阅读说明：本技术 一种轨道反压轮装置 (Track reverse pressing wheel device ) 是由 张恒山 王贇 于 2020-06-17 设计创作，主要内容包括：本发明涉及一种轨道反压轮装置,它包括夹紧支块、轴承轴、反压轮、压缩弹簧、连接螺栓,夹紧支块中间开有轴向通孔,夹紧支块上端设计有上通孔,夹紧支块下端设计有下通孔,夹紧支块上端通过轴承轴旋转安装有反压轮,夹紧支块设计有两个,两个夹紧支块交叉安装且两个夹紧支块中间通过转轴贯穿轴向通孔进行旋转连接,连接螺栓从一侧依次贯穿两个夹紧支块的下通孔以及压缩弹簧且连接螺栓贯穿后的端部通过螺母锁紧。优点是设计简单,使用方便,通过调节压缩弹簧的张力大小调节两夹紧支块的相应夹角,从而调整反压轮与工字型轨道的受力大小,保护小车在起吊重物时不至于溜车发生危险。(The invention relates to a track back pressure wheel device which comprises two clamping support blocks, a bearing shaft, a back pressure wheel, a compression spring and a connecting bolt, wherein an axial through hole is formed in the middle of each clamping support block, an upper through hole is formed in the upper end of each clamping support block, a lower through hole is formed in the lower end of each clamping support block, the back pressure wheel is rotatably mounted at the upper end of each clamping support block through the bearing shaft, the two clamping support blocks are arranged in a crossed mode, the middle of each clamping support block penetrates through the axial through hole through a rotating shaft to be rotatably connected, the connecting bolt sequentially penetrates through the lower through holes of the two clamping support blocks and the compression spring from one side, and the penetrating end part of the connecting bolt is. The advantage is that the design is simple, and convenient to use adjusts the corresponding contained angle that two press from both sides tight piece through the tension size of adjusting compression spring to the atress size of adjustment reverse pressure wheel and I shape track, the protection dolly is unlikely to the swift current car when lifting by crane the heavy object and takes place danger.)

1. A track reverse pressing wheel device is characterized by comprising two clamping supporting blocks, a bearing shaft, a reverse pressing wheel, a compression spring and a connecting bolt, wherein an axial through hole is formed in the middle of each clamping supporting block; the rotating shaft is arranged on the travelling crane trolley and is positioned below the I-shaped rail, and the back pressure wheel is pressed below the lower flange of the I-shaped rail.

2. The track reverse-pressing wheel device as claimed in claim 1, wherein the clamping support block comprises a middle cylinder, an upper end plate, an L-shaped plate and a reinforcing plate, an axial through hole is formed in the middle of the middle cylinder, the upper end plate is arranged above the middle cylinder, the L-shaped plate is obliquely arranged below the middle cylinder, the reinforcing plate is arranged on the outer side of the L-shaped plate, and the upper end of the reinforcing plate is connected below the middle cylinder; a lower through hole is designed at the position, close to the inner side, of the lower end of the L-shaped plate, the upper through hole and the axial through hole are in the same direction, one end of the bearing shaft is installed in the upper through hole, and the other end of the bearing shaft is rotatably installed in the reverse pressing wheel through a bearing.

3. The track press wheel device according to claim 2, wherein the lower through holes are perpendicular to the axial through holes, and the lower through holes are obliquely formed at the lower end of the L-shaped plate.

4. The track press wheel assembly of claim 2, wherein the two clamping supports are mounted in a cross-over manner, and the travel paths of the two press wheels are coincident.

5. The track pressure wheel device of claim 2, wherein the lower end of the upper plate is connected to the upper semicircle of the middle cylinder and the inner side of the middle cylinder protrudes out of the upper plate to form a circular boss, the upper end of the L-shaped plate is connected to the middle of the lower part of the circular boss, the upper end of the reinforcing plate is connected to the half of the lower semicircle of the lower end of the middle cylinder and the lower semicircle of the lower end of the middle cylinder is the lower semicircle close to the inclined side of the L-shaped plate.

