Single-arm double-connecting-rod push-pull mechanism for toothed rail turnout

Abstract

The single-arm double-connecting-rod push-pull mechanism for the tooth track fork comprises electric push rods with fixed positions, and the electric push rods are vertically arranged on the outer sides of a left straight sliding rail and a right straight sliding rail in a vertical state in parallel; push-pull force output by the electric push rod in a vertical telescopic mode drives the slider-crank mechanism to swing, and swing power of the slider-crank mechanism passes through the horizontally-arranged middle connecting rod and the tail end left connecting rod and the tail end right connecting rod which are obliquely arranged in parallel at intervals and finally pushes the left force-bearing sliding plate and the right force-bearing sliding plate to complete rack rail transfer operation. The single-arm double-connecting-rod push-pull mechanism with the crank sliding block is adopted, and the problems that an existing overall flexible tooth track fork is large in occupied space, and stress cannot meet the requirement are solved; the rail transfer operation requirement of the overall flexible tooth rail turnout is met, the operation space is small, the assembly cost is low, stress meets the requirement, and the safety risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway switches, and in particular relates to a single-arm double-connecting rod push-pull mechanism for a rack track switch. Background Art

[0002] A rack railway uses a separate rail, similar to a rack, placed on the sleeper between the ordinary rails. This allows the locomotive to overcome the problem of insufficient adhesion and climb steep slopes. Therefore, the rack switch is a key component in completing the rack rail switching task.

[0003] Currently, rack rail turnouts can be categorized as integral swinging rack rail turnouts and integral flexible rack rail turnouts. Integrally swinging rack rail turnouts, with their swinging assembly fixed as a whole, result in high switching forces, high switching stresses on the movable rails, and a reduced fatigue life. In contrast, integrally flexible rack rail turnouts, with their sliding rails and rack rails capable of separate bending, offer a relatively low switching force, thereby increasing fatigue life.

[0004] In this regard, in order to design a new type of integral flexible rack rail switch to solve the problem that the existing integral flexible rack rail switch occupies a large space and the force cannot meet the demand, the following improved technical solution is proposed. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a single-arm double-link push-pull mechanism for a rack track switch, which adopts a single-arm double-link push-pull mechanism including a crank slider to solve the problem that the existing integral flexible rack track switch occupies a large space and cannot meet the force requirements.

[0006] The technical solution adopted by the utility model is as follows: a single-arm double-link push-pull mechanism for a rack rail switch, comprising an electric push rod with a fixed position, which is vertically and parallelly arranged on the outer sides of left and right straight slide rails in a vertical state; the push-pull force output by the vertical extension and contraction of the electric push rod drives the crank slider mechanism to swing, and the swinging power of the crank slider mechanism passes through the horizontally arranged middle connecting rod and the two end left and right connecting rods arranged in parallel with an inclined interval, and finally pushes the left and right load-bearing slide plates respectively to complete the rack rail track changing operation.

[0007] In the above technical solution: the crank slider mechanism consists of a crank and a slider; the crank is an arc-shaped angled structure; the crank consists of a crank shaft and a crank main arm with an arc-shaped angle; the slider consists of a fish ear shaft hole and a crank shaft hole.

[0008] In the above technical solution: the execution end of the electric push rod is hinged to one end of the slider; the other end of the slider is slidably adapted to connect to the crank input end; the crank output end is slidingly hinged to the outer input end of the horizontally arranged intermediate connecting rod; the farthest end inside the intermediate connecting rod is slidingly hinged to the upper end of the left connecting rod; the middle part of the intermediate connecting rod is slidingly hinged to the upper end of the right connecting rod; the left connecting rod and the right connecting rod are spaced parallel and inclined on the left and right straight slide rails; the lower end of the left connecting rod is slidingly hinged to the left load-bearing slide plate; the lower end of the right connecting rod is slidingly hinged to the right load-bearing slide plate; the left connecting rod and the right connecting rod respectively rotate and swing around the middle of their respective connecting rods to complete the track changing operation of the rack rail.

[0009] In any of the above technical solutions: the electric push rod includes an electric push rod cylinder, a push rod, and a front end fish ear; the electric push rod cylinder is fixed in position, and the push rod can be extended and retracted forward and backward along the axis; the front end fish ear is a ring structure; the front end fish ear is hinged to the input end of the slider.

