Chassis for a track maintenance machine and method for maintaining a track with such a track maintenance machine

Abstract

A chassis (1) for a manually movable track maintenance machine (8) comprises a carrier (2), a plurality of guide rollers (5, 5', 5'', 5''') arranged on the carrier (2) for manually moving the chassis (1) on rails (S) of a track, and a braking unit (6) for braking the chassis (1), wherein the braking unit (6) can be electrically controlled.

Description

[0001] Chassis for a track maintenance machine and method for machining a track with such a track maintenance machine

[0002] This patent application claims priority from German patent application DE 10 2023 207 951.8, the contents of which are incorporated herein by reference.

[0003] The invention relates to a chassis for a manually displaceable track processing machine and a track processing machine with such a chassis as well as a method for processing a track with such a track processing machine.

[0004] GB 2 506 057 B discloses a trolley with a braking device for use on rails. The braking device has a dead man's function, which brakes the trolley in a basic position. By operating a lever, the braking device can be released via a Bowden cable, allowing the trolley to be manually moved along the rails.

[0005] The object of the present invention is to provide a chassis which is simple, comfortable and safe to operate and, moreover, can be produced cost-effectively.

[0006] This object is achieved by a chassis with the features of claim 1. According to the invention, it was recognized that a chassis with an electrically controllable brake unit can be operated considerably more easily, conveniently, and in particular more safely. The reason for this is that the braking force of the brake unit can be adjusted or applied independently of the operating force applied by the operator. In other words, the chassis with an electrically controllable brake unit eliminates in particular the disadvantage of the prior art, according to which the braking force is equal to the operating force applied by the operator. The chassis thus has an improved braking function, which in particular significantly increases operating safety. When the brake unit is electrically controlled, electrical energy is converted into a mechanical braking force. In particular, the brake unit can be controlled via an electrical control signal.The brake unit is particularly designed to receive an electrical control signal. The chassis with an electrically controllable brake unit enables, in particular, individual adjustment of the braking force for braking the chassis. In particular, any fluctuations in the operating force applied by the operator when controlling the brake unit can be compensated for. This ensures that the brake unit has a consistent braking force. Furthermore, the chassis can be braked more quickly, since when controlling the brake unit with a low operating force, a significantly higher braking force can be applied to brake the chassis compared to the applied operating force. This increases the functional reliability of the chassis.At the same time, the chassis features improved operability, as less operating force is required when activating the brake unit and there is improved responsiveness and a shorter reaction time.

[0007] The chassis also has fewer mechanical components and connections. This advantageously results in lower maintenance effort and lower maintenance costs. Furthermore, the chassis requires significantly less maintenance due to the smaller number of mechanical components.

[0008] The bogie is in a braking position when the guide rollers are prevented from rolling on the rails of a track. In other words, moving the bogie is not possible in the braking position. In contrast, the bogie is in a release position when the guide rollers are allowed to roll. In the release position, the bogie is in an unbraked state. In other words, manual movement of the bogie is possible in the release position.

[0009] Advantageously, the brake unit is modular. Due to its modular design, an existing chassis can be easily and simply retrofitted with an electrically controlled brake unit. Such a chassis is particularly cost-effective to manufacture.

[0010] Advantageously, the braking unit acts directly on the guide rollers, in particular on one of the guide rollers, and / or on at least one rail of the track to brake the bogie, in order to prevent the guide rollers from rolling or to brake the bogie. In particular, the bogie has two to six, advantageously four, guide rollers. Advantageously, the braking unit acts on at least one guide roller, in particular at least two guide rollers, and in particular all guide rollers.

[0011] Advantageously, the carrier has at least one mounting bracket, wherein the guide rollers are arranged on a cross member via the at least one mounting bracket. In other words, the at least one mounting bracket serves to arrange the guide rollers on the cross member.

[0012] The chassis can have two mounts, one mounted at each end of the cross member. In this case, the chassis is designed as a transverse chassis. In a chassis designed as a transverse chassis, the chassis has two mounts.

[0013] The chassis can be designed as a monorail. In a monorail design, the chassis has only one support. In particular, in a monorail design, the cross member is designed as a boom, with the boom having a support roller at one end.

[0014] The chassis is used exclusively for the manual movement of a track maintenance machine by an operator. The chassis is not designed to be movable by means of a drive. In particular, the chassis does not include a drive.

[0015] The chassis serves to accommodate a processing device for processing a track. The chassis, together with the processing device mounted on it, forms the track processing machine.

[0016] A bogie according to claim 2 enables simple, comfortable, and safe operation as well as cost-effective production. The braking element serves to brake the bogie on the rails of the track. Advantageously, the braking element interacts with at least one guide roller to brake the bogie or to prevent the guide rollers from rolling. The braking element can act directly on at least one rail to brake the bogie or to prevent the guide rollers from rolling. When the braking element is actuated, the bogie is in the braking position. When the braking element is not actuated, the bogie is in the release position.

[0017] According to an advantageous embodiment, each brakeable guide roller is assigned a brake element and / or brake actuator. In other words, the brake unit has the same number of brake elements and / or brake actuators as the chassis has brakeable guide rollers. This enables particularly safe operation. Preferably, at least one guide roller, in particular at least two guide rollers, and in particular all guide rollers, are brakeable.

