A suspension oven nozzle that is easy to install and an installation method thereof

Abstract

The present invention discloses a suspension oven nozzle which is easy to install and an installation method thereof, comprising a box body, wherein the upper and lower ends of the interior of the box body are respectively fixedly connected with an upper air duct and a lower air duct, the upper air duct and the lower air duct are arranged opposite to each other, a plurality of upper nozzles are installed at the middle part of the bottom end of the upper air duct through a first guide mechanism, a lower nozzle is installed at the middle part of the top end of the lower air duct through a second guide mechanism, and the middle parts of both sides of the front and rear ends of the upper nozzle are respectively fixedly connected with a second installation rod and a first installation rod; in the present invention, the upper nozzle and the lower nozzle can be guided by the first guide mechanism and the second guide mechanism, and such an installation operation mode no longer completely relies on human lifting, but relies on its own installation track to make the installation more convenient, labor-saving and efficient.

Description

Technical Field

[0001] The invention belongs to the technical field of coating and drying, and in particular relates to a suspension oven nozzle which is easy to install and an installation method thereof. Background Art

[0002] With the rapid development of materials such as lithium batteries, optics, photovoltaics, shielding and flexible circuit board substrates, coating has become an indispensable processing method for composite materials; and batch production, scale and efficiency improvement have become the core of cost control for major coating companies; suspension ovens are the must-have equipment for drying high-end products in the coating field. They have unique advantages in drying efficiency, ensuring product appearance and characteristics, and many other quality aspects and are widely used; as supporting equipment for high-end products, regular maintenance and 5S management are particularly necessary, so how to improve maintenance efficiency and 5S management efficiency, maximize equipment utilization and ensure the accuracy of equipment assembly is necessary and essential.

[0003] In the traditional suspension oven maintenance and 5S management, the maintenance of the nozzle is mainly carried out by manual lifting and disassembly. However, with the needs of scale and cost control, the size of the nozzle has developed from the initial width of 200-300mm to 2000-5000mm. Manpower can no longer complete the disassembly and assembly of the nozzle in the traditional way, which brings many inconveniences to the maintenance and 5S management of the entire equipment and greatly reduces the efficiency of equipment use. At the same time, the accuracy of recovery after manual operation cannot be guaranteed, resulting in the inability to reset the equipment, affecting the operation of the equipment, and thus causing fluctuations in the appearance and performance of the product. How to solve the maintenance needs of wide nozzles, improve maintenance efficiency, accurately restore the original appearance of the equipment, and increase the effective working time of the equipment have become urgent problems to be solved in the daily use of suspension ovens. Therefore, a suspension oven nozzle that is easy to install is designed to change the above technical defects. Summary of the invention

[0004] (1) Technical issues to be solved

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a suspension oven nozzle that is easy to install and an installation method thereof to solve the above-mentioned technical problems.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a suspended oven nozzle that is easy to install, including a box body, the upper and lower ends of the interior of the box body are respectively fixedly connected with an upper air duct and a lower air duct, the upper air duct and the lower air duct are arranged opposite to each other, a plurality of upper nozzles are installed in the middle of the bottom end of the upper air duct through a first guide mechanism, a lower nozzle is installed in the middle of the top end of the lower air duct through a second guide mechanism, the middle of both sides of the front and rear ends of the upper nozzle are respectively fixedly connected with a second mounting rod and a first mounting rod, each first guide mechanism includes two upper U-shaped plates arranged in parallel, the upper nozzle is slidably connected between the two upper U-shaped plates through the first mounting rod and the second mounting rod, the middle of both sides of the front and rear ends of the lower nozzle are respectively fixedly connected with a fourth mounting rod and a third mounting rod, each second guide mechanism includes two lower U-shaped plates arranged in parallel, the lower nozzle is slidably connected between the two lower U-shaped plates through the third mounting rod and the fourth mounting rod.

