CN218211711U - Sliding friction force detection equipment - Google Patents

Abstract

The utility model discloses a sliding friction check out test set, including frame, drive arrangement, removal subassembly, pull rod, friction model and centre gripping unit, it is provided with the pull rod to slide in the frame, the pull rod is fixed with the removal subassembly, it is connected with the drive arrangement transmission to remove the subassembly, the friction model has been erect in the frame, friction model both sides are equipped with the centre gripping unit, the centre gripping unit is used for the fixed test appearance piece, the centre gripping unit includes the grip slipper and compresses tightly the subassembly, can dismantle on the grip slipper and be connected with and compress tightly the subassembly, it includes mount pad and briquetting to compress tightly the subassembly, the grip slipper is dismantled and is connected with the mount pad, the mount pad end fixing has the briquetting, the briquetting set up in the grip slipper top, the briquetting is used for compressing tightly on experimental appearance piece upper portion. The beneficial effects of the utility model are that, through being equipped with the packing force that compresses tightly the subassembly and act on experimental sample piece stable in surface, avoid taking place the drunkenness between experimental sample piece and the friction model and influence the test result.

Description

Sliding friction force detection equipment

Technical Field

The utility model relates to a sliding friction force check out test set technical field, especially sliding friction force check out test set.

Background

When the brake is processed, technical requirements on the initial tension of the starting brake, the wire pulling stroke and other technical parameters are required, so that the braking effect of the brake is ensured, and a friction force detection test is required after the brake material is selected. When two or more objects are contacted, friction force can be generated, and when there is a movement trend and there is no actual relative movement, the friction force is static friction force; when the two objects overcome the maximum static friction force, relative motion is generated, and the friction force at the moment is sliding friction force. When the sliding friction force is researched, a test sample block of a brake material is in contact with a friction sample plate, a driving device drives the friction sample plate to move along the test sample block, the sliding friction force value is obtained according to the size of the detected pulling force of a pulling force detection piece, but the test sample block is unstable and easy to shift when being fixed, and when the pulling force is detected, the result is the resultant force in multiple directions, so that the measurement result of the sliding friction force is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem, a sliding friction force detection device is designed. The device comprises a rack, a driving device, a moving assembly, a pull rod, a friction sample plate and clamping units, wherein the pull rod is arranged on the rack in a sliding manner, the pull rod is fixedly provided with the moving assembly, the moving assembly is in transmission connection with the driving device, the friction sample plate is erected on the rack, the clamping units are arranged on two sides of the friction sample plate and used for fixing a test sample piece, and a tension sensor is fixed between the pull rod and the friction sample plate; the clamping unit comprises a clamping seat and a pressing assembly, the clamping seat is detachably connected with the pressing assembly, the pressing assembly comprises a mounting seat and a pressing block, the clamping seat is detachably connected with the mounting seat, the end part of the mounting seat is fixedly provided with a pressing block, the pressing block is arranged above the clamping seat, and the pressing block is used for pressing the upper part of the test sample piece.

Furthermore, the clamping unit further comprises a fixing piece, a first mounting hole is formed in the mounting seat, a second mounting hole is formed in the clamping seat, and the fixing piece penetrates through the first mounting hole, the second mounting hole and the clamping seat in threaded connection.

Furthermore, the first mounting holes are long holes, the second mounting holes are round holes, at least two second mounting holes are arranged, and the fixing piece is matched with one of the second mounting holes.

Further, a speed reducing structure is arranged between the driving device and the moving assembly.

Further, the speed reduction structure includes worm and worm wheel, the worm with drive arrangement fixed connection, the worm meshing has the worm wheel, wear to be equipped with first pivot in the worm wheel.

Furthermore, the moving assembly comprises a first bevel gear, a second bevel gear, a positioning rod, a driving seat, a first guide rod, a second guide rod, a first guide seat and a box body, the first bevel gear is arranged on the first rotating shaft sleeve, the second bevel gear is meshed with the first bevel gear, the positioning rod is fixed on the second bevel gear, the driving seat is penetrated by the positioning rod, the first guide rod and the second guide rod are respectively fixed at two ends of the driving seat, the first guide rod and the second guide rod are respectively penetrated by the first guide seat, the first guide seat is fixed on the box body, the box body is fixed on the rack, and the pull rod is fixed on the first guide rod.

