Coating device for preparing waterproof felt

Abstract

The utility model discloses a coating device for waterproof felt preparation, and relates to the technical field of waterproof felt preparation. The felt coating device comprises a workbench and further comprises a coarse coating mechanism and a fine coating mechanism, the coarse coating mechanism is installed on the top of the workbench and used for conducting preliminary spraying and coating on felt, the fine coating mechanism is installed on the right side of the coarse coating mechanism and used for conducting further finishing on the felt, and the fine coating mechanism is installed on the right side of the coarse coating mechanism and used for conducting fine finishing on the felt. An unwinding device is installed on the left side of the top of the workbench, and a winding device is installed on the right side of the top of the workbench. The rough coating mechanism and the fine coating mechanism are arranged, specifically, a continuous covering layer is preliminarily formed through a large-flow liquid supply structure and a scraping plate of the rough coating mechanism, and then the felt is trimmed through a brushing plate in the fine coating mechanism, so that the thickness of a coating on the surface of the waterproof felt can be improved to be uniform and consistent; the waterproof performance difference caused by uneven coating thickness is avoided, and the overall quality of the product is improved.

Description

Technical Field

[0001] This utility model belongs to the field of waterproof felt preparation technology, and in particular relates to a coating device for preparing waterproof felt. Background Technology

[0002] In the existing manufacturing process of waterproof felt, waterproofing agents are usually applied to the felt surface by roller coating or dip coating. However, traditional coating devices are mostly single-segment structures, which are prone to problems such as uneven coating, excessive accumulation, or insufficient coating in some areas during the coating process, thus affecting the stability and durability of the waterproofing effect. Especially in large-format continuous production, due to the flexible characteristics of the felt itself, uneven stress and tensile deformation can occur, further aggravating the unstable coating effect. Therefore, a coating device for the preparation of waterproof felt is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a coating device for preparing waterproof felt. By setting up a coarse coating mechanism and a fine coating mechanism, specifically, the coarse coating mechanism uses a high-flow liquid supply structure and scraper to initially form a continuous covering layer, and then the fine coating mechanism uses a brush to trim the felt. This improves the uniformity of the coating thickness on the surface of the waterproof felt, solving the problem that traditional coating devices are mostly single-segment structures, which are prone to uneven coating, excessive accumulation, or insufficient coating in some areas during the coating process, thus affecting the stability and durability of the waterproof effect. Especially in large-format continuous production, the flexible nature of the felt itself can lead to uneven stress and tensile deformation, further aggravating the problem of unstable coating effect.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a coating device for preparing waterproof felt, comprising a workbench and further comprising:

[0006] A rough coating mechanism, mounted on top of a workbench, is used to perform preliminary spray coating on felt; and

[0007] A fine coating mechanism is installed to the right of the coarse coating mechanism, and the fine coating mechanism is used to further refine the felt;

[0008] The workbench has an unwinding device installed on the left side of its top and a winding device installed on the right side of its top.

[0009] Furthermore, the rough coating mechanism includes a spraying assembly, which is located on the right side of the unwinding device and connected to the top of the workbench. The spraying assembly adopts a high-flow-rate liquid supply structure and a preliminary spraying method, which can quickly form a continuous covering layer on the felt surface.

[0010] The spraying assembly includes a storage tank, and a stirring device is installed inside the storage tank.

[0011] Furthermore, the fine coating mechanism includes an adjustment component, which is located on the right side of the spray assembly and connected to the top of the worktable. The adjustment component is used to adjust the distance between the fine coating brush and the felt.

[0012] A finishing component, connected to the bottom output end of an adjusting component, is used for fine finishing of the coating on the felt surface; and

[0013] A flattening component is disposed on the right side of the trimming component and connected to the adjusting component. The flattening component is used to flatten the trimmed felt.

[0014] The adjustment component includes a support frame, which is configured in an n-shape.

