EP3072655A1 - Guide carriage for a wall saw - Google Patents

Abstract

A wall saw carriage (50) comprising a saw head and a motor feed unit with a guide carriage and a feed motor, comprising a base frame (51) having a support frame (55) and a receiving plate (56), a guide frame (52) having a Handle (58) and a chassis (53) having a first axis (64), a second axis (66) and at least three wheels (65, 67). At least one wheel (65) of the chassis (53) by means of a connecting device force and torque transmitting with a gear (45) of the guide carriage (26) formed connectable.

Description

Technical area

The present invention relates to a guide carriage for a wall saw according to the preamble of claim 1.

State of the art

For the treatment of hard surfaces, rail-guided wall saw systems are known which comprise a wall saw and a guide rail. The guide rail is fastened directly or via rail feet to the substrate to be worked, whereby walls, ceilings and floors can be processed. The wall saw consists of a saw head with an adjustable saw arm on which a saw blade is mounted and driven about a rotation axis, and a motor feed unit with a guide carriage and a feed motor. The wall saw is placed with the guide carriage on the guide rail. The guide carriage has a gear, which is connected to the feed motor and torque-transmitting, and a plurality of guide elements; the guide rail has a rack and a plurality of guide surfaces, wherein the geometry of the guide surfaces is adapted to the geometry of the guide elements. When the wall saw is arranged on the guide rail, the gear of the guide carriage engages in the rack of the guide rail and the guide carriage is moved by the feed motor along the guide rail. About the guide elements, which are guided along the guide surfaces of the guide rail, there is a linear guide of the wall saw. The guide elements can be designed as roller elements or as sliding elements.

The well-known wall saw systems of wall saw and guide rail have the disadvantage that the guide rail must be secured to the ground. For this purpose, boreholes must be created and fixing anchors inserted into the boreholes. After working the soil, the anchors must if necessary. Removed from the holes and the holes are closed. For machining tasks with long kerfs required attaching the guide rail to the floor and then closing the holes takes a great deal of time for preparatory and follow-up activities.

In addition to the well-known wall saw systems, which are suitable for the processing of walls, ceilings and floors, floor saws are known, which are intended for the processing of soils. Saws are saws that are not guided on a guide rail but are moved over a carriage with at least three wheels. Smaller floor saws often have manual lowering and feed devices, with larger floor saws the lowering and feed devices are controlled by a motor. The disadvantage is that the floor saws are suitable for the processing of soils and for the processing of walls and ceilings another saw is required.

The device manufacturer Diamond Products offers a guide carriage for its rail-guided wall saw model CC1600, which turns the wall saw into a floor saw. The guide carriage consists of a base frame with a receiving plate on which the wall saw is placed and secured, a guide frame with a handle and a chassis, which is arranged on the underside of the base frame. The chassis comprises a, designed as a front axle, first axle with two front wheels and, designed as a rear axle, second axle with two rear wheels. The disadvantage is that the carriage with the wall saw must be moved by the operator on the ground to be machined in the feed movement without motor support.

Presentation of the invention

The object of the present invention is to develop a carriage for a wall saw, which provides a small amount of equipment a motor support for the operator in the feed motion.

This object is achieved in the aforementioned guide carriage for a wall saw according to the invention by the features of the independent claim 1. Advantageous developments are specified in the dependent claims.

According to the invention the guide carriage is characterized in that at least one wheel of the chassis by means of a connecting device force and torque transmitting formed with the gear of the guide carriage connectable. A connecting device which connects a wheel of the chassis force and torque transmitting with the gear of the guide carriage, has the advantage that the feed motor can be used as a drive motor for the carriage. The motor support of the operator during the advancing movement of the carriage can be achieved with little equipment Realize effort because the feed motor is present in a wall saw and can be omitted an additional drive motor for the carriage.

In a preferred embodiment, the connecting device has at least one toothed wheel, which is connectable to the toothed wheel of the guide carriage in a force-transmitting and torque-transmitting manner. A trained as a gear transmission connection between the wall saw and the carriage can be easily realized. The wall saw is placed on the receiving plate of the carriage and locked on the receiving plate. In the locked state, the gear of the guide carriage engages in the gear of the connecting device and closes the force and torque transmission from the guide carriage on the carriage.

Particularly preferably, the connecting device has a first gear and a second gear, wherein the first or second gear with the gear of the guide carriage force and is transmitted to transmit torque. In rail-guided wall saws, the saw blade is attached to an adjustable saw arm and offset from a median plane of the saw head. In order to create edge cuts on opposite sides of the floor, it is necessary to place the wall saw in two different arrangements on the carriage, which are referred to as left and right arrangement. In the left-hand arrangement of the wall saw, the saw arm with the saw blade is arranged on the left-hand side of the guide carriage, wherein the side of the guide carriage which faces the guide frame on the left hand of the operator is defined as the left side. Accordingly, the right arrangement of the wall saw is the arrangement in which the saw arm is arranged on the right side of the guide carriage. A coupling device with two gears makes it possible for the wall saw in the left and right arrangement to be connectable to the guide carriage. In this case, the first gear of the connecting device in the left or right arrangement of the wall saw with the gear of the guide carriage is engaged and the second gear of the connecting device is in the opposite arrangement, i. the right or left arrangement, with the gear of the guide carriage in engagement.

