Reciprocating driving knocking mechanism for hammer fatigue test

Abstract

The utility model discloses a reciprocating driving knocking mechanism for a hammer fatigue test, which comprises a base and a reciprocating knocking mechanism arranged at the top of the base, and the reciprocating knocking mechanism consists of a bottom plate sliding seat, a supporting sliding table, a triangular transmission block and a limiting frame body; the supporting sliding table is slidably arranged on the bottom plate sliding seat, the lower right corner of an upper vertical plate of the supporting sliding table is hinged to the right end of the back side limiting frame body, and the left end of the limiting frame body is detachably connected with a to-be-tested conjoined hammer. The triangular transmission block is movably arranged in the limiting frame body, a center shaft on the triangular transmission block is connected with the manual gear speed regulator, and a swing shaft on the back face of the triangular transmission block is embedded in a limiting groove in the left end of the upper vertical plate. According to the utility model, the knocking frequency and strength of the hammer during testing can be flexibly adjusted, and the knocking strength can be synchronously adjusted through cooperation of the manual gear speed regulator and the knocking evaluation rate, so that the accuracy and reliability of testing are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of hardware tools and relates to a hammer testing device, in particular to a reciprocating driving striking mechanism for hammer fatigue testing. Background Art

[0002] Hammers, a common hardware item in everyday life, are tools used to strike objects to move or deform them. They are most commonly used to hammer nails, straighten objects, or knock them apart. To ensure the basic safety of hammers during use and prevent the hammer head and handle from falling off during use, which could pose a safety hazard, hammer manufacturers are required to conduct random inspections and safety tests on their products before they leave the factory. This safety test simulates actual usage scenarios by performing continuous hammer strikes to verify whether the hammer head is deformed or cracked after the test, and to detect any looseness between the handle and hammer head.

[0003] The hammer impact test devices currently used by hammer manufacturers generally use a drive motor to drive the hammer to circulate with its tail end as the center point. The hammer head strikes once every rotation, which has a slow striking frequency and low test efficiency. Some test devices also use gear meshing and utilize the forward and reverse rotation of the motor to drive the hammer to swing up and down. This test method has high requirements on the performance of the motor, is prone to failure, cannot guarantee the accuracy and reliability of the test, and has limited applicability. Utility Model Content

[0004] In order to solve the above technical defects of the existing hammer striking test device, the utility model provides a reciprocating driven striking mechanism for hammer fatigue testing.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a reciprocating driven striking mechanism for a hammer fatigue test, comprising a base and a reciprocating striking mechanism installed on the top of the base, the reciprocating striking mechanism consisting of a bottom plate slide, a supporting slide, a triangular transmission block and a limit frame; the supporting slide is slidably arranged on the bottom plate slide, the lower right corner of the upper vertical plate thereof is hingedly connected to the right end of the limit frame on the back side, and the left end of the limit frame is detachably connected to a one-piece hammer to be tested; the triangular transmission block is movably arranged in the limit frame, the central axis thereof is connected to the manual gear speed regulator, and the swing axis on the back is embedded in the limit groove at the left end of the upper vertical plate.

[0007] Preferably, the cross section of the base is I-shaped, a notch is provided on the top right end surface thereof, and a motor mounting plate for mounting the drive motor is provided at the bottom of the notch.

[0008] Preferably, it also includes a box body installed on the top of the base, the inner cavity of the box body is divided by a partition into a first bin body and a second bin body arranged on the left and right, the front end of the second bin body is open, and the reciprocating knocking mechanism is installed therein.

[0009] Preferably, it further comprises a power speed regulating mechanism installed in the first compartment, wherein:

[0010] One end of the power speed regulating mechanism is connected to the driving motor, and the other end is connected to the reciprocating knocking mechanism through the manual gear speed regulator thereon.

[0011] Preferably, the power speed regulating mechanism includes a first transition shaft, a manual gear speed regulator, a second transition shaft and a third transition shaft, wherein:

[0012] The manual gear speed regulator is arranged on the top of the box body, and both ends of the first transition shaft, the second transition shaft and the third transition shaft are respectively installed in parallel in the first compartment body through bearings;

[0013] One end of the first transition shaft is in driving connection with the output shaft of the drive motor, and the other end is in driving connection with the input shaft of the manual gear regulator;

[0014] One end of the second transition shaft is transmission-connected to the output shaft of the manual gear speed regulator, and the other end is transmission-connected to the third transition shaft; and the outer end of the third transition shaft is connected to the central shaft via a coupling.

