A track beam

Abstract

The present application discloses a track beam, which is used in the technical field of monorail crane systems, and includes a first straight rail and a second straight rail, a middle straight rail is provided between the two, the distance between the first straight rail and the second straight rail is greater than the length of the middle straight rail, and a reserved gap is formed between the first straight rail and the middle straight rail and / or between the second straight rail and the middle straight rail to absorb the deformation of the track beam. The upper side and the lower side of the first straight rail, the middle straight rail and the second straight rail are movably connected by a connecting mechanism, and the connecting mechanism includes a connecting block fixedly connected to the first straight rail, the middle straight rail and the second straight rail respectively, and a guide portion that movably connects the connecting block. The track beam usually undergoes two kinds of deformation, compression or tension. There is a reserved gap in the track beam. When compression deformation occurs, the width of the reserved gap is reduced; when tension deformation occurs, the width of the reserved gap is increased, thereby absorbing the deformation, ensuring the normal operation of the monorail crane locomotive, and improving the safety of the track beam.

Description

Technical Field

[0001] The present application relates to the technical field of monorail hanging track systems, and in particular to a track beam. Background Art

[0002] The track line of the mining monorail crane locomotive is composed of a large number of standard-length I-beam track beams connected in sequence. Two adjacent track beams are firmly connected with fasteners, and the fasteners are then fixed to the tunnel roof by chain hanging. When the tunnel mine pressure changes and the roof is deformed and displaced, the track line will be twisted and displaced accordingly, and the adjacent track beams will be squeezed or stretched against each other. When the track beam cannot adapt to the deformation and displacement of the roof by changing the length of the beam body or the angle of the fastener connection, bending deformation or tensile damage will occur. The deformation and damage of the track beam will pose a serious safety hazard, and the maintenance and replacement of the track beam is time-consuming and labor-intensive.

[0003] Therefore, how to provide a technical solution that can solve the above problems is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The purpose of the present application is to provide a track beam, which movably connects a first straight rail, a second straight rail and a middle straight rail through a connecting mechanism. The movement of the first straight rail, the second straight rail and the middle straight rail can absorb deformation, thereby ensuring the normal use of the track beam and improving the safety of the track beam.

[0005] To achieve the above-mentioned purpose, the present application provides a track beam, comprising a first straight rail, a second straight rail and a middle straight rail located therebetween, the distance between the first straight rail and the second straight rail being greater than the length of the middle straight rail, a reserved gap for absorbing deformation of the track beam is formed between the first straight rail and the middle straight rail and / or between the second straight rail and the middle straight rail, the upper sides and lower sides of the first straight rail, the middle straight rail and the second straight rail are movably connected by a connecting mechanism, the connecting mechanism comprising a connecting block fixedly connected to the first straight rail, the middle straight rail and the second straight rail and a guide portion for movably connecting the connecting block.

[0006] In some embodiments, the connecting mechanism includes an upper connecting mechanism and a lower connecting mechanism, which are respectively arranged on the upper and lower sides of the first straight rail, the middle straight rail and the second straight rail. The upper connecting mechanism includes an upper guide portion, and the upper connecting mechanism also includes an elastic member that cooperates with the upper guide portion and the connecting block to elastically support the middle straight rail in the length direction.

[0007] In some embodiments, the upper connecting mechanism includes a first upper connecting block fixed to the upper side of the first straight rail, an upper middle connecting block fixed to the upper side of the middle straight rail, and a second upper connecting block fixed to the upper side of the second straight rail. The guiding portion in the upper connecting mechanism is an upper through shaft. The first upper connecting block has a first upper connecting hole, the second upper connecting block has a second upper connecting hole, and the upper middle connecting block has an upper middle connecting hole. One end of the upper through shaft is provided with a shaft cap, and the other end is provided with an external thread. The upper through shaft is inserted into the first upper connecting hole, the upper middle connecting hole and the second upper connecting hole, and is connected to the upper connecting nut to connect the first upper connecting block, the second upper connecting block and the upper middle connecting block.

[0008] In some embodiments, the lower connecting mechanism includes a first lower connecting block fixed to the lower side of the first straight rail, a second lower connecting block fixed to the lower side of the second straight rail, and a lower middle section connecting block fixed to the lower side of the middle straight rail. The guiding portion in the lower connecting mechanism is a lower through shaft. The first lower connecting block, the second lower connecting block and the lower middle section connecting block are all provided with lower connecting holes. The lower through shaft is inserted into the lower connecting holes of the first lower connecting block, the lower middle section connecting block and the second lower connecting block, and is connected to the lower connecting nut. The distance between the lower connecting nut and the shaft cap of the lower through shaft is greater than the sum of the lengths of the first lower connecting block, the lower middle section connecting block and the second lower connecting block.

