A processing method of overhead rack rail expansion joint and joint expansion rail
By setting multiple tooth blocks and linkage mechanisms at the expansion joint of the overhead gear rack, automatic equal tooth pitch change under temperature changes is achieved, solving the connection problem of the expansion joint of the overhead gear rack, ensuring smooth meshing of gears and teeth, simplifying the structure and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHUZHOU CSR SPECIAL EQUIP TECH
- Filing Date
- 2023-04-13
- Publication Date
- 2026-07-07
AI Technical Summary
In the existing technology, the connection device of the overhead toothed rail expansion joint has a complex structure, requires additional power equipment to assist in the pitch change, has high cost and poor reliability, and cannot guarantee smooth meshing of gears and toothed rails under a wide range of temperature changes.
Multiple individual tooth blocks are connected by a linkage mechanism. The parallelogram mechanism is used to achieve equal tooth pitch changes between adjacent teeth. Combined with guide rod guidance, tooth flipping is avoided. The structure is simple and requires no additional power equipment.
It enables automatic equal tooth pitch change of the gear expansion joint under temperature changes, ensuring smooth meshing of gears and teeth, reducing costs and improving reliability, and enhancing passenger comfort.
Smart Images
Figure CN116463894B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a method for treating expansion joints in rack and toothed rails and connecting rack and toothed rails, and more particularly to a method for treating expansion joints in overhead rack and toothed rails and connecting expansion and contraction rack and toothed rails, belonging to the technical field of supporting facilities and equipment for overhead rack and toothed rail trains. Background Technology
[0002] Currently, both domestically and internationally, the rack rails of existing rack rail vehicles are generally laid along the ground and installed on sleepers using fasteners. Each rack rail is relatively short. If the length direction of the track is defined as longitudinal and the width direction as transverse, then a small expansion joint is provided between adjacent rack rails in the longitudinal direction. This allows for a certain amount of relative displacement between the rack rails in the longitudinal direction. Under the influence of temperature, the rack rails slide relative to the sleepers in the longitudinal direction, thereby releasing the thermal stress on the rack rails. Because the rack rails are short, the change in joint gap is very small, allowing the rack and gear to mesh normally.
[0003] However, the elevated rack-and-scraper sightseeing train uses a continuous steel structure with columns suspended above the ground, each beam approximately 100m long. Rack-and-scraper sightseeing trains are widely used in mountainous tourist areas and snow sports venues, where the annual temperature difference can reach 75℃. Under strong sunlight, the temperature of the steel track beam can be up to 20℃ higher than the air temperature, resulting in an annual temperature difference of approximately 95℃ (±47.5℃). The linear expansion coefficient of steel is 10.6×10⁻⁶~12.2×10⁻⁶ (1 / ℃), and the maximum expansion and contraction length of a 100m continuous beam under a temperature difference of 95℃ is approximately ±58mm. Therefore, due to the length of the continuous beam, large gaps are designed at the joints between beams to release the temperature stress of the track beam, and the gaps vary considerably. Consequently, the expansion joints between longitudinally adjacent rack rails also change significantly with the variations in the continuous beam length. When the expansion joint between longitudinally adjacent rack rails is too large, the gears and rack rails will not mesh properly. Therefore, it is necessary to install connecting expansion racks between longitudinally adjacent rack rails. When the rack train passes between longitudinally adjacent rack rails, the connecting expansion racks ensure that the gears of the rack train are always in a meshed state with the rack rails, thus ensuring the normal operation of the rack train. When designing connecting expansion racks, it is necessary to consider that when the size of the expansion joint between adjacent rack rails changes due to temperature, the length of the connecting expansion rack needs to change with the size of the expansion joint, and the distance between adjacent teeth on the connecting expansion rack (hereinafter referred to as tooth pitch) must change by an equal amount. This achieves the design effect of the connecting expansion rack while ensuring the smoothness of the meshing between the rack train's gears and the teeth on the connecting expansion rack, thereby ensuring passenger comfort.
[0004] Chinese invention patent application CN 114197257 A, published on March 18, 2022, discloses a variable pitch rack for use at expansion joints of Strub rack railway bridges. It includes two steel rails erected on the bridge, with a rack installed at the center of the two rails. Sleepers are evenly distributed between the rails and the rack and the bridge deck. The rack spanning the expansion joint is a variable pitch rack, composed of multiple rack units. Releasable rack clamping arms are installed on both sides of the variable pitch rack corresponding to the expansion joint, used for longitudinally constraining and releasing the rack units. Each rack unit includes a tooth head and a tooth seat. Multiple elastic tension members are installed on both sides of the variable pitch rack, located between adjacent tooth seats. The releasable rack clamping arm includes clamping arms and cylinders that drive the clamping arms to press against each tooth seat. A displacement sensor is installed at the bridge expansion joint to control the operation of the cylinders.