[0015] Preferably, the first transition shaft, manual gear speed regulator, second transition shaft and third transition shaft are respectively connected by corresponding transmission gears and transmission chains, or respectively connected by synchronous wheels and synchronous belts; and a speed sensor is provided at one end of the third transition shaft.

[0016] Preferably, the supporting slide comprises a slide body, an upper vertical plate and a side support seat, wherein:

[0017] The upper vertical plate and the side support seat are vertically arranged on the top of the slide body, and an axial hole is opened at the lower right corner of the upper vertical plate corresponding to the position of the side support seat, and the left end is opened with the vertically arranged limiting groove.

[0018] Preferably, the central axis and the swing axis are respectively provided on the front and back sides of the triangular transmission block and are arranged diagonally.

[0019] Preferably, the limit frame is a square frame structure, in which the triangular transmission block is movably arranged, a hinge block with a hole is arranged in the lower right corner, and the upper left corner is detachably connected to the one-piece hammer to be tested through a C-shaped bracket, a pressure plate, a limit bolt and a locking nut.

[0020] Preferably, an inverted U-shaped bracket is provided at the top of the front end of the C-shaped bracket, a limiting column is movably provided in the through hole of the inverted U-shaped bracket, and a second buffer spring is sleeved on the lower end of the limiting column.

[0021] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0022] The utility model discloses a reciprocating driven striking mechanism for hammer fatigue testing, which is mainly composed of a base, a box body, a power speed regulating mechanism, a reciprocating striking mechanism and a driving motor. By arranging a manual gear speed regulator on the power speed regulating mechanism, the frequency and strength of the hammer striking during the test can be flexibly adjusted to ensure the accuracy and reliability of the test. At the same time, a reciprocating striking mechanism with a specific structural design is adopted, which utilizes a triangular transmission block to drive the hammer to be tested, which is detachable at the front end of the limit frame, to perform a continuous cyclic action of tilting upward, extending and lifting, and then tilting downward to return and strike. The striking strength can be synchronously adjusted by the manual gear speed regulator in conjunction with the striking frequency, thereby ensuring the accuracy and reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional structure diagram of a reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure inside the box of a reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the structure inside the box of a reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the structure of the base of a reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the structure of the base of a reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 2 ;

[0028] Figure 6 This is a schematic diagram of the structure of the power speed regulating mechanism in the reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 1 ;

[0029] Figure 7 This is a schematic diagram of the structure of the power speed regulating mechanism in the reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 2 ;

[0030] Figure 8 This is a schematic diagram of the structure of the power speed regulating mechanism in the reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 4 ;

[0031] Figure 9 This is a schematic diagram of the structure of the reciprocating striking mechanism in the reciprocating driving striking mechanism for hammer fatigue testing of the utility model. Figure 1 ;

[0032] Figure 10 This is a schematic diagram of the structure of the reciprocating striking mechanism in the reciprocating driving striking mechanism for hammer fatigue testing of the utility model. Figure 2 ;

[0033] Figure 11 This is a schematic diagram of the structure of the triangular transmission block and the limit frame in the reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 1 ;

[0034] Figure 12 This is a schematic diagram of the structure of the triangular transmission block and the limit frame in the reciprocating drive striking mechanism for hammer fatigue testing in this utility model. Figure 2 . DETAILED DESCRIPTION

[0035] The present invention will be described in detail and specifically below through specific embodiments to facilitate a better understanding of the present invention. However, the following embodiments do not limit the scope of the present invention.

[0036] In some embodiments, as Figure 1 、 Figure 2 and Figure 3 As shown, a reciprocating driven striking mechanism for hammer fatigue testing is provided. In order to realize the striking test of the hammer 900 to be tested, the testing machine mainly includes a base 100, a box 200, a power speed regulating mechanism 300, a reciprocating striking mechanism 400, a striking test table 500, a tool storage box 600, a driving motor 700 and a controller 800.

[0037] like Figure 4 and Figure 5 As shown, the cross section of the base 100 is I-shaped and is made of welded steel structure. A notch 101 is provided on the right end face of the top thereof. A motor mounting plate 102 for mounting the drive motor 700 is provided at the bottom of the notch 101. The drive motor 700 is partially hidden and installed in the notch 101.

[0038] like Figure 2 and Figure 3As shown, the box body 200 is arranged at the right end position of the top of the base 100. The box body 200 is designed as a double-bin structure, and the power speed regulation mechanism 300 and the reciprocating knocking mechanism 400 are respectively arranged in its left and right cavities.

