Soft egg filtering device for poultry breeding

CN224819147UActive Publication Date: 2026-10-09HENAN HONGFA BREEDING EQUIP CO LTD
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Patent Information

Application Number
CN202522240436.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-23
Publication Date
2026-10-09
Estimated Expiration
2035-10-23

AI Technical Summary

Technical Problem

这种方式不仅耗费大量人力和时间,效率极为低下,而且在长时间高强度的工作下,操作人员极易产生疲劳,导致筛选标准难以保持统一,出现漏检、误检等情况,严重影响筛选质量

Benefits of technology

[0024](1)、该家禽养殖用软蛋过滤装置,能够对鸡蛋进行自动化输送和软蛋筛选,相比人工筛选可能因疲劳、疏忽等因素导致筛选标准不一致,该装置能够始终按照既定的筛选条件进行操作,减少了筛选误差,提高了筛选的准确性和稳定性。

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a soft egg filter device for poultry breeding relates to conveying, packing, storage, handling thin or filamentous material technical field, the soft egg filter device for poultry breeding, including first connecting plate, the rear side of first connecting plate is installed with second connecting plate, and the fixed mounting of first connecting plate and second connecting plate has the placement block, and the upside fixed connection of placement block has two guide plates, and the front side of first connecting plate is installed with rotating shaft, and the rear side rotation of rotating shaft is passed through second connecting plate, and the outer surface of rotating shaft is fixed with rubber -tired sleeve, and the conveying screening mechanism is set up between first connecting plate and second connecting plate, can carry out the automation conveying and soft egg screening to egg, compared with the screening standard of artificial screening possibly because of fatigue, negligence etc.
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Description

Technical Field

[0001] This utility model relates to the technical field of conveying, packaging, storing, and handling thin or filamentous materials, specifically a soft-shell egg filtration device for poultry farming. Background Technology

[0002] In the poultry farming industry, eggs are an important product, and their quality control directly affects farming efficiency and market competitiveness. Among them, soft-shelled eggs are those with thin shells and soft textures, which are caused by physiological abnormalities in poultry or unbalanced feed nutrition. Screening for soft-shelled eggs is a key step in ensuring egg quality.

[0003] Traditional manual screening relies on operators to inspect each egg individually, judging whether it is a soft-boiled egg by visual inspection and touch. This method is not only labor-intensive and time-consuming, but also extremely inefficient. Furthermore, the long hours and high intensity of work can easily lead to operator fatigue, making it difficult to maintain consistent screening standards and resulting in missed or false detections, severely impacting screening quality. With the continuous expansion of poultry farming and the increasing egg production, traditional manual screening methods can no longer meet the demands for large-scale, efficient, and high-quality screening. Therefore, developing an automated, efficient, and accurate device for screening soft-boiled eggs has become an urgent need for the poultry farming industry. Utility Model Content

[0004] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a soft-shell egg filtration device for poultry farming, which has the functions of automated egg conveying and soft-shell egg screening. Compared with manual screening, which may result in inconsistent screening standards due to factors such as fatigue and negligence, this device can always operate according to the predetermined screening conditions, reducing screening errors and improving the accuracy and stability of screening.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a soft-shell egg filtering device for poultry farming, comprising a first connecting plate, a second connecting plate installed on the rear side of the first connecting plate, and the first connecting plate and the second connecting plate being fixedly connected together by a plurality of fixing rods;

[0006] A placement block is fixedly installed between the first connecting plate and the second connecting plate. Two guide plates are fixedly connected to the upper side of the placement block. The two guide plates are arranged in a front-to-back manner, and the space between the two guide plates is where the egg is placed.

[0007] A rotating shaft is installed on the front side of the first connecting plate, and the rear side of the rotating shaft rotates through the second connecting plate. A rubber wheel is fixedly sleeved on the outer surface of the rotating shaft. The rubber wheel is located on the right side of the placement block, between the two guide plates. The rubber wheel can transport the eggs on the placement block to the right. A conveying and screening mechanism is provided between the first and second connecting plates. The conveying and screening mechanism can transport the eggs on the placement block and screen soft eggs during the conveying process.

