CN210730276U

CN210730276U - Machine part washs drying device

Info

Publication number: CN210730276U
Application number: CN201920624161.6U
Authority: CN
Inventors: 钱学琴
Original assignee: Qian Xueqin
Current assignee: Qian Xueqin
Priority date: 2019-05-04
Filing date: 2019-05-04
Publication date: 2020-06-12
Anticipated expiration: 2029-05-04

Abstract

The utility model provides a mechanical part cleaning and drying device, which comprises a third mounting frame; the support frame is characterized in that two ends of the outer lower surface of the third mounting frame are symmetrically and fixedly welded with the support frame; the transmission rod is arranged in the right end wall of the first frame body, waterproof rubber is arranged on the outer surface of the transmission rod, and a first rotating rod is fixedly welded at the left end of the transmission rod; a roller is fixedly arranged on the outer surface of the first rotating rod; the roller is arranged below the feeding port, and the outer surface of the roller is fixedly provided with a brush; the switch is arranged below the second frame body; the outer ends of the hydraulic rods are symmetrically and fixedly arranged on the left wall and the right wall of the middle part of the inner side of the first frame body, and a second mounting plate is arranged below the hydraulic rods; a rotating platform is arranged below the second mounting plate; a second rotating rod is fixedly welded on the lower surface of the rotating table; the rear side of the lower part of the second rotating rod is rotatably connected with a second motor, and the lower end of the second rotating rod is rotatably connected in the mounting base; the utility model discloses the security is high, and convenient operation accords with various service conditions, and the practicality is high.

Description

Machine part washs drying device

Technical Field

The utility model relates to a mechanical technical equipment specifically is a machine part washs drying device.

Background

A machine element (also called a machine part) is a basic element constituting a machine, and is an inseparable single part constituting the machine and a machine; it is a discipline for the study and design of mechanical basic parts in various devices, also known as parts and components. The specific contents of the mechanical parts comprise: 1. zero (part) coupling. Such as screw coupling, wedge coupling, pin coupling, key coupling, spline coupling, interference fit coupling, elastic ring coupling, riveting, welding, gluing, etc.; 2. mechanical transmission such as belt transmission, friction wheel transmission, key transmission, harmonic transmission, gear transmission, rope transmission, spiral transmission and the like for transmitting motion and energy, and corresponding shafting zero (parts) such as a transmission shaft, a coupler, a clutch, a brake and the like; 3. parts for supporting, such as bearings, boxes, bases and the like; 4. lubrication systems and seals for lubrication, etc.; 5. springs, and other components.

