A desktop durometer that encompasses a variety of rubber hardness test methods

Abstract

This invention relates to the technical field of benchtop hardness testers, and more particularly to a benchtop hardness tester encompassing multiple rubber hardness testing methods. The tester includes a frame assembly, a material lifting assembly, a probe drive assembly, a guide and limiting assembly, a modular probe mounting assembly, and a safety locking assembly. The frame assembly includes a base plate and a guide rail mounting base fixed to the base plate. The material lifting assembly includes a material platform, which is vertically and flexibly mounted on the guide rail mounting base. This benchtop hardness tester, encompassing multiple rubber hardness testing methods, achieves compatibility with various rubber hardness testing methods such as Shore, IRHD, and capsule impingement through a modular probe mounting structure and integrated design. This eliminates the need to purchase multiple single-function instruments, significantly reducing user procurement and maintenance costs, saving laboratory space, and avoiding testing errors caused by repeated sample clamping across different devices, thus improving the consistency and accuracy of test results.

Description

Technical Field

[0001] This invention relates to the technical field of benchtop hardness testers, and in particular to a benchtop hardness tester that covers a variety of rubber hardness testing methods. Background Technology

[0002] Rubber hardness is one of the core indicators characterizing the mechanical properties of rubber materials. It is widely used in quality control and new material research and development of rubber products such as tires, seals, hoses, and shock absorbers. Currently, the mainstream rubber hardness testing methods in the industry include Shore hardness (Shore A, D, AO, etc.), International Rubber Hardness (IRHD, including the IRHD-M micro method and the conventional IRHD method), and capsule hardness testing for special soft / foam samples. Different testing methods correspond to different probe structures, loading force specifications, and displacement detection logic, and need to be adapted to rubber samples with specific hardness ranges and shapes.

[0003] Traditional benchtop rubber hardness testers typically feature a single, fixed probe structure, compatible with only 1-2 testing methods. Companies must purchase multiple units to cover the full range of testing needs, significantly increasing procurement and maintenance costs, consuming substantial laboratory space, and introducing human error due to repeated sample clamping between different devices, reducing the consistency and accuracy of test results. Existing hardness testers attempting to use replaceable probes still suffer from numerous technical shortcomings. Probe replacement requires disassembling multiple sets of fasteners, a cumbersome and time-consuming operation. The lack of a precise guiding and positioning structure makes it difficult to guarantee coaxiality and perpendicularity after probe replacement. Furthermore, the low modularity of the equipment, high coupling between the probe and drive mechanism, and inconvenient maintenance and upgrades, coupled with insufficient precision in the manual lifting mechanism and an unreasonable design of the probe lifting safety locking mechanism, easily lead to locking misalignment or loosening of the drive reference. These systems fail to simultaneously achieve multi-scale compatibility, rapid probe replacement, testing accuracy, and ease of operation, making it difficult to meet the modern rubber industry's demand for efficient and accurate hardness testing. Summary of the Invention

[0004] The purpose of this invention is to provide a benchtop hardness tester that covers a variety of rubber hardness testing methods, in order to solve the problem mentioned in the background art that traditional benchtop rubber hardness testers mostly have a single probe curing structure and can only be adapted to a small number of testing methods.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a benchtop hardness tester covering multiple rubber hardness testing methods, comprising a frame assembly, a material lifting assembly, a probe driving assembly, a guide and limiting assembly, a modular probe mounting assembly, and a safety locking assembly, wherein the frame assembly includes a base plate and a guide rail mounting base fixed to the base plate;

[0006] The material lifting assembly includes a material platform, which is vertically and flexibly mounted on a guide rail mounting base;

[0007] The probe drive assembly includes a small motor, a lead screw, a motor mounting plate, and a probe lifting plate. The motor mounting plate is fixedly mounted on the guide post. The small motor is mounted on the motor mounting plate and driven by the lead screw. The probe lifting plate cooperates with the lead screw and slides along the axial direction of the guide post to achieve lifting.