[0039] Specifically, the box body 200 is made of spliced ​​plates, and its inner cavity is divided into a first compartment 202 and a second compartment 203 arranged on the left and right by a partition 201. The power speed regulating mechanism 300 and the drive motor 700 are installed in the first compartment 202; the front end of the second compartment 203 is open, and the reciprocating knocking mechanism 400 is installed therein.

[0040] One end of the power speed regulating mechanism 300 is connected to the driving motor 700 , and the other end is connected to the reciprocating knocking mechanism 400 through the manual gear speed regulator 320 thereon, and the knocking frequency of the reciprocating knocking mechanism 400 is adjusted by the manual gear speed regulator 320 .

[0041] The knock test platform 500 is made of plastic or rubber, and is topped with a knock pad 501 made of metal, such as steel. Second buffer springs 502 are positioned at the four corners of the bottom of the knock test platform 500 as needed. The lower ends of the second buffer springs 502 are embedded in corresponding grooves on the top of the base 100 to provide a buffering effect.

[0042] The tool storage box 600 is fixedly mounted on the top left end surface of the base 100 with screws and is located at the rear side of the knock test table 500. Several hammers 900 to be tested are placed therein, and it is also convenient for storing other tools.

[0043] The controller 800 is located on the front side wall of the housing 200 and is a PLC controller. It is electrically connected to the drive motor 700 and the speed sensor 334 . It is used to control the start and stop of the drive motor 700 or flexibly adjust the operating power of the drive motor 700 according to the speed sensor 334 .

[0044] like Figure 6 、 Figure 7 and Figure 8 As shown, the power speed regulating mechanism 300 mainly comprises a first transition shaft 310 mounted on the housing 200, a manual gear speed regulator 320, a second transition shaft 330, a third transition shaft 340, and corresponding transmission gears and chains. The manual gear speed regulator 320 is mounted on the top of the housing 200, and both ends of the first transition shaft 310, the second transition shaft 330, and the third transition shaft 340 are respectively mounted parallel to each other within the first housing 202 via bearings.

[0045] One end of the first transition shaft 310 is connected to the transmission gear 701 on the output shaft of the drive motor 700 via a transmission gear 311 mounted thereon via a transmission chain 702. The other end of the first transition shaft 310 is connected to the transmission gear 321 on the input shaft of the manual gear speed regulator 320 via a transmission gear 312 mounted thereon via a transmission chain 313. The power of the drive motor 700 is transmitted to the manual gear speed regulator 320 via the transmission of the first transition shaft 310 for power distribution, and the manual gear speed regulator 320 performs gear switching.

[0046] The transmission gear 322 on the output shaft of the manual gear speed regulator 320 is in transmission connection with a transmission gear 331 mounted on one end of the second transition shaft 330 via a transmission chain 332. The transmission gear 333 mounted on the outer end of the second transition shaft 330 is in transmission connection with a transmission gear 341 mounted on the outer end of the third transition shaft 340 via a transmission chain 334. The outer end of the third transition shaft 340 is connected to the central shaft 431 via a coupling. This allows the power output from the manual gear speed regulator 320 to be transmitted to the third transition shaft 340 via the second transition shaft 330, thereby synchronously driving the reciprocating striking mechanism 400.

[0047] As described above, the first transition shaft 310, manual gear speed regulator 320, second transition shaft 330, and third transition shaft 340 are connected by corresponding transmission gears and transmission chains. Of course, these transmission gears and transmission chains can be replaced with synchronous belts and synchronous pulleys as needed. A speed sensor 334 is provided at one end of the third transition shaft 340 to detect the speed of the third transition shaft 340 in real time and transmit the detected data to the controller 800.

[0048] like Figure 1 、 Figure 9 and Figure 10 In order to achieve the purpose of the hammer 900 to be tested reciprocatingly striking the test bench 500, a reciprocating striking mechanism 400 with a specific structural design is adopted. The reciprocating striking mechanism 400 mainly consists of a bottom plate slide 410, a support slide 420, a triangular transmission block 430 and a limit frame 440.

[0049] The bottom plate slide 410 is mounted transversely on the base 100, with the middle and rear ends of the bottom plate slide 410 located within the second compartment 203 of the box 200. The support slide 420 is slidably mounted on the bottom plate slide 410. The lower right corner of its upper vertical plate 422 is hingedly connected to the right end of the rear limit frame 440, achieving interlocking motion with the limit frame 440. The left end of the limit frame 440 is detachably connected to the one-piece hammer 900 to be tested.