[0008] Preferably, a fresh air inlet is fixedly connected to the rear side of the upper surface of the left end of the box body, an exhaust outlet is fixedly connected to the upper surface of the right end of the box body and at a position corresponding to the fresh air inlet, a plurality of box doors distributed at equal intervals are hingedly connected to the front of the box body, an observation window is fixedly installed in the middle of the box door, a circulating fan connected to the fresh air inlet is fixedly installed on the back of the left end of the box body, the air outlet end of the circulating fan is fixedly connected to the upper air duct and the lower air duct through pipes, a pressure gauge is fixedly installed on the top of the front end of the box body, and handles are fixedly connected to the front ends of the upper nozzle and the lower nozzle.

[0009] Preferably, the open ends of the two upper U-shaped plates are arranged opposite to each other, the top ends of the two upper U-shaped plates are fixedly connected to the upper air duct, the bottom edges of the two upper U-shaped plates are inclined to form a sloped track, the front end of the sloped track is lower than the rear end thereof, and the first mounting rod is slidably connected to the sloped track.

[0010] More preferably, the front ends of the two upper U-shaped plates are provided with an upper groove adapted to the second mounting rod, the second mounting rod is slidably connected to the inside of the upper groove, the end of the second mounting rod away from the upper nozzle passes through the upper groove and extends to the outside, and the inner bottom wall of the upper groove is flush with the rear end plane inner wall of the inclined track.

[0011] More preferably, the opening ends of the two lower U-shaped plates are arranged back to back, the bottom ends of the two lower U-shaped plates are fixedly connected to the lower air duct, the top of the rear end of the lower U-shaped plate is provided with an oblique opening, the top ends of the two lower U-shaped plates and the sides away from each other are integrally formed with guide plates, a guide groove is formed between the guide plate and the top end of the lower U-shaped plate, and a positioning oblique groove is formed between the guide plate and the oblique opening.

[0012] More preferably, the third mounting rod is slidably connected in the guide groove and the positioning inclined groove, the front end of the lower U-shaped plate is provided with a lower groove, and the fourth mounting rod is slidably connected in the lower groove.

[0013] More preferably, the upper surface of the upper nozzle contacts the lower surface of the upper air duct, a first air inlet is provided at the middle of the top end of the upper nozzle and the middle of the bottom end of the upper air duct, and a sealing ring is installed at the first air inlet.

[0014] More preferably, the lower surface of the lower nozzle contacts the upper surface of the lower air duct, a second air inlet is provided at the middle of the lower end of the lower nozzle and the middle of the top end of the lower air duct, and a sealing ring is installed at the second air inlet.

[0015] More preferably, a positioning inclined plate groove is fixedly connected to the top of the rear end plane of the inclined track, the positioning inclined plate groove is adapted to the first mounting rod, and the inner bottom wall of the positioning inclined plate groove is flush with the inner bottom wall of the upper groove.

[0016] The present invention also provides an installation method for a suspended oven nozzle. When installing the suspended oven nozzle, a first guide mechanism and a second guide mechanism are used to guide the upper nozzle and the lower nozzle, the first installation rod is placed into the outer side of the inclined track, and then the upper nozzle is pushed to move backward along the inclined track. When the second installation rod approaches the upper groove, the front end of the upper nozzle is pressed downward, and at the same time, the upper nozzle is pushed inward to make the second installation rod enter the upper groove, the third installation rod is placed into the outer side of the guide groove, and then the lower nozzle is pushed to move backward along the guide groove, when the fourth installation rod approaches the lower groove, the front end of the lower nozzle is lifted up, and at the same time, the lower nozzle is pushed backward to make the third installation rod enter the positioning inclined groove, and the fourth installation rod enters the lower groove and is clamped.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, the upper nozzle and the lower nozzle can be guided by the first guide mechanism and the second guide mechanism, the first mounting rod is placed into the outer side of the inclined track, and then the upper nozzle is pushed to move backward along the inclined track, when the second mounting rod approaches the upper groove, the front end of the upper nozzle is pressed downward, and at the same time, the upper nozzle is pushed inward to make the second mounting rod enter the upper groove, the third mounting rod is placed into the outer side of the guide groove, and then the lower nozzle is pushed to move backward along the guide groove, when the fourth mounting rod approaches the lower groove, the front end of the lower nozzle is lifted up, and at the same time, the lower nozzle is pushed backward to make the third mounting rod enter the positioning inclined groove, and the fourth mounting rod is entered into the lower groove and clamped, such an installation operation method no longer completely relies on manpower support, but relies on the mounting track itself to make the installation more convenient, labor-saving and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the installation structure of the upper and lower air ducts and the upper and lower nozzles in the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the upper air duct and the upper nozzle installation in the present invention;