[0010] In the above technical solution: the axes of the fish ear shaft hole and the crank shaft hole intersect vertically in space; and the fish ear shaft hole and the crank shaft hole are arranged obliquely and form a certain angle with the crank.

[0011] In the above-mentioned technical solution: the crank shaft serves as the power input end, and its shaft body is slidably adapted to connect the slider; the crank main arm is provided with a crank fixing hole at the corner; the power output end of the crank main arm is provided with a crank rotating hole; the front end fish ear of the electric push rod is connected to the fish ear shaft hole of the slider through the slider hinge shaft; the slider is connected to the crank shaft through the crank shaft hole; the crank fixing shaft fixes the rotation center of the crank through the crank fixing hole, and the crank can rotate around the crank fixing shaft.

[0012] In any of the above technical solutions: the middle connecting rod is formed with three holes, which are an arc-shaped hole, a right waist-shaped hole, and a left waist-shaped hole from the outside to the inside.

[0013] In the above technical solution: the terminal left connecting rod is respectively provided with a left rotating hole, a left fixed hole, and a left sliding groove from top to bottom; the terminal right connecting rod is respectively provided with a right rotating hole, a right fixed hole, and a right sliding groove from top to bottom.

[0014] In the above-mentioned technical solution: the crank rotating hole is connected to the arc-shaped hole of the middle connecting rod through the crank hinge shaft, the left rotating hole on the end left connecting rod is connected to the left waist-shaped hole of the middle connecting rod through the left connecting rod active hinge shaft; the right rotating hole on the end right connecting rod is connected to the right waist-shaped hole of the middle connecting rod through the right connecting rod active hinge shaft.

[0015] In the above technical solution: the terminal left connecting rod can rotate around the left connecting rod fixed axis; the terminal right connecting rod can rotate around the right connecting rod fixed axis; the left connecting rod follower hinge shaft is vertically fixedly connected to the left load-bearing slide, and the terminal left connecting rod and the left load-bearing slide are slidingly hinged through the left slide groove, wherein the left connecting rod follower hinge shaft can slide along the center line in the left slide groove; the right connecting rod follower hinge shaft is vertically fixedly connected to the right load-bearing slide, and the terminal right connecting rod and the right load-bearing slide are slidingly hinged through the right slide groove, wherein the right connecting rod follower hinge shaft can slide along the center line in the right slide groove.

[0016] The advantages of this utility model compared with the prior art are:

[0017] 1. The utility model meets the track-changing operation requirements of the integral flexible rack rail switch, has a small operating space, low assembly cost, meets the force requirements, and reduces safety risks.

[0018] 2. The single-arm double-link push-pull mechanism including the crank slider of the utility model not only has a small operating space, but also can adapt to rack tracks with different disturbances, while meeting the switching force requirements of the rack track switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a preferred embodiment of the utility model in which the track is in a straightened state;

[0020] Figure 2 This is a schematic diagram of a preferred embodiment of the utility model in a track bending state;

[0021] Figure 3 This is a schematic diagram of the main structure of the electric push rod of the utility model;

[0022] Figure 4 For this utility model Figure 1 、 Figure 2 Schematic diagram of the slider structure in ;

[0023] Figure 5 For this utility model Figure 1 、 Figure 2 Schematic diagram of the crank structure;

[0024] Figure 6 For this utility model Figure 1 、 Figure 2 Schematic diagram of the intermediate connecting rod structure;

[0025] Figure 7 For this utility model Figure 1 、 Figure 2 Schematic diagram of the terminal left connecting rod structure;

[0026] Figure 8 For this utility model Figure 1 、 Figure 2 Schematic diagram of the end right connecting rod structure.

