CN114351514A - A gear pitch adjustment device for the gap area of the Strub-type rack railway bridge - Google Patents

Abstract

The invention discloses a tooth pitch adjusting device used in the gap area of a Strub-type rack railway bridge. The positions of the racks on both sides corresponding to the widened sleepers are provided with butt ends, and the positions of the widened sleepers corresponding to the butt ends of the racks on both sides are provided with abutting ends. Three-stage rack segment, the three-stage rack segment includes a standard gear, a positive displacement gear and a negative displacement gear, and the electronic control actuator makes the standard gear, the positive displacement gear and the negative displacement gear on both sides of the rack butt ends switch between. According to the thermal expansion and cold contraction of the bridge gap area, positive displacement processing and negative displacement processing are performed on the rack in the gap area. The tensile fracture of the rack caused by it ensures the safe and stable operation of the rack train on the bridge.

Description

A gear pitch adjustment device for the gap area of the Strub-type rack railway bridge

technical field

The invention belongs to the technical field of rail transit planning and research, and particularly relates to a tooth pitch adjusting device for the gap area of a Strub-type rack railway bridge.

Background technique

The Montville cog railway abroad is a typical Strub type cog railway. It is located in Chamonix, a famous tourist city in eastern France. It was completed and put into operation in 1909. It was only opened from May 29, 1909 to October 15 of that year. It carried 47,480 passengers a day, a huge success at the time.

In order to increase the capacity, a catenary was installed on the line in 1953 and diesel and electric trains were added later. The line is 5.1km long, adopts Strub mode, the gauge is 1000mm, the maximum gradient reaches 220‰, and the line height difference is 871m, 2009 More than 800,000 tourists take this line of cog trains every year. In recent years, the cog railway has been valued because of its super climbing ability that other rail transit does not have. Sichuan Province took the lead in launching the construction of the first cog railway—Dujiangyan to Siguniang Mountain Mountain Rail Transit Project. The project is located in Sichuan Province. In Chengdu and Aba Prefecture, the rack line is not yet mature in China. In the connection between the rack line and the bridge, the bridge will shrink under the influence of the external temperature and the rack and rack will be stretched, which will cause serious damage to the safe operation of rack vehicles. hidden danger.

The invention is a tooth pitch adjusting device designed for the shrinkage at the bridge gap, which ensures that the tooth pitch can be adjusted to cope with the stretching of the rack by the bridge shrinkage during the bridge shrinkage process.

SUMMARY OF THE INVENTION

The invention aims at the arrangement form of the rack railway at the gap of the bridge. The bridge is affected by the temperature and the load of the rack vehicle, resulting in the expansion and contraction of the bridge. As well as the problem of unstable meshing of gears and racks, a gear pitch adjusting device in the gap area of the bridges of the Sturb system is proposed.

In order to solve the above-mentioned technical problems, the present invention is achieved through the following technical solutions:

The utility model relates to a tooth pitch adjusting device for the gap area of a Strub-type rack railway bridge. Corresponding to the position of the bridge gap, a widened sleeper is installed on the upper side of the gap, and the positions of the two sides of the rack corresponding to the widened sleeper have butting ends. , a third-stage rack segment is installed at the position of the widened sleeper corresponding to the butt ends of the racks on both sides, and the third-level rack segment is used to connect the racks on both sides;

The three-stage rack segment includes a central standard gear, and the two sides of the standard gear are positive displacement gears and negative displacement gears. The widened sleeper corresponds to both sides of the three-stage rack segment. Electric control actuators are installed on both sides. The electronically controlled actuator is used to drive the three-stage rack segment, and is used to switch the corresponding standard gear, the positive displacement gear and the negative displacement gear between the butt ends of the racks on both sides.

Further, the standard gear, the positive displacement gear and the negative displacement gear have the same module, number of teeth and pressure angle, and the positive displacement gear has a corresponding increase in the tip circle and the root circle relative to the standard gear. , the height of the tooth root decreases, the height of the tooth tip increases, and the thickness of the indexing scallop and the tooth root scallop increase;

Compared with the standard gear, the negative displacement gear has a corresponding reduction in the addendum circle and the tooth root circle, the tooth root height increases, the tooth addendum height decreases, and the pitch circle tooth thickness and the tooth root circle tooth thickness are both reduced.

Further, displacement sensors are installed on both sides of the three-stage rack section corresponding to the position of the bridge gap, and the displacement sensors are used to monitor the change of the gap distance and control the operation of the corresponding electric control execution device.

