Ballast bottom beam fast-assembling pressing plate, pressing plate fixing system and assembling method

Abstract

The invention discloses a quick-mounting pressing plate for a ballast bottom beam, a pressing plate fixing system and an assembling method. The pressing plate is a plate body; a left side clamping part and a right side clamping part are arranged at the bottom of the plate body, and the left side clamping part and the right side clamping part can be clamped with corresponding ribs of a ballast bottom beam in the left-right direction; a protruding part and an avoiding space are arranged in the left side clamping part. The left side locking part and the right side locking part are arranged between the left side clamping part and the right side clamping part; the left side lock catch part is provided with a left inverted buckle which is vertically positioned below the left side clamping part; the buckling direction of the left inverted buckle is opposite to the clamping direction of the left side clamping part, and the left inverted buckle is obliquely upward; the right side lock catch part is provided with a right inverted buckle which is vertically positioned below the right side clamping part, and the buckling direction of the right inverted buckle is opposite to the clamping direction of the right side clamping part. The connecting structure has the advantages of simple structure, simple and quick mounting steps, stable and reliable connection and the like.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, specifically to a quick-installation pressure plate for a ballast bottom beam, a pressure plate fixing system, and an assembly method. Background Technology

[0002] In photovoltaic (PV) systems, PV modules are typically secured to the ballast beams of rooftop or ground-mounted support systems using pressure plates. Currently, a common fixing method uses plastic-wing nuts as the core connector between the pressure plate and the guide rail. The typical installation process for this method is as follows: First, the installer pre-fits the plastic-wing nut into a specially designed recessed groove on the ballast beam. Then, the pressure plate is placed on top of the plastic-wing nut, aligning its through-hole with the threaded hole of the nut. Finally, using an installation tool, bolts are screwed through the pressure plate into the plastic-wing nut, and tightening the bolts secures the PV module to the pressure plate.

[0003] The existing fixing method has two main drawbacks. First, because the plastic wing nut is fixed to the recessed groove in the middle of the ballast base beam, the locking force on the pressure plate is mainly concentrated in the middle of the pressure plate, making the edges of the pressure plate susceptible to upward external force and prone to springing and warping. Second, the installation steps of this fixing method are cumbersome, heavily relying on on-site step-by-step assembly, resulting in long installation time at each point and low installation efficiency.

[0004] In view of this, this case conducts an in-depth study on the above-mentioned problems and proposes a quick-installation pressure plate for ballast bottom beams, a pressure plate fixing system and assembly method that can effectively solve the aforementioned technical problems. This case arises from this. Summary of the Invention

[0005] The purpose of this invention is to provide a quick-installation pressure plate for ballast bottom beams, a pressure plate fixing system, and an assembly method, which has advantages such as simple structure, simple and quick installation steps, and stable and reliable connection.

[0006] To achieve the above objectives, the solution of the present invention is: A quick-installation pressure plate for a ballast bottom beam, comprising a plate body; the bottom of the plate body is provided with: The left and right locking parts are capable of engaging with the corresponding reinforcing bars of the ballast bottom beam in the left-right direction to achieve vertical positioning. The left locking part is provided with a protrusion that serves as a rotation fulcrum and a clearance space constructed by the protrusion. A left-side locking part and a right-side locking part are disposed between the left-side latching part and the right-side latching part; the left-side locking part has a left undercut located vertically below the left-side latching part, the latching direction of the left undercut is opposite to the latching direction of the left-side latching part and is obliquely upward; the right-side locking part has a right undercut located vertically below the right-side latching part, the latching direction of the right undercut is opposite to the latching direction of the right-side latching part.

[0007] Both the left and right snap-fit ​​portions are U-shaped grooves, with the depth of the U-shaped groove in the left snap-fit ​​portion being greater than the depth of the U-shaped groove in the right snap-fit ​​portion.

[0008] The card interface of the left card connector is opposite to the card interface of the right card connector. The left buckle is inclined to the upper left when it is fastened, and the right buckle is horizontally set to the right when it is fastened.

[0009] The protrusion includes an upper protrusion and a lower protrusion, and the clearance space correspondingly includes an upper clearance space located on the side of the upper protrusion and a lower clearance space located on the side of the lower protrusion.

