Switch block for the control device of the work machine and contact unit for the work machine

Abstract

This invention relates to a switch block for a control device of a machine. The switch block has an adapter with connection areas on opposite sides. A first connection area is used for fixing to a mechanical operating unit. A first contact carrier of a contact unit is indirectly or directly fixed to a second connection area. The contact unit carries at least one electrical switch contact. The first contact carrier has two sidewalls. The first sidewall has a centering receiving portion, and the second sidewall has a protrusion. The adapter and / or the second contact carrier abuts against the sidewall of the first contact carrier, such that at least one protrusion of the second sidewall of the first contact carrier engages with the centering receiving portion of the first sidewall of the second contact carrier or the adapter arranged in sequence, and / or such that the protrusion of the second sidewall of the second contact carrier and / or the protrusion of the adapter arranged in sequence engages with the centering receiving portion of the first sidewall of the first contact carrier, thereby enabling precise transmission of mechanical switching movements to the contact unit.

Description

Technical Field

[0001] The present invention relates to a switch block for a control device of a machine, the switch block having an adapter having connection areas on opposite sides, wherein a first connection area is for fixing to the operating unit of the machine, wherein a first contact carrier of a contact unit is indirectly or directly fixed to a second connection area, the contact unit carrying at least one electrical switch contact, and wherein the first contact carrier has two sidewalls, the two sidewalls including outer sides facing away from each other.

[0002] The present invention also relates to a contact unit of a switch block for an operating unit of a work machine, the contact unit carrying at least one electrical switch contact, wherein the contact carrier of the contact unit has two sidewalls, the two sidewalls including outer sides facing away from each other, the outer sides forming a sequential arrangement side and the outer sides being arranged spaced apart from each other along the sequential arrangement direction, and wherein a longitudinal intermediate plane is formed between the outer sides, the longitudinal intermediate plane being parallel to the outer sides. Background Technology

[0003] Control devices for work machines, such as construction machinery or cranes, are known from existing technology. These control devices are also called gearshift levers and are used to control the functions of the work machine.

[0004] This control device typically has an operating unit, which includes a mechanical operating mechanism. An operating lever is fixed to the mechanical operating mechanism and has a handle. The user can pre-determine the movement of the machine using the handle. Operating the handle moves the pivotally supported operating unit. One or more switch blocks are mechanically coupled to the operating unit. The switch blocks are mounted laterally to the operating unit and include at least one contact unit. A switch contact is housed in the contact unit. When the operating unit is operated, the switch contact and the current circuit of the machine close to control the function. The switch contact is typically actuated via a camshaft, which is driven by the operating unit. Commonly, multiple contact units are arranged sequentially. The contact units are then driven via a common camshaft. Summary of the Invention

[0005] The object of the present invention is to provide a switch block or contact unit that enables the precise transmission of mechanical switching motion to the contact unit.

[0006] The objective of the present invention regarding the switch block is achieved by the following manner: a first sidewall of the contact carrier has one or more centering receiving portions, and a second sidewall has one or more protrusions, such that an adapter and / or second contact carriers arranged sequentially on the first contact carrier in a sequential arrangement direction abut against a sidewall of the first contact carrier, such that at least one protrusion of the second sidewall of the first contact carrier engages in the centering receiving portion of the first sidewall of the sequentially arranged second contact carriers or in the centering receiving portion of the sequentially arranged adapters, and / or such that the protrusion of the second sidewall of the sequentially arranged second contact carriers and / or the protrusion of the adapters engage in the centering receiving portion of the first sidewall of the first contact carrier.

[0007] Therefore, according to the present invention, the contact unit, with its contact carrier, can be mounted to the operating unit via an adapter, and the contact unit can be precisely oriented on the adapter via a protrusion, a fastening protrusion, or a fastening receptacle. For example, if the adapter has a protrusion, the protrusion engages in the fastening receptacle of the adapter, thereby precisely oriented the contact carrier relative to the adapter. If another contact unit is mounted on the first contact unit, the two contact units can also be precisely oriented relative to each other. For this purpose, the fastening protrusion of the contact carrier engages in a suitable centering receptacle of the adjacent contact carrier. Thus, the two contact units are precisely oriented relative to each other. At this time, if a preset adjustment movement is made by means of the operating unit, for example via a camshaft, the adjustment movement is precisely transmitted to one or more contact units. This achieves more precise contact control. Furthermore, installation is simplified because the adapter and the contact unit can be easily and precisely engaged with each other via protrusions, fastening protrusions, or fastening receptacles. The components can then be fixedly coupled to each other, for example by means of screws or similar retaining elements.

