Combination of a dozer blade with a trailer coupling

Abstract

Combination of a dozer blade (100) with a trailer coupling (200), wherein the dozer blade (100) has a front side (110) for performing dozer work and a rear side (120), and the trailer coupling (200) has a fastening device (210) for fastening to the dozer blade (100), wherein the trailer coupling (200) and the dozer blade (100) are arranged and designed such that the trailer coupling (200) can be fastened to the front side (110) of the dozer blade, characterized in that the fastening device (210) of the trailer coupling (200) and the dozer blade (100) are designed and arranged such that the trailer coupling (200) is fastened to the dozer blade (100) on the rear side of the dozer blade (100) at a distance from the rear side of the dozer blade (100), and that the distance is at least 20 cm, more preferably at least 30 cm and preferably approximately 40 cm.

Description

[0001] From WO 95 / 15421, it is known to attach a trailer coupling to a dozer blade. To ensure that the trailer coupling does not interfere with grading work, the prior art proposes designing the trailer coupling so that it is easy to remove. According to the prior art, the trailer coupling consists of a compact, commercially available device used on trucks. Such trailer couplings have a solid base plate that is attached to the truck or to the front of the dozer blade with several screws. To remove the trailer coupling, fastening screws are loosened, allowing the dozer blade to be used for grading work without the trailer coupling getting in the way.

[0002] The well-known dozer blade has the disadvantage that the attachment points on the dozer blade can become clogged with material during grading work, so that the material has to be removed to reattach the trailer coupling.

[0003] The invention is therefore based on the object of specifying a combination of a dozer blade with a trailer coupling, in which the trailer coupling can be easily and quickly attached to and removed from the dozer blade, wherein the attachment of the trailer coupling to the dozer blade can withstand high forces.

[0004] The object of the invention is achieved with a dozer blade according to the features of one of the independent claims. Advantageous embodiments of the invention are specified in the dependent claims.

[0005] According to one embodiment of the invention, a combination of a dozer blade with a trailer coupling is specified, wherein the dozer blade has a front side for carrying out dozing work and a rear side, and the trailer coupling has a fastening device for fastening to the dozer blade, wherein the trailer coupling and the dozer blade are arranged and designed such that the trailer coupling can be fastened to the front side of the dozer blade, wherein the fastening device of the trailer coupling and the dozer blade are arranged and designed such that the attachment of the trailer coupling to the dozer blade takes place on the rear side of the dozer blade at a distance from the rear side of the dozer blade.

[0006] According to the invention, the dozer blade can have an opening for receiving and passing through the fastening device of the trailer coupling.

[0007] According to one embodiment of the invention, a combination of a dozer blade with a trailer coupling, wherein the dozer blade has a front side for carrying out dozing work and a rear side, and the trailer coupling has a fastening device for fastening to the dozer blade, wherein the trailer coupling and the dozer blade are arranged and designed such that the trailer coupling can be fastened to the front side of the dozer blade, wherein the dozer blade has an opening for receiving and for passing through the fastening device of the trailer coupling.

[0008] According to the invention, the fastening device of the trailer coupling and the dozer blade can be arranged and designed such that the fastening device of the trailer coupling with the dozer blade is on the rear side of the dozer blade at a distance from the rear side of the dozer blade.

[0009] According to the invention, the distance is at least 20 cm, more preferably at least 30 cm and preferably approximately 40 cm.

[0010] According to the invention, the distance may be at most 70 cm, preferably at most 60 cm, more preferably up to 50 cm, preferably approximately 40 cm.

[0011] According to the invention, the dozer blade can have a single opening for receiving and passing through the attachment device of the trailer hitch. This has the advantage that the single opening is easier to clean when a trailer hitch is to be attached. This also has the advantage that the single opening can be more easily closed with a cover to prevent contamination when the dozer blade is to be used without a trailer hitch.

[0012] According to the invention, the opening for receiving and passing through the fastening device of the trailer coupling can be arranged in the middle of the dozer blade.

[0013] According to the invention, the opening for receiving and passing through the fastening device of the trailer coupling can be arranged centrally relative to the trailer coupling with respect to the longitudinal axis of the dozer blade when the trailer coupling is attached to the dozer blade. According to the invention, a receiving device corresponding to the fastening device of the trailer coupling can be provided on the rear side of the dozer blade for receiving the fastening device. If the combination also includes a cover device, the fastening device of the cover device is advantageously designed to correspond to the fastening device of the trailer coupling.

[0014] According to the invention, the receiving device can have a guide tube for receiving the fastening device of the trailer coupling or the cover device.

[0015] According to the invention, the fastening device of the trailer coupling can comprise a rod.