[0010] The upper protrusion and the lower protrusion are arranged in a staggered manner on the vertical plane, with the upper part on the right and the lower part on the left.

[0011] The left-side locking portion includes an elastic cantilever portion extending downwardly from the bottom of the plate body, and the left buckle is formed at the end of the elastic cantilever portion.

[0012] The right-side locking portion includes a first arm extending downward from the bottom of the plate body and a second arm extending approximately horizontally from the end of the first arm, with the right buckle located at the free end of the second arm.

[0013] A guide slope is provided on the outer side of the end of the left inverted buckle.

[0014] The pressure plate is a one-piece metal stamping part or an engineering plastic injection molded part.

[0015] A pressure plate fixing system includes a ballast bottom beam and a quick-install pressure plate for the ballast bottom beam as described above.

[0016] The ballast bottom beam is provided with a left side rib, a right side rib, and a left and right locking rib located on the middle sinking groove. The left side snap-fit ​​part engages with the left side rib, and the right side snap-fit ​​part engages with the right side rib, together achieving vertical limiting. The left buckle engages with the lower edge of the left locking rib to achieve vertical and horizontal limiting, and the right buckle engages with the side edge of the left locking rib to achieve horizontal limiting.

[0017] The pressure plate and the ballast bottom beam are fixedly connected by a pressing type. The left snap-fit ​​part first snaps into the left rib and forms a rotation fulcrum. The pressure plate rotates around the fulcrum toward the ballast bottom beam, so that the left buckle snaps into the lower edge of the left locking rib, while the right buckle undergoes elastic deformation. The pressure plate slides to the left, so that the right snap-fit ​​part snaps into the right rib, while the right buckle restores its deformation and snaps into the right locking rib, thereby fixing the pressure plate and the ballast bottom beam in the vertical and horizontal directions.

[0018] An assembly method for a pressure plate fixing system includes the following steps: S1: Align the left snap-fit ​​part of the pressure plate with the left reinforcing bar of the ballast bottom beam and push it in so that the protrusion in the left snap-fit ​​part cooperates with the left reinforcing bar to form a rotation fulcrum. S2: Using the pivot point as the axis, rotate the pressure plate toward the ballast bottom beam and press it down until the left buckle is pressed in and fastened to the lower edge of the left locking rib of the ballast bottom beam. At this time, the right snap-fit ​​part is aligned with the right rib, and the right buckle undergoes elastic deformation due to pressure. S3: Push the pressure plate to the left so that the right snap-fit ​​part engages with the right rib, and at the same time the right undercut slides over and snaps onto the right locking rib, thus completing the fixation of the pressure plate and the ballast bottom beam.

[0019] After adopting the above solution, the beneficial effects of the present invention compared with the prior art are as follows: The pressure plate structure of the present invention is novel and ingenious. By using the left snap-fit ​​part as the rotation fulcrum, and in conjunction with the left and right undercuts, a simple, continuous and fast installation process of "snap-press-rotate-push-in" is realized. No tools are required, which greatly improves the installation efficiency and reduces the labor intensity and operation difficulty of the installers.

[0020] After the pressure plate and the ballast bottom beam are assembled and fixed, the present invention forms a multi-directional limiting structure, which is highly reliable and stable. Specifically, through the left and right locking parts, the two sides of the pressure plate directly form a rigid vertical limiting with the ballast bottom beam, ensuring that the pressure plate will not tilt under any circumstances, greatly improving safety and reliability. Attached Figure Description Figure 1 This is a perspective view of the pressure plate of the present invention; Figure 2 This is a front view of the pressure plate of the present invention; Figure 3 This is a perspective view of the pressure plate fixing system of the present invention; Figure 4 This is a schematic diagram of the assembly steps of the pressure plate fixing system of the present invention. Figure 1 ; Figure 5 for Figure 4 The main view; Figure 6 This is a schematic diagram of the assembly steps of the pressure plate fixing system of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the assembly steps of the pressure plate fixing system of the present invention. Figure 3 ; Figure 8 This is a schematic diagram of the assembly steps of the pressure plate fixing system of the present invention. Figure 4 ; Figure 9 This is a schematic diagram of the assembly steps of the pressure plate fixing system of the present invention. Figure 5 ; Figure 10 This is a schematic diagram of the assembly steps of the pressure plate fixing system of the present invention. Figure 6 .

