CN212433649U

CN212433649U - Switch block for a control device of a work machine and contact unit for a work machine

Info

Publication number: CN212433649U
Application number: CN202020193473.9U
Authority: CN
Inventors: J·瓦格纳
Original assignee: Sborn & Burkhart Ltd
Current assignee: Sborn & Burkhart Ltd
Priority date: 2019-11-05
Filing date: 2020-02-21
Publication date: 2021-01-29
Anticipated expiration: 2030-02-21
Also published as: CN112783258A; DE102019129757A1

Abstract

The utility model relates to a contact unit for controlling means's of workover rig switch block and being used for workover rig, the switch block has the adapter, and it has the connection region on the opposite side, and first connection region is used for fixing on mechanical manipulation unit, and the first contact carrier of contact unit is indirect or the snap-on second connection region, and the contact unit bears at least one electric switch contact, and first contact carrier has two lateral walls. The first side wall has centering receptacles and the second side wall has projections, the adapter and/or the second contact carrier resting on the side wall of the first contact carrier such that at least one projection of the second side wall of the first contact carrier engages into a first side wall of a sequentially arranged second contact carrier or into a centering receptacle of the adapter and/or such that a projection of the second side wall of a sequentially arranged second contact carrier and/or into a projection of the adapter engages in a centering receptacle of the first side wall of the first contact carrier, so that a mechanical switching movement can be transmitted precisely into the contact unit.

Description

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

Technical Field

The utility model relates to a switch block for controlling means of workover rig, switch block have the adapter, and the adapter has the connection area on the opposite side, and wherein first connection area is used for fixing on mechanical manipulation unit, and wherein, the first contact carrier of contact unit fixes on the second connection area indirectly or directly, and the contact unit bears at least one electric switch contact, and wherein, the first contact carrier has two lateral walls, and two lateral walls include the outside that deviates from each other.

The invention also relates to a contact unit for a switch block of a control unit of a working machine, the contact unit carrying at least one electrical switch contact, wherein the contact carrier of the contact unit has two side walls, the two side walls comprising outer sides that diverge from one another, the outer sides forming a sequential arrangement side and the outer sides being arranged spaced apart from one another along a sequential arrangement direction, and wherein a longitudinal mid-plane is formed between the outer sides, which longitudinal mid-plane is parallel to the outer sides.

Background

Control devices for work machines, such as construction machines or cranes, are known from the prior art. Such a control device is also referred to as a gear lever and is used to control a function of the work machine.

Such control devices usually have a control unit which includes a mechanical (mecanisch) control device. The operating lever is fixed on a mechanical operating device and is provided with a handle. The user can specify the course of the movement of the work machine on the handle. The pivotably mounted actuating unit is moved when the handle is actuated. One or more switch blocks are mechanically coupled to the operating unit. The switch block is laterally mounted to the manipulation unit and includes at least one contact unit. The contact unit accommodates a switch contact. When the operating unit is operated, the switching contacts and the current circuit of the work machine are closed to control the function. The switching contact is usually actuated via a camshaft, which is driven by an actuating unit. It is common that a plurality of contact units are arranged in sequence with each other. The contact units are then driven by a common camshaft.

SUMMERY OF THE UTILITY MODEL

The object of the invention is to provide a switch block or a contact unit which makes it possible to transmit a mechanical switching movement precisely into the contact unit.

The object of the invention with regard to the switch block is achieved in that the first side wall of the contact carrier has one or more centering receptacles and the second side wall has one or more projections, so that the adapter and/or the second contact carrier arranged in succession in the sequence direction on the first contact carrier rests against one side wall of the first contact carrier, so that at least one projection of the second side wall of the first contact carrier engages into a centering receptacle of the first side wall of the second contact carrier arranged in succession or into a centering receptacle of the adapter arranged in succession, and/or in that a projection of the second side wall of the second contact carrier arranged in succession and/or into a projection of the adapter engages in a centering receptacle of the first side wall of the first contact carrier.

