A gapless guide type expansion joint

Abstract

The application discloses a gapless guide type expansion joint and relates to the technical field of conductive rails, wherein a first conductive plate is fixed on a first I-shaped base, and a first strip-shaped hole is arranged on the waist of the first I-shaped base; a second sliding rail assembly comprises a second I-shaped base, a second conductive plate is fixed on the second I-shaped base, and a second strip-shaped hole is arranged on the waist of the second I-shaped base; a first guide plate and a second guide plate are respectively attached to the two sides of the first I-shaped base and the second I-shaped base, and a first connecting bolt and a second connecting bolt are respectively arranged through the first strip-shaped hole and the second strip-shaped hole to connect the first guide plate and the second guide plate; the thickness size of the expansion joint is greatly reduced, the I-shaped shape of the first I-shaped base and the second I-shaped base is matched, the weight of the expansion joint is greatly reduced, the manufacturing cost can be saved, the manufacturing process is reduced, and the expansion joint is suitable for the installation form of side support.

Description

Technical Field

[0001] The invention relates to the technical field of conductive rails, in particular to a gapless guide type expansion joint. Background Art

[0002] The contact rail system is one of the key power supply devices for urban rail transit systems. It is generally installed on both sides of the train track. A current collector is installed on the train. During the operation of the train, the current collector contacts the contact rail surface to realize the process of powering the train.

[0003] Generally, the contact rail system is divided into several anchor sections, and an expansion joint is set in the middle of each anchor section. The changes in ambient temperature and the heat generated by the current during operation will cause the temperature of the contact rail to change, causing the contact rail to expand and contract. The role of the expansion joint is to meet the thermal expansion and contraction requirements of the contact rail, so that the train current collector can pass smoothly and meet the power supply needs of the train.

[0004] Commonly used contact rail expansion joints on the market consist of two long rails with a short rail positioned between them. A distinct expansion gap is left between the short rail and the long rail to accommodate thermal expansion and contraction. The presence of this expansion gap can cause noise and arcing in the current collector when it passes through, hindering train operation.

[0005] In the invention patent application number "201710960283.8," entitled "Expansion Joint for Conductor Rail Assembly and Conductor Rail Assembly," the expansion joint includes: a first adapter; a first fixed steel plate disposed on the first adapter; a second adapter spaced apart from the first adapter; a second fixed steel plate disposed on the second adapter, with the distance between the first and second fixed steel plates gradually increasing along the width of the second adapter; and a sliding steel plate disposed between the first and second fixed steel plates and slidably connected thereto, respectively, with the upper surfaces of the first, second, and sliding steel plates flush. The expansion joint of this invention ensures a smooth transition between the sliding steel plate and the first and second fixed steel plates, thereby increasing train speed and reducing noise.

[0006] However, the stacked arrangement of the conductive rails, inner clamping plates, and adapters in this technical solution results in a complex structure and a high weight. When the current collector adopts a side contact current transfer method, the components will deflect and deform under the influence of their own weight, which greatly affects the sliding resistance of the expansion element. Summary of the Invention

[0007] The purpose of the present invention is to provide a gapless guide expansion joint to solve the problems existing in the prior art, greatly reduce the thickness of the expansion joint, and cooperate with the I-shaped shape of the first I-shaped base and the second I-shaped base to greatly reduce its own weight, save manufacturing costs, reduce manufacturing processes, and is suitable for the installation form of the expansion joint for side support.

[0008] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a gapless guide expansion joint, comprising a first slide rail assembly, a second slide rail assembly, a compensation slider, a lumbar support assembly, and a conductive connection assembly;

[0009] The first slide rail assembly includes a first I-shaped base, a first conductive plate is fixed on the first I-shaped base, and a first strip hole is provided at the waist of the first I-shaped base; the second slide rail assembly includes a second I-shaped base, a second conductive plate is fixed on the second I-shaped base, and a second strip hole is provided at the waist of the second I-shaped base;

[0010] The compensating slider is capable of sliding between the first conductive plate and the second conductive plate along the width direction of the first conductive plate, so that there is zero gap between the compensating slider and the first conductive plate and the second conductive plate;

[0011] The lumbar support assembly includes a first guide plate, a second guide plate, a first connecting bolt, and a second connecting bolt. The first guide plate and the second guide plate are respectively attached to both sides of the first I-shaped base and the second I-shaped base. The first connecting bolt and the second connecting bolt pass through the first strip hole and the second strip hole respectively to connect the first guide plate and the second guide plate.