6. The track reverse-pressing wheel device as claimed in claim 2, wherein the rotating shaft is a bearing shaft of the traveling crane trolley, two ends of the bearing shaft are respectively connected with the lower ends of the traveling mechanisms on two sides of the traveling crane trolley, the upper end of the electric block is rotatably fixed in the middle of the bearing shaft, the track reverse-pressing wheel device is mounted on the bearing shaft between the upper end of the electric block and the lower end of the traveling mechanism, the two clamping support blocks are crossed and rotatably mounted on the bearing shaft through axial through holes, and the pretightening force of the compression spring is adjusted through the connecting bolt and the nut, so that the two reverse-pressing wheels are pressed below the lower flange of the I-shaped track.

7. The track press wheel assembly of claim 2, wherein the track press wheel assembly is designed in one or two sets.

8. The track press wheel assembly as claimed in claim 1 or 2, wherein the clamping pads are integrally forged or cast from an aluminum alloy material.

9. An orbital reaction wheel assembly as set forth in claim 1 or 2 wherein said reaction wheel is of nylon material.

10. The track reverse-pressing wheel device according to claim 9, wherein a bearing hole is opened in the middle of the reverse-pressing wheel, a snap spring groove is further designed in the position close to the opening in the bearing hole, the bearing is installed in the bearing hole and clamped outside the outer ring of the bearing through the snap spring and located in the snap spring groove, the bearing shaft comprises a left end shaft, a right end shaft and a middle protrusion, a screw hole is designed in the end portion of the left end shaft, a ring of annular clamping groove is designed in the position close to the end portion of the right end shaft, the left end of the middle protrusion is connected with the left end shaft, the right end of the middle protrusion is connected with the right end shaft, the right end shaft is installed in the inner ring of the bearing and extends out of the inner ring of the bearing, the snap spring is clamped in the annular clamping groove of the right end shaft and is blocked outside the inner ring, the inner side of the inner ring leans.

Technical Field

The invention relates to a track reverse pressure wheel device, in particular to a track reverse pressure wheel device of an electric chain hoist trolley of a cantilever crane.

Background

The cantilever crane is a small and medium-sized hoisting device developed in recent years, has the characteristics of unique structure, safety, reliability, high efficiency, energy conservation, easiness in operation and maintenance and the like, and shows superiority in short distance, frequent use and intensive dispatching occasions compared with other conventional hoisting equipment. The electric hoist is connected to the swing arm through the traveling crane trolley to linearly move left and right and lift heavy objects. However, the swing arm is warped upwards or disturbed too much, and the operator is not required to operate the swing arm in a standard manner, so that the swing arm is easy to slide when lifting heavy objects, and the person and property are injured. There is a great potential safety hazard.

At present, the trolley is also hung on the market to improve the anti-sliding effect, and some brake structures are added, so that the structure is relatively complex in action, inconvenient to operate and difficult to maintain.

Disclosure of Invention

In order to solve the technical problems, the invention provides a track reverse pressing wheel device which is simple in design and convenient to use, and the corresponding included angle of two clamping support blocks is adjusted by adjusting the tension of a compression spring, so that the stress of the reverse pressing wheel and an I-shaped track is adjusted, and the danger of sliding of a trolley when heavy objects are lifted is avoided.

A track reverse pressing wheel device comprises clamping support blocks, a bearing shaft, a reverse pressing wheel, compression springs and connecting bolts, wherein an axial through hole is formed in the middle of each clamping support block, an upper through hole is formed in the upper end of each clamping support block, a lower through hole is formed in the lower end of each clamping support block, the reverse pressing wheel is rotatably mounted at the upper end of each clamping support block through the bearing shaft, the two clamping support blocks are arranged in a crossed mode, the middle of each clamping support block penetrates through the axial through hole through a rotating shaft to be rotatably connected, each connecting bolt sequentially penetrates through the lower through holes of the two clamping support blocks and the compression springs from one side, and the penetrating end portions of the connecting bolts are locked through nuts; the rotating shaft is arranged on the travelling crane trolley and is positioned below the I-shaped rail, and the back pressure wheel is pressed below the lower flange of the I-shaped rail.