[0015] Furthermore, support frames are welded to both the front and back of the top of the workbench. The two support frames are connected to the storage bin on their respective sides. A diversion water pump is installed at the bottom of the storage bin. The front and back of the diversion water pump are connected to the corresponding sides of the support frames. Several nozzles are installed at the bottom outlet of the diversion water pump. A water pump is installed on the right side of the storage bin. The water inlet of the water pump is connected to the outlet of the storage bin through a delivery pipe. The water outlet of the water pump is connected to the inlet of the diversion water pump through a delivery pipe.

[0016] Among them, the two support frames are internally connected to a guide roller, and a scraper is provided on the right side of the guide roller. The front and back of the scraper are connected to the right side of the support frame.

[0017] Furthermore, the bottom of the support frame is welded to the top of the workbench, an electric push rod is installed on the top of the support frame, scale lines are provided on the front of the support frame, a telescopic rod is connected to the bottom output end of the electric push rod, and a connecting bracket is connected to the side of the telescopic rod away from the electric push rod.

[0018] The connecting bracket is slidably connected to the support frame, and the support frame has openings on both the front and back sides.

[0019] Furthermore, the trimming assembly includes a movable frame, the top of which is welded to the side of the connecting bracket away from the electric push rod. A motor is mounted on the top of the movable frame. A connecting plate is provided inside the movable frame. A slot is opened at the bottom of the movable frame. An eccentric wheel is provided on the top of the connecting plate. The bottom output end of the motor is connected to the top of the eccentric wheel through a coupling. A limit groove is opened on the top of the connecting plate. The bottom of the eccentric wheel is connected to the connecting plate through the limit groove.

[0020] The movable frame is provided with a brush plate at the bottom, the connecting plate passes through the slot and extends to the bottom, the bottom of the connecting plate is welded to the top of the brush plate, and the bottom of the brush plate is provided with two guide rollers, which are connected to the support frame.

[0021] Furthermore, the flattening assembly includes a fixed roller connected to a support frame, an adjusting roller above the fixed roller, and grooves on both the front and back sides of the right side of the support frame. The front and back sides of the adjusting roller penetrate the support frame and extend into the grooves. A second motor is mounted on the front side of the support frame, and a mounting plate is connected to the back side of the second motor. The mounting plate is internally connected to the front shaft of the adjusting roller, and the output end of the back side of the second motor is connected to the front side of the adjusting roller via a coupling.

[0022] The support frame has two fixed plates welded to its front side. Limiting rods are connected to the left and right sides of the two fixed plates. The outer surfaces of the two limiting rods are slidably connected to the left and right sides of the mounting plate. A threaded rod is threadedly connected to the inside of the top fixed plate. The bottom of the threaded rod is rotatably connected to the inside of the mounting plate.

[0023] This utility model has the following beneficial effects:

[0024] 1. This utility model, by setting up a coarse coating mechanism and a fine coating mechanism, specifically, uses the high-flow liquid supply structure and scraper of the coarse coating mechanism to initially form a continuous covering layer, and then uses the brush plate in the fine coating mechanism to trim the felt, which can improve the uniformity of the coating thickness on the surface of the waterproof felt, avoid the difference in waterproof performance caused by uneven coating thickness, and improve the overall quality of the product.

[0025] 2. This utility model uses a flattening component, specifically a threaded rod that rotates clockwise. Because its outer surface is threadedly connected to the top fixed plate, the threaded rod moves upward, causing the mounting plate to move. The movement of the mounting plate causes the adjusting roller to move, thereby adjusting the distance between the fixed roller and the adjusting roller. The motor is started to drive the adjusting roller to rotate, which in turn drives the fixed roller to rotate through the felt. The two components convey and compress the felt, eliminating minor unevenness on the coating surface, making the coating surface smooth and flat, improving the appearance quality of the waterproof felt, enhancing the adhesion between the coating and the felt substrate, and improving the waterproof performance. Finally, the felt is collected by a winding device.

