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 invention belongs to the technical field of railway switches, and in particular relates to a single-arm double-link push-pull mechanism for a rack track switch. Background Art

[0002] The rack railway places another rack-like track on the sleeper in the middle of the ordinary slide rail, so that the locomotive can overcome the problem of insufficient adhesion and climb the steep slope. Therefore, the rack turnout is a key component used to complete the rack rail switching task.

[0003] In the existing technology, rack turnouts can be divided into integral swing rack turnouts and integral flexible rack turnouts. Among them, the turnout swing assembly of the integral swing rack turnout is an integral fixed type, the turnout switching force is large, the movable rail switching stress is large, and the turnout fatigue life is low. The integral flexible rack turnout is relatively conducive to reducing the turnout switching force, thereby increasing the turnout fatigue life, because the slide rail and the rack rail can be separated and bent.

[0004] In this regard, in order to design a new integral flexible rack rail switch and 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. Summary of the invention

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

[0006] The technical solution adopted by the present invention is: a single-arm double-link push-pull mechanism for a rack rail switch, comprising a fixed-position electric push rod, 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 of the electric push rod drives the crank slider mechanism to swing, and the swinging power of the crank slider mechanism passes through a horizontally arranged middle connecting rod and two end left and right connecting rods arranged in parallel at an inclined interval, and finally pushes the left and right load-bearing slide plates respectively to complete the track changing operation of the rack rail.

[0007] In the above technical solution: the crank slider mechanism consists of a crank and a slider; the crank is an arc-shaped angle 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 scheme: 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 be connected to the crank input end; the crank output end is slidably hinged to the outer input end of the horizontally arranged intermediate connecting rod; the farthest end inside the intermediate connecting rod is slidably hinged to the upper end of the terminal left connecting rod; the middle part of the intermediate connecting rod is slidably hinged to the upper end of the terminal right connecting rod; the terminal left connecting rod and the terminal right connecting rod are spaced parallel and inclined on the left and right straight slide rails; the lower end of the terminal left connecting rod is slidably hinged to the left load-bearing slide plate; the lower end of the terminal right connecting rod is slidably hinged to the right load-bearing slide plate; the terminal left connecting rod and the terminal 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-mentioned 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 an annular structure; the front end fish ear is hinged to the input end of the slider.

[0010] In the above technical solution: the axial spaces of the fish ear shaft hole and the crank shaft hole are vertically intersecting; and the fish ear shaft hole and the crank shaft hole are inclinedly arranged and form a certain angle with the crank.

[0011] In the above-mentioned technical scheme: 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-mentioned 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 scheme: 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 scheme: 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 plate, and the terminal left connecting rod and the left load-bearing slide plate 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 plate, and the terminal right connecting rod and the right load-bearing slide plate 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 the present invention compared with the prior art are:

[0017] 1. The present invention meets the track-changing operation requirements of the integrally 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 present invention 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 turnout. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a preferred embodiment of the present invention when the track is in a straightened state;

[0020] Figure 2 It is a schematic diagram of a preferred embodiment of the present invention when the track is in a curved state;

[0021] Figure 3 It is a schematic diagram of the main structure of the electric push rod of the present invention;

[0022] Figure 4 For the present invention Figure 1 , Figure 2 Schematic diagram of the slider structure in ;

[0023] Figure 5 For the present invention Figure 1 , Figure 2 Schematic diagram of the crank structure;

[0024] Figure 6 For the present invention Figure 1 , Figure 2 Schematic diagram of the structure of the intermediate connecting rod;

[0025] Figure 7 For the present invention Figure 1 , Figure 2 Schematic diagram of the structure of the terminal left connecting rod;

[0026] Figure 8 For the present invention 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 plate, 8-right load-bearing slide plate, 9-left slide rail, 10-tooth 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 shaft 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 hole, 4.2-right waist-shaped hole, 4.3-left waist-shaped hole; 5.1-left rotating hole, 5.2-left fixed hole, 5.3-left slide; 6.1-right rotating hole, 6.2-right fixed hole, 6.3-right slide. DETAILED DESCRIPTION

[0030] The following will be combined with the attached embodiment of the present invention Figure 1-8 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only the best embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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 outer sides of the left and right straight slide rails (9, 11) in a vertical state; the push-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 sliding 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 realize the conversion between rotational motion and linear motion. Due to its simple processing and relatively flexible material selection, the overall cost is low. By adjusting the position and size of the slider, the slider crank mechanism can achieve different reduction ratios to meet different motion requirements. In addition, the slider crank mechanism has stable movement, which can ensure the normal operation of the mechanism, reduce the failure rate, and has good stability. The slider crank mechanism can adapt to different reduction ratios and motion requirements, so it has a wide range of applicability.