The clamping support block comprises a middle cylinder, an upper end plate, an L-shaped plate and a reinforcing plate, wherein an axial through hole is formed in the middle of the middle cylinder, the upper end plate is arranged above the middle cylinder, the L-shaped plate is obliquely arranged below the middle cylinder, the reinforcing plate is arranged on the outer side of the L-shaped plate, and the upper end of the reinforcing plate is connected below the middle cylinder; a lower through hole is designed at the position, close to the inner side, of the lower end of the L-shaped plate, the upper through hole and the axial through hole are in the same direction, one end of the bearing shaft is installed in the upper through hole, and the other end of the bearing shaft is rotatably installed in the reverse pressing wheel through a bearing.

The lower through hole is vertical to the axial through hole, and the lower through hole is obliquely designed at the lower end of the L-shaped plate.

The two clamping support blocks are oppositely and crossly arranged, and the traveling paths of the two reverse pressing wheels are overlapped.

The upper end plate lower extreme be connected with middle cylindrical last semicircle and middle cylindrical inboard protrusion upper end plate, form circular boss, L template upper end is connected in the middle of circular boss below, reinforcing plate upper end is connected with middle cylindrical lower extreme semicircle half down and middle cylindrical lower extreme semicircle is the lower semicircle that is close to L template slope side.

The rotating shaft is a bearing shaft of the traveling crane trolley, two ends of the bearing shaft are respectively connected with the lower ends of the traveling mechanisms on two sides of the traveling crane trolley, the upper end of the electric hoist can be rotatably fixed in the middle of the bearing shaft, the track reverse pressing wheel device is installed on the bearing shaft between the upper end of the electric hoist and the lower end of the traveling mechanism, the two clamping support blocks are crossed and can be rotatably installed on the bearing shaft through an axial through hole, and the pretightening force of the compression spring is adjusted through the connecting bolt and the nut, so that the two reverse pressing wheels are pressed below a lower flange of the I-shaped track.

One or two groups of track reverse-pressing wheel devices are designed.

The clamping support block is integrally forged or cast and molded by adopting an aluminum alloy material.

The reverse pressure wheel is made of nylon materials.

Open in the middle of the reverse pressure wheel has the dead eye, and it has the jump ring groove still to design near oral area position in the dead eye, and the bearing is installed in the dead eye and is located the jump ring inslot in the outer lane outside of bearing through the jump ring card, the dead axle includes left end axle, right-hand member axle and middle arch, and left end axle end design has the screw hole, and right-hand member axle is close to end position design and has a round ring groove, and left end axle and right-hand member connection right-hand member axle are connected to middle protruding left end, and right-hand member axle is installed in the bearing inner circle and is stretched out behind the inner circle of bearing, and the jump ring card is blocked in the ring groove of right-hand member axle and the jump ring keeps off in the inner circle outside, and the inner circle inboard leans on middle arch, and left end.

The invention has the advantages that the design is simple, the use is convenient, and the corresponding included angle of the two clamping support blocks is adjusted by adjusting the tension of the compression spring, so that the stress of the reverse pressing wheel and the I-shaped track is adjusted, and the danger of sliding of the trolley when the trolley lifts a heavy object is avoided; when the compression spring is tightened, the stress surface of the lower flange of the I-shaped track can be enlarged, and the lower flange of the track is clamped together with the hoist trolley wheel, so that a back pressure effect is achieved. Meanwhile, the material of the reverse pressure wheel is nylon, so that the lower flange of the track is not damaged in the running process.

Drawings

FIG. 1 is a schematic of the present invention.