[0008] The conveying and screening mechanism includes two drive shafts, four first sprockets, several screening shafts, two rotating wheels, six conveying rods, a second sprocket, a third sprocket, a fixed frame, a motor assembly, and a collection box.

[0009] Preferably, bearings are fixedly connected to the sides of the first connecting plate and the second connecting plate that are far apart from each other, the outer rings of the two bearings are fixedly connected to the first connecting plate and the second connecting plate respectively, and the inner rings of the two bearings are connected to the rotating shaft.

[0010] Preferably, both drive shafts are mounted on the front side of the first connecting plate, and the rear ends of both drive shafts rotatably pass through the second connecting plate;

[0011] The two drive shafts are arranged side by side, and bearings are also installed on both drive shafts, with two bearings installed on each drive shaft.

[0012] Preferably, the outer rings of the two bearings are fixedly connected to the opposite surfaces of the first connecting plate and the second connecting plate, respectively, and the inner rings of the two bearings are connected to the drive shaft;

[0013] Four first sprockets are fixedly fitted onto the outer surfaces of two drive shafts, and two first sprockets are installed on each drive shaft.

[0014] Preferably, the two first sprockets are arranged symmetrically front to back, and a first chain is connected between the two first sprockets on the front side of the two drive shafts;

[0015] The two first sprockets on the rear side of the two drive shafts are also connected by a first chain. Several screening shafts are fixedly connected between the two first chains. The eggs are transported and screened through the screening shafts. Two rotating wheels are fixedly sleeved on the outer surface of the right drive shaft.

[0016] Preferably, the two rotating wheels are positioned between the two first sprockets, and the six conveying rods are respectively fixedly connected between the two rotating wheels;

[0017] The second sprocket is fixedly connected to the right drive shaft. The second sprocket is located at the rear side of the second connecting plate. The third sprocket is fixedly sleeved on the rear side of the rotating shaft.

[0018] A second chain is connected between the second sprocket and the third sprocket, and a fixed frame is fixedly connected to the front side of the first connecting plate.

[0019] Preferably, the motor assembly is fixedly connected to the front side of the fixed frame, the output shaft of the motor assembly rotates through the fixed frame, and the rear end of the output shaft of the motor assembly is fixedly connected to the right transmission shaft;

[0020] The collection box is slidably connected to two fixed rods on the lower side. The collection box is located below several screening shafts and can collect the soft eggs that have been screened out.

[0021] Preferably, a receiving block is installed on the right side of the first connecting plate and the second connecting plate, and a buffer pad is pasted on the bottom wall of the receiving block. The buffer pad is made of silicone material, and the upper side of the buffer pad is inclined with the left side higher than the right side.

[0022] The receiving block has mounting slots on both the front and rear sides, and bolts are installed on the left wall of both mounting slots. The receiving block is connected to the first connecting plate and the second connecting plate by bolts.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] (1) The soft-shell egg filtration device for poultry farming can automatically transport and screen eggs. Compared with manual screening, which may result in inconsistent screening standards due to factors such as fatigue or negligence, this device can always operate according to the established screening conditions, reducing screening errors and improving the accuracy and stability of screening.

[0025] (2) The soft-shell egg filtering device for poultry farming has a collection box that is slidably connected to two fixed rods on the lower side and is located on the lower side of the screening shaft. It can easily collect the soft-shell eggs that have been screened. When the collection box is full of soft-shell eggs, the operator can easily pull it out for cleaning and replacement, which further simplifies the operation process and improves work efficiency.