Further, the centre gripping unit still includes the tensioning subassembly, first mounting hole with the second mounting hole is the slot hole, the tensioning subassembly is including adjusting pole, elastic component and setting element, adjusts the pole and wears to locate the mount pad stretches into in the first mounting hole, the elastic component both ends are fixed in respectively adjust the pole tip with in the mount pad, the setting element passes in proper order adjust the pole with the grip slipper.

Furtherly, the grip slipper slides and is provided with the position control subassembly, the position control subassembly is fixed with the propulsion cylinder, the position control subassembly includes second guide holder, third guide bar and regulating plate, propulsion cylinder fixedly connected with connecting plate, the connecting plate is fixed with two at least third guide bars, the third guide bar passes in proper order the second guide holder with the grip slipper, the third guide bar stretches into one end in the grip slipper is fixed with the regulating plate.

Utilize the technical scheme of the utility model sliding friction force detection equipment of preparation, the beneficial effect who reaches: the friction sample plate has test sample parts symmetrically set on two sides and the two test sample parts clamp the middle friction sample plate. The pull rod drives the tension sensor and the friction sample plate to move forwards, the sliding friction force of a measured object is detected by monitoring an output signal of the tension sensor in the relative movement process of the friction sample plate and the test sample piece, and the stable pressing force of the pressing assembly acting on the surface of the test sample piece is arranged, so that the test result is prevented from being influenced by play between the test sample piece and the friction sample plate.

Drawings

Fig. 1 is a perspective view of an embodiment of the sliding friction force detecting apparatus of the present invention;

fig. 2 is a front view of an embodiment of the sliding friction force detecting device according to the present invention;

fig. 3 is a schematic diagram illustrating a connection between a driving device and a moving component according to an embodiment of the sliding friction force detecting apparatus of the present invention;

fig. 4 is a top view of an embodiment of the sliding friction force detecting device according to the present invention;

fig. 5 is a schematic structural diagram of a clamping unit according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an internal structure of a first embodiment of the sliding friction force detecting apparatus according to the present invention;

fig. 7 is a schematic view of a use state of the sliding friction force detecting apparatus according to the present invention;

fig. 8 is a schematic structural view of a clamping unit of a second embodiment of the sliding friction force detecting apparatus according to the present invention;

figure 9 is an enlarged view of a portion of figure 8 at reference a in accordance with the present invention;

fig. 10 is a schematic structural diagram of a three-position adjusting assembly of an embodiment of the sliding friction force detecting apparatus according to the present invention;

in the figure, 1, a frame; 2. a drive device; 3. a moving assembly; 31. a first bevel gear; 32. a second bevel gear; 33. positioning a rod; 34. a driving seat; 35. a first guide bar; 36. a second guide bar; 37. a box body; 38. a first guide seat; 4. a pull rod; 5. rubbing the sample plate; 6. a clamping unit; 61. a clamping seat; 62. a compression assembly; 621. a mounting seat; 622. pressing into blocks; 63. a fixing member; 64. a first mounting hole; 65. a second mounting hole; 66. a tension assembly; 661. adjusting a rod; 662. an elastic member; 663. a positioning member; 7. a position adjustment assembly; 71. propelling the cylinder; 72. a second guide seat; 73. a third guide bar; 74. an adjusting plate; 75. a connecting plate; 8. a tension sensor; 9. a deceleration structure; 91. a worm; 92. a worm gear; 93. a first rotating shaft; 10. and (6) testing a sample piece.

Detailed Description

The first embodiment is as follows:

the present invention is described in detail with reference to the accompanying drawings, and as shown in fig. 1 and 6, the sliding friction force detection apparatus includes a frame 1, a driving device 2, a moving assembly 3, a pull rod 4, a friction sample plate 5 and a clamping unit 6, wherein the frame 1 is slidably provided with the pull rod 4, the pull rod 4 is fixed with the moving assembly 3, the moving assembly 3 is in transmission connection with the driving device 2, the frame 1 is provided with the friction sample plate 5, the two sides of the friction sample plate 5 are provided with the clamping unit 6, the clamping unit 6 is used for fixing a test sample 10, and a tension sensor 8 is fixed between the pull rod 4 and the friction sample plate 5; centre gripping unit 6 includes grip slipper 61 and compresses tightly subassembly 62, can dismantle on the grip slipper 61 and be connected with and compress tightly subassembly 62, it includes mount pad 621 and briquetting 622 to compress tightly subassembly 62, grip slipper 61 can dismantle and be connected with mount pad 621, mount pad 621 end fixing has briquetting 622, briquetting 622 set up in grip slipper 61 top, briquetting 622 is used for compressing tightly on experimental appearance 10 upper portion. Friction sample 5 and frame 1 slide and set up, place experimental sample 10 on the grip slipper 61, experimental sample 10 and friction sample 5 contact each other, briquetting 622 compresses tightly at experimental sample 10 top, at this moment, drive arrangement 2 drives pull rod 4 and removes along frame 1, pull rod 4 pulling friction sample 5 removes along frame 1, because friction sample 5 both sides are pressed from both sides tightly by experimental sample 10, the in-process of friction sample 5 and experimental relative motion, tension sensor 8 detects the sliding friction power of being tested experimental sample 10, output signal transmits and gives the controller. This embodiment further comprises a control unit, which may be a computer or other intelligent device. The control unit receives the tension value measured by the tension sensor 8. Typically, the test piece 10 is pulled to slide between the friction templates 5, and the measurement process has a tensile stroke of 40-50 mm.

As shown in fig. 2, fig. 4 and fig. 5, the clamping unit 6 further includes a fixing member 63, a first mounting hole 64 is disposed on the mounting seat 621, a second mounting hole 65 is disposed on the clamping seat 61, and the fixing member 63 passes through the first mounting hole 64 and the second mounting hole 65 and is in threaded connection with the clamping seat 61. The first mounting holes 64 are long holes, the second mounting holes 65 are round holes, the number of the second mounting holes 65 is at least two, the fixing piece 63 can be selectively matched with one of the second mounting holes 65, and the fixing piece 63 can be selectively matched with the mounting holes with different heights to adapt to the test sample pieces 10 with different heights. Two fixing members 63 may be provided to respectively fit into the two second mounting holes 65, the fixing members 63 may be selected from bolts, and the fixing members 63 are used to fix the mounting seat 621 and the clamping seat 61 together to ensure that the pressing block 622 presses on the surface of the test sample 10.

As shown in fig. 2 and 3, a deceleration structure 9 is provided between the driving device 2 and the moving assembly 3. The speed reducing structure 9 comprises a worm 91 and a worm wheel 92, the worm 91 is fixedly connected with the driving device 2, the worm 91 is meshed with the worm wheel 92, and a first rotating shaft 93 penetrates through the worm wheel 92. In this embodiment, the driving device 2 may be selected as an adjusting handwheel, or may be selected as an electrically driven driving device, and the like, because the driving speed of the driving device 2 is fast, if it is required that the relative movement speed between the friction sample and the test sample piece 10 is relatively stable and relatively slow, a speed reducing structure 9 for reducing the speed is provided between the driving device 2 and the moving assembly 3. In the present embodiment, the reduction gear mechanism 9 is selected as a worm and gear reduction gear mechanism 9.

The moving assembly 3 includes a first bevel gear 31, a second bevel gear 32, a positioning rod 33, a driving seat 34, a first guide rod 35, a second guide rod 36, a first guide seat 38 and a box body 37, the first rotating shaft 93 is sleeved with the first bevel gear 31, the first bevel gear 31 is engaged with the second bevel gear 32, the second bevel gear 32 is fixed with the positioning rod 33, the positioning rod 33 is inserted into the driving seat 34, the positioning rod 33 is fixedly connected with the driving seat 34, the first guide rod 35 and the second guide rod 36 are respectively fixed at two ends of the driving seat 34, the first guide rod 35 and the second guide rod 36 are respectively inserted into the first guide seat 38, the first guide rod 35 and the second guide rod 36 can move along the first guide seat 38 at different positions, the first guide seat 38 is fixed to the box body 37, the box body 37 is fixed to the rack 1, and the pull rod 4 is fixed to the first guide rod 35. After the driving device 2 drives the worm 91 to rotate, the worm gear 92 meshed with the worm 91 rotates immediately, the first rotating shaft 93 rotates simultaneously with the worm gear 92, the first bevel gear 31 sleeved on the first rotating shaft 93 rotates simultaneously with the first rotating shaft 93, the second bevel gear 32 rotates immediately due to the fact that the first bevel gear 31 is meshed with the second bevel gear 32, and in the process of rotating the second bevel gear 32, the positioning rod 33 continuously drives the driving seat 34 to move, so that the first guide rod 35 and the second guide rod 36 move along the first guide seat 38 and drive the pull rod 4 to do linear motion, and since the distance for the pull rod 4 to drive the friction sample plate 5 to do linear motion needs to be preset during a friction test, the moving component 3 in the form is arranged to drive the friction sample plate 5 to do linear motion, and drive the friction sample plate 5 to return to an original position after the motion reaches a preset distance.