[0021] Label Explanation Ballast bottom beam 100, middle sink groove 10, left side reinforcement 11, right side reinforcement 12, left locking reinforcement 13, right locking reinforcement 14; Pressure plate 200, plate body 2; left side snap-fit ​​part 3, protrusion 31, upper protrusion 311, lower protrusion 312, clearance space 32, upper clearance space 321, lower clearance space 322; right side snap-fit ​​part 4; left side locking part 5, left undercut 51, guide slope 511; right side locking part 6, right undercut 61, first arm part 62, second arm part 63. Detailed Implementation The following detailed explanation of the specific implementation method will be provided.

[0022] This case relates to a quick-installation pressure plate 200 for a ballast bottom beam, which is fixedly assembled above a ballast bottom beam 100. The ballast bottom beam 100 is provided with a left-side rib 11, a right-side rib 12, and a left-side locking rib 13 and a right-side locking rib 14 located on the middle recessed groove 10.

[0023] like Figure 1-2 As shown, the quick-installation pressure plate 200 for the ballast bottom beam is a plate body 2; the bottom of the plate body 2 is provided with a left side snap-fit ​​part 3, a right side snap-fit ​​part 4, a left side locking part 5 and a right side locking part 6.

[0024] Both the left-side locking part 3 and the right-side locking part 4 can engage with the corresponding reinforcing bars (left-side reinforcing bar 11 and right-side reinforcing bar 12) of the ballast bottom beam 100 in the left-right direction to achieve vertical positioning. The left-side locking part 3 is provided with a protrusion 31 as a rotation fulcrum and an avoidance space 32 constructed by the protrusion 31.

[0025] The left locking part 5 and the right locking part 6 are disposed between the left latching part 3 and the right latching part 4. The left locking part 5 has a left undercut 51, which is vertically positioned below the left latching part 3. The latching direction of the left undercut 51 is opposite to the latching direction of the left latching part 3 and is obliquely upward. The right locking part 6 has a right undercut 61, which is vertically positioned below the right latching part 4. The latching direction of the right undercut 61 is opposite to the latching direction of the right latching part 4.

[0026] The ballast bottom beam 100 and the pressure plate 200 constitute a pressure plate fixing system. The present invention also relates to a method for assembling the pressure plate fixing system, comprising the following steps: S1: See Figure 4-5 Align the left side snap-fit ​​part 3 of the pressure plate 200 with and push it into the left side rib 11 of the ballast bottom beam 100, so that the protrusion 31 in the left side snap-fit ​​part 3 cooperates with the left side rib 11 to form a rotation fulcrum. S2: See also Figure 6-9 With the pivot point as the axis, the pressure plate 200 is rotated and pressed down toward the ballast bottom beam 100 until the left buckle 51 is pressed in and fastened to the lower edge of the left locking rib 13 of the ballast bottom beam 100. At this time, the right snap part 4 is aligned with the right rib 12, and the right buckle 61 undergoes elastic deformation due to pressure. S3: See also Figure 10 Push the pressure plate 200 to the left so that the right snap-fit ​​part 4 engages with the right rib 12. At the same time, the right buckle 61 slides over and snaps onto the right locking rib 14, thus fixing the pressure plate 200 to the ballast bottom beam 100.

[0027] The pressure plate 200 of this invention has a novel and ingenious structural design. By using the left snap-fit ​​part 3 as a rotation fulcrum, and in conjunction with the left undercut 51 and the right undercut 61, it realizes a simple, continuous and fast installation process of "snap-press-rotate-push-in". No tools are required, which greatly improves the installation efficiency and reduces the labor intensity and operation difficulty of the installers.

[0028] The left and right locking parts 3 and 4 effectively restrict the vertical displacement of the pressure plate 200, thus limiting its vertical movement. The two opposite left and right undercuts 51 and 61 together limit the pressure plate 200, forming a stable and reliable multi-directional limit. The left undercut 51 is pressed into the lower edge of the left locking rib 13 by rotating the pressure plate 200, thus limiting its vertical movement. Then, the pressure plate 200 is pushed to the left, and the right locking part 4 is pushed into the right rib 12. The right undercut 61 is fastened to the right locking rib 14, forming a rightward undercut limit. This achieves a stable fixation between the pressure plate 200 and the ballast beam 100, preventing loosening due to vibration or external force.

