阅读说明：本技术 用于作业机的控制装置 (Control device for working machine ) 是由 J·瓦格纳 于 2020-02-21 设计创作，主要内容包括：本发明涉及用于作业机的控制装置,其具有支承在载体上的机械操纵装置,操纵装置具有第一和第二操纵单元,其中一个具有用于操作杆的容纳部,第一和第二操纵单元分别围绕枢转轴线可枢转地支承在载体上,第一和第二操纵单元分别具有两个彼此间隔开的驱动单元,为每个驱动单元配备推力轴承,夹紧杆受到弹簧预紧地支撑在推力轴承上,夹紧杆分别可枢转地支承在支架上,夹紧装置作用到夹紧杆的至少一部分以产生弹簧预紧,推力轴承分别构造成金属体,夹紧杆借助引导面在推力轴承上引导,至少一个夹紧杆的至少承载引导面的部分由金属件构成,推力轴承的金属体比夹紧杆的金属件具有更小的硬度。这种控制装置构造成磨损优化的并且能够简单地维护。(The invention relates to a control device for a working machine, comprising a mechanical actuating device supported on a carrier, the actuating device comprising a first and a second actuating unit, one of the actuating units has a receptacle for an actuating lever, the first and second actuating units are each mounted on a carrier so as to be pivotable about a pivot axis, the first and second actuating units each have two drive units which are spaced apart from one another, a thrust bearing is associated with each drive unit, the clamping lever is supported on the thrust bearing under spring pretension, the clamping lever is each mounted so as to be pivotable on a carrier, a clamping device acts on at least one part of the clamping lever in order to generate the spring pretension, the thrust bearings are each designed as a metal body, the clamping lever is guided on the thrust bearing by means of a guide surface, at least the part of at least one clamping lever which bears the guide surface is formed by a metal part, and the metal body of the thrust bearing has a lower hardness than the metal part of. Such a control device is designed to be wear-optimized and can be easily maintained.)

1. A control device for a working machine, having a mechanical actuating device, which is mounted on a carrier (10), wherein the actuating device has a first actuating unit (60) and a second actuating unit (70), wherein one of the actuating units (60, 70) has a receptacle for an actuating lever (50), wherein the first actuating unit (60) and the second actuating unit (70) are each mounted on the carrier (10) so as to be pivotable about a pivot axis, wherein the first actuating unit (60) and the second actuating unit (70) each have two drive units (62, 73) which are spaced apart from one another, wherein a thrust bearing (64, 75) is associated with each drive unit (63, 73), wherein a clamping lever (20) is supported on the thrust bearing (64, 75) in a spring-loaded manner, 75) Wherein a clamping device (30) acts on at least one part of the clamping lever (20) to generate a spring pretension, wherein the thrust bearings (64, 75) are each designed as a metal body on which the clamping lever (20) is guided by means of a guide surface (23), wherein at least the part of at least one clamping lever (20) that bears the guide surface (23) is formed by 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 lever (20).

2. Control device according to claim 1, characterized in that the clamping lever (20) consists of stainless steel, in particular of chrome-nickel steel.

3. Control device according to claim 1 or 2, characterized in that the clamping bar (20) is made as a punched piece of a sheet-blank piece, the side faces of the clamping bar (20) forming sliding faces which rest on the mating faces of the carrier (10) to form a sliding bearing.

4. Control arrangement according to any one of claims 1-3, characterized in that the carrier (10) is manufactured as a die-cast component.

5. Control device according to one of claims 1 to 4, characterized in that the carrier (10) has a base part (11) comprising a through-opening (11.1), wherein the actuating device is supported on the base part (11) in the region of the through-opening (11.1), and a bracket (12) is molded on the base part (11), which bracket protrudes from the base part (11) and on which the clamping lever (20) is held.

6. Control device according to one of claims 1 to 5, characterized in that the clamping lever (20) has a bearing receptacle (24) on which the 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) such that the clamping lever (20) has a bearing receptacle (24) into which a bearing piece (13) engages, which preferably consists of the same material as the clamping lever (20), particularly preferably consists of stainless steel.

