Jacking and supporting device for assembly

Abstract

The invention discloses a jacking and supporting device for assembly. The jacking and supporting device comprises a first supporting table and a second supporting table, the rotary driving device is connected to the first supporting table; the second supporting table is connected with the driving end of the rotary driving device, and a first through hole is formed in the second supporting table; the supporting seat is arranged below the second supporting table; the sliding rail is arranged on the supporting seat and connected with a sliding block, and the sliding block is connected with a push-pull driving device; the supporting block is fixedly connected with the sliding block; when the tray for containing the speed reducer shell moves to the position above the assembling jacking supporting device, the jacking driving device jacks the first supporting table to the supporting position, the push-pull driving device drives the sliding block to slide, and the supporting block abuts against the second supporting table; therefore, the support block and the support seat bear the counter-acting force generated when accessories are assembled on the speed reducer shell, and the jacking driving device is prevented from being damaged due to stress.

Description

Assemble lifting support device Technical Field

[0001] This invention relates to the field of transmission assembly technology, specifically an assembly lifting support device. Background Technology

[0002] In the field of automotive gearbox assembly line technology, multiple processes such as press-fitting bearings, installing pins, and screwing are required on the gearbox housing. To address this, CN220881306U discloses a lifting and rotating mechanism for a transmission assembly line. This mechanism lifts a pallet and then rotates it via a rotating mechanism, thereby turning the transmission housing on the pallet to an angle suitable for assembly. During assembly, the transmission housing and pallet rely entirely on a rotating plate for support, which in turn relies solely on a lifting cylinder for support. When assembling components such as oil seals, bushings, and flanges, a significant force is applied to the transmission housing, making it easy to damage the lifting cylinder during assembly. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides an assembly lifting support device, which has multiple operating modes, including:

[0004] In Mode 1, after the second support platform lifts the pallet, the support block moves to abut against the second support platform to support it. This allows the support block to bear the reaction force generated during assembly, thus protecting the lifting drive device.

[0005] In mode two, after the second support platform lifts the pallet, the support block moves to abut against the second support platform to support it. The anti-lift support device is activated, causing the tooling on the support shaft to abut against the bearing seat of the gearbox housing for press-fitting of the guide bearing.

[0006] In Mode 3, after the second support platform lifts the tray, the second support platform rotates to rotate the gearbox housing on the tray to an angle that facilitates assembly.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: an assembly lifting support device, comprising:

[0008] A first support platform, which can move between an initial position and a supported position;

[0009] The second support platform is rotatably mounted on the first support platform and is used to support the workpiece to be assembled.

[0010] A support base, wherein a support block is provided on the support base, and the support block is movably mounted on a slide rail;

[0011] When the first support platform moves to the support position, the support block can move along the slide rail to abut against the second support platform.

[0012] Through the above technical solution, when the pallet holding the reducer housing on the production line moves above the assembly lifting support device, the first support platform moves to the support position, allowing the second support platform to support the pallet. The support block moves to abut against the second support platform, thereby strengthening the support strength of the device by bearing the reaction force generated when assembling the reducer housing parts using the support block and support base. After the parts are assembled, the support block moves to disengage from the second support platform, and the second support platform rotates, causing the gearbox housing on the pallet to rotate to an angle convenient for assembly.

[0013] Furthermore, the second support platform is provided with a first through hole. When the first support platform is in its initial position, the support block is inserted into the first through hole. When the first support platform moves to its support position, the support block can move along the slide rail to abut against the second support platform. With this design, the support block can be completely positioned below the second support platform, thereby reducing the overall space occupied by the device.

[0014] Furthermore, it includes at least two slide rails distributed on opposite sides of the second support platform. Each slide rail is slidably connected to a first slider and a second slider. The first slider is connected to a first support block, and the second slider is connected to a second support block.

[0015] The second support platform is provided with first through holes corresponding to the first support block and the second support block respectively.

[0016] The above technical solution includes at least four support blocks distributed around the second support platform, which further enhances the stability of the second support platform.

