Gear-adjustable hammer knocking testing machine

Abstract

The invention belongs to the technical field of hardware tools, and discloses a gear-adjustable hammer knocking testing machine which comprises a base, a box body, a power speed regulating mechanism, a reciprocating knocking mechanism and a driving motor. The reciprocating knocking mechanism is composed of a bottom plate sliding base, a supporting sliding table, a triangular transmission block and a limiting frame. 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 invention, 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 invention belongs to the technical field of hardware tools and relates to a hammer testing device, in particular to a gear-adjustable hammer impact testing machine. Background Art

[0002] As a commonly used hardware, hammers are tools used to hit objects to move or deform them. They are most commonly used to hammer nails, correct or knock objects open. Hammers come in a variety of forms. The most common form is a handle and a top. One side of the top is flat for hitting, and the other side is a hammer head. The shape of the hammer head can be like a horn or a wedge. Its function is to pull out nails. There are also round-headed hammer heads. Hammers are widely used in daily life because of their moderate weight and comfortable feel. They save time and effort for hitting. The hammer head and handle are firmly connected, stable and not easy to fall off.

[0003] In order to ensure the basic safety performance of the hammer during use and prevent the hammer head and hammer handle from falling off during use, causing safety hazards, hammer manufacturers need to conduct random inspections and safety tests before the products leave the factory. The safety test method is to simulate the actual use scenario and use the hammer for uninterrupted tapping tests to verify whether the hammer head is deformed or cracked after the tapping test, and to detect whether there is looseness between the hammer handle and the hammer head.

[0004] The hammer impact test devices currently used by hammer manufacturers generally use a driving motor to drive the hammer to circulate with its tail end as the center point. Each rotation achieves one hammer strike. The frequency of the strikes is slow and the test efficiency is low. Some test devices use gear meshing and use 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 and is prone to failure. In addition, most existing test devices do not have a speed regulating mechanism for the impact frequency, and cannot flexibly adjust the impact frequency according to the test requirements of different hammer types, thereby failing to ensure the accuracy and reliability of the test, and the applicability is limited. Summary of the invention

[0005] In order to solve the above technical defects of the existing hammer impact test device, the present invention provides a gear-adjustable hammer impact test machine.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention is to provide a gear-adjustable hammer percussion tester, comprising a base, a box, a power speed regulating mechanism, a reciprocating percussion mechanism and a driving motor; wherein the box is arranged at the right end position of the top of the base, and the power speed regulating mechanism and the reciprocating percussion mechanism are arranged in the left and right cavities thereof respectively; one end of the power speed regulating mechanism is connected to the driving motor, and the other end is connected to the reciprocating percussion mechanism through a manual gear speed regulator thereon;

[0008] The reciprocating knocking mechanism consists of a base plate slide, a supporting slide, a triangular transmission block and a limit frame; the supporting slide is slidably arranged on the base plate slide, and the lower right corner of its upper vertical plate 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 the one-piece hammer to be tested; the triangular transmission block is movably arranged in the limit frame, and the central axis thereon 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.

[0009] 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.

[0010] Preferably, the inner cavity of the box body is divided into a first compartment body and a second compartment body arranged on the left and right by a partition; wherein:

[0011] The power speed regulating mechanism and the driving motor are installed in the first bin body; the front end of the second bin body is open, and the reciprocating knocking mechanism is installed therein.

[0012] Preferably, the power speed regulating mechanism comprises a first transition shaft, a manual gear speed regulator, a second transition shaft and a third transition shaft, wherein:

[0013] The manual gear speed regulator is arranged on the top of the box body, and the two ends of the first transition shaft, the second transition shaft and the third transition shaft are respectively installed in parallel in the first warehouse body through bearings;

[0014] One end of the first transition shaft is drivingly connected to the output shaft of the drive motor, and the other end is drivingly connected to the input shaft of the manual gear speed regulator;

[0015] One end of the second transition shaft is transmission-connected to the output shaft of the manual gear 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.

[0016] More preferably, the first transition shaft, manual gear speed regulator, second transition shaft and third transition shaft are connected by corresponding transmission gears and transmission chains, or are connected by synchronous wheels and synchronous belts; and a speed sensor is provided at one end of the third transition shaft.

[0017] Preferably, the support slide comprises a slide body, an upper stand and a side support seat, wherein:

[0018] The upper 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 plate corresponding to the position of the side support seat, and the left end is opened with the vertically arranged limiting groove.

[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 at 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] More 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] Preferably, the gear-adjustable hammer impact tester further comprises an impact test table and a tool storage box installed at the left end of the top of the base, wherein:

[0022] A knocking gasket is provided on the top of the knocking test bench, and the lower ends of the second buffer springs at the four corners of the bottom are respectively embedded in the grooves on the top of the base;

[0023] The tool storage box is fixedly mounted on the top left end surface of the base and is located at the rear side of the knock test bench.

