Linear bearing bearing and service life testing device

Abstract

The invention relates to a bearing and service life testing device for a linear bearing, which comprises a pair of substrates and a support rod which is arranged between the pair of substrates and can be sleeved by the linear bearing, the first detection part is used for driving the linear bearing to reciprocate along the supporting rod; the second detection part is used for continuously applying a radial tension load to the linear bearing when the linear bearing reciprocates; by simulating the daily working condition of the linear bearing and applying the radial tension load to the linear bearing, the limitation of the traditional test is broken through, the blank of dynamic radial load test standards is filled up, the test result is closer to the actual application scene, the engineering reference value of the test result is remarkably improved, the test process is automatically carried out, and the test efficiency is improved. The manpower is saved, and the testing efficiency is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of linear bearing detection, and in particular to a linear bearing load and life testing device. Background Art

[0002] Currently, linear bearings are mechanical components used to achieve linear motion. Through the cyclic motion of rolling elements, sliding friction is converted into rolling friction, significantly reducing motion resistance. Linear bearings are typically used in conjunction with optical or linear shafts and are widely used in applications requiring high-precision, low-friction linear motion. A linear bearing typically consists of an outer cylinder, rolling elements, and a cage. The outer cylinder is a cylindrical shell typically made of metal or engineering plastic. The rolling elements consist of multiple rows of balls or rollers, evenly distributed within a cage. The cage ensures that the rolling elements circulate during motion. As the linear bearing moves along the optical or linear shaft, the rolling elements within the outer cylinder roll between the shaft and the bearing, reducing contact area and frictional resistance. The rolling elements, guided by the cage, form a continuous circulation path within the bearing, enabling continuous rolling. Because rolling friction is much less than sliding friction, linear bearings can achieve linear motion with low resistance and high precision. Rolling friction ensures smoother shaft movement, making linear bearings suitable for high-speed or frequent start-stop applications.

[0003] Since most linear bearings operate in a state parallel to the ground, they mainly bear radial loads. Therefore, the degree of radial load they can withstand becomes an important indicator of linear bearing performance. However, for this indicator, most manufacturers estimate it based on the size of the linear bearings they produce and their experience, or directly install the linear bearings in actual use scenarios for rough testing.

[0004] There is currently no suitable equipment on the market to test this indicator. Most of the existing equipment is used to test the strength of the deep groove ball bearing itself. For example, in the Chinese patent application number CN202420197429.3, the application date is January 26, 2024, a deep groove ball bearing stress strength test tool is disclosed, including a workbench, a mounting plate is fixedly provided on the upper end of the workbench, a rotating seat is rotatably provided inside the mounting plate, a rotating column is fixedly connected to the upper end of the rotating seat, two connecting plates are fixedly provided inside the mounting plate, a mounting plate is fixedly provided on the upper end of the workbench, a hydraulic cylinder is provided on one side of the mounting plate, a push rod is fixedly connected to the insertion end of the hydraulic cylinder, a support plate is fixedly provided on the upper end of the workbench, and a fixed block is fixedly provided on the side of the support plate close to the hydraulic cylinder. In this patent, only stress testing can be performed on deep groove ball bearings, and the radial tension that linear bearings can withstand during movement cannot be tested. Therefore, a linear bearing load and life testing device is needed to solve this problem. Summary of the Invention

[0005] The present invention aims to solve the problems existing in the above-mentioned prior art and provides a linear bearing load and life testing device that can simulate the daily working conditions of the linear bearing and can apply radial tensile loads in both horizontal and vertical directions to the linear bearing to test the maximum load that the linear bearing can withstand.

[0006] The present invention solves its technical problems by adopting a technical solution: This linear bearing load-bearing and life testing device includes a pair of base plates, a support rod installed between the pair of base plates and can be sleeved by the linear bearing; it also includes a first detection part that drives the linear bearing to reciprocate along the support rod, and a second detection part that continuously applies a radial tensile load to the linear bearing when it reciprocates.

