JPS6010006A - Head assembly for floor surface cutting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention relates to a floor cutting device, and more particularly relates to the drive of the floor cutting device and several cutting blade support devices. U.S. Pat. No. 3,676,021 discloses a type of floor milling machine in which the apparatus of the present invention can be used.
IjN is shown. Such a cutting machine consists of a cutting machine supported by a head pivotably mounted on a frame.
I like the 11J blade. The first problem with cutting machines identified in the above-mentioned U.S. patent is that the drive pulley and drive belt are not impregnated, and therefore contaminant particles are trapped therein, resulting in the production of acid. -Pulleys and bells) If enclosed, it is difficult to get close to them -6: Vibrating part fa0: It is difficult and time consuming to remove; Connecting rond for head drive It is difficult to rapidly vibrate the related parts and the bearings: There is insufficient oil supply to the rods and the related parts and the bearings, and a vibrating head is required on the pivot shaft. the unreasonably high expense of repairing and replacing such parts; and the difficulty of attaching a cutting edge to the bottom side of the head. The main object of the present invention is to provide a solution to the above-mentioned problems and disadvantages. The present invention is basically embodied as follows. a frame lacking side members; a drive supported by the frame; wheels supporting the frame; a handle guiding the frame; and a cutting blade supported by a head pivotally mounted to the frame. , a head assembly used in a power-driven pressure surface cutting device. first and second tubular portions having spaced apart and parallel axes (7, a connecting element in which said second tubular portion is pivotally connected to a head; a drive shaft extending and adapted to rotate and operatively connected to the drive; a support bearing removably mounted on the face member of the frame; said drive shaft having a bearing; The frame has both ends rotatably supported by the frame.
The foot has an opening through which the shaft extends and the opening is circumferentially open so that the drive shaft is removed from the frame through the opening when the bearing is removed from the side member.

[7]
This allows the drive shaft and the first tubular portion to be removed from the frame. The drive section includes a motor having a drive shaft, and a drive shaft and a low gear provided on the drive shaft. an endless drive mounted on said rotor; ) a protective head assembly including a removable panel for permitting access to the rotor and drive member for adjustment or repair; As is clear, the rotor can have a pulley and drive shaft that are removable from the drive, and the endless drive member can include a V-belt; the shroud can be removable and provide a connection to the pulley and V-belt. An eccentric device on the drive shaft can have two axially spaced eccentrics trapping lubricating oil between them, and a counterbalance on the shaft can be fitted with a panel or cap that allows access. is supported in a position with two eccentric parts extending between them.
The wafer hYa may include two axially spaced waes hYa. The eccentric and the weight can be removed together with the drive shaft. The head vibrating eccentric rotated by the drive shaft may have opposed 17 end faces extending radially outwardly and axially to guide lubricating oil in a g1 manner relative to the pivoting portion. The tubular part can also be formed from pipe sections connected to each other by plates'. Further, the cutting blade can be easily attached to the side of the head by a fixing device which will be described later. These diagonals can be quickly removed from the frame. The weight is disposed between the frame member, i.e., the wall, and the pivot portion, and projects perpendicularly to the axis of the shaft to an extent greater than the eccentricity fls. An example will be described. Referring first to FIGS. 1 and 2, a cutting machine incorporating the apparatus of the present invention is shown in its entirety by the number 10. are a pair of rubber tires 12 which allow the cutting machine 12 to be easily transported and maneuvered.
] 14. An electric motor 18 is mounted on the frame 16. It is also possible to drive the cut 11 machine 10 by an internal combustion engine. Motor 18 is held in place by four eleven-stroke bolts 19 extending through slots 20 in frame 16. When the bolt 19 is loosened, the shape of the slot 20 allows the motor to be moved back and forth on the frame 16, thus adjusting the tension of the drive belt 21. Covering the motor 18 and attached to the frame 16 is a cover shroud 22. The shroud 22 slides over the side walls 23 of the frame (and is held in place by bolts 24 as shown in FIG. 1). Mounted forward of the frame 16 is a nose weight 25. The weight 25 is held in place by a suitable wire clip 26 securing the front edge of the shroud 22 to the weight 25. The weight provides the necessary load to the cutting edge 28, as will be described below. 30, and the upper end of the tubular member 60 is joined by the tubular transverse member rollers 1 and 32. The grip rollers are used for handling and manipulating the cutting machine 10. 3-5 show the cutting head subassembly 36 in detail.