[0027] In the figure: 1-electric push rod, 2-slider, 3-crank, 4-middle connecting rod, 5-end left connecting rod, 6-end right connecting rod, 7-left load-bearing slide, 8-right load-bearing slide, 9-left slide rail, 10-rack rail, 11-right slide rail;

[0028] a1-crank fixed axis, b1-slider hinge axis, c1-crank hinge axis, a2-right connecting rod fixed axis, b2-right connecting rod active hinge axis, c2-right connecting rod follower hinge axis, a3-left connecting rod fixed axis, b3-left connecting rod active hinge axis, c3-left connecting rod follower hinge axis;

[0029] 1.1-Electric push rod cylinder, 1.2-Push rod, 1.3-Front end fish ear; 2.1-Fish ear axis hole, 2.2-Crank shaft hole; 3.1-Crank shaft, 3.2-Crank main arm, 3.3-Crank rotating hole, 3.4-Crank fixing hole; 4.1-Arc-shaped hole, 4.2-Right waist-shaped hole, 4.3-Left waist-shaped hole; 5.1-Left rotating hole, 5.2-Left fixing hole, 5.3-Left slide; 6.1-Right rotating hole, 6.2-Right fixing hole, 6.3-Right slide. DETAILED DESCRIPTION

[0030] The following is a combination of the appended examples of the present invention Figure 1-8 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the embodiments described are only the best embodiments of the present invention, not all embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0031] A single-arm double-link push-pull mechanism for a rack track switch (such as Figure 1 、 Figure 2 The optimal embodiment shown in the figure) comprises a fixed electric push rod 1, which is vertically and parallelly arranged on the outside of the left and right straight slide rails (9, 11) in a vertical state; the push and pull force output by the vertical extension of the electric push rod 1 is used to drive the crank slider mechanism to swing, and the swinging power of the crank slider mechanism passes through the horizontally arranged middle connecting rod 4 and the two end left and right connecting rods (5, 6) arranged in parallel with an inclined interval, and finally pushes the left and right load-bearing slide plates (7, 8) respectively to complete the track changing operation of the rack rail.

[0032] It should be noted that the slider-crank mechanism, as an important mechanical transmission device, can convert between rotational and linear motion. Due to its ease of fabrication and relatively flexible material selection, its overall cost is low. By adjusting the position and size of the slider, the slider-crank mechanism can achieve different reduction ratios to meet diverse motion requirements. Furthermore, its stable motion ensures proper operation, reduces failure rates, and offers excellent stability. The slider-crank mechanism can adapt to varying reduction ratios and motion requirements, thus possessing wide applicability.

[0033] The utility model adopts a single-arm double-link mechanism including a crank slider to realize the switching of the rack track switch, which meets the track changing operation requirements of the overall flexible rack track switch, has a small operating space, low assembly cost, meets the force requirements, and reduces safety risks.

[0034] The single-arm double-link push-pull mechanism including the crank slider not only has a small operating space, but also can adapt to rack rails with different disturbances and meet the switching force requirements of the rack rail switch.

[0035] In the above embodiment: (as Figure 5 (As shown) The crank slider mechanism consists of a crank 3 and a slider 2; the crank 3 is an arc-shaped angled structure; the crank 3 consists of a crank shaft 3.1 and a crank main arm 3.2 with an arc-shaped angle; the slider 2 consists of a fish ear shaft hole 2.1 and a crank shaft hole 2.2.

[0036] It should be noted that the curved angled structure of the crank 3 enables smoother power transmission during movement. This design reduces shock and vibration during movement, thereby improving the stability and reliability of the mechanical system. The curved angled structure of the crank 3 ensures continuous movement, avoiding interruptions or instability caused by structural abrupt changes. The curved angled structure distributes stress more evenly when loaded, thereby increasing the crank's overall strength. This design enables the crank 3 to withstand greater loads and higher operating pressures. Because the curved angled structure reduces stress concentration and fatigue damage, the durability of the crank 3 is significantly improved. This design ensures stable performance over long-term use, reducing the frequency of repair and replacement. The curved angled structure of the crank 3 adapts to a variety of operating environments and conditions, providing stable performance under both high-speed rotation and low-speed, heavy-load conditions. The curved angled structure provides greater flexibility in the design and manufacturing of the crank 3, allowing engineers to adjust the crank's shape, size, and material to meet specific application requirements. The curved angled structure of the crank 3 simplifies manufacturing, reducing manufacturing costs. This design facilitates mass production and automated processing of the crank 3 . Because the curved angled structure allows for more efficient use of materials, the material utilization rate of the crank 3 is improved, which helps reduce production costs and improve economic benefits.