[0026] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the overall structure of the winding device of this utility model;

[0030] Figure 3 This is a schematic diagram of the overall structure of the spray assembly of this utility model;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of the support frame of this utility model;

[0032] Figure 5 This utility model Figure 4 A magnified structural diagram of A in the middle;

[0033] Figure 6 This is a schematic diagram of the overall structure of the adjusting roller of this utility model.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 111. Workbench; 112. Unwinding device; 113. Rewinding device; 2. Coating mechanism; 21. Spraying assembly; 211. Storage tank; 212. Mixing device; 213. Diverter pump; 214. Pump; 215. Conveying pipe; 216. Guide roller 1; 217. Scraper; 218. Spray nozzle; 219. Support frame; 3. Fine coating mechanism; 31. Adjustment assembly; 311. Support frame; 312. Scale line; 313. Electric push rod 314. Connecting bracket; 315. Opening; 316. Telescopic rod; 32. Trimming assembly; 321. Moving frame; 322. Brush plate; 323. Guide roller two; 324. Motor one; 325. Eccentric wheel; 326. Limiting groove; 327. Connecting plate; 33. Flattening assembly; 331. Motor two; 332. Fixed roller; 333. Adjusting roller; 334. Threaded rod; 335. Fixed plate; 336. Limiting rod; 337. Mounting plate. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Please see Figures 1-6 As shown, this utility model is a coating device for preparing waterproof felt, including a workbench 111, and further comprising:

[0038] Coating mechanism 2, mounted on top of workbench 111, is used for preliminary spray coating of felt; and

[0039] Fine coating mechanism 3 is installed to the right of coarse coating mechanism 2 and is used to further refine the felt.

[0040] The workbench 111 has an unwinding device 112 installed on the left side of its top and a winding device 113 installed on the right side of its top. The coarse coating mechanism 2 forms a continuous coating layer through its high-flow liquid supply structure and scraper 217. The fine coating mechanism 3 then uses a brush 322 to trim the felt, which improves the uniformity of the coating thickness on the surface of the waterproof felt. This avoids differences in waterproof performance caused by uneven coating thickness and improves the overall quality of the product.

[0041] The rough coating mechanism 2 includes a spraying assembly 21, which is located on the right side of the unwinding device 112 and connected to the top of the workbench 111. The spraying assembly 21 adopts a high-flow liquid supply structure and a preliminary spraying method, which can quickly form a continuous covering layer on the felt surface.

[0042] The spraying assembly 21 includes a storage tank 211, and a stirring device 212 is installed inside the storage tank 211.

[0043] The fine coating mechanism 3 includes an adjustment component 31, which is located on the right side of the spray assembly 21 and connected to the top of the workbench 111. The adjustment component 31 is used to adjust the distance between the fine finishing brush and the felt.

[0044] Trimming component 32 is connected to the bottom output end of adjusting component 31. Trimming component 32 is used for fine trimming of the coating on the felt surface; and

[0045] Flattening component 33 is located on the right side of trimming component 32 and connected to adjusting component 31. Flattening component 33 is used to flatten the trimmed felt.

[0046] The adjustment component 31 includes a support frame 311, which is n-shaped.

[0047] Support frames 219 are welded to the front and back of the top of the workbench 111. The two support frames 219 are connected to the storage box 211 on the corresponding side. A diversion water pump 213 is installed at the bottom of the storage box 211. The front and back of the diversion water pump 213 are connected to the corresponding side of the support frame 219. Several nozzles 218 are installed at the bottom outlet of the diversion water pump 213. A water pump 214 is installed on the right side of the storage box 211. The water inlet of the water pump 214 is connected to the outlet of the storage box 211 through a conveying pipe 215. The water outlet of the water pump 214 is connected to the inlet of the diversion water pump 213 through a conveying pipe 215.

[0048] Among them, the two support frames 219 are internally connected to the guide roller 216, and the guide roller 216 is provided with a scraper 217 on the right side. The front and back of the scraper 217 are connected to the right side of the support frame 219.

