CN210269567U

CN210269567U - Pendulum type friction coefficient tester

Info

Publication number: CN210269567U
Application number: CN201920328959.6U
Authority: CN
Inventors: 张利勇; 张鹏; 刘蒙恩
Original assignee: Beijing Jinditong Testing Technology Co ltd
Current assignee: Beijing Jinditong Testing Technology Co ltd
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-04-07
Anticipated expiration: 2029-03-14

Abstract

The utility model relates to a pendulum-type coefficient of friction apparatus, the on-line screen storage device comprises a base, vertical stand of fixing on the base and through sliding sleeve and stand slip the registration subassembly and the pendulum subassembly that link to each other, the sliding sleeve suit is on the stand, the inside cavity of stand, the inside swivelling joint of stand has the lead screw with the coaxial setting of stand, the top of lead screw is exposed from the top of stand, the top of lead screw is fixed with the runner, the inside of stand is provided with the drive block that slides and link to each other with the stand, the lead screw runs through the drive block and links to each other with the drive block screw thread, the connecting rod through the lateral wall that runs through the stand between drive block and the sliding sleeve that is located the stand outside links to each other, set up the spout that supplies the connecting rod to pass the lateral. The utility model has the advantages of be convenient for adjust pendulum subassembly and registration subassembly height.

Description

Pendulum type friction coefficient tester

Technical Field

The utility model belongs to the technical field of the technique of measuring instrument and specifically relates to a pendulum-type coefficient of friction apparatus is related to.

Background

With the development of society, the antiskid problem of urban roads, sports grounds, airport runways and other road surfaces has attracted general attention of relevant parts. Especially, in the course of laying the plastic runway, the coefficient of friction value of the runway upper surface is directly related to the personal safety of the athlete using the runway, therefore, generally, after the plastic runway is laid, the coefficient of friction of its surface needs to be measured by using the pendulum type friction coefficient measuring instrument (called pendulum type instrument for short), and its main working principle is utilized: the potential energy loss of the pendulum is equal to the work done by the friction of the runway and the like when the rubber sheet arranged at the tail end of the swing arm slides across the runway.

Pendulum apparatus in the prior art comprises:

a base assembly: the leveling device consists of a T-shaped leg and a leveling screw, and is mainly used for leveling and supporting an instrument;

the stand subassembly: the device consists of an upright post, a lifting mechanism for driving the upright post to lift, a guide rod and an instrument handle, and is used for adjusting the hanging height of a swinging head;

the pendulum assembly: the device comprises a swinging head, a swinging rod and other connecting components, wherein a sliding block and a rubber sheet are arranged on the swinging head and are used for generating a measured value of the friction coefficient of the plastic track;

releasing the switch: the switch is arranged on a cantilever of the T-shaped leg and used for fixing or loosening the pendulum;

the number display system comprises: the indicating needle is in linkage connection with the pendulum assembly through a jackscrew and is used for indicating the swing height of the pendulum in a number indicating system.

When the pendulum type friction coefficient measuring instrument is actually operated, the pointer is zeroed during the first-step operation, the pendulum needs to be adjusted to a preset height at the moment, the pointer is rotated to a height position consistent with the pendulum, the pendulum is released at the moment to be formed into a free pendulum, the fastening handle is continuously adjusted to adjust the tightness degree of the pointer until the free pendulum stroke can just push the pointer to a zero value position.

The lifting mechanism of the existing pendulum type friction coefficient measuring instrument comprises a rack fixed on an upright post and a sliding sleeve connected with the upright post in a sliding manner, a gear meshed with the rack on the upright post is connected to the sliding sleeve in a rotating manner, a jackscrew for fixing the sliding sleeve on the upright post is further arranged on the sliding sleeve, when the height of a pendulum assembly is adjusted, the jackscrew is firstly loosened by one hand, the height of the sliding sleeve is adjusted by rotating the gear, so that the height of the pendulum assembly is adjusted, when the pendulum assembly is adjusted to a required position, the gear is controlled by one hand to be prevented from rotating, and the jackscrew is rotated by the other hand, so that the position of the sliding.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pendulum-type coefficient of friction apparatus, it has the advantage of being convenient for adjust pendulum subassembly and registration subassembly height.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a pendulum-type coefficient of friction apparatus, the on-line screen storage device comprises a base, vertical stand of fixing on the base and through sliding sleeve and stand slip continuous registration subassembly and pendulum subassembly, the sliding sleeve suit is on the stand, the inside cavity of stand, the inside swivelling joint of stand has the lead screw with the coaxial setting of stand, the top of lead screw is exposed from the top of stand, the top of lead screw is fixed with the runner, the inside of stand is provided with the drive block that slides continuous with the stand, the lead screw runs through the drive block and links to each other with the drive block screw thread, the drive block links to each other with the connecting rod that is located through the lateral wall that runs through the stand between the outside sliding sleeve of stand, set up the spout that supplies the connecting rod to pass the lateral wall of stand along the axial.

