can be adjusted through the supporting arm 4.
[0026] In combination Figure 1 and 2As shown, the handle of the long handle wall polisher 100 comprises a main rod 3 and an extension rod 5, the extension rod 5 has a first end 51 close to the main rod 3 and a second end 52 away from the main rod 3, the extension rod 5 is telescopically connected to the main rod 3 from the first end 51, the extension rod 5 can be pulled out of the main rod 3 or retracted into the main rod 3, so as to adjust the length of the handle of the wall polisher 100.
[0027] In order to limit the limit length of the extension rod 5, the wall polisher 100 is also provided with an extension rod 5 stretching limiting structure.
[0028] In this embodiment, as shown, Figure 2 the outer wall of the extension rod 5 is provided with a long strip-shaped groove 50, and the top end of the groove 50 is away from the first end 51 of the extension rod 5. The top end of the groove 50 has a top wall 501.
[0029] Figure 1 As shown in Figure 3 and 4 the extension rod 5 stretching limiting structure also comprises an outer sleeve 6 and an outer housing 7 sleeved on the outer wall of the main rod 3. The outer sleeve 6 is sleeved on the outer wall of the extension rod 5 and can be detachably connected to the outer housing 7. The inner wall of the outer sleeve 6 is provided with a convex strip 60, the top end of the convex strip 60 has an end wall 601, and the convex strip 60 of the outer sleeve 6 is clamped into the groove 50 of the extension rod 5. As shown in Figure 5 and 6 when the outer sleeve 6 is connected to the outer housing 7, the main rod 3 is fixed with the outer housing 7 and the outer sleeve 6, and the extension rod 5 can move back and forth along the convex strip 60 of the outer sleeve 6 through the groove 50 of the extension rod 5, that is, the extension rod 5 can be pulled out or retracted relative to the main rod 3. The groove 50 of the extension rod 5 and the convex strip 60 of the outer sleeve 6 are matched to guide the movement of the extension rod 5. As shown in Figure 6 during the pulling out of the extension rod 5, at the limit position of the pulling out, the top wall 501 at the top end of the groove 50 will abut against the end wall 601 at the top end of the convex strip 60, and the extension rod 5 will be interfered to limit the limit position of the movement of the extension rod 5.
[0030] The extension rod 5 stretching limiting structure can limit the maximum distance of the extension rod 5 stretching out, that is, it can limit the minimum distance L of the extension rod 5 coinciding with the main rod 3, which can ensure the rigidity strength of the connection between the extension rod 5 and the main rod 3, avoid the coincidence length of the connection being too short, easily break the product or the connection falling off and bruising the person, and improve the safety performance of the user using the long handle wall polisher 100.
[0031] In this embodiment, the groove 50 of the extension rod 5 and the convex strip 60 of the outer sleeve 6 are only one, but in other embodiments, the groove 50 and the convex strip 60 can be provided with multiple.
[0032] In the present embodiment, the length of the outer sleeve 6 is less than the length of the extension rod 5. The outer sleeve 6 is sleeved on the extension rod 5 from the second end 52 of the extension rod 5, the convex strip 60 of the outer sleeve 6 is clamped into the groove 50 of the extension rod 5, the outer sleeve 6 is sleeved on the extension rod 5, and the outer sleeve 6 is moved to be close to the first end 51 of the extension rod 5.
[0033] As shown in Figure 5 , the outer shell 7 is sleeved on the tail end of the main rod 3, and a part of the outer shell 7 exceeds the main rod 3. A part of the outer sleeve 6 can be inserted into the part of the outer shell 7 exceeding the main rod 3.
[0034] As shown in Figure 1 and 3 , the wall polishing machine 100 further comprises a quick release structure of the outer sleeve 6, and the outer sleeve 6 is connected and detached with the main rod 3 through the quick release structure. Specifically, the outer sleeve 6 comprises a cylindrical body part 61 and elastic clamps 62 arranged on both sides of the body part 61. The elastic clamps 62 are relatively symmetrical and are arranged at the middle position of the body of the outer sleeve 6. The elastic clamps 62 comprise deformable pressing parts 621 and hook parts 622. The pressing parts 621 gradually open outward in the radial direction, and the hook parts 622 extend inward from the end of the pressing parts 621 close to the outer shell 7. The pressing parts 621 can make the hook parts 622 open outward.
[0035] The outer shell 7 is further provided with buckle holes 70, and the elastic clamps 62 can be hooked into the buckle holes 70, so that the outer sleeve 6 is connected with the outer shell 7, and the outer sleeve 6 is installed and connected to the outer shell 7.