Further, the electrically controlled execution device and the side wall of the corresponding three-stage rack segment are supported by electrically controlled springs.

Further, the widened sleeper is provided with sleeper grooves for stable lateral movement of the third-stage rack segment.

Further, the lower side wall of the tertiary rack segment is in contact with the bottom of the sleeper groove, and a wear plate is fixed on the lower side wall of the tertiary rack segment.

Further, the connecting ends of the standard gear, the positive displacement gear and the negative displacement gear and the racks on both sides are all provided with wedge pins, and the racks on both sides are correspondingly provided with wedge-shaped grooves for engaging the wedge pins.

Further, a pressure plate is installed between the wedge-shaped pin and the wedge-shaped groove, and the pressure plate is made of PEI material with elasticity and high wear resistance.

The present invention has the following beneficial effects:

This invention is based on the thermal expansion and contraction of the strub-type rack railway bridge due to the influence of temperature, which leads to a large shrinkage in the gap of the bridge, resulting in severe stretching of the rack and rack. The traditional rack rack and track sleeper are If the connection is fixed, the stretching of the rack will cause the rack to break and cause great harm to the safe operation of the rack vehicle. According to the working principle of the displacement gear, the positive displacement processing and negative displacement processing are performed on the rack in the gap area according to the thermal expansion and contraction of the bridge gap area, and the rack in the bridge gap area is displaced with the help of the electrical signal transmitted by the displacement sensor. Therefore, the tensile fracture of the rack caused by the bridge shrinkage can be solved, so that the rack train can run safely and stably on the bridge.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required to describe the embodiments will be briefly introduced below. For those of ordinary skill in the art, under the premise of no creative work, they can also Additional drawings are obtained from these drawings.

Figure 1: Structure diagram of the present invention.

Fig. 2: A partial enlarged view of part A of Fig. 1 of the present invention.

Figure 3: Top view of Figure 1 of the present invention.

Figure 4: Front view of Figure 1 of the present invention.

Figure 5: The structure diagram of the three-stage rack segment of the present invention.

Fig. 6: The official drawing of Fig. 5 of the present invention.

Figure 7: Structure diagram of the pressure plate of the present invention.

Figure 8: The working principle diagram of the displacement sensor of the present invention.

In the accompanying drawings, the list of components represented by each number is as follows:

Widened sleeper 1, rack 4, tertiary rack segment 2, standard gear 21, standard gear 21, positive displacement gear 22, negative displacement gear 23, electric control actuator 3, displacement sensor 12, electric control spring 31. Sleeper groove 11, wear plate 24, wedge pin 25, wedge groove 41, pressure plate 42.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

In the present invention, it should be understood that: "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "surroundings", etc. indicate orientation or position Relationships are provided for ease of describing the present invention and to simplify the description, and are not intended to indicate or imply that the components referred to must have a particular orientation.

As shown in Figure 1-6: a gear pitch adjustment device for the gap area of a Strub-type rack railway bridge, corresponding to the position of the bridge gap, a widened sleeper 1 is installed on the upper side of the gap, and the racks 4 on both sides are installed The position corresponding to the widened sleeper 1 has a butt end. The position of the widened sleeper 1 corresponding to the butt ends of the racks 4 on both sides is provided with a three-stage rack section 2, and the three-stage rack section 2 is used to connect the two sides. rack 4;

The third-stage rack segment 2 includes a central standard gear 21 , and the two sides of the standard gear 21 are a positive displacement gear 22 and a negative displacement gear 23 . The electric control actuator 3 is installed on both sides, and the electric control actuator 3 is used to drive the three-stage rack segment 2, and is used to make the corresponding standard gear 21, positive displacement gear 22 and negative displacement gear 23 on both sides. switch between the butt ends of the rack 4. The pitch adjustment device is divided into two parts: active control and passive adjustment. Displacement sensors are installed at both ends of the bridge gap to monitor the distance between the two ends of the gap in real time. Under normal environmental conditions, the distance at the gap is 100 mm. Due to the influence of temperature rise and fall, the bridge will undergo thermal expansion and contraction, and its deformation is mainly in the bridge gap area.