As shown in fig. 7, the rack 1 is located at the fixing plate 11, the fixing plate 11 is provided with a plurality of T-shaped grooves 12, the fastening structure penetrates through the rack 1 and the T-shaped grooves 12 to fix the rack 1 at the fixing plate 11, the T-shaped grooves 12 are arranged to facilitate adjustment of the position of the rack 1, and meanwhile, a plurality of sets of sliding friction force detection tools can be arranged on the fixing plate 11.

The working principle is as follows:

in order to test the brake material and develop a novel brake device, the test sample pieces 10 are symmetrically arranged on two sides of the friction sample piece 5, the two test sample pieces 10 clamp the friction sample piece 5 in the middle, and the pressing force which is stable on the surface of the test sample piece 10 is acted by the pressing assembly 62. The driving device 2 is rotated, the pull rod 4 drives the tension sensor 8 and the friction sample plate 5 to move forwards, and in the relative movement process of the friction sample plate 5 and the test sample piece 10, the sliding friction force of the measured object is detected by monitoring the output signal of the tension sensor 8.

Example two:

different from the first embodiment, the installation form of the pressing assembly in the present embodiment is different, as shown in fig. 8 and fig. 9, the clamping unit 6 further includes a tensioning assembly 66, the first installation hole 64 and the second installation hole 65 are both long holes, the tensioning assembly 66 includes an adjusting rod 661, an elastic member 662 and a positioning member 663, the adjusting rod 661 is disposed through the installation seat 621 and extends into the first installation hole 64, two ends of the elastic member 662 are respectively fixed in the end portion of the adjusting rod 661 and the installation seat 621, and the positioning member 663 sequentially passes through the adjusting rod 661 and the clamping seat 61. Because the height of experimental sample 10 is different, for the all stable by briquetting 622 of adapting to the experimental sample 10 of co-altitude not compress tightly in grip slipper 61 department, be provided with tensioning assembly 66 and realize infinitely variable control, specifically, pulling adjusting rod 661 changes its length of stretching into in mount 621, wait briquetting 622 and experimental sample 10 after each other contact, wear to locate the hole on adjusting rod 661 with setting element 663 in, elastic component 662 keeps adjusting rod 661's position under the elastic action.

Example three:

the present embodiment is different from the first and second embodiments in that the sidewall of the test sample 10 can be compressed in this embodiment. As shown in fig. 10, the clamping seat 61 is provided with a position adjusting assembly 7 in a sliding manner, the position adjusting assembly 7 is fixed with a propulsion cylinder 71, the position adjusting assembly 7 comprises a second guide seat 72, a third guide rod 73 and an adjusting plate 74, the propulsion cylinder 71 is fixedly connected with a connecting plate 75, the connecting plate 75 is fixed with at least two third guide rods 73, the third guide rods 73 sequentially penetrate through the second guide seat 72 and the clamping seat 61, and one end of each third guide rod 73 extending into the clamping seat 61 is fixed with the adjusting plate 74. The end face of the test sample piece 10 is in contact with the friction sample plate 5, and the position of the test sample piece 10 in the clamping seat 61 is determined by the position adjusting assembly 7 aiming at test sample pieces 10 with different sizes, so that the test sample piece 10 is surrounded and contacted by the position adjusting assembly 7, the friction sample plate 5 and the pressing assembly 62 at the same time. The pushing cylinder 71 drives the connecting plate 75 to move, the connecting plate 75 and the third guide rod 73 move along the second guide seat 72, in the process, the position between the adjusting plate 74 and the clamping seat 61 is adjusted, and the adjusting plate 74 tightly presses the side wall of the test sample 10. In the embodiment, one propulsion cylinder 71 is selected to simultaneously realize the actions of the two groups of position adjusting assemblies 7, so that the travel distances of the two groups of position adjusting assemblies 7 are kept consistent. The third guide rod 73 has a certain length, the third guide rod 73 passes through the second guide seat 72, and the second guide seat 72 plays a guiding role.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims (8)

