Control device for working machine

Abstract

The present invention relates to a control device for a working machine, comprising a mechanical operating device mounted on a carrier, the operating device comprising first and second operating units, one of which comprises a receptacle for an operating lever, the first and second operating units each being pivotably mounted on the carrier about a pivot axis, the first and second operating units each comprising two drive units spaced apart from one another, each drive unit being assigned a thrust bearing, a clamping lever being supported on the thrust bearings in a spring-preloaded manner, the clamping levers each being pivotably mounted on a carrier, a clamping device acting on at least a portion of the clamping lever to generate the spring preload, the thrust bearings each being constructed as a metal body, the clamping lever being guided on the thrust bearings by means of guide surfaces, at least the portion of at least one clamping lever that bears the guide surface being constructed from a metal part, the metal body of the thrust bearing having a lower hardness than the metal part of the clamping lever. The control device is designed to be wear-optimized and simple to maintain.

Description

Technical Field

[0001] The present invention relates to a control device for a work machine. Such a control device is also called a shift lever and serves as an operating unit for the work machine. Background Art

[0002] The control device comprises a mechanical operating device, which is supported on a carrier. An operating lever having a handle is fixed to the mechanical operating device. The user can predefine the movement process of the working machine on the handle. When the handle is operated, two pivotally supported operating units move. An electric switching device is coupled to the operating unit. For example, the drive motor of the working machine can be controlled via the switching device. For this purpose, the operating unit has a drive unit, which acts on the electric switching device. In order to keep the drive unit in a neutral position when the handle is not operated, a clamping rod is used. The clamping rod acts on the thrust bearing of the drive unit so that the drive unit is supported on the thrust bearing in a spring-prestressed manner.

[0003] After a certain operating time, wear occurs in the dynamics of the control device, which requires maintenance. Summary of the Invention

[0004] The object of the present invention is to provide a control device of the type mentioned at the outset which is designed to be wear-optimized and can be easily maintained.

[0005] This object is achieved by the features of claim 1 .

[0006] 18. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 15, wherein the adjusting base is mounted on a link lever of the second end of the driving member and the control unit, wherein the adjusting base is pivotally connected to the support frame by the spring. The adjusting base is pivotally connected to the support frame by the spring. The adjusting base is pivotally connected to the support frame by the spring.

[0007] With the embodiment according to the invention, wear caused by the movement between the clamping lever and the thrust bearing is shifted to the thrust bearing. The thrust bearing can be replaced simply and cost-effectively, thus simplifying maintenance. In particular, two clamping levers are typically supported on the thrust bearing in each case, so that the thrust bearing can be held in a neutral position when the control device is unloaded. Since there is little or no wear on the clamping lever in this case, the thrust bearing only needs to be replaced for maintenance. This results in a wear-optimized design.

[0008] According to a preferred variant of the present invention, it can be provided that the clamping rod is made of stainless steel, in particular of chrome-nickel steel. In this design, the wear on a clamping rod or a plurality of clamping rods is actually eliminated.

[0009] The clamping rod is particularly easy to manufacture if it is configured so that the clamping rod is formed as a punched part from a sheet metal blank and one side of the clamping rod forms a sliding surface, which rests on a mating surface of the carrier to form a sliding bearing. In addition, this allows the clamping rod to be guided stably and precisely.

[0010] In particular, it can also be provided here that the carrier is produced as a die-cast component, preferably as a zinc die-cast part.

[0011] If the carrier has a base part with a through-opening, the actuating device being supported on the base part in the region of the through-opening, and a bracket being integrally formed on the base part, which bracket projects from the base part and on which the clamping rod is held, the clamping rods can be easily aligned with each other and with respect to the bearing in a precisely matching manner.

[0012] The control device according to the invention can have the following features: the clamping lever has a bearing receptacle, to which lever arms are connected on both sides, wherein a guide surface is formed on one lever arm and the clamping device acts indirectly or directly on the other lever arm, so that the clamping lever has a bearing receptacle, into which a bearing part preferably consists of the same material as the clamping lever, preferably stainless steel, engages.

