Interlayer bonding strength tester and encoder assembly thereof
By using external bearings and non-contact measurement technology, the problem of encoder accuracy degradation in paper interlayer bonding force detection devices has been solved, achieving high-precision and low-energy-consumption measurement results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-31
AI Technical Summary
In existing paper interlayer bonding force detection devices, the built-in bearings cause problems such as decreased encoder measurement accuracy, increased energy consumption, and unstable performance.
By placing the bearing outside the encoder housing, non-contact angle measurement is adopted. Through the cooperation of the grating disk and photoelectric sensor, the oscillating spindle is independently subjected to mechanical load by the frame, avoiding bearing friction interference. The double support structure improves the deformation resistance of the oscillating spindle.
It achieves high-precision non-contact measurement, reduces energy consumption, improves measurement stability and accuracy, and ensures the geometric accuracy of the motion trajectory of the swing spindle.
Smart Images
Figure CN224066598U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of paper quality testing technology, and relates to an interlayer bonding strength tester and its encoder assembly. Background Technology
[0002] Paper interlayer bonding strength testing is a key indicator for assessing the structural integrity of paper. The testing device mainly includes an encoder, a swing spindle, a swing arm, and a frame. The swing spindle is directly connected to the encoder via a coupling, and the swing arm is fixed to the end of the spindle. When the swing arm swings freely downward under the action of gravity, it drives the swing spindle to rotate. The encoder calculates the bonding strength value by recording the change in rotation angle.
[0003] To simplify installation, existing technology incorporates bearings into the encoder. However, when the lever swings freely, it generates radial force, axial force, and vibration. These loads are directly transmitted to the encoder through the bearings, which can lead to a decrease in encoder measurement accuracy or even damage. Furthermore, the built-in bearings generate friction during rotation, resulting in the loss of mechanical energy and its conversion into heat, which raises the encoder temperature. This not only increases the encoder's energy consumption but may also affect its performance and stability. Utility Model Content
[0004] The purpose of this invention is to address the above-mentioned problems by providing an encoder assembly for an interlayer bond strength tester.
[0005] Another objective of this invention is to provide an interlayer bonding strength measuring instrument.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An encoder assembly for an interlayer bonding strength tester includes an encoder housing disposed between the rear end of a swing spindle and a frame. A grating disk is provided inside the encoder housing. The rear end of the swing spindle passes through the spindle hole of the encoder housing and is fixed to the grating disk. A photoelectric sensor is provided between the encoder housing and the grating disk. At least one first bearing located outside the encoder housing is provided between the swing spindle and the frame.
[0008] At least one first bearing is placed outside the encoder housing. No bearing is set inside the encoder housing, which is only responsible for the angle measurement of the swing spindle. This allows the mechanical load of the swing spindle to be borne independently by the frame, which can avoid the bearing friction from interfering with the grating signal. This achieves non-contact angle measurement, eliminates the interference of mechanical friction on the signal, and can effectively reduce energy consumption and improve measurement accuracy.
[0009] In the encoder assembly of the interlayer bonding strength tester described above, the encoder housing includes an end ring, the end ring has a spindle hole at its center, a positioning protrusion is provided at one end of the end ring on the spindle hole, the positioning protrusion is integrated with the end ring, and a rear cover is provided at the end of the end ring away from the positioning protrusion.
[0010] The positioning protrusion ring is located between the end ring and the frame and plays a positioning role. The back cover plays a protective role, preventing dust from entering the gap between the grating disk and the photoelectric sensor and ensuring signal stability.
[0011] In the encoder assembly of the interlayer bonding strength tester mentioned above, the positioning convex ring is embedded in one end of the first bearing mounting hole of the frame, the first bearing mounting hole is provided with a first bearing, and the swing spindle passes through the first bearing.
