CN209802949U - Pendulum type friction coefficient tester - Google Patents

Abstract

The utility model discloses a pendulum-type coefficient of friction apparatus, relate to road supervision check out test set's technical field, it includes the base of "T" font, the one end of base minor face is rotated and is connected with the landing leg, the equal screw thread of one end that the base was kept away from to the both ends on base long limit and landing leg wears to be equipped with adjusting bolt, fine setting bolt is worn to be equipped with by adjusting bolt middle part coaxial thread, the up end at base middle part is fixed with support and air level, it is provided with the pillar to go up and down in the support, one side that the landing leg was kept away from to the pillar is fixed with the scale plate, the pillar still rotates in the fixed point department of scale plate and is connected with balance and pointer, the pillar is close to the one end perisporium of support and is provided with along its axial rack, the support up end is fixed with the control box. The utility model discloses a gear with rack toothing has realized the rack to yaw height and the effect of precision fine setting with the fine setting bolt.

Description

Pendulum type friction coefficient tester

Technical Field

The utility model belongs to the technical field of the technique of road supervision check out test set and specifically relates to a pendulum-type coefficient of friction apparatus is related to.

Background

With the development of transportation industry, the antiskid problem of roads, urban roads, airport runways and other roads has attracted the general attention of relevant departments. The pendulum type friction coefficient measuring instrument is an instrument for measuring the friction coefficient of a road surface, an airport runway, marking paint and the like, and can also be used as one of the bases for determining the formula of a tire to be protected by measuring the friction coefficient of a typical road surface. The instrument is convenient to debug and simple to operate, has small influence on traffic during testing, has stable data, and can be used indoors and outdoors. The pendulum type friction coefficient measuring instrument is a dynamic pendulum impact type instrument which is developed according to the basic principle that the potential energy loss of a pendulum is equal to the work done by a rubber sheet arranged at the tail end of a pendulum head when the rubber sheet slides over a road surface and overcomes the friction of the road surface and the like, and the main components of the pendulum type friction coefficient measuring instrument comprise a support, an upright post, a release switch, the pendulum head, a number indicating system and a pendulum rod.

chinese patent with patent publication number CN208399349U, a pendulum-type friction coefficient tester is proposed, comprising a base plate, the top fixedly connected with fixed plate of bottom plate, the top fixedly connected with handle of fixed plate, the fan-shaped scale plate of positive fixedly connected with of fixed plate, the front of fan-shaped scale plate is rotated and is connected with flexible piece, flexible groove has been seted up to the inside of flexible piece, sliding connection has the sliding plate between the both sides of flexible inslot wall, the top fixedly connected with extrusion piece of sliding plate, the extrusion groove has been seted up to the inside of extrusion piece, the equal sliding connection has the sliding block in top and the bottom of extrusion inslot wall. The utility model discloses an utilize the motion of fixture block, the height of regulation coefficient of friction apparatus that can be fine, it is convenient to adjust, labour saving and time saving to satisfy the detection use of not co-altitude position and different materials, and the stability after adjusting is very good, has improved the practicality of pendulum-type coefficient of friction apparatus.

The above prior art solutions have the following drawbacks: when the height adjustment of the swinging head is carried out according to the arc-shaped track of the swinging head swing, the sliding length of the rubber sheet on the swinging head when contacting the ground is required to be 126mm, the height precision of the swinging head is adjusted through the fixture block, and the precision requirement of the height fine adjustment of the swinging head is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a but the higher pendulum-type coefficient of friction apparatus of coarse adjustment fine setting and precision simultaneously.

The utility model aims at realizing through the following technical scheme:

A pendulum-type friction coefficient tester comprises a T-shaped base, wherein one end of the short side of the base is rotatably connected with a supporting leg, adjusting bolts are threaded through both ends of the long side of the base and one end of the supporting leg far away from the base, a fine adjustment bolt is arranged in the middle of the adjusting bolt in a penetrating way through a coaxial thread, a support and a level bubble are fixed on the upper end surface of the middle of the base, a support is arranged in the support in a lifting way, a scale plate is fixed on one side of the support far away from the support leg, the fixed point of the support column on the scale plate is also rotationally connected with a swinging head and a pointer, the peripheral wall of one end of the support column close to the support is provided with a rack along the axial direction thereof, the gear rack locking device is characterized in that a control box is fixed on the upper end face of the support, a gear meshed with the gear rack is rotatably connected in the control box, and a locking device used for locking the gear rack is further arranged in the control box.