[0017] Furthermore, the second support platform has a first protrusion and a second protrusion on the side facing the support base. The first protrusion and the second protrusion are respectively located on the moving paths of the first support block and the second support block. The end faces of the first support block and the second support block facing the second support platform are respectively set as a first inclined plane and a second inclined plane. The first inclined plane and the second inclined plane face opposite directions. The end faces of the first protrusion and the second protrusion facing the support base are parallel to the first inclined plane and the second inclined plane, respectively.

[0018] Furthermore, it also includes a counter-support device disposed on the first support platform, the first support platform having a second through hole, the counter-support device comprising:

[0019] A drive cylinder is fixedly connected to the first support platform;

[0020] A support shaft is fixedly connected to the drive end of the drive cylinder. The upper end of the support shaft is provided with a tool for supporting the bearing seat. Under the drive of the drive cylinder, the tool can move through the second through hole to the press-fit position. The support shaft is also provided with a support part that protrudes radially. The bottom surface of the support part is set as a third inclined surface.

[0021] A wedge block is movably disposed on the upper surface of the first support platform, and the top surface of the wedge block is parallel to the third inclined surface;

[0022] A wedge cylinder is connected to the first support platform, and the drive end of the wedge cylinder is connected to the wedge. When the tooling is in the pressing position, the wedge cylinder can drive the wedge to move to abut against the support.

[0023] Through the above technical solution, the assembly lifting support device disclosed in this application can also realize the press-fitting process of the guide bearing. The steps are as follows: when the tray on the production line that holds the reducer housing moves to the top of this assembly lifting support device, the first support platform moves to the support position so that the second support platform carries the tray, the support block moves to abut against the second support platform, the anti-lifting support device is activated so that the tooling on the support shaft abuts against the bearing seat of the gearbox housing for press-fitting of the guide bearing.

[0024] Furthermore, the first support platform is provided with a third through hole, and a first linear bearing is connected to the third through hole, with the support shaft passing through the first linear bearing.

[0025] Furthermore, it also includes a blocking mechanism, which includes a blocking bracket fixed on a support base, a blocking device fixedly connected to the blocking bracket, and a blocking cylinder connected to the blocking device for blocking the pallet on which workpieces are placed on the production line.

[0026] Furthermore, the second support platform is provided with at least one positioning pin, which is used to engage with the pin hole of the pallet on the production line to fix the pallet.

[0027] Furthermore, the second support platform is connected to a rotary drive device, the rotary drive device comprising:

[0028] The motor is fixed on the first support platform;

[0029] A rack, which is connected to the drive end of the motor;

[0030] A drive gear is rotatably connected to the first support platform and meshes with the rack. The upper end face of the drive gear is connected to the second support platform.

[0031] Through the above technical solution, the motor can drive the rack to move, thereby driving the drive gear to rotate the second support platform.

[0032] Furthermore, the first support platform and the lifting drive device are connected by a floating joint.

[0033] Furthermore, the support base is provided with at least one mounting hole, a second linear bearing is fixed in the mounting hole, a guide rod is provided in the second linear bearing, and the guide rod is connected and fixed to the second support platform.

[0034] By employing the above technical solutions, the beneficial effects of the present invention are as follows:

[0035] 1. In this application, when the tray on the production line containing the reducer housing moves above the assembly lifting support device, the lifting drive device lifts the first support platform to the support position so that the second support platform carries the tray. The push-pull drive device drives the slider to slide so that the support block abuts against the second support platform. Thus, the support block and the support base bear the reaction force generated when assembling the reducer housing, avoiding damage to the lifting drive device.

[0036] 2. In this application, when the tray on the production line that holds the reducer housing moves to the top of the assembly lifting support device, the lifting drive device lifts the first support platform to the support position so that the second support platform can bear the tray. The push-pull drive device drives the slider to slide so that the support block abuts against the second support platform. At this time, the anti-lift support device can be activated so that the tooling on the support shaft abuts against the bearing seat of the gearbox housing for press-fitting of the guide bearing.