[0026] (3) The soft egg filter device for poultry farming has a buffer pad that can effectively buffer the impact force of normal eggs falling from the screening shaft and prevent the eggshells from being damaged by impact. Its tilted design with the left side higher than the right side can also guide the eggs to slide down automatically and in an orderly manner. The combination of bolts and mounting slots makes the receiving block installed firmly and easy to disassemble and maintain, which improves the integrity rate of normal eggs, reduces egg loss, and improves the efficiency of subsequent collection without the need for manual sorting. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] Figure 1 This is a schematic diagram of the structure of a soft-shell egg filtration device for poultry farming according to the present invention;

[0029] Figure 2 This is a schematic diagram of the connection structure at the rear of the soft-boiled egg filter device of this utility model;

[0030] Figure 3 This is a schematic diagram of the connection structure at the motor assembly of this utility model;

[0031] Figure 4 This is a schematic diagram of the connection structure at the collection box of this utility model;

[0032] Figure 5 This is a schematic diagram of the connection structure at the receiving block of this utility model.

[0033] Reference numerals: 1. First connecting plate; 2. Second connecting plate; 3. Fixing rod; 4. Placement block; 5. Guide plate; 6. Bearing; 7. Rotating shaft; 8. Rubber wheel; 9. Drive shaft; 10. First sprocket; 11. First chain; 12. Screening shaft; 13. Rotating wheel; 14. Conveying rod; 15. Second sprocket; 16. Third sprocket; 17. Second chain; 18. Fixing frame; 19. Motor assembly; 20. Collection box; 21. Receiving block; 22. Buffer pad; 23. Mounting groove. Detailed Implementation

[0034] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Please see Figure 1-5 This utility model provides a new technical solution: a soft-shell egg filtration device for poultry farming, including a first connecting plate 1: serving as the main support structure on the front side of the device, providing an installation base for other components, and cooperating with the second connecting plate 2 to form the overall frame of the device.

[0039] The second connecting plate 2 is located at the rear of the device and is fixedly connected to the first connecting plate 1 by several fixing rods 3. Together they form the frame of the device and provide installation positions for components such as the rotating shaft 7 and the transmission shaft 9.

[0040] Fixing rod 3: The first connecting plate 1 and the second connecting plate 2 are fixedly connected together by bolts, which serves to stabilize the frame of the device. At the same time, there are two fixing rods 3 on the lower side to provide a sliding connection position for the collection box 20.

[0041] Placement block 4: It is fixedly installed between the first connecting plate 1 and the second connecting plate 2, and its upper side is the egg placement area, which is used to hold the eggs to be screened.

[0042] Guide plate 5: There are two guide plates 5, which are arranged in a front-to-back manner and fixedly connected to the upper side of the placement block 4. The egg placement area is formed between the two guide plates 5, which guides and limits the eggs placed on the placement block 4, so that the eggs can move in a predetermined direction.

[0043] Bearing 6: There are multiple bearings 6. Two are fixedly connected to each side of the first connecting plate 1 and the second connecting plate 2 that are far apart from each other. They are respectively connected to the rotating shaft 7 and the transmission shaft 9 (two bearings 6 are installed on the rotating shaft 7 and each transmission shaft 9. The outer rings of the two bearings 6 are fixedly connected to the first connecting plate 1 and the second connecting plate 2 respectively, and the inner rings are connected to the corresponding shafts). Their function is to reduce the friction when the shaft rotates and ensure that the rotating shaft 7 and the transmission shaft 9 can rotate smoothly and steadily.

[0044] Rotating shaft 7: The front side is mounted on the first connecting plate 1, and the rear side rotates through the second connecting plate 2. Stable rotation is achieved through bearing 6. A rubber wheel 8 is fixedly sleeved on its outer surface, which is the key component that drives the rubber wheel 8 to rotate.

[0045] Rubber wheel 8: It is fixedly sleeved on the outer surface of the rotating shaft 7 and is located on the right side of the placement block 4, between the two guide plates 5. It rotates with the rotation of the rotating shaft 7 and can transport the eggs on the placement block 4, which have been guided by the guide plates 5, to the right.