[0049] The bottom of the support frame 311 is welded to the top of the workbench 111. An electric push rod 313 is installed on the top of the support frame 311. A scale line 312 is provided on the front of the support frame 311. A telescopic rod 316 is connected to the bottom output end of the electric push rod 313. A connecting bracket 314 is connected to the side of the telescopic rod 316 away from the electric push rod 313.

[0050] The connecting bracket 314 is slidably connected to the support frame 311, and the support frame 311 has openings 315 on both the front and back sides.

[0051] The trimming assembly 32 includes a movable frame 321. The top of the movable frame 321 is welded to the side of the connecting bracket 314 away from the electric push rod 313. A motor 324 is installed on the top of the movable frame 321. A connecting plate 327 is provided inside the movable frame 321. A slot is opened at the bottom of the movable frame 321. An eccentric wheel 325 is provided on the top of the connecting plate 327. The bottom output end of the motor 324 is connected to the top of the eccentric wheel 325 through a coupling. A limiting groove 326 is opened on the top of the connecting plate 327. The bottom of the eccentric wheel 325 is connected to the connecting plate 327 through the limiting groove 326.

[0052] The bottom of the movable frame 321 is provided with a brush plate 322, and the connecting plate 327 passes through the slot and extends to the bottom. The bottom of the connecting plate 327 is welded to the top of the brush plate 322. The bottom of the brush plate 322 is provided with two guide rollers 323, and the two guide rollers 323 are connected to the support frame 311.

[0053] The flattening assembly 33 includes a fixed roller 332, which is connected to the support frame 311. An adjusting roller 333 is provided above the fixed roller 332. The front and back sides of the right side of the support frame 311 are provided with grooves. The front and back sides of the adjusting roller 333 pass through the support frame 311 and extend into the grooves. A second motor 331 is provided on the front side of the support frame 311. A mounting plate 337 is connected to the back side of the second motor 331. The inside of the mounting plate 337 is connected to the front shaft of the adjusting roller 333. The output end of the back side of the second motor 331 is connected to the front side of the adjusting roller 333 through a coupling.

[0054] The support frame 311 has two fixed plates 335 welded to its front. Limiting rods 336 are connected to the left and right sides of the interior of each fixed plate 335. The outer surfaces of the two limiting rods 336 are slidably connected to the left and right sides of the interior of the mounting plate 337. A threaded rod 334 is threadedly connected to the interior of the top fixed plate 335. The bottom of the threaded rod 334 is rotatably connected to the interior of the mounting plate 337. Rotating the threaded rod 334 clockwise causes its outer surface to be threadedly connected to the interior of the top fixed plate 335. 4 moves upward, causing the mounting plate 337 to move. The movement of the mounting plate 337 causes the adjusting roller 333 to move, thereby adjusting the distance between the fixed roller 332 and the adjusting roller 333. The motor 331 is started to drive the adjusting roller 333 to rotate, which in turn drives the fixed roller 332 to rotate through the felt. The two convey and compress the felt, which can eliminate the slight unevenness on the coating surface, making the coating surface smooth and flat, improving the appearance quality of the waterproof felt, enhancing the adhesion between the coating and the felt substrate, and improving the waterproof performance. Finally, the winding device 113 collects the felt.