Through adopting above-mentioned technical scheme, when the height of pendulum subassembly and registration subassembly is adjusted to needs, only need one hand to rotate the runner, thereby it moves at the inside of stand to be located the inside lead screw of stand along with the rotation drive block of runner, the drive block drives the sliding sleeve in step and carries out the removal of vertical direction along the stand, thereby it carries out the removal of vertical direction to drive pendulum subassembly and registration subassembly, thereby be convenient for adjust the high position of pendulum subassembly and registration subassembly.

The utility model discloses further set up to: the surface of the driving block is provided with a ball in a rolling way.

Through adopting above-mentioned technical scheme, do benefit to and make the drive block remove in the inside of stand.

The utility model discloses further set up to: a level is arranged on the base.

Through adopting above-mentioned technical scheme, be convenient for look over the base and be in the horizontality.

The utility model discloses further set up to: the two connecting rods are respectively positioned at two opposite sides of the driving block.

Through adopting above-mentioned technical scheme, make the atress of sliding sleeve more even to it is more smooth and easy when making the sliding sleeve atress remove.

The utility model discloses further set up to: the top of stand is provided with the sleeve pipe, and sheathed tube hole and the one end diameter phase-match that the lead screw self-reliance post top exposes, thereby threaded connection has the jackscrew that stretches into in the sleeve pipe hole tightly fixed with the lead screw top on the sheathed tube lateral wall.

Through adopting above-mentioned technical scheme, avoid operating personnel mistake to bump to cause the rotation of lead screw.

The utility model discloses further set up to: the base is "T" shape, including horizontal pole and vertical pole, and the one end of vertical pole is provided with the slot, and the intermediate position department of the length direction of horizontal pole is provided with slot assorted inserted block, and the inserted block inserts in the slot.

Through adopting above-mentioned technical scheme, when packing up pendulum-type coefficient of friction apparatus, separate horizontal pole and vertical pole to practice thrift storage space, be convenient for to accomodating of pendulum-type coefficient of friction apparatus.

The utility model discloses further set up to: the upper surface of the longitudinal rod is provided with a square hole communicated with the slot, the position of the insert block opposite to the square hole is provided with a groove, a clamping block matched with the section of the square hole is arranged inside the groove, and an elastic piece for pushing the clamping block to stretch out from the groove so as to enable one end of the clamping block to be positioned in the groove and one end of the clamping block to stretch into the square hole is arranged in the groove.

Through adopting above-mentioned technical scheme, make when using, can not separate between vertical pole and the horizontal pole.

The utility model discloses further set up to: the end of the clamping block extending into the square hole is a conical head with a gradually reduced section.

Through adopting above-mentioned technical scheme, do benefit to the fixture block and stretch into the inside of quad slit.

The utility model discloses further set up to: the top and the below of drive block are provided with respectively with the lead screw cover at inside lead screw protective sheath, and the both ends of the lead screw protective sheath that is located the drive block below link to each other with the bottom of stand and the bottom fixed surface of drive block respectively, and the both ends of the lead screw protective sheath that is located the drive block top link to each other with the top of stand and the top fixed phase of drive block respectively.

Through adopting above-mentioned technical scheme, avoid the foreign matter to enter into the inside of stand through the spout on the stand to lead to the fact the influence to the lead screw.

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

1. when the positions of the pendulum assembly and the number indicating assembly need to be adjusted, the positions of the pendulum assembly and the number indicating assembly can be adjusted by only rotating the rotating wheel with one hand;

2. the base is composed of a detachable cross rod and a detachable longitudinal rod, so that when the pendulum-type friction coefficient tester is stored, the storage space is reduced, and the pendulum-type friction coefficient tester is convenient to store;

3. the screw is protected through the screw protective sleeve, so that the screw is prevented from being damaged when foreign matters enter the stand column.

Drawings

FIG. 1 is a schematic view of a pendulum-type friction coefficient measuring instrument;

FIG. 2 is a rear side view of the pendulum-type friction coefficient measuring device;

FIG. 3 is an exploded schematic view of the base;

fig. 4 is a schematic view of the internal structure of the pillar.