In a further development, a transmission device is provided, which is arranged between the first or second toothed wheel of the connecting device and the first axle and / or the second axle in a force-transmitting and torque-transmitting manner. The transmission device connects the toothed wheel of the connecting device, which is in engagement with the gear of the guide carriage, in a force-transmitting and torque-transmitting manner with the drive axle of the guide carriage. Since the creation of Sägeschlitzen often cooling water is required and very much dust and dirt accumulates, a chain transmission is suitable as a transmission device. Chain gears are due to the open chain links for dirty machining conditions more suitable than, for example, belt transmissions with a closed belt. In a belt, the dirt can settle, whereas dirt in the open chain links of a chain harder to set and can fall through the chain links.

Particularly preferably, a coupling device is provided which is adjustable between a coupled state and a disengaged state, wherein the gear of the connecting device in the engaged state force and torque transmitting connected to the at least one wheel and in the disengaged state, the force and torque transmission from the gear Connecting device is interrupted for at least one wheel. For rail-mounted wall saws, the gearbox for the feed motor is self-locking for safety reasons. If the wall saw is mounted on a wall, it must be ensured that the wall saw does not make an uncontrolled feed movement in the event of a power interruption. The self-locking gearbox for the feed motor means that the guide carriage can only be moved with the wall saw mounted when power is supplied. A coupling device, which interrupts the transmission of force and torque to the drive axle, allows the guide carriage can be moved with mounted wall saw without power.

Particularly preferably, the coupling device is adjustable via a foot switch between the engaged state and the disengaged state. The design of the actuating element for the coupling device as a foot switch has the advantage that the operator can operate the coupling device when both hands engage around the handle of the guide frame.

In a preferred embodiment, the receiving plate has at least one holding element, which can be brought into engagement with at least one guide element of the guide carriage. The guide elements of the guide carriage interact with a rail-guided wall saw system with the guide surfaces of the guide rail and are part of the linear guide. Via a holding element which can be brought into engagement with at least one guide element of the guide carriage, the linear guide (sliding movement or rolling movement) is prevented and the guide carriage is held in an intended position on the receiving plate.

Particularly preferably, the receiving plate on a plurality of holding elements, which can be brought into engagement with the guide elements of the guide carriage. In this case, the holding elements are arranged diagonally opposite each other, so that the wall saw is held both in the left arrangement and in the right arrangement on the carriage. In a particularly preferred embodiment is for each guide element of the guide carriage a holding element provided on the receiving plate. The position of the guide carriage on the receiving plate is also very stable in the sawing operation, when each guide element can be brought into engagement with a suitable holding element.

In a preferred embodiment, at least one balance weight is provided on the carriage, which is fastened to the support frame. The balance weight consists of one or more weight elements which can be mounted and dismounted on the support frame; the balance weight is attachable to a socket pin or other suitable fastener that can accommodate one or more weight elements. The weight distribution of the wall saw on the carriage influences the sawing operation. In order to achieve a uniform progress of the saw blade, the drive wheels must have good traction and the saw blade must be kept in the ground. A balance weight, which is arranged in the region of the drive axle, improves the traction of the drive axle. When the drive axle is loaded with a balance weight, the drive wheels have good contact with the ground and slippage of the drive wheels is avoided.

Particularly preferably, a first balance weight and a second balance weight are provided on the guide carriage, wherein the first balance weight in the region of the first axis and the second balance weight in the region of the second axis are arranged. To maneuver a carriage with a wall saw, the carriage is tilted by the operator on the guide frame and moved on two wheels. The maneuverability of the carriage is influenced by the weight distribution of the wall saw on the carriage. The weight distribution of the wall saw changes in a saw head with a pivotable saw arm with the tilt angle and the pivoting direction of the saw arm. In addition, the arrangement of the wall saw on the carriage influences the weight distribution; The right-hand arrangement of the wall saw may have a different weight distribution than the left-hand arrangement of the wall saw. In order to change the weight distribution, several balance weights are provided on the carriage. The first balance weight is provided in the region of the first axis and the second balance weight is provided in the region of the second axis.

Particularly preferably, at least one first locking pin and at least one second locking pin are provided on the support frame, wherein the first balance weight on the first locking pin and the second balance weight on the second locking pin can be fastened. The pins allow for easy assembly and disassembly of weight elements, so that the balance weights can be adapted to the weight distribution of the wall saw on the carriage and the task. The first balance weight consists of one or more weight elements, which are attached to the first pin be, and the second balance weight consists of one or more weight elements, which are plugged onto the second locking pin. The weight elements may have the same mass and different balance weights are realized on the number of weight elements or weight elements are used with different masses. The carriage comprises a set of several weight elements of different mass.

In a preferred embodiment, two wheels of the chassis, which are arranged on a common drive shaft of the first or second axis, connected to the gear and the guide carriage so as to be connectable in terms of force and torque, wherein a wheel can be decoupled from the drive shaft. If both drive wheels are coupled to the drive shaft, the maneuverability of the guide carriage is limited without motor feed movement. The decoupling of a drive wheel from the drive shaft causes the two drive wheels can roll independently on the ground and steering movements are facilitated with the carriage for the operator.