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

8. Control device according to claim 6 or 7, characterized in that the bearing element (13) is pressed into a bore of a carrier (12) of the carrier (10) and in that the bearing element (13) has a molded head (13.1) which is supported on the side of the clamping lever (20) facing away from the carrier (12) in order to hold it in a form-fitting manner.

9. Control device according to one of claims 1 to 8, characterized in that the first actuating unit (60) and/or the second actuating unit (70) are each pivotably held on the carrier (10) on opposite sides by means of a bearing element (14), wherein the bearing element (14) has a threaded section and a bearing section connected thereto, wherein the threaded section is screwed into the carrier (10) and the bearing section is inserted into an aperture receptacle (68, 77) so as to form a pivot bearing, and wherein the bearing elements (14) each have a tool receptacle, preferably an internal hexagon or geneva drive, which can be actuated from the outside of the carrier (10).

10. Control device according to any one of claims 1 to 9, characterized in that a bolt (64.1, 75.1) is held or molded on at least a part of the drive units (62, 73) of the two operating units (60, 70), respectively, and that the bolt (64.1, 75.1) holds the thrust bearing (64, 75) by means of a fixing element (65).

11. Control device according to any one of claims 1 to 10, characterized in that the thrust bearing (64, 75) consists of brass or a brass alloy and is preferably configured as a rolling body and is rotatably held on the bolt (64.1, 75.1).

12. Control device according to any one of claims 1-11, characterized in that the pivot axes of the first and second operating units (60, 70) are arranged at an angle of 90 ° to each other, wherein the pivot axes extend in planes which are parallel or completely overlapping each other.

Technical Field

The present invention relates to a control device for a working machine. Such a control device is also referred to as a shift lever and serves as an operating unit of the working machine.

Background

The control device comprises a mechanical (mechanisch) handling device which is supported on the carrier. An operating lever is fixed to the mechanical operating device and has a handle. The user can specify the course of the movement of the work machine on the handle. When the handle is actuated, the two pivotably mounted actuating units are displaced. The electrical switching device is coupled to the actuating unit. The drive motor of the working machine can be controlled, for example, via a switching device. For this purpose, the actuating unit has a drive unit which acts on the electrical switching device. In order to be able to hold the drive unit in the neutral position when the handle is not actuated, a clamping lever is used. The clamping lever acts on a thrust bearing of the drive unit, so that the drive unit is supported on the thrust bearing under a spring bias.

After a certain operating time, wear occurs in the dynamics of the control device, which wear requires maintenance.

Disclosure of Invention

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

This object is achieved by the features of claim 1.

A control device is therefore proposed, wherein the actuating device has a first actuating unit and a second actuating unit, wherein one of the actuating units has a receptacle for an actuating lever, wherein the first actuating unit and the second actuating unit can each be mounted pivotably about a pivot axis on a carrier, wherein the first actuating unit and the second actuating unit each have two drive units spaced apart from one another, wherein a thrust bearing is associated with each drive unit, wherein the clamping lever is supported on the thrust bearing in a spring-biased manner, wherein the clamping lever is each mounted pivotably on a carrier, wherein the clamping device acts on at least one part of the clamping lever to generate the spring bias, wherein the thrust bearings are each designed as a metal body on which the clamping lever is guided by means of a guide surface, wherein at least the part of at least one clamping lever that bears the guide surface is formed from a metal part, and wherein the metal body of the thrust bearing has a lower hardness than the metal part of the clamping bar.

With the embodiment according to the invention, the wear occurring between the clamping lever and the thrust bearing as a result of the movement is moved onto the thrust bearing. The thrust bearing can be replaced in a simple and cost-effective manner, so that it can be easily maintained. In particular, two clamping levers are usually supported on the thrust bearing in each case in order to hold the thrust bearing in the neutral position when the control device is not under load. Since there is then no or only little wear on the clamping lever, the thrust bearing has to be replaced only in the case of maintenance. Thus, an abrasion-optimized design is achieved.

