Holding device for angle grinder

Abstract

A holding device (1) for an angle grinder, comprising a frame (2) with a first segment (3) and a second segment (4), wherein, on its underside, the first segment (3) has two running rollers (9, 10), which are arranged one behind the other and are designed to run on a rail or in a groove of a rail, wherein the second segment (4) is arranged at a distance from the first segment (3), wherein the second segment (4) is connected to a receiving device (12) for an angle grinder via a connecting element (11), wherein the receiving device (12) is designed to be height-adjustable and / or pivotable.

Description

[0001] Maik Bartel 251036 WO for angle grinders

[0002] The present invention relates to a holding device for an angle grinder, in particular for holding an angle grinder when grinding railway tracks.

[0003] Railway tracks have a specially shaped profile that ensures the smooth operation of trains. Typically, the rails have a slightly curved top and vertical sides. In addition, there are grooved rails, which are primarily used in tramway systems. Unlike conventional rails, grooved rails have a groove running alongside the running surface. This groove provides clearance for the wheel flange of the tram, while the road surface often connects seamlessly to the rail.

[0004] For safety reasons, rails should be ground regularly to compensate for wear and tear and restore their original profile. The weight of the trains can cause wear, which can manifest itself, for example, as an edge or lip on one side of the rails.

[0005] Furthermore, railway tracks are typically manufactured in specific lengths. To create a continuous rail, two rail ends must be joined. Welding processes are most commonly used for this purpose, with thermite welding being the most prevalent. Thermite welding is a process involving an aluminothermic reaction between aluminum powder and iron(II) oxide, where the aluminum powder reduces the iron(II) oxide to iron. The reaction is extremely exothermic and requires no external heat or power source to weld the ends of the two adjacent rails together with molten iron.

[0006] In thermite welding, the rail ends are cleaned, aligned flat, and spaced at a specific distance. This spacing between the rail ends ensures consistent results when pouring the molten steel into the welding mold. A two- or three-part mold made of hardened sand is clamped around the rail ends, and a torch with suitable heat capacity is used to preheat the rail ends and the inside of the mold. The correct amount of thermite mixed with alloying metal is placed in a refractory crucible, and when the rails have reached a sufficient temperature, the thermite is ignited, completing the reaction so that the alloying metal melts and mixes completely, producing the desired molten steel or alloy. The molten steel flows into the mold, fuses with the rail ends, and forms the weld.

[0007] After the thermite welding process is complete, the mold is removed and the weld is hot-chiseled and ground to create a smooth joint.

[0008] Especially with grooved rails, the grooves must be painstakingly manually machined with an angle grinder or at least reworked after welding two rail pieces together in order to eliminate all irregularities.

[0009] Grinding machines are well-known for performing rough grinding work. However, manual finishing with a hand-held grinding tool, such as an angle grinder, remains necessary. A disadvantage is that grinding by hand with such a tool is physically demanding and requires an unhealthy posture, leading to significant physical strain.

[0010] The object of the invention is to overcome the disadvantages known from the prior art. One of the objects of the invention can therefore be considered to be to facilitate the grinding of the rails.

[0011] To solve the problem, a holding device for an angle grinder is provided, wherein the holding device comprises a frame with a first segment and a second segment, the first segment having two rollers arranged one behind the other on its underside, which are designed to run on a rail or in a groove of a rail, the second segment being arranged at a distance from the first segment, the second segment being connected via a connecting element to a mounting device for an angle grinder, the mounting device being height-adjustable and / or pivotable. With the aid of the holding device according to the invention, a user can perform grinding work much more flexibly and easily, thus overcoming the problems of grinding rails or track sections.The holding device can accommodate and guide hand-held grinding tools such as angle grinders without causing physical strain for the user. The device allows the user to work while standing, thus eliminating the need for unhealthy postures. Furthermore, it is advantageous that the holding device allows the use of standard hand-held grinding tools.

[0012] The rollers of the first segment enable the movement of the holding device along the rail during grinding.

[0013] The first and second segments can be connected by one or more connecting struts, such as metal beams. In plan view, the first segment, the second segment, and the connecting struts can form a quadrilateral shape. The first and second segments can each comprise metal tubes. Preferably, the cross-section of the metal tubes is round or rectangular.

[0014] The connecting element joins the second segment to the receiving device. Preferably, the longitudinal axes of the connecting element and the second segment are arranged parallel to each other. The connecting element is preferably in the form of a strip or bar. However, the connecting element can also be a metal tube.

[0015] The mounting device is designed to be height-adjustable and / or swiveling. This allows a hand-held grinding tool positioned within the mounting device to reach and grind the entire groove, including the groove bottom and side walls. The mounting device can therefore be swiveled and adjusted in height independently of the first segment.