Thus, according to the invention, the contact unit can be mounted with its contact carrier on the actuating unit by means of an adapter, the contact unit being oriented precisely on the adapter via the projection, the fastening projection or the fastening receptacle. For example, if the adapter has a projection, the projection engages in a fastening receptacle of the adapter and thereby orients the contact carrier precisely relative to the adapter. If a further contact unit is mounted on the first contact unit, the two contact units can also be oriented precisely relative to one another in this case. For this purpose, the fastening projection of the contact carrier engages in a suitable centering receptacle of the adjacent contact carrier. It is thereby achieved that the two contact units are oriented precisely relative to one another. In this case, if the actuating movement is preset by the actuating unit, for example via a camshaft, the actuating movement is transmitted precisely into the contact unit or contact units. Thereby achieving more accurate contact control. In addition, the assembly is simplified, since the adapter and the contact unit can be brought into engagement with one another simply by means of a projection, a fastening projection or a fastening receptacle with an exact fit. The components can then be fixedly coupled to one another, for example by means of screws or similar retaining elements.

A particularly exact fit and exact orientation of the components can be achieved by providing at least two centering receptacles introduced into the outer side of the first side wall of the contact carrier and at least two projections projecting from the outer side of the second side wall. In particular, a torsion resistance of the components relative to one another is also achieved thereby. For example, the components can be blocked relative to one another in a form-locking manner transversely to the sequential alignment direction. On the other hand, the two components are also prevented from twisting relative to one another in a plane perpendicular to the sequential alignment direction and perpendicular to the axis of rotation of the actuating shaft, preferably the camshaft.

According to the invention, it can be provided that the first contact carrier and the second contact carrier are constructed structurally identically at least in the region with the centering receptacle and the projection. Thereby reducing component costs and installation costs. The structurally identical configuration allows for easy sequencing of the contact carriers. It is particularly preferably provided that the contact carriers are embodied identically in construction.

According to the invention, it can also be provided that, in addition to the at least one centering receptacle of the first side wall of the contact carrier or of the sequentially arranged contact carriers, a fastening projection is provided which projects from the outside of the first side wall and is machined into the outside of the second side wall of the contact carrier, and in the installed state the fastening projection engages into the fastening receptacle of the sequentially arranged contact carriers or of the adapters. This results in an engagement geometry between the successive contact carriers, which geometry achieves a further form-locking stabilization of the connection planes.

In this case, it is provided, if provision is made, that the fastening projection provided in addition to the at least one centering receptacle of the first side wall of the contact carrier or of the successive contact carriers has a cross-sectional geometry which differs from the cross-sectional geometry of the centering receptacle; and/or the fastening reception provided in addition to the contact carrier or at least one projection of the second side wall of the contact carrier arranged in succession has a cross-sectional geometry which differs from the cross-sectional geometry of the projection, in which case the exact positional correspondence of the contact carriers with respect to one another is further improved by the different cross-sectional geometry.

In order to form a stable contact carrier, it can be provided that the two spaced-apart side walls are connected by means of two side walls extending in the sequential alignment direction and a base. The side walls absorb the clamping forces which occur when the contact carriers are pulled toward one another or relative to the adapter in the sequential alignment direction by means of a clamping device, for example at least one clamping screw.

According to a further variant of the invention, it can be provided that the side walls have recesses which are aligned with one another and are used for the passage of the cam tube.

A particularly preferred variant of the invention provides that the contact unit has a contact carrier and a housing part, which are connected, preferably snap-fitted, to one another and which jointly enclose an accommodating space, in which at least one electrical switching contact and a rotatably arranged cam disk are arranged. The contact unit thus forms a closed housing in which the electrical switch contacts are fixedly mounted.

If provision is also made in such a switch block for the connection between the housing part and the contact carrier to be releasable transversely to the sequential alignment direction, the housing part can now be removed from the contact carrier for maintenance purposes without the contact carrier having to be removed.