[0008] The guide and limiting assembly includes a guide post, a linear guide rail, a slider, a limiting block, a proximity switch, and a probe limiting plate. The guide post and the linear guide rail are fixed to the guide rail mounting base. The slider slides with the linear guide rail and is fixedly connected to the probe lifting plate. The probe lifting plate is sleeved on the guide post. The limiting block, the proximity switch, and the probe limiting plate cooperate to limit the stroke of the probe lifting plate.

[0009] The modular probe mounting assembly includes a docking mounting block and a probe fastening stud. The front end of the probe lifting plate has a positioning slot, the docking mounting block is inserted into the positioning slot, and the side of the docking mounting block has a threaded hole. The probe fastening stud passes through the side wall of the probe lifting plate and is threaded to the docking mounting block to achieve locking. Various rubber hardness testing probes can be detachably installed at the lower end of the docking mounting block.

[0010] The safety locking assembly includes a safety adjustable handle, which is installed on the side of the motor mounting plate. By driving the locking component to abut against the probe lifting plate, the probe lifting plate can be manually locked or unlocked.

[0011] Preferably, the material lifting assembly further includes a lifting block, a nut, a threaded rod, a handwheel, a bearing sleeve, a connecting bearing, and a bearing retaining ring. The threaded rod is mounted on the guide rail mounting base via the connecting bearing and the bearing sleeve. The handwheel is connected to the threaded rod to drive its rotation. The nut is sleeved on the threaded rod and fixed to the lifting block. The lifting block is fixed to the material platform to drive the material platform to lift. The bearing retaining ring is used to limit the connection bearing.

[0012] Preferably, the probe drive assembly further includes a connecting cover, a motor cover, and a fastening gasket. The output end of the small motor is connected to the lead screw drive. The connecting cover is rotatably engaged with the lead screw. The motor cover is placed on the outside of the small motor. The fastening gasket is sleeved between the lead screw and the motor mounting plate.

[0013] Preferably, the guide limiting assembly further includes a locking retaining ring, a guide shaft, a linear bearing, and a key. The locking retaining ring is sleeved on the guide post and cooperates with the limiting block to form a bidirectional stroke limiting. The guide shaft cooperates with the linear bearing to provide auxiliary guidance for the probe lifting plate. The key is embedded between the limiting block and the guide post to fix the limiting block circumferentially on the guide post and prevent the limiting block from rotating.

[0014] Preferably, the guide limiting component further includes a pad, which is disposed between the slider and the probe lifting plate, and is used to adjust the levelness of the probe lifting plate or as a transition connecting pad.

[0015] Preferably, the probe drive assembly further includes a dust cover, which is positioned over the upper end of the guide shaft and corresponds to the outer side of the motor mounting plate. The dust cover is used to seal the mating part between the guide shaft and the linear bearing to prevent dust from entering.

[0016] Preferably, the docking mounting block has a cuboid structure, and its sidewall is in clearance fit with the positioning slot of the probe lifting plate, and the probe fastening stud is a hand-tight stud.

[0017] Preferably, the safety locking assembly further includes a locking block, a washer, a locking screw, and a handle mounting plate; the safety adjustable handle is fixedly connected to the motor mounting plate via the handle mounting plate; the locking screw is threadedly connected to the motor mounting plate, with one end linked to the safety adjustable handle and the other end rotatably connected to the locking block; the locking block, driven by the locking screw, can move in a direction perpendicular to the sliding direction of the probe lifting plate, abutting against or disengaging from the side of the probe lifting plate, thereby locking or unlocking the probe lifting plate.

[0018] Preferably, the proximity switch is fixed to the probe lifting plate and is used to detect the extreme position of the probe lifting plate and output a control signal.