[0013] If the bearing element is made of the same material as the clamping rod, uniform wear occurs on both components. This results in an optimized service life, and both components can be replaced simultaneously during maintenance. If the bearing element is made of stainless steel, the loads that occur can be reliably absorbed and dissipated. Under high stress conditions, especially in the event of improper operation, there is no need to worry about bearing failure. If the clamping rod and the bearing element are made of stainless steel, this material combination creates a particularly rigid mechanical composite that, on the one hand, can transmit the existing load forces without deformation and, on the other hand, surprisingly achieves a very long service life.

[0014] According to the present invention, it is also possible to design the bearing receptacle of the clamping lever as a laterally open receptacle. The clamping lever can be easily installed by sliding it laterally with its bearing receptacle onto the bearing element. Since the clamping lever is spring-loaded, it is securely pressed against the bearing element and held there to form the pivoting support.

[0015] To achieve very low component costs and assembly outlay, it can be provided that the bearing part is pressed into the hole of the bracket and has a molded head which is supported on the side of the clamping lever facing away from the bracket so that it is held in a positively locking manner.

[0016] According to the present invention, the first and / or second operating units are each pivotably mounted on a carrier on opposite sides by means of bearing elements. The bearing elements comprise a threaded section and a bearing section connected to the threaded section. The threaded section is screwed into the carrier, and the bearing section is inserted into a bore receptacle, thereby forming a pivot bearing. The bearing elements each comprise a tool receptacle operable from the outside of the carrier, preferably a hexagonal socket or a Pozidriv drive. This allows for simple support of the operating units. The threaded section allows for a smooth adjustment of the support of the operating units. If the threaded section is centered and aligned with the bearing drive, the two regions of the bearing element can be easily and precisely formed in the recess during machining on a turning machine. In particular, it can be provided that the bearing section is finish-turned. This eliminates the need for grinding to produce the bearing section. The use of a hexagonal socket and, in particular, a Pozidriv drive in the form of a tool receptacle enables automatic and precise adjustment of the bearing play.

[0017] A preferred embodiment of the invention can provide for a screw to be fixed or integrally formed on at least a portion of the drive units of the two operating units, and for the screw to hold the thrust bearing by means of the securing element. The thrust bearing can then be replaced easily and quickly, even by untrained personnel.

[0018] Another preferred embodiment of the present invention is that the thrust bearing is made of brass or a brass alloy, preferably in the form of rolling elements, and is rotatably mounted on the bolt. Even when a brass alloy is used, a very long service life of the thrust bearing can be achieved. When rolling elements are used, friction losses can be further reduced by the rotation of the thrust bearing corresponding to the clamping lever. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in detail below based on the embodiments shown in the accompanying drawings.

[0020] Figure 1 shows a perspective view of a control device for a working machine,

[0021] Figure 2 Shown from different perspectives Figure 1 Schematic diagram,

[0022] Figure 3 Shown according to Figure 1 A perspective view of the components of the control device, including the operating lever,

[0023] Figure 4 Shown according to Figure 1 Another component of the control device includes Figure 3 Components,

[0024] Figure 5 Shown according to Figure 4 The components are in the corrected installation position,

[0025] Figure 6 Shown Figure 1 A perspective view from below of the detail in the figure,

[0026] Figure 7 shows the installation according to Figure 1 an electrical switching unit of a control device,

[0027] Figure 8 Shown according to Figure 7 Exploded view of the electrical switch unit,

[0028] Figure 9 and Figure 10 Shown according to Figure 7 and Figure 8 A perspective view of the adapter of the switching unit, and

[0029] Figure 11 and Figure 12 Shown according to Figure 7 and Figure 8 A perspective view of a contact carrier of a switching unit. DETAILED DESCRIPTION

[0030] Figure 1 and Figure 2 A control device for a working machine is shown, which has a carrier 10 , which can preferably be designed in one piece and particularly preferably can be composed of a zinc die-cast part.

[0031] The carrier 10 has a base part 11, which forms a through-hole 11.1. Four brackets 12 are mounted protrudingly on the base part 11. In particular, the brackets 12 are integrally molded onto the base part 11. The brackets 12 each have two support surfaces 12.1, 12.2, which are arranged at an angle to each other, preferably at right angles to each other. Figure 2As can be seen in FIG, the two support surfaces 12 . 1 , 12 . 2 can be connected, for example, at an outer edge of the support 12 .