[0050] The triangular transmission block 430 is movably mounted within the limiting frame 440. A central shaft 431 is connected to the manual gear speed regulator 320, and a swing shaft 432 on the rear side is embedded in a limiting slot 425 at the left end of the upper vertical plate 422. The central shaft 431 and the swing shaft 432 are respectively disposed on the front and back sides of the triangular transmission block 430, and are arranged diagonally at a predetermined distance to ensure that the triangular transmission block 430 has a predetermined swing diameter.

[0051] Specifically, if Figure 9 and Figure 10 As shown, the support slide 420 comprises a slide body 421, an upper plate 422, and a side support seat 424. The slide body 421, upper plate 422, and side support seat 424 are welded together as a single piece. The upper plate 422 and side support seat 424 are vertically mounted on the top of the slide body 421. An axial hole 423 is defined at the lower right corner of the upper plate 422, corresponding to the side support seat 424. A vertically arranged retaining slot 425 is defined at the left end. The axial hole 423 is a circular hole, while the retaining slot 425 is an elongated hole.

[0052] like Figure 11 and Figure 12 As shown, the limiting frame 440 is a square frame structure made of stainless steel or aluminum alloy. A square accommodating cavity is formed within the limiting frame 440, which is used to flexibly accommodate the triangular transmission block 430, which adopts a Lello triangle structure. A hinge block 441 with a hole is provided in the lower right corner of the limiting frame 440 for hinged connection to the shaft hole 423 in the lower right corner of the upper vertical plate 422.

[0053] In order to achieve the installation and fixation of the one-piece hammer 900 to be tested, a locking part consisting of a C-shaped bracket 442, a pressure plate 443, a limiting bolt 444 and a locking nut 445 is provided at the upper left corner of the limit frame 440. The one-piece hammer 900 to be tested can be detachably connected through the C-shaped bracket 442, the pressure plate 443, the limiting bolt 444 and the locking nut 445.

[0054] During use, the rear end of the one-piece hammer 900 to be tested is placed on the C-shaped bracket 442, and the limiting bolt 444 is passed through the rear end through-hole of the one-piece hammer 900 to be tested, and then the locking nut 445 is used to press the pressure plate 443 to one side of the C-shaped bracket 442 to achieve the installation and fixation of the one-piece hammer 900 to be tested before testing; after the test is completed, the locking nut 445 and the pressure plate 443 are manually removed, and the one-piece hammer 900 to be tested can be removed.

[0055] In addition, in order to overcome the recoil force after the tested conjoined hammer 900 strikes the test bench 500, an inverted U-shaped bracket 446 is provided at the front end top of the C-shaped bracket 442, and a limiting column 447 is movably provided in the through hole of the inverted U-shaped bracket 446. The lower end of the limiting column 447 is sleeved with a second buffer spring 448, and the lower end of the limiting column 447 can be abutted against the rear end top of the tested conjoined hammer 900, so as to avoid excessive rebound of the tested conjoined hammer 900 after striking under the buffering action of the second buffer spring 448.

[0056] Combine Figures 1 to 12 The working principle of the reciprocating striking mechanism in the reciprocating driving striking mechanism for hammer fatigue testing is as follows: (1) The one-piece hammer 900 to be tested is manually installed in the C-shaped bracket 442 at the upper left corner of the limit frame 440 and locked with the locking nut 445 and the pressure plate 443. (2) The driving motor 700 is started by the controller 800, and the driving motor 700 transmits power to the manual gear speed regulator 320 through the first transition shaft 310. At this time, the manual gear speed regulator 320 is manually adjusted to gear 0, and the reciprocating striking mechanism 400 does not operate. (3) Manually adjust the manual gear speed regulator 320 to gear 1-2 through the handle 323. At this time, the manual gear speed regulator 320 drives the triangular transmission block 430 to rotate with the central axis 431 as the center point synchronously through the second transition shaft 330 and the third transition shaft 340; (4) During the rotation of the triangular transmission block 430, the swing shaft 432 set on its outer periphery synchronously drives the support slide 420 to move back and forth on the bottom plate slide 410, and at the same time, the tested conjoined hammer 900 at the left end of the limit frame 440 moves up and down to achieve the purpose of cyclically tapping the test bench 500. (5) Increase the test frequency and tapping force as needed. At this time, manually adjust the manual gear speed regulator 320 to gear 3-4 and repeat the above step 4. The frequency and tapping force of the tested conjoined hammer 900 tapping the test bench 500 are increased to meet the diverse test requirements. (6) After the test is completed, remove and replace the next tested conjoined hammer 900 and repeat the above steps.

