CN220767075U - Metal surface heat treatment processingequipment - Google Patents

Abstract

The utility model discloses a metal surface heat treatment processing device, which relates to the technical field of metal surface heat treatment and comprises a main body, wherein the top of the main body is fixedly connected with a water tank, a rectangular groove is formed in the top of the front surface of the main body, and a movable groove is formed in the back surface of the bottom of the inner wall of the rectangular groove. According to the utility model, the main body, the water tank, the rectangular groove, the movable groove, the first threaded rod, the first motor, the first electric box, the sleeve block and the lifting assembly are matched with each other, the first motor on the inner wall of the first electric box is started, the first motor drives the first threaded rod to rotate on the inner wall of the movable groove, the first threaded rod is prevented from shifting when rotating through the movable groove, the first threaded rod drives the sleeve block to move left and right, the first threaded rod drives the nut, the induction coil and the spray pipe to move left and right through the lifting assembly, the induction coil and the spray pipe can be aligned with metal, and the induction coil and the spray pipe can move left and right to perform rapid cooling treatment on the heated surface of the metal better, so that uneven phenomenon of the metal is avoided.

Description

Metal surface heat treatment processingequipment

Technical Field

The utility model relates to the technical field of metal surface heat treatment, in particular to a metal surface heat treatment processing device.

Background

With the development of technology, heat treatment is needed in the forging process of many parts to improve the hardness, and the heat treatment of the metal surface is a metal heat treatment process for obtaining the required performance by heating, cooling and changing the structure of the surface layer of the workpiece.

When ordinary metal surface heat treatment device is in use, adopt flame heating quenching can lead to the metal surface to be heated unevenly, lead to the fracture easily, during induction heating heat treatment, metal surface cooling time is longer, can not rapid cooling, influence work efficiency, during the work piece carries out surface heat treatment, induction coil is limited to metal surface heat treatment's size, induction coil fixed in position, heat treatment efficiency is slow, for this we propose a metal surface heat treatment processingequipment, put forward the publication number among the prior art: CN213507070U, the above-mentioned novel processing apparatus that discloses that relates to metal surface heat treatment technical field specifically is a processing apparatus that processes metal surface heat treatment, including the mount, the last fixed surface of mount bottom installs the clamping platform, and the clamping platform is in the center of mount bottom upper surface, one side fixedly connected with limiting plate of clamping platform top surface, the opposite side fixedly connected with threaded rod of clamping platform top surface, this processing apparatus that processes metal surface, through the cooperation use of induction coil and spray pipe, utilizes induction coil's vortex effect to carry out the heat treatment to metal surface, when metal surface temperature reaches the requirement, utilizes the water jet blowout rivers that annular spray pipe surface evenly offered, carries out rapid cooling treatment to the surface after the metal heating for metal surface can form martensite rapidly, reaches the effect of quenching, has improved the convenience when the device was used.

In the prior art, though the induction coil and the water spray pipe are matched for use, the eddy current effect of the induction coil is utilized for carrying out heat treatment on the metal surface, when the temperature of the metal surface reaches the requirement, the water spray port evenly arranged on the surface of the annular water spray pipe is utilized for carrying out rapid cooling treatment on the surface after metal heating, so that martensite can be rapidly formed on the metal outer surface, the quenching effect is achieved, the convenience of the device in use is improved, but the processing device is inconvenient to move, so that the effect of time and labor waste is caused when the whole movement is needed, the existing processing device does not seal when carrying out rapid cooling treatment on the surface after metal heating, the cooling speed is reduced due to metal and air contact, and the water spray port is sprayed out easily.

Disclosure of Invention

The utility model aims to provide a metal surface heat treatment processing device which is used for solving the problems in the background technology.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a metal surface heat treatment processingequipment, includes the main part, the top fixedly connected with water tank of main part, rectangular groove has been seted up at the positive top of main part, the back of rectangular inslot wall bottom has been seted up and has been removed the groove, the inner wall that removes the groove is provided with threaded rod one, threaded rod one's one end runs through to the left side of main part, threaded rod one's one end fixedly connected with motor one, motor one's outer wall fixedly connected with electronic box one, electronic box one's one end with the left side fixedly connected with of main part, the outer wall threaded connection of removal groove has the cover piece, the cover piece is located remove the inner wall of groove, the top of cover piece is provided with lifting assembly.