As is well known, machines are constructed by many different mechanical parts, so that each factory needs to separately process the individual parts, and a large amount of oil stains are generated on the surfaces of the mechanical parts in the production process of the mechanical parts, and in the prior art, the oil stains on the parts are generally not cleaned or manually cleaned, however, if the oil stains are not cleaned, the efficiency of the mechanical work is greatly influenced, and the manual cleaning efficiency is low, and some parts have sharp edges and even have potential safety hazards, so that the development of an automatic and efficient cleaning device is necessary.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a machine part washs drying device to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a mechanical part cleaning and drying device comprises a third mounting frame; the support frame is characterized in that two ends of the outer lower surface of the third mounting frame are symmetrically and fixedly welded with the support frame; limiting frames are symmetrically and fixedly welded at two ends of the outer upper surface of the third mounting frame; a cleaning barrel is arranged on the inner side of the left end of the limiting frame; the cleaning barrel is arranged on the upper surface of the outer left end of the third mounting frame, and a first frame body is arranged on the right side of the cleaning barrel; a feeding port is fixedly embedded in the upper wall of the first frame body, and a second frame body is fixedly welded on the outer surface of the right end of the first frame body; a first motor is arranged at the left end in the second frame body; the first motor is fixedly arranged on the upper surface of the outer part of the right end of the first frame body, and the right end of the first motor is rotatably connected with a scroll bar; the upper end and the lower end of the worm are rotatably connected in the upper wall and the lower wall inside the second frame body through bearings, the worm is arranged outside the right side of the first frame body, and the lower part of the worm is rotatably connected with a turbine; the turbine is arranged in the second frame body, the right side of the outer part of the first frame body is fixedly welded with a transmission rod in an inserting way; the transmission rod is arranged in the right end wall of the first frame body, waterproof rubber is arranged on the outer surface of the transmission rod, and a first rotating rod is fixedly welded at the left end of the transmission rod; a roller is fixedly arranged on the outer surface of the first rotating rod; the roller is arranged below the feeding port, and the outer surface of the roller is fixedly provided with a brush; a baffle plate is arranged below the roller; a first rubber pipe is embedded in the right end wall of the blocking plate; the right end of the first rubber pipe is fixedly connected in the right end wall of the first frame body, and the right side of the first rubber pipe is provided with a water outlet pipe; the water outlet pipe is fixedly welded on the right end wall of the outer part of the first frame body, the upper surface of the water outlet pipe is fixedly provided with a switch, and the lower end of the water outlet pipe is fixedly welded with a connecting block; the switch is arranged below the second frame body; the lower end of the connecting block is fixedly connected with a second rubber tube; the lower part of the second rubber pipe is arranged in the sewage collecting barrel; the sewage collecting barrel is arranged on the upper surface of the outer part of the right end of the first frame body; the lower surface of the blocking plate is rotatably connected with a hydraulic rod; the outer ends of the hydraulic rods are symmetrically and fixedly arranged on the left wall and the right wall of the middle part of the inner side of the first frame body, and a second mounting plate is arranged below the hydraulic rods; a rotating platform is arranged below the second mounting plate; a second rotating rod is fixedly welded on the lower surface of the rotating table; the rear side of the lower part of the second rotating rod is rotatably connected with a second motor, and the lower end of the second rotating rod is rotatably connected in the mounting base; the mounting base is fixedly welded on the lower surface of the middle part of the inner side of the first frame body; and the second motor is fixedly arranged on the lower surface of the right end of the inner side of the first frame body.

As a further aspect of the present invention: the first frame body is fixedly welded on the upper surface of the middle part of the outer side of the third mounting frame, and the lower part of the outer surface of the front end of the first frame body is rotatably connected with a working door through a hinge; the working door is arranged above the third mounting frame, the outer surface of the right end of the working door is fixedly provided with a handle, and a gas dispersing net is arranged above the working door; the air dispersing net is embedded and installed on the wall of the middle part of the front end of the first frame body.

As a further aspect of the present invention: a water conveying pipe is embedded in the left end wall of the upper part of the first frame body; the lower part of the water delivery pipe is arranged in the cleaning barrel, the lower end of the water delivery pipe is fixedly provided with a filter screen, and the middle part of the water delivery pipe is inserted with a first mounting plate; the filter screen is arranged on the outer side of the left end of the first frame body; the right end of the first mounting plate is welded on the outer wall of the left end of the first frame body, and the upper surface of the first mounting plate is fixedly connected with a water pump; the water pump is fixedly connected to the water delivery pipe.

As a further aspect of the present invention: the first rotating rod is arranged in the first frame body, and the left end of the first rotating rod is rotatably connected into the left end wall of the first frame body through a bearing.

As a further aspect of the present invention: the blocking plates are symmetrically and rotatably connected to the left and right walls in the first frame body, water blocking covers are arranged above the left and right ends of the blocking plates, and rubber blocks are fixedly mounted on the inner sides of the blocking plates; and the upper part of the water blocking cover is fixedly welded on the left wall and the right wall in the first frame body.

As a further aspect of the present invention: the outer ends of the second mounting plates are symmetrically and fixedly welded on the left wall and the right wall below the inner part of the first frame body, and gas transmission pipes are fixedly mounted in the second mounting plates; the lower end of the gas pipe is fixedly connected to the wind-heat engine; the wind and heat machine is fixedly arranged on the inner lower surface of the third mounting frame, and the lower end of the wind and heat machine is provided with an air inlet net; the air inlet net is fixedly embedded in the middle wall of the lower end of the third mounting frame.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a closed clearance, the effectual possibility that has prevented the greasy dirt diffusion has also improved the holistic security of device simultaneously greatly, and the sewage collecting vessel of device right-hand member installation can be collected the greasy dirt of the completion of device internal processing in unison to unified the processing after the work is accomplished, has saved a large amount of time, and drying device has still been installed to the device is inside, can fall the moisture treatment on the mechanical parts surface that finishes that washs the very first time, has successfully reduced the rusty possibility in part later stage, the utility model discloses the security is high, and convenient operation accords with various service conditions, and the practicality is high.