[0037] In the above embodiment: (as Figure 1 、 Figure 2 (As shown) the execution end of the electric push rod 1 is hinged to one end of the slider 2; the other end of the slider 2 is slidably adapted to connect to the input end of the crank 3; the output end of the crank 3 is slidably hinged to the outer input end of the horizontally arranged intermediate connecting rod 4; the innermost end of the intermediate connecting rod 4 is slidably hinged to the upper end of the terminal left connecting rod 5; the middle part of the intermediate connecting rod 4 is slidably hinged to the upper end of the terminal right connecting rod 6; the terminal left connecting rod 5 and the terminal right connecting rod 6 are spaced parallel and inclined to the left and right straight slide rails (9, 11); the lower end of the terminal left connecting rod 5 is slidably hinged to the left load-bearing slide plate 7; the lower end of the terminal right connecting rod 6 is slidably hinged to the right load-bearing slide plate 8; the terminal left connecting rod 5 and the terminal right connecting rod 6 respectively rotate and swing around the middle of their respective connecting rods to complete the track changing operation of the rack rail.

[0038] In any of the foregoing embodiments: (e.g. Figure 3 (As shown) the electric push rod 1 includes an electric push rod cylinder 1.1, a push rod 1.2, and a front fish ear 1.3; the electric push rod cylinder 1.1 is fixed in position, and the push rod 1.2 can be extended and retracted forward and backward along the axis; the front fish ear 1.3 is a ring structure; the front fish ear 1.3 is hinged to the input end of the slider 2.

[0039] In the above embodiment: (as Figure 4 (As shown), the axes of the fish ear shaft hole 2.1 and the crank shaft hole 2.2 intersect vertically in space; and the fish ear shaft hole 2.1 and the crank shaft hole 2.2 are inclined and form a certain angle with the crank 3.

[0040] In the above embodiment: (as Figure 1 、 Figure 2 (As shown) the crank shaft 3.1 serves as the power input end, and its shaft body is slidably adapted to connect the slider 2; the crank main arm 3.2 is provided with a crank fixing hole 3.4 at the corner portion; the power output end of the crank main arm 3.2 is provided with a crank rotating hole 3.3; the front end fish ear 1.3 of the electric push rod 1 is connected to the fish ear shaft hole 2.1 of the slider 2 through the slider hinge shaft b1; the slider 2 is connected to the crank shaft 3.1 through the crank shaft hole 2.2; the crank fixed shaft a1 fixes the rotation center of the crank 3 through the crank fixing hole 3.4, and the crank 3 can rotate around the crank fixed shaft a1.

[0041] It should be noted that the tilted design of crankshaft hole 2.2 helps reduce friction and impact during movement, making the movement between the slider and crank smoother, effectively reducing vibration and noise caused by sudden changes in the motion trajectory, and improving the overall stability of the mechanical system. The angle formed with crank 3 ensures that the slider maintains a continuous motion trajectory during movement, helping to avoid motion interruptions or instability and improving the operating efficiency of the mechanical system. The tilt and angle design of the shaft hole allows the slider to distribute stress more evenly when subjected to load, helping to reduce fatigue damage and failure risks caused by stress concentration and improving the slider's load-bearing capacity. The angle design enhances the slider's overall structural strength, allowing it to maintain stable performance under heavy loads and extend its service life. Furthermore, this design allows the slider to adapt to a variety of different working environments and conditions, providing stable performance whether rotating at high speed or under low speed and heavy loads. The tilt and angle design of the shaft hole provides designers with more design freedom, allowing them to flexibly adjust the layout of the slider and crank according to actual needs to adapt to different application scenarios.

[0042] In any of the foregoing embodiments: (e.g. Figure 6 The middle connecting rod 4 is provided with three holes, which are arc-shaped hole 4.1, right waist-shaped hole 4.2 and left waist-shaped hole 4.3 from the outside to the inside. The three different holes provide the possibility of sliding hinge.

[0043] In the above embodiment: (as Figure 7 As shown) the end left connecting rod 5 is respectively provided with a left rotation hole 5.1, a left fixing hole 5.2, and a left sliding groove 5.3 from top to bottom; (as shown Figure 8 The right connecting rod 6 at the end is respectively provided with a right rotating hole 6.1, a right fixing hole 6.2 and a right sliding groove 6.3 from top to bottom.