[0057] While the specific embodiments of the present invention have been described in detail above, these are merely examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, any equivalent changes and modifications made without departing from the spirit and scope of the present invention are intended to be encompassed within the scope of the present invention.

Claims

1. A reciprocating driven striking mechanism for hammer fatigue testing, characterized in that: The invention comprises a base (100) and a reciprocating knocking mechanism (400) installed on the top of the base (100), wherein the reciprocating knocking mechanism (400) is composed of a bottom plate slide (410), a support slide (420), a triangular transmission block (430) and a limit frame (440); the support slide (420) is slidably arranged on the bottom plate slide (410), the lower right corner of the upper vertical plate (422) thereof is hingedly connected to the right end of the limit frame (440) on the back side, and the left end of the limit frame (440) is detachably connected to the one-piece hammer (900) to be tested; the triangular transmission block (430) is movably arranged in the limit frame (440), the central axis (431) on the triangular transmission block is connected to the manual gear speed regulator (320), and the swing axis (432) on the back side is embedded in the limit slot (425) at the left end of the upper vertical plate (422).

2. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 1, characterized in that: The cross section of the base (100) is in an I-shape, and a notch (101) is provided on the right end surface of the top thereof. A motor mounting plate (102) for mounting the drive motor (700) is provided at the bottom of the notch (101).

3. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 1, characterized in that: The invention also includes a box body (200) installed on the top of the base (100), wherein the inner cavity of the box body (200) is divided by a partition (201) into a first bin body (202) and a second bin body (203) arranged on the left and right, and the front end of the second bin body (203) is open, and the reciprocating knocking mechanism (400) is installed therein.

4. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 3, characterized in that: It also includes a power speed regulating mechanism (300) installed in the first bin body (202), wherein: One end of the power speed regulating mechanism (300) is connected to the driving motor (700), and the other end is connected to the reciprocating knocking mechanism (400) through a manual gear speed regulator (320) thereon.

5. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 4, characterized in that: The power speed regulating mechanism (300) comprises a first transition shaft (310), a manual gear speed regulator (320), a second transition shaft (330) and a third transition shaft (340), wherein: The manual gear speed regulator (320) is arranged on the top of the box body (200), and both ends of the first transition shaft (310), the second transition shaft (330) and the third transition shaft (340) are respectively installed in parallel in the first warehouse body (202) through bearings; One end of the first transition shaft (310) is in transmission connection with the output shaft of the drive motor (700), and the other end is in transmission connection with the input shaft of the manual gear speed regulator (320); One end of the second transition shaft (330) is transmission-connected to the output shaft of the manual gear speed regulator (320), and the other end is transmission-connected to the third transition shaft (340); and the outer end of the third transition shaft (340) is connected to the central shaft (431) via a coupling.

6. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 5, characterized in that: The first transition shaft (310), the manual gear speed regulator (320), the second transition shaft (330) and the third transition shaft (340) are respectively connected via corresponding transmission gears and transmission chains, or respectively connected via synchronous wheels and synchronous belts; and a speed sensor (334) is provided at one end of the third transition shaft (340).

7. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 1, characterized in that: The supporting slide (420) includes a slide body (421), an upper vertical plate (422) and a side support seat (424), wherein: The upper vertical plate (422) and the side support seat (424) are vertically arranged on the top of the slide body (421), and an axis hole (423) is opened at the position of the lower right corner of the upper vertical plate (422) corresponding to the side support seat (424), and the left end is opened with the vertically arranged limiting groove (425).

8. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 1, characterized in that: The central axis (431) and the swing axis (432) are respectively arranged on the front and back sides of the triangular transmission block (430) and are arranged diagonally.

9. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 1, characterized in that: The limiting frame (440) is a square frame structure, in which the triangular transmission block (430) is movably arranged, a hinge block (441) with a hole is arranged at the lower right corner, and the upper left corner is detachably connected to the one-piece hammer (900) to be tested via a C-shaped bracket (442), a pressure plate (443), a limiting bolt (444) and a locking nut (445).

10. The reciprocating drive striking mechanism for hammer fatigue testing according to claim 9, characterized in that: An inverted U-shaped bracket (446) is provided at the top of the front end of the C-shaped bracket (442), a limiting column (447) is movably provided in the through hole of the inverted U-shaped bracket (446), and a second buffer spring (448) is sleeved on the lower end of the limiting column (447).

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