[0012] In the encoder assembly of the interlayer bonding strength tester mentioned above, a second bearing mounting hole is provided on the other end of the frame, a second bearing is installed in the second bearing mounting hole, and the front end of the swing spindle is set on the second bearing.
[0013] The swing spindle is supported by a span of a first bearing and a second bearing located outside the encoder housing. The dual support significantly improves the swing spindle's resistance to deformation and ensures the geometric accuracy of the test pendulum's motion trajectory. The external bearings block the transmission path of the test pendulum's kinetic energy to the inside of the encoder housing, eliminating mechanical interference. The dual bearings constrain the radial and axial degrees of freedom of the swing spindle, which can significantly reduce the swing spindle's deflection.
[0014] In the encoder assembly of the interlayer bonding strength tester mentioned above, the outer ring of the first bearing in the first bearing mounting hole is axially positioned and connected to it, and the inner ring of the first bearing in the first bearing mounting hole is axially positioned with the swing spindle.
[0015] The outer ring of the second bearing in the second bearing mounting hole is axially positioned and connected to it, and the inner ring of the second bearing in the second bearing mounting hole is axially positioned with the swing spindle.
[0016] The first bearing and the second bearing are axially limited within the first bearing mounting hole and the second bearing mounting hole, respectively. This limits the bearing's degree of freedom in the axial direction of the swing spindle and prevents unexpected axial movement of the inner and outer rings of the bearing, thereby ensuring measurement accuracy and reducing wear.
[0017] In the encoder assembly of the interlayer bonding strength tester mentioned above, the swing spindle is provided with a first shoulder, and a retaining ring is sleeved at the corresponding end of the swing spindle. The two sides of the inner ring of the first bearing abut against the first shoulder and the retaining ring respectively.
[0018] A limiting ring is provided in the first bearing mounting hole between the first bearing and the positioning convex ring. The two sides of the limiting ring abut against one side of the positioning convex ring and one side of the outer ring of the first bearing, respectively. A first bearing cover is provided on the other end of the first bearing mounting hole. The first bearing cover abuts against the other side of the outer ring of the first bearing.
[0019] The first shoulder and retaining ring axially limit the inner ring of the first bearing; the limiting ring and the first bearing cap axially limit the outer ring of the first bearing.
[0020] In the encoder assembly of the interlayer bonding strength tester mentioned above, the swing spindle is provided with a second shoulder, and a stop washer and a locking nut are sleeved on the corresponding end of the swing spindle. The two sides of the inner ring of the second bearing abut against the second shoulder and the stop washer respectively.
[0021] The second bearing mounting hole is provided with end caps and second bearing pressure caps at both ends, and the end caps and second bearing pressure caps abut against the two sides of the outer ring of the second bearing, respectively.
[0022] The second shoulder and retaining washer axially limit the inner ring of the second bearing; the end cover and the second bearing cap axially limit the outer ring of the second bearing.
[0023] In the encoder assembly of the interlayer bonding strength tester described above, the frame includes an inverted concave bearing bracket, which is connected to the chassis via a vertical plate. The bearing bracket has a first bearing mounting hole and a second bearing mounting hole at both ends.
[0024] In the encoder assembly of the interlayer bonding strength tester described above, an encoder mounting cavity is provided between the upright plate and the bearing bracket. The upright plate and the bearing bracket are fixed by a detachable structure. The encoder housing is fixed inside the encoder mounting cavity. A wire hole is provided on the upright plate to connect the chassis and the encoder mounting cavity. The wiring terminal of the photoelectric sensor is located at the lower end near the wire hole.
[0025] The encoder mounting cavity is used for positioning and mounting the encoder housing. The upright plate and bearing bracket are detachably connected, making disassembly and assembly convenient and easy to maintain.
[0026] An interlayer bond strength tester includes a body, on which an encoder assembly for the interlayer bond strength tester is provided.