[0055] A specific application of this embodiment is as follows: In use, the waterproof felt is first passed through the bottom of guide roller 1 216 and the top of guide roller 2 323, and then conveyed by unwinding device 112 and winding device 113. During the conveying process, the waterproof coating inside storage tank 211 is first stirred by stirring device 212 to prevent the coating from settling or clumping inside storage tank 211. Then, water pump 214 is started to convey the coating inside storage tank 211 into diversion water pump 213 through conveying pipe 215. Then, diversion water pump 213 conveys the coating through several nozzles 2 18. A large amount of paint is sprayed onto the surface of the felt. During the felt conveying process, a scraper 217 smooths the paint on the surface. The scraper 217 is adjustable. By smoothing the paint on the felt surface with the scraper 217, the thickness of the initial coating layer is controlled. Then, according to the coating requirements, the electric push rod 313 is activated to drive the telescopic rod 316. During the movement of the telescopic rod 316, it slides inside the support frame 311. Simultaneously, the movement of the telescopic rod 316 drives the moving frame 321 to move together via the connecting bracket 314. Both the front and rear ends of the moving frame 321... The moving frame 321 slides within the opening 315. The connecting bracket 314 and the opening 315 provide certain limits on the movement trajectory of the moving frame 321. Simultaneously, the operator can clearly understand the adjustment position of the moving frame 321 according to the scale lines 312. During the movement of the moving frame 321, the brush plate 322 moves along with it. The operator adjusts the distance between the brush plate 322 and the felt according to the coating requirements. Then, the motor 324 is started, driving the eccentric wheel 325 to rotate. During the rotation of the eccentric wheel 325, the connecting plate 327 reciprocates back and forth through the limiting groove 326. During the movement of the connecting plate 327, it slides inside the moving frame 321. The movement of the connecting plate 327 also drives the brush plate 322 to move together. During the movement of the brush plate 322, the coating on the surface of the felt is finely trimmed, making the coating thickness more uniform. Through the high-flow liquid supply structure of the coarse coating mechanism 2 and the scraper 217, a continuous covering layer is initially formed. Then, the brush plate 322 in the fine coating mechanism 3 trims the felt, which can improve the uniformity of the coating thickness on the surface of the waterproof felt, avoid the difference in waterproof performance caused by uneven coating thickness, and improve the overall quality of the product.

[0056] Simultaneously, the staff needs to adjust the distance between the fixed roller 332 and the adjusting roller 333 according to the thickness of the felt. Specifically, this is done by rotating the threaded rod 334 clockwise. Since the outer surface of the threaded rod 334 is threadedly connected to the inside of the top fixed plate 335, when the threaded rod 334 is rotated clockwise, it will move upwards. During this upward movement, the mounting plate 337 will also move. Furthermore, during the movement of the mounting plate 337, its left and right sides will slide on the outer surface of the limiting rods 336. The two limiting rods 336 provide a certain degree of stability for the movement trajectory of the mounting plate 337. During the process, the adjusting roller 333 will move to adjust the distance between the fixed roller 332 and the adjusting roller 333. Then, the motor 331 will be started to drive the adjusting roller 333 to rotate. During the rotation of the adjusting roller 333, the fixed roller 332 will be driven to rotate together through the felt. While the fixed roller 332 and the flattening component 33 are rotating to transport the felt, the felt will be squeezed, which can effectively eliminate the slight unevenness of the coating surface, making the coating surface smoother. This not only improves the appearance quality of the waterproof felt, but also helps to enhance the adhesion between the coating and the felt substrate, further improving the waterproof performance. Finally, the felt is stored by the winding device 113.

[0057] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A coating apparatus for preparing waterproof felt, comprising a worktable (111), characterized in that, Also includes: A rough coating mechanism (2) is installed on the top of the workbench (111) and is used to perform preliminary spray coating on the felt; as well as Fine coating mechanism (3) is installed on the right side of coarse coating mechanism (2) and is used to further trim the felt; The workbench (111) has an unwinding device (112) installed on the left side of its top and a winding device (113) installed on the right side of its top.

2. The coating apparatus for preparing waterproof felt according to claim 1, characterized in that, The rough coating mechanism (2) includes a spray assembly (21), which is located on the right side of the unwinding device (112) and connected to the top of the workbench (111). The spray assembly (21) adopts a high-flow liquid supply structure and a preliminary spraying method, which can quickly form a continuous covering layer on the felt surface. The spray assembly (21) includes a storage tank (211), and a stirring device (212) is installed inside the storage tank (211).