[0019] Preferably, the probe limiting plate is fixed to the probe lifting plate and is used to cooperate with the proximity switch to limit the probe travel.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. Through modular integrated design, a single device can be compatible with a full range of rubber hardness testing methods such as Shore, IRHD, and capsule type, completely changing the traditional situation where multiple devices need to be purchased. This significantly reduces users' procurement and maintenance costs, saves laboratory space, and avoids human error caused by repeated clamping of samples between multiple devices, thus significantly improving the consistency and accuracy of hardness test results.

[0022] 2. The quick-installation structure, which uses a mating mounting block with positioning slots and side studs for locking, allows for rapid disassembly and replacement of different test probes without complicated disassembly operations. The positioning and fitting structure can stably ensure the coaxiality and perpendicularity of the probes, balancing probe replacement efficiency and test repeatability. The equipment has a high degree of modularity, and subsequent probe upgrades and equipment maintenance do not require disassembling the main unit's core components, making operation simple and efficient.

[0023] 3. The equipment adopts a dual-mode structure of manual material platform lifting and motor-driven probe lifting, which balances the flexibility of manual adjustment and the precision of electric drive. With the help of linear guide rails and guide columns, the probe lifting is guaranteed to be smooth and stable. The safety locking mechanism uses fixed parts as the reference and locks the probe lifting plate by abutment. The locking is reliable and does not affect the stability of the drive reference. With the addition of double limit and dust protection design, the safety, stability and service life of the equipment are further improved. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the overall side cross-sectional structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the docking and mounting block structure of the present invention.

[0028] In the diagram: 1. Material platform; 2. Lifting support block; 3. Nut; 4. Threaded rod; 5. Handwheel; 6. Base plate; 7. Bearing sleeve; 8. Connecting bearing; 9. Bearing retaining ring; 10. Guide rail mounting base; 11. Locking retaining ring; 12. Guide post; 13. Limit block; 14. Linear guide rail; 15. Slider; 16. Pad; 17. Probe lifting plate; 18. Proximity switch; 19. Guide shaft; 20. Linear bearing; 21. Motor mounting plate; 22. Dust cover; 23. Key; 24. Connecting cover; 25. Lead screw; 26. Motor cover; 27. Small motor; 28. Fastening gasket; 29. ​​Probe limiting plate; 30. Probe fastening stud; 31. Locking pressure block; 32. Washer; 33. Locking screw; 34. Handle mounting plate; 35. Safety adjustable handle; 36. Docking mounting block. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1-4The present invention provides a technical solution: a benchtop hardness tester covering multiple rubber hardness testing methods, including a frame assembly, a material lifting assembly, a probe driving assembly, a guide limiting assembly, a modular probe mounting assembly and a safety locking assembly. The frame assembly includes a base plate 6 and a guide rail mounting seat 10 fixed on the base plate 6.

[0031] The material lifting assembly includes a material platform 1, which is vertically mounted on a guide rail mounting base 10.

[0032] The probe drive assembly includes a small motor 27, a lead screw 25, a motor mounting plate 21, and a probe lifting plate 17. The motor mounting plate 21 is fixedly mounted on the guide post 12. The small motor 27 is mounted on the motor mounting plate 21 and driven by the lead screw 25. The probe lifting plate 17 cooperates with the lead screw 25 and slides along the axial direction of the guide post 12 to achieve lifting.

[0033] The guide and limit assembly includes a guide post 12, a linear guide rail 14, a slider 15, a limit block 13, a proximity switch 18, and a probe limit plate 29. The guide post 12 and the linear guide rail 14 are fixed to the guide rail mounting base 10. The slider 15 is slidably engaged with the linear guide rail 14 and fixedly connected to the probe lifting plate 17. The probe lifting plate 17 is sleeved on the guide post 12. The limit block 13, the proximity switch 18, and the probe limit plate 29 cooperate to limit the stroke of the probe lifting plate 17.

