Positioning and clamping mechanism for large flange back cleaning brush of radial drilling machine

Abstract

The application belongs to the technical field of axle housing processing, and particularly relates to a positioning and clamping mechanism for a large flange back cleaning brush for a radial drill. The mechanism comprises a support frame, the lower end of the support frame is provided with a rotating shaft, the rotating shaft is rotationally connected with a brush, the top of the rotating shaft is connected with a radial drill spindle, the rotating shaft drives the brush to rotate along the inside of a piper hole of the axle housing, the upper end of the support frame is provided with a moving frame, the moving frame is located above the brush, the moving frame is provided with a plurality of moving wheels which are arranged in parallel and at intervals, and the moving wheels move along the ring direction on the large flange surface of the axle housing. The mechanism solves the problems of difficult cleaning, incomplete cleaning, high labor intensity and high energy consumption of the large flange back of the axle housing, and the problems of instability during a large range movement of the radial drill when used as a power source, difficult control of precision, and inability to bear downward pulling force.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of axle housing processing, and particularly relates to a positioning and clamping mechanism of a large-flange back cleaning brush for a radial drill. BACKGROUND

[0002] The cleanliness of an axle housing is one of key factors affecting the quality of the axle housing product, especially the inner cavity of the axle housing, because the parts of the main reducer are in the inner cavity, and any impurities entering the surface of the inner cavity of the axle housing will have a considerable impact on high-precision parts such as gears and bearings, thereby causing after-sales claims. Therefore, all major manufacturers pay great attention to the cleaning of the axle housing, and the cleaning of the back of the large flange of the axle housing is particularly difficult, for which all major manufacturers have spent a lot of manpower and resources. The commonly used methods for cleaning the back of the large flange mainly include the following:

[0003] (1) manually cleaning the back of the large flange by using a hand-held tool such as an angle grinder or sandpaper

[0004] (2) installing a cleaning tool on a machining center to remove burrs by machining.

[0005] (3) removing impurities by adding a retractable reverse nozzle to a cleaning machine.

[0006] The disadvantages of the prior art are as follows:

[0007] (1) manually cleaning the back of the large flange by using a hand-held tool such as an angle grinder or sandpaper, which requires the operator to bend over to put the tool into the large flange hole (harp hole) and clean the back of the tool in the reverse direction, and the back cleaning operation is inconvenient and difficult to visually inspect, and the efficiency is low and the labor intensity of the workers is high:

[0008] (2) installing a rigid cleaning tool such as a machine polishing sheet or a grinding head on a machining center to remove burrs. This method needs to be programmed for different products, because machining by the machining center must be programmed before it can be executed, and the flexibility is poor, and it cannot cope with the height difference fluctuation of the cleaning surface, and there may be problems of overcutting or incomplete cleaning;

[0009] (3) removing impurities from the back of the large flange by adding a retractable reverse nozzle to a cleaning machine, which can improve the cleanliness, but requires a large investment, and needs to be used with a cleaning agent to obtain good oil stain cleaning ability, and a lot of consumables are consumed during use, but this method can only remove impurities adhering to the surface of the axle housing, and cannot remove burrs existing on the back of the inner cavity of the axle housing, such as burrs at the end of the large flange hole.

[0010] The radial drilling machine is the most widely used equipment in manufacturing industry due to its low price and simple operation, but there are few scenes of batch cleaning operation using the radial drilling machine at present, because the radial drilling machine is difficult to accurately control in a wide range of movement, and the radial drilling machine needs to be pushed by the operator to move on the swing arm during use, and cannot be accurately moved to the required position, and relies on arm strength and the operator's feeling, and the radial drilling machine cannot bear downward pulling force, so the radial drilling machine is basically not used for cleaning the outer surface and the inner surface of the workpiece. SUMMARY

[0011] The present application provides a large flange back cleaning brush positioning and clamping mechanism for a radial drilling machine, which solves the problems of difficult cleaning, incomplete cleaning, high labor intensity and high energy consumption of the large flange back of the bridge housing, and the problems of instability during wide range movement, difficulty in controlling precision, and inability to bear downward pulling force of the radial drilling machine.