[0044] In the above embodiment: (as Figure 5 、 Figure 2 、 Figure 6 (As shown in the figure), the crank rotating hole 3.3 is connected to the arc-shaped hole 4.1 of the intermediate connecting rod 4 through the crank hinge shaft c1, and the left rotating hole 5.1 on the end left connecting rod 5 is connected to the left waist-shaped hole 4.3 of the intermediate connecting rod 4 through the left connecting rod active hinge shaft b3; the right rotating hole 6.1 on the end right connecting rod 6 is connected to the right waist-shaped hole 4.2 of the intermediate connecting rod 4 through the right connecting rod active hinge shaft b2.

[0045] It should be noted that the crank rotation hole 3.3 is connected to the arc-shaped hole 4.1 of the intermediate connecting rod 4 through the crank hinge shaft c1. This connection method allows the crank to rotate within a certain range. At the same time, the design of the arc-shaped hole 4.1 provides additional freedom of movement, so that the crank can rotate smoothly in accordance with the movement trajectory of the mechanism. The left rotation hole 5.1 on the end left connecting rod 5 is connected to the left waist-shaped hole 4.3 of the intermediate connecting rod 4 through the left connecting rod active hinge shaft b3, and the right rotation hole 6.1 on the end right connecting rod 6 is connected to the right waist-shaped hole 4.2 of the intermediate connecting rod 4 through the right connecting rod active hinge shaft b2. This connection method not only allows the end connecting rod to rotate, but also the design of the waist-shaped hole provides sliding freedom along the length direction of the connecting rod. This combination of sliding and rotation allows the end connecting rod to adapt to the movement requirements of the mechanism more flexibly. Furthermore, by distributing the connection points across multiple locations (such as the crankshaft pivot hole, left pivot hole, and right pivot hole), stress can be effectively dispersed, reducing the risk of fatigue damage and failure caused by stress concentration. This connection method allows the mechanism to maintain stable performance even when subjected to large loads, and the connections between the various components are more secure, improving the mechanism's load-bearing capacity. Furthermore, the connection design between the various components simplifies maintenance and replacement, allowing for easy disassembly and reinstallation when repairs or replacements are required.

[0046] In the above embodiment: (as Figure 1 、 Figure 2 、 Figure 7 、 Figure 8 (as shown) the end left link 5 can rotate around the left link fixed axis a3; the end right link 6 can rotate around the right link fixed axis a2; the left link follower hinge shaft c3 is vertically fixedly connected to the left load-bearing slide 7, and the end left link 5 and the left load-bearing slide 7 are slidingly hinged through the left slide groove 5.3, wherein the left link follower hinge shaft c3 can slide along the center line in the left slide groove 5.3; the right link follower hinge shaft c2 is vertically fixedly connected to the right load-bearing slide 8, and the end right link 6 and the right load-bearing slide 8 are slidingly hinged through the right slide groove 6.3, wherein the right link follower hinge shaft c2 can slide along the center line in the right slide groove 6.3.

[0047] It should be noted that the left connecting rod 5 at the end can rotate about the left connecting rod fixed axis a3, and the right connecting rod 6 at the end can rotate about the right connecting rod fixed axis a2. This design allows the connecting rod to rotate freely about the fixed axis, thereby increasing the flexibility and adaptability of the mechanism. Through the rotation of the connecting rod, the mechanism can achieve a wider range of motion to meet different working requirements. This design is particularly important in situations requiring complex motion trajectories. The left connecting rod follower hinge c3 is slidingly hinged to the left load-bearing slide 7 through the left slide 5.3, and the right connecting rod follower hinge c2 is slidingly hinged to the right load-bearing slide 8 through the right slide 6.3. This sliding hinge allows the connecting rod to slide along the slide while rotating, thereby increasing the freedom of movement of the mechanism. The sliding hinge design allows the connecting rod to maintain a continuous motion trajectory during movement, avoiding motion interruption or instability caused by structural mutations. This helps to improve the operating efficiency and stability of the mechanism. The sliding hinge design not only increases the freedom of movement of the mechanism but also helps to disperse stress. When the mechanism is under load, the stress is transferred to the load-bearing slide via the sliding hinge and chute, thereby reducing the concentration of stress on the connecting rod. This effective stress dispersion improves the mechanism's load-bearing capacity. This design is particularly important in situations where heavy loads need to be supported, ensuring that the mechanism maintains stable performance during long-term use. This effective stress dispersion improves the mechanism's load-bearing capacity. This design is particularly important in situations where heavy loads need to be supported, ensuring that the mechanism maintains stable performance during long-term use. The sliding hinge and chute design simplifies the manufacturing process and reduces manufacturing costs. It also facilitates subsequent maintenance and replacement work. When the mechanism requires repair or component replacement, the sliding hinge and chute components can be easily removed and reinstalled. This design improves the mechanism's maintainability and replaceability, reducing maintenance costs and time.