[0007] For further improvement, a pair of base plates includes a front plate and a rear plate, a bottom plate is provided at the bottom of the front plate and the rear plate, and the front plate and the rear plate are detachably connected to the bottom plate.

[0008] Further improvement, the support rods are provided in multiple settings and are detachably connected to the front plate and the rear plate.

[0009] Further improved, the first detection part includes a reciprocating plate arranged between a pair of substrates and used to fix the linear bearing, and a driving member used to drive the reciprocating plate to reciprocate between the pair of substrates.

[0010] Further improvement, the driving member includes a driving motor installed on the rear plate, a driving nut fixed on the reciprocating plate, and a driving screw installed on the driving motor and threadedly connected to the driving nut.

[0011] Further improved, the second detection part includes a tension transmission component for transmitting the radial tensile load received by the reciprocating plate to the linear bearing when the reciprocating plate reciprocates, a first tension component and a second tension component for applying radial tensile load to the tension transmission component from different positions when the reciprocating plate reciprocates.

[0012] For further improvement, the tension transmission component includes a sleeve fixed on the reciprocating plate and a through slot opened on the front plate. The sleeve is sleeved on the outside of the driving screw. The inner diameter of the sleeve is larger than the outer diameter of the driving screw, and the sleeve passes through the through slot.

[0013] For further improvement, the first tension component includes a first guide rail fixed on the base plate, a first slider slidingly connected to the first guide rail, a mounting seat fixed on the first slider, a nut seat fixed on the mounting seat, a tension adjustment screw threadedly connected to the nut seat, a tension adjustment nut threadedly connected to the tail of the tension adjustment screw, a tension tester installed on the head of the tension adjustment screw, and a lock installed at one end of the sleeve passing through the through slot and connected to the tension tester. The tension adjustment screw and the tension adjustment nut can cooperate to apply a horizontal radial tension load to the sleeve.

[0014] For further improvement, the first tension component also includes a synchronous motor installed on the base plate and outputting synchronously with the drive motor, a synchronous screw installed on the synchronous motor, a support seat fixed on the base plate and used to support the synchronous screw, a synchronous block threadedly connected to the outside of the synchronous screw, and a connecting block that fixedly connects the synchronous block to the mounting seat.

[0015] To be further improved, the second tension assembly includes an extension plate fixed to one end of the sleeve passing through the through slot, a bolt threadedly connected to the extension plate, a washer arranged between the bolt head and the extension plate, a second guide rail fixed to the base plate, and a second slider slidably connected in the second guide rail and threadedly connected to the tail of the bolt. The bolt applies a radial tensile load in a vertical direction to the sleeve by rotating.

[0016] The beneficial effects of the present invention are: by simulating the daily working conditions of linear bearings and applying radial tensile loads to linear bearings, the present invention breaks through the limitations of traditional tests, fills the gap in dynamic radial load test standards, makes the test results closer to actual application scenarios, and significantly improves the engineering reference value of the test results. In addition, the test process is carried out automatically, which saves manpower and improves test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the tension transmission component, the first tension component, and the second tension component in the present invention;

[0019] Figure 3 Schematic diagram of the structure of the first slider and the synchronization block in the present invention;

[0020] Figure 4 A three-dimensional diagram of the present invention;

[0021] Figure 5 for Figure 4 A is a partial enlargement of the figure.

[0022] Description of the accompanying drawings: base plate 1, front plate 1-1, rear plate 1-2, support rod 2, first detection part 3, reciprocating plate 3-1, driving member 3-2, driving motor 3-2-1, driving nut 3-2-2, driving screw 3-2-3, second detection part 4, tension transmission component 4-1, sleeve 4-1-1, through slot 4-1-2, first tension component 4-2, first guide rail 4-2-1, first slider 4-2-2, mounting seat 4-2-3, nut seat 4- 2-4, tension adjusting screw 4-2-5, tension adjusting nut 4-2-6, tension tester 4-2-7, lock 4-2-8, synchronous motor 4-2-9, synchronous screw 4-2-10, support seat 4-2-11, synchronization block 4-2-12, connecting block 4-2-13, second tension assembly 4-3, extension plate 4-3-1, bolt 4-3-2, washer 4-3-3, second guide rail 4-3-4, second slider 4-3-5, base plate 5. DETAILED DESCRIPTION