According to a preferred variant of the invention, it can be provided that the clamping lever is made of stainless steel, in particular chrome-nickel steel. In this embodiment, wear on the clamping lever or the clamping levers is virtually eliminated.

In particular, a simple production of the clamping bar is achieved if the clamping bar is designed as a stamped part made of a sheet metal part and one side of the clamping bar forms a sliding surface which rests on a mating surface of the carrier to form a sliding bearing. In addition, the clamping rod can be guided in this way in a stable and precise manner.

In particular, it can also be provided that the carrier is produced as a diecast component, preferably as a zinc diecast part.

In the case of a carrier with a base part which comprises a through-opening, the actuating device being supported on the base part in the region of the through-opening, and a support being molded on the base part, the support projecting from the base part and the clamping bars being held on the support, it is now possible in a simple manner to orient the clamping bars precisely matched to one another and to the bearing.

The control device according to the invention can be characterized in that the clamping lever has a bearing receptacle, to which the lever arms are each 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, such that the clamping lever has a bearing receptacle, into which a bearing piece, preferably made of the same material as the clamping lever, preferably stainless steel, engages.

If the bearing part is made of the same material as the clamping lever, a uniform wear is caused on both components. An optimized service life is thereby achieved, and both components can be replaced simultaneously in the event of maintenance. If the bearing parts are made of stainless steel, the loads occurring there can be reliably captured and carried away. In the event of high stresses, in particular in the event of incorrect operation, there is no need here to worry about bearing failure. If the clamping lever and the bearing piece are made of stainless steel, a particularly rigid mechanical composite body is achieved by means of this material combination, via which, on the one hand, the existing load forces can be transmitted without deformation and, on the other hand, surprisingly a very long service life can be achieved.

According to the invention, it can also be provided that the bearing receptacle of the clamping lever is configured as a laterally open receptacle. The clamping lever can be simply mounted, wherein the clamping lever is pushed with its bearing receptacle laterally onto the bearing piece. Since the clamping lever is in the spring-biased condition, it is reliably pressed against the bearing element and is held thereon for the formation of a rotary bearing.

In order to achieve low component and assembly costs, it can be provided that the bearing part is pressed into the bore of the holder and has a molded head which is supported on the side of the clamping lever facing away from the holder and thus holds it in a form-fitting manner.

According to the invention, it can also be provided that the first actuating unit and/or the second actuating unit are each held pivotably on opposite sides on the carrier by means of a bearing element, wherein the bearing element has a threaded section and a bearing section connected to the threaded section, wherein the threaded section is screwed into the carrier and the bearing section is inserted into the bore receptacle so as to form a pivot bearing, and wherein the bearing elements each have a tool receptacle, preferably an internal hexagon or a mitre drive, which can be actuated from outside the carrier. In this way, a simple support of the operating unit can be achieved. The support of the actuating unit can be adjusted without play via the threaded section. If the threaded section is centered and in driving alignment with the bearing, the two regions of the bearing element can be produced in the recess in a simple and precisely matched manner in a cutting process on a turning machine. In this case, it can be provided in particular that the bearing section is finish-turned. In this way, the grinding process for producing the bearing section can be dispensed with. The use of a tool receptacle in the form of an internal hexagon and in particular in the form of a mitre head drive makes it possible to automatically and precisely adjust the bearing play.

In a preferred variant of the invention, the bolts are held or molded on at least one part of the drive units of the two actuating units, and the bolts hold the thrust bearings by means of the fastening elements. The thrust bearing can now be replaced easily and quickly without problems, also manually by untrained personnel.

A further preferred embodiment of the invention provides that the thrust bearing is made of brass or a brass alloy and is preferably designed as a rolling body and is held rotatably on the screw. A very high service life for the thrust bearing is also achieved in the case of brass alloys. In the case of the use of rolling bodies, the frictional losses can be further reduced in accordance with the rotation of the clamping lever via the thrust bearing.

