Forward forklift

Abstract

The invention relates to a reach truck having a lifting gantry with a load receiving device, the lifting gantry being arranged on a sliding carriage, and the sliding carriage being arranged on a truck body of the reach truck so as to be movable in the longitudinal direction of the truck, at least one guide wheel being arranged on the sliding carriage, the sliding carriage is guided on a vehicle body through the guide wheel, the guide wheel is rotatably supported on an eccentric bolt arranged on the sliding carriage, the eccentric bolt is rotatably arranged in the sliding carriage around a longitudinal axis, and the eccentric bolt is in anti-torsion action connection with a retaining part. The holder is provided with a tool control surface, wherein the holder can be rotated about the longitudinal axis by fitting a tool with the tool control surface.

Description

TECHNICAL FIELD

[0001] The invention relates to a reach truck having a lifting mast with a load-receiving device, wherein the lifting mast is arranged on a push-trolley and the push-trolley is movably arranged on the vehicle body of the reach truck in the vehicle longitudinal direction, wherein at least one guide wheel is arranged on the push-trolley, by which the push-trolley is guided on the vehicle body, wherein the guide wheel is rotatably supported on an eccentric bolt arranged on the push-trolley, wherein the eccentric bolt is rotatably arranged in the push-trolley about its longitudinal axis, wherein the eccentric bolt is in a torsionally acting connection with a retaining element. BACKGROUND

[0002] In reach trucks in which the push-trolley is guided on the vehicle body in the vehicle longitudinal direction by means of a guide wheel, the guide wheel needs to be adjustable due to manufacturing tolerances of the vehicle body and the push-trolley. For this purpose, it is known to arrange the guide wheel rotatably on an eccentric bolt and to adjust the guide wheel by turning the eccentric bolt. In order to fix the eccentric bolt in its adjusted position after adjusting the guide wheel, a retaining element in a torsionally acting connection with the eccentric bolt is known to be fixed to the push-trolley by means of an anti-torsion device in order to prevent the eccentric bolt from being turned. In the known reach trucks, the adjustment of the eccentric bolt is laborious, since after releasing the anti-torsion device of the retaining element, a tool has to be inserted into the narrow gap between the push-trolley and the vehicle body in order for the tool to act on the outer hexagon of the eccentric bolt in order to turn the bolt in order to adjust the guide wheel of the push-trolley.

[0003] For turning the eccentric bolt, in the prior art reach trucks, an adjustment work has to be carried out on the retaining element and the eccentric bolt, wherein in particular the turning of the eccentric bolt by means of a tool acting on the eccentric bolt is laborious and cumbersome. SUMMARY

[0004] It is the task of the invention to provide a reach truck of the type mentioned at the outset, which enables an easy adjustment of the guide wheel on the push-trolley.

[0005] This task is solved according to the invention in that the retaining element is provided with a tool handling surface, by means of which the retaining element can be turned about the longitudinal axis by means of a tool cooperating with the tool handling surface.

[0006] Thus, in the invention, the retaining element can be turned and thus the eccentric bolt via the retaining element by means of a tool cooperating or acting on the tool handling surface of the retaining element, in order to adjust the guide wheel of the push-trolley. Thereby, an easy adjustment of the guide wheel on the push-trolley is achieved, since the adjustment of the guide wheel only requires an adjustment work on the easily accessible retaining element.

[0007] According to an advantageous embodiment of the invention, the tool handling surface is formed on a radial protrusion of the retaining element. Thereby, a torque can be easily exerted on the tool handling surface in order to turn the retaining element about the longitudinal axis.

[0008] According to an advantageous embodiment of the application, the eccentric bolt has a bearing section, by means of which the eccentric bolt is arranged rotatably in the receiving hole of the pusher carriage about the longitudinal axis, and a bolt-shaped holding section, which has an eccentricity relative to the bearing section and on which the guide wheel is rotatably mounted, wherein the holding element is in a torque-proof operative connection with the bearing section of the eccentric bolt. Thus, by means of a tool acting on the holding element, the position of the bearing section of the eccentric bolt in the receiving hole of the pusher carriage can be easily turned in order to adjust the guide wheel arranged on the bolt-shaped holding section.