[0023] The following provides preferred embodiments of the present invention in conjunction with the accompanying drawings. What is disclosed is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of rights of this new type of use. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0024] Refer to the attached Figures 1 to 5: In this embodiment, the linear bearing load-bearing and life testing device includes a pair of base plates 1, the base plate 1 is composed of a front plate 1-1 and a rear plate 1-2, the front plate 1-1 and the rear plate 1-2 are placed on the bottom plate 5, the front plate 1-1 and the rear plate 1-2 are detachably mounted on the bottom plate 5 by means of angle irons, L-shaped blocks, clamps and other parts, a plurality of support rods 2 are detachably connected between the front plate 1-1 and the rear plate 1-2, the support rods 2 pass through the front plate 1-1 and the rear plate 1-2, and locking nuts are threadedly connected at both ends of the support rods 2, and the locking nuts lock the support rods 2 to the front plate 1-1 and the rear plate 1-2, the linear bearing is sleeved on the support rods 2 and can slide along the support rods 2, a first detection part 3 is provided between the front plate 1-1 and the rear plate 1-2, and a first detection part 3 is provided between the front plate 1-1 and the rear plate 1-2. A detection part 3 is used to drive the linear bearing to reciprocate between the front plate 1-1 and the rear plate 1-2 along the support rod 2, simulating the actual use of the linear bearing; the first detection part 3 includes a reciprocating plate 3-1 arranged between a pair of base plates 1 and a driving member 3-2 for driving the reciprocating plate 3-1 to reciprocate between the front plate 1-1 and the rear plate 1-2. The reciprocating plate 3-1 is provided with a plurality of holes with a diameter larger than the support rod 2. The support rod 2 passes through the holes. The size of the holes matches the size of the linear bearing, so that the linear bearing can be fixedly installed on the reciprocating plate 3-1 through the holes. By applying a radial tensile load to the reciprocating plate 3-1, the radial tensile load can be transferred to the linear bearing. The driving member 3-2 includes a hole installed on the rear plate The driving motor 3-2-1 on 1-2 is provided with a driving screw 3-2-3 passing through the reciprocating plate 3-1, and the driving motor 3-2-1 can drive the driving screw 3-2-3 to rotate, and the reciprocating plate 3-1 is fixedly provided with a driving nut 3-2-2 threadedly connected to the driving screw 3-2-3, and the driving screw 3-2-3 drives the reciprocating plate 3-1 to reciprocate between the front plate 1-1 and the rear plate 1-2 through rotation, and the reciprocating plate 3-1 drives the linear bearing to reciprocate between the front plate 1-1 and the rear plate 1-2 along the support rod 2; a second detection part 4 is also installed on the base plate 5, and the second detection part 4 is used to indirectly apply a continuous The radial tensile load is intended to test the performance of the linear bearing. The second detection part 4 is mainly divided into three parts: the first part is the tension transmission component 4-1, which is detachably fixed on the reciprocating plate 3-1. The tension transmission component 4-1 passes through the front plate 1-1 and can reciprocate with the reciprocating plate 3-1. By applying a radial tensile load to the tension transmission component 4-1, a radial tensile load can be indirectly applied to the reciprocating plate 3-1, thereby applying a radial tensile load to the linear bearing. Generally speaking, the function of the tension transmission component 4-1 is to transmit the radial tensile load received to the linear bearing when the reciprocating plate 3-1 drives the linear bearing to reciprocate.The second part is the first tension component 4-2, which is installed on the base plate 5 and connected to the tension transmission component 4-1. The first tension component 4-2 can apply horizontal radial tension loads of different strengths to the tension transmission component 4-1. When the first tension component 4-2 applies horizontal radial tension loads to the tension transmission component 4-1, it will move together with the tension transmission component 4-1. The third part is the second tension component 4-3, which is installed on the base plate 5 and connected to the tension transmission component 4-1. The first and second tension components 4-2 and 4-3 are connected to the tension transmission component 4-1. The second tension component 4-3 can apply vertical radial tensile loads of varying strengths to the tension transmission component 4-1. When the second tension component 4-3 applies the vertical radial tensile load to the tension transmission component 4-1, it moves along with the tension transmission component 4-1. The first and second tension components 4-2 and 4-3 are not limited to applying horizontal and vertical radial tensile loads to the tension transmission component 4-1; they can also apply other angles, which can be set according to actual needs.