[0012] The conductive connection components are connected to the first I-shaped base and the second I-shaped base respectively.

[0013] Preferably, the first guide plate is located below the second guide plate, an L-shaped support plate is fixed on the first guide plate, and the length of the L-shaped support plate is not less than the length of the compensation slider.

[0014] Preferably, the first I-shaped base and the second I-shaped base are further provided with a third strip hole and a fourth strip hole, respectively, and the third strip hole and the fourth strip hole are respectively spaced apart from the first strip hole and the second strip hole; the third connecting bolt and the fourth connecting bolt respectively pass through the third strip hole and the fourth strip hole to connect the first guide plate and the second guide plate.

[0015] Preferably, the first connecting bolt, the second connecting bolt, the third connecting bolt and the fourth connecting bolt are respectively provided with a first limiting sleeve, a second limiting sleeve, a third limiting sleeve and a fourth limiting sleeve; the two ends of the first limiting sleeve, the second limiting sleeve, the third limiting sleeve and the fourth limiting sleeve are respectively abutted against the first guide plate and the second guide plate.

[0016] Preferably, the compensation slider includes a slider body, and sliding bosses are provided at both ends of the slider body in the length direction of the slider body, and the two sliding bosses are distributed in an eight-shaped shape; the ends of the first conductive plate and the second conductive plate are both obliquely provided with sliding grooves, and the sliding bosses are slidably arranged in the sliding grooves.

[0017] Preferably, the compensation slider further comprises a compensation metal belt fixed on the slider body, and an end portion of the compensation metal belt is electrically connected to the conductive connection assembly.

[0018] Preferably, the bottom surface of the compensation slider is provided with a first rolling groove and a second rolling groove, and the first rolling groove and the second rolling groove are respectively arranged parallel to the two sliding bosses, and the first I-shaped base and the second I-shaped base are both provided with a fixing plate, and in the length direction of the first I-shaped base, the two fixing plates are respectively located at the ends of the first I-shaped base and the second I-shaped base, on one side of the first conductive plate and the second conductive plate, and are arranged close to the first rolling groove and the second rolling groove; a plurality of rolling elements are rotatably arranged on the fixing plate, and the distribution trajectories of the plurality of rolling elements are parallel to the corresponding sliding grooves, and two groups of the plurality of rolling elements are rollingly arranged in the first rolling groove and the second rolling groove.

[0019] Preferably, along the width direction of the fixed plate, a first baffle and a second baffle are respectively provided on the two end surfaces of the fixed plate, and the first baffle and the second baffle are both located on the distribution tracks of several of the rolling elements and can slide in the first rolling groove or the second rolling groove.

[0020] Preferably, the conductive connection assembly includes an annular soft metal belt, on the two opposite inner side surfaces of which are respectively fixed a first electrical connection block and a second electrical connection block fixed to the bottom of the first I-shaped base and the second I-shaped base; the end of the compensation metal belt is electrically connected to the annular soft metal belt.

[0021] Preferably, the first conductive plate, the second conductive plate and the slider body all include a stainless steel layer, an adhesive metal layer and a conductive aluminum alloy layer stacked from the outside to the inside.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] 1. The present invention provides strip-shaped through holes at the waist of the first I-shaped base and the second I-shaped base, and arranges the first guide plate and the second guide plate at the waist of the I-shaped base. A set of guide structures can be used to guide the first I-shaped base and the second I-shaped base, making the guide structure simpler.

[0024] 2. The present invention utilizes a first connecting bolt to connect the first guide plate, the first I-shaped base, and the second guide plate, and utilizes a second connecting bolt on the other side to connect the first guide plate, the second I-shaped base, and the second guide plate, replacing the prior art structure in which the guide device and the fixed base are stacked. This not only simplifies the connection method and greatly reduces the thickness of the expansion joint, but also significantly reduces its own weight by matching the I-shaped shape of the first and second I-shaped bases, thereby saving manufacturing costs and simplifying the manufacturing process. When the gapless guide expansion joint is supported laterally and the current collector adopts a lateral contact current transfer method, the deflection deformation caused by the expansion joint's own weight can be reduced, ensuring that there is a small sliding resistance between the compensation slider and the first and second conductive plates, so that its compensation function can be stably exerted.