[0012] The technical solution of the present application is as follows:

[0013] A large flange back cleaning brush positioning and clamping mechanism for a radial drilling machine, comprising a support frame, a rotating shaft is installed at the lower end of the support frame, a brush is rotationally connected to the rotating shaft, the top of the rotating shaft is connected to the main shaft of the radial drilling machine, the rotating shaft drives the brush to rotate along the inner side of the pipa hole of the bridge housing, a moving frame is installed at the upper end of the support frame, the moving frame is located above the brush, a plurality of moving wheels are installed on the moving frame in parallel and at intervals, and the moving wheels move along the large flange surface of the bridge housing in a ring direction.

[0014] Through the above technical solution, the moving wheels of the moving frame move along the large flange surface of the bridge housing, driving the support frame to move in a ring direction along the large flange surface of the bridge housing, and the support frame rotates by the rotating shaft driven by the radial drilling machine during movement, realizing self-rotation of the rotating shaft while moving in a ring direction, and the brush driven by the rotating shaft cleans the large flange back of the bridge housing, realizing fast cleaning of the large flange back of the bridge housing, and reducing labor intensity and energy consumption of manual cleaning.

[0015] Optionally, the rotating shaft is rotationally connected with a main anti-collision wheel, the main anti-collision wheel is located above the brush, two auxiliary anti-collision wheels are installed on the side surface of the support frame, the main anti-collision wheel is located between the two auxiliary anti-collision wheels, and the main anti-collision wheel and the auxiliary anti-collision wheels rotate along the inner side of the pipa hole of the bridge housing.

[0016] Through the technical scheme, the main anti-collision wheel and the two auxiliary anti-collision wheels are in relative sliding contact with the pipa hole of the axle housing, when the support frame moves to the gap on the inner side of the pipa hole of the axle housing, the main anti-collision wheel and the two auxiliary anti-collision wheels cooperate to form a three-point wheel axle structure, so that two wheels are always in contact with the inner side of the pipa hole of the axle housing, and the support frame avoids collision with the inner wall of the pipa hole of the axle housing during movement.

[0017] Optionally, the bottom of the lower end of the support frame is V-shaped, the lower end of the rotating shaft is rotatably connected to the bottom of the lower end of the support frame through a bearing A, and the rotating shaft is fixedly connected with a tray, and the tray is used for mounting the brush.

[0018] Through the technical scheme, the bottom of the lower end of the support frame is V-shaped, the bottom of the lower end of the support frame is V-shaped, which can improve the support force of the rotating shaft on the basis of reducing the space of the support frame, and the tray can be mounted and fixed to the brush. The rotating shaft enables the brush to have the ability to rotate, so that the brush can freely rotate in a ring shape, and the flexibility of the brush in cleaning the back surface of the large flange of the axle housing is improved.

[0019] Optionally, the number of the moving wheels is three, two adjusting bolts are vertically arranged on the top of the moving frame, the two adjusting bolts are respectively located between adjacent two moving wheels, the lower end of the adjusting bolt vertically penetrates the top of the support frame and the top of the moving frame from top to bottom, and the adjusting bolt is in threaded connection with the support frame and the moving frame.

[0020] Through the technical scheme, the number of the moving wheels is three, and considering that the large flange of the axle housing has a gap, when the moving frame moves to the gap of the large flange of the axle housing, two wheels can still be ensured to be in contact with the end surface of the pipa hole, so that the moving frame avoids the phenomenon of jamming during movement, and the stability of the moving frame during movement is improved. The adjusting bolt adjusts the height of the moving frame by rotating, so that the depth of the brush pressed against the back surface of the large flange of the axle housing is consistent, the worker needs to frequently adjust the height of the radial drill main shaft, so that the depth of the brush pressed against the back surface of the large flange of the axle housing is consistent, and the effect of cleaning the back surface of the large flange of the axle housing by the brush through rotation is realized.

[0021] Optionally, one side of the moving frame is fixedly connected with two door-shaped baffles, the two door-shaped baffles are respectively located between adjacent two moving wheels, the door-shaped baffles correspond to the adjusting bolts one by one, and the lower end of the adjusting bolt vertically penetrates the top of the support frame and the top of the door-shaped baffle from top to bottom.