[0024] Preferably, the gear-adjustable hammer impact testing machine further comprises a controller disposed on the front side wall of the box, wherein:

[0025] The controller adopts a PLC controller and is electrically connected to the driving motor and the rotation speed sensor respectively.

[0026] The present invention adopts the above technical solution, which has the following technical effects compared with the prior art:

[0027] The gear-adjustable hammer impact tester of the present invention is mainly composed of a base, a box body, a power speed regulating mechanism, a reciprocating impact 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 impact during the test can be flexibly adjusted to ensure the accuracy and reliability of the test; at the same time, a reciprocating impact mechanism with a specific structural design is adopted, and a triangular transmission block is used to drive the detachable hammer to be tested at the front section of the limit frame to perform a continuous periodic action of tilting upward, extending and lifting, and then tilting downward to return and impact. The impact strength can be synchronously adjusted by the manual gear speed regulator in coordination with the impact rate, thereby ensuring the accuracy and reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the main structure of a gear-adjustable hammer impact testing machine of the present invention;

[0029] Figure 2 The three-dimensional structure of a gear-adjustable hammer impact tester of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 3 The three-dimensional structure of a gear-adjustable hammer impact tester of the present invention is shown in FIG. Figure 2 ;

[0031] Figure 4 The structure of the interior of the box of a gear-adjustable hammer impact tester of the present invention is shown in FIG. Figure 1 ;

[0032] Figure 5 The structure of the interior of the box of a gear-adjustable hammer impact tester of the present invention is shown in FIG. Figure 2 ;

[0033] Figure 6 The structure of the interior of the box of a gear-adjustable hammer impact tester of the present invention is shown in FIG. Figure 3 ;

[0034] Figure 7 The structure of the base of the adjustable-position hammer impact tester of the present invention is shown in FIG. Figure 1 ;

[0035] Figure 8 The structure of the base of the adjustable-position hammer impact tester of the present invention is shown in FIG. Figure 2 ;

[0036] Fig. 9 The structure of the power speed regulating mechanism in the gear-adjustable hammer impact testing machine of the present invention is shown in FIG. Figure 1 ;

[0037] Fig.10 The structure of the power speed regulating mechanism in the gear-adjustable hammer impact testing machine of the present invention is shown in FIG. Figure 2 ;

[0038] Fig.11 The structure of the power speed regulating mechanism in the gear-adjustable hammer impact testing machine of the present invention is shown in FIG. Figure 3 ;

[0039] Fig.12 The structure of the power speed regulating mechanism in the gear-adjustable hammer impact testing machine of the present invention is shown in FIG. Figure 4 ;

[0040] Fig.13The structure of the reciprocating striking mechanism in the gear-adjustable hammer striking tester of the present invention is shown in FIG. Figure 1 ;

[0041] Fig.14 The structure of the reciprocating striking mechanism in the gear-adjustable hammer striking tester of the present invention is shown in FIG. Figure 2 ;

[0042] Fig.15 The structure of the triangular transmission block and the limit frame in the gear-adjustable hammer impact tester of the present invention is shown in FIG. Figure 1 ;

[0043] Fig.16 The structure of the triangular transmission block and the limit frame in the gear-adjustable hammer impact tester of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0044] The present invention is described in detail and specifically by specific examples below to provide a better understanding of the present invention, but the following examples do not limit the scope of the present invention.

[0045] In some embodiments, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a gear-adjustable hammer impact tester is provided. In order to realize the impact test of the hammer 900 to be tested, the tester mainly includes a base 100, a box 200, a power speed regulation mechanism 300, a reciprocating impact mechanism 400, an impact test table 500, a tool storage box 600, a drive motor 700 and a controller 800.

[0046] like Figure 7 and Figure 8 As shown, the cross section of the base 100 is I-shaped, and the whole is welded by steel structure, and a notch 101 is opened on the right end face of the top, and a motor mounting plate 102 for mounting the drive motor 700 is arranged at the bottom of the notch 101. The drive motor 700 is partially hidden and installed in the notch 101.

[0047] like Figure 4 , Figure 5 and Figure 6 As 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 the left and right cavities thereof.

[0048] Specifically, the box body 200 is formed by splicing plates, and its inner cavity is divided into a first bin body 202 and a second bin body 203 arranged on the left and right by a partition 201. The power speed regulating mechanism 300 and the driving motor 700 are installed in the first bin body 202; the front end of the second bin body 203 is open, and the reciprocating knocking mechanism 400 is installed therein.

[0049] 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, and the knocking frequency of the reciprocating knocking mechanism 400 is adjusted by the manual gear speed regulator 320 .