[0029] When the pressure plate 200 is rotated into the ballast bottom beam 100, the mutual inverted locking function of the left inverted buckle 51 and the left locking rib 13 is completed first, so that the pressure plate 200 will not spring back. Then, when it is pushed into the left side, it is not necessary to apply downward pressing and leftward pushing forces at the same time. The installation operation is simple, precise and labor-saving.

[0030] The present invention, through the left snap-fit ​​part 3 and the right snap-fit ​​part 4, forms a rigid vertical limit with the ballast bottom beam 100 directly on both sides of the pressure plate 200, ensuring that the pressure plate 200 will not tilt under any circumstances, greatly improving safety and reliability.

[0031] This invention employs a unique "click-press-rotate-push-in" installation method. Its core operations are completed in the vertical direction and within a limited lateral range, with no spatial requirements on the length of the ballast bottom beam 100. This allows installation to be carried out directly in any position, greatly expanding the adaptability of the installation scenario.

[0032] For the preferred solution, please refer to [link / reference]. Figure 2 Both the left snap-fit ​​part 3 and the right snap-fit ​​part 4 are U-shaped grooves, and the depth H1 of the U-shaped groove of the left snap-fit ​​part 3 is greater than the depth H2 of the U-shaped groove of the right snap-fit ​​part 4.

[0033] The U-shaped groove of the left locking part 3 is relatively deep, providing ample swing space for the pressure plate 200 to rotate and press down during the initial installation, ensuring smooth rotation. In addition, the relatively deep groove design of the left locking part 3 ensures that after the left side is pushed into place, the left rib 11 is still effectively wrapped in a certain depth of the left locking part 3, forming a balanced vertical constraint together with the right locking part 4. This, together with the inverted structure in the middle (left inverted buckle 51 and right inverted buckle 61), ensures the firmness and reliability of the final locking.

[0034] Preferred solutions, such as Figure 1-2 As shown, the card interface of the left card connector 3 and the card interface of the right card connector 4 face each other, the fastening direction of the left buckle 51 is tilted to the upper left, and the fastening direction of the right buckle 61 is set horizontally to the right.

[0035] The opposing locking interfaces ensure that the pressure plate 200 can evenly grip the ballast beam 100 from both sides when it is finally fixed, resulting in a stable and secure structure. The left inverted buckle 51 is tilted upwards to the left and can resist both upward and leftward forces; the right inverted buckle 61 is horizontally locked to the right and specifically resists rightward forces, thus forming an effective two-way locking mechanism with extremely high stability.

[0036] Preferred solutions, such as Figure 2As shown, the protrusion 31 includes an upper protrusion 311 and a lower protrusion 312, and the clearance space 32 correspondingly includes an upper clearance space 321 located on the side of the upper protrusion 311 and a lower clearance space 322 located on the side of the lower protrusion 312.

[0037] The design of the upper protrusion 311 and the lower protrusion 312 makes the left side snap-fit ​​part 3 and the left side rib 11 of the ballast bottom beam 100 form two contact points, one above the other, achieving a precise and stable fit with the left side rib 11. This greatly enhances the stability and strength of the pivot point, preventing the pressure plate 200 from shaking or coming off during rotation.

[0038] Preferred solutions, such as Figure 2 As shown, the upper protrusion 311 and the lower protrusion 312 are staggered in the vertical plane, with the upper part on the right and the lower part on the left. This increases the contact area between the entire protrusion 31 and the left-side rib 11, resulting in a more uniform stress distribution. In addition, the staggered arrangement provides better fault tolerance, allowing for smooth assembly even with minor deviations.

[0039] Preferred solutions, such as Figure 1-2 As shown, the left locking part 5 includes an elastic cantilever part 52 extending downwardly from the bottom of the plate body 2, and the left buckle 51 is formed at the end of the elastic cantilever part 52. The elastic cantilever part 52 gives the left buckle 51 a certain elastic deformation capability. During installation, this elasticity allows the left buckle 51 to slide smoothly over the left locking rib 13; after locking, the elastic force ensures the tightness of the fastening, realizing reliable one-way locking.

[0040] Preferred solutions, such as Figure 1-2 As shown, a guide slope 511 is provided on the outer side of the end of the left buckle 51. The guide slope 511 allows the left buckle 51 to slide smoothly along the edge of the left locking rib 13 during the rotation and pressing process, instead of causing a hard collision, making the installation process easier and smoother.