[0034] The modular probe mounting assembly includes a docking mounting block 36 and a probe fastening stud 30. The front end of the probe lifting plate 17 has a positioning slot, the docking mounting block 36 is inserted into the positioning slot, and the side of the docking mounting block 36 has a threaded hole. The probe fastening stud 30 passes through the side wall of the probe lifting plate 17 and is threaded to the docking mounting block 36 to achieve locking. Various rubber hardness test probes can be detachably installed at the lower end of the docking mounting block 36.

[0035] The safety locking assembly includes a safety adjustable handle 35, which is installed on the side of the motor mounting plate 21. By driving the locking component to abut against the probe lifting plate 17, the probe lifting plate 17 can be manually locked or unlocked.

[0036] Furthermore, the material lifting assembly also includes a lifting block 2, a nut 3, a threaded rod 4, a handwheel 5, a bearing sleeve 7, a connecting bearing 8, and a bearing retaining ring 9. The threaded rod 4 is mounted on the guide rail mounting base 10 via the connecting bearing 8 and the bearing sleeve 7. The handwheel 5 is connected to the threaded rod 4 to drive its rotation. The nut 3 is sleeved on the threaded rod 4 and fixed to the lifting block 2. The lifting block 2 is fixed to the material platform 1 to drive the material platform 1 to rise and fall. The bearing retaining ring 9 is used to limit the connection bearing 8. In addition to the core material platform 1, the material lifting assembly is also equipped with a lifting block 2, a nut 3, a threaded rod 4, a handwheel 5, a bearing sleeve 7, a connecting bearing 8, and a bearing retaining ring 9. Wheel 5, bearing sleeve 7, connecting bearing 8 and bearing retaining ring 9, threaded rod 4 is stably assembled on guide rail mounting seat 10 with the help of connecting bearing 8 and bearing sleeve 7. Bearing retaining ring 9 axially limits the connecting bearing 8 to prevent the bearing from shifting during transmission. Turning handwheel 5 drives threaded rod 4 to rotate. Nut 3 sleeved on threaded rod 4 moves axially linearly with threaded rod 4 as threaded rod 4 rotates. In turn, lifting block 2 drives material platform 1 to rise and fall smoothly. The height of material platform 1 can be flexibly adjusted according to the thickness and size of rubber sample to meet the testing and clamping requirements of samples of different specifications.

[0037] Furthermore, the probe drive assembly also includes a connecting cover 24, a motor cover 26, and a fastening gasket 28. The output end of the small motor 27 is connected to the lead screw 25 for transmission. The connecting cover 24 and the lead screw 25 are rotatably engaged. The motor cover 26 covers the outside of the small motor 27. The fastening gasket 28 is sleeved between the lead screw 25 and the motor mounting plate 21. In addition to the small motor 27, lead screw 25, motor mounting plate 21, and probe lifting plate 17, the probe drive assembly also includes a connecting cover 24, a motor cover 26, and a fastening gasket 28. 8. The output end of the small motor 27 is stably connected to the lead screw 25 to provide a power source for the lifting and lowering of the probe. The connecting cover 24 rotates with the lead screw 25 to protect and guide the upper end of the lead screw 25. The motor cover 26 is placed on the outside of the small motor 27 to prevent dust and impurities from entering the motor and affecting the transmission accuracy. The fastening gasket 28 is sleeved between the lead screw 25 and the motor mounting plate 21 to effectively prevent the lead screw 25 from loosening during long-term transmission and to ensure the stability and accuracy of the lifting and lowering transmission of the probe lifting plate 17.