[0025] 3. In the present invention, an L-shaped support plate is fixed to the bottom of the second guide plate. The L-shaped structure can improve the rigidity of the second guide plate and reduce the deflection deformation of the expansion joint due to its own gravity;

[0026] 4. The compensating slider of the present invention further includes a compensating metal strip fixed to the slider body, and the end of the compensating metal strip is electrically connected to the conductive connection component to achieve the effect of stable current diversion;

[0027] 5. In the present invention, the first conductive plate, the second conductive plate, and the slider body each comprise a stainless steel layer, an adhesive metal layer, and a conductive aluminum alloy layer stacked from outside to inside. The stainless steel layer has excellent wear resistance, the conductive aluminum alloy layer has excellent conductivity, and the adhesive metal layer improves the bonding between the stainless steel layer and the conductive aluminum alloy layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 Schematic diagram of the overall structure of the expansion joint in the present invention;

[0030] Figure 2 This is a schematic diagram of the explosion structure of the expansion joint;

[0031] Figure 3 It is a structural diagram of the compensation slider;

[0032] Figure 4 Schematic diagram of the structure of the slider body;

[0033] Figure 5 for Figure 4 Bottom view of

[0034] Figure 6 is a structural schematic diagram of the first slide rail assembly;

[0035] Figure 7 Schematic diagram of the structure of the first I-shaped base;

[0036] Figure 8 is a schematic structural diagram of the second conductive plate;

[0037] Figure 9 It is a structural diagram of the fixed block;

[0038] Figure 10 is a structural diagram of a rolling element;

[0039] Figure 11 is a structural diagram of a lumbar support assembly;

[0040] Figure 12 is a structural schematic diagram of the first guide plate;

[0041] Figure 13 is a schematic structural diagram of a conductive connection component;

[0042] Figure 14 It is a structural diagram of the expansion joint when it is closed;

[0043] Figure 15 for Figure 14 Bottom view of

[0044] Figure 16 This is a schematic diagram of the structure of the expansion joint when the slider body reaches the farthest displacement;

[0045] Figure 17 for Figure 16 Bottom view of

[0046] in:

[0047] 1. First slide rail assembly;

[0048] 11. First I-shaped base; 111. First strip hole; 112. Third strip hole; 113. Connecting hole;

[0049] 12. First conductive plate; 121. Sliding groove;

[0050] 13. Fixing plate; 131. Roller fixing hole; 132. Countersunk hole; 133. Baffle mounting hole; 134. First baffle; 135. Second baffle;

[0051] 2. Second slide rail assembly;

[0052] 21. Second I-shaped base; 211. Second strip hole; 212. Fourth strip hole;

[0053] 22. Second conductive plate; 23. Small roller; 24. Screw;

[0054] 3. Compensation slider;

[0055] 31. Slider body; 311. Sliding boss; 312. First rolling groove; 313. Second rolling groove; 314. Metal belt fixing hole;

[0056] 32. Compensating metal belt;

[0057] 4. Lumbar support assembly;

[0058] 41. First guide plate; 411. Avoidance groove; 412. Guide surface;

[0059] 42. Second guide plate;

[0060] 43. First connecting bolt; 431. First limiting sleeve;

[0061] 44. Second connecting bolt; 441. Second limiting sleeve;

[0062] 45. L-shaped support plate;

[0063] 46. ​​Third connecting bolt; 461. Third limiting sleeve;

[0064] 47. Fourth connecting bolt; 471. Fourth limiting sleeve;

[0065] 5. Conductive connection components;

[0066] 51. First electrical connection block; 52. Second electrical connection block; 53. Annular soft metal belt; 54. Inner clamping plate; 55. Outer limit plate; 56. Matching fasteners;

[0067] 6. Stainless steel layer; 7. Adhesive metal layer; 8. Conductive aluminum alloy layer. DETAILED DESCRIPTION

[0068] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0069] The purpose of the present invention is to provide a gapless guide expansion joint to solve the problems existing in the prior art, greatly reduce the thickness of the expansion joint, and cooperate with the I-shaped shape of the first I-shaped base and the second I-shaped base to greatly reduce its own weight, save manufacturing costs, reduce manufacturing processes, and is suitable for the installation form of the expansion joint for side support.