FIG. 2 is a side view of a clamping block of the present invention.

FIG. 3 is a schematic cross-sectional view along AA in FIG. 2.

Figure 4 is a schematic view of the bearing shaft and counter-pressure wheel arrangement of the invention.

Fig. 5 is a side view schematic of the present invention.

Figure 6 is a schematic illustration of the present invention in use.

Fig. 7 is a side view of fig. 6.

Fig. 8 is a schematic diagram of the stress analysis of the backpressure wheel of the present invention.

Detailed Description

Referring to the attached drawings 1-7, a track reverse pressing wheel device comprises clamping support blocks 1, a bearing shaft 2, a reverse pressing wheel 3, compression springs 4 and connecting bolts 5, wherein an axial through hole 11 is formed in the middle of each clamping support block 1, an upper through hole 12 is designed at the upper end of each clamping support block 1, a lower through hole 13 is designed at the lower end of each clamping support block 1, the reverse pressing wheel 3 is rotatably installed at the upper end of each clamping support block 1 through the bearing shaft 2, the clamping support blocks 1 are provided with two clamping support blocks 1, the two clamping support blocks 1 are installed in a crossed mode, the middle of each clamping support block 1 penetrates through the axial through hole 11 through a rotating shaft 6 to be rotatably connected, and the connecting bolts 5 sequentially penetrate through the lower through holes 13 of the two clamping support blocks 1 and the compression springs 4 from one side; the rotating shaft 6 is installed on the travelling crane trolley 7, the rotating shaft 6 is located below the I-shaped rail 8, and the back pressure wheel 3 is pressed below the lower flange of the I-shaped rail 8. The nut can adopt the auto-lock nut, can increase the supplementary fixed locking of gasket when bolt and nut use.

The clamping support block 1 comprises a middle cylinder 14, an upper end plate 15, an L-shaped plate 16 and a reinforcing plate 17, wherein an axial through hole 11 is formed in the middle of the middle cylinder 14, the upper end plate 15 is installed above the middle cylinder 14, the L-shaped plate 16 is obliquely installed below the middle cylinder 14, the reinforcing plate 17 is installed on the outer side of the L-shaped plate 16, and the upper end of the reinforcing plate 17 is connected below the middle cylinder 14; a lower through hole 13 is designed at the lower end of the L-shaped plate 16 close to the inner side, the upper through hole 12 is in the same direction as the axial through hole 11, one end of the bearing shaft 2 is installed in the upper through hole 12, and the other end of the bearing shaft 2 is rotatably installed in the reverse pressing wheel 3 through a bearing.

The lower through hole 13 is vertical to the axial through hole 11, and the lower through hole 13 is obliquely designed at the lower end of the L-shaped plate 16.

The two clamping support blocks 1 are oppositely and crossly arranged, and the traveling paths of the two reverse pressing wheels 3 are overlapped.

The upper end plate 15 lower extreme be connected with the last semicircle of middle cylinder 14 and middle cylinder 14 inboard protrusion upper end plate 15, form circular boss, 16 upper ends of L template are connected in the middle of circular boss below, reinforcing plate 17 upper end is connected with half of middle cylinder 14 lower extreme lower semicircle and middle cylinder 14 lower extreme lower semicircle is the lower semicircle that is close to L template 16 slope side.

The rotating shaft 6 is a bearing shaft of the traveling crane trolley 7, two ends of the bearing shaft are respectively connected with the lower ends of the traveling mechanisms 71 on two sides of the traveling crane trolley 7, the upper end of the electric hoist 9 is rotatably fixed in the middle of the bearing shaft, the track 8 counter-pressing wheel 3 device is arranged on the bearing shaft between the upper end of the electric hoist 9 and the lower end of the traveling mechanism 71, the two clamping support blocks 1 are crossed and rotatably arranged on the bearing shaft through axial through holes 11, and the pre-tightening force of the compression spring 4 is adjusted through the connecting bolt 5 and the nut, so that the two counter-pressing wheels 3 are pressed below the lower flange of the I-shaped track 8.