[0018] In particular, the respective brakeable guide roller has at least one receiving recess for receiving the braking element. This ensures that the braking element engages with the guide roller and prevents the guide roller from rolling. In particular, the guide roller has two to six receiving recesses, for example four receiving recesses. A plurality of receiving recesses increases the engagement options of the braking element on the guide rollers. This has the advantage of improving the interaction of the braking element with the respective guide roller when controlling the braking unit or when actuating the braking element by the brake actuator. This significantly increases the operating safety of the chassis.

[0019] Advantageously, the brake element comprises a brake piston that is displaceably arranged within a brake element guide. The brake element guide serves to guide and displace the brake piston.

[0020] The brake actuator is arranged in particular on the carrier. Advantageously, the brake actuator is arranged on the carrier via a holding element. Advantageously, the brake actuator is designed such that it can be electrically controlled. The brake actuator is designed in particular to receive an electrical control signal. The brake actuator serves to actuate the brake element. Advantageously, the brake actuator is designed such that it actuates the brake element electrically, magnetically, pneumatically, and / or hydraulically. The brake actuator can be designed as a linear drive. This ensures reliable actuation of the brake element. At the same time, maintenance effort is reduced. The brake actuator can act directly and / or indirectly on the brake element. Advantageously, each brake element of the brake unit is assigned a brake actuator, wherein the brake element and the brake actuator are designed modularly.This allows for easy replacement of the brake element and / or the brake actuator. A brake actuator can be assigned to multiple brake elements. In such a configuration, the plurality of brake elements can be actuated by the single brake actuator.

[0021] According to an advantageous embodiment, the brake actuator is designed as a direct-acting brake actuator. A direct-acting brake actuator is understood to mean a direct actuation of the brake element by the brake actuator. For example, the direct-acting brake actuator is designed as a lifting magnet having a lifting cylinder. The lifting cylinder is displaceably arranged in the lifting magnet, with the lifting cylinder serving as a braking element or being designed as a braking element. In particular, the lifting cylinder acting as a braking element engages in the receiving recess of the respective guide roller.

[0022] According to a further advantageous embodiment, the brake actuator is designed as an indirectly acting brake actuator. An indirectly acting brake actuator is understood to mean an indirect, in particular an indirectly mechanical, actuation of the brake element by the brake actuator. In other words, the brake element is operatively connected to the brake actuator via a mechanism. Advantageously, the brake actuator is operatively connected to the brake element via a pivot element. The pivot element is advantageously arranged on the carrier and / or on the holding element in such a way that it is pivotally mounted via a pivot pin. Actuating the brake actuator causes the pivot element to pivot and thus actuates the brake element. Advantageously, the pivot element is connected to the brake element via a connecting element. In particular, the brake element is detachably arranged on the holding element.This allows for easy and individual replacement of the brake element.

[0023] Preferably, a spring element exerts a preload in a preload direction on the braking element. The braking element is in the braking position due to the spring element.

[0024] When the brake actuator is activated, the preloaded brake element can be moved in the opposite direction to the preload direction.

[0025] According to a further advantageous embodiment, the brake actuator is designed for a monorail undercarriage. Advantageously, a bracket of the carrier, which serves to arrange the guide rollers, defines a boundary plane E, wherein the brake actuator has a side facing the boundary plane E, and this side extends at most to the boundary plane E. Advantageously, a central longitudinal axis of the brake actuator runs parallel to a longitudinal direction or rail longitudinal direction. In other words, the brake actuator is arranged on the bracket such that the central longitudinal axis runs parallel to the longitudinal direction. This arrangement of the brake actuator has the advantage that the radius of movement of the processing device arranged on the undercarriage is not restricted by the braking element and the brake actuator.The machining device has a maximum radius of movement because the braking element and the braking actuator do not restrict the radius of movement due to their horizontal arrangement along the longitudinal direction and below the limiting plane E.

[0026] A chassis according to claim 3 enables safe operation and cost-effective production. Advantageously, a braking element acts on at least one guide roller to decelerate the chassis. The braking element acts directly on the at least one guide roller, in particular on an outer surface of the at least one guide roller. To decelerate the chassis, the braking element is in contact with the outer surface of the at least one guide roller.

[0027] A chassis according to claim 4 enables safe operation and cost-effective production. The electrical supply line and the connecting contacts serve to electrically connect the brake actuator to a power supply unit. If a power supply unit is electrically connected to the connecting contacts, a supply circuit is formed. The supply circuit serves to provide electrical energy or to supply the brake actuator with current. This allows the braking element to be actuated when the brake actuator is electrically controlled.

[0028] A chassis according to claim 5 enables particularly safe operation. The switching element is arranged in particular on the carrier and / or on a processing device. According to an advantageous embodiment, the switching element is integrated into the brake actuator. In other words, the switching element is part of the brake actuator. This enables a particularly compact design. Advantageously, the switching element is designed as a relay. Advantageously, the brake actuator can be controlled via the switching element. In particular, the switching element serves to control the brake actuator or to manually interrupt the supply circuit by the operator. Advantageously, the brake actuator can be controlled directly or indirectly via the switching element. The switching element can also be designed as a line bridge, which can be used when a processing device is arranged on the carrier orthe chassis closes the supply circuit at least in sections.