Adopt above-mentioned technical scheme, through setting up the main part in this scheme, the water tank, rectangular groove, the removal groove, threaded rod one, motor one, electric box one, cover piece and lifting unit mutually support, motor one of starting an inner wall of the electric box, motor one is driven threaded rod one and is moving the inslot wall rotation, prevent through the removal groove that threaded rod one from producing the skew when rotatory, threaded rod one drives the cover piece and moves about, threaded rod one drives nut through lifting unit, induction coil and spray tube and moves about, make induction coil and spray tube can aim at the metal, induction coil and spray tube move about can be better carry out rapid cooling treatment to the surface after the metal heating, in order to avoid the inhomogeneous phenomenon to appear in the metal.

The technical scheme of the utility model is further improved as follows: the lifting component comprises a first partition plate, a placing plate is arranged at the top of the first partition plate, shaft rods are fixedly connected to two sides of the top of the first partition plate, one ends of the shaft rods penetrate through the top of the placing plate and are in sliding connection with the placing plate, and a third threaded rod is arranged on the inner side of the first partition plate, close to the shaft rods.

Adopt above-mentioned technical scheme, through setting up baffle one in this scheme, place the board, axostylus axostyle and threaded rod three mutually support, threaded rod three drives nut at top, induction coil and spray tube reciprocates, place the board and carry out spacing and support it through both sides axostylus axostyle, prevent to place the board and produce the skew when reciprocating, when moving to suitable height, induction coil is in parallel relation with the horizontal plane, utilize induction coil's vortex effect, make induction coil produce a large amount of heat, can the quick heating work piece surface metal, and the metal is heated evenly, the speed of work piece metal heat treatment has been guaranteed.

The technical scheme of the utility model is further improved as follows: the third threaded rod penetrates through the top of the placing plate and is in threaded connection with the placing plate, the second partition plate is fixedly connected to the top of the shaft rod, the second electric box is fixedly connected to the top of the second partition plate, the second motor is fixedly connected to the inner wall of the second electric box, and the third threaded rod penetrates through the top of the second partition plate and is fixedly connected with the second motor.

By adopting the technical scheme, in the scheme, the second partition plate, the second electric box and the second motor are matched with each other, the second motor on the inner wall of the second electric box is started to drive the third threaded rod to rotate, and the third threaded rod drives the placing plate on the outer wall to move up and down.

The technical scheme of the utility model is further improved as follows: the top of placing the board is provided with the nut, the positive top of nut is provided with induction coil, the positive bottom of nut is provided with the spray tube, the one end intercommunication of spray tube has the water pipe, the one end of water pipe extends to the inside of water tank, the inside fixedly connected with suction pump of water tank, the output of suction pump with the one end intercommunication of water pipe.

Adopt above-mentioned technical scheme, through setting up the nut in this scheme, induction coil, the spray tube, water pipe and suction pump mutually support, the spray tube is the ring, the water jet has been seted up to the surface of spray tube, through the suction pump of starting water pipe one end, the suction pump is to putting the inside water suction water pipe of water tank, offer evenly distributed's water jet through the ring-shaped spray tube surface and spray water on waterproof sticky tape membrane and cool off with higher speed, and the water jet is at the surface evenly symmetric distribution of spray tube, spray tube and induction coil are in same horizontal plane, when reaching quenching temperature, utilize water jet blowout rivers, cool off the metal fast, the speed of device to metal surface quenching has been improved.

The technical scheme of the utility model is further improved as follows: the rectangular groove is close to the top fixedly connected with breakwater of removal groove, the round hole has been seted up in the front of rectangular inslot wall bottom, the round hole sets up to a plurality of, the main part is close to the water catch bowl has been seted up to the bottom of round hole, the front intercommunication in main part left side has the delivery port.

By adopting the technical scheme, in the scheme, the water retaining block, the round hole, the water collecting tank and the water outlet are mutually matched, and the sprayed water enters the inner wall of the water collecting tank through the round hole and flows out of the inner wall of the water collecting tank through the left water outlet.