[0025] Refer to the attached Figures 2 to 5 : The tension transmission component 4-1 includes a sleeve 4-1-1 and a through slot 4-1-2 opened on the front plate 1-1. Fixed plates are fixedly installed at both ends of the sleeve 4-1-1. One end of the sleeve 4-1-1 is fixedly installed on the reciprocating plate 3-1, and the other end of the sleeve 4-1-1 passes through the through slot 4-1-2. The inner diameter of the sleeve 4-1-1 is larger than the outer diameter of the driving screw 3-2-3. The sleeve 4-1-1 is sleeved on the outside of the driving screw 3-2-3. The inner wall of the sleeve 4-1-1 does not contact the driving screw 3-2-3. The size of the through slot 4-1-2 is larger than the size of the fixed plate at the end of the sleeve 4-1-1, so that the sleeve 4-1-1 can move together with the reciprocating plate 3-1.

[0026] Refer to the attached Figures 2 to 5: The first tension component 4-2 includes a first guide rail 4-2-1 fixed on the base plate 5, a first slider 4-2-2 is slidably connected to the first guide rail 4-2-1, a mounting seat 4-2-3 is fixedly installed on the top of the first slider 4-2-2, a nut seat 4-2-4 is fixedly installed on the top of the mounting seat 4-2-3, a tension adjustment screw 4-2-5 is threadedly connected to the nut seat 4-2-4, a tension adjustment nut 4-2-6 is threadedly connected to the tail of the tension adjustment screw 4-2-5, a tension tester 4-2-7 is fixedly installed on the head of the tension adjustment screw 4-2-5, a lock buckle 4-2-8 is detachably fixedly installed on the fixing plate at one end of the sleeve 4-1-1 passing through the through slot 4-1-2, and the lock buckle 4-2-8 is fixedly connected to the tension tester 4-2-7. It is optional not to install the tension tester 4-2-7, but to install the tension adjustment screw 4- The head of 2-5 is directly fixedly connected to the lock buckle 4-2-8. By rotating the tension adjusting nut 4-2-6, the tension adjusting screw 4-2-5 can be driven to move along the axial direction, thereby applying a horizontal radial tension load to the sleeve 4-1-1. A synchronous motor 4-2-9 is installed on the base plate 5. A synchronous screw 4-2-10 is installed on the synchronous motor 4-2-9. One end of the synchronous screw 4-2-10 is connected to the synchronous motor 4-2-9. The synchronous motor 4-2-9 can drive the synchronous screw 4-2-10 to rotate. A support seat 4-2-11 is installed on the base plate 5. The support seat 4-2-11 is used to support the rotation of the synchronous screw 4-2-10. The outer side of the synchronous screw 4-2-10 is threadedly connected to a synchronous block 4-2-12. The synchronous block 4-2-12 is fixedly mounted with a connecting block 4-2-13 fixedly connected to the mounting seat 4-2-3. The synchronous motor 4-2-9 and the synchronous screw 4-2-10 cooperate to make the mounting seat 4-2-3 and the reciprocating plate 3-1 reciprocate synchronously, thereby driving the tension adjustment screw 4-2-5 and the reciprocating plate 3-1 to reciprocate synchronously. Specifically, the specifications of the synchronous screw 4-2-10 are the same as those of the driving screw 3-2-3, and the speed of the synchronous motor 4-2-9 is the same as that of the driving motor 3-2-1.