Drawings

The invention will be explained in more detail below on the basis of embodiments shown in the drawings. In which is shown:

figure 1 shows a perspective view of a control device for a working machine,

figure 2 shows the schematic view according to figure 1 from a different perspective,

fig. 3 shows a perspective view of components of the control device according to fig. 1, including an operating lever,

fig. 4 shows a further component of the control device according to fig. 1, including the component according to fig. 3,

figure 5 shows the assembly according to figure 4 in a modified mounting position,

figure 6 shows a perspective view from below of the detail in figure 1,

figure 7 shows an electric switch unit for mounting to the control device according to figure 1,

figure 8 shows an exploded view of the electric switch unit according to figure 7,

fig. 9 and 10 show perspective views of an adapter of the switching unit according to fig. 7 and 8, an

Fig. 11 and 12 show perspective views of the contact carrier of the switching unit according to fig. 7 and 8.

Detailed Description

Fig. 1 and 2 show a control device for a working machine (arbeitmaschine), which has a carrier 10, which can preferably be designed in one piece and can particularly preferably consist of a zinc die casting.

The carrier 10 has a base part 11, which forms a through-opening 11.1. Four brackets 12 are protrudingly mounted on the base member 11. In particular, the holder 12 is integrally molded onto the base part 11. The support 12 has two support surfaces 12.1, 12.2, respectively, which are arranged at an angle to one another, preferably at right angles to one another. As can be seen in fig. 2, the two support surfaces 12.1, 12.2 can be connected, for example, at the outer edges of the carrier 12.

An operating unit 40 can be fixed to the carrier 10. The operating unit 40 is explained in detail below with reference to fig. 3 to 5. As shown in fig. 3, the operating unit 40 has a coupling element 53. The coupling element 53 has a receptacle 54. The actuating lever 50 can be fastened to or in the receptacle 54. The actuating lever 50 has a connecting section 52 next to the receptacle 54, which merges into the fastening piece 51. A handle knob may be fixed to the fixing member 51. The operating rod 50 may be bonded or screwed with the coupling member 53.

The coupling element 53 has two bearing projections 55 on opposite sides. The bearing projection may be molded onto the coupling element 53 in one piece.

As can be seen in fig. 4, the first actuating unit 60 is pushed onto the coupling element 53. The first actuating unit 60 has a bridge 61 which surrounds a receptacle for the coupling element 53. In the drawing according to fig. 4, the coupling element 53 is inserted into the receptacle from below. Where the bearing projection 55 engages into a recess of the bridge 61. The bridge 61 has two guide surfaces 66 arranged at a distance from one another in the region of the receiving section, between which the coupling element 53 is received. If the coupling element 53 is moved (for example due to a manipulation on the operating lever 50), the coupling element 53 pivots about a pivot axis formed by the two bearing projections 55. The coupling element 53 is guided on two guide surfaces 66.

On the bridge 61, a drive unit 62 is molded on the opposite side. Each drive unit 62 has a toothed segment 63, which, as shown in fig. 4, can be curved. In the region of the free end of the drive unit 62, the screw 64.1 is pressed into a bore of the drive unit 62 or screwed into a threaded receptacle. A thrust bearing (St ü tzlager)64 in the form of rolling bodies is pushed onto the bolt 61. Where the thrust bearing 64 may be rotated onto the bolt 64. The thrust bearing 64 is fixed by means of a fixing element 65, for example a snap ring.

As can be seen in fig. 4, a screw receptacle 67 is introduced into the bridge 61. Two screw receptacles 67 are provided on each side of the bridge 61, respectively, which are adjacent to the bearing projection 55. The bearing tabs 55 project a distance beyond the bridge 61. As can be seen in fig. 5, the bearing plate 90 is therefore pushed onto the bearing projection 55 by means of the bearing opening, so that a pivot bearing for the coupling element 53 is formed. The bearing plate 90 is fastened by means of a fixing screw 91 which passes through the screw receptacle of the bearing plate 90 and is screwed into the screw receptacle 67 of the bridge 61.

Fig. 4 also shows that the second actuating unit 70 can be pushed onto the first actuating unit 60 from above.