[0070] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0071] like Figures 1 to 17 As shown, this embodiment provides a gapless guided expansion joint, including a first slide rail assembly 1, a second slide rail assembly 2, a compensation slider 3, a lumbar support assembly 4 and a conductive connection assembly 5; the first slide rail assembly 1 includes a first I-shaped base 11, a first conductive plate 12 is fixed on the first I-shaped base 11, and a first strip hole 111 is provided at the waist of the first I-shaped base 11; the second slide rail assembly 2 includes a second I-shaped base 21, a second conductive plate 22 is fixed on the second I-shaped base 21, and a second strip hole 211 is provided at the waist of the second I-shaped base 21; the compensation slider 3 can slide between the first conductive plate 12 and the second conductive plate 22 along the width direction of the first conductive plate 12, so that there is zero gap between the compensation slider 3 and the first conductive plate 12 and the second conductive plate 22. The lumbar support assembly 4 includes a first guide plate 41, a second guide plate 42, a first connecting bolt 43 and a second connecting bolt 44. The first guide plate 41 and the second guide plate 42 have a guide surface 412, and the guide surface 412 is in contact with the inner side surface of the flange of the first I-shaped base 11 and the second I-shaped base 21. The first connecting bolt 43 and the second connecting bolt 44 respectively pass through the first strip hole 111 and the second strip hole 211 to connect the first guide plate 41 and the second guide plate 42; the conductive connection assembly 5 is respectively connected to the first I-shaped base 11 and the second I-shaped base 21 for diversion.

[0072] like Figures 14 to 17As shown, under the action of external forces or when thermal expansion and contraction occur, the compensating slider 3 can slide along its width direction, driving the first conductive plate 12 and the second conductive plate 22 to move toward or relative to each other. At the same time, the first I-shaped base 11 and the second I-shaped base 21 move along the guide surfaces 412 of the first guide plates 41 and the second guide plates 42, achieving the goal of maintaining zero clearance between the compensating slider 3 and the first conductive plate 12 and the second conductive plate 22, thereby stabilizing the flow diversion. In this embodiment, strip-shaped through holes are provided at the waist of the first I-shaped base 11 and the second I-shaped base 21, and the first guide plates 41 and the second guide plates 42 are arranged at the waist of the I-shaped shape. This allows a set of guide structures to guide the first I-shaped base 11 and the second I-shaped base 21, resulting in a simpler guide structure. Furthermore, a first connecting bolt 43 is used to connect the first guide plate 41, the first I-shaped base 11, and the second guide plate 42. On the other side, a second connecting bolt 44 is used to connect the first guide plate 41, the second I-shaped base 21, and the second guide plate 42. This replaces the prior art structure in which the guide device and the fixed base are stacked. This not only simplifies the connection method and significantly reduces the thickness of the expansion joint, but also significantly reduces its own weight by matching the I-shaped shape of the first I-shaped base 11 and the second I-shaped base 21, thus saving manufacturing costs and simplifying the manufacturing process. When the gapless guide expansion joint is supported laterally and the current collector adopts a lateral contact flow transfer method, the deflection deformation caused by the expansion joint's own weight can be reduced, ensuring that there is less sliding resistance between the compensation slider 3 and the first conductive plate 12 and the second conductive plate 22, so that its compensation function can be stably performed.