[0005] According to the description in the aforementioned patent document, the variable pitch rack in the patent document, when the bridge expansion joint deforms, is pulled outward by a cylinder, the clamping arm separates from the rack, and under the action of the elastic tension member between the tooth block units, undergoes an equal displacement (see paragraph
[0054] in the patent document specification). However, the phrase "a equal displacement" in the above description should refer to "a displacement that shrinks by an equal amount," only considering the case where the expansion joint shrinks, without specifically disclosing a technical solution for how to solve the problem when the expansion joint enlarges. In addition, the structure of this technical solution is relatively complex, requiring additional power equipment such as cylinders and displacement sensors to assist the variable pitch rack in changing the pitch by an equal amount. This results in high costs, and the cylinders and displacement sensors are easily damaged in harsh external environments, leading to poor reliability.
[0006] In summary, a method for handling expansion joints in overhead rack rail systems and a corresponding connecting rack rail are urgently needed. This method should effectively address the rack rail connection issue at the expansion joint, and the designed connecting rack rail should automatically adjust its tooth pitch to change proportionally with the size of the expansion joint. This would satisfy the design requirements of the connecting rack rail while ensuring smooth meshing between the rack rail's gears and the connecting rack rail's teeth, thus guaranteeing passenger comfort. Furthermore, a simplified structure, eliminating the need for additional power equipment to assist in the proportional tooth pitch change of the connecting rack rail, reducing costs, and improving reliability are pressing technical challenges that require resolution. Summary of the Invention
[0007] The technical problem this invention aims to solve is to address the deficiencies in existing technologies by providing a method for handling expansion joints in overhead rack rail systems and a connecting expansion rack rail. This method effectively addresses the rack rail connection problem at expansion joints, and the designed connecting expansion rack rail automatically adjusts its tooth pitch by an equal amount as the length of the expansion joint changes. This satisfies the design requirements of the connecting expansion rack rail and ensures smooth meshing between the gears of the rack rail train and the teeth on the connecting expansion rack rail, thereby guaranteeing passenger comfort. Furthermore, its simple structure eliminates the need for additional power equipment to assist in the equal tooth pitch adjustment of the connecting expansion rack rail, reducing costs and improving reliability.
[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a method for treating expansion joints of overhead toothed rails. The method involves setting a connecting expansion toothed rail at the expansion joint between adjacent toothed rails. The length of the connecting expansion toothed rail can automatically change with the length of the expansion joint, and when the length of the connecting expansion toothed rail changes, the tooth pitch between adjacent teeth in the connecting expansion toothed rail changes by an equal amount.
[0009] Preferably, the connecting telescopic toothed rail is configured as multiple individual tooth blocks, which are connected by a linkage mechanism. The length of the connecting telescopic toothed rail can automatically change with the length of the expansion joint. This is achieved by connecting two tooth blocks located at both ends of the connecting telescopic toothed rail to the ends of adjacent toothed rails. When the length of the expansion joint changes, the ends of the adjacent toothed rails drive the two tooth blocks to move, and then the linkage mechanism drives the other toothed rails to move, thereby changing the length of the connecting telescopic toothed rail.
[0010] Preferably, when the length of the connecting telescopic toothed rail changes, a linkage mechanism is used to ensure that the tooth pitch between adjacent teeth in the connecting telescopic toothed rail changes by an equal amount.
[0011] Preferably, the linkage mechanism includes a linkage mechanism one, which incorporates multiple parallelogram mechanism one and parallelogram mechanism two. These parallelogram mechanism one and parallelogram mechanism two connect multiple tooth blocks, ensuring that the tooth pitch between adjacent teeth in the connecting telescopic tooth rail changes by an equal amount when the linkage mechanism is activated.
[0012] Preferably, the linkage mechanism includes a rod body disposed on the side of each tooth block and a connecting arm hinged to the rod body. The rod body includes an end rod body one that is laterally fixed to one side of end tooth one and end tooth two, and an intermediate rod body one that is laterally fixed to the side of each intermediate tooth. The connecting arm includes an end connecting arm one and an end connecting arm two that are hinged to the end rod body one, and an intermediate connecting arm one and an intermediate connecting arm two that are hinged to each intermediate rod body one. One end of the end connecting arm one and the end connecting arm two is hinged to the end rod body one, and the middle part of the intermediate connecting arm one and the intermediate connecting arm two is hinged to the intermediate rod body one. Both ends of each intermediate connecting arm and the other end of each end connecting arm are hinge points for connecting adjacent tooth blocks.