[0016] The rollers can be spaced apart from each other. Preferably, the rollers are arranged at both ends of the first segment. The rollers serve to easily move the holding device along the rail and to position it independently of the second segment.

[0017] In an advantageous embodiment of the invention, the second segment is arranged at a distance from a plane defined by the two rollers. This arrangement allows the receiving device to be positioned such that a grinding tool, such as an angle grinder, held by the receiving device is located directly above the groove. Preferably, the receiving device extends from the connecting element towards the first segment. Therefore, in a top view, the receiving device can be positioned at least partially between the first and second segments. Furthermore, the receiving device can be pivoted so that a grinding tool attached to the receiving device can reach any point on the rail to be ground, preferably the groove, within this area of ​​the rail.

[0018] Preferably, the holding device comprises a first handle arranged on the first segment. The handle on the first segment makes it significantly easier for a user to hold the device firmly and move it along the rail. The first handle thus serves, in particular, to align or fix the first segment of the holding device.

[0019] Preferably, the holding device includes a second handle designed to adjust the height and / or swivel the receiving device. The second handle therefore facilitates the handling of the height adjustment of the receiving device.

[0020] In a preferred embodiment of the present invention, the second handle of the holding device is arranged on the connecting element that is connected to the second segment. The vertical and / or pivotable adjustment of the second handle allows the receiving device to be vertically adjusted and / or pivoted, so that an angle grinder located in the receiving device can easily reach any point on the rail or the groove of the rail to be ground.

[0021] Preferably, the lengths of the first handle and / or the second handle are adjustable. The handles can therefore be designed to be height-adjustable. This allows the user to adjust the handle length to their height and work in an ergonomically sound posture.

[0022] In a preferred embodiment of the present invention, the second segment is pivotable, and the receiving device can be pivoted by pivoting the second segment. This enables flexible movement in which the entire second segment—and thus also the associated receiving device—can be pivoted relative to the first segment. This pivoting movement offers a particularly advantageous way to adjust the position and orientation of the receiving device.

[0023] The second segment is preferably mounted by means of one or more pivot bearings, which enables the pivoting movement. The pivot bearings can be formed by bolts that engage from the outside into the second segment, in particular into a tube of the second segment. These bolts are preferably positioned so that they guide the second segment stably and securely, while at the same time allowing a controlled pivoting movement.

[0024] The second segment can be designed as a tube that is pivotally mounted. Preferably, the second segment is equipped with rotary bearings at both ends. This arrangement ensures that the second segment can be pivoted smoothly and in a controlled manner.

[0025] In a preferred embodiment of the present invention, the pivot axis of the second segment runs parallel to the plane spanned by the two rollers.

[0026] Preferably, the connecting element is designed to be hinged, and is preferably connected to the second segment by means of a hinge. Such a connection of the connecting element to the second segment allows the height of the mounting device, and thus of an angle grinder, to be varied by simply raising or lowering the connecting element.

[0027] Preferably, the mounting device for the angle grinder is U-shaped. The mounting device may have fastening elements, preferably at least one elongated hole and / or at least one bolt. The at least one bolt is preferably designed to be guided from the outside through an elongated hole and connected to the grinding tool. For this purpose, the end of the bolt intended to connect to the grinding tool may have a thread that can be screwed into a corresponding thread on the grinding tool. This design allows the grinding tool to be easily attached to the U-shaped mounting device. Furthermore, the fastening elements, in particular the at least one elongated hole and / or the at least one bolt, allow for fine adjustment of the angle grinder's position.

[0028] The opening of the U-shaped receiving device can be oriented towards the first segment.

[0029] Preferably, the holding device and / or the connecting element is spring-mounted. For example, a spring can be arranged with one end on the frame of the holding device and with the other end on the connecting element. The spring can thus assist in lifting the holding device and the angle grinder upwards, relieving strain on the user. For example, a tension spring can be used, connected to the frame above the connecting element and to the connecting element itself. Alternatively or additionally, a compression spring can be used, connected to the frame below the connecting element and to the connecting element itself.

[0030] Preferably, the holding device includes a hook element for suspending the mounting device or an angle grinder attached to the mounting device. The hook element is preferably arranged on the first segment. The hook element can be used to suspend the mounting device or the angle grinder during a grinding break.

[0031] In a preferred embodiment, the holding device comprises a flexible protective shield, preferably in the form of a chain curtain, wherein the flexible protective shield is preferably arranged at one end of the holding device. The protective shield can prevent sparks or splinters generated during grinding from flying onto the user's clothing or skin. The chain curtain design ensures sufficient flexibility of the protective shield when the holding device is moved and / or tilted.

[0032] The present invention will be explained in more detail below with reference to Figures 1 to 3.