[0046] Drive shaft 9: There are two drive shafts 9, both installed on the front side of the first connecting plate 1 and with their rear ends rotatably passing through the second connecting plate 2, arranged left and right, and achieving stable rotation through bearings 6. The right drive shaft 9 is the key shaft for power transmission, driving the rotation of multiple related components; the left drive shaft 9 rotates synchronously with the right drive shaft 9 under the action of the first sprocket 10 and the first chain 11.

[0047] First sprockets 10: There are four first sprockets 10, which are fixedly sleeved on the outer surfaces of the two drive shafts 9. Two sprockets are installed on each drive shaft 9 and are arranged symmetrically front and back. First chains 11 are connected between the two first sprockets 10 on the front side and between the two first sprockets 10 on the rear side of the two drive shafts 9, which play the role of transmitting power and enabling the two drive shafts 9 to rotate synchronously.

[0048] First chain 11: There are two first chains 11, which are respectively connected between the two first sprockets 10 on the front side and the two first sprockets 10 on the rear side of the two drive shafts 9. Through cooperation with the first sprockets 10, power is transmitted and the screening shaft 12 is moved.

[0049] Screening shaft 12: Several screening shafts 12 are fixedly connected between two first chains 11. They move with the transmission of the first chains 11 to transport the eggs conveyed by the rubber wheels 8. At the same time, during the transport process, the difference in physical characteristics between soft eggs and normal eggs is used to make soft eggs fall through the gap between the screening shafts 12, thereby realizing the screening of soft eggs.

[0050] Rotating wheel 13: There are two rotating wheels 13, which are fixedly sleeved on the outer surface of the right drive shaft 9 and set between the two first sprockets 10. They rotate with the rotation of the right drive shaft 9 and provide a mounting base for the conveyor rod 14.

[0051] Conveying rods 14: There are six conveying rods 14, which are fixedly connected between two rotating wheels 13. They rotate with the rotating wheels 13 to assist in the conveying process of eggs.

[0052] The second sprocket 15 is fixedly connected to the right drive shaft 9 and is located at the rear side of the second connecting plate 2. It is connected to the third sprocket 16 via the second chain 17 to transmit the power of the right drive shaft 9 to the rotating shaft 7.

[0053] The third sprocket 16 is fixedly sleeved on the rear side of the rotating shaft 7, and is connected to the second sprocket 15 through the second chain 17. It receives the power transmitted by the second sprocket 15 and drives the rotating shaft 7 to rotate.

[0054] Second chain 17: It is connected between the second sprocket 15 and the third sprocket 16 to realize the transmission of power, so that the rotation of the right drive shaft 9 can drive the rotating shaft 7 to rotate.

[0055] Fixed frame 18: Fixedly connected to the front side of the first connecting plate 1, providing an installation position for the motor assembly 19, and playing the role of fixing and supporting the motor assembly 19.

[0056] Motor assembly 19: It is fixedly connected to the front side of the fixed frame 18. Its output shaft rotates through the fixed frame 18 and is fixedly connected to the right transmission shaft 9. It is the power source of the whole device. The rotation of the output shaft drives the right transmission shaft 9 to rotate, thereby driving the whole device to run.

[0057] Collection box 20: It is slidably connected to the two fixed rods 3 on the lower side and is set on the lower side of several screening shafts 12. It is used to catch soft eggs falling from between the screening shafts 12 and realize the collection of soft eggs.

[0058] Receiving block 21: Installed on the right side of the first connecting plate 1 and the second connecting plate 2, with mounting grooves 23 on both the front and rear sides. Bolts are installed on the left walls of both mounting grooves 23, which are connected to the first connecting plate 1 and the second connecting plate 2 by means of bolts. It is used to receive normal eggs conveyed by the screening shaft 12 and to provide a transition receiving platform for normal eggs.

[0059] Buffer pad 22: It is pasted on the bottom wall of the receiving block 21. The upper side is inclined from left to right. It can buffer the impact of the egg falling normally, prevent the egg from breaking, and guide the egg to slide to the right for easy collection later.