[0008] The precise matching and orientation of the components can be achieved by providing at least two centering receiving portions on the outer side of the first sidewall introduced into the contact carrier and at least two protrusions protruding from the outer side of the second sidewall. This also provides resistance to torsion between the components. For example, the components can, on the one hand, be form-locked to each other transversely to the sequential arrangement direction. On the other hand, it also prevents the two components from torsion relative to each other in a plane perpendicular to the sequential arrangement direction and perpendicular to the rotation axis of the operating axis, preferably the camshaft.

[0009] According to the invention, the first and second contact carriers can be configured to have identical structures at least in the regions having the centering receiving portion and the protrusion. This reduces component costs and installation expenses. The identical structure allows the contact carriers to be easily arranged sequentially. Particularly preferably, the contact carriers are configured to have identical structures.

[0010] According to the invention, in addition to at least one centering receiving portion on the first sidewall of the contact carrier or sequentially arranged contact carriers, a fastening protrusion is also provided. The fastening protrusion protrudes from the outside of the first sidewall, and a fastening receiving portion is machined into the outside of the second sidewall of the contact carrier. In the installed state, the fastening protrusion engages with the fastening receiving portion of the sequentially arranged contact carriers or adapter. This achieves an engagement geometry between the sequentially arranged contact carriers, which provides further shape-locking stability of the connecting plane.

[0011] Here, if it is further configured such that, in addition to at least one centering receiving portion of the first sidewall of the contact carrier or sequentially arranged contact carriers, a fastening protrusion is provided with a cross-sectional geometry different from that of the centering receiving portion; and / or, in addition to at least one protrusion of the second sidewall of the contact carrier or sequentially arranged contact carriers, a fastening receiving portion is provided with a cross-sectional geometry different from that of the protrusion, then the precise correspondence of the relative positions of the contact carriers to each other is further improved by the different cross-sectional geometries.

[0012] To form a stable contact carrier, two spaced-apart sidewalls can be connected by two sidewalls extending in a sequential direction and a bottom. The sidewalls absorb clamping forces that occur when the contact carrier is pulled closer to each other in the sequential direction or pulled relative to the adapter by means of a clamping device, such as at least one clamping screw.

[0013] According to another variation of the invention, the sidewalls may be configured such that the recesses are aligned with each other and are used to allow the cam tube to pass through.

[0014] A particularly preferred variant of the invention is that the contact unit has a contact carrier and a housing component, which are connected to each other, preferably engaged, and together surround a receiving space in which at least one electrical switch contact and a rotatably arranged cam disk are arranged. Thus, the contact unit forms a closed housing, in which the electrical switch contact is fixedly mounted.

[0015] If such a switch block is further configured such that the connection between the housing and the contact carrier is detachable laterally in the sequential arrangement direction, the housing can be removed from the contact carrier for maintenance without disassembling the contact carrier.

[0016] The objective of this invention is also achieved by means of a contact unit for a switch block of an operating unit. The contact unit is characterized by a first sidewall having one or more centering receptacles, and a second sidewall having one or more protrusions, wherein the centering receptacles are arranged symmetrically with respect to the protrusions about a central transverse plane, and the protrusions are configured such that their outer contour is smaller than or equal to the inner contour of the centering receptacles. This design achieves the aforementioned advantages, allowing multiple contact units to be arranged sequentially. Correspondingly, mechanical ports are provided on the sidewalls, enabling the contact carriers to be arranged in a precisely matched sequence.

[0017] A particularly preferred variant of the invention includes at least two centering receiving portions introduced into the outer side of the first sidewall of the contact carrier and at least two protrusions extending from the outer sidewall of the second sidewall. The centering receiving portions are arranged symmetrically with respect to their corresponding protrusions about a central transverse plane, and the protrusions are configured such that their outer contours are smaller than or equal to the inner contours of their corresponding centering receiving portions. Mechanical ports on the two sidewalls here achieve anti-torsional correspondence between the two contact carriers transverse to the sequential arrangement direction. Furthermore, a form-locking fastening is achieved between the sequentially arranged contact carriers in a direction transverse to the sequential arrangement direction.

[0018] For other advantages described in dependent claims 13 to 17, see the foregoing embodiments. Attached Figure Description

[0019] Figure 1 A perspective view of the control device for the work machine is shown.

[0020] Figure 2 It shows the basis from different perspectives Figure 1 A schematic diagram,

[0021] Figure 3 It shows that according to Figure 1 A perspective view of the components of the control device, including the control lever.

[0022] Figure 4 It shows that according to Figure 1 Another component of the control device, including according to Figure 3 Components,

[0023] Figure 5 It shows that according to Figure 4 The components are in the modified installation location.

[0024] Figure 6 It shows Figure 1 The detailed view in the image is a perspective view from below.

[0025] Figure 7 It shows the method for installation to according to Figure 1The electrical switch unit of the control device

[0026] Figure 8 It shows that according to Figure 7 An exploded view of the electrical switch unit.