[0023] Figure 4 It is a schematic diagram of the side view structure of the upper rail and the upper nozzle installation in the present invention;

[0024] Figure 5 It is a rear view structural schematic diagram of the upper rail and the upper nozzle installation in the present invention;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the installation of the lower track and the lower nozzle in the present invention;

[0026] Figure 7 It is a side view structural schematic diagram of the installation of the lower track and the lower nozzle in the present invention;

[0027] Figure 8 It is a rear view structural schematic diagram of the installation of the lower track and the lower nozzle in the present invention;

[0028] Fig. 9 It is a schematic diagram of the connection structure between the upper rail and the rear mounting rod in the present invention.

[0029] The markings in the accompanying drawings are: 1. box body; 2. fresh air inlet; 3. exhaust outlet; 4. box door; 5. observation window; 6. pressure gauge; 7. upper air duct; 8. lower air duct; 9. upper nozzle; 901. first mounting rod; 902. second mounting rod; 10. lower nozzle; 101. third mounting rod; 102. fourth mounting rod; 11. upper U-shaped plate; 12. upper groove; 13. inclined track; 131. positioning inclined plate groove; 14. handle; 15. lower U-shaped plate; 151. guide plate; 152. positioning inclined groove; 153. lower groove. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of those skilled in the art, the following embodiments and attached Figure 1-9 The present invention is further described, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0031] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element.

[0032] When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0035] In the description of the present application, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0036] Example 1

[0037] This specific embodiment is a suspension oven nozzle that is easy to install, and its structural schematic diagram is as follows Figure 1-Figure 8 As shown, it includes a box body 1, the upper and lower ends of the interior of the box body 1 are respectively fixedly connected with an upper air duct 7 and a lower air duct 8, the upper air duct 7 and the lower air duct 8 are arranged opposite to each other, a plurality of upper nozzles 9 are installed in the middle of the bottom end of the upper air duct 7 through a first guide mechanism, a lower nozzle 10 is installed in the middle of the top end of the lower air duct 8 through a second guide mechanism, the middle of both sides of the front and rear ends of the upper nozzle 9 are respectively fixedly connected with a second mounting rod 902 and a first mounting rod 901, each first guide mechanism includes two upper U-shaped plates 11 arranged in parallel, the upper nozzle 9 is slidably connected between the two upper U-shaped plates 11 through the first mounting rod 901 and the second mounting rod 902, and the middle of both sides of the front and rear ends of the lower nozzle 10 are respectively fixedly connected with a second mounting rod 902. Four mounting rods 102 and a third mounting rod 101, each second guide mechanism includes two lower U-shaped plates 15 arranged in parallel, and the lower nozzle 10 is slidably connected between the two lower U-shaped plates 15 through the third mounting rod 101 and the fourth mounting rod 102; when installing and disassembling the upper nozzle 9, the upper nozzle 9 and the lower nozzle 10 are pulled to make the upper nozzle 9 slide in the first guide mechanism and the lower nozzle 10 slide in the second guide mechanism; specifically, the upper nozzle 9 slides between the two upper U-shaped plates 11 through the two first mounting rods 901, and the lower nozzle 10 slides between the two lower U-shaped plates 15 through the two third mounting rods 101, thereby facilitating the installation and disassembly of the upper nozzle 9 and the lower nozzle 10.