[0013] The connection structure between two end teeth and an intermediate tooth via a linkage mechanism includes a first connection structure between the end teeth and the intermediate teeth adjacent to the end teeth, and a second connection structure between two adjacent intermediate teeth.
[0014] The first connection structure is to hinge the other end of the end connecting arm 1 on the end tooth to one end of the middle connecting arm 2 on the middle tooth, and the other end of the end connecting arm 2 on the end tooth to one end of the middle connecting arm 1 on the middle tooth. In the first connection structure, the hinge point between one end of the end connecting arm 1 and the end connecting arm 2 and the end rod 1 is set as point A, the hinge point between the other end of the end connecting arm 1 on the end tooth and one end of the middle connecting arm 2 on the middle tooth is set as point B, the hinge point between the middle part of the middle connecting arm 1 and the middle connecting arm 2 and the middle rod 1 is set as point C, and the hinge point between the other end of the end connecting arm 2 on the end tooth and one end of the middle connecting arm 1 on the middle tooth is set as point D. The lines connecting points A, B, C, and D in sequence form a parallelogram mechanism.
[0015] The second connection structure involves hinged connections between one end of a middle connecting arm 1 on one intermediate tooth and one end of a middle connecting arm 2 on another intermediate tooth, and between one end of a middle connecting arm 2 on one intermediate tooth and one end of a middle connecting arm 1 on the other intermediate tooth. In this second connection structure, the hinge point between the middle connecting arm 1 and the middle connecting arm 2 on one intermediate tooth and the middle rod 1 is designated as point E; the hinge point between one end of a middle connecting arm 1 on one intermediate tooth and one end of a middle connecting arm 2 on another intermediate tooth is designated as point F; the hinge point between the middle connecting arm 1 and the middle connecting arm 2 on the other adjacent intermediate tooth and the middle rod 1 is designated as point G; and the hinge point between one end of a middle connecting arm 2 on one intermediate tooth and one end of a middle connecting arm 1 on another intermediate tooth is designated as point H. The lines connecting points E, F, G, and H in sequence form a parallelogram mechanism two.
[0016] The present invention also discloses a connecting telescopic toothed rail, which includes multiple independent tooth blocks. Each of the multiple independent tooth blocks includes an end tooth, an end tooth, and an intermediate tooth disposed between the end tooth and the end tooth. The end tooth, the end tooth, and the intermediate tooth are connected by a linkage mechanism. Under the action of the linkage mechanism, the tooth pitch L1 between adjacent tooth blocks can decrease or increase by an equal amount.
[0017] Preferably, the linkage mechanism includes a first linkage mechanism, which is disposed on one side of the plurality of tooth blocks;
[0018] The linkage mechanism includes a rod body disposed on the side of each tooth block and a connecting arm hinged to the rod body. The rod body includes an end rod body 1 laterally fixed to one side of end tooth 1 and end tooth 2, and an intermediate rod body 1 laterally fixed to the side of each intermediate tooth. The connecting arm includes an end connecting arm 1 and an end connecting arm 2 hinged to the end rod body 1, and an intermediate connecting arm 1 and an intermediate connecting arm 2 hinged to each intermediate rod body 1. One end of each end connecting arm 1 and end connecting arm 2 is hinged to the end rod body 1, and the middle part of each intermediate connecting arm 1 and intermediate connecting arm 2 is hinged to the intermediate rod body 1. Both ends of each intermediate connecting arm and the other end of each end connecting arm are hinge points connecting adjacent tooth blocks.
[0019] The connection structure between two end teeth and an intermediate tooth via a linkage mechanism includes a first connection structure between the end teeth and the intermediate teeth adjacent to the end teeth, and a second connection structure between two adjacent intermediate teeth.
[0020] The first connection structure is to hinge the other end of the end connecting arm 1 on the end tooth to one end of the middle connecting arm 2 on the middle tooth, and the other end of the end connecting arm 2 on the end tooth to one end of the middle connecting arm 1 on the middle tooth. In the first connection structure, the hinge point between one end of the end connecting arm 1 and the end connecting arm 2 and the end rod 1 is set as point A, the hinge point between the other end of the end connecting arm 1 on the end tooth and one end of the middle connecting arm 2 on the middle tooth is set as point B, the hinge point between the middle part of the middle connecting arm 1 and the middle connecting arm 2 and the middle rod 1 is set as point C, and the hinge point between the other end of the end connecting arm 2 on the end tooth and one end of the middle connecting arm 1 on the middle tooth is set as point D. The lines connecting points A, B, C, and D in sequence form a parallelogram mechanism.