[0009] According to an advantageous embodiment of the application, the guide wheel is arranged on the vehicle-outer-side outer surface (or outer side) of the pusher carriage and the holding element is arranged on the vehicle-inner-side outer surface (or outer side) of the pusher carriage. Thus, in order to adjust and turn the eccentric bolt, only the adjustment work has to be performed on the holding element arranged on the vehicle-inner-side outer surface of the pusher carriage, which can be performed with good accessibility. In the present application, in particular, it is not necessary to insert a tool into the narrow gap between the pusher carriage and the vehicle body, nor is it necessary to act on the eccentric bolt with a tool to turn the eccentric bolt.

[0010] According to an advantageous embodiment of the application, the holding element is torque-proof fixed to the bearing section of the eccentric bolt. Thereby, the eccentric bolt can be easily turned about the longitudinal axis by means of the holding element.

[0011] According to an advantageous embodiment of the application, the holding element is provided with a torque-transmitting recess, which can be inserted onto a complementary receiving portion on the bearing section of the eccentric bolt. By providing the holding element with a torque-transmitting recess and the bearing section of the eccentric bolt with a complementary receiving portion, the torque-proof connection of the holding element with the eccentric bolt can be realized with less structural effort.

[0012] According to an advantageous embodiment of the application, the holding element is torque-proof fixed to the pusher carriage about the longitudinal axis. Thereby, after adjusting the guide wheel, the holding element and further the eccentric bolt can be easily fixed against turning about the longitudinal axis on the pusher carriage.

[0013] According to an advantageous embodiment of the application, the holding element is torque-proof fixed to the pusher carriage by means of a securing screw received in a slot-like recess. By means of such a securing screw, a torque-proof of the holding element and further of the eccentric bolt can be realized with a simple structure, wherein the securing screw is also arranged on the vehicle-inner-side outer surface of the pusher carriage with good accessibility.

[0014] According to an advantageous embodiment of the application, the tool operating surface is configured as a spanner surface, on which a spanner can act. Such a tool operating surface can be manufactured on the holding element with little additional effort.

[0015] The invention provides a series of advantages.

[0016] The integration of the tool handling surface for turning the eccentric pin on the holding piece improves the accessibility and simplifies and improves the work flow for adjusting the push carriage guide wheels. Thus, the adjustment of the push carriage guide wheels can be simplified both at the time of assembly of the forklift truck and at the time of service and is performed from the inside of the push carriage with good accessibility.

[0017] By eliminating the outer hexagon, the eccentric pin can be simplified, whereby in the forward moving forklift truck according to the invention, the eccentric pin for the push carriage guide wheels has a smaller structural outlay. BRIEF DESCRIPTION OF DRAWINGS

[0018] Further advantages and details of the invention are explained in detail with reference to the embodiments shown in the drawings. In the drawings:

[0019] Figure 1 A forward moving forklift truck according to the invention is shown in a side view,

[0020] Figure 2 A forward moving forklift truck according to the invention is shown in a side view, Figure 1 A forward moving forklift truck according to the invention is shown in a side view, Figure 1 A forward moving forklift truck according to the invention is shown in a side view,

[0021] Figure 3 A forward moving forklift truck according to the invention is shown in a side view, Figure 1 2 A forward moving forklift truck according to the invention is shown in a side view,

[0022] Figure 4 A holding piece of a forward moving forklift truck according to the invention is shown. DETAILED DESCRIPTION

[0023] Figure 1 A forward moving forklift truck according to the invention is shown in a side view, Figure 2 A forward moving forklift truck according to the invention is shown in a side view,

[0024] The forward moving forklift truck 1 comprises a vehicle body 2 on which a lifting mast 3 is arranged longitudinally movably in the vehicle longitudinal direction L by means of a push drive device not shown in detail.

[0025] On the lifting mast 3, a fork carrier 4 is arranged liftable in the vertical direction V by means of a lifting hydraulic device not shown in detail.

[0026] On the fork carrier 4, a load receiving device 5 for receiving a load is arranged. The load receiving device 5 is composed, for example, of two fork tines 5a, 5b arranged at a distance from one another in the vehicle transverse direction Q, which fork tines are arranged on the fork carrier 4.

[0027] ​The vehicle body 2 is supported on the running surface by steerable drive wheels 10, which are preferably arranged centrally in the vehicle transverse direction Q, and two driven wheels 11a, 11b, which are arranged at a distance from one another in the vehicle transverse direction Q. The driven wheels 11a, 11b are arranged at the front end of wheel arms 2a, 2b of the vehicle body 2.