Particularly preferably, the wheel which can be decoupled from the drive shaft is decoupled from the drive shaft in the disengaged state of the clutch device. The coupling device is required to interrupt the transmission of power and torque to the drive axle if the guide carriage is to be moved without a power supply when the wall saw is mounted. Since the decoupling of the two drive wheels is required when the carriage is moved without motor assistance, the combination of decoupling the drive wheel from the drive shaft and disengaging the clutch device offers. The combination of the equipment can be reduced and the ease of use for the operator can be increased. The operator only has to actuate the actuating element of the coupling device.

embodiments

Embodiments of the invention are described below with reference to the drawing. This is not necessarily to scale the embodiments, but the drawing, where appropriate for explanation, executed in a schematic and / or slightly distorted form. With regard to additions to the teachings directly recognizable from the drawing reference is made to the relevant prior art. It should be noted that various modifications and changes may be made in the form and detail of an embodiment without departing from the general idea of the invention. The disclosed in the description, the drawings and the claims features of the invention may be essential both individually and in any combination for the development of the invention. In addition fall in the Within the scope of the invention, all combinations of at least two of the features disclosed in the description, the drawing and / or the claims. The general idea of the invention is not limited to the exact form or detail of the preferred embodiment shown and described below or limited to an article that would be limited in comparison with the subject matter claimed in the claims. For given design ranges, values lying within the specified limits should also be disclosed as limit values and be arbitrarily usable and claimable. For simplicity, the same reference numerals are used below for identical or similar parts or parts with identical or similar function.

FIGN. 1A, B

ein bekanntes Wandsägesystem mit einer Führungsschiene und einer Wandsäge bestehend aus einem Sägekopf und einer motorischen Vorschubeinheit (FIG. 1A), wobei die Wandsäge mittels eines Führungsschlittens entlang der Führungsschiene verfahrbar ist (FIG. 1 B);

FIGN. 2A, B

einen erfindungsgemäßen Führungswagen bestehend aus einem Grundgestell, einem Führungsgestell und einem Fahrgestell im ausgeklappten Zustand (FIG. 2A) und mit einer auf dem Führungswagen angeordneten Wandsäge (FIG. 2B);

FIG. 3

den erfindungsgemäßen Führungswagen der FIG. 2A im zusammengeklappten Zustand in einer dreidimensionalen Ansicht;

FIGN. 4A, B

das Grundgestell des erfindungsgemäßen Führungswagens der FIG. 2A in einer Ansicht von oben (FIG. 4A) und in einer Ansicht von unten auf das Fahrgestell des Führungswagens mit einer Kupplungseinrichtung (FIG. 4B);

FIGN. 5A, B

das Fahrgestell (FIG. 5A) und die angetriebene Hinterachse (FIG. 5B) des erfindungsgemäßen Führungswagens der FIG. 2A mit der Kupplungseinrichtung im eingekuppelten Zustand;

FIGN. 6A, B

das Fahrgestell (FIG. 6A) und die angetriebene Hinterachse (FIG. 6B) des erfindungsgemäßen Führungswagens der FIG. 2A mit der Kupplungseinrichtung im ausgekuppelten Zustand;

FIGN. 7A, B

die Wandsäge der FIG. 2B, die mit dem erfindungsgemäßen Führungswagen der FIG. 2A als Bodensäge ausgebildet ist (FIG. 7A) und die mit einer Führungsschiene ein Wandsägesystem bildet (FIG. 7B); und

FIGN. 8A, B

eine alternative Ausführung einer Antriebsachse mit einer Kupplungseinrichtung im eingekuppelten Zustand (FIG. 8A) und im ausgekuppelten Zustand (FIG. 8B).

Show it:

FIGS. 1A, B

a known wall sawing system with a guide rail and a wall saw consisting of a saw head and a motor feed unit ( FIG. 1A ), wherein the wall saw by means of a guide carriage along the guide rail is movable ( FIG. 1 B) ;

FIGS. 2A, B

a guide carriage according to the invention consisting of a base frame, a guide frame and a chassis in the unfolded state ( FIG. 2A ) and with a wall saw arranged on the carriage ( FIG. 2 B );

FIG. 3

the guide carriage of the invention FIG. 2A in the folded state in a three-dimensional view;

FIGS. 4A, B

the base frame of the guide carriage according to the invention FIG. 2A in a view from above ( FIG. 4A ) and in a view from below of the chassis of the carriage with a coupling device ( FIG. 4B );

FIGS. 5A, B

the chassis ( FIG. 5A ) and the driven rear axle ( FIG. 5B ) of the guide carriage according to the invention FIG. 2A with the coupling device in the engaged state;

FIGS. 6A, B

the chassis ( FIG. 6A ) and the driven rear axle ( FIG. 6B ) of the guide carriage according to the invention FIG. 2A with the coupling device in the disengaged state;

FIGS. 7A, B

the wall saw of FIG. 2 B , with the carriage according to the invention of FIG. 2A designed as a floor saw ( FIG. 7A ) and which forms a wall saw system with a guide rail ( FIG. 7B ); and

FIGS. 8A, B

an alternative embodiment of a drive axle with a coupling device in the engaged state ( FIG. 8A ) and in the disengaged state ( FIG. 8B ).

FIG. 1A shows a known wall saw system 10 with a guide rail 11, a, on the guide rail 11 slidably mounted, wall saw 12 and a remote control 13. The wall saw 12 comprises a processing unit 14 and a motor feed unit 15. The processing unit is designed as a saw head 14 and includes a saw blade 16, which is attached to a saw arm 17 and is driven by a drive motor 18 about a rotation axis 19 . To protect the operator, the saw blade 16 is surrounded by a blade guard 21 which is secured by means of a blade protection holder on the saw arm 17.