[0037] 3. In this application, when the tray on the production line that holds the reducer housing moves above the assembly lifting support device, the lifting drive device lifts the first support platform to the support position so that the second support platform can support the tray. Then, the rotation drive device can drive the second support platform to rotate so that the gearbox housing on the tray can rotate to an angle that is convenient for assembly.

[0038] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 is a schematic diagram of the overall structure of the jacking support device in an embodiment of the present invention;

[0041] Figure 2 is a side cross-sectional view of the assembled lifting support device in an embodiment of the present invention;

[0042] Figure 3 is a schematic diagram of the structure of the jacking support device without the second support plate in an embodiment of the present invention;

[0043] Figure 4 is a schematic diagram of the support mechanism in an embodiment of the present invention;

[0044] Figure 5 is a schematic diagram of the structure of the anti-top support device in an embodiment of the present invention.

[0045] The reference numerals in the above figures are as follows: 1. Lifting mechanism; 11. First support platform; 12. Lifting drive device; 2. Rotating mechanism; 21. Rotating drive device; 22. Second support platform; 221. First through hole; 222. Positioning pin; 3. Support mechanism; 31. Support seat; 32. Slide rail; 33. Slider; 331. First slider; 332. Second slider; 34. Push-pull drive device; 35. Support block; 351. First support block; 3511. First inclined plane; 352. Second support block; 3521. Second inclined plane; 36. Column; 37. Stop block; 4. Anti-lifting support device; 41. Drive cylinder; 42. Support shaft; 421. Tooling; 422. Support part; 43. Wedge block; 44. Wedge block cylinder; 51. Stopper bracket; 52. Stopper. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that in the description of this invention, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] Example: This example discloses an assembly lifting support device, as shown in Figure 1, which includes a lifting mechanism 1, a rotating mechanism 2, a support mechanism 3, and a reverse lifting support device 4.

[0049] As shown in Figure 2, the lifting mechanism 1 includes a first support platform 11, which is connected to at least two spaced-apart lifting drive devices 12. Under the drive of the lifting drive devices 12, the first support platform 11 moves between an initial position and a supported position. The lifting drive device 12 can be any one of a linear motor, a lead screw, or a telescopic cylinder.

[0050] In some feasible embodiments, the first support platform 11 and the lifting drive device 12 are connected by a floating joint.

[0051] As shown in Figure 2, the rotating mechanism 2 includes a rotating drive device 21, which is connected to the first support platform 11. The driving end of the rotating drive device 21 is connected to a second support platform 22. Under the drive of the rotating drive device 21, the second support platform 22 can rotate by a preset angle.

[0052] The rotary drive device 21 includes a motor and a hollow rotary platform connected to the drive end of the motor. The hollow rotary platform includes a rack connected to the drive end of the motor and a drive gear meshing with the rack. The drive gear is rotatably connected to the first support platform 11, and the upper end face of the drive gear is connected to the second support platform 22. With this design, the motor can drive the rack to move, thereby driving the drive gear to rotate the second support platform 22.

[0053] In some feasible embodiments, the motor can be a servo motor, a rotary cylinder, or other device, and the rack can be replaced with a chain, belt, or other transmission device.

[0054] As shown in Figure 1, the second support platform 22 is provided with a first through hole 221. The second support platform 22 is also provided with at least one positioning pin 222, with each positioning pin 222 distributed at one of the four corners of the second support platform 22. The positioning pin 222 is used to engage with the pin holes of the pallet on the production line to fix the pallet. The positioning pin 222 can be a positioning prism pin or a positioning round pin.

[0055] Referring to Figures 1 and 3, the support mechanism 3 includes a support base 31, which is located below the second support platform 22. A slide rail 32 is provided on the support base 31, and a slider 33 is slidably connected to the slide rail 32. The slider 33 is connected to a push-pull drive device 34, and the slider 33 is also connected to a support block 35. When the first support platform 11 is in its initial position, as shown in Figure 1, the support block 35 is inserted into the first through hole 221. When the lifting drive device 12 moves the first support platform 11 to the support position, as shown in Figure 2, the push-pull drive device 34 can drive the support block 35 to move away from the first through hole 221, causing the support block 35 to abut against the second support platform 22.