[0021] The second connection structure involves hinged connections between one end of a middle connecting arm 1 on one intermediate tooth and one end of a middle connecting arm 2 on another intermediate tooth, and between one end of a middle connecting arm 2 on one intermediate tooth and one end of a middle connecting arm 1 on the other intermediate tooth. In this second connection structure, the hinge point between the middle connecting arm 1 and the middle connecting arm 2 on one intermediate tooth and the middle rod 1 is designated as point E; the hinge point between one end of a middle connecting arm 1 on one intermediate tooth and one end of a middle connecting arm 2 on another intermediate tooth is designated as point F; the hinge point between the middle connecting arm 1 and the middle connecting arm 2 on the other adjacent intermediate tooth and the middle rod 1 is designated as point G; and the hinge point between one end of a middle connecting arm 2 on one intermediate tooth and one end of a middle connecting arm 1 on another intermediate tooth is designated as point H. The lines connecting points E, F, G, and H in sequence form a parallelogram mechanism two.
[0022] Preferably, the linkage mechanism further includes a second linkage mechanism, which is located on the other side of the plurality of tooth blocks; the structure of the second linkage mechanism is the same as that of the first linkage mechanism, and the plurality of tooth blocks are connected to each other through the first linkage mechanism and the second linkage mechanism.
[0023] Preferably, a guide rod is also provided in the plurality of individual tooth blocks. One end of the guide rod is fixed to the second end tooth, and the other end of the guide rod passes through the middle tooth and the first end tooth. The middle tooth and the first end tooth can slide back and forth along the guide rod.
[0024] Preferably, two guide rods are provided.
[0025] The beneficial effects of this invention are as follows: This invention effectively addresses the problem of toothed rail connection at expansion joints, and its designed connecting telescopic toothed rail automatically changes its tooth pitch by an equal amount as the length of the toothed rail expansion joint changes. This satisfies the design effect of the connecting telescopic toothed rail and ensures smooth meshing between the gears of the toothed rail train and the teeth on the connecting telescopic toothed rail, thereby guaranteeing passenger comfort. Furthermore, its structure is simple, requiring no additional power equipment to assist in the equal tooth pitch change of the connecting telescopic toothed rail, reducing costs and improving reliability. By designing the specific structure of the connecting telescopic toothed rail, the effect of automatic change in the connecting telescopic toothed rail according to the length of the toothed rail expansion joint is achieved. By designing the specific structure of the linkage mechanism, the tooth pitch between adjacent teeth changes by an equal amount when the length of the connecting telescopic toothed rail changes. By setting guide rods between multiple tooth blocks, a guiding function is provided while preventing tooth flipping. Attached Figure Description
[0026] Figure 1This is a schematic diagram of the structure when the expansion joint between adjacent toothed rails is treated using the processing method in Embodiment 1 of the present invention;
[0027] Figure 2 This is a schematic diagram of the main view of the connecting telescopic toothed rail in Embodiment 1 of the present invention;
[0028] Figure 3 This is a three-dimensional structural diagram of the connecting telescopic toothed rail in Embodiment 1 of the present invention;
[0029] Figure 4 for Figure 2 A partial structural diagram of the connection point between end tooth 2 and tooth track 2;
[0030] Figure 5 for Figure 2 A partial structural diagram of the connection point between two adjacent intermediate teeth;
[0031] Figure 6 for Figure 3 A schematic diagram of the three-dimensional structure after removing the linkage mechanism and some intermediate teeth;
[0032] Figure 7 for Figure 2 A partial structural diagram of a middle tooth after removing the linkage mechanism;
[0033] Figure 8 This is a top view of the connecting telescopic toothed rail structure in Embodiment 2 of the present invention;
[0034] In the diagram: 1. Toothed rail one, 2. Toothed rail two, 3. Expansion joint, 4. Connecting telescopic toothed rail, 41. End tooth one, 42. End tooth two, 43. Intermediate tooth, 5. Linkage mechanism, 51. End rod one, 52. Intermediate rod one, 53. End connecting arm one, 54. End connecting arm two, 55. Intermediate connecting arm one, 56. Intermediate connecting arm two, 6. Guide rod, 7. Linkage mechanism one, 8. Linkage mechanism two. Detailed Implementation