[0032] The operating unit 40 can be fixed on the carrier 10. The operating unit 40 is referred to below. Figures 3 to 5 Elaborate. Figure 3 As shown, the operating unit 40 has a coupling element 53. The coupling element 53 has a receptacle 54. An operating lever 50 can be fixed to or in the receptacle 54. The operating lever 50 has a connecting section 52 adjacent to the receptacle 54, which transitions into a fixing element 51. A handle knob can be fixed to the fixing element 51. The operating lever 50 can be bonded or screwed to the coupling element 53.

[0033] The coupling element 53 has two bearing projections 55 on opposite sides. The bearing projections can be integrally molded onto the coupling element 53.

[0034] like Figure 4 As can be seen in FIG, the first actuating unit 60 is pushed onto the coupling element 53. The first actuating unit 60 has a bridge 61 which surrounds the receptacle for the coupling element 53. Figure 4 In the drawing, the coupling element 53 is inserted into the receptacle from below. Here, the bearing projection 55 engages in a recess in the bridge 61. In the region of the receptacle, the bridge 61 has two guide surfaces 66 spaced apart from one another, between which the coupling element 53 is received. If the coupling element 53 is moved (e.g., due to an actuation of the operating lever 50), the coupling element 53 pivots about the pivot axis formed by the two bearing projections 55. The coupling element 53 is guided on the two guide surfaces 66.

[0035] On the bridge portion 61, drive units 62 are molded on the opposite sides. Each drive unit 62 has a tooth portion 63. Figure 4 The illustrated embodiment can be arc-shaped. In the region of the free end of the drive unit 62, a screw 64.1 is pressed into a hole in the drive unit 62 or screwed into a threaded receptacle. A thrust bearing 64 in the form of a rolling element is pushed onto the screw 61. The thrust bearing 64 can be rotated onto the screw 64. The thrust bearing 64 is secured by a fixing element 65, such as a retaining ring.

[0036] Figure 4 It can be seen that a spiral receptacle 67 is introduced into the bridge 61. Two spiral receptacles 67 are provided on each side of the bridge 61, both adjacent to the bearing projection 55. The bearing projection 55 projects a distance beyond the bridge 61. Figure 5It can be seen that the bearing plate 90 is pushed onto the bearing projection 55 by means of the bearing eye, thereby forming a pivot mount for the coupling element 53. The bearing plate 90 is fastened by means of a fixing screw 91 which passes through a screw receptacle of the bearing plate 90 and is screwed into the screw receptacle 67 of the bridge 61.

[0037] Figure 4 It is also shown that the second actuating unit 70 can be pushed onto the first actuating unit 60 from above.

[0038] The second operating unit 70 has a connecting piece 71 that connects two drive units 73. The connecting piece 71 has an arc-shaped slot that defines a guide surface 72. The second operating unit 70 can be connected to the operating rod 50 via the slot.

[0039] The connecting member 71 carries two drive units 73 as described above, wherein the drive unit 73 is preferably connected to the connecting member 71 in one piece. The two drive units 73 have a tooth portion 74, which is preferably designed to be arc-shaped, such as Figure 4 As shown in FIG. 1 , a screw 75 . 1 is pressed or screwed into a hole in the drive unit 73 on the second actuating unit 70 , as on the first actuating unit 60 . The screws 75 . 1 each carry a thrust bearing 75 . The thrust bearing 75 is constructed identically to the thrust bearing 64 and is secured to the screw 75 . 1 by means of a securing element 76 .

[0040] The four thrust bearings 64 , 75 can be made of brass or a brass alloy, for example.

[0041] A bore receptacle 77 is provided in the transition region between the drive unit 73 and the connecting piece 71. The longitudinal center axes of the two bore receptacles 77 are aligned with one another. Figure 4 It can be seen that the first actuating unit 60 has hole receptacles 68 on the opposite side, which are likewise aligned with one another.