The saw arm 17 is formed by a pivot motor 22 about a pivot axis 23 pivotally. The pivoting angle of the saw arm 17 determines, with a saw blade diameter of the saw blade 16, how deep the saw blade 16 dips into a workpiece 24 to be machined. The drive motor 18 and the pivot motor 22 are arranged in a device housing 25 . As an alternative to the pivoting movement of the saw arm 17 about the pivot axis 23 of the saw arm 17 can be adjusted, for example by means of a linear drive or other drive means.

The motor-driven feed unit 15 comprises a guide carriage 26 and a feed motor 27, which is likewise arranged in the device housing 25 in the exemplary embodiment. The saw head 14 is mounted on the guide carriage 26 and formed on the feed motor 27 along the guide rail 11 in a feed direction 28 slidably. In the device housing 25, a control unit 29 for controlling the saw head 14 and the motor feed unit 15 is arranged in addition to the motors 19, 22, 27. The guide carriage 26 and the saw head 14 may be formed in one piece or the guide carriage 26 is formed as a separate component to which the saw head 14 is attached.

The remote control 13 comprises a device housing 31, an input device 32, a display device 33 and a control unit 34, which is arranged in the interior of the device housing 31. The control unit 34 converts the inputs of the input device 32 into control commands and data, which are transmitted to the wall saw 12 via a first communication link. The first communication connection is designed as a wireless and wireless communication connection 35 or as a communication cable 36 . The wireless and wireless communication link 35 may be in the form of a wireless, infrared, Bluetooth, WLAN or Wi-Fi connection.

FIG. 1 B shows the structure of the guide carriage 26 and the connection between the guide carriage 26 and the guide rail 11. The guide carriage 26 is formed as a separate component; the saw head 14 is inserted into guides 41 and fastened to the guide carriage 26. The guide rail 11 is formed as a hollow profile and has a rack 42 and two guide surfaces 43.1, 43.2 . The term "rack" summarizes all rod-shaped elements with a tooth profile; a rack forms a rack gear with a gear.

The guide carriage 26 comprises a main body 44, a gear 45 and four guide elements 46.1, 46.2, 47.1, 47.2. The gear is designed as a spur gear 45 and mounted on an axle 48 . When a wall saw is fixed to the guide rail 11, the gear 45 of the guide carriage 26 engages the rack 42 of the guide rail 11 and the rotational movement of the feed motor 27 is converted via the rack gear 45 and rack 42 in a translational movement along the guide rail 11. The guide elements are formed in the exemplary embodiment as guide rollers 46.1, 46.2, 47.1, 47.2, which perform a rolling movement along the guide surfaces 43.1, 43.2. The guide rollers 46.1, 46.2 are designed as fixed guide rollers and the guide rollers 47.1, 47.2 as pivotable guide rollers.

FIGS. 2A , B show a guide carriage according to the invention 50 consisting of a base frame 51, a guide frame 52 and a chassis 53. It show FIG. 2A the carriage 50 in the unfolded state and FIG. 2 B the guide carriage 50 with a mounted on the carriage 50 wall saw 54. The wall saw 54 corresponds in construction of in FIG. 1A shown wall saw 12 with the saw head 14 and the motor feed unit 15th

The base frame 51 is formed as a supporting frame construction and comprises a support frame 55 and a receiving plate 56, via which the wall saw 54 is connected to the guide carriage 50. The support frame 55 is connected to the underside facing the floor to be machined with the chassis 53 and at the top with the receiving plate 56.

The guide frame 52 is formed as a U-shaped frame 57 which is connected at the closed end with a handle 58 for guiding the guide carriage 50 and at the open end to the support frame 55. The handle 58 includes a right handle member 59.1 and a left handle member 59.2, which are rigidly connected in the embodiment with the frame 57; Alternatively, the handle elements may be designed to the frame 57 adjustable. At the closed end of the frame 57, a holder 61 is additionally provided, which can accommodate the remote control 13 of the wall saw 54. The guide frame 52 is about a pivot axis 62 relative to the support frame 55 adjustable. By adjusting the pivot angle between the support frame 55 and the guide frame 52, the height of the handle 58 and the distance to the saw head 14 can be changed.

The chassis 53 comprises a, designed as a rear axle, first axis 64 with two wheels 65 and a front axle formed as a second axis 66 with two wheels 67; the wheels arranged on the front axle 66 are referred to as front wheels 67 and the wheels arranged on the rear axle 64 as rear wheels 65. In the embodiment, the rear axle 64 is driven and the front axle 66 is unpowered; Alternatively, the front axle can be driven and the rear axle is unpowered or the front and rear axles are driven together.

In order to assist the operator in the cutting guide, the guide carriage 50 has a cutting indicator 68 , which is provided on the front side of the support frame 55 facing away from the guide frame 52. The cut display device 68 is pivotable about a pivot axis 69 and comprises a frame member 71, a support wheel 72 and a display element 73. The wall saw 54 is arranged in the exemplary embodiment so that the saw blade 16 and the blade guard 21, viewed from the operator, on the left side the carriage 50 are arranged; this arrangement of the wall saw 54 is referred to as a left-hand arrangement. The left end of the display element 73 shows the operator the position of the saw blade 16 and thus the cutting process. When the wall saw 54 is placed on the receiving plate 56 so that the saw blade 16 and the blade guard 21, as viewed by the operator, are arranged on the right side of the carriage 50, which is referred to as the right arrangement, the right end of the display element 73 shows the Cutting progress.