[0056] In some feasible embodiments, the support block 35 can move along the slide rail 32 to a position below the second support platform, meaning that the first through hole 221 is not required in this solution. When the first support platform 11 is in its initial position, the support block 35 moves along the slide rail 32 to a position below the second support platform. When the first support platform 11 moves to the support position, the push-pull drive device 34 drives the support block 35 to move below the second support platform 22, causing the support block 35 to abut against the second support platform 22.

[0057] The push-pull drive device 34 can be any one of a linear motor, a lead screw, or a telescopic cylinder.

[0058] In some feasible embodiments, the support base 31 is provided with at least one mounting hole, a second linear bearing is fixed in the mounting hole, a guide rod is provided in the second linear bearing, and the guide rod is connected and fixed to the second support platform 22.

[0059] With the above technical solution, when the tray holding the reducer housing on the production line moves above the assembly lifting support device, the lifting drive device 12 lifts the first support platform 11 to the support position, so that the second support platform 22 carries the tray. The push-pull drive device 34 drives the slider 33 to slide, so that the support block 35 abuts against the second support platform 22. Thus, the support block 35 and the support base 31 bear the reaction force generated when assembling the reducer housing, preventing the lifting drive device 12 from being damaged by the force. After the parts are assembled, the push-pull drive device 34 drives the slider 33 to slide, so that the support block 35 moves below the first through hole 221. The rotation drive device 21 drives the second support platform 22 to rotate, so that the gearbox housing on the tray rotates to an angle that is convenient for assembly.

[0060] The assembly lifting support device also includes a blocking mechanism, which includes a blocking bracket 51 fixed to the support base 31. A blocking device 52 is fixedly connected to the blocking bracket 51, and the blocking device 52 is connected to a blocking cylinder for blocking the pallet on the production line where workpieces are placed. When the pallet containing the reducer housing moves above the assembly lifting support device on the production line, the blocking cylinder drives the blocking device 52 to rise, positioning the pallet above the assembly lifting support device. After assembly, the blocking cylinder drives the blocking device 52 to fall, allowing the pallet to move to the next process.

[0061] In some feasible embodiments, as shown in Figures 3 and 4, two support mechanisms 3 are included, distributed on opposite sides of the second support platform 22. Each support mechanism 3 includes at least two spaced columns 36, which are bolted to the support base 31. A slide rail 32 is connected to the top of each column 36, and a first slider 331 and a second slider 332 are slidably connected to the slide rail 32. The first slider 331 is connected to a first support block 351, and the second slider 332 is connected to a second support block 352. It should be noted that the second support platform 22 has first through holes 221 corresponding to the first support block 351 and the second support block 352, respectively.

[0062] The column 36 is used to raise the slide rail 32 to ensure that, in the initial state, each of the first support blocks 351 and the second support blocks 352 can be inserted into the corresponding first through holes 221.

[0063] As shown in Figure 4, the first slider 331 and the second slider 332 are connected to the same push-pull drive device 34. The first slider 331 and the second slider 332 are configured in an I-shape. Two stop blocks 37 are also connected to the slide rail 32. Each stop block 37 has a groove, and the two stop blocks are respectively fitted onto the I-shaped first slider 331 and the second slider 332 through the groove. The stop blocks 37 can block at both ends of the I-shaped first slider 331 and the second slider 332 to limit the movement range of the first slider 331 and the second slider 332.

[0064] The second support platform 22 has a first protrusion and a second protrusion on the side facing the support base 31. The first protrusion and the second protrusion are respectively located on the moving paths of the first support block 351 and the second support block 352. As shown in Figure 4, the end faces of the first support block 351 and the second support block 352 facing the second support platform 22 are respectively set as a first inclined surface 3511 and a second inclined surface 3521. The first inclined surface 3511 and the second inclined surface 3521 face opposite directions, and the end faces of the first protrusion and the second protrusion facing the support base 31 are parallel to the first inclined surface 3511 and the second inclined surface 3521, respectively.