1. The sliding friction force detection equipment is characterized by comprising a rack (1), a driving device (2), a moving assembly (3), a pull rod (4), a friction sample plate (5) and a clamping unit (6), wherein the pull rod (4) is arranged on the rack (1) in a sliding manner, the moving assembly (3) is fixed on the pull rod (4), the moving assembly (3) is in transmission connection with the driving device (2), the friction sample plate (5) is erected on the rack (1), the clamping unit (6) is arranged on two sides of the friction sample plate (5), the clamping unit (6) is used for fixing a test sample piece (10), and a tension sensor (8) is fixed between the pull rod (4) and the friction sample plate (5);

centre gripping unit (6) include grip slipper (61) and compress tightly subassembly (62), can dismantle on grip slipper (61) and be connected with and compress tightly subassembly (62), compress tightly subassembly (62) including mount pad (621) and briquetting (622), grip slipper (61) can dismantle and be connected with mount pad (621), mount pad (621) end fixing has briquetting (622), briquetting (622) set up in grip slipper (61) top, briquetting (622) are used for compressing tightly on experimental sample spare (10) upper portion.

2. The sliding friction force detecting apparatus according to claim 1, wherein the clamping unit (6) further comprises a fixing member (63), the mounting seat (621) is provided with a first mounting hole (64), the clamping seat (61) is provided with a second mounting hole (65), and the fixing member (63) passes through the first mounting hole (64), is connected with the second mounting hole (65) and is in threaded connection with the clamping seat (61).

3. The sliding friction force detecting apparatus according to claim 2, wherein the first mounting hole (64) is a long hole, the second mounting hole (65) is a circular hole, and at least two of the second mounting holes (65) are provided, and the fixing member (63) is fitted to one of the second mounting holes (65).

4. Sliding friction force detection device according to claim 1, characterized in that a deceleration structure (9) is provided between the drive means (2) and the moving assembly (3).

5. The sliding friction force detection apparatus according to claim 4, wherein the deceleration structure (9) comprises a worm (91) and a worm wheel (92), the worm (91) is fixedly connected with the driving device (2), the worm (91) is engaged with the worm wheel (92), and a first rotating shaft (93) is arranged in the worm wheel (92) in a penetrating manner.

6. The sliding friction force detecting apparatus according to claim 5, wherein the moving assembly (3) comprises a first bevel gear (31), a second bevel gear (32), a positioning rod (33), a driving seat (34), a first guiding rod (35) and a second guiding rod (36), a first guiding seat (38) and a box body (37), the first rotating shaft (93) is sleeved with the first bevel gear (31), the first bevel gear (31) is engaged with the second bevel gear (32), the second bevel gear (32) is fixed with the positioning rod (33), the positioning rod (33) is inserted into the driving seat (34), two ends of the driving seat (34) are respectively fixed with the first guiding rod (35) and the second guiding rod (36), the first guiding rod (35) and the second guiding rod (36) are respectively inserted into the first guiding seat (38), the first guiding seat (38) is fixed to the box body (37), the box body (37) is fixed to the machine frame (1), and the first guiding rod (35) is fixed with the pull rod (4).

7. The sliding friction force detecting apparatus according to claim 2, wherein the clamping unit (6) further comprises a tensioning assembly (66), the first mounting hole (64) and the second mounting hole (65) are both long holes, the tensioning assembly (66) comprises an adjusting rod (661), an elastic member (662) and a positioning member (663), the adjusting rod (661) is disposed through the mounting seat (621) and extends into the first mounting hole (64), two ends of the elastic member (662) are respectively fixed at an end of the adjusting rod (661) and the mounting seat (621), and the positioning member (663) sequentially passes through the adjusting rod (661) and the clamping seat (61).

8. The sliding friction force detecting apparatus according to claim 7, wherein the clamping base (61) is slidably provided with a position adjusting assembly (7), a pushing cylinder (71) is fixed on the position adjusting assembly (7), the position adjusting assembly (7) comprises a second guide base (72), a third guide rod (73) and an adjusting plate (74), a connecting plate (75) is fixedly connected to the pushing cylinder (71), at least two third guide rods (73) are fixed on the connecting plate (75), the third guide rods (73) sequentially penetrate through the second guide base (72) and the clamping base (61), and the adjusting plate (74) is fixed at one end of each third guide rod (73) extending into the clamping base (61).

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