[0073] like Figure 11 As shown, to further reduce the weight of the expansion joint, in this embodiment, the first guide plate 41, the second guide plate 42, the first I-shaped base 11, and the second I-shaped base 21 are all made of aluminum alloy. Furthermore, the expansion joint in this embodiment can be installed using either bottom supports or side supports. However, aluminum alloy has poor rigidity. When installed using side supports, the first guide plate 41 is located below the second guide plate 42. Under the influence of its own weight, the middle portion of the expansion joint (i.e., the compensating slider 3 and the locations on both sides thereof) is still susceptible to deflection. To avoid this technical problem, in this embodiment, an L-shaped support plate 45 is fixed to the bottom of the first guide plate 41. The length of the L-shaped support plate 45 is no less than the length of the compensating slider 3. Of course, it is also feasible to install the L-shaped support plate 45 on both the first guide plate 41 and the second guide plate 42. The L-shaped support plate 45 can improve the rigidity of the first guide plate 41 through its L-shaped structure. Specifically, the L-shaped support plate 45 can be made of tool steel or stainless steel.

[0074] like Figure 6 、 Figure 7As shown, in this embodiment, the first I-shaped base 11 and the second I-shaped base 21 are respectively provided with a third strip hole 112 and a fourth strip hole 212 in the middle of the length direction. The third connecting bolt 46 and the fourth connecting bolt 47 pass through the third strip hole 112 and the fourth strip hole 212, respectively, to connect the first guide plate 41 and the second guide plate 42. The first strip hole 111 and the second strip hole 211 are respectively located on one end of the first I-shaped base 11 and the second I-shaped base 21, near the compensation slider 3. The other end of the first I-shaped base 11 and the second I-shaped base 21 is provided with a connecting hole 113 for connecting other components. In this embodiment, the first I-shaped base 11 and the second I-shaped base 21 have the same structure. In the drawings, only the structure of the first I-shaped base 11 is illustrated.

[0075] like Figure 11 、 Figure 12 As shown, the first, second, third, and fourth connecting bolts 43, 44, 46, and 47 are respectively covered with a first limiting sleeve 431, a second limiting sleeve 441, a third limiting sleeve 461, and a fourth limiting sleeve 471. The ends of the first, second, third, and fourth limiting sleeves 431, 441, 461, and 471 respectively abut against the first and second guide plates 41, 42. The provision of multiple limiting sleeves prevents excessive pressure from being applied to the I-shaped base, ensuring smooth sliding.

[0076] like Figures 3 to 5 As shown, the compensation slider 3 includes a slider body 31, which may be trapezoidal in shape. Sliding bosses 311 are provided on both sides of the slider body 31 along its length. Sliding grooves 121 are obliquely provided at the ends of the first conductive plate 12 and the second conductive plate 22, and the sliding bosses 311 slide within the sliding grooves 121. Preferably, the first conductive plate 12 and the second conductive plate 22 are symmetrical with respect to the centerline of the slider body 31, and the slider body 31 itself is in the shape of an isosceles trapezoid.

[0077] The bottom surface of the slider body 31 is also provided with a first rolling groove 312 and a second rolling groove 313. The first rolling groove 312 and the second rolling groove 313 are respectively arranged parallel to the two sliding bosses 311 and symmetrically about the midline of the slider body 31. A fixing plate 13 is provided on each of the first and second I-shaped bases 11 and 21. Along the length of the first I-shaped base 11, the two fixing plates 13 are located at the ends of the first and second I-shaped bases 11 and 21, respectively, and on one side of the first and second conductive plates 12 and 22, near the first and second rolling grooves 312 and 313. A plurality of rolling elements are rotatably mounted on the fixing plates 13. The distribution paths of the rolling elements are parallel to their corresponding sliding grooves 121. Two groups of rolling elements roll within the first and second rolling grooves 312 and 313. Specifically, the rolling elements may be small rollers 23. The cooperation between the small rollers 23 and the rolling grooves enables the linkage between the slider body and the first and second conductive plates 12 and 22. The fixing plate 13 is provided with a plurality of roller fixing holes 131 and inner countersunk holes 132. The roller fixing holes 131 correspond to and are connected to the inner countersunk holes 132. The small roller 23 is rotatably fixed on a screw rod 24. After the screw rod 24 passes through the roller fixing hole 131, the end thereof extends into the inner countersunk hole 132. A nut is provided in the inner countersunk hole 132. Figures 9 and 10 shown.