[0033] The present invention 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 integral 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-connecting rod push-pull mechanism including the crank slider of the present invention not only has a small operating space, but also can adapt to rack tracks with different disturbances and meet the switching force requirements of the rack turnout.

[0035] In the above embodiment: (such as Figure 5 (As shown in the figure) the crank slider mechanism consists of a crank 3 and a slider 2; the crank 3 is an arc-shaped angle 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] Among them, it should be noted that the crank 3 with an arc-shaped angle structure enables the crank to transmit power more smoothly during movement. This design reduces the impact and vibration during movement, thereby improving the stability and reliability of the mechanical system. The crank 3 with an arc-shaped angle structure can ensure the continuity of movement and avoid the interruption or instability of movement caused by structural mutation. The design of the arc-shaped angle structure enables the crank 3 to distribute stress more evenly when bearing loads, thereby improving the overall strength of the crank. This design enables the crank 3 to withstand greater loads and higher working pressures. Since the arc-shaped angle structure can reduce stress concentration and fatigue damage, the durability of the crank 3 is significantly improved. This design enables the crank to maintain stable performance during long-term use and reduces the frequency of maintenance and replacement. The crank 3 with an arc-shaped angle structure can adapt to a variety of different working environments and conditions. Whether it is high-speed rotation or low-speed heavy load, this crank 3 can provide stable performance. The design of the arc-shaped angle structure gives the crank 3 higher flexibility in the design and manufacturing process. Engineers can adjust the shape, size and material of the crank according to actual needs to meet specific application requirements. The crank 3 with an arc-shaped angle structure is relatively simple in the processing process, which reduces the manufacturing cost. This design makes it easier to achieve mass production and automatic processing of the crank 3. Since the arc-shaped angle structure can make more reasonable use of materials, the material utilization rate of the crank 3 is improved, which helps to reduce production costs and improve economic benefits.

[0037] In the above embodiment: (such as Figure 1 , Figure 2 (as shown in the figure) 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 be connected 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 intermediate connecting rod 4 arranged horizontally; the inner farthest 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: Figure 3 (as shown) the electric push rod 1 comprises an electric push rod cylinder 1.1, a push rod 1.2, and a front end 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 end fish ear 1.3 is a ring structure; the front end fish ear 1.3 is hinged to the input end of the slider 2.

[0039] In the above embodiments: Figure 4 As shown in the figure, the axial spaces of the fish ear shaft hole 2.1 and the crank shaft hole 2.2 intersect vertically; and the fish ear shaft hole 2.1 and the crank shaft hole 2.2 are inclinedly arranged and form a certain angle with the crank 3.

[0040] In the above embodiments: 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; 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 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.

[0041] It should be noted that the tilted setting of the crank shaft hole 2.2 helps to reduce friction and impact during movement, making the movement between the slider and the crank smoother, effectively reducing vibration and noise caused by sudden changes in the movement trajectory, and improving the overall stability of the mechanical system. Forming a certain angle with the crank 3 ensures that the slider can maintain a continuous movement trajectory during movement, helps to avoid movement interruption or instability, and improves the operating efficiency of the mechanical system. The tilt and angle design of the shaft hole enables the slider to distribute stress more evenly when bearing load, helps to reduce fatigue damage and failure risks caused by stress concentration, and improves the bearing capacity of the slider. The angle design enhances the overall structural strength of the slider. When bearing a large load, the slider can maintain stable performance and extend its service life. Furthermore, this design enables the slider to adapt to a variety of different working environments and conditions. Whether it is high-speed rotation or low-speed heavy load, the slider can provide stable performance. The tilt and angle design of the shaft hole provides designers with more design freedom, and the layout of the slider and crank can be flexibly adjusted according to actual needs to adapt to different application scenarios.

[0042] In any of the foregoing embodiments: Figure 6 The intermediate 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 for sliding hinge.