[0048] The working principle of the utility model is as follows: the single-arm double-link mechanism including the crank slider drives the two end left and right connecting rods (5, 6) to swing through an intermediate connecting rod (4) with an arc-shaped hole (41); at the same time, the end left and right connecting rods (5, 6) have left and right sliding grooves (5.3, 6.3), which can ensure that the left and right connecting rod follower hinge shafts (c3, c2) at the end left and right connecting rods (5, 6) can both rotate and freely move along the axis, thereby realizing the same-path swing of the moving parts driven by the two end left and right connecting rod follower hinge shafts (c3, c2) in the structure, i.e., the left and right load-bearing slide plates (7, 8).

[0049] It should be noted that the slot design on the end link ensures that the follower hinge can both rotate and freely move along its axis. This feature enables the left and right load-bearing slides to swing in the same path, meaning they can move along the same path or similar trajectory. Due to the design of the mechanism, the swing path of the load-bearing slide can be precisely controlled by adjusting parameters such as the length of the link, the shape and position of the slot, etc. This helps ensure that the mechanism achieves the desired position and posture during movement. The single-arm, double-link mechanism is relatively compact, reducing the required space. This compactness allows the mechanism to achieve greater functionality within a limited space and improves space utilization. The mechanism's design ensures a short and direct power transmission path, reducing energy loss. This efficient transmission allows the mechanism to achieve significant motion with minimal driving force. The slot and follower hinge design help distribute stress, reducing the risk of structural failure due to stress concentration. This design improves the mechanism's load-bearing capacity, enabling it to withstand greater loads. The mechanism's relatively simple design is easy to manufacture and process, reducing manufacturing costs and improving production efficiency. The various components of the mechanism are tightly connected and easy to disassemble, which facilitates subsequent maintenance and replacement work, thereby reducing maintenance costs and time and improving the reliability and service life of the mechanism.

[0050] (like Figures 1 to 2 State) The specific action process of the present invention is as follows: in the process of changing the straight track into the curved track: the left slide rail 9, the rack rail 10, and the right slide rail 11 of the present invention are bent to the left at the same time. Due to the different deflections, the left load-bearing slide 7 fixed under the left slide rail 9 and the right load-bearing slide 8 fixed under the right slide rail 10 will be dislocated and slipped. The whole process is completed by the single-arm double-link push-pull mechanism in the utility model: first, the electric push rod 1 is started, so that the push rod 1.2 is slowly extended upward, and the front fish ear 1.3 drives the slider 2 to move upward. Due to the effect of constraint, the slider 2 rotates on the front fish ear 1.3 and moves on the crank shaft 3.1, while pushing the crank 3 to rotate around the crank fixed axis a1. At this time, the crank main arm 3.2 pushes the middle link 4 to move to the left through the crank hinge shaft c1, and the middle link 4 pushes the end left link 5 to rotate around the left link fixed axis a3 through the left link active hinge shaft b3. Finally, the end left link 5 drives the left bearing slide plate 7 to rotate through the left link follower hinge shaft c3; the left bearing slide plate 7 and the left slide rail 9 are relatively fixed, so the left bearing slide plate 7 and the left slide rail 9 will bend along the curved arc path of the left slide rail 9.

[0051] Furthermore, during the transition from straight track to curved track, the left connecting rod 5 and the left load-bearing slide 7 at the end are load-bearing components, while the right connecting rod 6 and the right load-bearing slide 8 at the end act as passive components, moving as the right slide 11 bends. When the transition from straight track to curved track is complete, the output thrust of the electric push rod 1 reaches its maximum. The left connecting rod follower hinge c3 and the right connecting rod follower hinge c2 move within the left and right slide grooves 5.3 and 6.3, respectively, with different distances of movement. This causes the originally parallel left and right connecting rods 5 and 6 to create a small angle, the middle connecting rod 4 to swing at a small angle, and the crank hinge c1 to slide within the arc-shaped hole 4.1.