The rear and front wheels 65, 67 are formed in the embodiment not steerable. In order to still maneuver the carriage 50 with the wall saw 54, the carriage 50 is tilted by the operator on the guide frame 52 to the rear and moved on the rear wheels 65. The maneuverability of the guide carriage 50 is influenced by the weight distribution of the wall saw 54 on the guide carriage 50. The weight distribution of the wall saw 54 varies in a saw head 14 with pivotable saw arm 17 with the pivot angle and the pivoting direction of the saw arm 17. In addition, the arrangement of the wall saw 54 on the carriage 50 affects the weight distribution; The right-hand arrangement of the wall saw 54 may have a different weight distribution than the left-hand arrangement of the wall saw 54.

In order to change the weight distribution on the carriage 50, a plurality of balance weights are provided on the carriage 50. A first counterweight 74 is provided in the region of the rear axle 64 and a second counterweight 75 is in the Area of the front axle 66 is provided. The first and second balance weights 74, 75 are attached to the support frame 55. For this purpose, 55 first socket pin 76 and second pin 77 are provided on the support frame, can be pushed onto the weight elements 78.1, 78.2, 79 . The first balance weight 74 consists of the two weight elements 78.1, 78.2, which are plugged onto the first pin 76 and stacked one above the other. The second balance weight 75 consists of the weight element 79, which is attached to the second locking pin 77.

In the embodiment, the weight elements 78.1, 78.2, 79 are equally heavy; Alternatively, the same heavy weight elements can be used with a different mass or weight elements are used with different masses. The socket pins 76, 77 allow easy assembly and disassembly of the weight elements 78.1, 78.2, 79, so that the balance weights 74, 75 can be adapted to the weight distribution of the wall saw 54 on the guide carriage 50. The guide carriage 50 comprises a set of several weight elements of different mass, which can be plugged onto the socket pins 76, 77 as needed.

The weight distribution of the wall saw 54 on the carriage 50 also affects the sawing operation. In order to achieve a uniform progress of the saw blade 16, the drive wheels must have a good traction and the saw blade 16 must be kept in the substrate to be processed. The first balance weight 74 is disposed on the rear axle 64 to improve the traction of the rear axle 64. When the drive shaft 64 is loaded with a balance weight, the drive wheels 65 have good contact with the ground and slippage of the drive wheels 65 is avoided. The second balance weight 75 is arranged in the region of the front axle 64 in order to hold the saw blade 16 in the ground and to prevent an upward movement of the saw blade 16.

FIG. 3 shows the guide carriage 50 of the invention FIG. 2A in the folded state in a three-dimensional view. For transport, the carriage 50 can be folded up and stowed away as a compact unit. The folding of the guide carriage 50 is carried out starting from the in FIG. 2A illustrated unfolded state.

The cut display device 68 and the frame 57 of the guide frame 52 are formed pivotable about pivot axes parallel to the axis of rotation of the rear axle, the cut display device 68 is pivotable about the pivot axis 69 and the frame 57 about the pivot axis 62. From the in FIG. 2A shown unfolded state of the carriage 50, the cut display device 68 is first pivoted about 180 ° about the pivot axis 69; in this position, the support wheel 72 is located on the support frame 55. To fold the frame 57, a screw is released and the frame 57 pivoted about 90 ° about the pivot axis 62; then the screw is tightened. FIGS. 4A , B show the base frame 51 of the guide carriage 50 of the invention FIG. 2A in a top view of the receiving plate 56 (FIG. FIG. 4A ) and in a view from below of the chassis 53 (FIG. FIG. 4B ). In order to transform the wall saw 54 by means of the guide carriage 50 in a floor saw with motor feed motion, the wall saw 54 must be securely fixed on the carriage 50 and on the other hand, the feed motor 27 of the wall saw 54 must be connected to the rear axle 64 to transmit power and torque ,

The attachment of the wall saw 54 on the guide carriage 50 via the receiving plate 56 which is fixed on the top of the support frame 55. The wall saw 54 is placed with the guide carriage 26 on the receiving plate 56. The receiving plate 56 has four holding elements 81.1, 81.2, 81.3, 81.4 , which can be brought into engagement with the guide elements 46.1, 46.2, 47.1, 47.2 of the guide carriage 26. The holding elements 81.1-81.4 ensure that, designed as guide rollers 46.1, 46.2, 47.1, 47.2, guide elements of the guide carriage 26 perform no rolling motion.

After placing the wall saw 54 on the receiving plate 56 are the fixed guide rollers 46.1, 46.2 of the guide carriage 26 to the support members 81.1, 81.2 of the receiving plate 56 at. Subsequently, the movable guide rollers 47.1, 47.2 of the guide carriage 26 are pivoted by means of the handle until the movable guide rollers 47.1, 47.2 bear against the holding elements 81.3, 81.4 of the receiving plate 56. When the wall saw 54 is placed on the guide carriage 50 in the right-hand arrangement, the fixed guide rollers 46.1, 46.2 of the guide carriage 26 rest on the holding elements 81.3, 81.4 and the movable guide rollers 47.1, 47.2 on the holding elements 81.1, 81.2.

The drive of the rear axle 64 via the feed motor 27 and a feed motor 27 associated gearbox of the wall saw 54. The movement of the feed motor 27 is transmitted via the associated gear to the gear 45 of the guide carriage 26. The rotational movement of the gear 45 is transmitted via a connecting device 82 and, designed as a chain gear 83 , transmission means on the rear axle 64. The connecting device 82 forms with the gear 45 of the guide carriage 26 a positive gear transmission.