By adopting the technical scheme, when the tester is taken out, the supporting legs are turned over, the tester is placed on the ground to be tested, and the supporting legs which are rotatably arranged are convenient for the storage of the tester; adjusting a plurality of adjusting bolts according to the horizontal calibration of the level bubble to enable the base to be horizontal, when the distance between the swing head and the ground needs to be adjusted, firstly releasing the locking of the locking device on the rack, then rotating the gear to enable the support to ascend or descend, and driving the swing head to ascend or descend when the support ascends or descends to realize the coarse adjustment of the height of the swing head; when the sliding length of the rubber sheet on the swinging head contacting with the ground is calibrated, the fine adjustment bolt can be respectively adjusted to enable the base to drive the swinging head to ascend or descend, fine adjustment of the swinging head is achieved, meanwhile, the fine adjustment bolt has a smaller thread pitch, and the adjustment precision is more precise.

The utility model discloses further set up to: the locking device comprises a latch which is elastically connected to the inner wall of one side of the control box and is arranged along the length direction of the rack, and when the latch is meshed with the rack properly, the gear is arranged on one side, away from the elastic connecting part of the latch and the inner wall of the control box, of the latch.

By adopting the technical scheme, when the locking of the locking device on the rack needs to be released, the gear is pressed to enable the gear to push the latch to move towards one side close to the inner wall of the control box, until the latch is disengaged from the rack, the gear is engaged with the rack, and at the moment, the gear is rotated to drive the rack engaged with the gear to ascend or descend, so that the ascending or descending of the strut is realized; after the height adjustment of the support is completed, the pressing of the gear is stopped, the elastically arranged clamping teeth are reset to be meshed with the rack, the rack is locked, and the position of the support is fixed at the moment.

the utility model discloses further set up to: the gear is coaxially fixed with a rotating shaft penetrating through the control box, and the end part of the rotating shaft far away from the gear is fixed with a hand wheel.

Through adopting above-mentioned technical scheme, rotatory hand wheel drives the pivot rotation, can drive gear revolve when the pivot is rotatory, has realized the convenient adjustment of pillar height.

The utility model discloses further set up to: a plurality of first elastic pieces are fixed between the latch and the inner wall of the control box.

Through adopting above-mentioned technical scheme, when pressing down the hand wheel and driving the gear and press the latch, the elastic component is compressed and produces deformation, and the latch has been removed the locking to the rack, when stopping pressing down the hand wheel, and the elastic component drive latch after the deformation kick-backs and carries out the locking to the rack, has realized the automatic locking function of locking means to the rack.

The utility model discloses further set up to: the lower end part of the fine adjustment bolt is in threaded connection with a bearing seat.

Through adopting above-mentioned technical scheme, the bearing seat has increased the area of contact of fine setting bolt and ground, prevents that the fine setting bolt that the diameter is too little from inserting the levelness that ground influences the base.

The utility model discloses further set up to: the peripheral wall of the upper end part of the adjusting bolt is coaxially fixed with a turntable, and the upper end part of the fine adjusting bolt is fixed with a knob.

through adopting above-mentioned technical scheme, rotatory carousel can realize adjusting bolt's rotation, and rotatory knob can realize finely tuning bolt's rotation, and is more convenient when carrying out height adjustment to the apparatus.

The utility model discloses further set up to: the base is close to the bull stick is worn to be equipped with to the one end of landing leg, the landing leg cover establish on the bull stick and with the base rotates to be connected, the base is close to the one end elasticity of landing leg is provided with the ball, the landing leg is close to the middle part of the one end of base seted up with the ball groove of ball grafting adaptation.