[0029] A chassis according to claim 6 enables simple and safe operation. Furthermore, such a chassis can be manufactured particularly cost-effectively. The actuating element is advantageously arranged on the support and / or on a processing device. The actuating element serves to control the brake actuator, for example, directly or indirectly by means of the switching element. The brake actuator can be manually controlled by the operator using the actuating element. In particular, the actuating element serves for the manual actuation of the brake actuator by the operator. In particular, the chassis is in a braking position when the brake element is actuated and in a release position when the brake element is not actuated.

[0030] In particular, the actuating element and the brake actuator and / or the switching element are signal-connected. Advantageously, the brake actuator and / or the switching element can be controlled via an electrical control signal from the actuating element. In other words, an electrical control signal can be provided by the operator actuating the actuating element, thereby actuating the brake actuator and / or the switching element. In particular, the signal connection is established via a signal line and / or wirelessly.

[0031] A chassis according to claim 7 enables particularly simple and safe operation. Such a chassis has a dead man's function. According to the invention, the dead man's function means that the chassis is in the braking position when the actuating element is not actuated and in the release position when the actuating element is actuated. Consequently, the chassis is permanently braked when the actuating element is not actuated, and rolling of the guide rollers is prevented. When the actuating element is actuated, the chassis is in the release position, thereby enabling the guide rollers to roll. Preferably, an electrical control signal is generated in the release position by means of the actuating element.

[0032] A chassis according to claim 8 enables cost-effective production. The power supply unit serves to supply the brake unit, in particular the supply circuit and the brake actuator, with electrical energy. Advantageously, the power supply unit is designed as a separate component, in particular as a rechargeable battery. In particular, the power supply unit is designed to be modular. This has the advantage that the chassis can be retrofitted with a power supply unit. According to a particularly advantageous embodiment, the power supply unit is detachably arranged on the support. This enables a particularly simple construction and easy replacement of the power supply unit.

[0033] Advantageously, the power supply unit serves to supply the processing device and / or the braking unit with electrical energy. This has the advantage that a track maintenance machine only needs to have one power supply unit.

[0034] A chassis according to claim 9 enables particularly simple and safe operation. The control unit is arranged, in particular, on the support and / or on a processing device. Advantageously, the control unit is connected to the supply circuit. The control unit serves, in particular, to control the processing device and / or the braking unit. Advantageously, the braking unit can be controlled automatically by the control unit.

[0035] In particular, the braking unit is automatically activated after a predefined time interval Δt has elapsed, during which the processing device is unused or not being used by the operator. In other words, the braking unit can be activated by the control unit, particularly when the operator is inactive and / or the processing device is inactive after a predefined time interval Δt has elapsed. In particular, the following applies: 3 s < Δt < 300 s, in particular 10 s < Δt < 240 s, in particular 30 s < Δt < 180 s, in particular 60 s < Δt < 150 s, and in particular 90 s < Δt < 120 s.

[0036] Advantageously, the control unit is designed such that the braking unit, in particular the braking force of the braking unit, can be automatically adjusted to changing chassis loads. Changing chassis loads are understood to mean, in particular, changed conditions under which the chassis is operated. According to the invention, changing chassis loads are understood to mean, in particular but not exclusively, a changed gradient of the track along a longitudinal rail direction and / or a changed inclination of the track in the transverse track direction and / or a change in the frictional force of the chassis on the rails due to changing weather conditions. Advantageously, the control unit has at least one sensor for detecting the chassis loads. This has the advantage that the braking distance of the chassis is constant or can be kept constant under changing or different conditions.This significantly increases the operating safety of the chassis. Furthermore, the chassis is much easier for the operator to operate. In particular, the control unit is designed to perform a tamper check and / or to automatically activate the braking unit when predefined movement patterns occur. This protects the braking unit, particularly against tampering and incorrect operation by the operator.

[0037] A chassis according to claim 10 enables particularly safe operation. The motion detection device is arranged in particular on the carrier and / or a processing device. The motion detection device is designed, for example, as an acceleration sensor and / or a position sensor or as a GPS module and / or as a speed sensor and / or as an acceleration sensor.

[0038] In particular, the motion detection device is signal-connected to the control unit. Advantageously, the motion detection device is integrated into the control unit. Preferably, the motion detection device is connected to the power supply circuit.

[0039] Advantageously, the automatic control of the brake unit by the control unit occurs when the chassis is moving at an increased speed v, where in particular v > 4 m / s, in particular v > 3 m / s, advantageously v > 2 m / s. Advantageously, the automatic control of the brake unit by the control unit occurs when the chassis is moving at an acceleration a, where in particular a > 2 m / s 2 , especially a > 1 m / s 2 , advantageously a > 0.5 m / s 2 This makes the chassis particularly user-friendly and safe.