[0027] Figure 9 and Figure 10 It shows that according to Figure 7 and Figure 8 A 3D view of the adapter for the switching unit, and

[0028] Figure 11 and Figure 12 It shows that according to Figure 7 and Figure 8 A three-dimensional view of the contact carrier of the switching unit. Detailed Implementation

[0029] Figure 1 and Figure 2 A control device for an Arbeitsmaschine is shown, the control device having a carrier 10, which is preferably constructed as a single piece and particularly preferably made of zinc die casting.

[0030] The carrier 10 has a base component 11, which forms a through portion 11.1. Four supports 12 are projectingly mounted on the base component 11. In particular, the supports 12 are molded onto the base component 11 in one piece. Each support 12 has two support surfaces 12.1 and 12.2, which are arranged at an angle to each other, preferably at right angles. Figure 2 As can be seen, the two support surfaces 12.1 and 12.2 can be connected, for example, on the outer edge of the bracket 12.

[0031] The operating unit 40 can be fixed on the carrier 10. The operating unit 40 is referred to below. Figures 3 to 5 A detailed explanation is required. For example... Figure 3 As shown, the operating unit 40 has a coupling element 53. The coupling element 53 has a receiving portion 54. An operating lever 50 can be fixed on or within the receiving portion 54. The operating lever 50 has a connecting section 52 adjacent to the receiving portion 54, which transitions into a fixing member 51. A handle knob can be fixed on the fixing member 51. The operating lever 50 can be bonded or screwed to the coupling element 53.

[0032] The coupling element 53 has two bearing protrusions 55 on opposite sides. The bearing protrusions can be molded onto the coupling element 53 in one piece.

[0033] like Figure 4 As can be seen, the first operating unit 60 is pushed onto the coupling element 53. The first operating unit 60 has a bridging portion 61 that surrounds a receiving portion for coupling element 53. Within the receiving portion, according to... Figure 4The coupling element 53 is inserted from below in the drawing. Here, the bearing protrusion 55 engages in the recess of the bridging portion 61. The bridging portion 61 has two spaced-apart guide surfaces 66 in the receiving area, between which the coupling element 53 is received. If the coupling element 53 moves (e.g., due to operation on the operating lever 50), the coupling element 53 pivots about the pivot axis formed by the two bearing protrusions 55. Here, the coupling element 53 is guided on the two guide surfaces 66.

[0034] Drive units 62 are molded on opposite sides of the bridging portion 61. Each drive unit 62 has teeth 63, such as... Figure 4 The configuration can be arc-shaped. In the region of the free end of the drive unit 62, the bolt 64.1 is pressed into the hole of the drive unit 62 or screwed into the threaded receiving portion. A support bearing 64, in the form of a rolling element, is pushed onto the bolt 61. The support bearing 64 is rotatable onto the bolt 64. The support bearing 64 is secured by a retaining element 65, such as a retaining ring.

[0035] Figure 4 As can be seen, screw receiving portions 67 are introduced into the bridging portion 61. Two screw receiving portions 67 are provided on each side of the bridging portion 61, and the two screw receiving portions are adjacent to the bearing protrusion 55. The bearing protrusion 55 extends beyond the bridging portion 61 by a certain distance. Therefore, as... Figure 5 As can be seen, the bearing plate 90 is pushed onto the bearing protrusion 55 via the bearing hole, thereby forming a pivot support for the coupling element 53. The bearing plate 90 is secured by a fixing screw 91, which passes through the screw receiving portion of the bearing plate 90 and screws into the screw receiving portion 67 of the bridging portion 61.

[0036] Figure 4 It is also shown that the second control unit 70 can be pushed onto the first control unit 60 from above.

[0037] The second operating unit 70 has a connector 71 that connects the two drive units 73 to each other. The connector 71 has an arc-shaped slot that defines a guide surface 72 on its side. The second operating unit 70 can be threaded onto the operating lever 50 via the slot.

[0038] The connector 71 carries two drive units 73 as described above, wherein the drive units 73 are preferably connected to the connector 71 in a single piece. The two drive units 73 also have teeth 74, which are preferably designed to be arc-shaped, such as... Figure 4 As shown. Similar to the first operating unit 60, bolts 75.1 are also pressed or screwed into the holes of the drive unit 73 on the second operating unit 70. Bolts 75.1 respectively support the support bearings 75. The support bearings 75 are constructed identically to the support bearings 64 and are fixed to the bolts 75.1 by means of fixing elements 76.

[0039] The four support bearings 64 and 75 may be made of brass or a brass alloy, for example.

[0040] A hole receiving portion 77 is provided in the transition region between the drive unit 73 and the connector 71. The longitudinal center axes of the two hole receiving portions 77 are aligned with each other. Figure 4 It can be seen that the first operating unit 60 has a hole receiving portion 68 on the opposite side, and the hole receiving portions 68 are also aligned with each other.