[0027] Refer to the attached Figures 2 to 5: The second tension component 4-3 includes an extension plate 4-3-1 fixed to the sleeve 4-1-1 passing through one end of the through slot 4-1-2, a bolt 4-3-2 is vertically installed on the extension plate 4-3-1, the bolt 4-3-2 passes through the extension plate 4-3-1, the bolt 4-3-2 is threadedly connected to the extension plate 4-3-1, a washer 4-3-3 is provided between the head of the bolt 4-3-2 and the top of the extension plate 4-3-1, a second guide rail 4-3-4 is fixedly installed on the bottom plate 5, a second slider 4-3-5 is slidably connected to the second guide rail 4-3-4, a threaded hole matching the bolt 4-3-2 is opened on the top of the second slider 4-3-5, the tail of the bolt 4-3-2 is threadedly connected in the threaded hole, the bolt 4- 3-2 applies a vertical radial tensile load to the sleeve 4-1-1 by rotating. The bolt 4-3-2 moves downward during rotation and applies a vertical downward radial tensile load to the extension plate 4-3-1 through the washer 4-3-3. After being subjected to the force, the extension plate 4-3-1 transmits the vertical downward radial tensile load to the sleeve 4-1-1. When the sleeve 4-1-1 reciprocates, the bolt 4-3-2 can push the second slider 4-3-5 to slide in the second guide rail 4-3-4. Lubricating oil can be filled between the second slider 4-3-5 and the second guide rail 4-3-4 to reduce friction, or balls can be installed at the contact part of the second slider 4-3-5 and the second guide rail 4-3-4 to reduce friction.

[0028] When in use, first adjust the speed of the drive motor 3-2-1 and the synchronous motor 4-2-9 so that the distance of the reciprocating plate 3-1 driven by the drive screw 3-2-3 is the same as the distance of the reciprocating motion of the first slider 4-2-2 driven by the synchronous screw 4-2-10. Then, sleeve the linear bearing on the support rod 2, and then fix the linear bearing on the reciprocating plate 3-1. The linear bearing can slide along the support rod 2. By rotating the tension adjustment nut 4-2-6, the tension adjustment screw 4-2-5 can be adjusted to apply a horizontal radial tension load to the sleeve 4-1-1. The tension tester 4-2-7 can measure the current tension size, and the sleeve 4-1-1 transfers the tensile load it receives to the reciprocating plate 3-1, and the reciprocating plate 3-1 then transfers the tensile load it receives to the linear bearing, so that the linear bearing is subjected to a radial tensile load in the horizontal direction when performing reciprocating motion. In addition, the bolt 4-3-2 can be rotated to apply a radial tensile load in the vertical direction to the sleeve 4-1-1, so that the linear bearing is subjected to radial tensile loads in both the horizontal and vertical directions when performing reciprocating motion, so as to better simulate the actual usage scenario.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A linear bearing load and life testing device, comprising a pair of base plates (1), and a support rod (2) mounted between the pair of base plates (1) and capable of being sleeved by the linear bearing; characterized in that: It also includes a first detection part (3) that drives the linear bearing to reciprocate along the support rod (2), and a second detection part (4) that continuously applies a radial tensile load to the linear bearing when the linear bearing reciprocates.

2. The linear bearing load and life testing device according to claim 1, characterized in that: The pair of base plates (1) comprises a front plate (1-1) and a rear plate (1-2), a bottom plate (5) being provided at the bottom of the front plate (1-1) and the rear plate (1-2), and the front plate (1-1) and the rear plate (1-2) being detachably connected to the bottom plate (5).

3. The linear bearing load and life testing device according to claim 1, characterized in that: The support rods (2) are provided in multiple configurations and are detachably connected to the front plate (1-1) and the rear plate (1-2).