[0027] Compared with existing technologies, the advantages of this invention are as follows: 1. External bearings block the transmission path of the test pendulum's kinetic energy to the encoder housing, achieving non-contact angle measurement, eliminating mechanical friction interference with the signal, and effectively reducing energy consumption and improving measurement accuracy. 2. The span-double support significantly improves the deformation resistance of the swing spindle, ensuring the geometric accuracy of the test pendulum's motion trajectory. 3. The double bearings constrain the radial and axial degrees of freedom of the swing spindle, which can significantly reduce the deflection of the swing spindle. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure provided by this utility model;
[0029] Figure 2 This is a schematic diagram of the encoder assembly;
[0030] Figure 3 This is a cross-sectional view of the encoder component;
[0031] Figure 4 This is a schematic diagram showing the distribution of bearings on the oscillating spindle;
[0032] Figure 5 This is a structural diagram of the frame;
[0033] Figure 6 This is a schematic diagram of the structure of the grating disk and the photoelectric sensor;
[0034] Figure 7 This is a structural diagram of the upright plate.
[0035] In the diagram, the components are: 1. Swing spindle; 2. Frame; 3. Encoder housing; 4. Grating disk; 5. Spindle hole; 6. Photoelectric sensor; 7. First bearing; 8. Test swing rod; 9. End ring; 10. Positioning convex ring; 11. Rear cover; 12. First bearing mounting hole; 13. Second bearing mounting hole; 14. First shaft shoulder; 15. Snap ring; 16. Limiting ring; 17. First bearing cover; 18. Second shaft shoulder; 19. Locking washer; 20. End cover; 21. Second bearing cover; 22. Bearing bracket; 23. Vertical plate; 24. Chassis; 25. Encoder mounting cavity; 26. Wire hole; 27. Machine body; 28. Detection table; 29. Test seat; 30. Sample seat; 31. Weight; 33. Spherical impact block; 34. Electromagnet; 36. Buffer pad; 37. Annular baffle; 38. Second bearing; 39. Detailed Implementation
[0036] like Figures 1-7As shown, an encoder assembly for an interlayer bonding strength tester includes an encoder housing 3 disposed between the rear end of a swing spindle 1 and a frame 2. A grating disk 4 is disposed inside the encoder housing 3. The rear end of the swing spindle 1 passes through a spindle hole 5 in the encoder housing 3 and is fixed to the grating disk 4. A photoelectric sensor 6 is disposed between the encoder housing 3 and the grating disk 4. At least one first bearing 7 located outside the encoder housing 3 is disposed between the swing spindle 1 and the frame 2.
[0037] In this invention, when the test pendulum 8 on the swing spindle 1 swings freely downward under the action of gravity, it drives the swing spindle 1 to rotate. When the grating disk 4 at the rear end of the swing spindle 1 rotates, it works in conjunction with the photoelectric sensor 6 to accurately measure the rotation angle of the swing spindle 1. Finally, the interlayer bonding force of the paper is calculated by recording the change in rotation angle.
[0038] At least one first bearing 7 is externally mounted on the encoder housing 3. The encoder housing 3 does not have a bearing inside and is only responsible for the angle measurement of the swing spindle 1. This allows the mechanical load of the swing spindle 1 to be borne independently by the frame 2, which can avoid the bearing friction from interfering with the grating signal, realize non-contact angle measurement, eliminate the interference of mechanical friction on the signal, and effectively reduce energy consumption and improve measurement accuracy.
[0039] Specifically, combining Figures 2-6 As shown, the encoder housing 3 includes an end ring 9, with a main shaft hole 5 at the center of the end ring 9. A positioning protrusion 10 is located on the main shaft hole 5 at one end of the end ring 9. The positioning protrusion 10 is integrated with the end ring 9. A rear cover 11 is provided at the end of the end ring 9 away from the positioning protrusion 10.