[0060] Mounting slot 23: It is formed on the front and rear sides of the receiving block 21, and bolts are installed on the left wall. It provides installation space for the connection between the receiving block 21 and the first connecting plate 1 and the second connecting plate 2, so that the receiving block 21 is installed firmly and is easy to disassemble and maintain.

[0061] Furthermore, when starting work, the motor assembly 19 fixed to the front of the fixed frame 18 is activated. After the output shaft of the motor assembly 19 rotates through the fixed frame 18, its rear end is fixedly connected to the right drive shaft 9, thereby driving the right drive shaft 9 to rotate. The right drive shaft 9 rotates, and because it has two rotating wheels 13 fixedly sleeved on it, it will drive the two rotating wheels 13 to rotate, thereby causing the six conveying rods 14 fixedly connected between the two rotating wheels 13 to rotate. The right drive shaft 9 will drive the rotating shaft 7 to rotate through the second chain 17. The rotating shaft 7 achieves stable rotation through the bearings 6 installed on its front and rear sides. The rotation of the rotating shaft 7 drives the rubber wheel 8 fixedly sleeved on its outer surface to rotate. The rubber wheel 8 is located on the right side of the placement block 4, between the two guide plates 5, which can transport the eggs on the placement block 4 to the right, and then the eggs will be transported to the screening shaft 12 for conveying.

[0062] Two first sprockets 10 are fixedly sleeved on the right drive shaft 9, and two first sprockets 10 are also fixedly sleeved on the left drive shaft 9. A first chain 11 is connected between the two first sprockets 10 on the front side of the two drive shafts 9, and similarly, a first chain 11 is connected between the two first sprockets 10 on the rear side of the two drive shafts 9. Therefore, rotation of the right drive shaft 9 will drive the left drive shaft 9 to rotate through the first sprockets 10 and the first chain 11. Both drive shafts 9 achieve stable rotation through bearings 6 installed on them. Several screening shafts 12 are respectively fixed... The screening shaft 12 is fixedly connected between two first chains 11. As the first chains 11 are driven, the screening shaft 12 will transport the eggs that are conveyed to the right by the rubber wheel 8 on the placement block 4. During the transportation process, due to the difference in physical characteristics between soft eggs and normal eggs, soft eggs will fall through the gap between the screening shafts 12, while normal eggs will be transported to the right. The collection box 20 is slidably connected to two fixed rods 3 on the lower side and is set on the lower side of several screening shafts 12. Soft eggs that fall from between the screening shafts 12 will fall into the collection box 20, realizing the collection of soft eggs.

[0063] Normal eggs, after being screened by the screening shaft 12, continue to be conveyed to the right along the screening shaft 12, and are finally conveyed to the receiving block 21 installed on the right side of the first connecting plate 1 and the second connecting plate 2. The receiving block 21 is fixedly connected to the first connecting plate 1 and the second connecting plate 2 by bolts on the left wall of the front and rear mounting grooves 23, and is installed securely; the buffer pad 22 attached to its bottom wall is inclined on the left and lower on the right, which can not only cushion the falling normal eggs and prevent them from being damaged by impact, but also guide the normal eggs to slide to the right along the surface of the buffer pad 22 with the help of the inclined structure, which facilitates the subsequent centralized collection and processing of normal eggs.

[0064] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A soft-shell egg filtering device for poultry farming, comprising a first connecting plate (1), a second connecting plate (2) installed on the rear side of the first connecting plate (1), and the first connecting plate (1) and the second connecting plate (2) being fixedly connected together by a plurality of fixing rods (3); A placement block (4) is fixedly installed between the first connecting plate (1) and the second connecting plate (2). Two guide plates (5) are fixedly connected to the upper side of the placement block (4), and the two guide plates (5) are arranged in a front-to-back manner. A rotating shaft (7) is mounted on the front side of the first connecting plate (1), and the rear side of the rotating shaft (7) rotates through the second connecting plate (2). A rubber wheel (8) is fixedly sleeved on the outer surface of the rotating shaft (7). The rubber wheel (8) is located on the right side of the placement block (4) between the two guide plates (5). The feature is that: A conveying and screening mechanism is provided between the first connecting plate (1) and the second connecting plate (2). The conveying and screening mechanism can convey the eggs on the placement block (4) and screen the soft eggs during the conveying process. The conveying and screening mechanism includes two drive shafts (9), four first sprockets (10), several screening shafts (12), two rotating wheels (13), six conveying rods (14), a second sprocket (15), a third sprocket (16), a fixed frame (18), a motor assembly (19), and a collection box (20).