[0040] A chassis according to claim 11 enables particularly safe operation. The braking unit can be controlled automatically, in particular by means of the control unit, depending on a control signal from the motion detection device. The motion detection device detects, in particular, when the chassis has not been moved for a predefined time interval Δt and / or is moving at at least one predefined speed and / or is moving with at least one predefined acceleration. If the predefined time interval Δt and / or the predefined speed v and / or the predefined acceleration a are reached or exceeded, the motion detection device provides the control unit with a control signal. Depending on the control signal, the control unit automatically controls the braking unit.This allows unwanted movements of the chassis to be detected in the event of a tampered actuation of the brake unit, while still stopping the chassis. A chassis according to claim 12 enables particularly simple and safe operation. Furthermore, such a chassis can be manufactured particularly cost-effectively. The machining device connecting element serves to detachably connect a machining device to the chassis. In particular, the machining device connecting element is arranged on the support. This makes the machining device replaceable.

[0041] Advantageously, the machining device connecting element interacts with a chassis connecting element of the machining device. In particular, the chassis connecting element has a conductor bridge for at least partially closing the supply circuit.

[0042] According to an advantageous embodiment, the supply circuit is electrically closed when the machining device is positioned on the chassis and the switching element is closed, if applicable. In other words, the brake actuator can be controlled when the machining device is mounted or positioned on the chassis, since the brake actuator can be supplied with power by the power supply unit when the supply circuit is closed.

[0043] A further object of the present invention is to provide a track maintenance machine which is simple, comfortable and safe to operate and, moreover, can be manufactured cost-effectively.

[0044] This object is achieved by a track maintenance machine according to the features of claim 13. The advantages of the track maintenance machine according to the invention correspond to the previously explained advantages of the chassis according to the invention. In particular, the track maintenance machine can be further developed with the features of the chassis. For example, the processing device is designed for grinding, drilling, screwing, and / or clipping.

[0045] In particular, the processing device is permanently connected to the chassis. According to a particularly advantageous embodiment, the processing device is detachably and thus replaceably connected to the chassis. This has the advantage that the chassis of the track maintenance machine can be equipped with a variety of different processing devices. This allows the track maintenance machine to be individually adapted to the type of processing using a corresponding processing device.

[0046] Advantageously, the track maintenance machine comprises a higher-level control unit for controlling and / or monitoring the maintenance device and / or for controlling and / or monitoring the braking unit. This enables particularly simple and safe operation and is also cost-effective to manufacture, since the track maintenance machine as a whole only comprises the higher-level control unit, which simultaneously serves to control and / or monitor the maintenance device and the braking unit.

[0047] Advantageously, the track maintenance machine has a higher-level power supply unit. The higher-level power supply unit serves to supply the maintenance device with electrical energy. According to a particularly advantageous embodiment, the supply circuit of the brake unit can be supplied with electrical energy via the higher-level power supply unit. This has the advantage that the brake unit does not require its own power supply unit, since the supply circuit of the brake unit is connected to the higher-level power supply unit.

[0048] A track maintenance machine according to claim 14 enables simple and safe operation and is also cost-effective to manufacture. The maintenance unit is used to maintain the track. Advantageously, the maintenance unit is designed as a grinding unit, a clipping unit, a drilling unit, and / or a screwing unit.

[0049] The base support serves to arrange the processing unit or the processing device on the chassis. For this purpose, the base support comprises, in particular, a chassis connecting element. In particular, the base support is firmly connected to the processing unit. Advantageously, the base support is designed as a separate component. In other words, the base support can be modular, allowing the processing unit to be retrofitted with the base support. In particular, the processing unit, a power supply unit, a control unit, and / or the at least one handle are arranged on the base support. A track processing machine according to claim 15 enables simple and safe operation.Because the chassis connection element of the machining device forms a conductor bridge for the supply circuit, the brake unit can only be moved from the braking position to the release position when a machining device is mounted on the chassis. Unintentional displacement of the chassis is thus impossible.

[0050] A track maintenance machine according to claim 16 enables particularly simple operation of the brake unit, since the actuating element is easily accessible and operable by the operator. In particular, the actuating element is arranged directly next to a gripping area of ​​the handle, thus enabling particularly simple operation. The gripping area is the area in which the operator grasps the track maintenance machine to manually move it.

[0051] A further object of the present invention is to provide a method for processing a track which can be carried out simply, comfortably and safely.

[0052] This object is achieved by a method having the features of claim 17. The advantages of the method according to the invention correspond to the previously explained advantages of the bogie according to the invention and / or the track maintenance machine according to the invention. In particular, the method can be further developed with the features of the bogie and / or the track maintenance machine.

[0053] The method can be further developed, in particular, with the step of moving the braking unit from the release position to the braking position upon interruption and / or termination of processing. Advantageously, the control unit automatically detects an interruption and / or termination of processing via the motion detection device.

[0054] Further advantages, features, and details of the invention will become apparent from the following description of several exemplary embodiments. In the drawings: Fig. 1 shows a perspective view of a track maintenance machine with a chassis and a maintenance device according to a first exemplary embodiment.