[0041] In order to install Figure 4 The operating unit 40 shown is positioned within the through portion 11.1 of the base member 11. Here, the aforementioned hole receiving portions 68 and 77 are aligned with the threaded receiving portion of the base member 11. A bearing element 14 can be screwed into this threaded receiving portion. The bearing element 14 has a threaded section on which a tool receiving portion, particularly a Torx tool receiving portion, is integrally molded. The bearing element 14 has an integrally molded bearing pin aligned with the threaded section. When the bearing element 14 is screwed into the threaded receiving portion of the base member 11 with its threaded section, the bearing pin is forced into the corresponding hole receiving portions 68 and 77 of the first operating unit 60 or the second operating unit 70. The bearing element 14 is screwed in this manner from all sides of the base member 11. The bearing element 14 can be secured by nuts 15 and 16, which are screwed onto the threaded section of the bearing element 14 and clamped relative to the base member 11. Therefore, the first operating unit 60 and the second operating unit 70 are pivotally held on the base member 11 about their respective axes. The axis around which the first operating unit 60 can pivot is perpendicular to the axis around which the second operating unit 70 can pivot. Furthermore, the two pivot axes are in planes that are parallel to each other or exactly the same. This forms a universal joint. For simplified installation, the second operating unit 70 is first constructed into the carrier 10. Then, it can be mounted from below according to… Figure 3 The structural unit, together with the first operating unit 60, is pushed into the carrier 10 from below. Here, the operating lever 50 enters the gap formed between the guide surfaces 72.

[0042] like Figure 1 As can be seen, the slider 80 is pushed onto the operating lever 50. The slider 80 has a hole for this purpose, which surrounds the operating lever 50 in the connecting section 52. The slider 80 is pushed onto the coupling element 53, thereby positioning the slider between the two guide surfaces 72 of the second operating unit 70. As the operating lever 50 moves, the slider 80 slides on an arcuate track between the two guide surfaces 72.

[0043] Figure 1As can be seen, two clamping rods 20 are pivotally supported on the bracket 12 of the carrier 10. Each clamping rod 20 has two arms 21 and 22, which are respectively connected to the bearing housing 24 of the clamping rod 20. Figure 6 The bearing housing 24 can be seen in the figure. As shown, the bearing housing 24 is open to the side facing the clamping rod 20.

[0044] Figure 6 It is also shown that the clamping rod 20 is connected to the bracket 12 via a bearing member 13. The bearing member 13 has a bearing bolt. The bearing bolt is pressed into a hole in the bracket 12. The bearing member 13 also has a head 13.1. In the installed state, there is a gap between the bearing member 13 and the inner surface of the bracket 12. Between this inner surface and the underside of the head 13.1, the clamping rod 20 is pushed onto the bearing member 13 from the side. Thus, a swing bearing is formed by the bearing bolt and the bearing receiving portion 24 of the bearing member 13.

[0045] like Figure 6 As shown, guide surfaces 23 are molded on the lever arm 22. Clamping rods 20, fixed to adjacent brackets 12, are positioned on opposite sides of support bearings 64 or 75. In this way, all four support bearings 64, 75 between every two clamping rods are protected.

[0046] The clamping rod 20 can be clamped by the clamping device 30, so that the guide surface 23 is in contact with the support bearings 64 and 75 under spring preload.

[0047] The clamping device 30 has two coupling elements 31, each of which is supported on a bolt 33 of the clamping rod 20. A clamping spring 32, in the form of a compression spring, functions between the two coupling elements 31. The clamping spring 32 clamps the coupling elements 31 onto the two bolts 33. In this way, force is introduced via the bolts 33 into the lever arm 21 of the clamping rod 20. This force is transferred to a second lever arm 22, which is then elastically preloaded against a support bearing 64 or 75. The drawing shows the clamping device holding the operating unit 40 in a neutral position within its intermediate position.

[0048] According to the invention, the support bearings 64 and 75 are made of a metal with a lower hardness than the clamping rod 20. Preferably, the clamping rod 20 is made of stainless steel, and the support bearings 64 and 75 are made of brass or a brass alloy. The coupling element 31 is preferably made of the same material as the clamping rod 20.

[0049] If the lever 50 moves, the first control unit 60 and the second control unit 70 pivot according to the direction of movement of the lever 50. The movement of the control units 60 and 70 also causes the drive units 62 and 73 to move out of their neutral positions shown in the drawings. For example, in... Figure 6As shown, when the rear drive unit 62 pivots to the left in the drawing plane, the arm 22 of the left clamping rod 20 pivots counterclockwise, and the arm 22 of the right clamping rod 20 also follows counterclockwise to the left, so that the guide surfaces 23 of the two clamping rods 20 remain in contact with the support bearing 64.

