A rockwell hardness tester

Abstract

The utility model relates to a Rockwell hardness tester, through the fixed pillar of symmetrical arrangement at the both sides of the pendant column, form the stable structure of triangular support, the pendant column and the fixed pillar one end stable connection shell, the other end reliable connection top cover, this design can effectively disperse and bear the various forces that loading depth mechanism produced in the working process, reduce the vibration and deformation of equipment, the shell side wall sets up the opening groove to install the base, and the loading depth mechanism is set up at the one end of the base extension shell, this kind of layout utilizes the space inside and outside the shell, has guaranteed that the loading depth mechanism has enough operating space, and the face frame subassembly is set up at the shell one side, has provided the intuitive, convenient operation interface for operating personnel.

Description

Technical Field

[0001] This utility model relates to the field of Rockwell hardness tester technology, and in particular to a Rockwell hardness tester. Background Technology

[0002] Traditional Rockwell hardness testers typically consist of a frame, loading system, indenter, test stand, and depth measurement mechanism. However, in practical applications, some existing Rockwell hardness tester structures still suffer from insufficient overall structural rigidity, potentially leading to micro-deformation during long-term use or frequent loading, affecting measurement stability and accuracy. Furthermore, the guiding accuracy and driving smoothness of the loading mechanism need improvement, which may result in deviations in the applied test force or unstable indentation. Additionally, the indenter and surrounding sensing components lack adequate and effective protection, making them susceptible to external impacts, dust contamination, or light interference, thus affecting the accuracy of sensor signals and potentially shortening component lifespan. Moreover, many devices have relatively limited functionality, lacking modern auxiliary positioning, observation and recording, or lighting systems, making it inconvenient for operators to align the sample, observe the indentation position, and record the testing process, thus impacting testing efficiency and user experience. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a Rockwell hardness tester that is structurally stable, accurate in measurement, easy to operate, and has comprehensive protection and multiple auxiliary functions.

[0004] To achieve the above objectives, this utility model employs a Rockwell hardness tester comprising a housing, an opening groove on the side wall of the housing, a base fixedly installed within the opening groove, a loading depth measuring mechanism at one end of the base extending from the housing, a top cover mounted on the housing on the loading depth measuring mechanism, a hanging column at the end of the base away from the loading depth measuring mechanism, and fixed supports symmetrically arranged on both sides of the hanging column, one end of each hanging column and fixed support being connected inside the housing, and the other end connected to the top cover, a face frame assembly on one side of the housing, and a test platform corresponding to the loading depth measuring mechanism inside the housing.

[0005] The beneficial effects of the above structure are as follows: By symmetrically setting fixed supports on both sides of the hanging column, a stable triangular support structure is formed. One end of the hanging column and the fixed support is firmly connected to the shell, and the other end is reliably connected to the top cover. This design can effectively distribute and bear the various forces generated by the loading depth sounding mechanism during operation, reducing the vibration and deformation of the equipment. The side wall of the shell has an opening slot for installing the base, and the loading depth sounding mechanism is set at the end of the base that extends out of the shell. This layout utilizes the space inside and outside the shell, ensuring that the loading depth sounding mechanism has sufficient operating space. The face frame assembly is set on one side of the shell, providing the operator with an intuitive and convenient operating interface.

[0006] This utility model is further configured as a loading depth measuring mechanism including a sliding seat on a base and a top seat on the sliding seat. A screw is connected through the sliding seat and the top seat. A synchronous pulley is installed at the top end of the screw. The end of the screw is located on the base and has a gap between it and the upper surface of the base. The top seat and the sliding seat are provided with coaxially connected outer guide posts on both sides of the screw. A drive assembly is installed on the top seat at one end near the sliding seat. A pressure head connecting block is provided at the lower end of the base. A left guide post and a right guide post are arranged parallel between the sliding seat and the base between the outer guide posts. One end of the left guide post and the right guide post are connected to the sliding seat, and the other end is connected to the pressure head connecting block through a guide post groove opened in the base. A pressure head assembly is installed on the pressure head connecting block. The sliding seat and the top seat are connected by a screw, and a synchronous pulley is installed at the top. This allows the screw to achieve precise rotation when the drive assembly drives the synchronous pulley to rotate. The multi-guide post structure provides all-round and stable guidance for all components of the loading depth sounding mechanism. A gap is left between the end of the screw and the upper surface of the base. This design ensures the normal rotation of the screw while avoiding direct friction and interference between the screw and the base.