In the figure, 1, a base; 11. a cross bar; 111. inserting a block; 112. a groove; 12. a longitudinal bar; 121. a slot; 122. a square hole; 13. adjusting the bolt; 14. a level; 15. a clamping block; 16. an arc-shaped elastic sheet; 2. a column; 21. a chute; 22. a sleeve; 23. carrying out top thread; 3. a sliding sleeve; 4. a number display component; 41. a fan-shaped angle ruler; 42. a pointer; 5. a pendulum assembly; 51. a swing rod; 511. a linkage rod; 52. a head swing assembly; 6. a cross beam; 61. a release switch; 7. a lead screw; 71. a rotating wheel; 8. a drive block; 81. a ball bearing; 9. a connecting rod; 10. lead screw protective sheath.

Detailed Description

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

Referring to fig. 1 and 2, for the utility model discloses a pendulum type friction coefficient measuring instrument, including base 1, upright 2 fixed on base 1 vertically and through sliding sleeve 3 with upright 2 slip continuous registration subassembly 4 and pendulum subassembly 5. The sliding sleeve 3 is sleeved outside the upright post 2. The lateral wall of the sliding sleeve 3 is provided with a horizontal beam 6, and the middle position of the beam 6 in the length direction is fixedly connected with the sliding sleeve 3 in a welding way. The cross beam 6 and the upright post 2 form a cross structure.

The number indicating assembly 4 comprises a fan-shaped angle ruler 41 fixed below the cross beam 6 and positioned on one side of the upright post 2 and a pointer 42 with one end rotatably connected to the middle position of the length direction of the cross beam 6 through a rotating shaft. The surface of the fan-shaped angle gauge 41 is engraved with angle lines along the circumferential direction of the rotation shaft of the pointer 42. The pointer 42 rotates along the surface of the fan angle 41 and the pointer 42 is always in a parallel state with the surface of the fan angle 41 during the rotation.

The pendulum assembly 5 is located outside the base 1. The swing assembly 5 comprises a swing rod 51 with one end rotatably connected with the cross beam 6 through a rotating shaft and a swing head assembly 52 fixed on the other end of the swing rod 51. Wherein, the rotating shaft of the swing link 51 rotatably connected with the beam 6 and the rotating shaft of the pointer 42 rotatably connected with the beam 6 are the same rotating shaft. A linkage rod 511 extending towards the pointer direction is fixed on the swing rod 51, the length of the linkage rod 511 is longer than the distance between the swing rod 51 and the pointer 42, and the linkage rod 511 is fixedly connected with the swing rod 51.

A release switch 61 for fixing the swing rod and releasing the swing rod is fixed below one end, far away from the fan-shaped angle ruler 41, of the cross beam 6, when the friction coefficient of the ground is detected, the swing rod 51 is firstly fixed with the release switch 61, the pointer 42 rotates in the direction of the release switch 61, the pointer is enabled to abut against the direction of a linkage rod 511 on the swing rod 51, the release switch 61 is controlled to release the swing rod 51 to enable the swing rod 51 to fall freely, the swing rod 51 drives the pointer 42 to rotate in a synchronous phase fan-shaped angle ruler 41 square mode, and the pointer 42 is enabled to be opposite to a scale mark on the fan-shaped angle ruler 41.

Referring to fig. 3, the base 1 includes a "T" shaped seat formed by inserting the cross bar 11 and the longitudinal bar 12, an insertion block 111 integrally formed with the cross bar 11 is disposed on a side wall of the cross bar 11 at a middle position in a length direction of the cross bar 11, an insertion slot 121 matched with the insertion block 111 in shape is disposed at one end of the longitudinal bar 12, and the insertion block 111 is inserted into the insertion slot 121, so that the cross bar 11 and the longitudinal bar 12 are connected to form a "T" shaped structure. And adjusting bolts 13 vertically penetrating through the cross rod 11 or the longitudinal rod 12 are respectively arranged at two ends of the cross rod 11 and one end of the longitudinal rod 12 far away from the cross rod 11, and the adjusting bolts 13 are in threaded connection with the cross rod 11 or the longitudinal rod 12. By turning the adjusting bolt 13, the level of the base 1 is adjusted. In order to facilitate the inspection of whether the base 1 is in a horizontal state, a level 14 is fixed to the upper surface of the crossbar 11. The leveling device 14 makes it possible to visually see whether the base 1 is horizontal.