[0009] In some embodiments, the diameters of the first upper connecting hole, the upper middle connecting hole and the second upper connecting hole are all larger than the diameter of the upper through shaft. A limiting ring is provided in the middle of the upper middle connecting hole, and the upper through shaft passes through the inner hole of the limiting ring. The upper connecting mechanism also includes a guide sleeve, which is arranged on the outer periphery of the upper through shaft. Guide sleeves are provided on both sides of the limiting ring, and the first upper connecting hole, the upper middle connecting hole and the second upper connecting hole are all loosely matched with the guide sleeves.

[0010] In some embodiments, the inner hole of the limit ring has an internal thread, the middle part of the upper through shaft has an external thread, the limit ring is connected to the middle part of the upper through shaft, a limit groove is provided in the first upper connecting hole, the bottom of the limit groove is a limit surface facing away from the middle straight rail, a limit ring is provided in the limit groove and is fitted with the limit surface, the elastic part includes a first spring part and a second spring part, the first spring part is located between the limit ring and the shaft cap of the upper through shaft and is used to push the middle straight rail to fit with the first straight rail, the reserved gap is located between the middle straight rail and the second straight rail, and the second spring part is located between the upper connecting nut and the guide sleeve in the second upper connecting hole.

[0011] In some embodiments, the limiting ring is clearance-matched with the upper through shaft, the elastic member includes a first spring member and a second spring member, the first spring member is located between the shaft cap of the upper through shaft and the guide sleeve in the first upper connecting hole, the second spring member is located between the upper connecting nut and the guide sleeve in the second upper connecting hole, and there are reserved gaps between the first straight rail and the middle straight rail and between the middle straight rail and the second straight rail.

[0012] In some embodiments, a first preset angle is formed between the reserved gap and the lower side of the middle straight rail, and the first preset angle is an acute angle.

[0013] In some embodiments, a second preset angle is formed between the reserved gap and a vertical plane parallel to the width direction of the middle straight rail, and the second preset angle is an acute angle.

[0014] In some embodiments, there are two middle straight rails and two second straight rails, and the two middle straight rails and the two second straight rails are symmetrically distributed about the center line of the first straight rail.

[0015] The track beam provided by the present application includes a first straight rail and a second straight rail, a middle straight rail is arranged between the two, the distance between the first straight rail and the second straight rail is greater than the width of the middle straight rail, a reserved gap for absorbing deformation of the track beam is formed between the first straight rail and the middle straight rail and / or between the second straight rail and the middle straight rail, the upper side and the lower side of the first straight rail, the middle straight rail and the second straight rail are all movably connected by a connecting mechanism, and a set of connecting mechanisms includes three connecting blocks fixedly connected to the first straight rail, the middle straight rail and the second straight rail respectively, and a guide portion for movably connecting the three connecting blocks.

[0016] The first straight rail, the middle straight rail and the second straight rail can move along the guide part. The track beam usually undergoes two kinds of deformation, compression or tension. There is a reserved gap in the track beam. When compression deformation occurs, the width of the reserved gap decreases; when tension deformation occurs, the width of the reserved gap increases, thereby absorbing the deformation, eliminating part of the load, ensuring the normal operation of the monorail crane, and improving the safety of the track beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a specific implementation of the track beam provided in this application;

[0019] Figure 2 for Figure 1 A structural schematic diagram of a connection method of the first fixed straight rail, the middle straight rail and the second fixed straight rail;

[0020] Figure 3 for Figure 1 A structural schematic diagram of another connection method of the first fixed straight rail, the middle straight rail and the second fixed straight rail.

[0021] in, Figures 1 to 3 The reference numerals in the drawings are:

[0022] The first straight rail 1, the middle straight rail 2, the second straight rail 3, the upper through shaft 4, the lower through shaft 5, the guide sleeve 6, the first spring member 7, the second spring member 8, the upper connecting nut 9, the lower connecting nut 10, and the protective end cover 11. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Please refer to Figures 1 to 3 , Figure 1 A schematic structural diagram of a specific implementation of the track beam provided in this application; Figure 2 for Figure 1 A structural schematic diagram of a connection method of the first fixed straight rail, the middle straight rail and the second fixed straight rail; Figure 3 for Figure 1 A structural schematic diagram of another connection method of the first fixed straight rail, the middle straight rail and the second fixed straight rail.