[0055] Fig. 2 is a perspective view of the chassis according to Fig. 1,

[0056] Fig. 3 is a schematic representation of the supply circuit of the chassis according to Fig. 1 with control unit and motion detection device,

[0057] Fig. 4 is an enlarged sectional view of the chassis according to Fig. 1 in braking position,

[0058] Fig. 5 is an enlarged sectional view of the chassis according to Fig. 1 in the release position,

[0059] Fig. 6 is an enlarged sectional view of the chassis according to a second embodiment in braking position,

[0060] Fig. 7 is an enlarged sectional view of the chassis according to Fig. 6 in the release position,

[0061] Fig. 8 is an enlarged sectional view of the chassis according to a third embodiment in braking position,

[0062] Fig. 9 is an enlarged sectional view of the chassis according to Fig. 8 in the release position,

[0063] Fig. 10 is a perspective view of a track processing machine with a processing device and a chassis according to a fourth embodiment, Fig. 11 is an enlarged sectional view of a support of the chassis according to Fig. 10,

[0064] Fig. 12 is a sectional view of a track processing machine with a processing device and a chassis according to a fifth embodiment, and

[0065] Fig. 13 is a front view of a track processing machine with a processing device and a chassis according to a sixth embodiment.

[0066] A first exemplary embodiment of the bogie 1 according to the invention is described below with reference to Figs. 1 to 5. Fig. 1 shows a track processing machine 8 with a bogie 1 and a processing device 4 arranged thereon for processing the rails S of a track G. The track processing machine 8 shown in the exemplary embodiment is a rail grinding machine. The rail grinding machine serves to grind the rails S of the track G.

[0067] The bogie 1 shown in the figures is designed as a transverse bogie and has a support 2. The support 2 comprises a first bracket 3 and a second bracket 3', which are connected to each other via a cross member 2'. Two guide rollers 5, 5' and 5", 5'" are arranged on the brackets 3 and 3', respectively. The guide rollers 5 to 5'" serve to manually move the bogie 1 on rails S of a track G.

[0068] The chassis 1 is adjustable between a braking position B, in which rolling of the guide rollers 5 to 5'" is prevented, and a release position F, in which rolling of the guide rollers 5 to 5"' is permitted. In the braked state, the chassis 1 is in a braking position B. In the release position F, the chassis 1 is in an unbraked state.

[0069] For this purpose, the bogie 1 has a brake unit 6. In the illustrated embodiment, the brake unit 6 has two brake actuators 13 and 13' and two brake elements 7 and 7'. The brake elements 7 and 7' serve to brake the bogie 1. The brake actuators 13 and 13' serve to actuate the brake elements 7 and 7'. The first brake element 7 and the first brake actuator 13 are arranged on the first bracket 3, with the first brake element 7 acting on the guide roller 5'. The second brake element 7' and the second brake actuator 13' are arranged on the second bracket 3', with the second brake element 7' acting on the guide roller 5". Alternatively, it is conceivable that the brake elements 7 and 7' act directly on the rails S of the track G in order to brake the bogie 1.

[0070] The processing device 4 has a processing unit 46 for processing the rails of the track. In the illustrated embodiment, the processing unit 46 is designed as a grinding unit.

[0071] The processing device 4 has a control unit 18 and a motion detection device 19. In the illustrated embodiment, the control unit 18 of the processing device 4 serves to control and / or monitor the processing device 4 and simultaneously to control and / or monitor the braking unit 6. In other words, the illustrated control unit 18 is a higher-level control unit for controlling and / or monitoring the processing device 4 and the braking unit 6. The control unit 18 is arranged on the processing device 4 and is signal-connected to the braking unit 6.

[0072] The motion detection device 19 serves to detect a movement of the chassis 1 or the track maintenance machine 8 and is designed in particular as a speed sensor. The motion detection device 19 is signal-connected to the control unit 18 and, in the illustrated embodiment, is integrated into the control unit 18.

[0073] The brake unit 6 has an electrical supply line 11, which, when connected to a power supply unit 12, forms a supply circuit 10. The electrical supply line 11 serves to electrically connect or connect the brake actuators 13 and 13' to the power supply unit 12. A schematic representation of the supply circuit 10 is shown in Fig. 3.

[0074] The power supply unit 12 serves to provide electrical energy or current for the brake actuators 13 and 13' as well as for the supply circuit 10. The power supply unit 12 is electrically connected to the electrical supply line 11 via electrical connection contacts 14 and 14'. The brake actuators 13 and 13' for actuating the brake elements 7 and 7' can be electrically controlled by means of the supply circuit 10. The power supply unit 12 shown is a higher-level power supply unit for supplying or providing electrical energy for the processing device 4 and for the brake unit 6. The power supply unit 12 is arranged on the processing device 4.

[0075] The brake unit 6 has a switching element 15, which can be seen in Fig. 3. The switching element 15 serves to interrupt and close the supply circuit 10. The switching element 15 is designed, for example, as a relay.

[0076] The brake unit 6 also has an actuating element 16. The actuating element 16 serves to control the brake actuators 13 and 13' via the switching element 15.

[0077] The actuating element 16 is arranged on a handle 17 of the track maintenance machine 8. By means of the actuating element 16, the brake actuators 13 and 13' can be manually controlled by the operator indirectly via the switching element 15. In other words, the manual actuation of the actuating element 16 by the operator generates a control signal A, whereby the switching element 15 can be switched, the supply circuit 10 is closed and energized, the brake actuators 13 and 13' can be controlled, and the brake elements 7 and 7' can be actuated.