[0038] Furthermore, the guide limiting assembly also includes a locking retaining ring 11, a guide shaft 19, a linear bearing 20, and a key 23. The locking retaining ring 11 is sleeved on the guide post 12 and cooperates with the limiting block 13 to form a bidirectional stroke limit. The guide shaft 19 cooperates with the linear bearing 20 to provide auxiliary guidance for the probe lifting plate 17. The key 23 is embedded between the limiting block 13 and the guide post 12 to fix the limiting block 13 circumferentially on the guide post 12 and prevent the limiting block 13 from rotating. The guide limiting assembly also integrates the locking retaining ring 11, the guide shaft 19, the linear bearing 20, and the key on the basis of the core components. 23. The locking retaining ring 11 is fitted on the guide post 12 and cooperates with the limiting block 13 to form a bidirectional stroke limit for the probe lifting plate 17, preventing the lifting plate from overtravel and causing equipment damage. The guide shaft 19 and the linear bearing 20 cooperate with each other to provide auxiliary guidance during the lifting of the probe lifting plate 17, further improving the straightness and stability of the lifting motion. The key 23 is embedded between the mating surfaces of the limiting block 13 and the guide post 12 to fix the limiting block 13 circumferentially on the guide post 12, preventing the limiting block 13 from rotating or shifting during equipment operation and ensuring the accuracy of the stroke limit.

[0039] Furthermore, the guide limiting assembly also includes a pad 16, which is disposed between the slider 15 and the probe lifting plate 17. The pad 16 is used to adjust the level of the probe lifting plate 17 or as a transition connection shim. The guide limiting assembly also includes a pad 16, which is tightly assembled between the slider 15 and the probe lifting plate 17. As a transition connection structure between the two, the level and parallelism of the probe lifting plate 17 can be precisely adjusted according to assembly requirements. This compensates for the processing and assembly errors of the slider 15 and the probe lifting plate 17, ensuring that the probe lifting plate 17 and the linear guide rail 14 remain parallel. This avoids jamming or skew during the lifting process and provides structural protection for the accurate execution of hardness testing.

[0040] Furthermore, the probe drive assembly also includes a dust cover 22, which is installed on the upper end of the guide shaft 19 and corresponds to the outer side of the motor mounting plate 21. It is used to seal the mating part between the guide shaft 19 and the linear bearing 20 to prevent dust from entering. The probe drive assembly is also equipped with a dust cover 22, which is securely installed on the upper end of the guide shaft 19 and precisely corresponds to the outer side of the motor mounting plate 21. It completely seals the mating gap between the guide shaft 19 and the linear bearing 20, effectively preventing external dust, debris, and impurities from entering the guide pair, preventing jamming and wear in the guide part, ensuring long-term smooth operation between the guide shaft 19 and the linear bearing 20, extending the service life of the guide assembly, and maintaining the testing accuracy of the equipment.

[0041] Furthermore, the docking mounting block 36 has a cuboid structure, and its sidewall is in clearance fit with the positioning slot of the probe lifting plate 17. The probe fastening stud 30 is a hand-tight stud. The docking mounting block 36 in the modular probe mounting assembly adopts a regular cuboid structure. Its sidewall is in clearance fit with the positioning slot at the front end of the probe lifting plate 17. This ensures both smooth insertion of the mounting block and accurate positioning, ensuring that the coaxiality and perpendicularity of different probes meet the standards after installation. The probe fastening stud 30 adopts a hand-tight structure, which can be manually tightened without the aid of tools, quickly completing the locking and unlocking of the docking mounting block 36. This enables the rapid replacement of various rubber hardness testing probes, taking into account both the positioning accuracy and replacement efficiency of probe installation.