[0065] As shown in Figures 1, 3, and 5, the first support platform 11 is provided with a second through hole, and the anti-top support device 4 includes:

[0066] A drive cylinder 41 is fixedly connected to the first support platform 11;

[0067] A support shaft 42 is fixedly connected to the drive end of the drive cylinder 41. The upper end of the support shaft 42 is provided with a tool 421 for supporting the bearing seat. Under the drive of the drive cylinder 41, the tool 421 can move through the second through hole to the press-fit position. The support shaft 42 is also provided with a support part 422 that protrudes radially therefrom. The bottom surface of the support part 422 is set as a third inclined surface.

[0068] Wedge 43, the wedge 43 is movably disposed on the upper end face of the first support platform 11, and the top surface of the wedge 43 is parallel to the third inclined surface;

[0069] The wedge cylinder 44 is connected and fixed to the first support platform 11. The driving end of the wedge cylinder 44 is connected to the wedge 43. When the tooling 421 is in the pressing position, the wedge cylinder 44 can drive the wedge 43 to move to abut against the support part 422. That is, the assembly lifting support device disclosed in this application can also realize the press-fitting process of the guide bearing. The steps are as follows: When the tray on the production line that holds the reducer housing moves to the top of this assembly lifting support device, the lifting drive device 12 lifts the first support platform 11 to the support position, so that the second support platform 22 carries the tray. The push-pull drive device 34 drives the first slider 331 and the second slider 332 to slide in opposite directions, so that the first support block 351 and the second support block 352 abut against the first protrusion and the second protrusion respectively, so that the first support block 351 and the second support block 352 support the second support platform 22. The reverse lifting support device 4 is activated, so that the tooling 421 on the support shaft 42 abuts against the bearing seat of the gearbox housing for press-fitting of the guide bearing.

[0070] The first support platform 11 has a third through hole, through which a first linear bearing is connected. The support shaft 42 passes through the first linear bearing. The linear bearing ensures that the support shaft 42 can only move in the press-fit direction and enhances the load-bearing capacity of the support shaft 42. The drive cylinder 41 and the wedge cylinder 44 can also be replaced by any one of a linear motor, a lead screw, or an electric cylinder.

[0071] Through the above technical solutions, the assembly lifting support device disclosed in this application has the following working modes:

[0072] In Mode 1, the piston rod of the blocking cylinder extends, pushing the blocking device 52 into a blocking state. When the tray containing the reducer housing on the production line moves above the assembly lifting support device, it is blocked by the blocking device 52. The lifting drive device 12 lifts the first support platform 11 to the support position, and the second support platform 22 rises along with the first support platform 11, lifting the tray. The push-pull drive device 34 drives the first slider 331 and the second slider 332 to slide in opposite directions, so that the first support block 351 and the second support block 352 abut against the first protrusion and the second protrusion respectively, so that the first support block 351 and the second support block 352 support the second support platform 22. Thus, the first support block 351, the second support block 352, and the support base 31 bear the reaction force generated when assembling the reducer housing, avoiding damage to the lifting drive device 12.

[0073] In mode two, the piston rod of the blocking cylinder extends, pushing the blocking device 52 into a blocking state. When the tray containing the reducer housing on the production line moves above the lifting support device of this assembly, it is blocked by the blocking device 52. The lifting drive device 12 lifts the first support platform 11 to the support position, and the second support platform 22 rises along with the first support platform 11, lifting the tray. The push-pull drive device 34 drives the first slider 331 and the second slider 332 to slide in opposite directions, so that the first support block 351 and the second support block 352 abut against the first protrusion and the second protrusion respectively, so that the first support block 351 and the second support block 352 support the second support platform 22. The anti-lift support device 4 is activated, the drive cylinder 41 drives the support shaft 42 to rise, so that the tooling 421 abuts against the bearing seat of the gearbox housing, and the wedge cylinder 44 drives the wedge 43 to abut against the support part 422 of the support shaft 42, so that the support shaft 42 plays a rigid support role for press-fitting the guide bearing.