[0035] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0036] Example 1: As Figure 1 As shown, a connecting telescopic toothed rail 4 is installed at the expansion joint 3 between longitudinally adjacent toothed rails 1 and 2. When affected by temperature changes, the steel structure track beam changes, causing toothed rails 1 and 2 to shift longitudinally, thus changing the size of the expansion joint 3. Therefore, the length of the connecting telescopic toothed rail 4 also changes with the size of the expansion joint 3. Figure 2As shown in this application, the connecting telescopic rack 4 is divided into multiple individual tooth blocks. These individual tooth blocks include end tooth 41, end tooth 42, and intermediate teeth 43 disposed between end tooth 41 and end tooth 42. The number of intermediate teeth 43 can be one or more, and the specific number can be determined based on the experience of those skilled in the art and the intended use of the rack railway. End tooth 41, end tooth 42, and intermediate teeth 43 are connected by a linkage mechanism 5. Under the action of the linkage mechanism 5, the tooth pitch L1 between adjacent tooth blocks can decrease or increase by an equal amount. During installation, end tooth 41 of the connecting telescopic gear 4 is connected to the end of gear 1, and end tooth 42 of the connecting telescopic gear 4 is connected to the end of gear 2. When gear 1 and gear 2 undergo longitudinal displacement, such as when gear 1 and gear 2 move closer together, the expansion joint 3 decreases. Since end teeth 41 and 42 of the connecting telescopic gear 4 are connected to gear 1 and gear 2 respectively, gear 1 and gear 2 will also move closer together. Therefore, under the action of the linkage mechanism 5, the entire connecting telescopic gear... The length of rail 4 decreases as the expansion joint 3 decreases, and the tooth pitch L1 between adjacent tooth blocks decreases by an equal amount. When tooth rail 1 and tooth rail 2 move away from each other, the expansion joint 3 increases. Since the end teeth 41 and 42 of the connecting telescopic tooth rail 4 are connected to tooth rail 1 and tooth rail 2 respectively, tooth rail 1 and tooth rail 2 will also move away from each other. Therefore, under the action of the linkage mechanism 5, the length of the entire connecting telescopic tooth rail 4 increases as the expansion joint 3 increases, and the tooth pitch L1 between adjacent tooth blocks increases by an equal amount. The connecting telescopic tooth rail designed in this embodiment can automatically change the tooth pitch by an equal amount as the size of the tooth rail expansion joint changes, and there will be no phenomenon where the tooth pitch is too large, causing the gears to fail to mesh properly. It can not only meet the design effect of the connecting telescopic tooth rail, but also ensure the smooth meshing of the gears of the tooth rail train with the teeth on the connecting telescopic tooth rail, thereby ensuring the comfort of passengers. The telescopic rack designed in this embodiment does not require additional power equipment such as cylinders or sensors to assist in the equal pitch change of the telescopic rack, greatly reducing costs and improving reliability. Furthermore, through... Figure 2It can also be seen that after the connecting telescopic gear 4 in this embodiment is installed, the tooth pitch L2 between the end tooth 41 of the connecting telescopic gear 4 and the end tooth closest to the end tooth 41 of the gear 1, and the tooth pitch L3 between the end tooth 42 of the connecting telescopic gear 4 and the end tooth closest to the end tooth 42 of the gear 2, are fixed at both ends of the connecting telescopic gear 4. The only tooth pitch that changes by an equal amount is the tooth pitch L1 between adjacent tooth blocks in the connecting telescopic gear 4. In order to facilitate the periodic replacement of the connecting telescopic gear 4, the end tooth 41 of the connecting telescopic gear 4 is detachably connected to the end of the gear 1 using screws or other connectors, and the end tooth 42 of the connecting telescopic gear 4 is detachably connected to the end of the gear 2 using screws or other connectors.
[0037] like Figure 3 As shown, the linkage mechanism 5 includes a first linkage mechanism, which is disposed on one side of multiple tooth blocks. The first linkage mechanism includes a rod disposed on the side of each tooth block and a connecting arm hinged to the rod. The rod includes an end rod 51 laterally fixed to one side of end tooth 41 and end tooth 42, and an intermediate rod 52 laterally fixed to the side of each intermediate tooth 43. The connecting arm includes an end connecting arm 53 and an end connecting arm 54 hinged to the end rod 51, and an intermediate connecting arm 55 and an intermediate connecting arm 56 hinged to each intermediate rod 52. One end of each end connecting arm 53 and end connecting arm 54 is hinged to the end rod 51, and the middle of each intermediate connecting arm 55 and intermediate connecting arm 56 is hinged to the intermediate rod 52. Both ends of each intermediate connecting arm and the other end of each end connecting arm are hinge points connecting adjacent tooth blocks.