[0026] The track beam provided in this application has a structure as follows Figure 1 As shown, it includes a first straight rail 1, a middle straight rail 2 and a second straight rail 3. The middle straight rail 2 is located between the first straight rail 1 and the second straight rail 3, and the three are movably connected by an upper connecting mechanism and a lower connecting mechanism. The distance between the first straight rail 1 and the second straight rail 3 is greater than the length of the middle straight rail 2, so after the middle straight rail 2 is installed, a reserved gap will be formed between the first straight rail 1 and the second straight rail 3. The reserved gap can be located between the first straight rail 1 and the middle straight rail 2 and / or between the second straight rail 3 and the middle straight rail 2.

[0027] The first straight rail 1, the middle straight rail 2 and the second straight rail 3 are connected by a connecting mechanism. The connecting mechanism includes an upper connecting mechanism and a lower connecting mechanism, which are respectively arranged on the upper side and the lower side of the first straight rail 1, the middle straight rail 2 and the second straight rail 3. The upper connecting mechanism includes a first upper connecting block, an upper middle connecting block, a second upper connecting block and an upper guide. The first upper connecting block is fixed on the upper side of the first straight rail 1, the upper middle connecting block is fixed on the upper side of the middle straight rail 2, and the second upper connecting block is fixed on the upper side of the second straight rail 3. The upper guide is arranged parallel to the length direction of the middle straight rail 2, and the first upper connecting block, the upper middle connecting block and the second upper connecting block are connected to the upper guide by a movable connection method. Among them, the movable connection method can refer to the connection method of the slider and rail matching or the hole-shaft matching connection method in the prior art.

[0028] The lower connecting mechanism includes a first lower connecting block, a lower middle connecting block, a second lower connecting block and a lower guide. The first lower connecting block is fixed to the lower side of the first straight rail 1, the lower middle connecting block is fixed to the lower side of the middle straight rail 2, and the second lower connecting block is fixed to the lower side of the second straight rail 3. The lower guide is arranged parallel to the length direction of the middle straight rail 2, and the first lower connecting block, the lower middle connecting block and the second lower connecting block are connected to the lower guide by a movable connection.

[0029] In addition, both the upper guide part and the lower guide part are provided with a limiting structure. When the track beam is stretched and deformed, the distance between the first straight rail 1 and the second straight rail 3 increases, and the limiting structure can prevent the first straight rail 1 and the second straight rail 3 from detaching from the upper guide assembly or the lower guide assembly.

[0030] In some embodiments, the upper connecting mechanism also includes an elastic member, which cooperates with the upper guide portion and the connecting block to elastically support the middle straight rail 2 in the length direction, thereby reducing the movement of the middle straight rail 2 when the monorail crane vehicle passes by, thereby reducing noise and increasing the rigidity of the track beam.

[0031] In some embodiments, the upper guide portion is an upper through shaft 4, and the upper connecting mechanism uses a hole-shaft matching method to achieve a movable connection. Figure 2 or Figure 3As shown, the first upper connecting block has a first upper connecting hole, the second upper connecting block has a second upper connecting hole, and the upper middle connecting block has an upper middle connecting hole. The first upper connecting hole, the upper middle connecting hole and the second upper connecting hole are coaxially arranged to form an upper communicating hole, and the upper through shaft 4 is inserted into the upper communicating hole and is matched with the clearance of the upper through hole, so as to realize the movable connection of the first lower connecting block, the lower middle connecting block and the second lower connecting block. One end of the upper through shaft 4 is provided with a shaft cap, and the other end is provided with an external thread. The upper through shaft 4 is connected to the upper connecting nut 9, and the shaft cap and the upper connecting nut 9 can be used as a limiting mechanism, and the first upper connecting block, the second upper connecting block and the upper middle connecting block are limited by gaskets, etc., to prevent the track beam from being loosened due to excessive stretching length.