[0038] Among them, a fresh air inlet 2 is fixedly connected to the rear side of the upper surface of the left end of the box body 1, and an exhaust outlet 3 is fixedly connected to the upper surface of the right end of the box body 1 and at a position corresponding to the fresh air inlet 2. A plurality of box doors 4 distributed at equal intervals are hinged on the front of the box body 1, and an observation window 5 is fixedly installed in the middle of the box door 4. A circulating fan connected to the fresh air inlet 2 is fixedly installed on the back of the left end of the box body 1, and the air outlet end of the circulating fan is fixedly connected to the upper air duct 7 and the lower air duct 8 through pipes respectively. A pressure gauge 6 is fixedly installed on the top of the front end of the box body 1, and a handle 14 is fixedly connected to the front end of the upper nozzle 9 and the front end of the lower nozzle 10; wherein, external air is sucked in through the fresh air inlet 2 by the circulating fan, and then sent into the upper air duct 7 and the lower air duct 8 respectively through pipes, and the upper air duct 7 and the lower air duct 8 send the fresh air to the upper nozzle 9 and the lower nozzle 10, which are blown out by the upper nozzle 9 and the lower nozzle 10 to dry the product, and finally the air in the box body 1 is discharged through the exhaust outlet 3.

[0039] In addition, the open ends of the two upper U-shaped plates 11 are arranged opposite to each other, the top ends of the two upper U-shaped plates 11 are fixedly connected to the upper air duct 7, the bottom edges of the two upper U-shaped plates 11 are inclined to form an inclined track 13, the front end of the inclined track 13 is lower than the rear end thereof, the first mounting rod 901 is slidably connected to the inclined track 13, the front ends of the two upper U-shaped plates 11 are provided with an upper groove 12 adapted to the second mounting rod 902, the second mounting rod 902 is slidably connected to the interior of the upper groove 12, and the end of the second mounting rod 902 away from the upper nozzle 9 passes through the upper groove 12 and Extending to the outside, the inner bottom wall of the upper groove 12 is flush with the inner wall of the rear end plane of the inclined track 13; the two first mounting rods 901 are placed on the outside of the inclined track 13, and then the upper nozzle 9 is pushed to move backward along the inclined track 13. When the second mounting rod 902 approaches the upper groove 12, the front end of the upper nozzle 9 is pressed downward, and the upper nozzle 9 is pushed backward at the same time to make the second mounting rod 902 enter the upper groove 12 and clamp it. The whole process is labor-saving and efficient. Since the entire operation is carried out in a fixed track, the accuracy recovery is high, which is conducive to the stability of the equipment and products.

[0040] In addition, the open ends of the two lower U-shaped plates 15 are arranged opposite to each other, the bottom ends of the two lower U-shaped plates 15 are fixedly connected to the lower air duct 8, the top of the rear end of the lower U-shaped plate 15 is provided with an oblique opening, the top ends of the two lower U-shaped plates 15 and the side away from each other are integrally formed with a guide plate 151, a guide groove is formed between the guide plate 151 and the top end of the lower U-shaped plate 15, a positioning oblique groove 152 is formed between the guide plate 151 and the oblique opening, the third mounting rod 101 is slidably connected in the guide groove and the positioning oblique groove 152, the front end of the lower U-shaped plate 15 is provided with a lower groove 153, and the fourth mounting rod 101 is provided with a lower groove 153. 2 is slidably connected to the lower groove 153; the third mounting rod 101 is placed into the outer side of the guide groove, and then the lower nozzle 10 is pushed backward along the guide groove. When the fourth mounting rod 102 approaches the lower groove 153, the front end of the lower nozzle 10 is lifted up, and the lower nozzle 10 is pushed backward at the same time to make the third mounting rod 101 enter the positioning inclined groove 152, and the fourth mounting rod 102 enters the lower groove 153 and is clamped; the whole process is as labor-saving and efficient as the upper nozzle 9. Since the whole operation is carried out in a fixed track, the accuracy recovery is high, which is conducive to the stability of the equipment and products.