and a pair of vertical flanges 35 to form a substantially U-shape, which is best shown in FIG. A cutting head groove 8 is provided between seven lamps 350 at the t+iJ end of the frame 16. The head groove 8 is provided with a web 4° and a pair of flanges 42. The cutting head is provided with a pin 44 passing through both pairs of flange filters 5 and the flange 42, and a cutting head 41i thereunder.
11 end pivotably relative to the frame 16. The one shown in FIGS. 4 and 6 is one that passes through a pair of flanges 35 and is received therein.
Rotatably mounted drive shaft 4 shown in the figure
At 6! bro. The shaft 46 is attached to the frame flange 5 by bolts 50.
Its outer ends are received in a pair of roller bearings 48 bolted into the bearings. The camshaft is attached to the bearing 48 by a locking sleeve 52 which is mounted on the shaft just outside the bearing 48. Shaft 460] Keyed to one end is a sheave 54 adapted to support V-pel I4'. A sheave 58 similar to sheave 54 is provided on the shaft 56 of the motor 18, and these sheaves 54 and 58 are provided on the same plane of rotation. The sheaves 54 and 5B are connected by a V-belt 21 made of rubber. ■Bell) 210) Tension can be adjusted by the method described above. The shaft 46 extends within a first tubular section 90 of the coupling element g91, and the coupling element 91 also has a second tubular section 92 having a smaller diameter than the first tubular section 90. These tubular sections are conveniently and inexpensively formed from steel tube members connected by steel plates 9, not shown at 94 and 95, which are in quick contact with the outer sides, as shown in FIG. be able to. The cost of element 91 is therefore minimized. The shaft 46 supports two axially spaced eccentrics 96 and 97. With reference to FIG. 7, the axis 96a of the eccentric portion 96 is
You can see that it is separated from a. The eccentric part of the valley is code 98
and 99 are cylindrical to rotate in bearings such as bushings and are housed in counterbore holes 98 and 998 in the pipe section. /11 f'1ls981] and 99
b are facing each other. The large space 100 thus formed between the bias and b portions provides an oil space for lubricating oil or grease. As described below, rotation of the shaft provides permanent oiling to the bearing portion of the eccentric which vibrates the shaft portion 90 and wobbles the element 91 back and forth. Shaft part 46
b extends between the two eccentric parts and connects them. The two eccentric parts are opposite ends ゎUβ: f4 and 96
A and 97aYW, and since these ends have an 11 centimeter spread, it should be noted that when the eccentric L part rotates, it acts to push away grease or oil. . As a result, the grease is pressed radially outwardly and in the 1++b-Jj direction with respect to the bushing, thereby promoting oil supply to the biased portion Ib and the bushing receiving surface. The ends 96a and 97a extend outward from the eccentric portion by 9
It should be noted that .l4Il of the shaft is crossed at an angle α smaller than 0°. Grease is introduced into the space 100 through a grease joint 101 provided on the shaft portion 90. At both ends of the bearing are annular elastomeric seals 102 and 10, which are pressed into counterbore holes 102a and 10a of the shaft. A pipe portion 92 is connected to the other end of the element 91 via a bushing 66.
A bearing shaft 68 is provided. Attach the shaft 68 to the cutting blade 8 2
I'm here. As shaft 56 rotates, element 91 vibrates back and forth, causing head filter B to move back and forth with respect to the axis of tube 44 in the direction shown by arrow A in FIG. At the lowermost portion of the cutting head 58, the flange 42 widens and accommodates a cutting blade stand 70'Y. The stand 70 is adjustably held relative to the cutting head by a pair of bolts 72 and 74. The bolt 72 is the cutting blade base 7.