The connecting device 82 comprises in the embodiment of FIGS. 4A , B two gears 84.1, 84.2, which are connected to the gear 50 of the guide carriage 26 and torque transmitting connectable. The first gear 84.1 of the connecting device 82 is engaged with the gear 45 of the guide carriage 26 when the wall saw 54 in the left Arrangement on the carriage 50 is arranged. The second gear 84.2 of the connecting device 82 is engaged with the gear 45 of the guide carriage 26 when the wall saw 54 is arranged in the right-hand arrangement on the guide carriage 50. When the gear of the guide carriage 26 is arranged in the center of the guide carriage 26, a gear is sufficient to connect the guide carriage 26 in the right and left arrangement with the guide carriage 50. For large and heavy wall saws, it may be necessary for the right and left arrangement of the wall saw on the carriage different mounting plates are provided.

The transmission device is designed as a chain drive 83 and comprises a chain 85, a tensioning roller 86 and a sprocket 87, which is mounted on the rear axle 64. The chain 85 transmits the rotation of the first or second gear 84.1, 84.2 of the connecting device 82 to the sprocket 87. The tension roller 86 ensures a uniform feed movement and reduces jerking movement of the guide carriage in the sawing operation. The chain transmission 83 is less susceptible to soiling than, for example, a belt drive with a closed belt due to the open chain links. In a belt transmission, the dirt can settle on the closed belt, whereas dirt in open chain links harder to set and can fall through the chain links.

For rail-guided wall saws, such as in FIG. 1A shown wall saw 12 and the in FIG. 2 B shown wall saw 54, the transmission for the swing motor 22 and the feed motor 27 are designed to be self-locking for safety reasons. When the wall saw 12, 54 is mounted on a wall, it must be ensured that the wall saw 12, 54 does not perform an uncontrolled feed movement in the event of a power interruption and the saw arm 17 does not move around the pivot axis 23 in an uncontrolled manner. The self-locking gear for the feed motor 27 causes the guide carriage 50 can be moved with mounted wall saw 54 only when power is supplied. In order to move the carriage 50 at wall saw 54 mounted even without a power supply, the transfer means 83 a coupling means 88 that a, when foot switch 89 formed, actuating element is actuated.

FIGS. 5A , B show the chassis 53 of the guide carriage 50 according to the invention and the driven rear axle 64 in the engaged state of the coupling device 88. It shows FIG. 5A the coupling device 88, which connects the rear axle 64 force and torque transmitting with the feed motor 27, and FIG. 5B the rear axle 64 in a section.

The rear axle 64 with the two rear wheels 65 via the feed motor 27, the feed motor 27 associated gear, the gear transmission 45, 82 (gear 45 and Gear 84.1, 84.2 of the connecting device 82) and the chain drive 83 is driven. The rear wheels 65 are arranged on a drive shaft 91 and torsionally rigidly connected to the drive shaft 91. The drive shaft 91 is mounted via a first and second pillow block 92.1, 92.2 , which are fixed to the underside of the support frame 55.

The coupling device 88 comprises a bearing 93, a toothed hub 94, a toothed sleeve 95, an actuating ring 96 and a compression spring 97. The sprocket 87 of the chain transmission 83 is mounted with the bearing 93 on the drive shaft 91 and rotatably connected to the toothed hub 94. The sprocket 87 and the gear hub 94 are formed in the embodiment as separate parts which are bolted together; Alternatively, the sprocket 87 and the gear hub 94 may be integrally formed. The toothed sleeve 95 is mounted against rotation on the drive shaft 91 and formed on the actuating ring 96 along the drive shaft 91 slidably. The actuating ring 96 is connected via a lever 98 which is rotatably mounted about an axis of rotation 99 , with the foot switch 89 and is displaced along the drive shaft 91 during the movement of the foot switch 89.

The foot switch 89 is adjustable between a first and second position, wherein the in FIG. 5A shown position of the foot switch 89 is defined as the first position. In the first position of the foot switch 89, the toothed sleeve 95 engages in the toothed hub 94. The toothed hub 94 has an inner geometry 101 , which is formed as an internal toothing, and the toothed sleeve 95 has a complementary outer geometry 102 , which is formed as an external toothing. When the toothed sleeve 95 engages the toothed hub 94, the external toothing 102 of the toothed sleeve 95 and the internal toothing 101 of the toothed hub 94 form a positive connection and the drive shaft 91 with the drive wheels 65 is connected to the feed motor 27 of the wall saw 54 in a force- and torque-transmitting manner.

FIGS. 6A B show the chassis 53 of the guide carriage 50 according to the invention and the driven rear axle 64 in the disengaged state of the coupling device 88, the disengaged state corresponding to the second position of the foot switch 89. It shows FIG. 6A the coupling device 88, which interrupts the power and torque transmission from the feed motor 27 to the rear axle 64, and FIG. 6B the rear axle 64 in a section.

The disengagement of the coupling device 88 via the foot switch 89, which is moved to the second position. Upon actuation of the foot switch 89 from the first position to the second position, the spring pressure of the compression spring 97 is overcome. The lever 98 acts on the actuating ring 96 and moves the, arranged on the toothed sleeve 95, actuating ring 96 against the compression spring 97 in the direction of the second pillow block 92.2. In the second position of the foot switch 89, the toothed sleeve 95 does not engage in the toothed hub 94 and the external toothing 102 of the toothed sleeve 95 is not positively connected to the internal toothing 101 of the toothed hub 94.