[0078] The bogie 1 has a deadman's function. The deadman's function means that the brake unit 6 is in a braking position B when the actuating element 16 is not actuated, whereby the bogie 1 or the track maintenance machine 8 is permanently braked. In braking position B, the guide rollers 5' and 5" are prevented from rolling. In other words, the braking elements 7 and 7' act on the guide rollers 5' and 5" in braking position B.

[0079] By manually actuating the actuating element 16 by the operator, the chassis 1 can be moved from the braking position B to the release position F. By manually actuating the actuating element 16, the control signal A can be generated, whereby the brake actuators 13 and 13' can be controlled via the switching element 15, and these actuate the braking elements 7 and 7'. In the release position F, the guide rollers 5' and 5" can roll.

[0080] Alternatively, it is conceivable to provide a chassis 1 with a brake unit 6, wherein the brake unit 6 has a braking function in the form of a parking brake. In this case, the chassis 1 is in the braking position B when the actuating element 16 is manually actuated, while the chassis 1 is in a release position F when the actuating element 16 is not actuated.

[0081] The structure and function of the brake element 7 and the brake actuator 13 of the electrically controllable brake unit 6 are described below. The following explanations apply analogously to the brake element 7' and the brake actuator 13'.

[0082] 4 and 5 show the chassis 1 according to Fig. 1, wherein the brake actuator 13 is designed as a direct-acting brake actuator. The direct-acting brake actuator 13 is designed as a lifting magnet 20, in which a lifting cylinder 21 designed as a braking element 7 is displaceably arranged. The lifting cylinder 21 is preloaded by means of a spring element 37. The lifting magnet 20 is detachably arranged on the bracket 3 via a threaded connection 33. The guide roller 5' has a plurality of receiving recesses 22, 22', 22" and 22'". The receiving recesses 22, 22', 22" and 22"' serve to receive the lifting cylinder 21 designed as a braking element 7. In braking position B, the lifting magnet 20 is de-energized and not actuated. In other words, the brake actuator 13 in braking position B is controlled by the actuating element 16 in such a way that the supply circuit 10 is not energized.Consequently, the lifting cylinder 21, designed as a braking element 7, is displaced in the lifting magnet 20 in braking position B in such a way that it engages in the receiving recess 22 of the guide roller 5' due to gravity and the spring force of the spring element 37. This prevents the guide roller 5' from rolling.

[0083] In the release position F, the lifting magnet 20 is energized and actuated. In other words, in the release position F, the brake actuator 13 is controlled by the actuating element 16 such that the supply circuit 10 is energized. The energized lifting magnet 20 displaces the lifting cylinder 21, designed as a braking element 7, such that it is arranged outside the receiving recess 22 against the force of gravity and the spring force of the spring element 37. When the lifting magnet 20 is actuated or energized, the lifting cylinder 21, designed as a braking element 7, is thus displaced by the latter such that it does not engage in the receiving recess 22. This enables the guide roller 5' to roll.

[0084] The motion detection device 19 continuously determines the speed of the track maintenance machine 8. If a predefined speed limit is exceeded, for example if the track maintenance machine 8 rolls downhill in an uncontrolled manner, the control unit 18 initiates automatic braking.

[0085] Figures 6 and 7 show the chassis 1 according to a second embodiment, wherein the brake actuator 13 is designed as an indirectly acting brake actuator. Structurally identical components have the same reference numerals as in the previous Figures 1 to 5.

[0086] A holding element 23 is detachably mounted on the bracket 3 by means of a screw-nut connection 24. The brake actuator 13 is arranged on the bracket 3 via the holding element 23, wherein the lifting magnet 20 is detachably arranged on an upper side 35 of the holding element 23 via a threaded connection 33. The lifting cylinder 21 is arranged displaceably within the lifting magnet 20. The lifting cylinder 21 is preloaded by means of the spring element 37. A pivoting element 28 is arranged on the holding element 23 via a pivot pin 27. The pivoting element 28 is pivotally mounted at its first end about a pivot axis 26 of the pivot pin 27. The pivoting element 28 is operatively connected at its opposite end to the lifting cylinder 21 of the lifting magnet 20.

[0087] The brake element 7 is arranged on an underside 36 of the holding element 23. The brake element 7 has a brake element guide 30 and a brake piston 29. The brake element guide 30 is arranged on the underside 36 of the holding element 23 via two nuts 31 and 31'. The brake element guide 30 serves to guide the brake piston 29. In other words, the brake piston 29 can be guided or displaced within the brake piston guide 30. In the present exemplary embodiment, the brake piston 29 serves to brake the guide roller 5', wherein the brake piston 29 engages in one of the recesses 22 to 22"' in braking position B in order to brake or lock the guide roller 5'.

[0088] The brake piston 29 is operatively connected to the pivoting element 28 via a connecting element 25. For this purpose, the pivoting element 28 has a groove 32 into which the connecting element 25 engages. Displacement of the lifting cylinder 21 by the lifting magnet 20 causes the pivoting element 28 to pivot about the pivot axis 26, thereby displacing the brake piston 29 within the brake piston guide 30.