[0040] The spindle hole 5 of the end ring 9 is fixed to the grating disk 4 at the rear end of the swing spindle 1. The positioning protrusion 10 is located between the end ring 9 and the frame 2 to play a positioning role. The rear cover 11 plays a protective role, preventing dust from entering the gap between the grating disk 4 and the photoelectric sensor 6, and ensuring signal stability.
[0041] Specifically, combining Figures 2-5 As shown, the rear cover 11 is connected to the end ring 9 by a snap-fit, screw-fit, or adhesive structure.
[0042] The back cover 11 and the end ring 9 are detachably connected, making disassembly and assembly convenient and easy to maintain.
[0043] Specifically, combining Figures 2-6 As shown, the positioning convex ring 10 is embedded in one end of the first bearing mounting hole 12 of the frame 2. The first bearing 7 is provided in the first bearing mounting hole 12, and the swing spindle 1 passes through the first bearing 7. The other end of the frame 2 is provided with a second bearing mounting hole 13, and a second bearing 39 is installed in the second bearing mounting hole 13. The front end of the swing spindle 1 is set on the second bearing 39.
[0044] The swing spindle 1 is supported by a span of a first bearing 7 and a second bearing 39 externally mounted on the encoder housing 3. The dual support greatly improves the deformation resistance of the swing spindle 1 and ensures the geometric accuracy of the motion trajectory of the test pendulum 8. The external first bearing 7 and second bearing 39 block the transmission path of the kinetic energy of the test pendulum 8 to the inside of the encoder housing 3, eliminating mechanical interference. The dual bearings constrain the radial and axial degrees of freedom of the swing spindle 1, which can significantly reduce the deflection of the swing spindle 1.
[0045] Specifically, combining Figures 2-6 As shown, the outer ring of the first bearing 7 in the first bearing mounting hole 12 is axially positioned and connected to it, and the inner ring of the first bearing 7 in the first bearing mounting hole 12 is axially positioned with the swing spindle 1.
[0046] The outer ring of the second bearing 39 inside the second bearing mounting hole 13 is axially positioned and connected to it, while the inner ring of the second bearing 39 inside the second bearing mounting hole 13 is axially positioned with the swing spindle 1.
[0047] The first bearing 7 and the second bearing 39 are axially limited within the first bearing mounting hole 12 and the second bearing mounting hole 13, respectively. This limits the degree of freedom of the first bearing 7 and the second bearing 39 in the axial direction of the swing spindle, preventing unexpected axial movement of the inner and outer rings of the bearings, thereby ensuring measurement accuracy and reducing wear.
[0048] Specifically, combining Figures 2-6 As shown, the swing spindle 1 is provided with a first shoulder 14, and a retaining ring 15 is sleeved on the corresponding end of the swing spindle 1. The two sides of the inner ring of the first bearing 7 abut against the first shoulder 14 and the retaining ring 15 respectively.
[0049] A limiting ring 16 is provided in the first bearing mounting hole 12 between the first bearing 7 and the positioning convex ring 10. The two sides of the limiting ring 16 abut against the positioning convex ring 10 and one side of the outer ring of the first bearing 7, respectively. A first bearing cover 17 is provided on the other end of the first bearing mounting hole 12. The first bearing cover 17 abuts against the other side of the outer ring of the first bearing 7.
[0050] The first shoulder 14 and the retaining ring 15 axially limit the inner ring of the first bearing 7; the limiting ring 16 and the first bearing cap 17 axially limit the outer ring of the first bearing 7.
[0051] Specifically, combining Figures 2-6 As shown, the swing spindle 1 is provided with a second shoulder 18, and a stop washer 19 and a locking nut 20 are sleeved on the corresponding end of the swing spindle 1. The two sides of the inner ring of the second bearing 39 abut against the second shoulder 18 and the stop washer 19 respectively.
[0052] The second bearing mounting hole 13 is provided with end caps 21 and second bearing covers 22 at both ends, and the end caps 21 and second bearing covers 22 abut against the two sides of the outer ring of the second bearing 39 respectively.