[0042] In order to install Figure 4The actuating unit 40 shown in FIG. is inserted into the through-hole 11.1 of the base part 11. The aforementioned bore receptacles 68, 77 are aligned with the threaded receptacles of the base part 11. The bearing element 14 can be screwed into this threaded receptacle. For this purpose, the bearing element 14 has a threaded section onto which a head with a tool receptacle, in this case a Torx tool receptacle, is integrally molded. The bearing element 14 has a bearing pin integrally molded in alignment with the threaded section. When the bearing element 14 is screwed into the threaded receptacle of the base part 11 with its threaded section, the bearing pin engages with the corresponding bore receptacle 68, 77 of the first actuating unit 60 or the second actuating unit 70. In this manner, the bearing element 14 is screwed in from all sides of the base part 11. The bearing element 14 can be secured using nuts 15, 16, which are screwed onto the threaded section of the bearing element 14 and clamped relative to the base part 11. Thus, the first operating unit 60 and the second operating unit 70 are each held on the base 11 so as to be pivotable about an axis. The axis about which the first operating unit 60 can pivot is perpendicular to the axis about which the second operating unit 70 can pivot. Furthermore, the two pivot axes lie in parallel or identical planes. This forms a universal joint. To simplify assembly, it is provided that the second operating unit 70 is first incorporated into the carrier 10. Then, the second operating unit 70 can be inserted from below. Figure 3 The structural unit is pushed together with the first actuating unit 60 from below into the carrier 10 . In this process, the actuating lever 50 is moved into the gap formed between the guide surfaces 72 .

[0043] like Figure 1 It can be seen that the slide 80 is pushed onto the operating lever 50. For this purpose, the slide 80 has a hole that surrounds the operating lever 50 at its connecting section 52. The slide 80 is pushed onto the coupling element 53 so that it is located between the two guide surfaces 72 of the second operating unit 70. When the operating lever 50 is moved, the slide 80 slides on the curved path between the two guide surfaces 72.

[0044] Figure 1 It can be seen that two clamping levers 20 are each pivotably supported on the support 12 of the carrier 10. The clamping lever 20 has two lever arms 21, 22, which are each connected to a bearing receptacle 24 of the clamping lever 20. Figure 6 Can see the bearing receiving portion 24. As shown in the figure, the bearing receiving portion 24 is open towards the side of the clamping rod 20.

[0045] Figure 6It is also shown that the clamping lever 20 is connected to the bracket 12 via the bearing element 13. The bearing element 13 has a bearing bolt. The bearing bolt is pressed into a hole in the bracket 12. The bearing element 13 also has a head 13.1. When the bearing element 13 is installed, it is spaced apart from the inner surface of the bracket 12. Between this inner surface and the underside of the head 13.1, the clamping lever 20 is pushed laterally onto the bearing element 13. Thus, a pivot bearing is formed by the bearing bolt of the bearing element 13 and the bearing receptacle 24.

[0046] like Figure 6 As shown, guide surfaces 23 are integrally formed on the lever arms 22. The clamping levers 20, which are fixed to the adjacent brackets 12, rest on the opposite sides on the thrust bearings 64 or 75. In this way, all four thrust bearings 64, 75 between each two clamping levers are protected.

[0047] The clamping lever 20 can be clamped by means of the clamping device 30 so that the guide surface 23 rests against the thrust bearings 64 , 75 under spring preload.

[0048] The clamping device 30 has two coupling elements 31, each of which is supported on a bolt 33 of the clamping lever 20. A clamping spring 32 in the form of a compression spring acts between the two coupling elements 31. The clamping spring 32 clamps the coupling elements 31 against the two bolts 33. In this way, force is introduced into the lever arm 21 of the clamping lever 20 via the bolts 33. This force is transferred to the second lever arm 22, which rests against the thrust bearing 64 or 75 in an elastically prestressed manner. The drawing shows the clamping device in a neutral position, holding the operating unit 40 in its center position.

[0049] According to the present invention, the thrust bearings 64, 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 thrust bearings 64, 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.