[0042] Furthermore, the safety locking assembly also includes a locking block 31, a washer 32, a locking screw 33, and a handle mounting plate 34. The safety adjustable handle 35 is fixedly connected to the motor mounting plate 21 via the handle mounting plate 34. The locking screw 33 is threadedly connected to the motor mounting plate 21, with one end linked to the safety adjustable handle 35 and the other end rotatably connected to the locking block 31. Driven by the locking screw 33, the locking block 31 can move in a direction perpendicular to the sliding direction of the probe lifting plate 17, abutting against or disengaging from the side of the probe lifting plate 17, thereby locking or unlocking the probe lifting plate 17. In addition to the safety adjustable handle 35, the safety locking assembly also includes a locking block 31, a washer 32, a locking screw 33, and a locking screw. The rod 33 and handle mounting plate 34, and the safety adjustable handle 35 are securely fixed to the side of the motor mounting plate 21 through the handle mounting plate 34, forming a stable locking operation reference. The locking screw 33 is threadedly engaged with the motor mounting plate 21. One end is linked to the safety adjustable handle 35 for transmission, and the other end is rotatably connected to the locking pressure block 31. Turning the safety adjustable handle 35 can drive the locking screw 33 to rotate, which in turn drives the locking pressure block 31 to move along the sliding direction perpendicular to the probe lifting plate 17, thereby abutting or disengaging from the side of the probe lifting plate 17. The locking or unlocking of the probe lifting plate 17 is achieved by relying on friction. The locking process does not affect the fixed state of the motor mounting plate 21. The operation is convenient and the locking is reliable.

[0043] Furthermore, the proximity switch 18 is fixed to the probe lifting plate 17 and is used to detect the extreme position of the probe lifting plate 17 and output a control signal. The proximity switch 18 is firmly installed on the probe lifting plate 17 and moves up and down synchronously with the probe lifting plate 17. It can detect the upper and lower extreme positions of the probe lifting plate 17 in real time, accurately collect position signals and output them to the equipment control system, provide data support for the automatic control of probe lifting, avoid the probe lifting plate 17 from overtravel, and realize the automatic safety protection of the equipment.

[0044] Furthermore, the probe limit plate 29 is fixed to the probe lifting plate 17 and is used to cooperate with the proximity switch 18 to realize the probe travel limit. The probe limit plate 29 is fixedly installed on the probe lifting plate 17 and moves synchronously with the lifting plate, forming a precise cooperation with the proximity switch 18. When the probe lifting plate 17 moves to the limit position, the probe limit plate 29 triggers the proximity switch 18 to act, which, together with the limit block 13 and the locking ring 11, forms a physical and electrical dual limit, which comprehensively limits the travel range of the probe lifting plate 17, further improving the safety of equipment operation and the stability of testing operations.