The object of the invention is also achieved by means of a contact unit for a switch block of a handling unit, which contact unit is characterized in that the first side wall has one or more centering receptacles and the second side wall has one or more projections, wherein the centering receptacles are arranged in a symmetrical position with respect to a middle transverse plane with respect to the projections, and the projections are configured such that their outer contour is smaller than or equal to the inner contour of the centering receptacles. The above-described advantages are achieved by this embodiment, whereby a plurality of contact units can be arranged in sequence. Accordingly, mechanical ports are realized on the side walls, which enable the contact carriers to be arranged in a sequence with an exact fit.

A particularly preferred variant of the invention provides that at least two centering receptacles which are introduced into the outer side of the first side wall of the contact carrier and at least two projections which project from the outer side of the second side wall are provided, wherein the centering receptacles are arranged at a symmetrical position with respect to the middle transverse plane with respect to the corresponding projections, and the projections are configured such that the outer contour of the projections is smaller than or equal to the inner contour of the corresponding centering receptacles. The mechanical ports on the two side walls in this case effect a rotationally fixed assignment of the two contact carriers transversely to the alignment direction. Furthermore, a form-locking fastening of the contact carriers arranged one behind the other in a direction transverse to the direction of arrangement is achieved.

Drawings

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 detailed view 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 be formed from 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.

A handling unit 40 can be fixed to the carrier 10. The actuating unit 40 is explained in more detail below with reference to fig. 3 to 5. As shown in fig. 3, the actuating 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. The coupling element 53 is inserted in the receptacle from below in the drawing according to fig. 4. 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 is thereby pivoted about the pivot axis formed by the two bearing projections 55. The coupling element 53 is guided on two guide surfaces 66.

The drive unit 62 is molded on the opposite side on the bridge 61. 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, a screw 64.1 is pressed into a bore of the drive unit 62 or screwed into a threaded receptacle. A support bearing (St ü tzlager)64 in the form of rolling bodies is pushed onto the bolt 61. Where the support bearing 64 may be turned onto the bolt 64. The support 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 a screw receptacle of the bearing plate 90 and is screwed into a 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 each carry a support bearing 75. The support bearing 75 is constructed identically to the support bearing 64 and is fastened to the screw 75.1 by means of a fastening element 76.

The four

support 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, the bore receptacles 68 likewise being 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. The actuating lever 50 is here moved 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 the 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 fixed to the adjacent holder 12 rests on the opposite side on the support bearing 64 or the support bearing 75. In this way all four

support 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

support 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 with elastic pretension against the support bearing 64 or 75. The drawing shows the clamping device holding the operating unit 40 in its neutral position.

According to the present invention, the

support 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

support 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 lever arm 22 of the left-hand clamping lever 20 is pivoted counterclockwise and the lever arm 22 of the right-hand 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 support 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 clamp 20 and the support bearing 64, 75.

Fig. 7 to 9 show a switch block, which can be mounted on the actuating 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 actuating 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 in the drawings, 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 the connecting 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 screw 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 fastening can take place via screw receptacles 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 that 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, the screw 120 can be inserted through the screw receptacle 115.4 of the adapter 110. It is also possible to string the contact carrier 130 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 figures, the contact carrier 130 has two first and

second sidewalls

131, 132 spaced parallel to each other. The first and

second sidewalls

131 and 132 form a sequentially arranged surface on opposite outer sides. The first and

second side walls

131, 132 are connected to each other in one piece via lateral wall elements 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 first and

second side walls

131, 132 and thereby extend in the sequential direction.

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

Fig. 11 shows that the projection 132.1 projects on one of the two side walls (second side wall 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.

In this embodiment, the projection 132.1 has a right circular cross-section. 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 projections 131.2 are arranged on the opposite first side wall 131. Additionally or alternatively, one or more centering receptacles 131.1 can also be introduced into the first side wall 131.