[0050] If the operating lever 50 is moved, the first operating unit 60 and the second operating unit 70 are pivoted according to the movement direction of the operating lever 50. As the operating units 60, 70 are moved, the drive units 62, 73 are also moved out of the neutral position shown in the drawing. Figure 6 If the rear drive unit 62 shown in the drawing is pivoted to the left in the drawing plane, the lever arm 22 on the left side of the clamping lever 20 is pivoted counterclockwise, and the lever arm 22 on the right side of the clamping lever 20 also follows counterclockwise to the left, so that the guide surfaces 23 of the two clamping levers 20 remain in contact with the thrust bearing 64.

[0051] If the user releases the operating lever 50 , the clamping device 30 returns the drive units 62 , 73 to the neutral position again via the clamping lever 20 and the thrust bearings 64 , 75 .

[0052] exist Figures 7 to 9 The switch block is described in the Figures 1 to 6 In particular, such a switch block can be mounted laterally on each of the four sides of the operating unit 40 on the support 12. The structure and function of the switch block are described in detail below.

[0053] like Figure 1 As shown, the switch block has an adapter 110 on which contact units with contact carriers 130 are arranged in sequence. Opposite the adapter 110, a closing element 170 is mounted on the last contact unit in the contact unit arrangement. Opposite the closing element, the switch block is closed by means of a connecting element 200.

[0054] exist Figure 8 An exploded view of the switch block is shown in detail in . Figure 9 and Figure 10 First, the structure of the adapter 110 will be described.

[0055] As shown in the figure, the adapter 110 can be configured in a flat plate shape. The adapter has a first connection area 111. The connection area 111 can have a flat connection surface. A spiral receiving portion 112 passes through the connection area 111, and an electrical conductor can be fixed on the spiral receiving portion.

[0056] The orientation elements 113.1 and 113.2 protrude on the outer side of the connection region 111. In the connection side forming the connection region 111, a recess 115 is recessed.

[0057] A dome 115.1 with a spiral receptacle is arranged in the region of the recess 115. The recess 115 is laterally delimited by a spacer 115.3 which surrounds the recess at least in regions.

[0058] Electrical components, particularly potentiometers of various designs, can be mounted in the connection region 111. Accordingly, the adapter 110 forms a universal component for accommodating various electrical components. For example, an electrical component can be placed with its flat connection surface on the flat surface of the connection region and oriented with a precise fit on the orientation elements 113.1 and 113.2. It is also conceivable to use multiple electrical components each having a perfectly circular connection region. The connection regions allow the electrical components to be placed on the spacer 115.3. The electrical components can also be supported on the dome 115.1 and positioned with a precise fit. They can be secured via screw-type receptacles in the dome 115.1.

[0059] Figure 9 and Figure 10It can also be seen that the adapter 110 has a screw receptacle 115.4, which passes through the adapter 110. Furthermore, a passage 115.2 is also provided on the adapter 110.

[0060] Figure 9 The rear side of the adapter 110 can be seen. As shown in this drawing, the adapter 110 forms a second connection region 116 on the rear side. This second connection region 116 forms the mounting side. Two projections 114 protrude from this mounting side. The projections 114 are advantageously integrally connected to the adapter 110. The adapter 110 is particularly preferably designed as a cast plastic part.

[0061] In this embodiment, the projection 114 has, for example, a perfectly circular cross section. Other cross sections are conceivable.

[0062] Furthermore, a fastening receptacle 132.2 is recessed into the in-line side of the adapter 110. According to a variant of the invention, the fastening receptacle 132.2 has a cross section that differs from the cross section of the projection 114. In this embodiment, the fastening receptacle 132.2 has a triangular cross section.

[0063] like Figure 8 It can be seen that the screw 120 can be inserted through the screw receptacle 115 . 4 of the adapter 110 . The contact carrier 130 can also be threaded onto the screw 120 .

[0064] from Figure 11 and Figure 12 The design of the contact carrier 130 can be seen in detail in the figure. As shown in the figure, the contact carrier 130 has two parallel, spaced-apart side walls 131 and 132. Side walls 131 and 132 form a sequence surface on opposing outer sides. Side walls 131 and 132 are connected to one another in one piece via lateral wall elements 133 and a bottom 134. This results in a housing structure that opens upward. Wall elements 133 and bottom 134 extend between side walls 131 and 132 and thus in the sequence direction.