[0028] The lifting mast 3 is arranged on a push carriage 15, which is movably arranged on the vehicle body 2 of the front-moving fork lift truck 1 in the vehicle longitudinal direction L. For this purpose, two front guide wheels 16a, 16b and two rear guide wheels 17a, 17b are arranged on the push carriage 15 at a distance from one another in the vehicle transverse direction Q, by means of which the push carriage 15 is guided on the vehicle body 2 and can be moved in the vehicle longitudinal direction L. For this purpose, the wheel arms 2a, 2b can each be provided with a U-profile, which opens towards the vehicle interior, the legs of which are provided with corresponding upper and lower slides, between which the guide wheels 16a, 16b, 17a, 17b are arranged and supported.

[0029] In Figure 1 a side view, the driven wheel 11a on the wheel arm 2a and the guide wheels 16a, 17a of the push carriage 15, which are guided in the wheel arm 2a, are shown. The driven wheel 11b on the wheel arm 2b and the guide wheels 16b, 17b of the push carriage 15, which are guided in the wheel arm 2b, are arranged on the opposite vehicle side.

[0030] In Figure 2 two front guide wheels 16a, 16b are shown, by means of which the push carriage 15 is guided in the U-profiles of the wheel arms 2a, 2b.

[0031] In Figure 3 an embodiment according to the prior art, a push carriage 15 and its rear guide wheel 17a are shown.

[0032] The guide wheel 17a is rotatably supported on an eccentric bolt 20, which is arranged on the push carriage 15.

[0033] The eccentric bolt 20 has a bearing section 20a, by means of which the eccentric bolt 20 is rotatably arranged in the longitudinal axis L in a receiving hole 21 of the push carriage 15. The eccentric bolt 20 has a bolt-shaped retaining section 20b, which has an eccentricity with respect to the longitudinal axis L of the bearing section 20a. The guide wheel 17a is rotatably supported on this retaining section 20b.

[0034] The eccentric bolt 20 is in a torsionally resistant operative connection with a retaining piece 25. The retaining piece 25 is torsionally fixed about the longitudinal axis L on the push carriage 15 by means of a torsion protection.

[0035] In Figure 3In order to achieve a torque-proof connection of the eccentric bolt 20 to the holding piece 25, the holding piece 25 is provided with a torque-transmitting recess 26, for example a hexagonal recess, which can be inserted onto a complementary receiving portion 27, for example a hexagonal receiving portion, on the bearing section 20a of the eccentric bolt 20. A thread 28 is formed on the front end of the bearing section 20a of the eccentric bolt 20, onto which a fastening nut 29 can be screwed.

[0036] The anti-twist device of the holding piece 25 on the push carriage 15 is composed of an arcuately formed, elongated recess 30, which is arranged spaced apart from the recess 26, and a fastening bolt 31, which is received in the recess 30 and can be screwed into a not further shown threaded hole of the push carriage 15.

[0037] On the eccentric bolt 20 of the prior art, a stop flange 35 is formed between the bearing section 20a and the holding section 20b, which is configured as an external hexagon 36.

[0038] Figure 3 Only the rear guide wheel 17a is shown. The rear guide wheel 17b is configured in a similar manner and is adjustably arranged on the push carriage 15 by means of a corresponding eccentric bolt 20 and a corresponding holding piece 25.

[0039] In the assembled state, the push carriage 15 and its guide wheels 17a, 17b are guided in the wheel arms 2a, 2b, the guide wheels 17a, 17b and the external hexagon 36 of the eccentric bolt 20 being arranged on the vehicle-outer-side outer surface 15a of the vertically arranged flange plates 15c, 15d of the push carriage 15, while the holding piece 25, the fastening nut 29 and the fastening bolt 31 are arranged on the vehicle-inner-side outer surface 15b of the vertically arranged flange plates 15c, 15d of the push carriage 15.

[0040] The vertical flange plate 15c of the push carriage 15 is arranged here directly adjacent to the wheel arm 2a side and is provided with the guide wheels 16a, 17a. The vertical flange plate 15d of the push carriage 15 is arranged directly adjacent to the wheel arm 2b side and is provided with the guide wheels 16b, 17b.