The technical scheme of the utility model is further improved as follows: the left side fixedly connected with splint first of rectangular inslot wall, splint first's right side is provided with splint second, splint second's right side swing joint has threaded rod second, threaded rod second's one end runs through to the right side of main part, threaded rod second's one end fixedly connected with carousel.

By adopting the technical scheme, in the scheme, the clamping plate I, the clamping plate II, the threaded rod II and the rotary table are mutually matched, the rotary table drives the threaded rod to move leftwards through rotating the rotary table, the threaded rod II drives the clamping plate to move leftwards, and metal is clamped through the clamping plate I matching of the clamping plate on the left side.

The technical scheme of the utility model is further improved as follows: the front both sides of main part are through hinge swing joint has the door plant, both sides the front fixedly connected with handle of door plant, the back fixedly connected with L type frame of main part, the front and the back of main part bottom both sides are all fixedly connected with universal wheel.

By adopting the technical scheme, the door plate, the handle, the L-shaped frame and the universal wheels are mutually matched, the door plates at two sides are pulled outwards by the handles at two sides, metal is placed on the right side of the clamping plate I, and the main body is moved through the L-shaped frame and the universal wheels.

By adopting the technical scheme, compared with the prior art, the utility model has the following technical progress: the metal is clamped by the clamping plate moving to the left through the cooperation of the clamping plate on the left.

1. The utility model provides a metal surface heat treatment processing device, which is characterized in that a main body, a water tank, a rectangular groove, a moving groove, a first threaded rod, a first motor, a first electric box, a sleeve block and a lifting assembly are mutually matched, the first motor on the inner wall of the first electric box is started, the first motor drives the first threaded rod to rotate on the inner wall of the moving groove, the first threaded rod is prevented from shifting when rotating through the moving groove, the first threaded rod drives the sleeve block to move left and right, the first threaded rod drives a nut, an induction coil and a spray pipe to move left and right through the lifting assembly, the induction coil and the spray pipe can be aligned to metal, and the left and right movement of the induction coil and the spray pipe can be used for carrying out rapid cooling treatment on the surface of the heated metal better so as to avoid uneven metal.

2. The utility model provides a metal surface heat treatment processing device, which is characterized in that a first partition plate, a placing plate, a shaft rod and a third threaded rod are arranged to be matched with each other, the third threaded rod drives a nut, an induction coil and a spray pipe at the top to move up and down, the placing plate limits and supports the nut, the induction coil and the spray pipe through the two side shafts, the placing plate is prevented from shifting when moving up and down, the induction coil is in parallel relation with a horizontal plane when moving to a proper height, a great amount of heat is generated by the induction coil by utilizing the eddy current effect of the induction coil, the metal on the surface of a workpiece can be heated rapidly, the metal is heated uniformly, and the metal heat treatment rate of the workpiece is ensured.

3. The utility model provides a metal surface heat treatment processing device, which is characterized in that a door plate, handles, an L-shaped frame and universal wheels are arranged to be matched with each other, the door plates at two sides are pulled outwards by the handles at two sides, metal is placed on the right side of a clamping plate I, and a main body is moved through the L-shaped frame and the universal wheels.

Drawings

FIG. 1 is a right side view of the body of the present utility model;

FIG. 2 is a left side view of the body of the present utility model;

FIG. 3 is a cross-sectional view of the body of the present utility model;

fig. 4 is a block diagram of a lifting assembly according to the present utility model.

In the figure: 1. a main body; 2. a water tank; 3. an L-shaped frame; 4. a universal wheel; 5. a rectangular groove; 6. a moving groove; 7. a first threaded rod; 8. an electric box I; 9. a first motor; 10. sleeving blocks; 11. a lifting assembly; 111. a first partition board; 112. a third threaded rod; 113. a shaft lever; 114. placing a plate; 115. a second partition board; 116. an electric box II; 117. a second motor; 12. a nut; 13. a water pipe; 14. an induction coil; 15. a spray pipe; 16. a water collection tank; 17. a round hole; 18. a water blocking block; 19. a water outlet; 20. a turntable; 21. a second threaded rod; 22. a clamping plate II; 23. a clamping plate I; 24. a water suction pump; 25. a door panel; 26. a handle.