As shown in Figure 5-6: the standard gear 21, the positive displacement gear 22 and the negative displacement gear 23 have the same module, number of teeth and pressure angle. The positive displacement gear has the same tooth tip relative to the standard gear. The circle and the root circle increase accordingly, the tooth root height decreases, the addendum height increases, and the thickness of the indexing circle and the tooth root circle increase;

Compared with the standard gear, the negative displacement gear has a corresponding reduction in the addendum circle and the tooth root circle, the tooth root height increases, the tooth addendum height decreases, and the pitch circle tooth thickness and the tooth root circle tooth thickness are both reduced. Adjust the tooth pitch by displacement to make up for the excessive deformation at the gap of the bridge. If the standard rack pitch changes too much, it is easy to cause a strong meshing impact of the rack and pinion and cause the rack to break. The displacement range of the independent three-stage rack segment depends on the temperature of the bridge. , The maximum deformation caused by the train load is set to meet the deformation range of the bridge.

As shown in Figures 1 and 8, displacement sensors 12 are installed on both sides of the third-stage rack section 2 at the position of the bridge gap. The displacement sensors 12 are used to monitor the change of the gap distance and control the corresponding electric control execution device. 3 run.

Displacement sensor is a linear device that belongs to metal induction. After the power is turned on, an alternating magnetic field will be generated on the sensing surface of the switch. When the metal object approaches the sensing surface, eddy current will be generated in the metal and absorb the energy of the oscillator. , make the output amplitude of the oscillator attenuate linearly, and then complete the purpose of non-contact detection of objects according to the change of the attenuation. Here, the distance change of the bridge gap is converted into an electrical signal and transmitted to the electric control actuator, and the tooth pitch change is adjusted by the distance change. The displacement sensor has no sliding contact, and is not affected by non-metallic factors such as dust during operation, and has low Power consumption, long life, can be used in various harsh conditions.

The influence of temperature on the bridge is a process of real-time change, so when the displacement sensor detects that the deformation at both ends of the bridge gap does not exceed 10 mm, the independent three-stage rack segment will not change teeth; when the bridge is affected by the external low temperature, the bridge The speed of internal molecular motion decreases, the two ends of the bridge gap shrink, and the gap distance increases. When the monitoring distance of the displacement sensor reaches 110 mm, the transmitted electrical signal will be controlled by the electronic control actuator to push the positive displacement rack segment to the middle position. The gear pitch is adjusted by the positive displacement rack to make up for the excessive stretching of the rack due to the increase in the gap; when the bridge is affected by the external high temperature, the molecular motion speed inside the bridge increases and the ends of the bridge gap expand, and the gap distance becomes smaller. The displacement sensor monitors When the distance reaches 90 mm, the transmitted electrical signal will push the negatively displaced rack segment to the middle position through the electronically controlled actuator, and adjust the tooth pitch through the negatively displaced rack to compensate for the gap and reduce the excessive compression of the rack; The device compensates for the distance change between the two ends of the bridge gap through the adjustment of the positive and negative displacement racks, and can effectively alleviate the meshing impact of the rack and pinion when the bridge is deformed to ensure the safe passage of the rack train on the bridge.

As shown in FIG. 2 , the electronically controlled actuator 3 and the side wall of the corresponding three-stage rack segment 2 are supported by electronically controlled springs 31 .

As shown in FIG. 2 , the widened sleeper 1 is provided with a sleeper groove 11 for the third-stage rack section 2 to stably move laterally. The electric signal transmitted by the displacement sensor controls the elastic force of the electric control springs on both sides to push the independent three-stage rack segment left and right. The rack segment is positioned through the base and the sleeper slot of the widened sleeper. The thickness of each rack segment is 60 mm, and the clearance distance at both ends of the sleeper groove is also 60 mm.

As shown in FIG. 5 , the lower side wall of the tertiary rack segment 2 is in contact with the bottom of the sleeper groove 11 , and a wear plate 24 is fixed on the lower side wall of the tertiary rack segment 2 .

As shown in Figures 2 and 5: the connection ends of the standard gear 21, the positive displacement gear 22 and the negative displacement gear 23 and the racks on both sides are provided with wedge pins 25, and the racks 4 on both sides are correspondingly provided with clips into the wedge-shaped groove 41 of the wedge-shaped pin 25 . The distance signals transmitted by the displacement sensor are different, and the different racks that control the three-stage rack segment are connected with the racks and racks at both ends through wedge pins.