[0045] Working principle: First, place the rubber sample to be tested on the material platform 1. Turn the handwheel 5 to drive the threaded rod 4 to rotate. The threaded rod 4 rotates stably on the guide rail mounting seat 10 through the connecting bearing 8 and bearing sleeve 7. The nut 3 sleeved on the threaded rod 4 moves axially linearly accordingly. The lifting block 2 drives the material platform 1 to rise and fall smoothly, adjusting the sample to the appropriate testing height, thus completing the sample clamping and position adjustment. According to the required rubber hardness test type, install the corresponding test probe on the lower end of the docking mounting block 36. Insert the docking mounting block 36 into the positioning slot at the front end of the probe lifting plate 17, and tighten the probe fastening stud 30 so that it engages with the threaded hole on the side of the docking mounting block 36 to lock it in place. This completes the rapid positioning and fixing of the probe module, ensuring... The coaxiality and perpendicularity of the probe and the sample are checked. Before testing, the safety adjustable handle 35 is confirmed to be in the unlocked state. At this time, the locking block 31 is separated from the probe lifting plate 17, which does not affect the normal sliding of the probe lifting plate 17. After starting the equipment, the small motor 27 runs and drives the lead screw 25 to rotate through the transmission structure. Under the drive of the lead screw 25, the probe lifting plate 17 moves smoothly axially up and down along the guide post 12 and cooperates with the linear guide rail 14 and the slider 15. The pad 16 ensures the horizontal connection between the slider 15 and the probe lifting plate 17. The guide shaft 19 and the linear bearing 20 provide auxiliary guidance for the probe lifting plate 17 synchronously. The dust cover 22 prevents dust from entering the guide mating parts and ensures the smoothness of the lifting movement. During the lifting process of the probe lifting plate 17... In the test, the limiting block 13 and the locking retaining ring 11 form a physical bidirectional limiting mechanism. The proximity switch 18 and the probe limiting plate 29 monitor the lifting position in real time and output control signals to achieve electrical limit protection, preventing the probe lifting plate 17 from overtravel. The probe contacts and presses into the sample surface at a uniform speed with the probe lifting plate 17, completing loading, pressure holding, and displacement detection according to the corresponding hardness test standard to obtain accurate hardness data. If it is necessary to fix the probe position during the test, the safety adjustable handle 35 can be turned to rotate the locking screw 33, pushing the locking block 31 to move towards the side of the probe lifting plate 17 and tightly abut against it. The probe lifting plate 17 is temporarily locked by friction, ensuring the stability of the test process. To unlock, the safety adjustable handle 35 can be turned in the opposite direction. This allows the locking block 31 to disengage from the probe lifting plate 17, restoring the probe lifting plate 17 to its free sliding state. The entire locking and unlocking process does not affect the stability of the motor mounting plate 21 fixed on the guide post 12, and the transmission reference of the lead screw 25 remains unchanged. After the test is completed, the small motor 27 rotates in reverse, driving the lead screw 25 to reverse, so that the probe lifting plate 17 returns to its initial position along the guide post 12 and the linear guide rail 14. Loosening the probe fastening stud 30 allows the current probe to be quickly removed. After replacing with other types of probes, the above operation is repeated to continuously complete the testing of various rubber hardness testing methods. Through the coordinated cooperation of various components, the whole machine achieves modular quick head replacement, precision guiding lifting, and safe and reliable locking, forming an integrated and efficient hardness testing system.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A benchtop hardness tester encompassing multiple rubber hardness testing methods, comprising a frame assembly, a material lifting assembly, a probe drive assembly, a guide and limit assembly, a modular probe mounting assembly, and a safety locking assembly, characterized in that: The rack assembly includes a base plate (6) and a guide rail mounting base (10) fixed on the base plate (6). The material lifting assembly includes a material platform (1), which is vertically mounted on a guide rail mounting base (10); The probe drive assembly includes a small motor (27), a lead screw (25), a motor mounting plate (21), and a probe lifting plate (17). The motor mounting plate (21) is fixedly mounted on the guide post (12). The small motor (27) is mounted on the motor mounting plate (21) and driven by the lead screw (25). The probe lifting plate (17) cooperates with the lead screw (25) and slides along the axial direction of the guide post (12) to achieve lifting. The guide limiting assembly includes a guide post (12), a linear guide rail (14), a slider (15), a limiting block (13), a proximity switch (18), and a probe limiting plate (29). The guide post (12) and the linear guide rail (14) are fixed to the guide rail mounting base (10). The slider (15) slides with the linear guide rail (14) and is fixedly connected to the probe lifting plate (17). The probe lifting plate (17) is sleeved on the guide post (12). The limiting block (13), the proximity switch (18), and the probe limiting plate (29) cooperate to limit the stroke of the probe lifting plate (17). The modular probe mounting assembly includes a docking mounting block (36) and a probe fastening stud (30). The probe lifting plate (17) has a positioning slot at its front end. The docking mounting block (36) is inserted into the positioning slot, and the docking mounting block (36) has a threaded hole on its side. The probe fastening stud (30) passes through the side wall of the probe lifting plate (17) and is threaded to the docking mounting block (36) to achieve locking. The lower end of the docking mounting block (36) can be detachably installed with various rubber hardness test probes. The safety locking assembly includes a safety adjustable handle (35), which is installed on the side of the motor mounting plate (21). By driving the locking component to abut against the probe lifting plate (17), the probe lifting plate (17) can be manually locked or unlocked.