[0041] In Figure 3In the prior art arrangement shown, to adjust the guide wheels 17a or 17b, a corresponding tool must be used to loosen the fastening nut 29 on the inner outer surface 15b of the sliding carriage 15, and the fastening bolt 31 of the anti-torsion device serving as the retainer 25 must also be loosened. Then, a corresponding tool must be inserted into the narrow gap between the outer outer surface 15a of the sliding carriage 15 and the wheel arm 2a or 2b, and this tool must be fitted onto the outer hexagon 36 of the eccentric bolt 20 to allow rotation of the eccentric bolt 20 to adjust the guide wheels 17a or 17b. After adjusting the eccentric bolt 20, the fastening bolt 31 and the fastening nut 29 must be tightened again. Therefore, to adjust the guide wheels 17a or 17b, adjustment work needs to be performed on the retainer 25 and the eccentric bolt 20, where, due to the narrow gap between the sliding carriage 15 and the corresponding wheel arm 2a or 2b, it is particularly laborious and cumbersome to apply a tool to the outer hexagon 36 of the eccentric bolt 20 to rotate it.

[0042] Figure 4 A retainer 25 is shown in a reach truck 1 according to the invention, which replaces [the previous method] in the reach truck 1 according to the invention. Figure 3 25.

[0043] Figure 4 Retainer 25 and Figure 3 The retainer 25 similarly has a notch 26 (e.g., a hexagonal notch) for transmitting torque, which can be fitted onto a complementary receiving portion 27 (e.g., a hexagonal receiving portion) on the support section 20a of the eccentric bolt 20 for the anti-torsional connection between the eccentric bolt 20 and the retainer 25.

[0044] exist Figure 4 In the retaining element, with Figure 3 Similar to the retainer 25, the anti-torsion device on the push carriage 15 consists of an arc-shaped, elongated notch 30 spaced apart from the receiving part 26 and a fastening bolt 31, which can be screwed into the threaded hole of the push carriage 32.

[0045] Figure 4 The retainer 25 is provided with a tool operating surface 40. In the illustrated embodiment, the tool operating surface 40 is configured as a fork-shaped wrench surface 41, and a tool 42 configured as a fork-shaped wrench 43 can act on and thus engage with this fork-shaped wrench surface (e.g., Figure 4 (As shown). The fork-shaped wrench face 41 is formed by two parallel outer surfaces 41a and 41b, which are formed on the radial protrusion 45 of the retainer 25.

[0046] By engaging the tool 42 with the tool operating surface 40 on the retainer 25, torque or leverage can be applied to the retainer 25 by means of the tool 42, and the retainer 25 can be rotated about the longitudinal axis L.

[0047] In the forward truck 1 according to the application, the eccentric bolt 20 is provided with a support section 20a, by means of which the eccentric bolt 20 is rotatably arranged in the receiving hole 21 of the push carriage 15 about its longitudinal axis L, and a bolt-shaped retaining section 20b, which has an eccentricity with respect to the longitudinal axis L of the support section 20a and on which the guide wheel 17a is rotatably supported. In the forward truck 1 according to the application, the external hexagon 36 is not required on the eccentric bolt 20, thereby reducing the complexity of the eccentric bolt 20 and making it less structurally complex. Figure 3 Similarly, the eccentric bolt 20 has a support section 20a, by means of which the eccentric bolt 20 is rotatably arranged in the receiving hole 21 of the push carriage 15 about its longitudinal axis L, and a bolt-shaped retaining section 20b, which has an eccentricity with respect to the longitudinal axis L of the support section 20a and on which the guide wheel 17a is rotatably supported. In the forward truck 1 according to the application, the external hexagon 36 is not required on the eccentric bolt 20, thereby reducing the complexity of the eccentric bolt 20 and making it less structurally complex.

[0048] Thus, in the forward truck 1 according to the application, the external hexagon 36 of the eccentric bolt 20 is replaced by a tool handling surface 40 formed on the retaining member 25 and thus integrated on the retaining member 25. Thereby, the structural complexity of the eccentric bolt 20 is simplified, and a simplified work flow and improved accessibility for adjusting the guide wheels 17a, 17b are achieved, as described below.

[0049] In the assembled state of the forward truck 1 according to the application, the push carriage 15 and its guide wheels 17a, 17b are guided in the wheel arms 2a, 2b, the guide wheels 17a, 17b and the retaining section 20b of the eccentric bolt 20 are arranged on the vehicle-outer-side outer surface 15a of the flange plates 15c, 15d of the push carriage 15, and the retaining member 20, the fastening nut 29 and the fastening bolt 31 according to Figure 4 are arranged on the vehicle-inner-side outer surface 15b of the flange plates 15c, 15d of the push carriage 15.