[0074] In mode three, the piston rod of the blocking cylinder extends, pushing the blocking device 52 into a blocking state. When the tray containing the reducer housing on the production line moves above the assembly lifting support device, it is blocked by the blocking device 52. The lifting drive device 12 lifts the first support platform 11 to a supporting position, and the second support platform 22 rises along with the first support platform 11, lifting the tray. The rotation drive device 21 drives the second support platform 22 to rotate, so that the gearbox housing on the tray rotates to an angle convenient for assembly.

[0075] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An assembly lifting support device, characterized in that, include: A first support platform, movable between an initial position and a support position; a second support platform, rotatably mounted on the first support platform, used to support the workpiece to be assembled; a support base, on which a support block is provided, movably mounted on a slide rail; wherein, when the first support platform moves to the support position, the support block can move along the slide rail to abut against the second support platform.

2. The assembly lifting support device as described in claim 1, characterized in that, The second support platform is provided with a first through hole. When the first support platform is in the initial position, the support block is inserted into the first through hole. When the first support platform moves to the support position, the support block can move along the slide rail to abut against the second support platform.

3. The assembly lifting support device as described in claim 2, characterized in that, It includes at least two slide rails distributed on opposite sides of the second support platform. Each slide rail is slidably connected to a first slider and a second slider. The first slider is connected to a first support block, and the second slider is connected to a second support block. The second support platform is provided with first through holes corresponding to the first support block and the second support block, respectively.

4. The assembly lifting support device as described in claim 3, characterized in that, The second support platform has a first protrusion and a second protrusion on the side facing the support base. The first protrusion and the second protrusion are respectively located on the moving paths of the first support block and the second support block. The end faces of the first support block and the second support block facing the second support platform are respectively set as a first inclined plane and a second inclined plane. The first inclined plane and the second inclined plane face opposite directions. The end faces of the first protrusion and the second protrusion facing the support base are parallel to the first inclined plane and the second inclined plane, respectively.

5. The assembly lifting support device as described in claim 1, characterized in that, It also includes a counter-support device disposed on the first support platform. The first support platform has a second through hole. The counter-support device includes: a drive cylinder, which is fixedly connected to the first support platform; a support shaft, which is fixedly connected to the drive end of the drive cylinder. The upper end of the support shaft is provided with a tool for supporting the bearing seat. Under the drive of the drive cylinder, the tool can move through the second through hole to the pressing position. The support shaft is also provided with a support portion that protrudes radially therefrom. The bottom surface of the support portion is set as a third inclined surface; a wedge, which is movably disposed on the upper end surface of the first support platform. The top surface of the wedge is parallel to the third inclined surface; and a wedge cylinder, which is connected to the first support platform. The drive end of the wedge cylinder is connected to the wedge. When the tool is in the pressing position, the wedge cylinder can drive the wedge to move to abut against the support portion.

6. The assembly lifting support device as described in claim 5, characterized in that, The first support platform is provided with a third through hole, and a first linear bearing is connected to the third through hole. The support shaft passes through the first linear bearing.

7. The assembly lifting support device as described in claim 1, characterized in that, It also includes a blocking mechanism, which includes a blocking bracket fixed on a support base, a blocking device fixedly connected to the blocking bracket, and a blocking cylinder connected to the blocking device for blocking the pallet on which workpieces are placed on the production line.

8. The assembly lifting support device as described in claim 1, characterized in that, The second support platform is provided with at least one positioning pin, which is used to engage with the pin hole of the pallet on the production line to fix the pallet.

9. The assembly lifting support device as described in claim 1, characterized in that, The second support platform is connected to a rotary drive device, which includes: a motor fixed on the first support platform; a rack connected to the drive end of the motor; and a drive gear rotatably connected to the first support platform and meshing with the rack, the upper end face of which is connected to the second support platform.

10. The assembly lifting support device as described in claim 1, characterized in that, The support base is provided with at least one mounting hole, and a second linear bearing is fixed in the mounting hole. A guide rod is provided in the second linear bearing, and the guide rod is connected and fixed to the second support platform.

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