[0022] Through the technical scheme, the door-shaped baffle can improve the strength of the moving frame, can separate the moving wheels, and can conveniently adjust the height of the brush in the support frame by the adjusting bolt.

[0023] Optionally, the lower ends of the left and right sides of the moving frame are respectively fixedly connected with limiting blocks, the limiting blocks are located below the moving wheels, and one side of the limiting block close to the moving wheel is arc-shaped.

[0024] Through the above technical scheme, the arc-shaped design of the limiting block enables the limiting block to clamp the outer circle of the pipa hole of the axle housing, limits the moving direction of the moving frame, enables the moving frame to drive the support frame to move along the ring direction of the large flange surface of the axle housing, improves the stability of the moving frame moving along the large flange surface of the axle housing, and avoids collision of the moving frame.

[0025] Optionally, the rotating shaft sleeve is provided with a sleeve, and the main anti-collision wheel is rotationally connected to the outside of the sleeve.

[0026] Through the above technical scheme, the sleeve is conducive to adjusting the installation height of the main anti-collision wheel and improving the stability of the installation of the main anti-collision wheel.

[0027] Optionally, the lower end bottom of the support frame is detachably connected with a bearing end cover through a screw A, the bearing end cover is located below the tray, the bearing end cover is fixedly connected with the bearing A inside, and the rotating shaft sleeve is fixedly connected with a limiting sleeve, and the limiting sleeve is located between the bearing end cover and the lower end bottom of the support frame.

[0028] Through the above technical scheme, the bearing end cover and the bearing A are fixedly connected, which can improve the firmness and stability of the rotation of the rotating shaft, and the limiting sleeve can change the installation height of the rotating shaft, which is convenient and flexible to install.

[0029] Optionally, the lower end bottom of the support frame is provided with a mounting hole A, the lower end bottom of the rotating shaft is provided with a mounting hole B, the lower end of the rotating shaft is inserted into the mounting hole A, a screw B is arranged in the mounting hole A, and the screw B is threadedly connected from bottom to top through the mounting hole A and the mounting hole B.

[0030] Through the above technical scheme, the support frame and the rotating shaft are connected in the vertical direction through the cooperation of the mounting hole A and the screw B, which ensures that the rotating shaft does not separate from the support frame in the vertical direction during the movement of the rotating shaft and the rotation of the rotating shaft.

[0031] After the above technical scheme is adopted, the beneficial effects of the present application are:

[0032] 1. The three movable wheels in this invention form a three-point wheel bridge structure, ensuring that even if the movable frame encounters a notch while moving on the large flange surface of the bridge housing, two wheels remain in contact with the large flange surface, preventing the movable frame from jamming during movement. The limiting blocks at both ends of the movable frame can lock the outer circumference of the pipa hole in the bridge housing, thus restricting the direction of movement and ensuring that the movable frame always moves circumferentially along the large flange of the bridge housing, effectively preventing the entire mechanism from colliding with the inner wall of the pipa hole in the bridge housing. The cooperation of the main anti-collision wheel and two auxiliary anti-collision wheels constitutes a three-point wheel bridge structure, ensuring that two wheels are always in contact with the inner side of the pipa hole in the bridge housing, preventing the entire mechanism from colliding with the inner wall of the pipa hole in the bridge housing during movement.

[0033] 2. The positioning and clamping mechanism in this invention enables reverse cleaning using a radial drilling machine. Workers only need to move the radial drilling machine spindle to complete the cleaning of the back of the axle housing, improving the efficiency of manual cleaning and solving the problem of difficult cleaning of the back side of large flanges. The positioning and clamping mechanism in this invention gives the radial drilling machine reverse processing capability, solving the problem of the tool holder easily detaching from the machine spindle when the radial drilling machine is subjected to downward pulling force, and solving the precision control problem during the large-range movement of the radial drilling machine. This provides a low-cost, high-efficiency cleaning method for the internal surface cleaning of axle housings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the entire mechanism in the embodiment;

[0036] Figure 2 This is a partial cross-sectional view of the entire mechanism in the embodiment;

[0037] Figure 3 This is a schematic diagram of the entire mechanism and its connection with the pipa-shaped hole in the bridge housing in the embodiment.