The second actuating unit 70 has a connecting element 71, which connects the two drive units 73 to one another. The connecting piece 71 has an arc-shaped slit which laterally delimits the guide surface 72. The second manipulating unit 70 may be strung on the operating lever 50 by means of a slit.

The connecting element 71 carries two drive units 73 as described above, wherein the drive units 73 are preferably connected in one piece to the connecting element 71. The two drive units 73 in turn have teeth 74, which are preferably designed in the form of an arc, as shown in fig. 4. As in the case of the first actuating unit 60, the screw 75.1 is also pressed or screwed into the bore of the drive unit 73 on the second actuating unit 70. The bolts 75.1 carry thrust bearings 75, respectively. The thrust bearing 75 is constructed identically to the thrust bearing 64 and is fastened to the screw 75.1 by means of a fastening element 76.

The four thrust bearings 64, 75 may be constructed of brass or a brass alloy, for example.

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 hole receiving portions 77 are aligned with each other. As can be seen in fig. 4, the first actuating unit 60 has bore receptacles 68 on opposite sides, which are likewise aligned with one another.

For mounting the actuating unit 40 shown in fig. 4, the actuating unit is arranged in the through-opening 11.1 of the base part 11. In this case, the aforementioned bore receptacles 68, 77 are aligned with the threaded receptacles of the base part 11. In which the bearing element 14 can be screwed. For this purpose, the bearing element 14 has a threaded section, on which a head having a tool receptacle, in particular a round-head (Torx) tool receptacle, is integrally molded. The bearing element 14 has a one-piece molded bearing pin aligned with the threaded section. When the bearing element 14 is screwed with its threaded section into the threaded receptacle of the base part 11, the bearing pin now penetrates into the corresponding bore receptacle 68, 77 of the first actuating unit 60 or the second actuating unit 70. In this way, the bearing element 14 is screwed from all sides of the base part 11. The bearing element 14 can be fixed by means of nuts 15, 16, which are screwed onto the threaded section of the bearing element 14 and clamped relative to the base part 11. Accordingly, the first and second actuating units 60, 70 are each held pivotably about an axis on the base part 11. The axis about which the first manipulation unit 60 is pivotable is perpendicular to the axis about which the second manipulation unit 70 is pivotable. Furthermore, the two pivot axes are in parallel or exactly the same plane as each other. In this way a universal joint is formed. Due to the simplified installation, provision is made for the second handling unit 70 to be first of all built into the carrier 10. The structural unit according to fig. 3 can then be pushed from below into the carrier 10 together with the first handling unit 60. Where the operating rod 50 moves into the gap formed between the guide surfaces 72.

As can be seen in fig. 1, the slide 80 is pushed onto the operating lever 50. For this purpose, the slide 80 has a bore which surrounds the actuating rod 50 at the connecting section 52 of the actuating rod. The slider 80 is pushed onto the coupling element 53 so that it is located between the two guide surfaces 72 of the second actuating unit 70. When the operating lever 50 is moved, the slider 80 slides on an arc-shaped rail between the two guide surfaces 72.

As can be seen in fig. 1, two clamping levers 20 are each pivotably supported on a carrier 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. The bearing receptacle 24 can be seen in fig. 6. As shown, the bearing receptacle 24 is open to one side of the clamping lever 20.

Fig. 6 also shows that the clamping lever 20 is connected to the support 12 by means of a bearing element 13. The bearing member 13 has a bearing bolt. The bearing bolts are pressed into the holes of the bracket 12. The bearing piece 13 also has a head 13.1. In the mounted state of the bearing piece 13, the bearing piece is spaced from the inner surface of the carrier 12. Between this inner surface and the underside of the head 13.1, the clamping lever 20 is pushed laterally onto the bearing piece 13. The pivot bearing is thus formed by the bearing bolts of the bearing piece 13 and the bearing receptacle 24.