[0043] In the above embodiments: Figure 7 The left connecting rod 5 at the end 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; (as shown in 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 embodiments: Figure 5 , Figure 2 , Figure 6 As shown in the figure, the crank rotating hole 3.3 is connected to the arc hole 4.1 of the middle connecting rod 4 through the 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 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 middle 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 hole 4.1 of the intermediate connecting rod 4 through the crank hinge axis c1. This connection method allows the crank to rotate within a certain range, and the design of the arc hole 4.1 provides additional freedom of movement, so that the crank can smoothly rotate 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 axis 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 axis 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 more flexibly adapt to the movement requirements of the mechanism. Furthermore, by distributing the connection points in multiple locations (such as the crank rotation hole, left rotation hole, right rotation hole, etc.), the stress can be effectively dispersed to reduce the risk of fatigue damage and failure caused by stress concentration. This connection method allows the mechanism to maintain stable performance when subjected to large loads, and the connection between the various components is more secure, which improves the load-bearing capacity of the mechanism. In addition, the connection design between the various components makes maintenance and replacement easier, and when parts need to be repaired or replaced, they can be easily disassembled and reinstalled.

[0046] In the above embodiment: (such as Figure 1 , Figure 2 , Figure 7 , Figure 8 As shown in the figure, the terminal left connecting rod 5 can rotate around the left connecting rod fixed axis a3; the terminal 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 terminal left connecting rod 5 and the left load-bearing slide plate 7 are slidingly hinged through the left slide groove 53, wherein the left connecting rod follower hinge shaft c3 can slide along the center line in the left slide 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 terminal right connecting rod 6 and the right load-bearing slide plate 8 are slidingly hinged through the right slide groove 6.3, wherein the right connecting rod follower hinge shaft c2 can slide along the center line in the right slide groove 6.3.

[0047] It should be noted that the end left connecting rod 5 can rotate around the left connecting rod fixed axis a3, and the end right connecting rod 6 can rotate around the right connecting rod fixed axis a2. This design allows the connecting rod to rotate freely around the fixed axis, thereby increasing the movement 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 work requirements. This design is particularly important in situations where complex motion trajectories are required. The left connecting rod follower hinge c3 is slidingly hinged with the left load-bearing slide 7 through the left slide 5.3, and the right connecting rod follower hinge c2 is slidingly hinged with the right load-bearing slide 8 through the right slide 6.3. This sliding hinge method allows the connecting rod to slide along the slide while rotating, thereby increasing the freedom of movement of the mechanism. The design of the sliding hinge enables the connecting rod to maintain a continuous motion trajectory during the movement, avoiding motion interruption or instability caused by structural mutations. This helps to improve the operating efficiency and stability of the mechanism. The design of the sliding hinge not only increases the freedom of movement of the mechanism, but also helps to disperse stress. When the mechanism is under load, the stress can be transferred to the load-bearing slide plate through the sliding hinge and the slide slot, thereby reducing the concentration of force on the connecting rod. Since the stress is effectively dispersed, the bearing capacity of the mechanism is improved. This design is particularly important in situations where large loads need to be borne, and it can ensure that the mechanism maintains stable performance during long-term use. Since the stress is effectively dispersed, the bearing capacity of the mechanism is improved. This design is particularly important in situations where large loads need to be borne, and it can ensure that the mechanism maintains stable performance during long-term use. The design of the sliding hinge and the slide slot simplifies the manufacturing process and reduces the manufacturing cost. At the same time, this design is also convenient for subsequent maintenance and replacement work. When the mechanism needs to be repaired or parts are replaced, the sliding hinge and slide slot parts can be easily removed and reinstalled. This design improves the maintainability and replaceability of the mechanism and reduces maintenance costs and time.

[0048] The working principle of the present invention 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) structure, and 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 design of the slide groove on the end link ensures that the follower hinge can both rotate and move freely along the axis. This feature enables the left and right load-bearing slide plates to swing along the same path, that is, both can move along the same path or similar trajectory. Due to the design of the mechanism, the swing path of the load-bearing slide plate can be precisely controlled by adjusting parameters such as the length of the connecting rod, the shape and position of the slide groove. This helps to ensure that the mechanism can reach the expected position and posture during movement. The design of the single-arm double-link mechanism is relatively compact, which reduces the required space. This compactness enables the mechanism to play a greater role in a limited space and improves space utilization. Due to the design of the mechanism, the power transmission path is short and direct, which reduces energy loss. This efficient transmission characteristic enables the mechanism to achieve a greater movement effect with a smaller driving force. The design of the slide groove and the follower hinge shaft helps to disperse stress and reduce the risk of structural failure caused by stress concentration. This design improves the bearing capacity of the mechanism and enables it to withstand a larger load. The design of such a mechanism is relatively simple and easy to manufacture and process. This reduces manufacturing costs and improves production efficiency. The various components of the mechanism are tightly connected and easy to disassemble, which is convenient for subsequent maintenance and replacement, which reduces maintenance costs and time and improves the reliability and service life of the mechanism.