[0065] A raised portion 134.1 is provided in the region of the bottom 134. A spiral receptacle 135 extends through the raised portion 134.1. The longitudinal center axis of the spiral receptacle 135 extends in the direction of the arrangement. Furthermore, spiral receptacles 131.3, 132.3 extend through both side walls 131 and 132, which are aligned with one another at corresponding locations in the two side walls 131 and 132.

[0066] Figure 11 It can be seen that the projection 132.1 projects on one of the two side walls 132. Additionally or alternatively, it can also be provided that at least one fastening receptacle 132.2 is recessed into this side wall 132.

[0067] In this embodiment, projection 132.1 has a perfectly circular cross-section. This cross-section is preferably selected to be identical to the cross-section of projection 114 of adapter 110. More preferably, projections 132.1 are also spaced apart from one another to the same degree as projections 114. Fastening receptacles 132.2 also correspond in design to fastening receptacles 132.2 in adapter 110.

[0068] according to Figure 12 , a fastening projection 131 . 2 is arranged on the opposite side wall 131. Additionally or alternatively, one or more centering receptacles 131 . 1 can also be introduced into the side wall 131.

[0069] As can be seen in the accompanying drawings, a longitudinal middle plane is formed between the outer sides of the side walls 131 and 132, and the longitudinal middle plane is parallel to the outer sides. According to the present invention, the centering receptacle 131.1 is arranged at a position symmetrical to the protrusion 132.1 about the middle transverse plane. The protrusion 132.1 is configured so that its outer contour is smaller than or equal to the inner contour of the centering receptacle 131.1. This allows multiple contact carriers 130 with the same structure to be arranged in sequence on the side of the sequential arrangement, such as Figure 8 As shown. When the contact carriers 130 are arranged in sequence, the protrusions 114 engage with the corresponding centering receptacles 131.1, securing protrusions 131.2, and securing receptacles 132.2. In this way, the contact carriers 130 are arranged in sequence with a precise fit. This prevents movement transverse to the direction of arrangement by a positive fit. Furthermore, rotation about an axis transverse to the direction of arrangement is also prevented.

[0070] The contact carrier 130 can be threaded onto the screw 120 with its screw receptacles 131.3 and 135. In the threaded state, the first contact carrier 130 is also securely fixed to the adapter 110 by means of the projection 114 engaging in the centering receptacle 131.1 and by means of the fastening projection 131.2 engaging in the fastening receptacle 132.2 of the adapter 110.

[0071] like Figure 8 As shown, the cam tube 160 can be rotatably inserted into the through-hole 115.2 of the adapter 110. For this purpose, the cam tube 160 has a perfect circular cross section at its end facing the adapter 110, and the perfect circular cross section is located in the through-hole 115.2.

[0072] The cam tube 160 extends from the adapter 110 through a recess 136 which is provided in the side walls 131 and 132 of the contact carrier 31 .

[0073] The cam discs 150.1 and 150.2 are connected to the cam tube 160. The cam discs are pushed onto the cam tube 160 from the side and screwed thereto. The cam discs 150.1 and 150.2 are partially inserted with their outer circumference into the contact carrier 130. Guide elements can be incorporated into the contact carrier 130 to guide the outer circumference of the cam discs 150.1 and 150.2.

[0074] A housing part 140 can be placed onto the contact carrier 130. The housing part 140 in turn has a wall element that is aligned with the side walls 131, 132 of the contact carrier 31. A through-hole 141 is provided in the wall element, which complements the recess 136 in the side walls 131, 132 to form a through-hole for the cam tube 160.

[0075] The housing part 140 is a component that carries electrical switching contacts, in particular an electrical double contact element.

[0076] The housing part 140 can be connected to the contact carrier 130 by means of a latching element 142 to form a contact unit. This is an embodiment in which the latching element 142 can be released transversely to the sequential arrangement direction. Figure 8 Even when the contact carriers are in a sequentially arranged state, the housing part 140 can be released upwardly from the contact carrier 130 transversely to the sequential arrangement direction. This simplifies the maintenance of the electrical contacts in the housing part 140.