[0038] The connection structure between two end teeth and an intermediate tooth via a linkage mechanism includes a first connection structure between the end teeth and the intermediate teeth adjacent to the end teeth, and a second connection structure between two adjacent intermediate teeth. For example... Figure 4 As shown, the first connection structure is to hinge the other end of the end connecting arm 53 on the end tooth to one end of the middle connecting arm 56 on the middle tooth, and to hinge the other end of the end connecting arm 54 on the end tooth to one end of the middle connecting arm 55 on the middle tooth. In the first connection structure, the hinge point between one end of the end connecting arm 53 and the end connecting arm 54 and the end rod 51 is set as point A, the hinge point between the other end of the end connecting arm 53 on the end tooth and one end of the middle connecting arm 56 on the middle tooth is set as point B, the hinge point between the middle part of the middle connecting arm 55 and the middle connecting arm 56 and the middle rod 52 is set as point C, and the hinge point between the other end of the end connecting arm 54 on the end tooth and one end of the middle connecting arm 55 on the middle tooth is set as point D. The lines connecting points A, B, C, and D in sequence form a parallelogram mechanism.
[0039] like Figure 5 As shown, the second connection structure involves hinged connections between one end of the intermediate connecting arm 55 on one intermediate tooth and one end of the intermediate connecting arm 56 on the other intermediate tooth, and between one end of the intermediate connecting arm 56 on one intermediate tooth and one end of the intermediate connecting arm 55 on the other intermediate tooth. In the second connection structure, the hinge point between the intermediate connecting arm 55 and the intermediate connecting arm 56 on one intermediate tooth and the intermediate rod 52 is designated as point E; the hinge point between one end of the intermediate connecting arm 55 on one intermediate tooth and one end of the intermediate connecting arm 56 on the other intermediate tooth is designated as point F; the hinge point between the intermediate connecting arm 55 and the intermediate connecting arm 56 on the other adjacent intermediate tooth and the intermediate rod 52 is designated as point G; and the hinge point between one end of the intermediate connecting arm 56 on one intermediate tooth and one end of the intermediate connecting arm 55 on the other intermediate tooth is designated as point H. The lines connecting points E, F, G, and H in sequence form a parallelogram mechanism two.
[0040] By connecting the two end teeth and the middle tooth through the parallelogram mechanism one and parallelogram mechanism two in the above linkage mechanism one, the tooth pitch L1 between adjacent tooth blocks can be reduced or increased by the same amount under the action of the linkage mechanism.
[0041] like Figure 3 and Figure 6 As shown, guide rods 6 are also provided in the plurality of individual tooth blocks. In this embodiment, two guide rods 6 are provided. One end of the guide rod 6 is fixed to the inside of the second end tooth, and the other end of the guide rod 6 passes through the intermediate tooth 43 and the first end tooth 41. The intermediate tooth 43 and the first end tooth 41 can slide back and forth along the guide rod 6. In this way, one function is that when the length of the connecting telescopic tooth rail 4 changes, the guide rod 6 can guide the intermediate tooth 43 and the first end tooth 41. Another function is to prevent the teeth from flipping. Figure 7 As shown, when the connecting telescopic toothed rail meshes with the gear of the toothed rail train, the toothed part will be subjected to a force F, causing the toothed block to have a tendency to flip. In this embodiment, the toothed block can be prevented from flipping by setting a guide rod 6 inside the toothed block.
[0042] Example 2: Figure 8As shown, compared with Embodiment 1, the difference lies in that: the linkage mechanism 5, in addition to linkage mechanism 7, also includes linkage mechanism 8, which is located on the other side of the multiple tooth blocks. The structure of linkage mechanism 8 is the same as that of linkage mechanism 7, and the multiple tooth blocks are connected by linkage mechanism 7 and linkage mechanism 8. This better ensures that under the action of the linkage mechanism, the tooth pitch L1 between adjacent tooth blocks can decrease or increase by an equal amount.
[0043] In summary, this invention effectively addresses the problem of toothed rail connection at expansion joints. The designed connecting telescopic toothed rail automatically adjusts its tooth pitch by an equal amount as the length of the expansion joint changes. This satisfies both the design requirements of the connecting telescopic toothed rail and ensures smooth meshing between the gears of the toothed rail train and the teeth on the connecting telescopic toothed rail, thus guaranteeing passenger comfort. Furthermore, its simplified structure eliminates the need for additional power equipment to assist in the equal tooth pitch change, reducing costs and improving reliability. The specific structure of the connecting telescopic toothed rail achieves the effect of automatic adjustment according to the length of the expansion joint. The specific structure of the linkage mechanism ensures that the tooth pitch between adjacent teeth changes by an equal amount when the length of the connecting telescopic toothed rail changes. By placing guide rods between multiple tooth blocks, both guiding action and prevention of tooth flipping are achieved.