[0052] (like Figure 2 to Figure 1 As shown) When changing from curved track to straight track: the operation of changing from curved track to straight track is Figure 2 The status shown changes to Figure 1 In the state shown, during this process, the left slide rail 9, the rack rail 10, and the right slide rail 11 are straightened from the bent state at the same time, and the corresponding left load-bearing slide plate 7 and the right load-bearing slide plate 8 are returned to the flush state from the misaligned state. The whole process is completed by the single-arm double-link push-pull mechanism in the utility model: first, the electric push rod 1 is started, so that the push rod 1.2 is slowly retracted downward, and the front fish ear 1.3 drives the slider 2 to move downward. The slider 2 moves on the crank shaft 3.1 and pulls the crank 3 to rotate in the opposite direction around the crank fixed axis a1. At this time, the crank main arm 3.2 pulls the middle link 4 to the right through the crank hinge shaft c1, and the middle link 4 pushes the end right link 6 to rotate around the right link fixed axis a2 through the right link active hinge shaft b2. Finally, the end right link 6 drives the right bearing slide 8 to rotate through the right link follower hinge shaft c2. The right bearing slide 8 and the right slide rail 11 are relatively fixed. Therefore, the right bearing slide 8 and the right slide rail 11 will return to a straight state from a bent state along the curved arc path of the right slide rail. Figure 1 .

[0053] In addition, during the process of the curved track becoming a straight track, the end right connecting rod 6 and the right load-bearing slide 8 become load-bearing parts, and the end left connecting rod 5 and the left load-bearing slide 7 act as passive parts and move as the left slide rail 9 returns to straightness.

[0054] Not only that: the single-arm double-link push-pull mechanism in the utility model can realize the movement of different circular arc paths of the single-arm push double-link by changing the length of the arc hole 4.1, the right waist-shaped hole 4.2 and the left waist-shaped hole 4.3 of the middle link 4, as well as the length of the left slide groove 5.3 and the right slide groove 6.3, so as to adapt to rack tracks with different disturbances.

[0055] It should be understood that although this specification is described according to one embodiment, this embodiment does not only include one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in this embodiment can also be appropriately arranged and combined to form other embodiments that can be understood by those skilled in the art.

[0056] The above preferred embodiments are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention. It should be noted that the components and materials used in the above embodiments are commercially available unless otherwise specified.

Claims

1. A single-arm double-link push-pull mechanism for a rack track switch, characterized by: The invention comprises an electric push rod (1) with a fixed position, wherein the electric push rod (1) is arranged vertically and parallel to the outside of left and right straight slide rails (9, 11) in a vertical state; the push-pull force output by the vertical extension and contraction of the electric push rod (1) drives the crank slider mechanism to swing; the swinging power of the crank slider mechanism passes through a horizontally arranged middle connecting rod (4) and two end left and right connecting rods (5, 6) arranged parallel to each other with an inclined interval, and finally pushes the left and right load-bearing slide plates (7, 8) respectively to complete the track changing operation of the rack rail.

2. The single-arm double-link push-pull mechanism for a rack track switch according to claim 1, characterized in that: The crank slider mechanism consists of a crank (3) and a slider (2); the crank (3) is an arc-shaped angled structure; the crank (3) consists of a crank shaft (3.1) and an angled crank main arm (3.2); the slider (2) consists of a fish ear shaft hole (2.1) and a crank shaft hole (2.2).

3. The single-arm double-link push-pull mechanism for a rack track switch according to claim 1, characterized in that: The execution end of the electric push rod (1) is hinged to one end of the slider (2); the other end of the slider (2) is slidingly adapted to be connected to the input end of the crank (3); the output end of the crank (3) is slidingly hinged to the outer input end of the horizontally arranged intermediate connecting rod (4); the innermost end of the intermediate connecting rod (4) is slidingly hinged to the upper end of the terminal left connecting rod (5); the middle part of the intermediate connecting rod (4) is slidingly hinged to the upper end of the terminal right connecting rod (6); the terminal left connecting rod (5) and the terminal right connecting rod (6) are spaced apart, parallel and inclined to the left and right straight slide rails (9, 11); the lower end of the terminal left connecting rod (5) is slidingly hinged to the left load-bearing slide plate (7); the lower end of the terminal right connecting rod (6) is slidingly hinged to the right load-bearing slide plate (8); the terminal left connecting rod (5) and the terminal right connecting rod (6) respectively rotate and swing around the middle of their respective connecting rods to complete the track change operation of the rack rail.