[0077] Figure 8 It can be seen that a closure element 170 is provided, which can be designed in the form of a sheet metal part. A spacer 174 is fixed to one side of the closure element 170, preferably riveted here. A screw receptacle 172 is also formed in the closure element 170, which is aligned with the screw receptacle 115.4 of the adapter 110. Thus, the screw 120 can also be guided through the screw receptacle 172.

[0078] The closing element 170 has a connecting surface 173. The closing element 170 is placed with this connecting surface 173 on the outside of the last contact unit, in particular on the outside of the last contact carrier 130 of the arrangement of contact carriers 130. The closing element 170 also has a central passage 171 through which the cam tube 160 passes.

[0079] The spacer 174 has a screw receptacle into which two screws 120 are screwed. The remaining screw receptacle 172 in the closure element 170 has a thread into which two further screws 120 are screwed.

[0080] The connecting piece 200 can be fixed to the closure element 170. The connecting piece 200 can also be designed in the form of a flat plate. The connecting piece 200 can be placed on the spacer 174. Because the spacer 174 is provided with a screw receptacle, the connecting piece 200 can be screwed to the spacer 174 and to the closure element 170. For this purpose, a corresponding screw receptacle is provided in the connecting piece.

[0081] A gap is formed between the closure element 170 and the connecting element 200. A latching disc 190 is arranged in this gap. The latching disc 190 has a central receptacle 191 that aligns with the through-hole 201 of the connecting element 200. A drive shaft 210 can be pushed through the through-hole 201, then through the sleeve 202 and inserted into the receptacle 191 of the latching disc 91, whereby a rotationally fixed connection is formed. The drive shaft 210 can then be inserted into the cam tube 160, whereby a rotationally fixed connection is also formed. The drive shaft 210 has a gear carrier 211. A gear (not shown) is fixed to the gear carrier in a rotationally fixed manner.

[0082] A latching lever 180 is also mounted in the gap between the closure element 170 and the connecting element 200. In this embodiment, two latching levers 180 are used, arranged on opposite sides of the latching disk 190. The latching levers 180 have bearing receptacles 181. With these bearing receptacles 181, the latching levers 180 are mounted on the spacer element 174 in the lower region of the closure element 170. This provides a pivotal support for the latching levers, with the pivot axis extending in the sequential direction.

[0083] The latching levers 180 also have latching element receptacles 162. At least one latching lever 180 carries a latching element 183 in the form of a rolling element. The rolling element is designed and dimensioned so that it can run on the latching contour on the circumference of the latching disk 91, thereby forming a defined latching position.

[0084] The latching lever forms a spring support 184 on its side facing away from the bearing receptacle 181. A spring 185 is fixed to this spring support 184. The spring 185 is designed as a tension spring, which pulls the two latching levers 180 against the latching disc 190 and thereby applies a spring preload.

[0085] In order to fix Figure 7 The switch block shown in FIG. 2 is connected to the switch block by means of a connecting piece 200 according to 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 connecting piece 200 can be tightened to the bracket 12 by means of fixing screws.

[0086] The gears fixed to the gear support 211 of the switch block mesh with the toothed portions 63 , 74 of the corresponding drive units 62 , 73 .

[0087] Therefore, if the operating lever 50 is actuated, the rotational movement of the toothed section 63 is transmitted to the drive shaft 210 via the gear of the gear carrier 211. Because the drive shaft 210 is connected to the cam tube 160 in a rotationally fixed manner, the cam tube 160 also rotates. As the cam tube 160 rotates, the cam discs 150.1 and 150.2 also rotate, thereby closing or opening the switching contacts in the housing part 140. The cam tube 160 can also be used to drive the drive mechanism of an electrical switching unit, such as a potentiometer, in the area of the adapter 110, which is slid onto the outside of the adapter 110.

[0088] Via the latching lever 180 and the latching disk 190 , a stepwise adjustment of the operating lever 50 can be predetermined.

