Fixing tool for fatigue test of electric hammer

Abstract

The utility model belongs to the technical field of clamp tools, and particularly relates to a fixing tool for an electric hammer fatigue test. The electric hammer fatigue testing device is compact in overall structure and convenient to disassemble and assemble, the base platform is fixedly connected with the installation back plate, the upper top plate, the fastening pressing plate, the shaft body clamping plate and the drill bit insert plate are reasonably arranged on the installation back plate, an electric hammer to be tested can be reliably fixed, rotation and shaking of the electric hammer can be prevented, and it is guaranteed that an electric hammer fatigue test is conducted stably; the accuracy of a test result and the safety of a test process are improved; according to the utility model, a plurality of groups of threaded holes with different heights are formed in the mounting back plate and are matched with the connecting bolts, so that the mounting heights of the upper top plate, the fastening pressing plate, the shaft body clamping plate and the drill bit insert plate can be conveniently adjusted, the mounting of various electric hammers with different sizes can be further adapted, the remodeling efficiency of the electric hammers is greatly improved, and the operation of testers is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of fixtures and tools, and in particular relates to a fixing tool for electric hammer fatigue test. Background Art

[0002] Electric hammer is a kind of electric drill. Its drill bit generates rapid reciprocating motion along the shaft while rotating, so it can quickly make large holes in materials such as cement concrete and stone. The working state of electric hammer can be both impact and rotation. Generally, the hammer mechanism of electric hammer is equipped with a safety clutch to protect the user. Testing the fatigue strength of electric hammer is to detect the fatigue limit of the safety clutch.

[0003] The existing technology usually uses a manually held electric hammer for operation and testing. Since the electric hammer will generate vibration and shaking when working, it requires a high level of skill from the operator. At the same time, there is a reaction force, which may cause harm to the human body. Therefore, it is urgent to develop a clamp to fix the electric hammer to make the detection process smooth and safe. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a fixing tool for electric hammer fatigue test, which has a compact structure, can reliably fix the electric hammer to be tested, ensure the electric hammer fatigue test is carried out smoothly, is easy to disassemble and assemble, and can adapt to the installation of electric hammers of various sizes.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A fixed tool for electric hammer fatigue test, comprising a base platform 1 and a mounting back plate 2, wherein the mounting back plate 2 is vertically fixedly mounted on the side of the base platform 1, and an upper top plate 3, a fastening pressure plate 4, a shaft clamping plate 5 and a drill insert plate 6 are sequentially mounted on the end surface of the mounting back plate 2 from top to bottom, the clamping size of the shaft clamping plate 5 is adapted to the outer diameter size of the electric hammer 8 to be tested, the spacing between the upper top plate 3 and the drill insert plate 6 is adapted to the overall length of the electric hammer 8 to be tested, and a switch contact pin 7 is rotatably mounted on the end of the upper top plate 3, one end of the switch contact pin 7 is connected to the rotating shaft of the fatigue test equipment, and the other end is directly opposite to the start and stop button of the electric hammer 8 to be tested.

[0007] Furthermore, the shaft clamping plate 5 is composed of two semicircular arc clamping plates connected by fastening bolts, and is used to clamp the middle part of the hammer body of the electric hammer 8 to be tested.

[0008] Furthermore, the upper top plate 3 and the drill insert plate 6 are respectively pressed against the tail handle and the top of the drill bit of the electric hammer 8 to be tested.

[0009] Further, the drill bit insert plate 6 includes a lower top plate 13 fixedly installed on the mounting back plate 2. A drill bit insert 12 is fixedly connected above the lower top plate 13. A polygonal counterbore having a shape consistent with that of the drill bit is formed at the center of the top of the drill bit insert 12. The top of the drill bit of the electric hammer 8 to be tested is inserted into the polygonal counterbore and abuts against the lower top plate 13.