[0038] Figure 4 This is a schematic diagram of the support frame in the embodiment;

[0039] Figure 5 This is a schematic diagram of the structure of the mobile frame in the embodiment;

[0040] Figure 6 This is a schematic diagram of the structure of the tray and bearing end cap in the embodiment.

[0041] Explanation of reference signs: 1, support frame; 2, moving frame; 3, moving wheel; 4, limiting sleeve; 5, rotating shaft; 6, screw B; 7, sleeve; 8, main anti-collision wheel; 9, split pin; 10, adjusting bolt; 11, auxiliary anti-collision wheel; 12, brush; 13, tray; 14, bearing end cover; 15, door-shaped baffle; 16, limiting block; 17, screw A; 18, mounting hole A; 19, pukka hole; 20, pukka hole inner side notch; 21, large flange surface; 22, pukka hole outer circle; 23, radial drill spindle; 24, opening; 25, bearing A; 26, connecting shaft B; 27, nut B; 28, cross plate; 29, connecting shaft D; 30, nut D. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] The embodiments of the present application disclose a large-flange back surface cleaning brush positioning and clamping mechanism for radial drills.

[0044] EMBODIMENT

[0045] According to Figures 1 to 6 As shown in the figure, a large-flange back surface cleaning brush positioning and clamping mechanism for radial drills includes a support frame 1 and a moving frame 2.

[0046] The lower end bottom of the support frame 1 is V-shaped, and the lower end bottom of the support frame 1 is provided with a mounting hole A 18. A rotating shaft 5 is vertically inserted into the mounting hole A 18. The lower end bottom of the rotating shaft 5 is provided with a mounting hole B. The lower end of the rotating shaft 5 is inserted into the mounting hole A 18. A screw B 6 is arranged in the mounting hole A 18. The screw B 6 is screwed from bottom to top through the mounting hole A 18 and the mounting hole B. The lower end bottom of the support frame 1 is detachably connected with a bearing end cover 14 through a screw A 17. The bearing end cover 14 is fixedly connected with a bearing A 25 inside. The inner ring of the bearing A 25 is fixedly sleeved on the outer side of the rotating shaft 5. The rotating shaft 5 is fixedly sleeved with a limiting sleeve 4. The limiting sleeve 4 is located between the bearing end cover 14 and the lower end bottom of the support frame 1. The screw B 6 is a hexagonal head screw. The bearing A 25 is a double-row deep groove ball bearing A 25.

[0047] The rotating shaft 5 is sleeved with a tray 13 fixedly connected, the tray 13 is located above the bearing end cover 14, the tray 13 is used for installing the brush 12, the rotating shaft 5 drives the brush 12 to rotate along the inside of the piper hole 19 of the axle housing. The rotating shaft 5 is sleeved with a sleeve 7, the sleeve 7 is located above the brush 12, the outside of the sleeve 7 is sleeved with a main anti-collision wheel 8, two auxiliary anti-collision wheels 11 are installed on the side of the support frame 1, the main anti-collision wheel 8 is located between the two auxiliary anti-collision wheels 11, the main anti-collision wheel 8 and the auxiliary anti-collision wheel 11 rotate along the inside of the piper hole 19 of the axle housing. The size of the auxiliary anti-collision wheel 11 is smaller than the size of the main anti-collision wheel 8, the auxiliary anti-collision wheel 11 is tangent to the piper hole 19 of the axle housing.

[0048] The main anti-collision wheel 8 is a bearing C, the bearing C is sleeved and fixed on the outside of the sleeve 7. The left and right sides of the support frame 1 are fixedly connected with a horizontal plate 28, the auxiliary anti-collision wheel 11 is a bearing D, the bearing D is installed and fixed with the support frame 1 through a connecting shaft D29, the bearing D is sleeved and fixed on the lower end of the connecting shaft D29, the upper end of the connecting shaft D29 vertically penetrates through the horizontal plate 28 and is installed and fixed with the horizontal plate 28 through a nut D30.