[0053] The second shoulder 18 and the retaining washer 19 axially limit the inner ring of the second bearing 39; the end cover 21 and the second bearing cap 22 axially limit the outer ring of the second bearing 39.
[0054] Specifically, combining Figures 1-3 As shown, the frame 2 includes an inverted concave bearing bracket 23, which is connected to the chassis 25 via a vertical plate 24. The bearing bracket 23 has a first bearing mounting hole 12 and a second bearing mounting hole 13 at both ends.
[0055] Specifically, combining Figure 1 and Figure 7 As shown, an encoder mounting cavity 26 is provided between the upright plate 24 and the bearing bracket 23. The upright plate 24 and the bearing bracket 23 are fixed by a detachable structure. The encoder housing 3 is fixed in the encoder mounting cavity 26. A wire hole 27 is provided on the upright plate 24 to connect the chassis 25 and the encoder mounting cavity 26. The wiring terminal of the photoelectric sensor 6 is located at the lower end near the wire hole 27.
[0056] The encoder mounting cavity 26 is used for positioning and mounting the encoder housing 3. The upright plate 24 is detachably connected to the bearing bracket 23, which is convenient for disassembly and assembly and easy for maintenance.
[0057] like Figures 1-7 As shown, an interlayer bond strength tester includes a body 28, on which an encoder assembly for the interlayer bond strength tester is provided.
[0058] The machine body 28 is equipped with a test platform 29, a test seat 30 is provided on the test platform 29, a sample seat 31 is provided on the test seat 30, an L-shaped impact test block is provided on the sample seat 31, a test pendulum 8 is sleeved on the swing spindle 1, a weight 33 is sleeved on the test pendulum 8, a spherical impact block 34 that cooperates with the L-shaped impact test block is provided at the bottom of the test pendulum 8, an electromagnet 36 that cooperates with the test pendulum 8 is provided on the bearing bracket 23, and a buffer pad 37 and an annular baffle 38 are also provided on the test platform 29.
[0059] The working principle of this utility model is as follows: the test pendulum 8 on the swing spindle 1 swings freely downward under the action of gravity, and the spherical impact block 34 on the test pendulum 8 impacts the L-shaped impact test block; when the test pendulum 8 swings freely downward under the action of gravity, it drives the swing spindle 1 to rotate. When the grating disk 4 at the rear end of the swing spindle 1 rotates, it works in conjunction with the photoelectric sensor 6 to accurately measure the rotation angle of the swing spindle 1, and finally calculates the interlayer bonding force of the paper by recording the change in rotation angle.
[0060] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
[0061] Although this article frequently uses terms such as 1. swing spindle, 2. frame, 3. encoder housing, 4. grating disk, 5. spindle hole, 6. photoelectric sensor, 7. first bearing, 8. test swing rod, 9. end ring, 10. positioning convex ring, 11. rear cover, 12. first bearing mounting hole, 13. second bearing mounting hole, 14. first shaft shoulder, 15. retaining ring, 16. first bearing cover, 17. second shaft shoulder, 18. stop washer, 19. locking nut, 20. end cover, 21. second bearing cover, 22. bearing bracket, 23. upright plate, 24. chassis, 25. encoder mounting cavity, 26. wire hole, 27. machine body, 28. testing platform, 29. test seat, 30. sample seat, 31. weight, 33. spherical impact block, 34. electromagnet, 36. buffer pad, 37. annular baffle, 38. second bearing, etc., these terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.
Claims
1. An encoder assembly for an interfacial bond strength tester, comprising: The application relates to a swing main shaft (1) and a frame body (2), and comprises an encoder shell (3) arranged between the rear end of the swing main shaft (1) and the frame body (2), a grating disc (4) is arranged in the encoder shell (3), the rear end of the swing main shaft (1) penetrates a main shaft hole (5) of the encoder shell (3) and is fixed with the grating disc (4), a photoelectric sensor (6) is arranged between the encoder shell (3) and the grating disc (4), and at least one first bearing (7) is arranged between the swing main shaft (1) and the frame body (2) and located outside the encoder shell (3).