Through adopting above-mentioned technical scheme, the landing leg passes through the bull stick and rotates on the base, and when the landing leg rotated to perpendicular with the base, the ball that elasticity set up popped out to the adaptation of pegging graft with the pearl groove, and the landing leg was fixed on the base this moment for the landing leg is more stable to the support of base, breaks off with the fingers and thumb the ball that the landing leg made elasticity set up and breaks away from grafting with the pearl groove when needing to pack up the landing leg, but the landing leg free rotation this moment.

The utility model discloses further set up to: a groove is formed in one end, close to the supporting leg, of the base, and a second elastic piece is fixedly connected between the bottom wall of the groove and the ball.

By adopting the technical scheme, when the supporting leg rotates on the support, the ball is pressed into the groove, the second elastic piece is compressed to generate deformation, when the supporting leg rotates to the position that the ball groove corresponds to the ball, the deformed second elastic piece drives the ball to move to be in splicing fit with the ball groove, and at the moment, the supporting leg is fixed; the support leg is rotated continuously, the ball is pressed into the groove, and the support leg can rotate freely.

to sum up, the utility model discloses a beneficial technological effect does:

1. The fine adjustment bolt with the thread penetrating through the adjusting bolt has a smaller thread pitch, and the height precision of the swing head is adjusted through the fine adjustment bolt;

2. The clamping teeth which are meshed and matched with the racks and are elastically arranged in the control box realize the automatic locking function of the racks, and the adjustment of the head swing height is more convenient and fast;

3. The landing leg that rotates the setting passes through the ball that elasticity set up and fixes on the base with the grafting adaptation in ball groove for the support of base to the yaw is more stable.

drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic illustration of a partially exploded structure of the strut, the support, the rack, the pinion, the control box and the locking device;

fig. 4 is a partially enlarged schematic view of a portion B in fig. 2.

Reference numerals: 1. a base; 2. a support leg; 3. adjusting the bolt; 4. fine-tuning the bolt; 5. a support; 6. a level bubble; 7. a pillar; 8. a scale plate; 9. swinging the head; 10. a pointer; 11. a rack; 12. a control box; 13. a gear; 14. clamping teeth; 15. a rotating shaft; 16. a hand wheel; 17. a first elastic member; 18. a pressure bearing seat; 19. a turntable; 20. a knob; 21. a rotating rod; 22. a ball bearing; 23. a bead groove; 24. a groove; 25. a second elastic member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 4, for the utility model discloses a pendulum type friction coefficient tester, including the base 1 of "T" font, the bull stick 21 is worn to be equipped with by the one end of base 1 minor face, the cover is equipped with the landing leg 2 of being connected with base 1 rotation on the bull stick 21, the base 1 is close to the one end middle part of landing leg 2 and has seted up the recess 24, the elasticity is provided with the ball 22 in the recess 24, fixedly connected with second elastic component 25 between recess 24 diapire and ball 22, second elastic component 25 is preferably the spring, the landing leg 2 is close to the middle part of the one end of base 1 and has seted up the ball groove 23 of pegging graft adaptation with ball 22; adjusting bolt 3 is worn to be equipped with by the equal vertical screw thread of base 1's one end is kept away from to the both ends on the long limit of base 1 and landing leg 2, fine setting bolt 4 is worn to be equipped with by the coaxial screw thread in the middle part of adjusting bolt 3, the up end at base 1 middle part is fixed with air level 6, the lower tip threaded connection of fine setting bolt 4 has the pressure-bearing seat 18 of loudspeaker form, the coaxial carousel 19 that is fixed with of upper end perisporium of adjusting bolt 3, fine setting bolt 4's upper end is fixed with knob 20.

When taking out the apparatus, upset landing leg 2, landing leg 2 passes through bull stick 21 when rotating on base 1, ball 22 is impressed in the recess 24, second elastic component 25 is compressed and is produced deformation, when landing leg 2 rotates to ball groove 23 and ball 22 and corresponds, the second elastic component 25 drive ball 22 of deformation removes to and pegs graft the adaptation with ball groove 23, landing leg 2 is fixed at the state of perpendicular to base 1 this moment, make landing leg 2 more stable to the support of base 1, break off the ball 22 that landing leg 2 made elasticity set up with the help of fingers and thumb when needing to pack up landing leg 2 and break away from grafting with ball groove 23, landing leg 2 can free rotation this moment, the accepting of the apparatus of being convenient for of landing leg 2 of rotatable setting.