4. The single-arm double-link push-pull mechanism for a rack track switch according to claim 1 or 3, characterized in that: The electric push rod (1) comprises an electric push rod cylinder (1.1), a push rod (1.2), and a front end lug (1.3); the electric push rod cylinder (1.1) is fixed in position, and the push rod (1.2) can be extended and retracted forward and backward along an axis; the front end lug (1.3) is an annular structure; and the front end lug (1.3) is hinged to the input end of a slider (2).

5. The single-arm double-link push-pull mechanism for a rack track switch according to claim 2, characterized in that: The axes of the trunnion hole (2.1) and the crankshaft hole (2.2) intersect vertically in space; and the trunnion hole (2.1) and the crankshaft hole (2.2) are arranged obliquely and form a certain angle with the crank (3).

6. The single-arm double-link push-pull mechanism for a rack track switch according to claim 2, characterized in that: The crankshaft (3.1) serves as a power input end, and its shaft body is slidably adapted to connect with the slider (2); a crank fixing hole (3.4) is formed at the corner of the crank main arm (3.2); a crank rotation hole (3.3) is formed at the power output end of the crank main arm (3.2); the front end fish ear (1.3) of the electric push rod (1) is connected to the fish ear shaft hole (2.1) of the slider (2) through the slider hinge shaft (b1); the slider (2) is connected to the crankshaft (3.1) through the crank shaft hole (2.2); the crank fixing shaft (a1) fixes the rotation center of the crank (3) through the crank fixing hole (3.4), and the crank (3) can rotate around the crank fixing shaft (a1).

7. The single-arm double-link push-pull mechanism for a rack track switch according to claim 1 or 3, characterized in that: The middle connecting rod (4) is formed with three holes, which are respectively an arc-shaped hole (4.1), a right waist-shaped hole (4.2), and a left waist-shaped hole (4.3) from the outside to the inside.

8. The single-arm double-link push-pull mechanism for a rack track switch according to claim 3, characterized in that: The terminal left connecting rod (5) is respectively provided with a left rotating hole (5.1), a left fixing hole (5.2), and a left sliding groove (5.3) from top to bottom; the terminal right connecting rod (6) is respectively provided with a right rotating hole (6.1), a right fixing hole (6.2), and a right sliding groove (6.3) from top to bottom.

9. The single-arm double-link push-pull mechanism for a rack track switch according to claim 6, characterized in that: The crank rotating hole (3.3) is connected to the arc-shaped hole (4.1) of the middle connecting rod (4) through a crank hinge shaft (c1); the left rotating hole (5.1) on the end left connecting rod (5) is connected to the left waist-shaped hole (4.3) of the middle connecting rod (4) through a left connecting rod active hinge shaft (b3); and the right rotating hole (6.1) on the end right connecting rod (6) is connected to the right waist-shaped hole (4.2) of the middle connecting rod (4) through a right connecting rod active hinge shaft (b2).

10. The single-arm double-link push-pull mechanism for a rack track switch according to claim 3, 8 or 9, characterized in that: The end left connecting rod (5) can rotate around the left connecting rod fixed axis (a3); the end right connecting rod (6) can rotate around the right connecting rod fixed axis (a2); the left connecting rod follower hinge shaft (c3) is vertically fixedly connected to the left load-bearing slide plate (7), and the end left connecting rod (5) and the left load-bearing slide plate (7) are slidingly hinged through the left sliding groove (5.3), wherein the left connecting rod follower hinge shaft (c3) can slide along the center line in the left sliding groove (5.3); the right connecting rod follower hinge shaft (c2) is vertically fixedly connected to the right load-bearing slide plate (8), and the end right connecting rod (6) and the right load-bearing slide plate (8) are slidingly hinged through the right sliding groove (6.3), wherein the right connecting rod follower hinge shaft (c2) can slide along the center line in the right sliding groove (6.3).

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