2. The encoder assembly of claim 1, wherein, The encoder shell (3) comprises an end ring (9), the center of the end ring (9) is provided with the main shaft hole (5), one end of the end ring (9) is provided with a positioning convex ring (10) located on the main shaft hole (5), the positioning convex ring (10) is integrated with the end ring (9), and the end, away from the positioning convex ring (10), of the end ring (9) is provided with a rear cover (11).
3. The encoder assembly of claim 2, wherein, The positioning convex ring (10) is embedded in one end of a first bearing mounting hole (12) of the frame body (2), the first bearing (7) is arranged in the first bearing mounting hole (12), and the swing main shaft (1) penetrates the first bearing (7).
4. The encoder assembly of claim 3, wherein, The other end of the frame body (2) is provided with a second bearing mounting hole (13), the second bearing (39) is arranged in the second bearing mounting hole (13), and the front end of the swing main shaft (1) is arranged on the second bearing (39).
5. The encoder assembly of claim 4, wherein, The outer ring of the first bearing (7) in the first bearing mounting hole (12) is connected with the axial positioning, and the inner ring of the first bearing (7) in the first bearing mounting hole (12) is axially positioned with the swing main shaft (1); The outer ring of the second bearing (39) in the second bearing mounting hole (13) is connected with the axial positioning, and the inner ring of the second bearing (39) in the second bearing mounting hole (13) is axially positioned with the swing main shaft (1).
6. The encoder assembly of claim 5, wherein, The swing main shaft (1) is provided with a first shaft shoulder (14), a snap ring (15) is sleeved on the corresponding end of the swing main shaft (1), the two sides of the inner ring of the first bearing (7) are respectively abutted against the first shaft shoulder (14) and the snap ring (15); The first bearing mounting hole (12) is provided with a limiting ring (16) between the first bearing (7) and the positioning convex ring (10), the two sides of the limiting ring (16) are respectively abutted against one side of the outer ring of the first bearing (7) and the positioning convex ring (10), a first bearing gland (17) is arranged on the other end of the first bearing mounting hole (12), and the other side of the outer ring of the first bearing (7) is abutted against the first bearing gland (17).
7. The encoder assembly of claim 5, wherein, The swing main shaft (1) is provided with a second shaft shoulder (18), a stop washer (19) and a locking nut (20) are sleeved on the corresponding end of the swing main shaft (1), the two sides of the inner ring of the second bearing (39) are respectively abutted against the second shaft shoulder (18) and the stop washer (19); The two ends of the second bearing mounting hole (13) are respectively provided with an end cover (21) and a second bearing gland (22), and the two sides of the outer ring of the second bearing (39) are respectively abutted against the end cover (21) and the second bearing gland (22).
8. The encoder assembly of claim 4, wherein, The frame body (2) comprises a bearing support (23) in reverse concave shape, the bearing support (23) is connected with the cabinet (25) through a vertical plate (24), and the bearing support (23) is respectively provided with the first bearing mounting hole (12) and the second bearing mounting hole (13) at two ends.
9. The encoder assembly of claim 8, wherein, A code installation cavity (26) is arranged between the vertical plate (24) and the bearing support (23), the vertical plate (24) and the bearing support (23) are fixed through a detachable structure, the code shell (3) is fixed in the code installation cavity (26), the vertical plate (24) is provided with a wire hole (27) penetrating and communicating the cabinet (25) and the code installation cavity (26), and the wiring end of the photoelectric sensor (6) is located at the lower end close to the wire hole (27).
10. An interlayer bond strength tester comprising a body (28), characterised in that, The machine body (28) is provided with the code assembly of the interlayer bonding strength tester according to any one of claims 1-9.