[0049] The upper end of the support frame 1 is installed with a moving frame 2, the moving frame 2 is located above the brush 12, the moving frame 2 is installed with three moving wheels 3 which are parallel and spaced apart, the moving wheels 3 move on the large flange surface 21 of the axle housing in the ring direction. The lower ends of the left and right sides of the moving frame 2 are fixedly connected with limit blocks 16, the limit blocks 16 are located below the moving wheels 3, the side close to the moving wheels 3 of the limit blocks 16 is arc-shaped. One side of the moving frame 2 is fixedly connected with two door-shaped baffles 15, the two door-shaped baffles 15 are located between adjacent two moving wheels 3 respectively, the top of each door-shaped baffle 15 is vertically inserted with an adjusting bolt 10, the lower end of the adjusting bolt 10 vertically penetrates through the top of the support frame 1, the top of the door-shaped baffle 15 from top to bottom, the adjusting bolt 10 is threadedly connected with the support frame 1 and the door-shaped baffle 15 respectively. The lower end of the adjusting bolt 10 is inserted with a split pin 9. The lower end of the adjusting bolt 10 points to the large flange surface 21 of the axle housing.

[0050] The moving wheel 3 is a bearing B, the bearing B is installed and fixed with the moving frame 2 through a connecting shaft B26, the bearing B is sleeved and fixed on one end of the connecting shaft B26, the other end of the connecting shaft B26 penetrates through the moving frame 2 and is installed and fixed with the moving frame 2 through a nut B27.

[0051] The top of the rotating shaft 5 is provided with a tool holder connected with the main shaft 23 of the radial drill, and the rotating shaft 5 is driven to rotate by the radial drill, and the rotating shaft 5 drives the brush 12 to rotate at the same time, so that the brush 12 can clean the back surface of the large flange of the axle housing. The top of the support frame 1 is provided with arc-shaped notches on the left and right sides, and the top of the support frame 1 is provided with an opening 24 between the two adjusting bolts 10, which reserves space for the installation of the rotating shaft 5 and the radial drill, and the left and right ends of the opening 24 are arc-shaped. The adjusting bolts 10 are located at the two arc-shaped corners of the opening 24.

[0052] Working principle:

[0053] Place the brush 12 on the tray 13, and fix the brush 12 and the tray 13 by the inner hexagonal taper end set screw, and connect and fix the top of the rotating shaft 5 with the main shaft 23 of the radial drill. Move the brush 12 so that it contacts the position of the back surface of the large flange that needs to be cleaned. Adjust the adjusting bolt 10 to move the moving frame 2 up and down relative to the support frame 1 until the moving wheel 3 contacts the large flange surface 21 of the axle housing. Finally, start the radial drill and manually push the support frame 1 to rotate along the large flange surface 21 of the axle housing for one revolution. In this process, the radial drill drives the rotating shaft 5 to rotate, and the rotating shaft 5 drives the brush 12 to rotate along the large flange surface 21 of the axle housing for one revolution while rotating around the tray 13, so that the brush 12 can clean the back surface of the large flange of the axle housing along the large flange surface 21 of the axle housing.

[0054] When the support frame 1 is pushed to move along the labyrinth hole 19 of the axle housing, the main anti-collision wheel 8 and the auxiliary anti-collision wheel 11 roll along the inner side of the labyrinth hole 19 of the axle housing, improving the stability of the support frame 1 during movement. Even if the support frame 1 encounters a gap in the labyrinth hole 19 during rotation, it can still maintain stability during movement and avoid collision, thereby improving the stability of the rotating shaft 5 driving the brush 12 to rotate and move, and improving the cleaning efficiency of the brush 12. The design of the three moving wheels 3 is also to ensure that two moving wheels 3 can roll along the large flange surface 21 of the axle housing even if they encounter a gap in the labyrinth hole 19 of the axle housing during movement, avoiding the phenomenon of jamming of the moving frame 2 driving the support frame 1 during movement. The arc-shaped design of the limiting block 16 allows the limiting block 16 to block the outer circle 22 of the labyrinth hole of the axle housing, limiting the movement direction of the moving frame 2, so that the moving frame 2 can always move towards the inner side of the labyrinth hole 19 of the axle housing.