[0050] (like Figure 1 to Figure 2 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 side at the same time. Due to the different deflections, the left load-bearing slide plate 7 fixed under the left slide rail 9 and the right load-bearing slide plate 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 of the present invention: first, the electric push rod 1 is started to make the push rod 1.2 slowly extend upward, and the front fish ear 1.3 drives the slider 2 to move upward. Due to the 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 connecting rod 4 to move left through the crank hinge shaft c1, and the middle connecting rod 4 pushes the end left connecting rod 5 to rotate around the left connecting rod fixed axis a3 through the left connecting rod active hinge shaft b3. Finally, the end left connecting rod 5 drives the left load-bearing slide plate 7 to rotate through the left connecting rod follower hinge shaft c3; the left load-bearing slide plate 7 and the left slide rail 9 are relatively fixed, so the left load-bearing slide plate 7 and the left slide rail 9 will bend along the curved arc path of the left slide rail 9.

[0051] In addition, during the process of changing the straight track to the curved track: the left connecting rod 5 and the left load-bearing slide 7 at the end are load-bearing parts, and the right connecting rod 6 and the right load-bearing slide 8 at the end are passive parts, which move with the bending of the right slide rail 11. When the straight track is changed to the curved track, the output thrust of the electric push rod 1 reaches the maximum. The left connecting rod follower hinge shaft c3 and the right connecting rod follower hinge shaft c2 will move in the left slide groove 5.3 and the right slide groove 6.3 respectively, and the moving distances are different, causing the originally parallel end left connecting rod 5 and the end right connecting rod 6 to have a small angle, the middle connecting rod 4 to swing at a small angle, and the crank hinge shaft c1 to slide in the arc hole 4.1.

[0052] (like Figure 2 to Figure 1 When changing from a curved track to a straight track: 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 of the present invention: first, the electric push rod 1 is started to slowly retract the push rod 1.2 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 connecting rod 4 to move rightward through the crank hinge shaft c1, and the middle connecting rod 4 pushes the terminal right connecting rod 6 to rotate around the right connecting rod fixed axis a2 through the right connecting rod active hinge shaft b2. Finally, the terminal right connecting rod 6 drives the right load-bearing slide plate 8 to rotate through the right connecting rod follower hinge shaft c2. The right load-bearing slide plate 8 and the right slide rail 11 are relatively fixed, so the right load-bearing slide plate 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] Moreover, the single-arm double-link push-pull mechanism of the present invention can realize the movement of the single-arm double-link along different arc paths 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 the present specification is described according to an implementation method, the implementation method does not only include an 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 implementation methods 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, so all 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 in that: The invention comprises a fixed electric push rod (1), which is arranged vertically and in parallel on the outside of left and right straight slide rails (9, 11) in a vertical state; the push-pull force output by the vertical extension of the electric push rod (1) drives a 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 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.

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

3. According to claim 1, the single-arm double-link push-pull mechanism for a rack track switch is characterized in that: The execution end of the electric push rod (1) is hinged to one end of a slider (2); the other end of the slider (2) is slidably adapted to be connected to the input end of a crank (3); the output end of the crank (3) is slidably hinged to the outer input end of a horizontally arranged intermediate connecting rod (4); the innermost end of the intermediate connecting rod (4) is slidably hinged to the upper end of a terminal left connecting rod (5); the middle part of the intermediate connecting rod (4) is slidably hinged to the upper end of a 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 slidably hinged to a left load-bearing slide plate (7); the lower end of the terminal right connecting rod (6) is slidably hinged to a 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 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 an axis; the front end fish ear (1.3) is an annular structure; and the front end fish ear (1.3) is hinged to the input end of the 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 shaft hole (2.1) and the crank shaft hole (2.2) intersect vertically in space; and the trunnion shaft hole (2.1) and the crank shaft 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 crank shaft (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 a slider hinge shaft (b1); the slider (2) is connected to the crank shaft (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 provided 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 end 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 end 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 rotation hole (3.3) is connected to the arc-shaped hole (4.1) of the middle connecting rod (4) through the crank hinge shaft (c1); 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 middle connecting rod (4) through the left connecting rod active hinge shaft (b3); 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 middle connecting rod (4) through the 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 (53), 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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