[0032] In some embodiments, the lower guide portion is a lower through shaft 5, and the lower connecting mechanism adopts a hole-shaft matching method to achieve a movable connection. Figure 2 or Figure 3 As shown, the first lower connecting block has a first lower connecting hole, the second lower connecting block has a second lower connecting hole, and the lower middle section connecting block has a lower middle section connecting hole. The first lower connecting hole, the lower middle section connecting hole and the second lower connecting hole are coaxially arranged to form a lower communicating hole, and the lower through shaft 5 is inserted into the lower communicating hole to connect the first lower connecting block, the lower middle section connecting block and the second lower connecting block. A shaft cap is provided at one end of the lower through shaft 5, and an external thread is provided at the other end. The lower through shaft 5 is connected to the lower connecting nut 10, and the shaft cap and the lower connecting nut 10 can be used as a limiting mechanism to limit the first lower connecting block, the second lower connecting block and the lower middle section connecting block through a gasket or the like. The distance between the lower connecting nut 10 and the shaft cap of the lower through shaft 5 is greater than the sum of the lengths of the first lower connecting block, the lower middle section connecting block and the second lower connecting block. The lower connecting nut 10 and the shaft cap can play a limiting role to prevent the track beam from being loosened due to excessive stretching.

[0033] In some embodiments, the diameter of the upper connecting hole formed by the first upper connecting hole, the upper middle connecting hole and the second upper connecting hole is larger than the diameter of the upper through shaft 4. A guide sleeve 6 is provided between the upper through shaft 4 and the upper connecting hole, and the upper through shaft 4 is in clearance fit with the guide sleeve 6, and the guide sleeve 6 is in clearance fit with the upper connecting hole. A limiting ring is provided in the middle of the upper middle connecting hole along the circumferential direction, and the inner hole diameter of the limiting ring is smaller than the diameter of the upper connecting hole, and the upper through shaft 4 passes through the inner hole of the limiting ring. The upper connecting mechanism also includes a guide sleeve 6, which is provided on the outer periphery of the upper through shaft 4 and is in clearance fit with the upper through shaft 4. A guide sleeve 6 is provided on each side of the limiting ring. The first upper connecting hole and the second upper connecting hole are respectively in clearance fit with the two guide sleeves 6. The elastic member includes a first spring member 7 and a second spring member 8, the first spring member 7 is provided between the shaft cap and the guide sleeve 6 in the first upper connecting hole, and the second spring member 8 is provided between the upper connecting nut 9 and the guide sleeve 6 in the second upper connecting hole, so as to realize the elastic support of the middle straight rail 2.

[0034] In a specific implementation of the present application, the inner hole of the limiting ring has an internal thread, and the middle portion of the upper through shaft 4 has an external thread. Figure 2 As shown, the limiting ring platform and the upper through shaft 4 are connected by threads, and the two move synchronously, thereby reducing the wear between the upper through shaft 4 and the middle straight rail 2. The end of the first upper connecting hole away from the middle straight rail 2 has a limiting groove arranged along the circumferential direction, and the bottom of the limiting groove forms a limiting surface facing away from the middle straight rail 2 and perpendicular to the axis of the first upper connecting hole. The limiting groove is provided with a limiting ring that fits with the limiting surface. The length of the guide sleeve 6 is less than the distance between the limiting ring and the limiting ring platform. The first spring member 7 is located in the limiting groove and sleeved on the outer periphery of the upper through shaft 4. In the axial direction, the first spring member 7 is located between the limiting ring and the shaft cap of the upper through shaft 4. The first spring member 7 is usually in a compressed state and applies a thrust to the shaft cap away from the middle straight rail 2. Under the action of the thrust, the middle straight rail 2 fits with the first straight rail 1, and the reserved gap is located between the middle straight rail 2 and the second straight rail 3. The elastic force of the first spring member 7 can reduce the movement of the middle straight rail 2, thereby reducing the wear of the connecting mechanism. In order to increase the force-bearing area, a washer that cooperates with the shaft cap is further provided on the outer periphery of the upper through shaft 4, and the first spring member 7 applies a thrust to the shaft cap through the washer. In some embodiments, a protective end cover 11 is provided at one end of the first upper connecting hole away from the middle straight rail 2, and the protective end cover 11 is fixedly connected to the notch of the limiting groove, and the shaft cap of the upper through shaft 4 and the first spring member 7 are located between the protective end cover 11 and the limiting surface, which plays a role in protecting the upper through shaft 4 and the first spring member 7.

[0035] A second spring member 8 is provided between the upper connecting nut 9 and the guide sleeve 6 in the second upper connecting hole. The length of the guide sleeve 6 in the second upper connecting hole is less than the distance between the end face of the second upper connecting block away from the middle straight rail 2 and the limiting ring. It should be noted that the distance includes the width of the preset gap. The upper connecting nut 9 is matched with the end face of the second upper connecting block away from the middle straight rail 2 through a gasket, and the second spring member 8 is located in the second upper connecting hole. The second spring member 8 applies elastic force to the upper connecting nut 9 and the guide sleeve 6, thereby reducing the requirements of the upper connecting mechanism on the matching accuracy.