Drawings

FIG. 1 is a schematic structural diagram of a mechanical parts cleaning and drying apparatus.

FIG. 2 is a schematic structural view of a cross-sectional view of a mechanical parts cleaning and drying apparatus.

Fig. 3 is a schematic structural diagram of a drying part in the mechanical part cleaning and drying device.

In the figure: 1-a second frame body, 2-a bearing, 3-a first motor, 4-the first frame body, 5-a feeding port, 6-a rubber block, 7-a hydraulic rod, 8-a water pipe, 9-a brush, 10-a roller, 11-a first rotating rod, 12-a water blocking cover, 13-a blocking plate, 14-a water pump, 15-a first mounting plate, 16-a cleaning barrel, 17-a filter screen, 18-a limiting frame, 19-a third mounting frame, 20-a support frame, 21-a second mounting plate, 22-a rotating table, 23-a wind heat machine, 24-an air inlet net, 25-a mounting base, 26-a second rotating rod, 27-a second motor, 28-an air pipe, 29-a sewage collecting barrel, 30-a second rubber pipe and 31-a connecting block, 32-water outlet pipe, 33-switch, 34-first rubber pipe, 35-waterproof rubber, 36-turbine, 37-transmission rod, 38-scroll rod, 39-hinge, 40-working door, 41-air dispersing net and 42-handle.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Referring to fig. 1-3, a machine part cleaning and drying apparatus includes a third mounting frame 19; the third mounting frame 19 is made of steel and is mainly used for providing space for mounting other parts of the device and improving the overall stability of the device, and two ends of the outer lower surface of the third mounting frame are symmetrically and fixedly welded with support frames 20; the support frame 20 is mainly used for improving the overall safety of the lifting device; two ends of the outer upper surface of the third mounting frame 19 are symmetrically and fixedly welded with limiting frames 18; the limiting frame 18 is mainly used for fixing other parts of the device, and the cleaning barrel 16 is arranged on the inner side of the left end of the limiting frame; the cleaning barrel 16 is arranged on the upper surface of the outer left end of the third mounting frame 19 and is mainly used for storing cleaning liquid, and the right side of the cleaning barrel is provided with the first frame body 4; the first frame body 4 is fixedly welded on the upper surface of the middle part of the outer side of the third mounting frame 19, is made of steel, is in a cuboid shape, is mainly used for providing space and a carrier for mounting other components of the device, and is rotatably connected with a working door 40 through a hinge 39 at the lower part of the outer surface of the front end of the first frame body; the working door 40 is arranged above the third mounting frame 19 and is mainly used for taking out mechanical parts after cleaning is finished, a handle 42 is fixedly arranged on the outer surface of the right end of the working door, and an air dispersing net 41 is arranged above the working door; the handle 42 is mainly used for facilitating the opening and closing of the working door 40; the two air dispersing nets 41 are embedded and installed on the middle wall of the front end of the first frame body 4 and are mainly used for dispersing water vapor generated inside the device; a water delivery pipe 8 is embedded in the left end wall of the upper part of the first frame body 4; the lower part of the water delivery pipe 8 is arranged in a cleaning barrel 16 and is mainly used for delivering cleaning solution to the interior of the device, a filter screen 17 is fixedly arranged at the lower end of the water delivery pipe, and a first mounting plate 15 is inserted in the middle of the water delivery pipe; the filter screen 17 is arranged on the outer side of the left end of the first frame body 4 and is mainly used for filtering cleaning liquid to prevent impurities from damaging other parts of the device; the right end of the first mounting plate 15 is welded on the outer wall of the left end of the first frame body 4, the first mounting plate is mainly used for providing a mounting carrier for other components of the device, and the upper surface of the first mounting plate is fixedly connected with a water pump 14; the water pump 14 is fixedly connected to the water delivery pipe 8 and is mainly used for delivering cleaning liquid in the cleaning barrel 16; a feeding port 5 is fixedly embedded in the upper wall of the first frame body 4, and a second frame body 1 is fixedly welded on the outer surface of the right end; the feeding port 5 is mainly used for placing mechanical parts into the device; the second frame body 1 is mainly used for providing an installation space for other components of the device, meanwhile, the other components of the protection device are prevented from being too large in loss, and the left end of the interior of the second frame body is provided with a first motor 3; the first motor 3 is fixedly arranged on the upper surface of the outer part of the right end of the first frame body 4 and is mainly used for providing power for the device, and the right end of the first motor is rotatably connected with a scroll rod 38; the upper end and the lower end of the worm 38 are rotatably connected with the upper wall and the lower wall inside the second frame body 1 through bearings 2, are arranged outside the right side of the first frame body 4 and are mainly used for providing transmission force for the device, and the lower part of the worm is rotatably connected with a turbine 36; the turbine 36 is arranged inside the second frame body 1 