3. The coating apparatus for preparing waterproof felt according to claim 2, characterized in that, The fine coating mechanism (3) includes an adjustment component (31), which is located on the right side of the spray assembly (21) and connected to the top of the workbench (111). The adjustment component (31) is used to adjust the distance between the fine finishing brush and the felt. A trimming component (32) is connected to the bottom output end of the adjustment component (31). The trimming component (32) is used to fine-tune the coating on the felt surface. as well as A flattening component (33) is disposed on the right side of the trimming component (32) and connected to the adjusting component (31). The flattening component (33) is used to flatten the trimmed felt. The adjustment component (31) includes a support frame (311), which is n-shaped.

4. The coating apparatus for preparing waterproof felt according to claim 3, characterized in that, The workbench (111) has support frames (219) welded to its front and back sides. The two support frames (219) are connected to the storage box (211) on their respective sides. The storage box (211) is equipped with a diversion water pump (213) at its bottom. The diversion water pump (213) is connected to the support frames (219) on its front and back sides. The diversion water pump (213) has several nozzles (218) installed at its bottom outlet. The storage box (211) is equipped with a water pump (214) on its right side. The water pump (214) has its inlet connected to the outlet of the storage box (211) through a conveying pipe (215). The water pump (214) has its outlet connected to the inlet of the diversion water pump (213) through a conveying pipe (215). Among them, the two support frames (219) are internally connected to a guide roller (216), and a scraper (217) is provided on the right side of the guide roller (216). The front and back sides of the scraper (217) are connected to the right side of the support frame (219).

5. A coating apparatus for preparing waterproof felt according to claim 3, characterized in that, The bottom of the support frame (311) is welded to the top of the workbench (111). An electric push rod (313) is installed on the top of the support frame (311). A scale line (312) is provided on the front of the support frame (311). A telescopic rod (316) is connected to the bottom output end of the electric push rod (313). A connecting bracket (314) is connected to the side of the telescopic rod (316) away from the electric push rod (313). The connecting bracket (314) is slidably connected to the support frame (311), and the support frame (311) has openings (315) on both the front and back sides.

6. A coating apparatus for preparing waterproof felt according to claim 3, characterized in that, The trimming assembly (32) includes a movable frame (321), the top of which is welded to the side of the connecting bracket (314) away from the electric push rod (313). A motor (324) is installed on the top of the movable frame (321). A connecting plate (327) is provided inside the movable frame (321). A slot is opened at the bottom of the movable frame (321). An eccentric wheel (325) is provided on the top of the connecting plate (327). The bottom output end of the motor (324) is connected to the top of the eccentric wheel (325) through a coupling. A limiting groove (326) is opened on the top of the connecting plate (327). The bottom of the eccentric wheel (325) is connected to the connecting plate (327) through the limiting groove (326). The movable frame (321) is provided with a brush plate (322) at the bottom, the connecting plate (327) passes through the slot and extends to the bottom, the bottom of the connecting plate (327) is welded to the top of the brush plate (322), and the bottom of the brush plate (322) is provided with two guide rollers (323), which are connected to the support frame (311).

7. A coating apparatus for preparing waterproof felt according to claim 3, characterized in that, The flattening assembly (33) includes a fixed roller (332), which is connected to a support frame (311). An adjusting roller (333) is provided above the fixed roller (332). The front and back sides of the right side of the support frame (311) are provided with sliding grooves. The front and back sides of the adjusting roller (333) penetrate the support frame (311) and extend into the sliding grooves. A second motor (331) is provided on the front side of the support frame (311). A mounting plate (337) is connected to the back side of the second motor (331). The inside of the mounting plate (337) is connected to the front shaft of the adjusting roller (333). The output end of the back side of the second motor (331) is connected to the front side of the adjusting roller (333) through a coupling. The support frame (311) has two fixed plates (335) welded to its front side. Limiting rods (336) are connected to the left and right sides of the two fixed plates (335). The outer surfaces of the two limiting rods (336) are slidably connected to the left and right sides of the mounting plate (337). A threaded rod (334) is threadedly connected to the inside of the fixed plate (335) at the top. The bottom of the threaded rod (334) is rotatably connected to the inside of the mounting plate (337).

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