The toothed sleeve 95, which is connected to the actuating ring 96, is displaced from the toothed hub 94 and the positive connection between the internal toothing 101 of the toothed hub 94 and the external toothing 102 of the toothed sleeve 95 is canceled. Without a positive connection between the gear hub 94 and toothed sleeve 95, the force and torque transmission from the guide carriage 26 is interrupted on the drive shaft 91. By interrupting the power and torque transmission, the drive wheels 65 can be rolled on the drive shaft 64 with mounted wall saw 54 without power over the ground.

When footswitch 89 is moved from the operator's second position ( FIG. 6A ) to the first position ( FIG. 5A ) is moved, no force acts on the lever 98 and the toothed sleeve 95 exerts no force on the compression spring 97. The compression spring 97 presses the toothed sleeve 95 in the direction of the toothed hub 94 and the positive connection between the toothed hub 94 and the toothed sleeve 95 is produced.

FIGS. 7A , B show the wall saw 54 of FIG. 2 B , with the guide carriage 50 of the invention FIG. 2A designed as a floor saw ( FIG. 7A ) and which forms with a guide rail 111 a rail-guided wall saw system ( FIG. 7B ). The wall saw 54 includes the saw head 14 with the saw arm 17, on which the saw blade 16 is fixed, and the guide carriage 26. The wall saw 54 is fixed by means of the guide carriage 26 on the guide carriage 50 and on the guide rail 101.

The guide carriage 26 includes in the embodiment of FIG. 2 B two fixed guide rollers 46.1, 46.2 and two movable guide rollers 47.1, 47.2. The fixed guide rollers 46.1, 46.2 are located on the saw arm 17 facing side of the saw head 14 and the movable guide rollers 47.1, 47.2 on the side facing away from the saw arm 17, the saw head 14th

FIG. 7A shows the wall saw 54 which is mounted on the carriage 50 and forms a floor saw with the carriage 50. The wall saw 54 is placed with the guide carriage 26 on the receiving plate 56 of the guide carriage 50, that the fixed guide rollers 46.1, 46.2 of the guide carriage 26 abut against the holding elements 81.3, 81.4 of the receiving plate 56. Subsequently, the movable guide rollers 47.1, 47.2 of the guide carriage 26 are pivoted by means of the handle until the movable guide rollers 47.1, 47.2 bear against the holding elements 81.1, 81.2 of the receiving plate 56. When the wall saw 54 is fixed on the receiving plate 56, the gear 45 of the guide carriage 26 engages the second gear 84.2 of the connecting device 82 and the movement of the feed motor 27 is converted via the chain gear 83 in a rotation of the drive shaft 91.

FIG. 7B shows the wall saw 54 which is mounted on the guide rail 101 and forms with the guide rail 101, a rail-guided Wandsägesystem. The guide rail 111 is attached via rail feet 112 on the substrate to be processed, which may be formed as a wall, floor or ceiling. The guide rail 101 comprises a round tube 113 as the main body, a rack 114 and two V-shaped guide surfaces 115.1, 115.2, wherein the geometry of the guide surfaces 115.1, 115.2 is adapted to the geometry of the guide rollers 46.1, 46.2, 47.1, 47.2 of the guide carriage 26.

The wall saw 54 is placed with the guide carriage 26 on the guide rail 111, that the fixed guide rollers 46.1, 46.2 of the guide carriage 26 abut against the first guide surface 115.1. Subsequently, the movable guide rollers 47.1, 47.2 of the guide carriage 26 are pivoted by means of the handle until the movable guide rollers 47.1, 47.2 bear against the second guide surface 115.2. When the wall saw 54 is fixed to the guide rail 111, the gear 45 of the guide carriage 26 engages with the rack 114 of the guide rail and the rotational movement of the feed motor 27 is converted into a translational movement along the guide rail 111 via the rack gear 45 and rack 114.

FIGS. 8A B show an alternative embodiment of a drive axle 121 for the guide carriage 50 according to the invention with a coupling device 122 in the engaged state ( FIG. 8A ), in which the drive axle 121 is connected to the feed motor 27 of the wall saw 54 in a force-transmitting and torque-transmitting manner, and in the disengaged state (FIG. FIG. 8B ), in which the force and torque transmission is interrupted and the drive wheels 123, 124 are decoupled from each other. The drive axle 121 can replace the driven rear axle 64 in the guide carriage 50 or be used instead of the non-driven front axle 66.

The drive wheels 123, 124 are arranged on a drive shaft 125 , wherein the first drive wheel 123 is rotationally rigidly coupled to the drive shaft 125 and the second drive wheel 124 is formed by the drive shaft 125 decoupled. The drive shaft 125 is mounted via a first and second pillow block 126.1, 126.2 , which are fastened to the underside of the support frame 55.

The coupling device 122 is analogous to the coupling device 88 of FIGS. 5 and 6 trained and is actuated via the foot switch 89. The coupling device 122 comprises the toothed hub 94, which is non-rotatably connected to the sprocket 87 of the chain transmission 83, and the toothed sleeve 95, which is mounted against rotation on the drive shaft 125 and slidably formed via the actuating ring 96 along the drive shaft 125. The coupling device 122 differs from the coupling device 88 in that the toothed sleeve 95 on the end facing away from the external toothing 102 with a Connecting rod 127 is connected, which is slidably disposed in the drive shaft 125.