A square hole 122 communicating with the inside of the slot 121 is formed in the upper surface of the vertical rod 12. When the insert block 111 is inserted into the slot 121, a groove 112 is formed at a position of the insert block 111 opposite to the square hole 122, and the cross-sectional size of the groove 112 matches with the shape and size of the square hole 122. The latch 15 is inserted into the groove 112, and the thickness of the latch 15 is smaller than the depth of the groove 112. The sectional shape of the latch 15 matches the sectional shape of the groove 112. An arc-shaped elastic sheet 16 for pushing the fixture block 15 to enable the fixture block 15 to extend out of the notch of the groove 112 is arranged inside the groove 112, one end of the arc-shaped elastic sheet 16 is fixed at the bottom of the groove 112, and the other end of the arc-shaped elastic sheet is fixedly connected with the fixture block 15. The latch 15 is pushed by the arc-shaped elastic sheet 16 to extend out of the notch of the groove 112 and be snapped into the square hole 122, and when the latch 15 is snapped into the square hole 122, the end of the latch 15 connected with the arc-shaped elastic sheet 16 is located inside the groove 112.

When the transverse rod 11 and the longitudinal rod 12 need to be detached, the latch 15 in the square hole 122 is pressed to be retracted into the groove 112, so that the plug 111 can be pulled out of the slot 121. When the crossbar 11 and the side rail 12 are assembled, the insertion block 111 is inserted into the insertion slot 121, and at this time, when the groove 112 is opposite to the square hole 122, the elastic force of the arc-shaped elastic sheet 16 pushes the latch 15, so that the latch 15 extends into the square hole 122, thereby fixing the crossbar 11 and the side rail 12 together. In order to facilitate the fixture block 15 to extend into the square hole 122, one end of the square hole of the fixture block 15 is a conical head with a gradually decreasing cross section.

Referring to fig. 4, the upright 2 is a hollow tube with a bottom end welded and fixed to the cross bar 11. A screw 7 is rotatably connected to the inside of the column 2 and is coaxial with the column 2, and the top end of the screw 7 is exposed from the top end of the column 2. A rotating wheel 71 coaxial with the screw rod 7 is fixedly connected to the top end of the screw rod 7. The inside that is located stand 2 is provided with the driving block 8 that links to each other with stand 2 slip, and the lead screw 7 that is located the inside of stand 2 runs through driving block 8 and links to each other with the screw thread between the driving block 8. The both sides that the drive block 8 is relative are provided with the connecting rod 9 that runs through the lateral wall of stand 2 thereby link to each other with the sliding sleeve 3 that is located the stand 2 outside respectively, and the both ends of connecting rod 9 link to each other with drive block 8 and sliding sleeve 3 welded fastening respectively.

Offer on the lateral wall of stand 2 and supply connecting rod 9 to pass and make connecting rod 9 carry out the spout 21 that slides inside, the length direction of spout 21 sets up along the axial of stand 2. When the lead screw 7 rotates to drive the driving block 8 to move in the vertical direction in the upright post 2, the driving block 8 drives the sliding sleeve 3 to move on the upright post 2 through the connecting rod 9. Thereby adjusting the height of the dial assembly 4 and the pendulum assembly 5.

In order to facilitate the driving block 8 to move inside the upright 2, a plurality of balls 81 are mounted on the side wall of the driving block 8 facing the pipe wall of the upright 2 in a rolling manner, and the rolling balls 81 reduce the friction force between the upright 2 and the driving block 8, so that the driving block 8 can move more smoothly inside the upright 2.

Referring to fig. 2, in order to prevent an operator from accidentally touching the rotating wheel 71 during detection, and thus rotating the screw 7, the top end of the upright post 2 is provided with a sleeve 22 integrally formed with the upright post 2, and an inner hole of the sleeve 22 is matched with the diameter of one end of the screw 7 exposed from the top end of the upright post 2. The lateral wall of the sleeve 22 is provided with a threaded hole which is the same as the inner hole of the sleeve 22, a jackscrew 23 is connected in the threaded hole in a threaded manner, one end of the jackscrew 23 extends into the sleeve 22 through the threaded hole, and the other end of the jackscrew is positioned outside the sleeve 22. After the positions of the number indicating assembly 4 and the pendulum assembly 5 are adjusted, the jackscrew 23 is rotated, so that the jackscrew 23 extrudes the lead screw 7, and the lead screw 7 cannot rotate continuously.