[0007] This utility model is further configured such that the pressure head assembly includes a pressure sensor connecting block mounted on a pressure head connecting block, a lamp holder is provided at the lower end of the pressure sensor connecting block, a pressure sensor is installed between the lamp holder and the pressure sensor connecting block, a pressure head protective sleeve is fitted on the outer wall of the pressure sensor and the pressure sensor connecting block, a pressure head protective sleeve flange is installed on the pressure head protective sleeve, the pressure head protective sleeve flange is located in the installation gap between the pressure head connecting block and the pressure sensor connecting block, a pressure head seat is inserted into the lamp holder, the pressure sensor is connected to the pressure head seat screw through a slot opened in the lamp holder, a pressure head sleeve is inserted into the pressure head seat, a compression spring is provided in the pressure head sleeve, one end of the compression spring abuts against the upper end surface of the pressure head sleeve, and the other end is wound around the screw, a pressure head is inserted into the pressure head sleeve, a first pressure head protective sleeve is fitted on the outer wall of the pressure head seat, a second pressure head protective sleeve is fitted on the outer wall of the pressure head sleeve, a third pressure head protective sleeve is fitted on the outer wall of the pressure head, and a protective cover connected to the lamp holder is installed on the lamp holder corresponding to the first pressure head protective sleeve on the pressure head seat. By installing a pressure sensor between the pressure sensor connecting block and the lamp holder, the pressure on the indenter during loading can be directly and accurately sensed. The indenter protective sleeve effectively prevents damage to the indenter from collisions, scratches, etc. during measurement. At the same time, the indenter protective seat and flange provide additional protection for the pressure sensor, avoiding interference and damage from external factors. The compression spring inside the indenter sleeve can buffer and dampen shocks when the indenter contacts the sample and applies pressure. The protective cover installed on the lamp holder and connected to the lamp holder corresponds to the first indenter protective sleeve on the indenter seat, providing comprehensive protection for the entire indenter assembly. A test stand is provided inside the housing corresponding to the indenter, so that the indenter assembly can fit well with the test stand to adapt to the testing needs of samples of different shapes and sizes.

[0008] This utility model further features a top cover plate connected to the top cover on the housing. A protective sleeve bracket is installed inside the base. The top cover plate has a slot, and a protective sleeve fixing plate is installed in the slot. A protective sleeve flange is provided at the lower end of the protective sleeve fixing plate. The protective sleeve bracket is connected to the protective sleeve flange through the protective sleeve fixing plate. A protective sleeve is provided between the protective sleeve flange and the pressure head protective sleeve flange. The connection between the top cover plate and the top cover provides an additional protective layer for the entire top of the equipment. The protective sleeve, placed between the protective sleeve flange and the pressure head protective sleeve flange, forms an effective protective barrier, preventing external dust, impurities, metal debris, etc., from entering the pressure head assembly.

[0009] This invention further comprises a protective cover for the lamp holder, within which are respectively provided camera brackets and laser brackets located on both sides of the pressure head base. The camera brackets and laser brackets are connected to the lamp holder. A global camera is mounted on the camera bracket, and a laser emitter for auxiliary positioning is mounted on the laser bracket. A lamp groove is also formed on one side of the lamp holder, within which is an LED lamp holder connected to the lamp holder. The LED lamp holder extends outward through the lamp groove and is equipped with an LED light. The laser emitter, mounted on the laser bracket, allows for precise positioning of the relative position of the pressure head and the sample using a laser beam. The global camera, mounted on the camera bracket, enables real-time and comprehensive imaging of the contact process between the pressure head and the sample, as well as the surface condition of the sample. The lamp groove on one side of the lamp holder, with its LED light extending outward through the groove, provides sufficient and uniform illumination to the measurement area.