[0089] In braking position B, the solenoid 20 is de-energized. In other words, the brake actuator 13 is controlled by the actuating element 16 such that the supply circuit 10 is de-energized. Consequently, in the braking position, the lifting cylinder 21 is displaced due to gravity and the spring force of the spring element 37 in the solenoid 20 such that the brake piston 29 engages the receiving recess 22 via the pivoting mechanism described above. This prevents the guide roller 5' from rolling.

[0090] In the release position F, the lifting magnet 20 is energized. In other words, the brake actuator 13 is controlled by the actuating element 16 such that the supply circuit 10 is energized. The energized lifting magnet 20 displaces the lifting cylinder 21 against the force of gravity and the spring force of the spring element 37 such that the brake piston 29 does not engage the receiving recess 22 via the pivoting mechanism described above. This enables the guide roller 5' to roll.

[0091] Figs. 8 and 9 show the chassis 1 according to a third embodiment, wherein the brake actuator 13 is preloaded. Structurally identical components have the same reference numerals as in the previous Figs. 1 to 7.

[0092] The brake actuator 13 has a housing 38, wherein the housing 38 is detachably arranged on the holder 3 via the fastening elements 39 and 39'. A motor 34 is arranged on the housing 38. The braking element 7 is displaceably arranged within the housing 38 and is preloaded in the direction of the guide roller 5' via a spring element 37. In other words, the braking element 7 is guidably mounted within the housing 38, wherein the braking element 7 is preloaded via the spring element 37 such that the braking element 7 engages in the receiving recess 22 of the guide roller 5'. The braking element 7 and the motor 34 are operatively connected to one another.

[0093] In braking position B, the motor 34 is de-energized and inactive. In other words, the brake actuator 13 is controlled by the actuating element 16 such that the supply circuit 10 is not energized. Consequently, the braking element 7 is preloaded in the housing by means of the spring element 37 such that the braking element 7 engages the receiving recess 22 in braking position B. This prevents the guide roller 5' from rolling.

[0094] In the release position F, the motor 34 is energized and active. In other words, the brake actuator 13 is controlled by the actuating element 16 such that the supply circuit 10 is energized. The energized motor 34 allows the brake element 7 to be displaced against the preload of the spring element 37 such that the brake element 7 does not engage the receiving recess 22. This enables the guide roller 5' to roll.

[0095] 10 and 11 show a track maintenance machine 8 with a maintenance device 4 and a chassis 1 according to a fourth exemplary embodiment. Structurally identical components have the same reference numerals as in the previous FIGS. 1 to 9. In the exemplary embodiment shown, the chassis 1 is designed as a monorail chassis, wherein the chassis 1 only has the holder 3'. Due to the design as a monorail chassis, the carrier 2 comprises a boom 47, wherein the boom 47 has a boom housing 49 with a support roller 50 at one boom end 48. The holder 3' is connected to the boom 47 below the maintenance device 4. This is particularly evident in FIG. 11.

[0096] The operating principle of the illustrated brake unit 6 is similar to the operating principle of the brake unit 6 described in Figs. 6 and 7, wherein the brake piston 29 is directly connected to the lifting cylinder 21 via the connecting element 25. The brake actuator 13 is formed integrally with the guide rail 3. The brake element 7 is arranged on the lifting magnet 20 of the brake actuator 13 via the holding element 23. In other words, the brake element 7 is arranged on the brake actuator 13 via the holding element 23 and thus on the bracket 3'.

[0097] In the illustrated embodiment, the braking element 7 and the brake actuator 13 are arranged horizontally or parallel to a rail longitudinal direction R in the direction of movement of the brake piston 29 or the lifting cylinder 21. The holder 3' defines a boundary plane E, wherein the braking unit 6 has a side 51 facing the boundary plane E, wherein the side 51 of the braking unit 6 extends at most up to the boundary plane E. This arrangement has the advantage that the radius of movement of the processing device 4 arranged on the chassis 1 is not restricted by the braking unit 6. In other words, a processing device 4 according to the illustrated embodiment has an increased radius of movement, since the braking unit 6 does not restrict the radius of movement due to the horizontal arrangement along a rail longitudinal direction R and below the boundary plane E.

[0098] Fig. 12 shows a sectional view of a track maintenance machine 8 with a maintenance device 4 and a chassis 1 according to a fifth exemplary embodiment. Structurally identical components have the same reference numerals as in the previous Figs. 1 to 11. In the illustrated exemplary embodiment, the chassis 1 has its own power supply unit 12' in the form of an accumulator. The power supply unit 12' is detachably arranged on the support 2. In the illustrated exemplary embodiment, the power supply unit 12' serves to supply the braking unit 6 with electrical energy. The power supply unit 12, in contrast, supplies the maintenance device 4 with electrical energy.

[0099] Furthermore, the processing device 4 has a base support 9, on which the processing unit 46 is arranged. The base support 9 serves to arrange the processing device 4 or the processing unit 46 on the chassis 1.

[0100] For arranging the processing device 4, the support 2 has a processing device connecting element 40, and the base support 9 has a chassis connecting element 41. The processing device connecting element 40 and the chassis connecting element 41 serve to detachably connect the base support 9 and thus the processing device 4 or the processing unit 46 to the chassis 1.