Both ends of the connecting iron shaft 58 are screwed through an opening 75 provided at the rear of the connecting shaft 58. bolt 74
has an open core 6 and is screwed into the end of the shaft 77. The purpose of the cutting blade rest 70 is to securely hold the cutting blade 78 in the cutting position 1. A pair of adjustable rho bolts 80 and a series 1F nut 81 are provided on the rear edge of the table 7o, and these allow adjustment of the position of a cutting blade stop 82 that adjusts the protruding wall of the cutting blade. The front edge 83 of the cutting blade base 70 has a tapered shape and has a LuJ cutting blade V pair (2) to provide strong rigidity.
The scale and cutting edge 78 has a shallow angle of 8'1 between the floor surface to be cut. Figures 8, 10, L and 11 are aluminum Uno, and (,1,
The alloy plate is a modified cutting head 13 made of a light metal such as magnesium or its alloy.
8 is shown. The head is connected to the web 140 by two interconnected elongated flanges 142Y! are doing. These flanges have two partially thickened ears 242 near the upper end of the flange. The ear 242 is the bearing opening 1 for the pivot shaft 144.
It has 50. The pivot shaft 144 is attached to the flange 3 in FIG.
It is connected to the frame flange 1 corresponding to 5. The bearing opening (or ear) has a length e of 19 mm or more. Preferably, the length l is between 19 WIm and 8 lines. As a result, wear of the head metal surrounding the opening 150 is prevented, especially when the cutting force is excessive. The apertures are sized to closely accommodate the pivot axis 144 and define a common axis 144a. FIG. 11a shows another variant, having a steel tube '544 received in the opening 150 and in turn housing the shaft 144. The steel pipe filter 44 distributes the load to prevent wear of the lightweight metal ear portion 242. 8 and 9 show a deformed cutting blade retaining plate 170 attached to the bottom 11!11 portion 1 8a of the cutting head 138. The cutting blade 178 is held between the bottom side of the head by a holding plate. two 1ill1177
and 168 extend parallel to the web 140 and pass through the flange 142 to form axial projections 177a and 168a on the outer side of each flange. ing. Both pairs of fixing members 200 and 201 extend parallel to each other through appropriate openings provided in the holding plate and the blade at the ends of the respective shafts. The fixed part is head 2
00a and 201a, respectively, which clamp the split washers 202 and 2o to the bottom of the holding plate. Fixing part assembly f: Screw + lll 2
00 +3 and 201b, which threaded shafts have threaded openings 177b in shaft projections 177a and 168a.
and screwed into 168b 4). (2) Therefore, the appropriate position 1u of the cutting blade can be determined using only one hand 210, as shown in FIG. That is, the wrench 204 containing the head of the fixing member is operated [
7, the cutting blade can be adjusted with the other hand 211. The operation of the cutting machine 10 varies depending on the floor surface to be cut. The larger the angle between the cutting blade 78 and the floor surface, the deeper the cutting blade cuts into the floor surface. This angle can be changed by lifting the wheels 12 off the floor. This angle can also be changed by extending the cutting blade 787 beyond the edge of the platform 70. When cutting plywood or particle board floors, it has been found to be very useful to use extra long cutting blades that extend 70 to 100 inches or more. The cutting blade 78 is the base 7
The longer the blade extends, the smaller the angle between the cutting blade and the floor surface becomes. The amount of weight 28 (load) applied to the cutting blade also varies depending on the floor surface to be cut. The weight can also be changed by the hand force applied to the handle bar 29. Generally speaking, the best operation of the cutting machine can be obtained by raising the wheel handle 29 until the wheel is approximately 12 mm from the floor. When cutting a particularly hard floor surface, it is very effective to use a cutting blade with a beveled surface. FIG. 12 is a cross-sectional view of a device similar to FIG. 10, with elements designated by the same reference numerals. The device shown in Figure 10 is the ear part 2.
42 holes 282 and 28 holes (, lever 11-
They differ in that they have bushings 280 and 281. The bushings can fit against the IF and shoulder portions 284 and 285 of the ears. The bushings are filled with metal sleeves 280b and 280b (for example, made by No. 1) and filled into the holes 282 and 28.