[0044] In this embodiment, "multiple" refers to "two or more". The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the protection scope of this invention, which is defined by the claims.
Claims
1. A method for treating expansion joints in overhead rack-type toothed rails, characterized in that: The method involves setting a connecting telescopic toothed rail at the expansion joint between adjacent toothed rails. The length of the connecting telescopic toothed rail can automatically change with the length of the expansion joint, and when the length of the connecting telescopic toothed rail changes, the tooth pitch between adjacent tooth blocks in the connecting telescopic toothed rail changes by an equal amount. The connecting telescopic toothed rail is configured as multiple individual tooth blocks, which are connected by a linkage mechanism. The length of the connecting telescopic toothed rail can automatically change with the length of the expansion joint. Two tooth blocks located at both ends of the connecting telescopic toothed rail are respectively connected to the ends of adjacent toothed rails. When the length of the expansion joint changes, the ends of the adjacent toothed rails drive the two tooth blocks to move, and then the linkage mechanism drives the other tooth blocks to move, thereby changing the length of the connecting telescopic toothed rail. When the length of the connecting telescopic toothed rail changes, the linkage mechanism ensures that the tooth pitch between adjacent tooth blocks in the connecting telescopic toothed rail changes by an equal amount. The linkage mechanism includes a linkage mechanism one, which is designed with multiple parallelogram mechanism one and parallelogram mechanism two. Multiple tooth blocks are connected through parallelogram mechanism one and parallelogram mechanism two, so that under the action of the linkage mechanism, the tooth pitch between adjacent tooth blocks in the connecting telescopic tooth rail changes by an equal amount. The linkage mechanism includes a rod body disposed on the side of each tooth block and a connecting arm hinged to the rod body. The rod body includes an end rod body 1 laterally fixed to one side of end tooth 1 and end tooth 2, and an intermediate rod body 1 laterally fixed to the side of each intermediate tooth. The connecting arm includes an end connecting arm 1 and an end connecting arm 2 hinged to the end rod body 1, and an intermediate connecting arm 1 and an intermediate connecting arm 2 hinged to each intermediate rod body 1. One end of each end connecting arm 1 and end connecting arm 2 is hinged to the end rod body 1, and the middle part of each intermediate connecting arm 1 and intermediate connecting arm 2 is hinged to the intermediate rod body 1. Both ends of each intermediate connecting arm and the other end of each end connecting arm are hinge points connecting adjacent tooth blocks. The connection structure between two end teeth and an intermediate tooth via a linkage mechanism includes a first connection structure between the end teeth and the intermediate teeth adjacent to the end teeth, and a second connection structure between two adjacent intermediate teeth. The first connection structure is to hinge the other end of the end connecting arm 1 on the end tooth to one end of the middle connecting arm 2 on the middle tooth, and the other end of the end connecting arm 2 on the end tooth to one end of the middle connecting arm 1 on the middle tooth. In the first connection structure, the hinge point between one end of the end connecting arm 1 and the end connecting arm 2 and the end rod 1 is set as point A, the hinge point between the other end of the end connecting arm 1 on the end tooth and one end of the middle connecting arm 2 on the middle tooth is set as point B, the hinge point between the middle part of the middle connecting arm 1 and the middle connecting arm 2 and the middle rod 1 is set as point C, and the hinge point between the other end of the end connecting arm 2 on the end tooth and one end of the middle connecting arm 1 on the middle tooth is set as point D. The lines connecting points A, B, C, and D in sequence form a parallelogram mechanism. The second connection structure involves hinged connections between one end of the intermediate connecting arm 1 on one intermediate tooth and one end of the intermediate connecting arm 2 on the other intermediate tooth, and between one end of the intermediate connecting arm 2 on one intermediate tooth and one end of the intermediate connecting arm 1 on the other intermediate tooth. In this second connection structure, the hinge point between the intermediate connecting arm 1 and the intermediate connecting arm 2 on one intermediate tooth and the intermediate rod 1 is designated as point E; the hinge point between one end of the intermediate connecting arm 1 on one intermediate tooth and one end of the intermediate connecting arm 2 on the other intermediate tooth is designated as point F; the hinge point between the intermediate connecting arm 1 and the intermediate connecting arm 2 on the other adjacent intermediate tooth and the intermediate rod 1 is designated as point G; and the hinge point between one end of the intermediate connecting arm 2 on one intermediate tooth and one end of the intermediate connecting arm 1 on the other intermediate tooth is designated as point H. The lines connecting points E, F, G, and H in sequence form a parallelogram mechanism two. A guide rod is also provided in the plurality of individual tooth blocks. One end of the guide rod is fixed to the second end tooth, and the other end of the guide rod passes through the middle tooth and the first end tooth. The middle tooth and the first end tooth can slide back and forth along the guide rod.