[0078] The reason why rolling elements are not directly arranged on the first I-shaped base 11 and the second I-shaped base 21 in this embodiment is that the thickness of the flanges on both sides of the I-shaped base is relatively small, and the inner side surfaces are inclined, which makes it inconvenient to fix the rolling elements. The thickness of the fixing plate 13 is larger than the flanges, and the lower surface is flat, which makes it easier to open the roller fixing hole 131 and the inner countersunk hole 132. In order to ensure that the upper surface of the fixing plate 13 does not exceed the height of the lower surface of the first conductive plate 12 and the second conductive plate 22, the ends of the first I-shaped base 11 and the second I-shaped base 21 can be cut off to an appropriate height before installing the fixing plate 13. In addition, in order to avoid the fixing plate 13, the middle parts of the first guide plate 41 and the second guide plate 42 are provided with an avoidance groove 411, and the guide surface 412 is provided at the two end positions of the first guide plate 41 and the second guide plate 42.

[0079] Furthermore, baffle mounting holes 133 are provided on both end surfaces of the fixed plate 13 along the width direction of the fixed plate 13, and a first baffle 134 and a second baffle 135 are respectively provided at the baffle mounting holes 133. The first baffle 134 and the second baffle 135 are both located on the distribution tracks of several rolling elements and can slide in the first rolling groove 312 or the second rolling groove 313 to protect the rolling elements.

[0080] In this embodiment, the compensating slider 3 also includes a compensating metal band 32 fixed to the slider body 31. The lower surface of the slider body 31 is provided with a metal band fixing hole 314 for securing the compensating metal band 32. The end of the compensating metal band 32 is electrically connected to the conductive connection assembly 5. Although the slider body 31 and the first and second conductive plates 12 and 22 brackets have a zero-clearance fit, a small amount of clearance does exist, which affects the flow diversion process. The compensating metal band 32 ensures stable flow diversion.

[0081] like Figure 13 As shown, the bottom conductive connection assembly 5 includes a first electrical connection block 51, a second electrical connection block 52, an annular soft metal belt 53, an inner clamping plate 54, an outer limit plate 55, and matching fasteners 56. The first electrical connection block 51 and the second electrical connection block 52 are welded to the lower portion of the first I-shaped base 11 and the second I-shaped base 21, respectively. The fasteners fix the inner clamping plate 54, the annular soft metal belt 53, and the outer limit plate 55 to the electrical connection blocks in order from the inside to the outside.

[0082] The annular soft metal strip 53 is composed of a stack of copper foil sheets. An inner clamping plate 54, positioned between the electrical connection block and the annular soft metal strip 53, clamps the copper foil and increases the contact area for flow diversion. An outer limiting plate 55 defines the outer boundaries of the annular soft metal strip 53. The interaction between the inner clamping plate 54 and the outer limiting plate 55 ensures that the annular soft metal strip 53 remains confined within the outer limiting plate 55 during deformation and movement. This ensures that the shape and dimensions of the annular soft metal strip 53 remain constant, ensuring smooth flow diversion.

[0083] In this embodiment, the first conductive plate 12, the second conductive plate 22, and the slider body 31 each include a stainless steel layer 6, an adhesive metal layer 7, and a conductive aluminum alloy layer 8, stacked from outside to inside. The stainless steel layer 6 has excellent wear resistance, the conductive aluminum alloy layer 8 has excellent electrical conductivity, and the adhesive metal layer 7 improves the bonding performance between the stainless steel layer 6 and the conductive aluminum alloy layer 8.

[0084] Adaptive changes based on actual needs are all within the scope of protection of the present invention.