The second drive wheel 124 is mounted on the drive shaft 125 and decoupled via a toothed gear 128 of the drive shaft 125. The toothed gear 128 comprises a toothed disk 129 with an external toothing 131 which can form a positive connection with an internal toothing 132 . In the engaged state of the clutch device 122, the external teeth 131 is positively connected to the internal teeth 132 and the second drive wheel 124 is rotatably connected to the drive shaft 125. In the disengaged state of the coupling device 122, the external teeth 131 and the internal teeth 132 are not positively connected and the second drive wheel 124 is decoupled from the drive shaft 125. The decoupling of the second drive wheel 124 from the drive shaft 125 from the first drive gear 123, which is non-rotatably connected to the drive shaft 125, causes the two drive wheels 123, 124 can independently roll on the ground and the maneuverability of the carriage 50 is improved.

In the embodiment of FIGS. 8A , B is the decoupling of the second drive wheel 124 of the drive shaft 125 with the disengagement of the coupling device 122 combined. Since the decoupling of the two drive wheels 123, 124 is required when the carriage 50 is moved without motor assistance, the combination of decoupling and decoupling is useful. The combination of the equipment can be reduced and the ease of use for the operator can be increased. The operator only has to move the foot switch 89 between the first position and the second position.

Claims (13)

Guide carriage (50) for a wall saw (54) comprising a saw head (14) and a motor feed unit (15) with a guide carriage (26) and a feed motor (27), wherein the wall saw (54) by means of a gear (45) of Guiding carriage (26) with the rack (42; 114) of a guide rail (11; 111) is connectable and by means of guide elements (46.1, 46.2, 47.1, 47.2) of the guide carriage (26) along guide surfaces (43.1, 43.2, 115.1, 115.2) the guide rail (11; 111) is movable, comprising: A base frame (51) having a support frame (55) and a receiving plate (56) connectable to the wall saw (54), A guide frame (52) with a handle (58), wherein the guide frame (52) is connected to the base frame (51), and A chassis (53) having a first axle (64; 121), a second axle (66) and at least three wheels (65,67,123,124) mounted on the first and second axles (64,66; 121) are arranged, wherein the chassis (53) is arranged on an underside of the support frame (55), characterized in that at least one wheel (65; 123,124) of the chassis (53) by means of a connecting device (82) force and torque transmitting with the gear (45) of the guide carriage (26) is formed connectable. Guide carriage according to claim 1, characterized in that the connecting device (82) has at least one toothed wheel (84.1, 84.2) which is connectable to the toothed wheel (45) of the guide carriage (26) in a force-transmitting and torque-transmitting manner. Guide carriage according to claim 2, characterized in that the connecting device (82) has a first gear (84.1) and a second gear (84.2), wherein the first or second gear (84.1, 84.2) with the gear (45) of the guide carriage (26 ) can be connected force-transmitting and torque-transmitting. Guide carriage according to one of claims 2 to 3, characterized in that a transfer device (83) is provided, which between the first or second gear (84.1, 84.2) of the connecting device (82) and the first axis (64; 121) and / or second axis (66) is arranged transmitting force and torque. Guide carriage according to claim 4, characterized in that a coupling device (88; 122) is provided which is adjustable between a coupled state and a disengaged state, wherein the gear (84.1, 84.2) of the connecting device (82) in the engaged state force and torque transmitting with the at least one wheel (65; 123, 124) is connected and in the disengaged state the force and torque transmission from the gear (84.1, 84.2) of the connecting device (82) to at least one wheel (65; 123, 124) is interrupted. Guide carriage according to claim 5, characterized in that the coupling device (88; 122) via a foot switch (89) is adjustable between the engaged state and the disengaged state. Carriage according to one of claims 1 to 6, characterized in that the receiving plate (56) has at least one holding element (81.1, 81.2, 81.3, 81.4), which with at least one guide element (46.1, 46.2, 47.1, 47.2) of the guide carriage (26 ) is engageable. Carriage according to claim 7, characterized in that the receiving plate (56) has a plurality of holding elements (81.1, 81.2, 81.3, 81.4) which can be brought into engagement with the guide elements (46.1, 46.2, 47.1, 47.2) of the guide carriage (26). Guide carriage according to one of claims 1 to 8, characterized in that at least one balance weight (74, 75) is provided, which is fastened to the support frame (55). Guide cart according to claim 9, characterized in that a first balancing weight (74) and a second balance weight (75) are provided, said first balance weight (74) in the region of the first axis (64) and the second balance weight (75) in the area of second axis (66) are arranged. Carriage according to claim 10, characterized in that on the support frame (55) at least one first locking pin (76) and at least one second locking pin (77) is provided, wherein the first balance weight (74) on the first locking pin (76) and the second balance weight ( 75) on the second locking pin (77) can be fastened. Guide carriage according to one of claims 1 to 11, characterized in that two wheels (123, 124) of the chassis (53) on a common drive shaft (125) of the first or second axis (64, 66) are arranged, force and torque transmitting with the gear (45) of the guide carriage (26) are formed connectable, wherein a wheel (124) of the drive shaft (125) is decoupled. Guide cart according to claim 12, characterized in that the from the drive shaft (125) disengageable wheel (124) is decoupled in the disengaged state of the clutch device (122) from the drive shaft (125).

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