As shown in fig. 6, a guide surface 23 is molded on the lever arm 22. The clamping bar 20, which is fixed to the adjacent holder 12, rests on the thrust bearing 64 or the thrust bearing 75 on the opposite side. In this way all four thrust bearings 64, 75 between every two clamping bars are protected.

The clamping lever 20 can be clamped by means of the clamping device 30 such that the guide surface 23 bears against the thrust bearings 64, 75 under spring bias.

The clamping device 30 has two coupling elements 31, wherein each coupling element 31 is supported on a screw 33 of the clamping bar 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 element 31 on the two bolts 33. In this way, a force is introduced into the lever arm 21 of the clamping lever 20 via the bolt 33. This force is transferred into the second lever arm 22, so that it bears elastically pretensioned against the thrust bearing 64 or 75. The drawing shows the clamping device holding the operating unit 40 in its neutral position.

According to the invention, the thrust bearings 64, 75 are made of a metal having a lower hardness than the clamping bar 20. Preferably, the clamping bar 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 bar 20.

If the operating lever 50 is moved, the first and second manipulating units 60 and 70 are pivoted according to the moving direction of the operating lever 50. As the actuating unit 60, 70 is moved, the drive unit 62, 73 is also moved out of the neutral position shown in the drawing. If the rear drive unit 62, as shown for example in fig. 6, is pivoted to the left in the plane of the drawing, the left-hand lever arm 22 of the clamping lever 20 is pivoted counterclockwise and the right-hand lever arm 22 of the clamping lever 20 likewise follows counterclockwise to the left, so that the guide surfaces 23 of the two clamping levers 20 remain resting against the thrust bearing 64.

If the user releases the operating lever 50, the clamping device 30 returns the drive unit 62, 73 to the neutral position again via the clamping lever 20 and the thrust bearing 64, 75.

In fig. 7 to 9, a switch block is depicted, which can be mounted on the operating unit 40 according to fig. 1 to 6. Such a switch block can be mounted laterally, in particular 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.

As shown in fig. 1, the switch block has an adapter 110 on which contact units with contact carriers 130 are arranged in sequence. Opposite the adapter 110, a closure 170 is mounted on the last contact unit of the contact unit array. Opposite the closure member, the switch block is closed by means of a connecting piece 200.

An exploded view of the switch block is shown in detail in fig. 8. The structure of the adapter 110 is first described with reference to fig. 9 and 10.

As shown, the adapter 110 may be configured in a flat plate shape. The adapter has a first connection region 111. The connection region 111 may have a flat connection surface. A screw receptacle 112, on which an electrical line can be fastened, passes through this connection region 111.

The orientation elements 113.1 and 113.2 protrude on the outside of the connection region 111. A recess 115 is recessed in the connection side where the connection region 111 is formed.

In the region of the recess 115, a dome 115.1 with a helical receptacle is arranged. The recess 115 is laterally delimited by a spacer 115.3, which at least partially surrounds it.

In the connecting region 111, electrical components, in particular potentiometers of different design, can be mounted. Accordingly, the adapter 110 forms a common piece for accommodating different electrical structural units. For example, an electrical component is placed with a flat connection surface on the flat surface of the connection region and is oriented in a precisely matched manner on the orientation elements 113.1, 113.2. It is also conceivable to use a plurality of electrical structural units which have a perfectly circular connecting region. The electrical structural unit can be placed on the pad 115.3 by means of the connection region. The electrical structural unit can also be supported on the dome 115.1 and positioned with an exact fit. The fixing can be made via a screw receptacle in the dome 115.1.

Fig. 9 and 10 also show that the adapter 110 has a screw receptacle 115.4, which passes through the adapter 110. The adapter 110 is also provided with a through-opening 115.2.

Fig. 9 can see the back side of the adapter 110. As the drawing shows, the adapter 110 forms a second connection region 116 on the rear side. The second connection region 116 forms a sequentially arranged side. Two protruding portions 114 protrude from the sequentially arranged side. The projection 114 is advantageously connected in one piece with the adapter 110. The adapter 110 is particularly preferably designed as a plastic casting.