[0010] This invention further features a sensor harness between the left guide post and the screw. One end of the sensor harness is connected to the sliding seat, and the other end extends through a harness groove in the base to the pressure head connecting block, with a gap between the harness and the upper surface of the pressure head connecting block. A grating ruler positioning seat, penetrating the base, is provided between the right guide post and the screw. A grating head positioning frame is mounted on the bottom wall of the base, and a grating sensor is mounted on the grating head positioning frame. A grating ruler, mounted on the grating ruler positioning seat, is located between the grating head positioning frame and the grating ruler positioning seat. This arrangement of the sensor harness between the left guide post and the screw utilizes the internal space of the device, providing the harness with an independent routing channel and avoiding interference with other moving parts or signal lines. The gap between the sensor harness and the upper surface of the pressure head connecting block accommodates minor vibrations and displacements of the harness during device operation. The sensor connected to the harness can measure the pressure on the pressure head during loading in real time. The grating ruler and grating sensor work together to accurately measure the displacement of the pressure head assembly during loading.

[0011] This utility model further comprises a drive assembly including a motor support frame mounted on the top seat near the sliding seat. A motor mounting base is installed on the motor support frame. A small pulley is mounted on the motor mounting base near the synchronous pulley, and a stepper motor is mounted on the other end. The shaft of the stepper motor is connected to the small pulley through a shaft hole in the motor mounting base. A synchronous belt is wound between the synchronous pulley and the small pulley. By winding a synchronous belt between the synchronous pulley and the small pulley, the synchronous belt drive has an accurate transmission ratio, ensuring that the rotational motion output by the stepper motor is precisely transmitted to the synchronous pulley.

[0012] This invention further comprises limit switch seats on both sides of the top seat and the base, each equipped with a micro switch. The sliding seat has lower and upper limit plates corresponding to the micro switches on the base and top seat, respectively. By setting the upper limit micro switch and upper limit plate, the upward position of the sliding seat can be precisely controlled, ensuring that the pressure head is at the same starting height before each measurement, thereby improving the repeatability and accuracy of the measurement results. The lower limit micro switch and lower limit plate ensure that the sliding seat can accurately stop at the set position when moving the loading pressure head downwards, avoiding measurement errors caused by inaccurate loading positions.

[0013] This invention is further configured such that the top base has a connecting top cover fixing post corresponding to the top cover, and the base has a snap-fit ​​open linear bearing corresponding to the left and right guide posts. The top cover fixing post provides a precise positioning reference for the installation of the top cover, and the open linear bearing is used to ensure that the left and right guide posts are well guided and supported during movement, reducing friction and wear.

[0014] This invention is further configured with a leveling foot installed at the bottom of the housing. The leveling foot installed at the bottom of the housing allows for adjustment of the equipment's level. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the assembly of the base and the loading depth measuring mechanism inside the housing of this utility model embodiment.

[0017] Figure 3 This is a schematic diagram of the loading depth sounding mechanism according to an embodiment of the present invention.

[0018] Figure 4 This is an exploded view of the pressure head assembly installation according to an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the protective sleeve structure on the pressure head assembly according to an embodiment of this utility model.

[0020] Figure 6 This is a front view of the loading depth measuring mechanism without the pressure head assembly according to an embodiment of the present invention.