[0041] In addition, the upper surface of the upper nozzle 9 contacts the lower surface of the upper air duct 7, and a first air inlet is provided in the middle of the top end of the upper nozzle 9 and the middle of the bottom end of the upper air duct 7, and a sealing ring is installed at the first air inlet; the wind in the upper air duct 7 enters the upper nozzle 9 through the first air inlet, and the sealing ring can ensure the sealing between the two.

[0042] In addition, the lower surface of the lower nozzle 10 contacts the upper surface of the lower air duct 8, and a second air inlet is provided in the middle of the lower end of the lower nozzle 10 and the middle of the top end of the lower air duct 8, and a sealing ring is installed at the second air inlet; the wind in the lower air duct 8 enters the lower nozzle 10 through the second air inlet, and the sealing ring can ensure the sealing between the two.

[0043] Example 2

[0044] The difference from the embodiment 1 is that, in order to make the upper nozzle 9 more stable after installation, Fig. 9 As shown, a positioning inclined plate groove 131 is fixedly connected to the top of the rear end plane of the inclined track 13, and the positioning inclined plate groove 131 is adapted to the first mounting rod 901, and the inner bottom wall of the positioning inclined plate groove 131 is flush with the inner bottom wall of the upper groove 12; the two first mounting rods 901 are placed on the outer side of the inclined track 13, and then the upper nozzle 9 is pushed to move backward along the inclined track 13, and when the second mounting rod 902 approaches the upper groove 12, the front end of the upper nozzle 9 is pressed downward, and when the upper nozzle 9 is pushed backward, the first mounting rod 901 can enter the positioning inclined plate groove 131 and cooperate with the upper groove 12, so that the first mounting rod 901 is limited. The whole process is labor-saving and efficient. Since the whole operation is carried out in a fixed track, the accuracy recovery is high, which is conducive to the stability of the equipment and products.

[0045] All technical features in this embodiment can be freely combined according to actual needs.

[0046] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A suspension oven nozzle that is easy to install, characterized in that: The invention comprises a box body (1), wherein the upper end and the lower end of the box body (1) are respectively fixedly connected to an upper air duct (7) and a lower air duct (8), wherein the upper air duct (7) and the lower air duct (8) are arranged opposite to each other, wherein the bottom end of the upper air duct (7) is provided with a plurality of upper nozzles (9) via a first guide mechanism, and the top end of the lower air duct (8) is provided with a lower nozzle (10) via a second guide mechanism, and the two sides of the front and rear ends of the upper nozzle (9) are respectively fixedly connected to a second mounting rod (902) and a first mounting rod (901), and each of the first guide mechanisms comprises two flat The upper U-shaped plates (11) are arranged in parallel, the upper nozzle (9) is slidably connected between the two upper U-shaped plates (11) through a first mounting rod (901) and a second mounting rod (902), the front and rear ends of the lower nozzle (10) are respectively fixedly connected to the fourth mounting rod (102) and the third mounting rod (101), each of the second guide mechanisms comprises two lower U-shaped plates (15) arranged in parallel, and the lower nozzle (10) is slidably connected between the two lower U-shaped plates (15) through the third mounting rod (101) and the fourth mounting rod (102).

2. The suspension oven nozzle that is easy to install according to claim 1 is characterized in that: A fresh air inlet (2) is fixedly connected to the rear side of the upper surface of the left end of the box body (1); an exhaust port (3) is fixedly connected to the upper surface of the right end of the box body (1) and at a position corresponding to the fresh air inlet (2); a plurality of box doors (4) are hingedly connected to the front of the box body (1) and are distributed at equal intervals; an observation window (5) is fixedly installed in the middle of the box door (4); a circulation fan connected to the fresh air inlet (2) is fixedly installed on the back of the left end of the box body (1); the air outlet end of the circulation fan is fixedly connected to the upper air duct (7) and the lower air duct (8) through pipelines; a pressure gauge (6) is fixedly installed on the top of the front end of the box body (1); and handles (14) are fixedly connected to the front ends of the upper nozzle (9) and the lower nozzle (10).