[0050] The knock test bench 500 body is made of plastic or rubber, and a knock pad 501 is arranged on the top thereof. The knock pad 501 is made of metal, such as a steel plate. As needed, second buffer springs 502 are respectively arranged at the four corners of the bottom of the knock test bench 500, and the lower ends of the second buffer springs 502 are respectively embedded in the grooves on the top of the base 100 to play a buffering role.

[0051] The tool storage box 600 is fixedly mounted on the top left end surface of the base 100 by screws and is located at the rear side of the knock test table 500. A number of hammers 900 to be tested are placed therein, and other tools can also be stored therein.

[0052] The controller 800 is disposed on the front side wall of the box 200 and adopts a PLC controller, and is electrically connected to the drive motor 700 and the speed sensor 334 respectively, and 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.

[0053] like Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, the power speed regulating mechanism 300 is mainly composed of a first transition shaft 310, a manual gear speed regulator 320, a second transition shaft 330, and a third transition shaft 340 installed on the housing 200, as well as corresponding transmission gears and transmission chains. The manual gear speed regulator 320 is arranged 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 installed in parallel in the first warehouse 202 through bearings.

[0054] One end of the first transition shaft 310 is connected to the transmission gear 701 on the output shaft of the driving motor 700 through the transmission gear 311 sleeved thereon via the 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 through the transmission gear 312 sleeved thereon via the transmission chain 313, so that the power of the driving motor 700 is transmitted to the manual gear speed regulator 320 for power distribution through the transmission of the first transition shaft 310, and the manual gear speed regulator 320 performs gear switching.

[0055] The transmission gear 322 on the output shaft of the manual gear speed regulator 320 is connected to the transmission gear 331 sleeved on one end of the second transition shaft 330 through a transmission chain 332. The transmission gear 333 sleeved on the outer end of the second transition shaft 330 is connected to the transmission gear 341 sleeved on the outer end of the third transition shaft 340 through a transmission chain 334. The outer end of the third transition shaft 340 is connected to the central shaft 431 through a coupling, so that the power output by the manual gear speed regulator 320 is transmitted to the third transition shaft 340 through the transmission of the second transition shaft 330, and the reciprocating knocking mechanism 400 is driven to operate synchronously.

[0056] As mentioned above, the first transition shaft 310, the manual gear speed regulator 320, the second transition shaft 330 and the third transition shaft 340 are connected by corresponding transmission gears and transmission chains, and of course, the transmission gears and transmission chains can be replaced by synchronous belts and synchronous wheels 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 send the detection data to the controller 800.

[0057] like Figure 1 , Figure 2 , Fig.13 and Fig.14 In order to achieve the purpose of the hammer 900 to be tested reciprocatingly striking the test bench 500, the reciprocating striking mechanism 400 with a specific structural design is adopted. The reciprocating striking mechanism 400 is mainly composed of a bottom plate slide 410, a support slide 420, a triangular transmission block 430 and a limit frame 440.

[0058] The bottom plate slide 410 is horizontally mounted on the base 100, and the middle and rear ends of the bottom plate slide 410 are located in the second compartment 203 of the box 200. The support slide 420 is slidably arranged on the bottom plate slide 410, and the lower right corner of the upper plate 422 is hingedly connected to the right end of the back limit frame 440, and is linked 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.

[0059] The triangular transmission block 430 is movably arranged in the limiting frame 440, and the central shaft 431 thereon is connected to the manual gear speed regulator 320, and the swing shaft 432 on the back is embedded in the limiting groove 425 at the left end of the upper vertical plate 422. The central shaft 431 and the swing shaft 432 are respectively arranged on the front and back sides of the triangular transmission block 430, and are arranged diagonally at a certain interval, so that the triangular transmission block 430 has a certain swing diameter.

[0060] Specifically, Fig.13 and Fig.14 As shown, the support slide 420 includes a slide body 421, an upper plate 422 and a side support seat 424, and the slide body 421, the upper plate 422 and the side support seat 424 are welded in an integral structure. The upper plate 422 and the side support seat 424 are vertically arranged on the top of the slide body 421, and an axial hole 423 is opened at the lower right corner of the upper plate 422 corresponding to the position of the side support seat 424, and a vertically arranged limiting groove 425 is opened at the left end. The axial hole 423 is a round hole, and the limiting groove 425 is a long hole.

[0061] like Fig.15 and Fig.16 As shown, the limit frame 440 is a square frame structure, which is made of stainless steel or aluminum alloy. A square accommodating cavity is formed in the frame of the limit frame 440, which is used to movably set the triangular transmission block 430, and the triangular transmission block 430 adopts a Lello triangle structure design. A hinge block 441 with a hole is set at the lower right corner of the limit frame 440, which is used to hinge the shaft hole 423 at the lower right corner of the upper vertical plate 422.

[0062] In order to achieve the installation and fixation of the one-piece hammer 900 to be tested, a locking member 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, and 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.