As can be seen in the figures, a longitudinal middle plane is configured between the outer sides of the first and

second 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 at a symmetrical position with respect to the middle transverse plane with respect to the projection 132.1. 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. In the successive arrangement, the projections 114 engage in corresponding centering receivers 131.1 and fastening projections 131.2 and fastening receivers 132.2 in the successive arrangement of the contact carriers 130. 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 with its screw receptacles 131.3 and 135 onto the screw 120. 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 first sidewall 131 and the second sidewall 132 of the contact carrier 31.

The cam disks 150.1, 150.2 can be 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 member 140 in turn has wall elements which are aligned with the first and

second 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 first and

second 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 part. A spacer 174 is fastened, preferably riveted, to the closure 170 on one side. Screw receptacles 172 are also machined into the closure 170, which screw receptacles are aligned with the screw receptacles 115.4 of the adapter 110. The screw 120 can therefore also be guided by the screw receptacle 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 receiving portion 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.

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

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 in order to form a defined engagement position.

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.

Claims

1. A switch block for a control device of a work machine, the switch block having an adapter (110) with connection areas (111, 116) on opposite sides,

wherein the first connecting region (111) is intended to be fastened to a mechanical actuating unit (40),

wherein a first contact carrier (130) of a contact unit, which carries at least one electrical switch contact, is fixed indirectly or directly on the second connection region (116),

and wherein the first contact carrier (130) has two side walls, the outer sides of which face away from one another,

it is characterized in that the preparation method is characterized in that,

the first side wall (131) has one or more centering receptacles (131.1) and the second side wall (132) has one or more projections (132.1),

wherein the adapter (110) and/or a second contact carrier (130) arranged in series in a series arrangement direction on the first contact carrier (130) bear against a side wall of the first contact carrier (130),

so that at least one projection (132.1) of a second side wall (132) of the first contact carrier (130) engages into a centering receptacle (131.1) of a first side wall (131) of a second, sequentially arranged contact carrier (130) or into a centering receptacle of a sequentially arranged adapter (110),

and/or such that the projections (132.1) of the second side walls (132) of the second contact carriers (130) arranged in succession and/or the projections (114) of the adapter (110) engage in the centering receptacles (131.1) of the first side walls (131) of the first contact carriers (130).

2. The switch block according to claim 1, characterized in that the outer side of the first side wall (131) of the contact carrier (130) is provided with at least two centering receptacles (131.1) and the outer side of the second side wall (132) is provided with at least two projections (132.1) in a protruding manner.

3. The switch block according to claim 1, characterized in that the first and second contact carriers (130) are constructed identically at least at the region with the centering receptacle (131.1) and the projection (132.1).

4. The switch block according to claim 1, characterized in that, in addition to the at least one centering receptacle (131.1) of the first side wall (131) of the contact carrier (130) or of the sequentially arranged contact carriers (130), a fastening projection (131.2) is provided which projects from the outside of the first side wall (131) and a fastening receptacle (132.2) is machined in the outside of the second side wall (132) of the contact carrier (130), and in the mounted state the fastening projection (131.2) engages into the fastening receptacle (132.2) of the sequentially arranged contact carriers (130) or of the adapter (110).

5. Switch block as claimed in claim 4, characterized in that the fastening projection (131.2) provided in addition to the at least one centering receptacle (131.1) of the first side wall (131) of the contact carrier (130) or of the sequentially arranged contact carriers (130) has a cross-sectional geometry which differs from the cross-sectional geometry of the centering receptacle (131.1),

and/or that, in addition to the contact carrier (130) or at least one projection (132.1) of the second side wall (132) of the successive contact carrier (130), a fastening receptacle (132.2) is provided which has a cross-sectional geometry which differs from the cross-sectional geometry of the projection (132.1).