Detailed Description

The utility model is further illustrated by the following examples:

example 1

As shown in fig. 1-4, the utility model provides a metal surface heat treatment processing device, which comprises a main body 1, wherein the top of the main body 1 is fixedly connected with a water tank 2, the top of the front surface of the main body 1 is provided with a rectangular groove 5, the back of the bottom of the inner wall of the rectangular groove 5 is provided with a movable groove 6, the inner wall of the movable groove 6 is provided with a threaded rod 7, one end of the threaded rod 7 penetrates through the left side of the main body 1, one end of the threaded rod 7 is fixedly connected with a motor 9, the outer wall of the motor 9 is fixedly connected with an electric box 8, one end of the electric box 8 is fixedly connected with the left side of the main body 1, the outer wall of the movable groove 6 is in threaded connection with a sleeve block 10, the sleeve block 10 is positioned on the inner wall of the movable groove 6, the top of the sleeve block 10 is provided with a lifting component 11, the lifting assembly 11 comprises a first partition plate 111, a placing plate 114 is arranged at the top of the first partition plate 111, shaft rods 113 are fixedly connected to two sides of the top of the first partition plate 111, one ends of the shaft rods 113 on two sides penetrate through the top of the placing plate 114 and are in sliding connection with the placing plate 114, a third threaded rod 112 is arranged on the inner side, close to the shaft rods 113, of the first partition plate 111, the third threaded rod 112 penetrates through the top of the placing plate 114 and is in threaded connection with the placing plate 114, a second partition plate 115 is fixedly connected to the top of the second partition plate 115, an electric box 116 is fixedly connected to the inner wall of the second electric box 116, a second motor 117 is fixedly connected to the inner wall of the second partition plate 116, and the third threaded rod 112 penetrates through the top of the second partition plate 115 and is fixedly connected with the second motor 117.

In the embodiment, through the mutual matching of the main body 1, the water tank 2, the rectangular groove 5, the moving groove 6, the threaded rod 7, the motor 9, the electric box 8, the sleeve block 10 and the lifting component 11, the motor 9 on the inner wall of the electric box 8 is started, the motor 9 drives the threaded rod 7 to rotate on the inner wall of the moving groove 6, the threaded rod 7 is prevented from generating deflection when rotating through the moving groove 6, the threaded rod 7 drives the sleeve block 10 to move left and right, the threaded rod 7 drives the nut 12, the induction coil 14 and the spray pipe 15 to move left and right through the lifting component 11, the induction coil 14 and the spray pipe 15 can be aligned with metal, the surface of the heated metal can be rapidly cooled by the left and right movement of the induction coil 14 and the spray pipe 15 so as to avoid the uneven phenomenon of the metal, through setting up baffle one 111, place the board 114, axostylus axostyle 113 and threaded rod three 112 mutually support, threaded rod three 112 drives nut 12 at top, induction coil 14 and spray tube 15 reciprocates, place the board 114 and carry out spacing and support it through both sides axostylus axostyle 113, prevent to place the board 114 and produce the skew when reciprocating, when moving to suitable height, induction coil 14 is in parallel relation with the horizontal plane, utilize induction coil 14's vortex effect, make induction coil 14 produce a large amount of heats, can rapid heating work piece surface metal, and the metal is heated evenly, the speed of work piece metal heat treatment has been guaranteed, through setting up baffle two 115, electric box two 116 and motor two 117 mutually support, start motor two 117 of electric box two 116 inner wall, drive threaded rod three 112 rotation, the placing board 114 of threaded rod three 112 drive the outer wall reciprocates.

Example 2

As shown in fig. 1-4, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the top of placing plate 114 is provided with nut 12, nut 12 positive top is provided with induction coil 14, nut 12 positive bottom is provided with spray tube 15, spray tube 15's one end intercommunication has water pipe 13, water pipe 13's one end extends to the inside of water tank 2, water tank 2's inside fixedly connected with suction pump 24, suction pump 24's output and water pipe 13's one end intercommunication, rectangular tank 5 is close to the top fixedly connected with manger plate 18 of removal groove 6, round hole 17 has been seted up in rectangular tank 5 inner wall bottom's front, round hole 17 sets up to a plurality of, main part 1 has been close to the bottom of round hole 17 and has been seted up water catch bowl 16, main part 1 left side's front intercommunication has delivery port 19, rectangular tank 5 inner wall's left side fixedly connected with splint one 23, splint one 23's right side is provided with splint two 22, splint two 22's right side swing joint has threaded rod two 21, two 21's one end runs through to main part 1's right side, threaded rod two 21's one end fixedly connected with carousel 20, main part 1 front both sides are through hinge swing joint 25, door plant 25's front fixedly connected with handle 26, main part 1 back door plant 1 is connected with back side 3, L type 1 back and the front of all is connected with universal wheel 4 of main part 1.