1+) is advantageously self-lubricated by the annular moons 1''+ 280a and 281a. One of the bushes is designated '141J as a JILITE bush. The pivot shaft 144 is typically steel and is housed within the J-shaped shafts 280a and 281a. Rubbing provides permanent and low-wear operation. FIG. 1'5 shows a device similar to that of FIG. 4 with the corresponding anolyte designated by the same reference numeral (indicated by -). This device is similar to that of FIG. A counterbalance device is provided on the drive shaft 46 to reduce the vibrations created by the eccentric that rotates therewith and vibrates the head and cutting blade. The device comprises two axially spaced weight filters 00 and 601 supported on the shaft 46 in a position between which the two eccentrics 96 and 97 extend.
contain. The weight filter OO is thus protected and confined by a shield filter OO provided on the outer side of the frame filter 5a and the shaft bearing 48a and attached to the frame 35a at 604. Also, the weight filter 01 is the frame filter 5b.
and the shaft bearing 481), and is protected and confined by the sheep 54. These weights can be attached to the shaft by means of keys or bottles (see bottle rack 05 shown in FIG. 15). In FIG. 15, the weight filters OOa and 301a are located at the inner sides of the frame member filters 5a and 651], and at the other end portions 96a and 97 of the frame member filter and the eccentric portion 96.
7a. Metal weights, typically made of steel, are similar in size and shape and feature a small thickness (typically 10 mm or less). Referring to FIG. 14, an eccentric portion represented by portion 97 is defined by the shaft 146a relative to 1. It protrudes in the direction perpendicular to (see arrow 1::lJ310). The weight is represented by the weight 500 (1
cJ, which is perpendicular to Jungai 46a, protrudes in the opposite direction (see giant arrow 311), that is, in the direction of silk 2). Furthermore, the weight has two eccentricities, and the protrusion range is larger than the A range in which the A part protrudes. 112). Weight 3
00(7)i core (shi is 4Fi of shaft and eccentric part)
It exists outside one area. The weight is glue 1 as shown]
<The outside is bell-shaped. The two weights are approximately equally spaced from two identical I1m centers for best balance. In accordance with an important aspect of the invention, and with further reference to FIGS. 17-19, the side member on the frame has an opening 1 (7) through which the ends of the drive shaft are inserted. These openings are circumferentially open to allow the shaft to pass through and release the end of the shaft from the frame when the bearing is disengaged from the side member of the frame. and the first tubular section 90 can be easily removed from the frame. Complete removal from the frame is further facilitated by the removal of the pivot 144 from the frame freeing the second tubular section 92. This is necessary This allows quick repair of the removed elements, including replacement of the belt 21 and bearings.It also eliminates the problem of how to remove the drive shaft from the frame 1-1, especially if the drive shaft is connected to the weight filter 00a and 01a with eccentricities s96 and 97 M
It's good when you're doing something. As shown in FIGS. 17 to 19, for example, the side wall or the flange groove 5a, the 1ll uir part of the open frame (O is open r] 540v 1] 7. This opening is
θ) extending through the wall or flange of L is desirable. These openings 1" are elongated downwards7. C is on (
FIG. 19) The periphery is outwardly open, such as the edge groove 41 of the flange or side wall. This shape is bearing 48
After removal from the side flange grooves 5a and 551) and by a rocking movement in two directions] about the axis 68 of the connecting element 91, the slide l1:) protrudes into the opening 540. Allow the ends of the opening to move downward and free through the opening. 111. Note that in FIG. 18, the 1st line 40 extends approximately t, relative to the circle around the 1ial line of 1ib68, off the IJ line to facilitate the above-mentioned removal. When the pivot shaft 44 is removed, the vibration V is completely removed from the frame. The above-described arrangement also allows the vibrating drum to be quickly reattached to the frame by recoupling the shaft 44 and bearing 48 to the side members of the frame. In Fig. 16, weight 3 [Jla set screw 5
70 is pressed against the flat plate 571 of the shaft 46 for more secure locking of the weight. Referring now to FIGS. 20 and 21, a protective shroud 400 is operatively connected to the frame. This connection is made at weld 401 for the cover shroud 22 attached to the frame T'L-4, and at weld 402 for the frame T'L-4. shroud 4
00 extends around sheaves 54 and 58 with drive belt 21 attached to the sheaves (elements 54, 58 and 21 generally represent the rotor and endless drive member). The shroud 400 is the upper sheave 58
19 to the lower sheave 54 and below the U-shaped opening '540 shown in FIG. However, the shroud can protect against external contaminants or dust approaching the sheave and belt. Access to the belts and sheaves for repairs or adjustments etc. can be easily achieved by removing panel 4, which is part of the shroud. Figure 21 shows 1
As shown, panel 4ooa has the shape of a cap,
Its edge is wrapped around the shroud side wall 411 at a point indicated by the numeral 410. Threaded fasteners 412 connect the camps to the aforementioned α) 111 walls and allow easy removal of the camps for access to the sheaves and belts. In the modified shroud shown in FIG.