[0050] If the user releases the operating lever 50, the clamping device 30 causes the drive units 62 and 73 to return to the neutral position via the clamping 20 and the support bearings 64 and 75.

[0051] exist Figures 7 to 9 The document describes a switch block, which can be installed according to... Figures 1 to 6 The switch block is mounted on the operating unit 40. In particular, such a switch block can be mounted on each of the four sides of the operating unit 40 on the bracket 12. The structure and function of the switch block are described in detail below.

[0052] like Figure 1 As shown, the switch block has an adapter 110, on which contact units with contact carriers 130 are arranged sequentially. A closure member 170 is mounted on the last contact unit in the contact unit arrangement, opposite to the adapter 110. The switch block is closed by means of a connector 200, opposite to the closure member.

[0053] exist Figure 8 The exploded view of the switch block is shown in detail. (Reference) Figure 9 and Figure 10 First, the structure of adapter 110 is described.

[0054] As shown in the drawing, the adapter 110 can be configured as a flat plate. The adapter has a first connection area 111. The connection area 111 can have a flat connection surface. A screw receiver 112 passes through the connection area 111, and an electrical wire can be fixed on the screw receiver.

[0055] Orienting elements 113.1 and 113.2 protrude from the outer side of the connecting region 111. A recess 115 is recessed in the connecting side forming the connecting region 111.

[0056] An arch 115.1 with a screw receiver is arranged in the area of ​​the recess 115. The recess 115 is defined on the side by a gasket 115.3, which at least partially surrounds the recess.

[0057] Electrical structural units, particularly potentiometers of different structures, can be installed in the connection area 111. Accordingly, the adapter 110 forms a universal component for accommodating different electrical structural units. For example, an electrical structural unit may be placed on the flat surface of the connection area with a flat connecting surface and precisely oriented on the directional elements 113.1 and 113.2. It is also conceivable to use multiple electrical structural units, each having a perfectly circular connecting area. The connecting area allows the electrical structural unit to be placed on a pad 115.3. The electrical structural unit can also be supported on the dome 115.1 and precisely positioned. It can be secured via screw receptacles in the dome 115.1.

[0058] Figure 9 and Figure 10 It can also be seen that the adapter 110 has a screw receiving portion 115.4, through which the screw receiving portion passes. In addition, a through portion 115.2 is also provided on the adapter 110.

[0059] Figure 9 The rear side of adapter 110 is visible. As shown in the drawing, adapter 110 forms a second connection region 116 on the rear side. The second connection region 116 forms a sequential arrangement side. Two protrusions 114 protrude from this sequential arrangement side. The protrusions 114 are advantageously connected to adapter 110 as a single piece. Adapter 110 is particularly preferably constructed as a plastic casting.

[0060] In this embodiment, the protrusion 114 has, for example, a perfectly circular cross-section. Other cross-sections are conceivable.

[0061] Furthermore, a retaining portion 132.2 is recessed in the sequential arrangement side of the adapter 110. According to a variation of the invention, the retaining portion 132.2 has a cross-section different from that of the protrusion 114. In this embodiment, the retaining portion 132.2 has a triangular cross-section.

[0062] like Figure 8 As can be seen, the screw 120 can be inserted through the screw receiving portion 115.4 of the adapter 110. The contact carrier 130 can also be threaded onto the screw 120.

[0063] from Figure 11 and Figure 12 The construction of the contact carrier 130 can be seen in detail in the accompanying drawings. As shown, the contact carrier 130 has two parallel and spaced-apart sidewalls 131 and 132. The sidewalls 131 and 132 form sequentially arranged surfaces on their opposite outer sides. The sidewalls 131 and 132 are connected to each other as one unit via side wall elements 133 and a bottom 134. In this way, an upwardly opening shell structure is obtained. The wall elements 133 and the bottom 134 extend between the sidewalls 131 and 132 and thus extend along the sequential arrangement direction.

[0064] A raised portion 134.1 is provided in the region of the bottom 134. The raised portion 134.1 is passed through by a screw receiving portion 135. The longitudinal central axis of the screw receiving portion 135 extends in the sequential arrangement direction. In addition, two side walls 131 and 132 are also passed through by screw receiving portions 131.3 and 132.3, which are aligned with each other at corresponding positions in the two side walls 131 and 132.

[0065] Figure 11 As can be seen, the protrusion 132.1 protrudes from one of the two sidewalls 132. Alternatively or additionally, at least one fastening receiving portion 132.2 may be recessed into the sidewall 132.

[0066] In this embodiment, the protrusion 132.1 has a circular cross-section. This cross-section is preferably chosen to correspond with the cross-section of the protrusion 114 of the adapter 110. More preferably, the protrusions 132.1 are also arranged spaced apart from each other to the same extent as the protrusions 114. The fastening receiving portion 132.2 also corresponds to the configuration of the fastening receiving portion 132.2 in the adapter 110.