[0036] In another specific implementation of the present application, the limiting ring is clearance-matched with the upper through shaft 4. Figure 3 As shown, the end of the first upper connecting hole away from the middle straight rail 2 has a limiting groove arranged in the circumferential direction, and the bottom of the limiting groove forms a first limiting surface facing away from the middle straight rail 2 and perpendicular to the axis of the first upper connecting hole. The length of the guide sleeve 6 is less than the distance between the first limiting surface and the limiting ring. The first spring member 7 is located in the limiting groove and is sleeved on the outer periphery of the upper through shaft 4. A washer is also provided on the upper coaxial periphery, and the washer is interference fit with the limiting groove. In the axial direction, the first spring member 7 is located between the washer and the first limiting surface, and the first spring member 7 applies a thrust toward the second straight rail 3 to the middle straight rail 2 through the guide sleeve 6.

[0037] The diameter of the second upper connecting hole at one end away from the middle straight rail 2 is reduced, thereby forming a second limit surface facing the middle straight rail 2. The second spring member 8 is located between the second limit surface and the guide sleeve 6 in the second upper connecting hole, and the second spring member 8 applies a thrust to the middle straight rail 2 in the direction of the first straight rail 1 through the guide sleeve 6. The thrust of the first spring member 7 and the second spring member 8 maintains the middle straight rail 2 between the first straight rail 1 and the second straight rail 3, so that there are reserved gaps between the first straight rail 1 and the middle straight rail 2 and between the middle straight rail 2 and the second straight rail 3.

[0038] In some embodiments, Figure 1 As shown, the first straight rail 1, the middle straight rail 2 and the second straight rail 3 can be formed by segments of a standard track beam, and a reserved gap can be formed at the segment surface after stretching. The first straight rail 1, the middle straight rail 2 and the second straight rail 3 are collinear, and the angle between the segment surface and the lower side of the first straight rail 1 in the length direction is a first preset angle, and the first preset angle is an acute angle. When the monorail crane passes through the reserved gap, the middle straight rail 2 is subjected to a force in the length direction of the track beam, and this force causes the middle straight rail 2 to collide with the first straight rail 1 or the second straight rail 3. The first preset angle can reduce the noise generated during the collision.

[0039] In some embodiments, the reserved gap and the vertical plane parallel to the length direction of the middle straight rail 2 have a second preset angle in the width direction of the middle straight rail 2, and the second preset angle is also an acute angle. When the monorail crane passes through the reserved gap, there is a time difference in the time when the wheels on both sides of the track beam pass through the reserved gap, thereby reducing the impact of the wheels on the middle straight rail 2 and further reducing noise.

[0040] In some embodiments, the middle straight rail 2 and the second straight rail 3 are both two tracks. Figure 1 As shown, the two middle straight rails 2 and the two second straight rails 3 are symmetrically distributed about the center of the straight line passing through the midpoint of the first straight rail 1 and perpendicular to the lower side of the first straight rail 1. Therefore, the two middle straight rails 2 can be interchanged, and the two second straight rails 3 can also be interchanged, thereby reducing the manufacturing and maintenance costs of the track beam.

[0041] In this embodiment, the track beam is arranged in sections and connected in a movable manner. When the mine pressure in the tunnel changes and the roof is deformed and displaced, the track beam can produce tensile or compressive deformation, eliminate part of the load, avoid bending deformation or tensile damage of the beam body, and ensure the normal operation of the track beam. In addition, the reserved gap in the track beam is inclined to reduce the impact of the monorail crane on the middle straight rail 2 when the monorail crane passes by, thereby reducing the noise of the monorail crane running.