The rotating disc 19 or the knob 20 on the base 1 and the supporting leg 2 are respectively rotated to drive the adjusting bolt 3 or the fine adjustment bolt 4 to rotate, the levelness of the base 1 is calibrated by observing the air level 6, and the rotating disc 19 and the knob 20 realize convenient rotation of the adjusting bolt 3 and the fine adjustment bolt 4; the bearing seat 18 at the end part of the fine adjustment bolt 4 increases the contact area of the fine adjustment bolt 4 and the ground, prevents the fine adjustment bolt 4 with too small diameter from being inserted into the ground to influence the levelness of the base 1, and meanwhile, the fine adjustment bolt 4 has smaller thread pitch and is more accurate when adjusting the levelness.

Referring to fig. 2 and 3, a cylindrical support 5 is vertically fixed on the upper end surface of the middle part of the base 1, a pillar 7 is arranged in the support 5 in a lifting manner, a scale plate 8 is fixed on one side of the pillar 7 away from the supporting leg 2, a swinging head 9 (shown in fig. 1) and a pointer 10 are further rotatably connected to the fixing point of the scale plate 8 of the pillar 7, a rack 11 along the axial direction of the pillar 7 is arranged on the peripheral wall of one end of the pillar 7 close to the support 5, a control box 12 is fixed on the upper end surface of the support 5, a gear 13 meshed and matched with the rack 11 is rotatably connected in the control box 12, and a locking device for locking the rack 11 is further arranged.

The gear 13 is rotated, the gear 13 drives the rack 11 meshed with the gear to move up and down when rotating, the rack 11 drives the strut 7 to move up and down in the support 5 when moving, the position of the strut 7 in the support 5 is adjusted to realize the initial adjustment of the distance between the swing head 9 and the ground, and after the adjustment of the strut 7 is finished, the locking device locks the rack 11 and fixes the strut 7 on the support 5; according to the slip length of the sheet rubber on the balance 9 when contacting ground when balance 9 swings and the slip length contrast of 126mm in the operating specification, rotatory knob 20 that corresponds drives the fine setting screw rod and rotates, highly finely tunes balance 9, and the high accuracy adjustment of balance 9 height has been realized to the less pitch of fine setting screw rod, still need constantly observe air level 6 in order to guarantee the levelness of base 1 when finely tuning balance 9 height through the fine setting screw rod. After the height adjustment of the swing head 9 is completed, the friction coefficient of the ground to be detected can be detected.

The locking device comprises a latch 14 which is elastically connected to the inner wall of one side of the control box 12 and extends along the length direction of the rack 11, a plurality of first elastic pieces 17 are fixed between the latch 14 and the inner wall of the control box 12, the first elastic pieces 17 are preferably springs and are arranged at four corners of the four parallel latches 14, under the condition of no external force interference, the first elastic pieces 17 are in an initial state, the latches 14 are meshed with the rack 11, the gear 13 is located on one side, away from the elastic connecting portion between the latch 14 and the inner wall of the control box 12, a rotating shaft 15 which penetrates through the control box 12 is coaxially fixed on the gear 13, and a hand wheel 16 is fixed at the end, away from the gear 13, of the rotating shaft 15.

Under normal conditions, the latch 14 is meshed with the rack 11, at the moment, the locking device locks the rack 11, and the strut 7 is fixed in the support 5; when the position of the support post 7 in the support 5 needs to be adjusted, the hand wheel 16 is pressed to drive the gear 13 to push the rack 11 to move towards one side close to the inner wall of the control box 12, the first elastic piece 17 is compressed to generate deformation, the latch 14 is disengaged from the rack 11, meanwhile, the gear 13 is engaged with the rack 11, and at the moment, the gear 13 is rotated to realize the position adjustment of the support post 7; when the hand wheel 16 stops being pressed, the deformed first elastic piece 17 drives the latch 14 to move towards the direction close to the gear 13, the fine adjustment gear 13 is gradually stopped from being pressed so that the rack 11 is synchronously meshed with the gear 13 and the latch 14, then the hand wheel 16 is completely stopped from being pressed, and the latch 14 rebounds under the driving of the first elastic piece 17 and is completely meshed with the rack 11, so that the automatic locking function of the locking device on the rack 11 is realized.