[0063] When in use, the rear end of the one-piece hammer 900 to be tested is placed on the C-shaped bracket 442, and the limit 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 taken down.

[0064] In addition, in order to overcome the recoil force after the one-piece hammer 900 to be tested hits the test bench 500, an inverted U-shaped bracket 446 is arranged at the front end top of the C-shaped bracket 442, and a limiting column 447 is movably arranged in the through hole of the inverted U-shaped bracket 446, and 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 one-piece hammer 900 to be tested, so as to avoid the transition rebound of the one-piece hammer 900 to be tested after hitting under the buffering action of the second buffer spring 448.

[0065] Combination Figures 1 to 16 The working principle of the reciprocating striking mechanism in the gear-adjustable hammer striking tester 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 is locked by 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 arranged on the outer periphery of the triangular transmission block 430 synchronously drives the support slide 420 to move back and forth on the bottom plate slide 410, and at the same time, the one-piece hammer 900 to be tested at the left end of the limit frame 440 moves up and down to achieve the purpose of cyclically knocking the test bench 500. (5) Increase the test frequency and knocking force as needed. At this time, manually adjust the manual gear speed regulator 320 to gear 3-4, repeat the above step 4, and the frequency and knocking force of the one-piece hammer 900 to be tested knocking the test bench 500 increase to meet the diverse test needs. (6) After the test is completed, remove and replace the next one-piece hammer 900 to be tested, and repeat the above action.

[0066] The specific embodiments of the present invention are described in detail above, but they are only 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 made to the present invention are also within the scope of the present invention. Therefore, the equalization changes and modifications made without departing from the spirit and scope of the present invention should be included in the scope of the present invention.

Claims

1. A gear-adjustable hammer impact tester, characterized in that: The invention comprises a base (100), a box (200), a power speed regulating mechanism (300), a reciprocating knocking mechanism (400) and a driving motor (700); wherein the box (200) is arranged at the right end of the top of the base (100), and the power speed regulating mechanism (300) and the reciprocating knocking mechanism (400) are arranged in the left and right cavities thereof respectively; 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; The reciprocating knocking mechanism (400) is composed of a bottom plate slide (410), a supporting slide (420), a triangular transmission block (430) and a limiting frame (440); the supporting 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 limiting frame (440) on the back side, and the left end of the limiting frame (440) is detachably connected to the one-piece hammer (900) to be tested; the triangular transmission block (430) is movably arranged in the limiting frame (440), the central axis (431) thereon is connected to the manual gear speed regulator (320), and the swing axis (432) on the back side is embedded in the limiting groove (425) at the left end of the upper vertical plate (422).

2. The gear-adjustable hammer impact testing machine 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, and a motor mounting plate (102) for mounting a driving motor (700) is provided at the bottom of the notch (101).

3. The gear-adjustable hammer impact testing machine according to claim 1, characterized in that: The inner cavity of the box body (200) is divided into a first bin body (202) and a second bin body (203) arranged on the left and right by a partition (201); wherein: The power speed regulating mechanism (300) and the driving motor (700) are installed in the first bin body (202); the front end of the second bin body (203) is open, and the reciprocating knocking mechanism (400) is installed therein.

4. The gear-adjustable hammer impact testing machine according to claim 1, 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 drivingly connected to the output shaft of the drive motor (700), and the other end is drivingly connected to 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 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.

5. The gear-adjustable hammer impact testing machine according to claim 4, 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).

6. The gear-adjustable hammer impact testing machine according to claim 4, characterized in that: The support slide (420) comprises 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 axial hole (423) is opened at the lower right corner of the upper vertical plate (422) corresponding to the position of the side support seat (424), and a vertically arranged limiting groove (425) is opened at the left end.

7. The gear-adjustable hammer impact testing machine according to claim 1, characterized in that: The limit 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 limit bolt (444) and a locking nut (445).

8. The gear-adjustable hammer impact testing machine according to claim 7, characterized in that: An inverted U-shaped bracket (446) is arranged at the top of the front end of the C-shaped bracket (442), a limit column (447) is movably arranged 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 limit column (447).

9. The gear-adjustable hammer impact testing machine according to claim 1, characterized in that: It also includes a knock test table (500) and a tool storage box (600) installed at the top left end of the base (100), wherein: A knocking gasket (501) is arranged on the top of the knocking test bench (500), and the lower ends of the second buffer springs (502) at the four corners of the bottom are respectively embedded in the grooves on the top of the base (100); The tool storage box (600) is fixedly mounted on the top left end surface of the base (100) and is located at the rear side of the knock test table (500).

10. The gear-adjustable hammer impact testing machine according to claim 1, characterized in that: It also includes a controller (800) disposed on the front side wall of the box (200), wherein: The controller (800) is a PLC controller and is electrically connected to the drive motor (700) and the rotation speed sensor (334) respectively.

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