[0021] Figure 7 This is a schematic diagram of the drive component assembly according to an embodiment of the present invention. Detailed Implementation

[0022] like Figures 1-7As shown, an embodiment of this utility model provides a Rockwell hardness tester, including a housing 1. An opening groove 11 is provided on the side wall of the housing 1. A base 2 is fixedly installed in the opening groove 11. A loading depth measuring mechanism 3 is provided at one end of the base 2 extending from the housing 1. A top cover 4 is provided on the loading depth measuring mechanism 3 and mounted on the housing 1. A hanging column 21 is provided at the end of the base 2 away from the loading depth measuring mechanism 3. Fixed support columns 22 are symmetrically arranged on both sides of the hanging column 21. One end of the hanging column 21 and the fixed support column 22 are connected to the housing 1, and the other end is connected to the top cover 4. A face frame assembly 12 is provided on one side of the housing 1. A test platform 13 is also provided in the housing 1 corresponding to the loading depth measuring mechanism 3. In addition, a top cover plate 41 connected to the top cover 4 is provided on the housing 1. A start button 14, an emergency stop switch 15, and a rocker arm 16 are provided at the front end of the housing 1 and are all inserted into the housing 1. A horizontal foot 17 is installed at the bottom end of the housing 1.

[0023] The loading depth sounding mechanism 3 is mounted on the base 2 and consists of a sliding seat 31 and a top seat 32. A screw 33 is connected between the sliding seat 31 and the top seat 32. A synchronous pulley 331 is installed at the top of the screw 33, and the end is located on the base 2 with a gap between it and the upper surface of the base 2. The top seat 32 and the sliding seat 31 are provided with coaxially connected outer guide posts 34 on both sides of the screw 33. A drive assembly 6 is installed at the end of the top seat 32 near the sliding seat 31. A pressure head connecting block 23 is provided at the lower end of the base 2. A left guide post 24 and a right guide post 25 are arranged parallel between the sliding seat 31 and the base 2 between the outer guide posts 34. One end of the guide post 25 is connected to the sliding seat 31, and the other end is connected to the pressure head connecting block 23 through the guide post groove opened in the base 2. A pressure head assembly 5 is installed on the pressure head connecting block 23. The base 2 is provided with a snap-fit ​​open linear bearing 10 corresponding to the left guide post 24 and the right guide post 25.

[0024] The pressure head assembly 5 includes a pressure sensor connecting block 51 mounted on the pressure head connecting block 23. A lamp holder 52 is located at the lower end of the pressure sensor connecting block 51. A pressure sensor 53 is installed between the lamp holder 52 and the pressure sensor connecting block 51. A pressure head protective sleeve 54 is fitted onto the outer wall of the pressure sensor 53 and the pressure sensor connecting block 51. A pressure head protective sleeve flange 541 is installed on the pressure head protective sleeve 54, located in the installation gap between the pressure head connecting block 23 and the pressure sensor connecting block 51. A pressure head seat 55 is inserted into the lamp holder 52. The pressure sensor 53 is connected to the pressure head seat 55 via a slot in the lamp holder 52 using screws. The screw 50 is connected to the pressure head seat 55, and a pressure head sleeve 56 is inserted inside the pressure head seat 55. A compression spring 562 is provided inside the pressure head sleeve 56. One end of the compression spring 562 abuts against the upper end surface of the pressure head sleeve 56, and the other end is wound around the screw 50. A pressure head 57 is inserted inside the pressure head sleeve 56. A first pressure head protective sleeve 551 is fitted on the outer wall of the pressure head seat 55, a second pressure head protective sleeve 561 is fitted on the outer wall of the pressure head sleeve 56, and a third pressure head protective sleeve 571 is fitted on the outer wall of the pressure head 57. A protective cover 521 connected to the lamp holder 52 is installed on the lamp holder 52 corresponding to the first pressure head protective sleeve 551 on the pressure head seat 55. A test platform seat 13 is also provided inside the housing 1 corresponding to the pressure head 57.