[0010] Further, the fastening pressure plate 4 covers the upper part of the hammer body of the electric hammer 8 to be tested and presses the hammer body of the electric hammer 8.

[0011] Further, a fixing plate 11 is vertically arranged on the side end surface of the base platform 1. Multiple groups of threaded holes 9 with different sizes are formed on the end surface of the fixing plate 11.

[0012] Further, the mounting back plate 2 is fixedly installed on the end surface of the fixing plate 11 by matching a connecting bolt with a threaded hole 9 of corresponding size.

[0013] Further, multiple groups of threaded holes 10 are formed at different heights along the vertical direction of the mounting back plate 2.

[0014] Further, the upper top plate 3, the fastening pressure plate 4, the shaft body clamping plate 5, and the drill bit insert plate 6 are respectively fixedly installed at corresponding heights on the mounting back plate 2 by matching connecting bolts with the corresponding threaded holes 10.

[0015] The present utility model has the following main advantages compared with the prior art:

[0016] 1. The overall structure of the present utility model is compact and convenient for disassembly and assembly. By fixedly connecting the base platform with the mounting back plate and reasonably arranging the upper top plate, the fastening pressure plate, the shaft body clamping plate, and the drill bit insert plate on the mounting back plate, the electric hammer to be tested can be reliably fixed, preventing its rotation and shaking, ensuring the smooth progress of the electric hammer fatigue test, and improving the accuracy of the test results and the safety of the test process.

[0017] 2. Multiple groups of threaded holes with different heights are formed on the mounting back plate of the present utility model. In cooperation with the connecting bolts, the installation heights of the upper top plate, the fastening pressure plate, the shaft body clamping plate, and the drill bit insert plate can be conveniently adjusted, and thus the installation of electric hammers of various different sizes can be adapted, greatly improving the electric hammer model change efficiency and facilitating the operation of the test personnel. Description of the Drawings

[0018] Figure 1 It is the front view of the fixing tool for electric hammer fatigue test in the embodiment of the present utility model;

[0019] Figure 2 It is the side view of the fixing tool for electric hammer fatigue test in the embodiment of the present utility model.

[0020] In the figure: 1 - base platform; 2 - mounting backplate; 3 - upper top plate; 4 - fastening pressure plate; 5 - shaft body splint; 6 - drill bit insert plate; 7 - switch contact pin; 8 - electric hammer to be tested; 9 - first threaded hole; 10 - second threaded hole; 11 - fixing plate; 12 - drill bit insert; 13 - lower top plate. Specific implementation manner

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0023] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application 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 thus should not be construed as a limitation of the present application.

[0025] The features and performance of the present application will be further described in detail below in conjunction with the embodiments.

[0026] Embodiment 1. This embodiment provides a fixing tooling for electric hammer fatigue test, as Figures 1-2As shown, it includes a base platform 1 and a mounting back plate 2, the mounting back plate 2 is vertically fixedly installed on the side of the base platform 1, and the end surface of the mounting back plate 2 is sequentially installed with an upper top plate 3, a fastening pressure plate 4, a shaft clamping plate 5 and a drill insert plate 6 from top to bottom, the clamping size of the shaft clamping plate 5 is adapted to the outer diameter size of the electric hammer 8 to be tested, the spacing between the upper top plate 3 and the drill insert plate 6 is adapted to the overall length of the electric hammer 8 to be tested, and a switch contact pin 7 is rotatably installed at the end of the upper top plate 3, one end of the switch contact pin 7 is connected to the rotating shaft of the fatigue test equipment, and the other end is directly opposite to the start and stop button of the electric hammer 8 to be tested.

[0027] Furthermore, the shaft clamping plate 5 is composed of two semicircular arc clamping plates connected by fastening bolts, and is used to clamp the middle part of the hammer body of the electric hammer 8 to be tested.

[0028] Furthermore, the upper top plate 3 and the drill insert plate 6 are respectively pressed against the tail handle and the top of the drill bit of the electric hammer 8 to be tested.