2. The soft-shell egg filtration device for poultry farming according to claim 1, characterized in that: Bearings (6) are fixedly connected to the side of the first connecting plate (1) and the second connecting plate (2) that are far apart from each other. The outer rings of the two bearings (6) are fixedly connected to the first connecting plate (1) and the second connecting plate (2) respectively, and the inner rings of the two bearings (6) are connected to the rotating shaft (7).

3. The soft-shell egg filtration device for poultry farming according to claim 1, characterized in that: Both drive shafts (9) are mounted on the front side of the first connecting plate (1), and the rear ends of both drive shafts (9) rotate through the second connecting plate (2). Two drive shafts (9) are arranged on the left and right, and bearings (6) are also installed on both drive shafts (9). Each drive shaft (9) has two bearings (6).

4. A soft-shell egg filtration device for poultry farming according to claim 3, characterized in that: The outer rings of the two bearings (6) are fixedly connected to the opposite surfaces of the first connecting plate (1) and the second connecting plate (2), respectively, and the inner rings of the two bearings (6) are connected to the transmission shaft (9); Four first sprockets (10) are fixedly sleeved on the outer surfaces of two drive shafts (9), and two first sprockets (10) are installed on each drive shaft (9).

5. A soft-shell egg filtration device for poultry farming according to claim 4, characterized in that: The two first sprockets (10) are arranged symmetrically in front and behind, and the two first sprockets (10) on the front side of the two drive shafts (9) are connected by a first chain (11). The two first sprockets (10) on the rear side of the two drive shafts (9) are also connected by a first chain (11), and several screening shafts (12) are fixedly connected between the two first chains (11). Two rotating wheels (13) are fixedly sleeved on the outer surface of the right drive shaft (9).

6. A soft-shell egg filtration device for poultry farming according to claim 5, characterized in that: The two rotating wheels (13) are positioned between the two first sprockets (10), and the six conveying rods (14) are fixedly connected between the two rotating wheels (13); The second sprocket (15) is fixedly connected to the right drive shaft (9). The second sprocket (15) is located at the rear side of the second connecting plate (2). The third sprocket (16) is fixedly sleeved on the rear side of the rotating shaft (7). A second chain (17) is connected between the second sprocket (15) and the third sprocket (16), and a fixed frame (18) is fixedly connected to the front side of the first connecting plate (1).

7. A soft-shell egg filtration device for poultry farming according to claim 1, characterized in that: The motor assembly (19) is fixedly connected to the front side of the fixed frame (18). The output shaft of the motor assembly (19) rotates through the fixed frame (18). The rear end of the output shaft of the motor assembly (19) is fixedly connected to the right transmission shaft (9). The collection box (20) is slidably connected to two fixed rods (3) on the lower side, and the collection box (20) is set on the lower side of several screening shafts (12).

8. A soft-shell egg filtration device for poultry farming according to claim 1, characterized in that: A receiving block (21) is installed on the right side of the first connecting plate (1) and the second connecting plate (2). A buffer pad (22) is pasted on the bottom wall of the receiving block (21). The upper side of the buffer pad (22) is inclined with the left side higher than the right side. The front and rear sides of the receiving block (21) are provided with mounting slots (23), and bolts are installed on the left wall of the two mounting slots (23). The receiving block (21) is connected to the first connecting plate (1) and the second connecting plate (2) by bolts.