[0085] It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

Claims

1. A gapless guided expansion joint, characterized in that: It includes a first slide rail assembly, a second slide rail assembly, a compensation slider, a lumbar support assembly, and a conductive connection assembly; The first slide rail assembly includes a first I-shaped base, a first conductive plate is fixed on the first I-shaped base, and a first strip hole is provided at the waist of the first I-shaped base; the second slide rail assembly includes a second I-shaped base, a second conductive plate is fixed on the second I-shaped base, and a second strip hole is provided at the waist of the second I-shaped base; The compensating slider is capable of sliding between the first conductive plate and the second conductive plate along the width direction of the first conductive plate, so that there is zero gap between the compensating slider and the first conductive plate and the second conductive plate; The lumbar support assembly includes a first guide plate, a second guide plate, a first connecting bolt, and a second connecting bolt. The first guide plate and the second guide plate are respectively attached to both sides of the first I-shaped base and the second I-shaped base. The first connecting bolt and the second connecting bolt pass through the first strip hole and the second strip hole respectively to connect the first guide plate and the second guide plate. The conductive connection assembly is connected to the first I-shaped base and the second I-shaped base respectively; The compensating slider includes a slider body, wherein sliding bosses are provided at both ends of the slider body in the length direction of the slider body, and a first rolling groove and a second rolling groove are provided on the bottom surface of the compensating slider, and the first rolling groove and the second rolling groove are respectively arranged in parallel with the two sliding bosses, a first fixing plate is provided on the first I-shaped base, and a second fixing plate is provided on the second I-shaped base, and in the length direction of the first I-shaped base, the first fixing plate is located at the end of the first I-shaped base and on one side of the first conductive plate, and is arranged close to the first rolling groove, and the second fixing plate is located at the end of the second I-shaped base and on one side of the second conductive plate, and is arranged close to the second rolling groove; a plurality of rolling elements are rotatably provided on the first fixing plate and the second fixing plate, and the distribution tracks of the plurality of rolling elements are parallel to the sliding grooves corresponding to them, and two groups of the plurality of rolling elements are rollingly arranged in the first rolling groove and the second rolling groove; A first baffle and a second baffle are provided on both end surfaces of the first fixed plate and the second fixed plate along the width direction of the first fixed plate or the second fixed plate, and the first baffle and the second baffle are both located on the distribution tracks of the plurality of rolling elements and are capable of sliding in the first rolling groove or the second rolling groove; Cut off the end of the first I-shaped base to an appropriate height to ensure that the upper surface of the first fixed plate does not exceed the height of the lower surface of the first conductive plate; cut off the end of the second I-shaped base to an appropriate height to ensure that the upper surface of the second fixed plate does not exceed the height of the lower surface of the second conductive plate.

2. The gapless guide type expansion joint according to claim 1, characterized in that: The first guide plate is located below the second guide plate. An L-shaped support plate is fixed on the first guide plate. The length of the L-shaped support plate is not less than the length of the compensation slider.

3. The gapless guide type expansion joint according to claim 1 or 2, characterized in that: The first I-shaped base and the second I-shaped base are further provided with a third strip hole and a fourth strip hole, respectively. The third strip hole and the fourth strip hole are respectively spaced apart from the first strip hole and the second strip hole; the third connecting bolt and the fourth connecting bolt respectively pass through the third strip hole and the fourth strip hole to connect the first guide plate and the second guide plate.

4. The gapless guide type expansion joint according to claim 3, characterized in that: The first connecting bolt, the second connecting bolt, the third connecting bolt and the fourth connecting bolt are respectively provided with a first limiting sleeve, a second limiting sleeve, a third limiting sleeve and a fourth limiting sleeve; the two ends of the first limiting sleeve, the second limiting sleeve, the third limiting sleeve and the fourth limiting sleeve are respectively abutted against the first guide plate and the second guide plate.

5. The gapless guide type expansion joint according to claim 4, characterized in that: The two sliding bosses are distributed in an eight-shaped shape; the ends of the first conductive plate and the second conductive plate are both obliquely provided with sliding grooves, and the sliding bosses are slidably arranged in the sliding grooves.

6. The gapless guide type expansion joint according to claim 5, characterized in that: The compensation slider further includes a compensation metal belt fixed on the slider body, and an end portion of the compensation metal belt is electrically connected to the conductive connection assembly.

7. The gapless guide type expansion joint according to claim 6, characterized in that: The conductive connection assembly includes an annular soft metal belt, on the two opposite inner side surfaces of which are respectively fixed a first electrical connection block and a second electrical connection block fixed to the bottom of the first I-shaped base and the second I-shaped base; the end of the compensation metal belt is electrically connected to the annular soft metal belt.

8. The gapless guide type expansion joint according to claim 5, characterized in that: The first conductive plate, the second conductive plate and the slider body each include a stainless steel layer, an adhesive metal layer and a conductive aluminum alloy layer stacked from outside to inside.

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