1 is flattened 11, and a screw fixing device 412 is used to secure the outer periphery of the panel to the shroud.
It is connected to the inner flange of the flange. Note in FIG. 13 that the shroud 400 faces the seven-piece 54 and counterweight 501. 4. [r in the drawing? Fig. 1 is a side view showing the shallow part of the floor space incorporating the mounting of the present invention, and Fig. 2 is a plan view of the floor surface cutting 1 of Fig. 1.
Figure 6 is an enlarged l'J7111 that appears on the line of Figure 4.
Figure j and Figure 4 are cross-sectional views taken along line 4-4 in Figure 3. Figure 5 is a diagram of +1.1i located on line 5-5 in Figure 6, Figure 6 is a cross-sectional view of the connecting structure shown in Figure 4, and Figure 7 is a side view of the connecting structure in Figure 6. Figure 8 is a 111] side view. Figure 9 is a perspective view, Figure 10 is a front view showing the head section in Figure 8, Figure 11 is a plan view of section 11-11 in Figure 8, and Figure 11a is similar to Figure 11. The plan view, Fig. 12, is the same as Fig. 10, but the front view, Fig. 16, shows another modification.
The figures are Fig. 4 showing the use of a counterbalance weight, a sectional view of the same cap, Fig. 14 a side view of the drive shaft, eccentric part, and weight, and Fig. 15 showing the use of a counterbalance weight Fig. 6. A similar sectional view, FIG. 16 is a 1111 direction sectional view. 17 and 18 are front views and sectional views similar to FIGS. 2 and 6, respectively, showing other modified examples, and FIG. 19 is a 111 side view of the modified frame side wall. 20 is a side view similar to FIG. 1 showing another modification, FIG. 21 is a sectional view taken along line 21-21 in FIG.
FIG. 2 is a sectional view similar to FIG. 21 showing still another modification. 10...Floor surface UJfIJ installation +i￥ 12...
... Wheel 14 ... Axle 16 ...
・Basic frame 1B...Morph 21...
...Belt 22...Shroud 28...
・Cutting edge 29...Handle par 34.4
0... Web E) 5.42... Flange 46...
... Drive shaft 48 ... Bearing 54
．． 58... Sheave 56... For driving + 90.
92...Tubular part 91...Connecting element 9ro...
...Plate 98.99...Buso/Yu 100...
ψ interval 102a, 10roH, 102, 105...
・・・・・・Counterbore patent agent Balmer Grasse Patent attorney Kyozo Yuasa~゛□ ・ (4 others)

Claims (1)

[Scope of Claims] (1) A frame having a side member, a drive device supported by the frame, wheels supporting the frame Z, and a handle for guiding the frame, which are pivotally attached to the frame. A head assembly for use in an effect-driven floor cutting device that suspends a cutting blade supported by a two-piece head mounted thereon. a coupling element having first and second tubular portions spaced 1”L apart and having parallel axes 2, said second tubular portion being pivotally connected to a head; a drive shaft extending within the drive section and operatively connected to the drive section for rotation; and a support bearing removably attached to a side member of the frame. The shaft has both ends rotatably supported by bearing bearings. The side member of the frame has an opening 2 therein through which the shaft 7 extends, and the opening 2 has an opening 2 through which the bearing 11 extends.