[0055] When the rotating shaft 5 drives the brush 12 to rotate to clean the back flange of the axle housing, the support frame 1 can move in the counterclockwise direction or in the clockwise direction, and the radial drill spindle 23 only needs to rotate in a single direction during the whole cleaning process, without the need to change the driving direction.

[0056] In the description of the present application, it is to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified and limited, it is to be understood that the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be mechanical connection or electrical connection, or the internal communication of two elements, or direct connection, or indirect connection through intermediate medium, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0057] The above is only the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning and clamping mechanism for a cleaning brush on the back of a large flange used in a radial drilling machine, characterized in that, The device includes a support frame, a rotating shaft mounted at the lower end of the support frame, a brush rotatably connected to the rotating shaft, and a top of the rotating shaft connected to the spindle of a radial drilling machine. The rotating shaft drives the brush to rotate along the inner side of the pipa hole of the bridge housing. A movable frame is mounted at the upper end of the support frame, located above the brush. The movable frame is equipped with several parallel and spaced movable wheels, which move circumferentially on the large flange surface of the bridge housing. The rotating shaft is rotatably connected to the main anti-collision wheel, which is located above the brush. Two auxiliary anti-collision wheels are installed on the side of the support frame, with the main anti-collision wheel located between the two auxiliary anti-collision wheels. Both the main anti-collision wheel and the auxiliary anti-collision wheels rotate along the inner side of the pipa hole of the bridge housing. The number of movable wheels is three. Two adjusting bolts are spaced apart on the top of the movable frame. The two adjusting bolts are located between two adjacent movable wheels. The lower end of the adjusting bolt passes vertically from top to bottom through the top of the support frame and the top of the movable frame. The adjusting bolt is threaded to the support frame and the movable frame respectively. The lower end of the adjusting bolt points to the large flange face of the axle housing. Limiting blocks are fixedly connected to the lower ends of the left and right sides of the movable frame, respectively. The limiting blocks are located below the movable wheels, and the side of the limiting block closest to the movable wheels is arc-shaped.

2. The positioning and clamping mechanism for a cleaning brush on the back of a large flange of a radial drilling machine according to claim 1, characterized in that, The lower end of the support frame is V-shaped, and the lower end of the rotating shaft is rotatably connected to the lower end of the support frame through bearing A. A tray is fixedly connected to the rotating shaft, and the tray is used to install the brush.

3. The positioning and clamping mechanism for the cleaning brush on the back of a large flange of a radial drilling machine according to claim 1, characterized in that, Two portal-shaped baffles are fixedly connected to one side of the movable frame. The two portal-shaped baffles are located between two adjacent movable wheels. The portal-shaped baffles correspond one-to-one with the adjusting bolts. The lower end of the adjusting bolts passes vertically from top to bottom through the top of the support frame and the top of the portal-shaped baffles.

4. The positioning and clamping mechanism for the cleaning brush on the back of a large flange of a radial drilling machine according to claim 1, characterized in that, The rotating shaft is fitted with a sleeve, and the main anti-collision wheel is rotatably connected to the outside of the sleeve.

5. The positioning and clamping mechanism for a cleaning brush on the back of a large flange of a radial drilling machine according to claim 2, characterized in that, The lower end of the support frame is detachably connected to a bearing end cap by screw A. The bearing end cap is located below the tray. The bearing A is fixedly connected inside the bearing end cap. The rotating shaft is fitted with a fixed limiting sleeve, which is located between the bearing end cap and the lower end of the support frame.

6. The positioning and clamping mechanism for a cleaning brush on the back of a large flange of a radial drilling machine according to claim 2, characterized in that, The lower end of the support frame has a mounting hole A, and the lower end of the rotating shaft has a mounting hole B. The lower end of the rotating shaft is inserted into the mounting hole A. A screw B is provided in the mounting hole A, and the screw B passes through the mounting hole A from bottom to top and is threaded into the mounting hole B.

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