3. The suspension oven nozzle that is easy to install according to claim 1 is characterized in that: The open ends of the two upper U-shaped plates (11) are arranged opposite to each other, the top ends of the two upper U-shaped plates (11) are fixedly connected to the upper air duct (7), the bottom edges of the two upper U-shaped plates (11) are inclined to form an inclined track (13), the front end of the inclined track (13) is lower than the rear end thereof, and the first mounting rod (901) is slidably connected to the inclined track (13).

4. The suspension oven nozzle that is easy to install according to claim 3 is characterized by: The front ends of the two upper U-shaped plates (11) are provided with an upper groove (12) adapted to the second mounting rod (902); the second mounting rod (902) is slidably connected to the interior of the upper groove (12); the end of the second mounting rod (902) away from the upper nozzle (9) passes through the upper groove (12) and extends to the outside; the inner bottom wall of the upper groove (12) is flush with the rear end plane inner wall of the inclined track (13).

5. The suspension oven nozzle that is easy to install according to claim 3 is characterized in that: The open ends of the two lower U-shaped plates (15) are arranged opposite to each other, the bottom ends of the two lower U-shaped plates (15) are fixedly connected to the lower air duct (8), the top of the rear end of the lower U-shaped plate (15) is provided with an oblique opening, the top ends of the two lower U-shaped plates (15) and the sides away from each other are integrally formed with a guide plate (151), a guide groove is formed between the guide plate (151) and the top end of the lower U-shaped plate (15), and a positioning oblique groove (152) is formed between the guide plate (151) and the oblique opening.

6. The suspension oven nozzle that is easy to install according to claim 5 is characterized in that: The third mounting rod (101) is slidably connected in the guide groove and the positioning inclined groove (152), the front end of the lower U-shaped plate (15) is provided with a lower groove (153), and the fourth mounting rod (102) is slidably connected in the lower groove (153).

7. The suspension oven nozzle that is easy to install according to claim 1 is characterized in that: The upper surface of the upper nozzle (9) contacts the lower surface of the upper air duct (7), and a first air inlet is provided at the middle of the top end of the upper nozzle (9) and the middle of the bottom end of the upper air duct (7), and a sealing ring is installed at the first air inlet.

8. The suspension oven nozzle that is easy to install according to claim 1 is characterized by: The lower surface of the lower nozzle (10) contacts the upper surface of the lower air duct (8), and a second air inlet is provided at the middle of the lower end of the lower nozzle (10) and the middle of the top end of the lower air duct (8), and a sealing ring is installed at the second air inlet.

9. The suspension oven nozzle that is easy to install according to claim 4 is characterized in that: A positioning inclined plate groove (131) is fixedly connected to the top of the rear end plane of the inclined track (13), the positioning inclined plate groove (131) is adapted to the first mounting rod (901), and the inner bottom wall of the positioning inclined plate groove (131) is flush with the inner bottom wall of the upper groove (12).

10. A method for installing a suspension oven nozzle, characterized in that: When installing the suspension oven nozzle, the first guide mechanism and the second guide mechanism are used to guide the upper nozzle (9) and the lower nozzle (10), the first installation rod (901) is placed on the outer side of the inclined track (13), and then the upper nozzle (9) is pushed to move backward along the inclined track (13); when the second installation rod (902) approaches the upper groove (12), the front end of the upper nozzle (9) is pressed downward, and at the same time, the upper nozzle (9) is pushed inward so that the second installation rod (902) enters the upper groove (12); the third installation rod (101) is placed on the outer side of the guide groove, and then the lower nozzle (10) is pushed to move backward along the guide groove; when the fourth installation rod (102) approaches the lower groove (153), the front end of the lower nozzle (10) is lifted up, and at the same time, the lower nozzle (10) is pushed backward so that the third installation rod (101) enters the positioning inclined groove (152), and the fourth installation rod (102) enters the lower groove and is clamped.

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