and on the right side of the outside of the first frame body 4 and is mainly used for rotating connection, and a transmission rod 37 is fixedly welded inside the turbine; the transmission rod 37 is arranged in the right end wall of the first frame body 4 and is mainly used for playing a role in fixed connection, waterproof rubber 35 is arranged on the outer surface of the transmission rod, and the first rotating rod 11 is fixedly welded at the left end of the transmission rod; the waterproof rubber 35 mainly plays a role in blocking and preventing sewage in the device from leaking to the outside; the first rotating rod 11 is arranged inside the first frame body 4, and the left end of the first rotating rod is rotatably connected in the left end wall inside the first frame body 4 through the bearing 2, so that the first rotating rod is mainly used for providing an installation carrier for other parts of the device and simultaneously providing a rotary connection effect for other parts of the device; a roller 10 is fixedly arranged on the outer surface of the first rotating rod 11; the roller 10 is arranged below the feeding port 5, and the outer surface of the roller is fixedly provided with a brush 9 for removing oil stains on mechanical parts; a barrier plate 13 is arranged below the roller 10; the two blocking plates 13 are symmetrically and rotatably connected to the left wall and the right wall inside the first frame body 4 and are mainly used for blocking cleaning solution and preventing the cleaning solution from flowing into other parts below, the water blocking covers 12 are arranged above the left end and the right end of the blocking plates, and the rubber blocks 6 are fixedly arranged on the inner sides of the blocking plates; the upper part of the water blocking cover 12 is fixedly welded on the left and right walls in the first frame body 4 and is mainly used for blocking a rotating part and preventing cleaning liquid from flowing into the lower part of the device through the rotating part; the rubber block 6 mainly plays a role in sealing and auxiliary blocking; a first rubber pipe 34 is embedded in the right end wall of the blocking plate 13; the right end of the first rubber pipe 34 is fixedly connected in the right end wall of the first frame body 4 and is mainly used for discharging sewage cleaned in the device, and a water outlet pipe 32 is arranged on the right side of the first rubber pipe; the water outlet pipe 32 is fixedly welded on the right end wall of the outer part of the first frame body 4, the upper surface of the water outlet pipe is fixedly provided with a switch 33, and the lower end of the water outlet pipe is fixedly welded with a connecting block 31; the switch 33 is arranged below the second frame body 1 and is mainly used for controlling the opening and closing of the water outlet pipe 32; the connecting block 31 is mainly used for fixedly connecting, and the lower end of the connecting block is fixedly connected with a second rubber tube 30; the lower part of the second rubber tube 30 is arranged in the sewage collecting barrel 29; the sewage collecting barrel 29 is arranged on the upper surface of the outer part of the right end of the first frame body 4 and is mainly used for temporarily storing clean sewage discharged from the interior of the device; the lower surface of the blocking plate 13 is rotatably connected with a hydraulic rod 7; the outer ends of the hydraulic rods 7 are symmetrically and fixedly arranged on the left wall and the right wall of the middle part of the inner side of the first frame body 4, are mainly used for controlling the blocking plate 13 to be opened and closed, and are provided with second mounting plates 21 below; the two second mounting plates 21 are symmetrically and fixedly welded on the left wall and the right wall below the inner part of the first frame body 4 at the outer ends, are mainly used for providing mounting space for other parts of the device and limiting the opening degree of the blocking plate 13, and are internally and fixedly provided with gas transmission pipes 28; the gas pipe 28 is mainly used for conveying hot air to dry water stains on the surfaces of mechanical parts, and the lower end of the gas pipe is fixedly connected to the fan-heater 23 (model HSM); the air heating machine 23 is fixedly arranged on the inner lower surface of the third mounting frame 19 and is mainly used for providing heating and air supply functions for the device, and an air inlet net 24 is arranged at the lower end of the air heating machine; the air inlet net 24 is fixedly embedded in the middle wall of the lower end of the third mounting frame 19 and is mainly used for providing an air port; a rotating platform 22 is arranged below the second mounting plate 21; the rotating platform 22 is mainly used for storing cleaned mechanical parts, and a second rotating rod 26 is fixedly welded on the lower surface of the rotating platform; the second rotating rod 26 mainly plays a role in transmission, the rear side of the lower part of the second rotating rod is rotatably connected with a second motor 27, and the lower end of the second rotating rod is rotatably connected in the mounting base 25; the mounting base 25 is fixedly welded on the lower surface of the middle part of the inner side of the first frame body 4 and mainly plays a role in rotary connection; the second motor 27 is fixedly mounted on the lower surface of the right end of the inner side of the first frame 4, and is used for providing a rotating force for the rotating platform 22.