111 When removed from the ui section side, Iji4 Ll'
f(, j+'+) is opened in the circumferential direction so that the drive shaft can be removed from the frame, thereby making it possible for the drive shaft and the first tubular part to be detachably attached to the plate. The drive section includes a motor having a drive shaft, a rotor provided on the drive shaft, and an endless drive member provided on the rotor. a protective shroud connected to and extending around the rotor and the drive part H, the protective shroud being connected to and extending around the rotor and the drive part H;
It includes a protective shroud 7 that includes removable panels to allow access to the moon and to adjust or control the operation. Head assembly with special features. (2. The henod assembly according to claim 1, comprising an eccentric device provided on the drive shaft and a bearing device 2 supported in the first tubular member by the eccentric device, the bearing device being supported by the eccentric device in the first tubular member. A head assembly containing the eccentric device that vibrates the first tubular portion, and wherein the head and the cutting blade are rotated together with the eccentric device by the drive shaft. (3) Patent 3. The head assembly of claim 2, wherein the rotor includes a sheave, the endless drive member includes a V-belt, and wherein the pulley is removably attached to a drive shaft and a drive shaft, respectively. (4) In the head assembly according to claim 2, the head assembly is provided on the drive shaft and rotates therewith]
2. A counterbalance device is provided to reduce the vibration generated by the vibration, and the eccentric device has two axially spaced eccentric parts, and a lubricating oil storage space is provided between the eccentric parts. and wherein the counterbalance device has two axially spaced weights supported on the drive shaft at a position between which the eccentric portion extends. Head assembly with % characteristics. (5)/12? The hem 1 assembly according to claim 2 is provided with a side wall opening of the frame and a side wall opening of the frame.
at least one counterbalance weight supported by the drive shaft in a spaced apart (21) relationship to a support bearing in momentary contact with the support bearing, and the shroud is in a protective relationship with the weight; (6) In the head assembly according to claim 4, the counterbalance weight is also provided between the "1" and the eccentric part, iiJ entry I] is U-shaped and the frame 111 is h+',
4A, and the shroud is provided in the above (1).
the eccentric portion extends downwardly from the letter-shaped opening, the eccentric portion protrudes in a direction perpendicular to the axis defined by the drive shaft, and the weight is on a side substantially opposite to the direction perpendicular to the drive shaft. The head assembly is characterized in that the weight protrudes in a second direction, and the weight protrudes over a wider range than the 111 octagonal part protrudes. (7) In the head assembly according to claim 6, the panel is defined by a shroud camp extending in a Kan 1 thread facing the pulley and the V belt, and the camp is connected to the Furio and V belts. against a shroud structure that extends around the belt.
- The head assembly according to claim 1, characterized in that the head assembly box (8) is locked with a fixing device. The head is formed from lightweight metal. It has 4 flanges connected to each other by webs and partially thickened to form two ears. forming a bearing opening for a pivot shaft received and supported in said ear and removably connected to said frame, and enclosing a bearing pusher adapted to be self-lubricating near said shaft; Head Ascender 1 (9) In the head assembly according to claim 8, C1 includes a cutting blade retaining plate attached to the head at a bottom side thereof, and parallel to the head web and at the head flange. two shafts extending through the shaft and providing a shaft protrusion outwardly of the flange, and a threaded portion passing through the retaining plate and screwing into engagement with the threaded opening 1 of the shaft projection. (-), and the fixing tool is provided under the retaining plate and rotated to tighten the cutting blade between the plate and the cutting blade. A head assembly according to claim 9, wherein the head assembly has a viewing part that can be rotated. A head assembly characterized in that a cutting blade 1j is sandwiched between the head assembly.(11) In the hend assembly according to claim 1, the first and second tubular parts A head assembly comprising pipe pieces having different outer diameters and an intermediate structure connected between the pipe pieces. The head assembly according to claim 11, wherein the intermediate structure includes a plate welded to the pipe piece. (13) The head assembly according to claim 4. In the assembly, the eccentric portion has mutually opposed end surfaces that diverge radially outwardly and axially away from the space, thereby providing a lubricant to a bearing device in the first tubular portion. (14) In the head assembly according to claim 13, the end face is defined by ml and Lg. The outer cylindrical surface formed by the shaft is traversed in a plane extending at an angle α of less than 90° to said axis, said shaft being 111
1. A head assembly characterized in that it supports a counterweight having an 11-pronged position.