The projection 114 in this embodiment has, for example, a right circular cross section. Other cross-sections are conceivable.

Furthermore, a fastening receptacle 132.2 is recessed in the sequential side of the adapter 110. According to a variant of the invention, the fastening reception 132.2 has a cross section which differs from the cross section of the projection 114. In this embodiment, the fastening reception 132.2 has a triangular cross section.

As can be seen in fig. 8, a screw 120 can be inserted through the screw receptacle 115.4 of the adapter 110. The contact carrier 130 may also be strung on the screw 120.

The design of the contact carrier 130 can be seen in detail in fig. 11 and 12. As shown in the drawing, the contact carrier 130 has two side walls 131, 132 spaced parallel to each other. The sidewalls 131, 132 form a sequentially arranged face on opposite outer sides. The side walls 131, 132 are connected to each other in one piece via a lateral wall element 133 and a bottom 134. In this way an upwardly open housing structure is obtained. The wall element 133 and the bottom 134 extend between the side walls 131, 132 and thus in the sequential alignment direction.

In the region of the base 134, a bulge 134.1 is provided. The ridge 134.1 is penetrated by the screw receptacle 135. The longitudinal center axis of the screw receptacle 135 extends in the sequential alignment direction. Furthermore, the two side walls 131 and 132 are also penetrated by screw receptacles 131.3, 132.3, which are aligned with one another at corresponding positions in the two side walls 131 and 132.

Fig. 11 shows that a projection 132.1 projects on one of the two side walls 132. In addition or alternatively, it can also be provided that at least one fastening receptacle 132.2 is recessed into the side wall 132.

The projection 132.1 has a circular cross section in this embodiment. The cross section is preferably selected to correspond to the cross section of the projection 114 of the adapter 110. More preferably, the projections 132.1 are also arranged at a distance from one another to the same extent as the projections 114. The fastening receptacle 132.2 also corresponds to the configuration of the fastening receptacle 132.2 in the adapter 110.

According to fig. 12, fastening tabs 131.2 are arranged on the opposite side walls 131. Additionally or alternatively, one or more centering receptacles 131.1 can also be introduced into the side wall 131.

As can be seen in the figures, a longitudinal middle plane is formed between the outer sides of the side walls 131, 132, which longitudinal middle plane is parallel to the outer sides. According to the invention, the centering receptacle 131.1 is arranged in a symmetrical position with respect to the projection 132.1 with respect to the middle transverse plane. The projection 132.1 is configured such that its outer contour is smaller than or equal to the inner contour of the centering receptacle 131.1. This enables a plurality of structurally identical contact carriers 130 to be arranged in succession on the side of the succession, as shown in fig. 8. When the contact carriers 130 are arranged one behind the other, the projections 114 engage in corresponding centering receivers 131.1 and fastening projections 131.2 and fastening receivers 132.2. In this way the contact carriers 130 are arranged in an exact-fitting sequence. This prevents a movement transverse to the alignment direction in a form-locking manner. Furthermore, rotation about an axis transverse to the direction of sequential alignment is likewise prevented.

The contact carrier 130 can be threaded onto the screw 120 with its screw receptacles 131.3 and 135. In the on-string state, the first contact carrier 130 is likewise 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.

As shown in fig. 8, the cam tube 160 can be inserted into the through-opening 115.2 of the adapter 110 in a rotatable manner. 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-opening 115.2.

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

The cam disks 150.1, 150.2 are connected to a cam tube 160. The cam plate is pushed laterally onto the cam tube 160 and is threaded therewith. The cam disks 150.1, 150.2 are partially inserted with their outer circumference into the contact carrier 130. Guide elements can be inserted into the contact carrier 130, which guide the outer circumference of the cam disks 150.1, 150.2.

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

The housing part 140 is a component which carries electrical switching contacts, in particular electrical double contact elements.

The housing part 140 can be connected to the contact carrier 130 by means of snap elements 142 to form a contact unit. The embodiment is described here in which the latching elements 142 can be released transversely to the sequential alignment direction. In fig. 8, the housing part 140 can thus be released from the contact carrier 130 transversely to the sequential alignment direction, even if the contact carriers are in the sequential alignment. This simplifies maintenance of the electrical contacts in the housing member 140.