[0029] Furthermore, the drill insert plate 6 includes a lower top plate 13 fixedly mounted on the mounting back plate 2, a drill insert 12 is fixedly connected to the top of the lower top plate 13, and a polygonal countersunk hole with a shape consistent with the drill bit is opened at the center of the top of the drill insert 12; the top of the drill bit of the electric hammer 8 to be tested is inserted into the polygonal countersunk hole and pressed against the lower top plate 13.

[0030] Furthermore, the fastening pressing plate 4 is covered on the upper part of the hammer body of the electric hammer 8 to be tested, and presses the hammer body of the electric hammer 8 to be tested.

[0031] Furthermore, a fixing plate 11 is vertically arranged on the side end surface of the base platform 1, and a plurality of groups of threaded holes 9 of different sizes are opened on the end surface of the fixing plate 11.

[0032] Furthermore, the mounting back plate 2 is fixedly mounted on the end surface of the fixing plate 11 by means of connecting bolts that cooperate with threaded holes 9 of corresponding sizes.

[0033] Furthermore, the mounting back plate 2 is provided with a plurality of groups of threaded holes 10 at different vertical heights.

[0034] Furthermore, the upper top plate 3, the fastening pressure plate 4, the shaft body clamping plate 5 and the drill insert plate 6 are fixedly installed at corresponding heights on the mounting back plate 2 by connecting bolts and cooperating with corresponding threaded holes 10 respectively.

[0035] Embodiment 2: This embodiment provides a fixing fixture for electric hammer fatigue test, including a base platform 1, a mounting back plate 2, an upper top plate 3, a fastening pressure plate 4, a shaft clamp 5, a drill insert plate 6, and a switch contact pin 7.

[0036] The base platform 1 is a triangular bracket-shaped structure, and its corners and sharp edges are rounded; one side of the base platform 1 is connected to the mounting back plate 2, and the mounting back plate 2 is rectangular.

[0037] Furthermore, a top plate 3 is mounted on the upper portion of the mounting back plate 2, and the top plate 3 is a boss-shaped mounting back plate 2;

[0038] The middle of the mounting back plate 2 is provided with an axle body clamping plate 5, and the axle body clamping plate 5 is divided into two semicircular arc clamping plates fastened by bolts;

[0039] A drill insert plate 6 is mounted at the lower portion of the mounting back plate 2 , and a hexagonal countersunk hole is disposed in the middle of the insert of the drill insert plate 6 .

[0040] Furthermore, a switch contact pin 7 is installed at the start and stop button of the electric hammer 8. The switch contact pin 7 is rotatably installed on the boss portion of the upper top plate 3, and the switch contact pin 7 is L-shaped and connected to the driving shaft of the fatigue test equipment.

[0041] The specific working principle is:

[0042] When the electric hammer starts the fatigue test, first, press the tail handle of the electric hammer 8 to be tested against the top plate 3, then use the shaft clamp 5 to clamp and lock the main cylinder of the electric hammer 8 to be tested, then insert the drill bit of the electric hammer 8 to be tested into the middle countersunk hole of the drill bit insert plate 6, and then cover the fastening pressure plate 4 on the outside of the electric hammer 8 to be tested and press it to fix it, finally adjust the angle of the switch contact pin 7 to align it with the center of the start and stop button of the electric hammer 8 to complete the installation and fixation of the electric hammer 8 to be tested.

[0043] Furthermore, all parts involved in this application that are not described in detail are the same as the prior art or are implemented using the prior art.