In the embodiment, the nut 12, the induction coil 14, the spray pipe 15, the water pipe 13 and the water suction pump 24 are mutually matched, the spray pipe 15 is in a circular shape, the water jet is arranged on the outer surface of the spray pipe 15, the water suction pump 24 at one end of the water pipe 13 is started to suck water in the water storage tank 2 into the water pipe 13, the water jet which is uniformly distributed is arranged on the surface of the circular spray pipe 15 to spray the water on the waterproof adhesive tape film for accelerated cooling, the water jet is uniformly and symmetrically distributed on the outer surface of the spray pipe 15, the spray pipe 15 and the induction coil 14 are positioned on the same horizontal plane, when the metal on the surface of a workpiece reaches the quenching temperature, the water jet is utilized to spray water to rapidly cool the metal, the rate of the device for quenching the metal surface is improved, through setting up manger plate piece 18, round hole 17, water catch bowl 16 and delivery port 19 mutually support, spun water gets into water catch bowl 16 inner wall through round hole 17, flow out water catch bowl 16 inner wall through left delivery port 19, through setting up splint one 23, splint two 22, threaded rod two 21 and carousel 20 mutually support, through rotating carousel 20, carousel 20 drives threaded rod two 21 and moves left, threaded rod two 21 drives splint two 22 and moves left, move left through splint two 22 and press from both sides tightly through left splint one 23 cooperation to the metal, through setting up door plant 25, handle 26, L type frame 3, and universal wheel 4 mutually support, pull both sides door plant 25 outwards through both sides handle 26, put the metal on the right side of splint one 23, move main part 1 through L type frame 3 and universal wheel 4.

The working principle of the metal surface heat treatment processing device is specifically described below.

When in use, as shown in fig. 1-4, a user pulls the door plates 25 on two sides outwards through the handles 26 on two sides to place metal on the right side of the clamping plate I23, the rotating disc 20 drives the threaded rod II 21 to move leftwards through the rotating disc 20, the threaded rod II 21 drives the clamping plate II 22 to move leftwards through the clamping plate II 22 to clamp the metal through the matching of the left clamping plate I23, the motor I9 on the inner wall of the electric box I8 is started, the motor I9 drives the threaded rod I7 to rotate on the inner wall of the moving groove 6, the threaded rod I7 is prevented from shifting during rotation through the moving groove 6, the threaded rod I7 drives the sleeve block 10 to move leftwards and rightwards, the threaded rod I7 drives the nut 12, the induction coil 14 and the spray pipe 15 to move leftwards and rightwards through the lifting assembly 11, the induction coil 14 and the spray pipe 15 can be aligned with the metal, and the surface of the induction coil 14 and the spray pipe 15 after being heated can be better cooled rapidly, in order to avoid the uneven phenomenon of metal, the motor II 117 and 177 on the inner wall of the electric box II 116 is started to drive the threaded rod III 112 to rotate, the threaded rod III 112 drives the placing plate 114 on the outer wall to move up and down, the threaded rod III 112 drives the nut 12 on the top, the induction coil 14 and the spray pipe 15 to move up and down, the placing plate 114 limits and supports the placing plate 114 through the shaft rods 113 on the two sides, the placing plate 114 is prevented from shifting when moving up and down, when the placing plate 114 moves to a proper height, the induction coil 14 is in parallel relation with the horizontal plane, the induction coil 14 generates a large amount of heat by utilizing the eddy current effect of the induction coil 14, the metal on the surface of a workpiece can be heated rapidly, the metal is heated uniformly, the metal heat treatment rate of the workpiece is ensured, the spray pipe 15 is in a circular ring shape, the outer surface of the spray pipe 15 is provided with a water spray hole through starting the water suction pump 24 on one end of the water pipe 13, the water suction pump 24 sucks water in the water pipe 13 in the water tank 2, water is sprayed on the waterproof adhesive tape film through evenly distributed water spraying ports formed in the surface of the annular spray pipe 15 for accelerated cooling, the water spraying ports are evenly and symmetrically distributed on the outer surface of the spray pipe 15, the spray pipe 15 and the induction coil 14 are positioned on the same horizontal plane, when the metal on the surface of a workpiece reaches the quenching temperature, water is sprayed out of the water spraying ports to rapidly cool the metal, the quenching speed of the device on the metal surface is improved, sprayed water enters the inner wall of the water collecting tank 16 through the round hole 17, flows out of the inner wall of the water collecting tank 16 through the left water outlet 19, and a user moves the main body 1 through the L-shaped frame 3 and the universal wheels 4.