[0067] according to Figure 12 A fastening protrusion 131.2 is arranged on the opposite sidewall 131. Alternatively, one or more centering receiving portions 131.1 may be introduced into the sidewall 131.

[0068] As shown in the attached figures, a longitudinal intermediate plane is constructed between the outer sides of the sidewalls 131 and 132, and the longitudinal intermediate plane is parallel to the outer sides. According to the invention, the centering receiving portion 131.1 is arranged symmetrically with respect to the protrusion 132.1 about the intermediate transverse plane. The protrusion 132.1 is constructed such that its outer contour is smaller than or equal to the inner contour of the centering receiving portion 131.1. This allows multiple contact carriers 130 with identical structures to be arranged sequentially on the sequential arrangement side, such as... Figure 8 As shown. In the sequentially arranged state, the protrusions 114 of the sequentially arranged contact carriers 130 engage with the corresponding centering receiving portion 131.1 and the fixing protrusions 131.2 and the fixing receiving portion 132.2. In this way, the contact carriers 130 are precisely matched and arranged sequentially. This shape-locking prevents movement laterally in the sequential arrangement direction. Furthermore, rotation about an axis laterally in the sequential arrangement direction is also prevented.

[0069] The contact carrier 130 can be threaded onto the screw 120 via its screw receiving portions 131.3 and 135. In the threaded state, the first contact carrier 130 is also reliably fixed to the adapter 110 by means of the protrusion 114 engaged in the centering receiving portion 131.1 and by means of the fastening protrusion 131.2 engaged in the fastening receiving portion 132.2 of the adapter 110.

[0070] like Figure 8 As shown, the cam tube 160 can be rotatably inserted into the through portion 115.2 of the adapter 110. For this purpose, the cam tube 160 has a circular cross-section at its end facing the adapter 110, which is located in the through portion 115.2.

[0071] The cam tube 160 extends from the adapter 110 through the recess 136, which is provided in the sidewalls 131 and 132 of the contact carrier 31.

[0072] Cam disks 150.1 and 150.2 can be connected to cam tube 160. The cam disks are pushed onto and screwed onto cam tube 160 from the side. Cam disks 150.1 and 150.2 are partially inserted into contact carrier 130 with their outer peripheries. Guide elements can be installed in contact carrier 130 to guide the outer peripheries of cam disks 150.1 and 150.2.

[0073] The housing 140 can be fitted onto the contact carrier 130. The housing 140 also has a wall element that is aligned with the side walls 131 and 132 of the contact carrier 31. A through portion 141 is provided in the wall element, which supplements the recesses 136 in the side walls 131 and 132 to form a through portion for the cam tube 160.

[0074] The housing 140 is a component that carries electrical switch contacts, especially electrical double contact elements.

[0075] The housing 140 can be connected to the contact carrier 130 by means of the engaging element 142 to form a contact unit. This relates to an embodiment where the engaging element 142 can be released laterally in the sequential arrangement direction. Thus, in Figure 8 Even when the contact carriers are arranged in sequence, the housing 140 can be detached from the contact carriers 130 laterally upward in the direction of the sequence arrangement. This simplifies the maintenance of the electrical contacts in the housing 140.

[0076] Figure 8 As can be seen, a closure 170 is provided, which can be constructed in the form of a sheet metal part. A spacer 174 is fixed to one side of the closure 170, preferably riveted thereto. A screw receiving portion 172 is also machined in the closure 170, which is aligned with the screw receiving portion 115.4 of the adapter 110. Therefore, the screw 120 can also be guided through the screw receiving portion 172.

[0077] The closure 170 has a connecting surface 173. The closure 170 is positioned on the outside of the last contact unit, particularly on the outside of the last contact carrier 130 in the arrangement of contact carriers 130, with the connecting surface 173. The closure 170 also has a central through portion 171 through which the cam tube 160 passes.

[0078] The spacer 174 has a screw receiving portion into which two screws 120 are screwed. The remaining screw receiving portions 172 in the closure 170 have threads into which two more screws 120 are screwed.

[0079] The connector 200 can be fixed to the closure 170. The connector 200 can also be constructed as a flat plate. The connector 200 can be placed on the spacer 174. Because the spacer 174 is provided with a screw receiving portion, the connector 200 can be tightened with the spacer 174 and the closure 170. For this purpose, a corresponding screw receiving portion is provided in the connector.

[0080] A gap is formed between the closure member 170 and the connector 200. A locking disc 190 is arranged in this gap. The locking disc 190 has a central receiving portion 191, which is aligned with the through portion 201 of the connector 200. A drive shaft 210 can be pushed through the through portion 201, further pushed through the sleeve 202, and inserted into the receiving portion 191 of the locking disc 191, where an anti-rotational connection is formed. Furthermore, the drive shaft 210 can then be pushed into the cam tube 160, where an anti-rotational connection is also formed. The drive shaft 210 has a gear support 211. A gear (not shown) is anti-rotationally fixed to the gear support.