6. The switch block according to any one of claims 1 to 5, characterized in that two side walls spaced apart from each other are connected by means of two side walls (133) extending in the sequential alignment direction and a bottom (134).

7. The switch block according to any one of claims 1 to 5, characterized in that at least two screw receptacles (135) are provided on the contact carrier (130), which extend in a sequential alignment direction.

8. The switch block according to any one of claims 1 to 5, characterized in that the side walls have recesses (136) aligned with each other and for the passage of a cam tube (160).

9. The switch block according to one of claims 1 to 5, characterized in that the contact unit has a contact carrier (130) and a housing part (140), which are connected to one another and in that the contact carrier (130) and the housing part (140) jointly enclose a receiving space in which at least one electrical switching contact and a rotatably arranged cam disk (150.1, 150.2) are arranged.

10. The switch block of claim 9, wherein the contact carrier and the housing member are snap-connected to each other.

11. A switch block as claimed in claim 9, characterized in that the connection between the housing part (140) and the contact carrier is configured to be releasable transversely to the sequential alignment direction.

12. A contact unit for a switch block of a steering unit (40) of a work machine, the contact unit carrying at least one electrical switch contact,

wherein the contact carrier (130) of the contact unit has two side walls, the outer sides of which face away from one another, the outer sides forming a sequential side and the outer sides being arranged spaced apart from one another in a sequential direction,

and wherein a longitudinal mid-plane is formed between the outer sides, the longitudinal mid-plane being oriented parallel to the outer sides,

it is characterized in that the preparation method is characterized in that,

the first side wall (131) has one or more centering receptacles (131.1) and the second side wall (132) has one or more projections (132.1), wherein the centering receptacles (131.1) are arranged in a symmetrical position with respect to the projections (132.1) with respect to a middle transverse plane, and the projections (132.1) are configured such that their outer contour is smaller than or equal to the inner contour of the centering receptacles (131.1).

13. The contact unit according to claim 12, characterized in that at least two centering receptacles (131.1) are provided in the outer side of the first side wall (131) of the contact carrier (130) and at least two projections (132.1) are provided projecting from the outer side of the second side wall (132), wherein the centering receptacles (131.1) are arranged in a symmetrical position with respect to a middle transverse plane with respect to the corresponding projections (132.1) and the projections are configured such that the outer contour of the projections is smaller than or equal to the inner contour of the corresponding centering receptacles (131.1).

14. The contact unit according to claim 12, characterised in that a fastening projection (131.2) is provided in addition to the at least one centering receptacle (131.1) of the first side wall (131) of the contact carrier (130), which fastening projection projects from the outside of the first side wall (131), and a fastening receptacle (132.2) is machined in the outside of the second side wall (132) of the contact carrier (130), the fastening receptacle (132.2) being arranged in a symmetrical position with respect to the fastening projection (131.2) with respect to a middle transverse plane, and the fastening projection (131.2) being configured such that the outer contour of the fastening projection is smaller than or equal to the inner contour of the fastening receptacle (132.2).

15. The contact unit according to claim 14, characterised in that a fastening projection (131.2) provided in addition to at least one centering receptacle (131.1) of the first side wall (131) of the contact carrier (130) has a cross-sectional geometry which differs from the cross-sectional geometry of the centering receptacle (131.1),

and/or the fastening receptacle (132.2) provided in addition to the at least one projection (132.1) of the second side wall (132) of the contact carrier (130) has a cross-sectional geometry which differs from the cross-sectional geometry of the projection (132.1).

16. The contact unit according to any one of claims 12 to 15, characterized in that two side walls spaced apart from each other are connected by means of two side walls (133) extending in the sequential alignment direction and a bottom (134).

17. The contact unit according to any one of claims 12 to 15, characterized in that at least two screw receptacles (135) are provided on the contact carrier (130), which extend in a sequential alignment direction.

18. The switch block according to any one of claims 1 to 11, having a contact unit according to any one of claims 12 to 17.