[0025] A protective sleeve bracket 26 is installed inside the base 2. The top cover plate 41 has a slot, and a protective sleeve fixing plate 27 is installed in the slot. A protective sleeve flange 28 is provided at the lower end of the protective sleeve fixing plate 27. The protective sleeve bracket 26 is connected to the protective sleeve flange 28 through the protective sleeve fixing plate 27. A protective sleeve 29 is provided between the protective sleeve flange 28 and the pressure head protective sleeve flange 541. Inside the protective cover 521 of the lamp holder 52, there are also camera brackets 58 and laser brackets 59 located on both sides of the pressure head seat 55. The camera brackets 58 and laser brackets 59 are connected to the lamp holder 52. A global camera 581 is installed on the camera bracket 58, and a laser emitter 591 for auxiliary positioning is installed on the laser bracket 59. A lamp groove is also provided on one side of the lamp holder 52. An LED lamp holder 7 connected to the lamp holder 52 is provided in the lamp groove. The LED lamp holder 7 extends outward through the lamp groove and is equipped with an LED lamp 71.

[0026] A sensor harness 8 is provided between the left guide post 24 and the screw 33. One end of the sensor harness 8 is connected to the sliding seat 31, and the other end extends to the pressure head connecting block 23 through the harness groove opened in the base 2, with a gap between it and the upper end face of the pressure head connecting block 23. A grating ruler positioning seat 251 is provided between the right guide post 25 and the screw 33, which is connected to the base 2. A grating head positioning frame 252 is installed on the bottom wall of the base 2. A grating sensor 253 is installed on the grating head positioning frame 252. A grating ruler is installed on the grating ruler positioning seat 251 between the grating head positioning frame 252 and the grating ruler positioning seat 251.

[0027] The drive assembly 6 includes a motor support frame 61 mounted on the top seat 32 near the sliding seat 31. A motor mounting base 62 is mounted on the motor support frame 61. A small pulley 63 is mounted on the motor mounting base 62 near the synchronous pulley 331, and a stepper motor 64 is mounted on the other end. The shaft end of the stepper motor 64 is connected to the small pulley 63 through a shaft hole opened on the motor mounting base 62. A synchronous belt 65 is wound between the synchronous pulley 331 and the small pulley 63.

[0028] Limit switch seats 9 are provided on both sides of the top seat 32 and the base 2. Micro switches 91 are installed on the limit switch seats 9. The sliding seat 31 is provided with a lower limit piece 311 and an upper limit piece 312 on both sides corresponding to the micro switches 91 on the base 2 and the top seat 32, respectively. The top seat 32 is also provided with a top cover fixing post 42 connected to the top cover 4.

[0029] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A Rockwell hardness tester, characterized in that: The device includes a housing with an opening slot on its side wall. A base is fixedly installed in the opening slot. A loading depth measuring mechanism is provided at one end of the base extending from the housing. A top cover is installed on the loading depth measuring mechanism and mounted on the housing. A hanging column is provided at the end of the base away from the loading depth measuring mechanism. Fixed support columns are symmetrically arranged on both sides of the hanging column. One end of the hanging column and the fixed support columns are connected to the housing, and the other end is connected to the top cover. A face frame assembly is provided on one side of the housing. A test platform is also provided inside the housing corresponding to the loading depth measuring mechanism.

2. The Rockwell hardness tester according to claim 1, characterized in that: The loading depth sounding mechanism includes a sliding seat mounted on a base and a top seat mounted on the sliding seat. A screw rod is connected through the sliding seat and the top seat. A synchronous pulley is installed at the top end of the screw rod, and the end of the screw rod is located on the base with a gap between it and the upper surface of the base. The top seat and the sliding seat are provided with coaxially connected outer guide posts on both sides of the screw rod. A drive assembly is installed on the top seat at the end near the sliding seat. A pressure head connecting block is provided at the lower end of the base. A left guide post and a right guide post are arranged parallel between the sliding seat and the base between the outer guide posts. One end of the left guide post and the right guide post are connected to the sliding seat, and the other end is connected to the pressure head connecting block through a guide post groove in the base. A pressure head assembly is installed on the pressure head connecting block.