[0041] Preferred solutions, such as Figure 1-2 As shown, the right-side locking portion 6 includes a first arm 62 extending downward from the bottom of the plate body 2 and a second arm extending approximately horizontally from the end of the first arm 62. The right buckle 61 is located at the free end of the second arm 63. The first arm 62 and the second arm 63 form an "L"-shaped lever structure, allowing the right buckle 61 to generate effective elastic displacement through the deformation of the second arm 63 when compressed, thereby smoothly sliding into the locking position.

[0042] In a preferred embodiment, the pressure plate 200 is a one-piece metal stamping part or an engineering plastic injection molded part. The one-piece molding process ensures the overall structural strength of the pressure plate 200 and extends its service life.

[0043] The present invention also relates to a pressure plate fixing system, including a ballast bottom beam 100 and a pressure plate, wherein the pressure plate is a quick-install pressure plate 200 for the ballast bottom beam described above.

[0044] The ballast bottom beam 100 is provided with a left-side reinforcing bar 11, a right-side reinforcing bar 12, and a left-side locking reinforcing bar 13 and a right-side locking reinforcing bar 14 located on the middle sinking groove 10; wherein, the left-side snap-fit ​​part 3 snaps into the left-side reinforcing bar 11, and the right-side snap-fit ​​part 4 snaps into the right-side reinforcing bar 12, together achieving vertical and horizontal limiting; the left buckle 51 snaps into the lower edge of the left locking reinforcing bar 13 to achieve vertical and horizontal limiting, and the right buckle 61 snaps into the side edge of the left locking reinforcing bar 13 to achieve horizontal and horizontal limiting.

[0045] The pressure plate 200 and the ballast bottom beam 100 are fixedly connected by a pressing type. The left snap-fit ​​part 3 first snaps into the left rib 11 and forms a rotation fulcrum. The pressure plate 200 rotates around the fulcrum toward the ballast bottom beam 100, so that the left buckle 51 snaps into the lower edge of the left locking rib 13, while the right buckle 61 undergoes elastic deformation. The pressure plate 200 slides to the left, so that the right snap-fit ​​part 4 snaps into the right rib 12, while the right buckle 61 restores its deformation and snaps into the right locking rib 14, thereby fixing the pressure plate 200 and the ballast bottom beam 100 in the vertical and horizontal directions.

[0046] like Figure 4-10 As shown, the specific installation steps of the pressure plate fixing system of the present invention are as follows: S1: As Figure 4-5 First, align the left snap-fit ​​part 3 of the pressure plate 200 with the left reinforcing bar 11 of the ballast bottom beam 100; S2: As Figure 6 Push the left snap-fit ​​part 3 of the pressure plate 200 into the left reinforcing bar 11 of the ballast bottom beam 100, wherein the lower protrusion 312 is aligned with the lower edge of the left reinforcing bar 11 and the upper protrusion 311 is aligned with the upper edge of the left reinforcing bar 11, and press it in until it is fully inserted. S3: As Figure 7-8 Rotate the pressure plate 200 clockwise so that the left undercut 51 of the pressure plate 200 contacts the left locking rib 13 and continue pressing in. At this time, the right undercut 61 is squeezed and deformed in the direction shown in the figure. S4: As Figure 9 As the pressure plate 200 continues to rotate, the left inverted buckle 51 of the pressure plate 200 presses into the lower edge of the left locking rib 13, forming an inverted structure. The pressure plate 200 will not spring back. At this time, the right snap-fit ​​part 4 of the pressure plate 200 is just aligned with the right rib 12. S5: As Figure 10Push the pressure plate 200 to the left so that the right side snap-fit ​​part 4 of the pressure plate 200 snaps into the right side rib 12. At this time, the left and right side snap-fit ​​parts (left side snap-fit ​​part 3 and right side snap-fit ​​part 4) of the pressure plate 200 and the left and right side ribs (left side rib 11 and right side rib 12) of the ballast bottom beam 100 form upper and lower limits. After pushing in, the right buckle 61 slides over and snaps into the right locking rib 14, and the pressure plate 200 is fixed in the right direction, thus completing the fixation of the pressure plate 200 and the ballast bottom beam 100.