[0081] A locking lever 180 is also installed in the gap between the closure 170 and the connector 200. In this embodiment, two locking levers 180 are used, arranged on opposite sides of the locking disc 190. Each locking lever 180 has a bearing housing 181. The locking lever 180 is fitted onto the spacer element 174 in the lower region of the closure 170 via this bearing housing 181. This provides a pivot support for the locking lever, wherein the pivot axis extends in a sequentially arranged direction.

[0082] The engaging lever 180 also has an engaging element receiving portion 162. At least one of the engaging levers 180 carries an engaging element 183 in the form of a rolling element. The rolling element is constructed and sized such that it can run on the engaging profile on the circumferential side of the engaging disc 91 to form a defined engaging position.

[0083] The engaging rod forms a spring bracket 184 on its side opposite to the bearing housing 181. A spring 185 is fixed to the spring bracket 184. The spring 185 is configured as a tension spring, which pulls the two engaging rods 180 against the engaging disc 190 and thereby applies spring preload.

[0084] In order to fix it Figure 7 The switch block shown is connected to the switch block according to the connector 200. Figure 1 On one side of the fixing unit. This side of the fixing unit is formed by the support surface 12.1 of the adjacent bracket 12. The connector 200 can be tightened to the bracket 12 by means of fixing screws.

[0085] The gear fixed on the gear bracket 211 of the switch block meshes with the teeth 63 and 74 of the corresponding drive units 62 and 73.

[0086] Therefore, if the operating lever 50 is operated, the rotational movement of the gear 63 is transmitted to the drive shaft 210 via the gears of the gear bracket 211. Because the drive shaft 210 is anti-rotationally connected to the cam tube 160, the cam tube 160 also rotates. As the cam tube 160 rotates, the cam disks 150.1 and 150.2 also rotate, thereby closing or opening the switch contacts in the housing 140. The cam tube 160 can also be used to drive an electrical switch unit, such as the drive mechanism of a potentiometer, in the area of ​​the adapter 110, the electrical switch unit being externally sleeved on the adapter 110.

[0087] The operating lever 50 can be adjusted step by step via the locking lever 180 and the locking plate 190.

Claims

1. A switch block for a control device of a work machine, the switch block having an adapter (110) having connection areas (111, 116) on opposite sides, in, The first connection area (111) is used to fix it to the operating unit (40) of the machine. The first contact carrier (130) of the contact unit is indirectly or directly fixed to the second connection area (116), and the contact unit carries at least one electrical switch contact. Furthermore, the first contact carrier (130) has a first sidewall (131) and a second sidewall (132), the outer sides of which are opposite to each other. Its features are, The first sidewall (131) has one or more centering receiving portions (131.1), and the second sidewall (132) has one or more protrusions (132.1). The adapter (110) and / or the second contact carrier (130) arranged sequentially on the first contact carrier (130) along the sequential arrangement direction abut against one side wall (131, 132) of the first contact carrier (130). At least one protrusion (132.1) of the second sidewall (132) of the first contact carrier (130) engages with the centering receiving portion (131.1) of the first sidewall (131) of the sequentially arranged second contact carriers (130) or the centering receiving portion of the sequentially arranged adapters (110). And / or, such that the protrusions (132.1) of the second sidewall (132) of the second contact carrier (130) and / or the protrusions (114) of the adapter (110) are engaged in the centering receiving portion (131.1) of the first sidewall (131) of the first contact carrier (130), arranged in sequence. The contact unit comprises a contact carrier (130) and a housing (140), which are connected to each other and together surround a receiving space. At least one electrical switch contact and rotatably arranged cam disks (150.1, 150.2) are arranged within the receiving space. Rotation of the cam disks (150.1, 150.2) can close or open the switch contact in the housing (140). The connection between the housing (140) and the contact carrier is configured to be detachable transversely to the sequential arrangement direction.

2. The switch block according to claim 1, characterized in that, The outer side of the first sidewall (131) of the contact carrier (130) is provided with at least two centering receiving portions (131.1), and the outer side of the second sidewall (132) is provided with at least two protrusions (132.1).

3. The switch block according to claim 1 or 2, characterized in that, The first contact carrier and the second contact carrier (130) are structurally identical at least in the regions having the centering receiving portion (131.1) and the protrusion (132.1).

4. The switch block according to claim 1 or 2, characterized in that, In addition to at least one centering receiving portion (131.1) of the first sidewall (131) of the contact carrier (130) or the sequentially arranged contact carriers (130), a fastening protrusion (131.2) is provided, which protrudes from the outside of the first sidewall (131) and a fastening receiving portion (132.2) is machined in the outside of the second sidewall (132) of the contact carrier (130), and in the installed state, the fastening protrusion (131.2) engages with the fastening receiving portion (132.2) of the sequentially arranged contact carriers (130) or the adapter (110).