Referring to fig. 4, since the sliding groove 21 is formed in the wall of the upright 2, in order to prevent foreign matters from entering the upright 2 and damaging the screw 7, screw protecting sleeves 10 for covering the screw 7 inside are respectively arranged above and below the driving block 8. The end of the screw rod protecting sleeve 10 located above the driving block 8 is fixedly connected with the bottom end of the upright post 2 and the bottom end of the driving block 8 respectively, and the two ends of the screw rod protecting sleeve 10 located above the driving block 8 are fixedly connected with the top end of the upright post 2 and the top end of the driving block 8 respectively. When the driving block 8 moves vertically in the upright 2, the lead screw protective sleeve 10 automatically adjusts the length of the lead screw protective sleeve along with the movement of the driving block 8, so that the lead screw 7 is always in a state of being sleeved in the lead screw protective sleeve 10.

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

1. The utility model provides a pendulum-type coefficient of friction apparatus, includes base (1), vertical stand (2) of fixing on base (1) and through sliding sleeve (3) with stand (2) slip continuous registration subassembly (4) and pendulum subassembly (5), sliding sleeve (3) suit is on stand (2), its characterized in that: the inner part of the upright post (2) is hollow, the inner part of the upright post (2) is rotatably connected with a screw rod (7) which is coaxial with the upright post (2), the top end of the lead screw (7) is exposed from the top end of the free-standing post (2), a rotating wheel (71) is fixed at the top end of the lead screw (7), a driving block (8) which is connected with the upright post (2) in a sliding way is arranged inside the upright post (2), the screw rod (7) penetrates through the driving block (8) and is in threaded connection with the driving block (8), the driving block (8) is connected with the sliding sleeve (3) positioned outside the upright post (2) through a connecting rod (9) penetrating through the side wall of the upright post (2), the side wall of the upright post (2) is provided with a sliding groove (21) which is formed along the axial direction of the upright post (2) and used for the connecting rod (9) to penetrate through the side wall of the upright post (2), and the connecting rod (9) is connected with the sliding groove (21) in a sliding manner.

2. The pendulum-type friction coefficient determinator according to claim 1, wherein: and the surface of the driving block (8) is provided with a ball (81) in a rolling way.

3. The pendulum-type friction coefficient determinator according to claim 1, wherein: a water level (14) is arranged on the base (1).

4. The pendulum-type friction coefficient determinator according to claim 1, wherein: the two connecting rods (9) are respectively positioned at two opposite sides of the driving block (8).

5. The pendulum-type friction coefficient determinator according to claim 1, wherein: the top of stand (2) is provided with sleeve pipe (22), the hole of sleeve pipe (22) with lead screw (7) self-reliance post (2) top one end diameter phase-match that exposes, thereby threaded connection has on the lateral wall of sleeve pipe (22) stretches into in sleeve pipe (22) hole and tightly fixes jackscrew (23) in lead screw (7) top.

6. The pendulum-type friction coefficient determinator according to claim 1, wherein: base (1) is "T" shape, including horizontal pole (11) and vertical pole (12), the one end of vertical pole (12) is provided with slot (121), the length direction's of horizontal pole (11) intermediate position department be provided with slot (121) assorted inserted block (111), inserted block (111) are inserted in slot (121).

7. The pendulum-type friction coefficient determinator according to claim 6, wherein: the upper surface of the vertical rod (12) is provided with a square hole (122) communicated with the slot (121), the position of the inserting block (111) opposite to the square hole (122) is provided with a groove (112), a clamping block (15) matched with the cross section of the square hole (122) is arranged inside the groove (112), and an elastic element for pushing the clamping block (15) to stretch out from the groove (112) so that one end of the clamping block (15) is located in the groove (112) and one end of the clamping block stretches into the square hole (122) is arranged in the groove (112).

8. The pendulum-type friction coefficient determinator according to claim 7, wherein: one end of the clamping block (15) extending into the square hole (122) is a conical head with a gradually reduced cross section.

9. The pendulum-type friction coefficient determinator according to claim 1, wherein: the top and the below of drive block (8) are provided with respectively and overlap lead screw protective sheath (10) at inside with lead screw (7), and the both ends of lead screw protective sheath (10) that are located drive block (8) below link to each other with the bottom of stand (2) and the bottom fixed surface of drive block (8) respectively, and the both ends of lead screw protective sheath (10) that are located drive block (8) top are fixed with the top of stand (2) and the top of drive block (8) respectively and are linked to each other.