[0016] According to the invention, the fastening device can comprise a hollow square bar.

[0017] According to the invention, a passage can be provided at the end of the rod or the hollow square rod and passages can be provided at the end of the guide tube for receiving a fastening bolt.

[0018] According to the invention, the combination may further comprise a cover device having a fastening device corresponding to the fastening device of the trailer coupling, such that the cover device is interchangeable with the trailer coupling.

[0019] According to the invention, the cover device can have a cover surface whose size and shape corresponds to the opening (130) for receiving the fastening device (210) of the trailer coupling (200).

[0020] According to the invention, a self-propelled working device and / or an excavator with a combination according to the invention is also specified.

[0021] The invention is described in more detail below with reference to the embodiments shown in the figures. Fig. 1 shows a side sectional view of a combination of a dozer blade with a trailer coupling according to an embodiment of the invention. Fig. 2 shows a section of the combination of Fig. 1 in the direction of arrow II from Fig. 1. Fig. 3 shows a partial sectional view of the combination of Fig. 1 along lines III-III of Fig. 2. Fig. 4 shows a side sectional view of a combination of a dozer blade with a trailer coupling according to an embodiment of the invention. Fig. 5 shows a section of the combination of Fig. 4 in the direction of arrow V from Fig. 4. Fig. 6 shows a partial sectional view of the combination of Fig. 1 along lines VI-VI from Fig. 4. Fig. 7 shows a side sectional view of a combination of a dozer blade with a screen device according to an embodiment of the invention. Fig. 8 shows a section of the combination of Fig. 7 in the direction of arrow VIII from Fig. 7. Fig. 9 shows an exploded view of the combinations of Fig. 1, Fig. 4 and Fig. 7.

[0022] The following reference symbols are used in the description of the embodiments: 100 dozer blade 110 Front 120 back 130 opening 140 guide tube 141 rounds 150 fastening bolts 151 handle 200 trailer hitch 201 plate 202 Opening 203 ball head 204 Mouth 205 bolts 206 handle 210 Fastening device 211 rod 212 passage 213 bolts 214 plate 215 Mother 216 threaded hole 217 disc 218 disc 310 aperture device 311 rod 312 passage 313 aperture area

[0023] The Fig. 1 to 3 show a combination of a dozer blade with a trailer coupling according to an embodiment of the invention.

[0024] The dozer blade 100 has a front side 110 for performing dozer work and a rear side 120. An opening 130 is provided in the dozer blade 100.

[0025] At the rear of the dozer blade 100, a guide tube 140 is arranged, which has a free cross-section corresponding to the opening 130 and extends from the opening 130 to the rear, ie away from the rear side 120.

[0026] The guide tube 140 is designed as a hollow square tube. The side length of the preferably square cross-section can be a few centimeters, for example, 6, 8, 10, or 12 centimeters. Other suitable cross-sections are conceivable, such as rectangular, polygonal, or oval cross-sections. If rotation around the longitudinal axis is to be permitted, round cross-sections are also conceivable. In this case, the attachment should be designed such that rotation is permitted at least within a certain angular range, for example, + / - 45 degrees, + / - 30 degrees, or + / - 20 degrees.

[0027] The trailer coupling 200 has a ball head 203. Alternative designs of trailer couplings known to those skilled in the art are also suitable, such as trailer couplings with a jaw coupling, as in Fig. 4, which have a mouth 204 instead of the ball head 203.

[0028] The trailer coupling has a plate 201 in which four openings 202 are provided, through which bolts or screws 213 can be inserted to fasten the trailer coupling 200 to a fastening device 210. Alternatively, the trailer coupling 200 can also be formed as a single piece with the ball head 203 and the plate 201 and the fastening device 210, such that the bolt or screw connection between the plate 201 and the fastening device 210 can be omitted.

[0029] The fastening device 210 has a plate 214 and a rod 211 in which a passage 212 is provided.

[0030] Four threaded holes 216 are provided in the plate 214 of the fastening device into which the bolts 213 for fastening the trailer coupling can be screwed.

[0031] Alternatively, the plate 214 may also have holes through which the bolts 213 are inserted and secured with a nut according to the design of the Fig. 4 to 6 can be secured.

[0032] A receiving device for receiving the fastening device 210 of the trailer coupling 200 is provided on the rear side of the dozer blade 100. The receiving device comprises the guide tube 140, which is arranged behind the opening 130 in the dozer blade 100. Preferably, the inner cross-section of the guide tube 140 substantially corresponds to the outer cross-section of the fastening device 210.