[0050] In the arrangement according to the application, in order to adjust the guide wheel 17a or 17b, the fastening nut 29 must be loosened on the vehicle-inner-side outer surface 15b of the push carriage 15 using a corresponding tool, and the fastening bolt 31 as a retaining member 25 anti-rotation device must be loosened. Subsequently, the corresponding tool 42, for example a forked spanner 43 according to Figure 4 can be brought to bear on the tool handling surface 40 of the retaining member 25 arranged on the vehicle-inner-side outer surface 15b of the push carriage 15 with good accessibility, and the retaining member 25 is turned about the longitudinal axis L by means of the tool 42 and the eccentric bolt 20 is turned by the anti-rotation action connection between the retaining member 25 and the eccentric bolt 20 in order to adjust the guide wheel 17a or 17b. After adjusting the eccentric bolt 20, the fastening bolt 31 and the fastening nut 29 can be tightened again. Thus, adjusting the guide wheel 17a or 17b requires only the adjustment work on the retaining member 25 and on the vehicle-inner-side outer surface 15b of the push carriage 15 and thus in the interior space of the push carriage 15, which has good and simple accessibility.

[0051] Thus, in the front-moving fork truck 1 according to the present application, easy adjustment of the guide wheels 17a or 17b on the moving carriage 15 is achieved, since for adjusting the guide wheels 17a or 17b only the adjustment work has to be performed on the holding member 25 arranged on the vehicle inner side outer surface 15b of the moving carriage 15, which is easily accessible.

Claims

1. A reach truck (1) having a lifting mast (3) with a load receiving device (5), wherein the lifting mast (3) is arranged on a push carriage (15), and the push carriage (15) is movably arranged on the vehicle body (2) of the reach truck (1) in the longitudinal direction (L), wherein at least one guide wheel (16a, 16b; 17a, 17b) is arranged on the push carriage (15), the push carriage (15) being guided on the vehicle body (2) by the guide wheel, wherein the guide wheel (16a, 16b; 17a, 17b) is rotatably supported on an eccentric bolt (20) arranged on the push carriage (15), wherein the eccentric bolt (20) is rotatably arranged in the push carriage (15) about a longitudinal axis (L), wherein the eccentric bolt (20) is connected to a retainer (25) in an anti-torsional manner, characterized in that, The retainer (25) is provided with a tool operating surface (40), wherein the retainer (25) can rotate about the longitudinal axis (L) by engaging the tool (42) with the tool operating surface (40).

2. The reach truck (1) according to claim (1), characterized in that, The tool operating surface (40) is formed on the radial protrusion of the retainer (25).

3. The reach truck (1) according to claim 1 or 2, characterized in that, The eccentric bolt (20) has a support section (20a) and a bolt-shaped retaining section (20b). The eccentric bolt (20) is rotatably arranged in the receiving hole (21) of the push carriage (15) about the longitudinal axis (L) via the support section. The retaining section has an eccentricity relative to the support section (20a) and a guide wheel (17a) is rotatably supported on the retaining section. The retaining member (25) is connected to the support section (20a) of the eccentric bolt (20) in an anti-torsional connection.

4. The reach truck (1) according to any one of claims 1 to 3, characterized in that, The guide wheel (17a) is arranged on the outer surface (15a) of the vehicle side of the push carriage (15), and the retainer (25) is arranged on the outer surface (15b) of the vehicle side of the push carriage (15).

5. The reach truck (1) according to claim 3 or 4, characterized in that, The retainer (25) is torsionally fixed to the support section (20a) of the eccentric bolt (20).

6. The reach truck (1) according to claim 5, characterized in that, The retainer (25) is provided with a notch (26) for transmitting torque, which can be inserted into the complementary receiving part (27) on the support section (20a) of the eccentric bolt (20).

7. The reach truck (1) according to any one of claims 1 to 6, characterized in that, The retainer (25) can be fixed to the push carriage (15) in a torsion-resistant manner around the longitudinal axis (L).

8. The reach truck (1) according to claim 7, characterized in that, The retainer (25) is fixed to the sliding carriage (15) in a torsion-resistant manner by means of a fastening bolt (31) received in an elongated recess (30) of the retainer (25).

9. The reach truck (1) according to any one of claims 1 to 8, characterized in that, The tool operating surface (40) is constructed as a fork-shaped wrench surface (41), and the tool (42) constructed as a fork-shaped wrench (43) can act on the fork-shaped wrench surface.

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