As shown in FIGS. 2 and 7 , a pressure plate 42 is installed between the wedge-shaped pin 25 and the wedge-shaped groove 41 , and the pressure plate 42 is made of PEI material with elasticity and high wear resistance. The pressure plate is located at the connection between the independent three-stage rack segment and the wedge pins of the racks at both ends, and is installed independently. The pressure plate is made of PEI material, which has a certain hardness and strength, as well as elasticity and high wear resistance. When the displacement sensor transmits When the distance change signal does not exceed 10 mm, the connection between the racks at both ends and the independent three-stage rack segment can compensate for the distance change of the bridge end by compressing the pressure plate. The overall pressure plate is a trapezoidal groove structure, which can meet the rack tension and Compensation for distance when compressing.

The above-disclosed preferred embodiments of the present invention are provided only to help illustrate the present invention. The preferred embodiments are not exhaustive of all the details. Obviously, many modifications and variations are possible in light of the content of this specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims (8)

1. The utility model provides a be used for regional tooth pitch adjusting device in Strub formula cogged rail railway bridge clearance which characterized in that: the bridge rack is characterized in that a widened sleeper (1) is installed on the upper side of the gap corresponding to the gap of a bridge, butt joint ends are arranged at the positions, corresponding to the widened sleeper (1), of the rack rails (4) on the two sides, a three-level rack section (2) is installed at the positions, corresponding to the butt joint ends of the rack rails (4) on the two sides, of the widened sleeper (1), and the three-level rack section (2) is used for connecting the rack rails (4) on the two sides;

tertiary rack section (2) are including the standard gear (21) of central authorities, and the both sides of standard gear (21) are positive deflection gear (22) and negative deflection gear (23), automatically controlled final controlling element (3) are all installed to the both sides that widen type sleeper (1) correspond tertiary rack section (2), automatically controlled final controlling element (3) are used for driving tertiary rack section (2) for make corresponding standard gear (21), positive deflection gear (22) and negative deflection gear (23) switch between rack (4) butt joint end of both sides.

2. The device of claim 1, wherein the pitch adjustment device is adapted to adjust the pitch of the gap region of the Strub-type rack rail railway bridge, and comprises: the standard gear (21), the positive modified gear (22) and the negative modified gear (23) have the same corresponding modulus, tooth number and pressure angle, the addendum circle and the dedendum circle of the positive modified gear are correspondingly increased, the tooth root height is reduced, the addendum height is increased, and the tooth thickness of the reference circle and the tooth thickness of the dedendum circle are increased relative to the standard gear;

compared with a standard gear, the addendum circle and the dedendum circle of the negative modified gear are correspondingly reduced, the dedendum height is increased, the addendum height is reduced, and the reference circle tooth thickness and the dedendum circle tooth thickness are both reduced.

3. The device of claim 1, wherein the pitch adjustment device is adapted to adjust the pitch of the gap region of the Strub-type rack rail railway bridge, and comprises: displacement sensor (12) are all installed to the both sides that the position of bridge gap corresponds tertiary rack section (2), displacement sensor (12) are used for monitoring the change of gap distance to the operation of the automatically controlled final controlling element (3) that control corresponds.

4. The device for adjusting the pitch of the gap area of a Strub-type toothed rail railway bridge according to any one of claims 1 to 3, wherein: and the electric control executing device (3) and the corresponding side wall of the three-level rack segment (2) are supported by an electric control spring (31).

5. The device of claim 4, wherein the pitch adjustment device is adapted to adjust the pitch of the gap region of the Strub-type toothed rail railway bridge, and comprises: the widened sleeper (1) is provided with a sleeper groove (11) for the stable transverse movement of the three-level rack segment (2).

6. The device of claim 5, wherein the pitch adjustment device is adapted to adjust the pitch of the gap region of the Strub-type toothed rail railway bridge, and comprises: the lower side wall of the three-level rack segment (2) is in contact with the bottom of the sleeper groove (11), and a wear plate (24) is fixed on the lower side wall of the three-level rack segment (2).

7. The device of claim 4, wherein the pitch adjustment device is adapted to adjust the pitch of the gap region of the Strub-type toothed rail railway bridge, and comprises: the standard gear (21), the positive modified gear (22), the negative modified gear (23) and the connecting ends of the racks on the two sides are provided with wedge-shaped pins (25), and the racks (4) on the two sides are correspondingly provided with wedge-shaped grooves (41) clamped into the wedge-shaped pins (25).

8. The device of claim 7, wherein the pitch adjustment device is adapted to adjust the pitch of the gap region of the Strub-type rack rail railway bridge, and comprises: and a pressure plate (42) is arranged between the wedge-shaped pin (25) and the wedge-shaped groove (41), and the pressure plate (42) is made of PEI (polyetherimide) with elasticity and high wear resistance.

Images