As can be seen in fig. 8, a closure 170 is provided, which can be configured in the form of a sheet-metal piece. A spacer 174 is fastened, preferably riveted, to the closure 170 on one side. A screw receptacle 172 is also machined into the closure 170, which screw receptacle is aligned with the screw receptacle 115.4 of the adapter 110. Therefore, the screw 120 can also be guided by the screw receiving portion 172.

The closure 170 has an attachment face 173. The connecting surface 173 of the closing part 170 rests on the outer side of the last contact unit, in particular on the outer side of the last contact carrier 130 of the arrangement of contact carriers 130. The closure member 170 in turn has a central through-section 171 through which the cam tube 160 passes.

The spacer 174 has a screw receptacle into which the two screws 120 are screwed. The remaining screw receptacles 172 in the closure part 170 have a thread into which the other two screws 120 are screwed.

A connector 200 may be secured to the closure member 170. The connector 200 may likewise be configured in the form of a flat plate. The connector 200 may be placed on the spacer 174. Because the spacer 174 is provided with a screw receptacle, the connector 200 can be screwed with the spacer 174 and with the closure 170. For this purpose, a corresponding screw receptacle is provided in the connecting piece.

A gap is formed between the closure member 170 and the connector member 200. In this gap a snap disc 190 is arranged. The snap disk 190 has a central receptacle 191 which is aligned with the through-opening 201 of the connecting element 200. The drive shaft 210 can be pushed through the through-opening 201, further through the sleeve 202 and inserted into the receptacle 191 of the snap disk 91, wherein a rotationally fixed connection is formed here. Furthermore, the drive shaft 210 can then be pushed into the cam tube 160, wherein a rotationally fixed connection is also formed here. The drive shaft 210 has a gear holder 211. The gear wheel, not shown, is fixed in a rotationally fixed manner on the gear wheel carrier.

A snap rod 180 is also installed in the gap between the closure 170 and the connector 200. In this embodiment two snap levers 180 are used, arranged on opposite sides of the snap disc 190. The engaging rod 180 has a bearing receiving portion 181. The latching lever 180 is mounted with the bearing receptacle 181 on the spacer element 174 in the lower region of the closure part 170. In this way, a pivot bearing for the catch lever is realized, wherein the pivot axis extends in the sequential direction.

The snap rod 180 also has a snap element receiving portion 162. At least one of the snap-in levers 180 carries a snap-in element 183 in the form of a rolling body. The rolling bodies are designed and dimensioned in such a way that they can run on the circumferential engagement contour of the engagement disc 91, so that a defined engagement position is formed.

The catch lever forms a spring bracket 184 on its side facing away from the bearing receptacle 181. A spring 185 is fixed to the spring support 184. The spring 185 is configured as a tension spring which pulls the two catch levers 180 against the (gegen) catch disk 190 and thereby exerts a spring pretension.

For fastening the switch block shown in fig. 7, the switch block is slipped onto one side of the fastening unit according to fig. 1 by means of a connecting element 200. This side of the fastening unit is formed by the support surfaces 12.1 of the adjacent brackets 12. The connector 200 can be screwed to the bracket 12 by means of a set screw.

The gears fixed to the gear holder 211 of the switch block are engaged with the teeth 63, 74 of the corresponding drive units 62, 73.

If the operating lever 50 is actuated, the rotary movement of the toothed segment 63 is thus transmitted via the gear wheels of the gear carrier 211 into the drive shaft 210. 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 disks 150.1, 150.2 also rotate, so that the switching contacts in the housing part 140 can be closed or opened. By means of the cam tube 160, an electrical switching unit, for example, a drive mechanism of a potentiometer, which is connected to the adapter 110 on the outside, can also be driven in the region of the adapter 110.

The stepwise adjustment of the operating lever 50 can be predetermined via the catch lever 180 and the catch disk 190.