[0047] Thus, the pressure plate 200 and the ballast bottom beam 100 are effectively fixed in the vertical and horizontal directions, forming a stable system structure.

[0048] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

1. A quick-mounting compression plate for ballast girder, characterized in that: A plate body; a bottom of the plate body is provided with: A left side clamping part and a right side clamping part, both of which are capable of clamping corresponding ribs of the ballast bottom beam in the left-right direction to achieve limiting in the up-down direction; a protruding part as a rotating fulcrum is arranged in the left side clamping part, and an avoiding space is formed by the protruding part; A left side locking part and a right side locking part are arranged between the left side clamping part and the right side clamping part; the left side locking part has a left reverse buckle below the left side clamping part in the vertical direction, and the clamping direction of the left reverse buckle is opposite to the clamping direction of the left side clamping part and is obliquely arranged upward; the right side locking part has a right reverse buckle below the right side clamping part in the vertical direction, and the clamping direction of the right reverse buckle is opposite to the clamping direction of the right side clamping part.

2. A quick-mounting compression plate for a ballast keel as claimed in claim 1, characterized in that: Both of the left side clamping part and the right side clamping part are U-shaped grooves, and the U-shaped groove depth of the left side clamping part is greater than the U-shaped groove depth of the right side clamping part.

3. A quick-mounting compression plate for a ballast keel according to claim 1, characterized in that: The clamping interfaces of the left side clamping part and the right side clamping part are oppositely arranged, the clamping direction of the left reverse buckle is obliquely arranged to the left upper side, and the clamping direction of the right reverse buckle is horizontally arranged to the right side.

4. A quick-mounting compression plate for a ballast keel according to claim 1, characterized in that: The protruding part includes an upper protruding part and a lower protruding part, and the avoiding space includes an upper avoiding space on the side of the upper protruding part and a lower avoiding space on the side of the lower protruding part.

5. A quick-fit compression plate for a ballastable bottom beam according to claim 4, characterized in that: The upper protruding part and the lower protruding part are arranged in a staggered manner in the vertical plane as upper right lower left.

6. A quick-mounting compression plate for a ballast keel according to claim 1, characterized in that: The left side locking part includes an elastic cantilever part obliquely extending downward from the bottom of the plate body, and the left reverse buckle is formed at the end of the elastic cantilever part; a guide inclined surface is arranged outside the end of the left reverse buckle.

7. A quick-mounting compression plate for a ballast keel according to claim 1, characterized in that: The right side locking part includes a first arm part extending downward from the bottom of the plate body and a second arm part extending substantially horizontally from the end of the first arm part, and the right reverse buckle is arranged at the free end of the second arm part.

8. A press plate fixation system characterized by: The ballast bottom beam quick-assembly pressure plate includes a ballast bottom beam and the pressure plate of any one of claims 1-7.

9. A clamp plate fastening system as claimed in claim 8, wherein: The ballast bottom beam is provided with a left side rib, a right side rib, and a left locking rib and a right locking rib arranged on the middle sunken groove; the left side clamping part is clamped with the left side rib, and the right side clamping part is clamped with the right side rib, to jointly achieve limiting in the up-down direction; the left reverse buckle is buckled with the lower edge of the left locking rib to achieve limiting in the up-down direction and the left-right direction, and the right reverse buckle is buckled with the side edge of the left locking rib to achieve limiting in the left-right direction.

10. An assembly method of a pressure plate fixing system, using the pressure plate fixing system of any one of claims 8-9, the assembly steps comprising the following steps: S1: aligning and pushing the left side clamping part of the pressure plate into the left side rib of the ballast bottom beam, so that the protruding part in the left side clamping part cooperates with the left side rib to form a rotating fulcrum; S2: rotating and pressing the pressure plate towards the ballast bottom beam with the rotating fulcrum as the axis, until the left reverse buckle is pressed into and buckled with the lower edge of the left locking rib of the ballast bottom beam, at this time the right side clamping part is aligned with the right side rib, and the right reverse buckle is elastically deformed due to the pressure; S3: push the pressing plate to the left side, make the right side clamping part and the right side rib clamping cooperation, at the same time, the right inverted slip through and clamping on the right locking rib, complete the fixing of the pressing plate and the ballast girder.

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