[0044] In summary:

[0045] 1. The utility model has a compact overall structure and is easy to disassemble and assemble. It is fixedly connected to the mounting back plate through the base platform, and the top plate, fastening plate, shaft body clamping plate and drill bit insert plate are reasonably arranged on the mounting back plate. The electric hammer to be tested can be reliably fixed to prevent it from rotating and shaking, ensuring that the electric hammer fatigue test is carried out smoothly, so as to improve the accuracy of the test results and the safety of the test process;

[0046] 2. The mounting back plate of the utility model is provided with a plurality of groups of threaded holes of different heights, which, in combination with connecting bolts, can conveniently adjust the mounting heights of the upper plate, the fastening pressure plate, the shaft body clamping plate and the drill insert plate, thereby being able to adapt to the installation of electric hammers of various sizes, greatly improving the efficiency of electric hammer replacement and facilitating the operation of test personnel.

[0047] The above embodiments are only used to illustrate the design concept and features of the present utility model, and the purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. The protection scope of the present utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made according to the principles and design concepts disclosed by the present utility model are within the protection scope of the present utility model.

Claims

1. A fixed fixture for electric hammer fatigue test, characterized in that: The invention comprises a base platform (1) and a mounting back plate (2), wherein the mounting back plate (2) is vertically fixedly mounted on the side of the base platform (1), and an upper top plate (3), a fastening pressure plate (4), a shaft clamping plate (5) and a drill insert plate (6) are sequentially mounted on the end surface of the mounting back plate (2) from top to bottom, the clamping size of the shaft clamping plate (5) is matched with the outer diameter size of the electric hammer (8) to be tested, the spacing between the upper top plate (3) and the drill insert plate (6) is matched with the overall length of the electric hammer (8) to be tested, and a switch contact pin (7) is rotatably mounted on the end of the upper top plate (3), one end of the switch contact pin (7) is connected to the rotating shaft of the fatigue test equipment, and the other end is directly opposite to the start / stop button of the electric hammer (8) to be tested.

2. The fixing device for electric hammer fatigue test according to claim 1, characterized in that: The shaft clamping plate (5) is composed of two semicircular arc clamping plates connected by fastening bolts, and is used to clamp the middle part of the hammer body of the electric hammer (8) to be tested.

3. The fixing device for electric hammer fatigue test according to claim 1, characterized in that: The upper top plate (3) and the drill bit insert plate (6) are respectively pressed against the tail handle and the top of the drill bit of the electric hammer (8) to be tested.

4. A fixture for electric hammer fatigue test according to claim 3, characterized in that: The drill insert plate (6) comprises a lower top plate (13) fixedly mounted on the mounting back plate (2); a drill insert (12) is fixedly connected to the top of the lower top plate (13); a polygonal countersunk hole having a shape consistent with that of the drill bit is provided at the center of the top of the drill insert (12); the top of the drill bit of the electric hammer (8) to be tested is inserted into the polygonal countersunk hole and pressed against the lower top plate (13).

5. The fixing device for electric hammer fatigue test according to claim 1, characterized in that: The fastening pressing plate (4) is arranged to cover the upper part of the hammer body of the electric hammer (8) to be tested, and presses the hammer body of the electric hammer (8) to be tested.

6. The fixing device for electric hammer fatigue test according to claim 1, characterized in that: A fixing plate (11) is vertically arranged on the side end surface of the base platform (1), and a plurality of groups of threaded holes (9) of different sizes are provided on the end surface of the fixing plate (11).

7. A fixture for electric hammer fatigue test according to claim 6, characterized in that: The mounting back plate (2) is fixedly mounted on the end surface of the fixing plate (11) by means of connecting bolts that cooperate with threaded holes (9) of corresponding sizes.

8. The fixing device for electric hammer fatigue test according to claim 1, characterized in that: The mounting back plate (2) is provided with a plurality of groups of threaded holes (10) at different vertical heights.

9. The fixing device for electric hammer fatigue test according to claim 8, characterized in that: The upper top plate (3), the fastening pressure plate (4), the shaft body clamping plate (5) and the drill bit insert plate (6) are respectively fixedly mounted at corresponding heights on the mounting back plate (2) by means of connecting bolts that cooperate with corresponding threaded holes (10).

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