The utility model discloses a theory of operation is: before the device is used, the device is moved and placed in a designated place in a production workshop, cleaning solution is injected into a cleaning barrel 16, mechanical parts are put into the device through a feed opening 5, a water pump 14 is started, the cleaning solution in the cleaning barrel 16 is conveyed into the device through a water conveying pipe 8, a first motor 3 is started, the first motor 3 drives a worm 38 to rotate, the worm 38 drives a turbine 36 to rotate, namely a first rotating rod 11 starts to rotate, a brush 9 cleans oil stains on the surfaces of the mechanical parts along with the rotation of a roller 10, a switch 33 is opened after the cleaning is finished, sewage with the oil stains is conveyed into a sewage collecting barrel 29 through a second rubber pipe 30, then a hydraulic rod 7 is started, a baffle plate 13 is opened downwards, the cleaned mechanical parts fall onto a rotating platform 22, a second motor 27 and a fan heater 23 are started, the second motor drives the rotating platform 22 to rotate, the fan heater carries steam to the inside water stain to the machine part surface of device through gas-supply pipe 28 and handles, and the water stain by gasification circulates to the outside through air-dispersing net 41, waits for the water stain on machine part surface to be cleared up the back completely, opens work door 40 through handle 42 and takes out machine part and accomplish work promptly.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. A machine part cleaning and drying device comprises a third mounting frame (19); the novel fixing frame is characterized in that two ends of the outer lower surface of the third mounting frame (19) are symmetrically and fixedly welded with support frames (20); limiting frames (18) are symmetrically and fixedly welded at two ends of the outer upper surface of the third mounting frame (19); a cleaning barrel (16) is arranged on the inner side of the left end of the limiting frame (18); the cleaning barrel (16) is arranged on the upper surface of the outer left end of the third mounting frame (19), and the right side of the cleaning barrel is provided with the first frame body (4); a feeding port (5) is fixedly embedded in the upper wall of the first frame body (4), and a second frame body (1) is fixedly welded on the outer surface of the right end; a first motor (3) is arranged at the left end in the second frame body (1); the first motor (3) is fixedly arranged on the upper surface of the outer part of the right end of the first frame body (4), and the right end of the first motor is rotatably connected with a scroll bar (38); the upper end and the lower end of the worm rod (38) are rotatably connected with the upper wall and the lower wall in the second frame body (1) through a bearing (2), the worm rod is arranged outside the right side of the first frame body (4), and the lower part of the worm rod is rotatably connected with a turbine (36); the turbine (36) is arranged inside the second frame body (1), the right side of the outer part of the first frame body (4) is fixedly welded with a transmission rod (37) in an inserted mode; the transmission rod (37) is arranged in the right end wall of the first frame body (4), the outer surface of the transmission rod is provided with waterproof rubber (35), and the left end of the transmission rod is fixedly welded with the first rotating rod (11); a roller (10) is fixedly arranged on the outer surface of the first rotating rod (11); the roller (10) is arranged below the feeding port (5), and the outer surface of the roller is fixedly provided with a brush (9); a blocking plate (13) is arranged below the roller (10); a first rubber pipe (34) is embedded in the right end wall of the blocking plate (13); the right end of the first rubber pipe (34) is fixedly connected into the right end wall of the first frame body (4), and the right side of the first rubber pipe is provided with a water outlet pipe (32); the water outlet pipe (32) is fixedly welded on the right end wall of the outer part of the first frame body (4), the upper surface of the water outlet pipe is fixedly provided with a switch (33), and the lower end of the water outlet pipe is fixedly welded with a connecting block (31); the switch (33) is arranged below the second frame body (1); the lower end of the connecting block (31) is fixedly connected with a second rubber tube (30); the lower part of the second rubber pipe (30) is arranged in the sewage collecting barrel (29); the sewage collecting barrel (29) is arranged on the upper surface of the outer part of the right end of the first frame body (4); the lower surface of the blocking plate (13) is rotatably connected with a hydraulic rod (7); the outer ends of the hydraulic rods (7) are symmetrically and fixedly arranged on the left wall and the right wall of the middle part of the inner side of the first frame body (4), and a second mounting plate (21) is arranged below the hydraulic rods; a rotating table (22) is arranged below the second mounting plate (21); a second rotating rod (26) is fixedly welded on the lower surface of the rotating platform (22); the rear side of the lower part of the second rotating rod (26) is rotatably connected with a second motor (27), and the lower end of the second rotating rod is rotatably connected in the mounting base (25); the mounting base (25) is fixedly welded on the lower surface of the middle part of the inner side of the first frame body (4); the second motor (27) is fixedly arranged on the lower surface of the right end of the inner side of the first frame body (4).