2. A connecting telescopic gear rail, characterized in that: The connecting telescopic toothed rail is set at the expansion joint between toothed rail one and toothed rail two that are longitudinally adjacent to the overhead toothed rail. It includes multiple independent tooth blocks. Each of the multiple independent tooth blocks includes end tooth one, end tooth two, and an intermediate tooth set between end tooth one and end tooth two. End tooth one, end tooth two, and intermediate tooth are connected by a linkage mechanism. Under the action of the linkage mechanism, the tooth pitch L1 between adjacent tooth blocks can decrease or increase by the same amount. The linkage mechanism includes a first linkage mechanism, which is located on one side of multiple tooth blocks. The linkage mechanism includes a rod body disposed on the side of each tooth block and a connecting arm hinged to the rod body. The rod body includes an end rod body 1 laterally fixed to one side of end tooth 1 and end tooth 2, and an intermediate rod body 1 laterally fixed to the side of each intermediate tooth. The connecting arm includes an end connecting arm 1 and an end connecting arm 2 hinged to the end rod body 1, and an intermediate connecting arm 1 and an intermediate connecting arm 2 hinged to each intermediate rod body 1. One end of each end connecting arm 1 and end connecting arm 2 is hinged to the end rod body 1, and the middle part of each intermediate connecting arm 1 and intermediate connecting arm 2 is hinged to the intermediate rod body 1. Both ends of each intermediate connecting arm and the other end of each end connecting arm are hinge points connecting adjacent tooth blocks. The connection structure between two end teeth and an intermediate tooth via a linkage mechanism includes a first connection structure between the end teeth and the intermediate teeth adjacent to the end teeth, and a second connection structure between two adjacent intermediate teeth. The first connection structure is to hinge the other end of the end connecting arm 1 on the end tooth to one end of the middle connecting arm 2 on the middle tooth, and the other end of the end connecting arm 2 on the end tooth to one end of the middle connecting arm 1 on the middle tooth. In the first connection structure, the hinge point between one end of the end connecting arm 1 and the end connecting arm 2 and the end rod 1 is set as point A, the hinge point between the other end of the end connecting arm 1 on the end tooth and one end of the middle connecting arm 2 on the middle tooth is set as point B, the hinge point between the middle part of the middle connecting arm 1 and the middle connecting arm 2 and the middle rod 1 is set as point C, and the hinge point between the other end of the end connecting arm 2 on the end tooth and one end of the middle connecting arm 1 on the middle tooth is set as point D. The lines connecting points A, B, C, and D in sequence form a parallelogram mechanism. The second connection structure involves hinged connections between one end of the intermediate connecting arm 1 on one intermediate tooth and one end of the intermediate connecting arm 2 on the other intermediate tooth, and between one end of the intermediate connecting arm 2 on one intermediate tooth and one end of the intermediate connecting arm 1 on the other intermediate tooth. In this second connection structure, the hinge point between the intermediate connecting arm 1 and the intermediate connecting arm 2 on one intermediate tooth and the intermediate rod 1 is designated as point E; the hinge point between one end of the intermediate connecting arm 1 on one intermediate tooth and one end of the intermediate connecting arm 2 on the other intermediate tooth is designated as point F; the hinge point between the intermediate connecting arm 1 and the intermediate connecting arm 2 on the other adjacent intermediate tooth and the intermediate rod 1 is designated as point G; and the hinge point between one end of the intermediate connecting arm 2 on one intermediate tooth and one end of the intermediate connecting arm 1 on the other intermediate tooth is designated as point H. The lines connecting points E, F, G, and H in sequence form a parallelogram mechanism two. A guide rod is also provided in the plurality of individual tooth blocks. One end of the guide rod is fixed to the second end tooth, and the other end of the guide rod passes through the middle tooth and the first end tooth. The middle tooth and the first end tooth can slide back and forth along the guide rod.
3. The connecting telescopic gear rail according to claim 2, characterized in that: The linkage mechanism also includes a second linkage mechanism, which is located on the other side of the multiple tooth blocks. The structure of the second linkage mechanism is the same as that of the first linkage mechanism, and the multiple tooth blocks are connected to each other through the first linkage mechanism and the second linkage mechanism.
4. The connecting telescopic gear rail according to claim 2, characterized in that: Two guide rods are provided.