The foregoing utility model has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.

Claims (7)

1. The metal surface heat treatment processing device comprises a main body (1), and is characterized in that: the utility model discloses a novel electric water heater, including main part (1), rectangular groove (5) have been seted up at the top of main part (1), remove groove (6) have been seted up at the back of rectangular groove (5) inner wall bottom, the inner wall of removing groove (6) is provided with threaded rod one (7), the one end of threaded rod one (7) runs through to the left side of main part (1), the one end fixedly connected with motor one (9) of threaded rod one (7), the outer wall fixedly connected with electric box one (8) of motor one (9), the one end of electric box one (8) with the left side fixed connection of main part (1), the outer wall threaded connection of removing groove (6) has cover piece (10), cover piece (10) are located the inner wall of removing groove (6), the top of cover piece (10) is provided with lifting assembly (11).

2. The metal surface heat treatment apparatus according to claim 1, wherein: lifting assembly (11) are including baffle one (111), the top of baffle one (111) is provided with places board (114), the both sides at baffle one (111) top are all fixedly connected with axostylus axostyle (113), both sides the one end of axostylus axostyle (113) all runs through to place the top of board (114) and with place board (114) sliding connection, baffle one (111) is close to the inboard of axostylus axostyle (113) is provided with threaded rod three (112).

3. A metal surface heat treatment apparatus according to claim 2, wherein: the third threaded rod (112) penetrates through the top of the placing plate (114) and is in threaded connection with the placing plate (114), the top end of the shaft rod (113) is fixedly connected with a second partition plate (115), the top of the second partition plate (115) is fixedly connected with a second electric box (116), the inner wall of the second electric box (116) is fixedly connected with a second motor (117), and the third threaded rod (112) penetrates through the top of the second partition plate (115) and is fixedly connected with the second motor (117).

4. A metal surface heat treatment apparatus according to claim 2, wherein: the top of placing board (114) is provided with nut (12), the positive top of nut (12) is provided with induction coil (14), the positive bottom of nut (12) is provided with spray tube (15), the one end intercommunication of spray tube (15) has water pipe (13), the one end of water pipe (13) extends to the inside of water tank (2), the inside fixedly connected with water suction pump (24) of water tank (2), the output of water suction pump (24) with the one end intercommunication of water pipe (13).

5. The metal surface heat treatment apparatus according to claim 1, wherein: the utility model discloses a water-saving device for the water-saving device, including rectangular groove (5), movable groove (6), round hole (17) are seted up in the front of rectangular groove (5) inner wall bottom, round hole (17) set up to a plurality of, water catch bowl (16) have been seted up in the bottom that main part (1) is close to round hole (17), the front intercommunication in main part (1) left side has delivery port (19).

6. The metal surface heat treatment apparatus according to claim 1, wherein: the left side fixedly connected with splint one (23) of rectangular groove (5) inner wall, the right side of splint one (23) is provided with splint two (22), the right side swing joint of splint two (22) has threaded rod two (21), the one end of threaded rod two (21) runs through to the right side of main part (1), the one end fixedly connected with carousel (20) of threaded rod two (21).

7. The metal surface heat treatment apparatus according to claim 1, wherein: the novel bicycle is characterized in that door plates (25) are movably connected to two sides of the front side of the main body (1) through hinges, handles (26) are fixedly connected to the front side of the door plates (25) on two sides of the main body, an L-shaped frame (3) is fixedly connected to the back side of the main body (1), and universal wheels (4) are fixedly connected to the front side and the back side of the two sides of the bottom of the main body (1).