5. The switch block according to claim 4, characterized in that, In addition to at least one centering receiving portion (131.1) of the first sidewall (131) of the contact carrier (130) or the sequentially arranged contact carriers (130), the fastening protrusion (131.2) has a cross-sectional geometry different from that of the centering receiving portion (131.1). And / or, in addition to at least one protrusion (132.1) of the second sidewall (132) of the contact carrier (130) or the sequentially arranged contact carriers (130), a fastening receiving portion (132.2) is provided, which has a cross-sectional geometry different from that of the protrusion (132.1).

6. The switch block according to claim 1 or 2, characterized in that, Two spaced-apart sidewalls (131, 132) are connected by two sidewalls (133) extending in the sequential direction and a bottom (134).

7. The switch block according to claim 1 or 2, characterized in that, At least two screw receptacles (135) are disposed on the contact carrier (130) and the at least two screw receptacles extend in a sequential arrangement direction.

8. The switch block according to claim 1 or 2, characterized in that, The sidewalls (131, 132) have recesses (136) that are aligned with each other and are used to allow the cam tube (160) to pass through.

9. The switch block according to claim 1, characterized in that, The contact carrier and the housing component engage with each other.

10. A contact unit for a switch block of an operating unit (40) for a work machine, said contact unit carrying at least one electrical switch contact, in, The contact carrier (130) of the contact unit has a first sidewall (131) and a second sidewall (132), the outer sides of which are opposite to each other, forming a sequential arrangement side, and the outer sides are arranged at intervals from each other in a sequential arrangement direction. Furthermore, a longitudinal intermediate plane is formed between the outer sides, and the longitudinal intermediate plane is oriented parallel to the outer sides. Its features are, The first sidewall (131) has one or more centering receiving portions (131.1) and the second sidewall (132) has one or more protrusions (132.1), wherein the centering receiving portions (131.1) are arranged symmetrically about the intermediate transverse plane with respect to the protrusions (132.1), and the protrusions (132.1) are configured such that their outer contour is smaller than or equal to the inner contour of the centering receiving portions (131.1). The contact unit comprises a contact carrier (130) and a housing (140), the contact carrier and the housing being connected to each other, and the contact carrier (130) and the housing (140) together enclosing a receiving space, in which at least one electrical switch contact and a rotatably arranged cam disk (150.1, 150.2) are arranged; and The connection between the housing (140) and the contact carrier is configured to be detachable transversely to the sequential arrangement direction.

11. The contact unit according to claim 10, characterized in that, At least two centering receiving portions (131.1) are provided on the outer side of the first sidewall (131) of the contact carrier (130), and at least two protrusions (132.1) are provided on the outer side of the second sidewall (132). The centering receiving portions (131.1) are arranged symmetrically about the intermediate transverse plane with respect to the corresponding protrusions (132.1), and the protrusions are configured such that the outer contour of the protrusion is less than or equal to the inner contour of the corresponding centering receiving portion (131.1).

12. The contact unit according to claim 10 or 11, characterized in that, In addition to at least one centering receiving portion (131.1) of the first sidewall (131) of the contact carrier (130), a fastening protrusion (131.2) is also provided, the fastening protrusion protruding from the outside of the first sidewall (131), and a fastening receiving portion (132.2) is machined in the outside of the second sidewall (132) of the contact carrier (130), the fastening receiving portion (132.2) being arranged symmetrically about the intermediate transverse plane with respect to the fastening protrusion (131.2), and the fastening protrusion (131.2) being configured such that the outer contour of the fastening protrusion is less than or equal to the inner contour of the fastening receiving portion (132.2).

13. The contact unit according to claim 12, characterized in that, In addition to the at least one centering receiving portion (131.1) of the first sidewall (131) of the contact carrier (130), a fastening protrusion (131.2) is also provided, which has a cross-sectional geometry different from that of the centering receiving portion (131.1). And / or, in addition to at least one protrusion (132.1) of the second sidewall (132) of the contact carrier (130), a fastening receiving portion (132.2) is provided, which has a cross-sectional geometry different from that of the protrusion (132.1).

14. The contact unit according to claim 10 or 11, characterized in that, Two spaced-apart sidewalls (131, 132) are connected by two sidewalls (133) extending in the sequential direction and a bottom (134).

15. The contact unit according to claim 10 or 11, characterized in that, At least two screw receptacles (135) are disposed on the contact carrier (130) and the at least two screw receptacles extend in a sequential arrangement direction.

16. The contact unit according to claim 10, characterized in that, The contact carrier and the housing component engage with each other.

17. The switch block according to any one of claims 1 to 9, having a contact unit according to any one of claims 10 to 16.

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