3. The Rockwell hardness tester according to claim 2, characterized in that: The pressure head assembly includes a pressure sensor connecting block mounted on a pressure head connecting block. A lamp holder is located at the lower end of the pressure sensor connecting block. A pressure sensor is installed between the lamp holder and the pressure sensor connecting block. A pressure head protective sleeve is fitted onto the outer wall of the pressure sensor and the pressure sensor connecting block. A pressure head protective sleeve flange is installed on the pressure head protective sleeve, located in the installation gap between the pressure head connecting block and the pressure sensor connecting block. A pressure head seat is inserted into the lamp holder. The pressure sensor is connected to the pressure head seat via a screw through a slot in the lamp holder. A pressure head sleeve is inserted into the pressure head seat. A compression spring is installed inside the pressure head sleeve, with one end abutting against the upper surface of the pressure head sleeve and the other end wound around the screw. A pressure head is inserted into the pressure head sleeve. A first pressure head protective sleeve is fitted onto the outer wall of the pressure head seat, a second pressure head protective sleeve is fitted onto the outer wall of the pressure head sleeve, and a third pressure head protective sleeve is fitted onto the outer wall of the pressure head. A protective cover connected to the lamp holder is installed on the lamp holder corresponding to the first pressure head protective sleeve on the pressure head seat.

4. The Rockwell hardness tester according to claim 3, characterized in that: The housing is also provided with a top cover plate connected to the top cover. A protective sleeve bracket is installed in the base. The top cover plate has a slot. A protective sleeve fixing plate is provided in the slot. A protective sleeve flange is provided at the lower end of the protective sleeve fixing plate. The protective sleeve bracket is connected to the protective sleeve flange through the protective sleeve fixing plate. A protective sleeve is provided between the protective sleeve flange and the pressure head protective sleeve flange.

5. The Rockwell hardness tester according to claim 3, characterized in that: The protective cover of the lamp holder is also equipped with a camera bracket and a laser bracket located on both sides of the pressure head base. The camera bracket and the laser bracket are connected to the lamp holder. A global camera is installed on the camera bracket, and a laser emitter for auxiliary positioning is installed on the laser bracket. A lamp groove is also opened on one side of the lamp holder. An LED lamp holder connected to the lamp holder is installed in the lamp groove. The LED lamp holder extends outward through the lamp groove and is equipped with an LED light.

6. The Rockwell hardness tester according to claim 2, characterized in that: A sensor harness is provided between the left guide post and the screw. One end of the sensor harness is connected to the sliding seat, and the other end extends to the pressure head connecting block through the harness groove opened in the base, with a gap between it and the upper end face of the pressure head connecting block. A grating ruler positioning seat is provided between the right guide post and the screw, which is connected to the base. A grating head positioning frame is installed on the bottom wall of the base. A grating sensor is installed on the grating head positioning frame. A grating ruler is installed on the grating ruler positioning seat between the grating head positioning frame and the grating ruler positioning seat.

7. The Rockwell hardness tester according to claim 2, characterized in that: The drive assembly includes a motor support frame installed on the top seat near the sliding seat. A motor mounting base is installed on the motor support frame. A small pulley is installed on the motor mounting base near the synchronous pulley, and a stepper motor is installed on the other end. The shaft end of the stepper motor is connected to the small pulley through a shaft hole opened on the motor mounting base. A synchronous belt is wound between the synchronous pulley and the small pulley.

8. The Rockwell hardness tester according to claim 2, characterized in that: Limit switch seats are provided on both sides of the top seat and the base, and micro switches are installed on the limit switch seats. The sliding seat has a lower limit plate and an upper limit plate on both sides corresponding to the micro switches on the base and the top seat, respectively.

9. The Rockwell hardness tester according to claim 2, characterized in that: The top seat is provided with a top cover fixing post corresponding to the top cover, and the base is provided with an open linear bearing corresponding to the left guide post and the right guide post.

10. The Rockwell hardness tester according to claim 1, characterized in that: The bottom of the housing is equipped with a horizontal foot.

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