2. A benchtop hardness tester covering multiple rubber hardness testing methods according to claim 1, characterized in that: The material lifting assembly also includes a lifting block (2), a nut (3), a threaded rod (4), a handwheel (5), a bearing sleeve (7), a connecting bearing (8), and a bearing retaining ring (9). The threaded rod (4) is mounted on the guide rail mounting seat (10) through the connecting bearing (8) and the bearing sleeve (7). The handwheel (5) is connected to the threaded rod (4) to drive it to rotate. The nut (3) is sleeved on the threaded rod (4) and fixed to the lifting block (2). The lifting block (2) is fixed to the material platform (1) to drive the material platform (1) to rise and fall. The bearing retaining ring (9) is used to limit the connection bearing (8).

3. A benchtop hardness tester covering multiple rubber hardness testing methods according to claim 1, characterized in that: The probe drive assembly also includes a connecting cover (24), a motor cover (26), and a fastening gasket (28). The output end of the small motor (27) is connected to the lead screw (25) for transmission. The connecting cover (24) is rotatably engaged with the lead screw (25). The motor cover (26) covers the outside of the small motor (27). The fastening gasket (28) is sleeved between the lead screw (25) and the motor mounting plate (21).

4. A benchtop hardness tester covering multiple rubber hardness testing methods according to claim 1, characterized in that: The guide limiting assembly also includes a locking ring (11), a guide shaft (19), a linear bearing (20), and a key (23). The locking ring (11) is sleeved on the guide post (12) and cooperates with the limiting block (13) to form a bidirectional stroke limit. The guide shaft (19) cooperates with the linear bearing (20) to provide auxiliary guidance for the probe lifting plate (17). The key (23) is embedded between the limiting block (13) and the guide post (12) to fix the limiting block (13) circumferentially on the guide post (12) and prevent the limiting block (13) from rotating.

5. A benchtop hardness tester covering multiple rubber hardness testing methods according to claim 1, characterized in that: The guide limiting component also includes a pad (16), which is disposed between the slider (15) and the probe lifting plate (17) for adjusting the level of the probe lifting plate (17) or as a transition connecting pad.

6. A benchtop hardness tester covering multiple rubber hardness testing methods according to claim 1, characterized in that: The probe drive assembly also includes a dust cover (22), which covers the upper end of the guide shaft (19) and corresponds to the outer side of the motor mounting plate (21). It is used to seal the mating part between the guide shaft (19) and the linear bearing (20) to prevent dust from entering.

7. A benchtop hardness tester covering multiple rubber hardness testing methods according to claim 1, characterized in that: The docking mounting block (36) is a cuboid structure, and its side wall is in clearance fit with the positioning slot of the probe lifting plate (17). The probe fastening stud (30) is a hand-tight stud.

8. A benchtop hardness tester covering multiple rubber hardness testing methods according to claim 1, characterized in that: The safety locking assembly also includes a locking block (31), a washer (32), a locking screw (33), and a handle mounting plate (34). The safety adjustable handle (35) is fixedly connected to the motor mounting plate (21) through the handle mounting plate (34). The locking screw (33) is threadedly connected to the motor mounting plate (21), with one end linked to the safety adjustable handle (35) and the other end rotatably connected to the locking block (31). Under the drive of the locking screw (33), the locking block (31) can move in a direction perpendicular to the sliding direction of the probe lifting plate (17), abutting or disengaging from the side of the probe lifting plate (17), thereby locking or unlocking the probe lifting plate (17).

9. A benchtop hardness tester covering multiple rubber hardness testing methods according to claim 1, characterized in that: The proximity switch (18) is fixed to the probe lifting plate (17) and is used to detect the extreme position of the probe lifting plate (17) and output a control signal.

10. The benchtop hardness tester according to claim 1, characterized in that: The probe limiting plate (29) is fixed to the probe lifting plate (17) and is used to cooperate with the proximity switch (18) to realize the probe travel limit.

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