[0036] When the extension rod 5 needs to be installed, the user first sleeves the outer sleeve 6 on the extension rod 5, and moves the outer sleeve 6 to be close to the first end 51 of the extension rod 5. Then, the pressing parts 621 of the elastic clamps 62 are pressed to make the hook parts 622 of the elastic clamps 62 open outward, the extension rod 5 is inserted into the main rod 3, the outer sleeve 6 is inserted into the outer shell 7, and the hook parts 622 of the elastic clamps 62 of the outer sleeve 6 reach the buckle holes 70 of the outer shell 7. Finally, the pressing parts 621 of the elastic clamps 62 are released to make the hook parts 622 of the elastic clamps 62 clamped into the buckle holes 70 of the outer shell 7. The outer sleeve 6 is installed on the outer shell 7, and at this time, the extension rod 5 can move back and forth.
[0037] When the extension rod 5 needs to be detached, the user only needs to press the pressing parts 621 of the elastic clamps 62 to make the hook parts 622 of the elastic clamps 62 disengage from the buckle holes 70 of the outer shell 7, and then pull out the extension rod 5 and the outer sleeve 6 outward, so that the extension rod 5 can be detached from the main rod 3.
[0038] Preferably, as shown in Figure 1 and 5 , the pressing parts 621 of the elastic clamps 62 are provided with a plurality of protrusions 6211 arranged in the radial direction.As shown, the quick release structure further comprises a locking nut 8, which is sleeved on the outer sleeve 6 and located between the pressing portion 621 and the body portion 61 of the outer sleeve 6. The locking nut 8 is connected with the outer sleeve 6 through thread cooperation. When the locking nut 8 is locked to the outer sleeve 6, the locking nut 8 presses against the pressing portion 621 to prevent the elastic clamps 62 of the outer sleeve 6 from being triggered by mistake. When the pressing portion 621 of the elastic clamps 62 needs to be pressed, the locking nut 8 needs to be loosened first, and the locking nut 8 is separated from the pressing portion 621, so that space is provided for the user to press the pressing portion 621. The quick release structure simply and efficiently realizes the installation and dismounting of the extension rod 5 and the main rod 3.
[0039] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application in any form. Although the present application has been disclosed as the above preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical contents without departing from the scope of the technical solution of the present application to obtain equivalent embodiments with equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application shall still fall within the scope of the technical solution of the present application.
Claims
1. A tensile stop structure of an extension rod, characterized by, The application relates to a lengthening rod's stretching limiting structure, which comprises a main rod, a lengthening rod and an outer sleeve, the main rod is externally provided with an outer shell, the lengthening rod is telescopically connected to the main rod, the lengthening rod has a first end close to the main rod and a second end away from the main rod, a long groove is arranged on the outer wall of the lengthening rod, the top end of the groove is away from the first end of the lengthening rod, a convex strip is arranged on the inner wall of the outer sleeve, the outer sleeve is sleeved on the outer wall of the lengthening rod and is detachably connected to the outer shell, the convex strip of the outer sleeve is clamped into the groove of the lengthening rod, the lengthening rod can reciprocally move relative to the main rod and the outer sleeve, and the top end of the groove interferes with the convex strip to limit the limit position of the lengthening rod.
2. The stretch stop structure of an extension rod according to claim 1, wherein The top end of the groove is the end close to the first end of the lengthening rod, the distance between the top end of the groove and the first end of the lengthening rod is a safety distance, and the safety distance is the minimum distance at which the main rod and the lengthening rod are overlapped.
3. The stretch stop structure of an extension rod according to claim 1, wherein The length of the outer sleeve is smaller than the length of the lengthening rod.
4. The stretch stop structure of an extension rod according to claim 1, wherein The groove and the convex strip can be provided with one or more.
5. The stretch stop structure of an extension rod according to claim 1, wherein The outer sleeve further comprises a quick-release structure, and the lengthening rod and the main rod are connected and detached through the quick-release structure.
6. The stretch stop structure of an extension rod according to claim 5, wherein A buckle hole is arranged on the outer shell, the outer sleeve comprises a body part and elastic clamps arranged on both sides of the body part, the elastic clamps can be hooked into the buckle hole, so that the outer sleeve is connected with the outer shell.
7. The stretch stop structure of an extension rod according to claim 6, wherein The elastic clamp comprises a deformable pressing part and a hook part, the pressing part gradually opens outward in the radial direction, and the hook part extends inward from the end of the pressing part close to the outer shell; the hook part can be opened outward by pressing the pressing part.
8. The stretch stop structure of an extension rod according to claim 7, wherein The quick-release structure further comprises a locking nut, the locking nut is sleeved on the outer sleeve and located between the pressing part and the body part, so as to prevent the elastic clamp of the outer sleeve from being triggered by mistake.
9. The stretch stop structure of an extension rod according to claim 8, wherein The locking nut and the outer sleeve are connected through thread cooperation.
10. A pole sander characterized by, The application further relates to a polishing machine, which comprises a main body and the lengthening rod's stretching limiting structure.