Claims

1. A control device for a working machine, comprising a mechanical operating device supported on a carrier (10), wherein: The operating device comprises a first operating unit (60) and a second operating unit (70), wherein one of the operating units (60, 70) comprises a receiving portion for an operating rod (50), wherein the first operating unit (60) and the second operating unit (70) are pivotally supported on the carrier (10) about a pivot axis, wherein the first operating unit (60) and the second operating unit (70) each comprise two drive units (62, 73) spaced apart from each other, wherein each drive unit (63, 73) is equipped with a thrust bearing (64, 75), wherein the clamping rod (20) is elastically supported. The spring-preloaded support is supported on the thrust bearings (64, 75), and the clamping rods are respectively pivotally supported on the bracket (12), wherein the clamping device (30) acts on at least a part of the clamping rod (20) to generate spring preload, wherein the thrust bearings (64, 75) are respectively constructed as metal bodies, and the clamping rod (20) is guided on the metal bodies by means of guide surfaces (23), wherein at least the part of at least one clamping rod (20) that carries the guide surfaces (23) is composed of a metal part, and wherein the metal body of the thrust bearings (64, 75) has a lower hardness than the metal part of the clamping rod (20).

2. The control device according to claim 1, characterized in that The clamping rod (20) is made of stainless steel.

3. The control device according to claim 1 or 2, characterized in that: The clamping rod (20) is made into a punched part composed of a plate blank, and the side surface of the clamping rod (20) forms a sliding surface, which is placed on the matching surface of the carrier (10) to form a sliding support.

4. The control device according to claim 1 or 2, characterized in that: The carrier (10) is produced as a die-cast component.

5. The control device according to claim 1 or 2, characterized in that: The carrier (10) has a base part (11) with a through-hole (11.1), wherein the actuating device is supported on the base part (11) in the region of the through-hole (11.1), and a bracket (12) is integrally formed on the base part (11), which bracket protrudes from the base part (11) and on which the clamping rod (20) is held.

6. The control device according to claim 1 or 2, characterized in that: The clamping lever (20) has a bearing receptacle (24) to which lever arms (21, 22) are connected on both sides, wherein a guide surface (23) is formed on one lever arm (22) and the clamping device (30) acts indirectly or directly on the other lever arm (21), so that the clamping lever (20) has a bearing receptacle (24) in which the bearing part (13) engages.

7. The control device according to claim 6, characterized in that The bearing receptacle (24) of the clamping lever (20) is designed as a laterally open receptacle.

8. The control device according to claim 6, characterized in that The bearing element (13) is pressed into a hole in the bracket (12) of the carrier (10) and has a molded head (13.1) which is supported on the side of the clamping lever (20) facing away from the bracket (12) and is thus held in a form-fitting manner.

9. The control device according to claim 1 or 2, characterized in that: The first operating unit (60) and / or the second operating unit (70) are respectively pivotably held on the carrier (10) on opposite sides by means of bearing elements (14), wherein the bearing element (14) has a threaded section and a bearing section connected to the threaded section, wherein the threaded section is screwed into the carrier (10) and the bearing section is inserted into a hole receiving portion (68, 77) to form a pivot support, and wherein the bearing element (14) respectively has a tool receiving portion and a drive mechanism that can be operated from the outside of the carrier (10).

10. The control device according to claim 1 or 2, characterized in that: Bolts (64.1, 75.1) are respectively held or molded on at least a portion of the drive units (62, 73) of the two operating units (60, 70), and the bolts (64.1, 75.1) hold the thrust bearings (64, 75) by means of fixing elements (65).

11. The control device according to claim 10, characterized in that: The thrust bearings (64, 75) are made of brass or a brass alloy.

12. The control device according to claim 1 or 2, characterized in that: The pivot axes of the first operating unit (60) and the second operating unit (70) are arranged at an angle of 90° to one another, wherein the pivot axes extend in planes that are parallel to one another or completely overlap one another.

13. The control device according to claim 2, characterized in that The clamping rod (20) is made of chromium-nickel steel.

14. The control device according to claim 6, characterized in that The bearing element is made of the same material as the clamping rod (20).

15. The control device according to claim 6, characterized in that The bearing member is made of stainless steel.

16. The control device according to claim 9, characterized in that The tool accommodating portion is a driving mechanism with an inner hexagon or a Pozidriv head.

17. The control device according to claim 11, characterized in that The thrust bearing (64, 75) is designed as a rolling body and is rotatably held on the bolt (64.1, 75.1).

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