[0101] The processing device connecting element 40 is arranged on the carrier 2 and has further electrical connection contacts 14" and 14"'. The chassis connecting element 41 has a conductor bridge 45. The conductor bridge 45 serves to electrically connect the connection contacts 14" and 14"' when the processing device 4 is mounted on the chassis 1. In other words, the connection contacts 14" and 14"' are not electrically connected by the conductor bridge 45 in a basic position, i.e. in a position in which the processing device 4 is not mounted. Only after the processing device 4 has been mounted are the connection contacts 14 and 14' electrically connected to one another via the conductor bridge 45.

[0102] In the illustrated embodiment, the supply circuit 10 can therefore only be electrically closed by positioning the processing device 4 on the chassis 1. In other words, the control of the brake actuator 13 by the actuating element 16 is only possible when the processing device 4 is mounted or positioned, since the brake actuator 13 can only be supplied with electrical energy by the power supply unit 12' when the connection contacts 14" and 14"' are electrically connected.

[0103] Fig. 13 shows a front view of a track maintenance machine 8 with a maintenance device 4 and a chassis 1 according to a sixth embodiment. Structurally identical components have the same reference numerals as in the previous Figs. 1 to 12.

[0104] In the illustrated embodiment, the processing device 4 is designed as a rail lift, which comprises a braking unit 6 according to the invention or can be retrofitted with a braking unit 6 according to the invention. In the illustrated embodiment, the processing device 4 is fixedly arranged on the chassis 1. The processing device 4 or the rail lift is thus non-removably arranged on the support 2. In the illustrated embodiment, the braking element 7 is designed as an indirectly acting braking element. Regarding the structure and mode of operation of the indirectly acting braking element 7, reference is made to the description of the figures for Figs. 6 and 7.

[0105] The features of the individual embodiments can be combined in any way.

Claims

Patent claims 1. Chassis (1) for a manually displaceable track processing machine (8) with a support (2), a plurality of guide rollers (5, 5', 5", 5'") arranged on the support (2) for manually displacing the chassis (1) on rails (S) of a track (G), and a braking unit (6) for braking the chassis (1), characterized in that the braking unit (6) is electrically controllable.

2. Chassis (1) according to claim 1, characterized in that the braking unit (6) has a braking element (7) and a braking actuator (13) for actuating the braking element (7).

3. Chassis (1) according to claim 1 or 2, characterized in that the braking unit (6) is designed to act on at least one guide roller (5, 5', 5", 5'").

4. Chassis (1) according to at least one of the preceding claims, characterized in that the brake unit (6) has an electrical supply line (11) and electrical connection contacts (14, 14') for connecting the brake actuator (13) to a power supply unit (12).

5. Chassis (1) according to at least one of the preceding claims, characterized in that the brake unit (6) has a switching element (15) for interrupting and closing a supply circuit (10) for a brake actuator (13).

6. Chassis (1) according to at least one of the preceding claims, characterized in that that the brake unit (6) has an actuating element (16) for controlling a brake actuator (13).

7. Chassis (1) according to at least one of the preceding claims, characterized in that the braking unit (6) is designed such that a braking element (7) is in a braking position (B) in an unactuated state of an actuating element (16) and that the braking element (7) is in a release position (F) in an actuated state of the actuating element (16).

8. Chassis (1) according to at least one of the preceding claims, characterized by an energy supply unit (12) for supplying a brake actuator (13) with energy.

9. Chassis (1) according to at least one of the preceding claims, characterized by a control unit (18) for controlling and / or monitoring the braking unit (6).

10. Chassis (1) according to at least one of the preceding claims, characterized by a movement detection unit (19) for detecting a movement of the chassis (1).

11. Chassis (1) according to at least one of the preceding claims, characterized in that the braking unit (6) can be automatically controlled by a control unit (18), in particular after a predefined time interval has elapsed and / or when the chassis (1) is moved at least at one predefined speed and / or when the chassis (1) is moved at least at one predefined acceleration.

12. Chassis (1) according to at least one of the preceding claims, characterized by a processing device connecting element (40) for releasably connecting a processing device (4) to the chassis (1).

13. Track processing machine (8) for processing tracks with a chassis (1) according to at least one of the preceding claims, a processing device (4) arranged on the chassis (1), and at least one handle (17) for manually moving the track processing machine (8).

14. Track processing machine (8) according to claim 13, characterized in that the processing device (4) comprises a base support (9) and a processing unit (46) arranged thereon.

15. Track processing machine (8) according to claim 13 or 14, characterized in that the processing device (4) comprises a chassis connecting element (41) for interacting with a processing device connecting element (40), wherein the chassis connecting element (41) has a conductor bridge for at least partially closing a supply circuit (10).

16. Track processing machine (8) according to at least one of claims 13 to 15, characterized in that the actuating element (16) is arranged on the at least one handle (17).

17. Procedure for working on a track with the steps: Providing a track processing machine (8) according to at least one of claims 13 to 16, Positioning the track processing machine (8) on rails of the track, with the chassis (1) in a braking position, Transferring the brake unit (6) from the braking position to a release position, and Processing the track using the processing device (4) and manually moving the track processing machine (8) on the rails.

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