[0033] Fig. 1 shows an exemplary embodiment of a holding device 1 with a frame 2 comprising a first segment 3. The frame 2 also has a second segment 4, which runs parallel to the first segment 3 but is laterally offset and positioned lower than the first segment 3. The second segment 4 is connected to the first segment 3 via connecting struts 5, 6. The connecting struts 5, 6 thus extend obliquely downwards from the first segment and are connected to the second segment 4 via two pivot bearings 7, 8. The second segment 4 is therefore pivotable, with the axis of rotation running parallel to the first segment 3. The first segment 3 comprises two rollers 9, 10, which are further arranged below the first segment. A first handle 13 is arranged on the upper side of the first segment 3. The first segment 3 thus lies in a plane defined by the two rollers 9, 10.A connecting element 11 is connected to the second segment 4 by means of a hinge. In Fig. 1, the connecting element 11 rests directly on the second segment 4. A receiving device 12 is provided on the connecting element 11, which is designed to receive and secure a grinding tool, in particular an angle grinder. Additionally, a second handle 14 is located on the connecting element 11, with which the connecting element 11 can be lifted, thereby also lifting the receiving device 12 and any grinding tool that may be located therein. A possible grinding tool is shown schematically in Fig. 1 by dashed lines.

[0034] Fig. 2 shows the holding device 1 from Fig. 1, in which the connecting element 11 was lifted by means of the second handle 14.

[0035] Fig. 3 shows an exemplary embodiment of a holding device 1 in a view from the direction of the extended longitudinal axis of the holding device. A rail with a groove in which the running wheels 9 run is schematically represented by dashed lines. By tilting the first segment 3 (in this view to the left or right) with the first handle 13, pivoting the second segment 4 with the second handle 14, and raising or lowering the receiving device 12 with the second handle 14, every area of ​​the rail groove can be reached by a grinding device arranged in the receiving device 12.

[0036] Reference symbol list

[0037] 1) Holding device

[0038] 2) Frame

[0039] 3) First segment

[0040] 4) Second segment

[0041] 5) Connecting strut

[0042] 6) Connecting strut

[0043] 7) Swivel bearing

[0044] 8) Swivel bearing

[0045] 9) Roller

[0046] 10) Roller

[0047] 11) Connecting element

[0048] 12) Recording device

[0049] 13) First grip

[0050] 14) Second grip

Claims

1. Holding device (1) for an angle grinder comprising a frame (2) with a first segment (3) and a second segment (4), - wherein the first segment (3) has on its underside two rollers (9, 10) arranged one behind the other, which are designed to run on a rail or in a groove of a rail, - wherein the second segment (4) is spaced apart from the first segment (3), - wherein the second segment (4) is connected via a connecting element (11) to a receiving device (12) for an angle grinder, wherein the receiving device (12) is designed to be height-adjustable and / or pivotable.

2. Holding device (1) according to claim 1, wherein the second segment (4) is arranged spaced apart from a plane which is spanned by the two rollers (9, 10).

3. Holding device (1) according to claim 1 or 2, wherein the holding device (1) comprises a first handle (13) arranged on the first segment (3).

4. Holding device (1) according to one of claims 1 to 3, wherein the holding device (1) comprises a second handle (14) which is configured to adjust the height and / or pivot the receiving device (12).

5. Holding device (1) according to claim 4, wherein the second handle (14) is arranged on the connecting element (11) connected to the second segment (4).

6. Holding device (1) according to one of claims 1 to 5, wherein the lengths of the first handle (13) and / or the second handle (14) are adjustable.

7. Holding device (1) according to one of claims 1 to 6, wherein the second segment (4) is designed to pivot and the receiving device (12) is pivoted by pivoting the second segment (4).

8. Holding device (1) according to one of claims 1 to 7, wherein the pivot axis of the second segment (4) runs parallel to the plane spanned by the two rollers (9, 10).

9. Holding device (1) according to one of claims 1 to 8, wherein the connecting element (11) is designed to be foldable, preferably wherein the connecting element (11) is connected to the second segment (4) by means of a hinge.

10. Holding device (1) according to one of claims 1 to 9, wherein the receiving device (12) is U-shaped and / or wherein the receiving device (12) has fastening elements, preferably at least one elongated hole and / or at least one bolt.

11. Holding device (1) according to one of claims 1 to 10, wherein the receiving device (12) and / or the connecting element (11) are resiliently mounted.

12. Holding device (1) according to one of claims 1 to 11, comprising a hook element for suspending the receiving device (12) or an angle grinder attached in the receiving device (12), wherein the hook element is preferably arranged on the first segment (3).

13. Holding device (1) according to one of claims 1 to 12, wherein the holding device (1) has a flexible protective screen, preferably in the form of a chain curtain, preferably wherein the flexible protective screen is arranged at one end of the holding device (1).

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