4. The linear bearing load and life testing device according to claim 1, characterized in that: The first detection part (3) comprises a reciprocating plate (3-1) provided between a pair of substrates (1) and used for fixing a linear bearing, and a driving member (3-2) used for driving the reciprocating plate (3-1) to reciprocate between the pair of substrates (1).

5. The linear bearing load and life testing device according to claim 4, characterized in that: The driving member (3-2) comprises a driving motor (3-2-1) mounted on the rear plate (1-2), a driving nut (3-2-2) fixed on the reciprocating plate (3-1), and a driving screw (3-2-3) mounted on the driving motor (3-2-1) and threadedly connected to the driving nut (3-2-2).

6. The linear bearing load and life testing device according to claim 4, characterized in that: The second detection part (4) comprises a tension transmission component (4-1) for transmitting a radial tension load received by the reciprocating plate (3-1) to a linear bearing when the reciprocating plate (3-1) reciprocates, a first tension component (4-2) and a second tension component (4-3) for applying radial tension loads to the tension transmission component (4-1) from different directions when the reciprocating plate (3-1) reciprocates.

7. The linear bearing load and life testing device according to claim 6, characterized in that: The tension transmission component (4-1) includes a sleeve (4-1-1) fixed on the reciprocating plate (3-1) and a through slot (4-1-2) opened on the front plate (1-1). The sleeve (4-1-1) is sleeved on the outside of the driving screw (3-2-3). The inner diameter of the sleeve (4-1-1) is larger than the outer diameter of the driving screw (3-2-3). The sleeve (4-1-1) passes through the through slot (4-1-2).

8. The linear bearing load and life testing device according to claim 7, characterized in that: The first tension assembly (4-2) comprises a first guide rail (4-2-1) fixed on the base plate (5), a first slider (4-2-2) slidably connected to the first guide rail (4-2-1), a mounting seat (4-2-3) fixed on the first slider (4-2-2), a nut seat (4-2-4) fixed on the mounting seat (4-2-3), a tension adjustment screw (4-2-5) threadedly connected to the nut seat (4-2-4), and a tension adjustment screw (4-2-5) threadedly connected to the tension adjustment screw (4-2-6). 2-5), a tension adjustment nut (4-2-6) at the tail end of the tension adjustment screw (4-2-5), a tension tester (4-2-7) installed at the head of the tension adjustment screw (4-2-5), and a lock (4-2-8) installed at one end of the sleeve (4-1-1) passing through the through slot (4-1-2) and connected to the tension tester (4-2-7). The tension adjustment screw (4-2-5) and the tension adjustment nut (4-2-6) can apply a horizontal radial tension load to the sleeve (4-1-1) through cooperation.

9. The linear bearing load and life testing device according to claim 8, characterized in that: The first tension assembly (4-2) further includes a synchronous motor (4-2-9) mounted on the base plate (5) and outputting synchronously with the drive motor (3-2-1), a synchronous screw (4-2-10) mounted on the synchronous motor (4-2-9), a support seat (4-2-11) fixed on the base plate (5) and used to support the synchronous screw (4-2-10), a synchronous block (4-2-12) threadedly connected to the outside of the synchronous screw (4-2-10), and a connecting block (4-2-13) fixedly connecting the synchronous block (4-2-12) to the mounting seat (4-2-3).

10. The linear bearing load and life testing device according to claim 6, characterized in that: The second tension assembly (4-3) includes an extension plate (4-3-1) fixed to one end of the sleeve (4-1-1) passing through the through slot (4-1-2), a bolt (4-3-2) threadedly connected to the extension plate (4-3-1), a washer (4-3-3) arranged between the head of the bolt (4-3-2) and the extension plate (4-3-1), a second guide rail (4-3-4) fixed to the base plate (5), and a second slider (4-3-5) slidably connected in the second guide rail (4-3-4) and threadedly connected to the tail of the bolt (4-3-2). The bolt (4-3-2) applies a vertical radial tensile load to the sleeve (4-1-1) by rotating.

Images