[0042] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0043] The track beam provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A track beam, characterized in that: The invention comprises a first straight rail (1), a second straight rail (3) and a middle straight rail (2) located therebetween, wherein the distance between the first straight rail (1) and the second straight rail (3) is greater than the length of the middle straight rail (2), and a reserved gap for absorbing deformation of the track beam is formed between the first straight rail (1) and the middle straight rail (2) and / or between the second straight rail (3) and the middle straight rail (2), and the upper side and the lower side of the first straight rail (1), the middle straight rail (2) and the second straight rail (3) are movably connected via a connecting mechanism, and the connecting mechanism comprises a connecting block fixedly connected to the first straight rail (1), the middle straight rail (2) and the second straight rail (3) and a guide portion movably connecting the connecting block; The connecting mechanism comprises an upper connecting mechanism and a lower connecting mechanism, which are respectively arranged on the upper and lower sides of the first straight rail (1), the middle straight rail (2) and the second straight rail (3), the upper connecting mechanism comprises an upper guide portion, and the upper connecting mechanism also comprises an elastic member that cooperates with the upper guide portion and the connecting block to elastically support the middle straight rail (2) in the length direction; The upper connection mechanism comprises a first upper connection block fixed to the upper side of the first straight rail (1), an upper middle section connection block fixed to the upper side of the middle section straight rail (2), and a second upper connection block fixed to the upper side of the second straight rail (3); the guide portion in the upper connection mechanism is an upper through shaft (4); the first upper connection block has a first upper connection hole, the second upper connection block has a second upper connection hole, and the upper middle section connection block has an upper middle section connection hole; one end of the upper through shaft (4) is provided with a shaft cap, and the other end is provided with an external thread; the upper through shaft (4) is inserted into the first upper connection hole, the upper middle section connection hole, and the second upper connection hole, and is connected to an upper connection nut (9) to connect the first upper connection block, the second upper connection block, and the upper middle section connection block; The lower connecting mechanism comprises a first lower connecting block fixed to the lower side of the first straight rail (1), a second lower connecting block fixed to the lower side of the second straight rail (3), and a lower middle section connecting block fixed to the lower side of the middle section straight rail (2); the guiding part in the lower connecting mechanism is a lower through shaft (5); the first lower connecting block, the second lower connecting block and the lower middle section connecting block are all provided with lower connecting holes; the lower through shaft (5) is inserted into the lower connecting holes of the first lower connecting block, the lower middle section connecting block and the second lower connecting block, and is connected to a lower connecting nut (10); the distance between the lower connecting nut (10) and the shaft cap of the lower through shaft (5) is greater than the sum of the lengths of the first lower connecting block, the lower middle section connecting block and the second lower connecting block; The diameters of the first upper connecting hole, the upper middle connecting hole and the second upper connecting hole are all larger than the diameter of the upper through shaft (4); a limiting ring is provided in the middle of the upper middle connecting hole; the upper through shaft (4) passes through the inner hole of the limiting ring; the upper connecting mechanism further comprises a guide sleeve (6); the guide sleeve (6) is arranged on the outer periphery of the upper through shaft (4); the guide sleeve (6) is provided on both sides of the limiting ring; the first upper connecting hole and the second upper connecting hole are respectively clearance-matched with the guide sleeves (6) on both sides of the limiting ring.

2. The track beam according to claim 1, characterized in that: The inner hole of the limiting ring has an internal thread, the middle part of the upper through shaft (4) has an external thread, the limiting ring is connected to the middle part of the upper through shaft (4), the first upper connecting hole has a limiting groove, the bottom of the limiting groove is a limiting surface facing away from the middle straight rail (2), the limiting groove is provided with a limiting ring that fits with the limiting surface, the elastic member comprises a first spring member (7) and a second spring member (8), the first spring member (7) is located between the limiting ring and the shaft cap of the upper through shaft (4) and is used to push the middle straight rail (2) to fit with the first straight rail (1), the reserved gap is located between the middle straight rail (2) and the second straight rail (3), and the second spring member (8) is located between the upper connecting nut (9) and the guide sleeve (6) in the second upper connecting hole.

3. The track beam according to claim 1, characterized in that: The limiting ring is loosely matched with the upper through shaft (4); the elastic member comprises a first spring member (7) and a second spring member (8); the first spring member (7) is located between the shaft cap of the upper through shaft (4) and the guide sleeve (6) in the first upper connecting hole; the second spring member (8) is located between the upper connecting nut (9) and the guide sleeve (6) in the second upper connecting hole; the first straight rail (1) and the middle straight rail (2) and the middle straight rail (2) and the second straight rail (3) both have the reserved gap.

4. The track beam according to any one of claims 1 to 3, characterized in that: There is a first preset angle between the reserved gap and the lower side of the middle straight rail (2), and the first preset angle is an acute angle.

5. The track beam according to claim 4, characterized in that: There is a second preset angle between the reserved gap and a vertical plane parallel to the width direction of the middle straight rail (2), and the second preset angle is an acute angle.

6. The track beam according to claim 5, characterized in that: There are two middle straight rails (2) and two second straight rails (3), and the two middle straight rails (2) and the two second straight rails (3) are symmetrically distributed about the center line of the first straight rail (1).

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