2. The machine part cleaning and drying device according to claim 1, wherein the first frame body (4) is fixedly welded on the upper surface of the middle part of the outer side of the third mounting frame (19), and the lower part of the outer surface of the front end of the first frame body is rotatably connected with a working door (40) through a hinge (39); the working door (40) is arranged above the third mounting frame (19), the outer surface of the right end of the working door is fixedly provided with a handle (42), and a gas dissipation net (41) is arranged above the working door; the air dispersing net (41) is embedded and installed on the middle wall of the front end of the first frame body (4).

3. The mechanical part cleaning and drying device according to claim 1, wherein a water delivery pipe (8) is embedded in the left end wall of the upper part of the first frame body (4); the lower part of the water delivery pipe (8) is arranged in the cleaning barrel (16), the lower end of the water delivery pipe is fixedly provided with a filter screen (17), and the middle part of the water delivery pipe is inserted with a first mounting plate (15); the filter screen (17) is arranged on the outer side of the left end of the first frame body (4); the right end of the first mounting plate (15) is welded on the outer wall of the left end of the first frame body (4), and the upper surface of the first mounting plate is fixedly connected with a water pump (14); the water pump (14) is fixedly connected to the water delivery pipe (8).

4. The machine part cleaning and drying device according to claim 1, wherein the first rotating rod (11) is arranged inside the first frame body (4), and the left end of the first rotating rod is rotatably connected in the inner left end wall of the first frame body (4) through a bearing (2).

5. The machine part cleaning and drying device according to claim 1, wherein the blocking plate (13) is symmetrically and rotatably connected to the left and right walls inside the first frame body (4), water blocking covers (12) are arranged above the left and right ends of the blocking plate, and a rubber block (6) is fixedly arranged on the inner side of the blocking plate; and the upper part of the water blocking cover (12) is fixedly welded on the left wall and the right wall in the first frame body (4).

6. The machine part cleaning and drying device according to claim 1, wherein the outer ends of the second mounting plates (21) are symmetrically and fixedly welded to the left and right walls below the inside of the first frame body (4), and gas pipes (28) are fixedly mounted in the second mounting plates; the lower end of the air conveying pipe (28) is fixedly connected to the air heater (23); the air heating machine (23) is fixedly arranged on the inner lower surface of the third mounting frame (19), and the lower end of the air heating machine is provided with an air inlet net (24); the air inlet net (24) is fixedly embedded in the middle wall of the lower end of the third mounting frame (19).