The implementation principle of the embodiment is as follows:

Upset landing leg 2, make ball 22 and the adaptation of pegging graft of ball groove 23, place the apparatus and wait to detect the road surface, it makes base 1 reach the horizontality to observe 6 rotatory adjusting bolt 3 of air level, the distance of swing 9 calibration swing 9 and ground, the locking of latch 14 to rack 11 is relieved to pressing hand wheel 16, rotatory hand wheel 16 drives pillar 7 along with it and goes up and down in order to realize the coarse adjustment to swing 9 height, rotatory fine setting bolt 4 observes air level 6 simultaneously when needing the accurate adjustment, keep highly finely tuning to swing 9 under the horizontally condition guaranteeing base 1, 4 screw pitches of fine setting bolt are littleer simultaneously, precision is higher.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. A pendulum type friction coefficient measuring instrument is characterized in that: the support comprises a T-shaped base (1), wherein one end of the short side of the base (1) is rotatably connected with a supporting leg (2), two ends of the long side of the base (1) and one end, far away from the base (1), of the supporting leg (2) are provided with an adjusting bolt (3) in a threaded manner, a fine adjusting bolt (4) is arranged in the middle of the adjusting bolt (3) in a threaded manner, a support (5) and a level bubble (6) are fixed on the upper end face of the middle of the base (1), a support pillar (7) is arranged in the support pillar (5) in a lifting manner, a scale plate (8) is fixed on one side, far away from the supporting leg (2), of the support pillar (7) is further rotatably connected with a swinging head (9) and a pointer (10) at the fixed point of the scale plate (8), a rack (11) along the axial direction of the support pillar (5) is arranged on the peripheral, the support (5) up end is fixed with control box (12), control box (12) internal rotation be connected with gear (13) of rack (11) meshing adaptation, still be provided with in control box (12) and be used for the locking means of rack (11).

2. The pendulum-type friction coefficient determinator according to claim 1, wherein: the locking device comprises a latch (14) which is elastically connected to the inner wall of one side of the control box (12) and is arranged along the length direction of the rack (11), and when the latch (14) is meshed with the rack (11) properly, the gear (13) is positioned on one side, away from the latch (14), of the elastic connection part of the inner wall of the control box (12).

3. The pendulum-type friction coefficient determinator according to claim 2, wherein: a rotating shaft (15) penetrating through the control box (12) is coaxially fixed on the gear (13), and a hand wheel (16) is fixed at the end part of the rotating shaft (15) far away from the gear (13).

4. the pendulum-type friction coefficient determinator according to claim 3, wherein: a plurality of first elastic pieces (17) are fixed between the latch (14) and the inner wall of the control box (12).

5. The pendulum-type friction coefficient determinator according to claim 1, wherein: the lower end part of the fine adjustment bolt (4) is in threaded connection with a bearing seat (18).

6. The pendulum-type friction coefficient determinator according to claim 5, wherein: the peripheral wall of the upper end part of the adjusting bolt (3) is coaxially fixed with a rotary disc (19), and the upper end part of the fine adjusting bolt (4) is fixed with a knob (20).

7. The pendulum-type friction coefficient determinator according to claim 1, wherein: base (1) is close to bull stick (21) are worn to be equipped with to the one end of landing leg (2), landing leg (2) cover is established on bull stick (21) and with base (1) rotates and is connected, base (1) is close to the one end elasticity of landing leg (2) is provided with ball (22), landing leg (2) are close to the middle part of the one end of base (1) seted up with ball groove (23) of ball (22) grafting adaptation.

8. the pendulum-type friction coefficient determinator according to claim 7, wherein: a groove (24) is formed in one end, close to the supporting leg (2), of the base (1), and a second elastic piece (25) is fixedly connected between the bottom wall of the groove (24) and the ball (22).