The track 8 reverse pressing wheel 3 device is designed with one group or two groups.

The clamping support block 1 is integrally forged or cast by adopting an aluminum alloy material.

The counter pressure wheel 3 is made of nylon material.

Open in the middle of the reverse pressure wheel 3 has the dead eye, and it has the jump ring groove still to design near oral area position in the dead eye, and the bearing is installed in the dead eye and is located the jump ring inslot in the outer lane outside of bearing through the jump ring card, bearing shaft 2 includes left end axle, right-hand member axle and middle arch, and left end axle tip design has the screw hole, and right-hand member axle is close to end position design and has a round annular groove, and left end axle and right-hand member connection right-hand member axle are connected to middle protruding left end, and right-hand member axle is installed in the bearing inner circle and is stretched out behind the inner circle of bearing, and the jump ring card is blocked in the annular groove of right-hand member axle and the jump ring keeps off in the inner circle outside, and the inner circle inboard is leaned on middle arch, and left end axle tip passes.

As fig. 8 force analysis:

1. spring compression force F₁Is compressively deformed by the compressive force F₁The component forces in the XY directions are respectively:

F₁cos ϴ and F₁sinϴ。

X is the horizontal direction and Y is the vertical direction.

The included angle between the two clamping support blocks is 103 degrees.

ϴ=（180°-103°）/2=38.5°。

2. Wherein the component force of the vertical wheel arm is F₁cosϴ = 0.78 F₁。

3. Since L1 ≈ L2, F₂= F₁cosϴ = 0.78 F₁。

4、F₂Has 2 component forces in X, Y direction, wherein the component force in Y direction is the positive pressure of the counter-pressure wheel, and the specific pressure is F₂cosϴ= 0.78 F₂=0.78*0.78F1 = 0.6 F₁。

5. Since the spring pressures are mutual, the spring force F₁Under the action of the pressure sensor, positive pressure of 2 counter pressure wheels can be obtained simultaneouslyForce, magnitude was 0.6F respectively₁。

6. And the magnitude of this positive pressure increases with increasing arm length of L1.

7. The magnitude of the 2 positive pressures can change along with the change of the spring force and is always equal.

8. The friction force is f = MF_NWhere M is the coefficient of friction, a fixed value, followed by a positive pressure, where F_N=2*0.6F1=1.2 F₁。

9. The return pulley is generally u =0.02, and the friction force is then F =0.02 × 1.2F₁=0.024 F₁。

When the track reverse pressing wheel device is used, one or two groups of track reverse pressing wheel devices 10 are designed, are arranged on the bearing shafts of the traveling crane trolleys 7 below the tracks 8, and can be arranged in one or two symmetrical ways; the track 8 is "worker" font, including top flange, bottom flange and connect top flange, the web on bottom flange, the reverse pressure wheel 3 device is including pressing from both sides tight piece 1, bearing shaft 2, reverse pressure wheel 3, compression spring 4, connecting bolt 5 etc.. The stress of the reverse pressing wheel 3 and the I-shaped track is adjusted by adjusting the corresponding included angle of the two clamping support blocks 1 through adjusting the tension of the compression spring 4, so that the trolley is protected from sliding when lifting heavy objects. The clamping support block 1 is made of aluminum alloy material, a group of two clamping support blocks are symmetrically assembled, and a hole is formed in the middle of each clamping support block and connected with a trolley bearing shaft. The material of the back pressure wheel 3 is nylon. When the spring is tightened, the stress surface of the lower flange of the I-shaped rail can be enlarged, and the lower flange of the I-shaped rail is clamped together with the hoist trolley wheel, so that a back pressure effect is achieved. Meanwhile, the material of the reverse pressing wheel is nylon, so that the lower flange of the I-shaped track is not damaged in the running process.