[0033] At the end of the guide tube 140, passages 141 are provided through which a fastening bolt 150 for fastening the trailer coupling 200 to the dozer blade 100, which has a handle 151, can be inserted. For this purpose, the fastening device 210 is inserted into the guide tube 140 until the passages 141 in the guide tube 140 coincide with the passage 212 in the rod 211 of the fastening device, so that the fastening bolt 150 can be inserted through the passages 141 and the passage 212.

[0034] Optionally, the fastening bolt 150 may have an actuating member with which it can be locked.

[0035] The attachment of the trailer coupling 200 to the dozer blade 100 is carried out on the rear side 120 of the dozer blade 100 at a distance from the rear side 120 of the dozer blade 100.

[0036] The length of the guide tube 140 determines the possible distance for attaching the trailer coupling 200 behind the dozer blade 100. For example, the distance can be approximately 15 cm. Depending on the size and design of the combination, larger or smaller distances are conceivable, for example, approximately 10 cm, approximately 20 cm, approximately 30 cm, or approximately 40 cm. Larger distances such as approximately 50 cm, approximately 60 cm, or approximately 70 cm are also conceivable.

[0037] The trailer coupling 200 is attached at a distance behind the dozer blade 100, while the coupling element (ball head 203 or jaw 204) for coupling to the trailer is arranged in front of the dozer blade 100. This has the advantage that the fastening elements are less likely to become dirty during dozer work carried out without the trailer coupling attached.

[0038] The dozer blade 100 has a single opening 130 for receiving and passing through the fastening device 210 of the trailer coupling 200. This has the advantage that, to install the trailer coupling, only this single opening 130 needs to be cleaned of dirt generated during dozer work. Furthermore, no threads need to be exposed because the fastening is preferably made at a distance behind the rear side 120 of the dozer blade 100 using a fastening bolt 150.

[0039] The opening 130 for receiving and passing through the fastening device 210 of the trailer coupling 200 is arranged in the center of the dozer blade 100.

[0040] The Fig. 4 to 6 show an embodiment of the invention which corresponds to the embodiment of Fig. 1 to 3. Therefore, identical parts are provided with the same reference numerals and reference is made to their respective descriptions, so that only the differences need be described below.

[0041] The execution of the Fig. 4 to 6 has, instead of the trailer coupling 200 with a ball head 203, a trailer coupling 200 with a mouth 204 of a jaw coupling.

[0042] The jaw coupling has a bolt 205 having a handle 206. The bolt 205 can be used to secure a corresponding opening of the trailer in the jaw coupling, which opening is known to those skilled in the art.

[0043] The plate 201 of the trailer coupling is attached to the plate 214 of the fastening device 210 by bolts 213, which are secured with nuts 215 arranged on the back of the plate 214 of the fastening device 210. Washers 217 are arranged between the heads of the bolts 213 and the plate 201 of the trailer coupling 200. Optionally, washers 218 are provided between the nuts 215 and the plate 214 of the fastening device 210, which can also be integrated into the nut.

[0044] Alternatively, the attachment of the trailer coupling 200 to the fastening device 210 can also be carried out according to the design of the Fig. 1 to 3 can be carried out with a screw-threaded connection or another suitable connection known to those skilled in the art. Likewise, the trailer coupling can be formed as one piece with the fastening device.

[0045] The Fig. 7 to 8 show an embodiment of the invention which is similar to the embodiments of Fig. 1 to 3 or 4 to 6. Therefore, identical parts are provided with the same reference numerals and reference is made to their respective descriptions, so that only the differences need be described below.

[0046] The design of the Fig. 7 to 8 comprises a combination of a dozer blade 100 with a diaphragm device 310 which is arranged in the opening 130 and the guide tube 140 of the receiving device of the dozer blade.

[0047] The aperture device 300 has a fastening device 310 with a rod 311 and a passage 312, which corresponds to the fastening device 210 of the embodiments of the Fig. 1 to 3 or 4 to 6, so that the diaphragm device 300 can be provided in the dozer blade instead of the trailer coupling 200 for carrying out dozer work.

[0048] The cover device 300 has a cover surface 313, the size and shape of which corresponds to the opening 130 for receiving the fastening device 210 of the trailer coupling 200, so that the risk of contamination during leveling work can be minimized.

[0049] The opening 130 serves to receive and pass through the fastening device 210 of the trailer coupling 200. Since the opening has no thread and according to the design of the Fig. 7 to 8 or 9 can be closed with a cover device 300, this has the advantage that the opening 130 is easier to clean when the trailer coupling 200 is to be attached.

[0050] The Fig. Figure 9 shows a combination according to the invention comprising a dozer blade 100 according to one of the previous embodiments, a trailer coupling 200 according to the embodiment of Fig. 1 to 3, a trailer coupling 200 according to the design of the Fig. 4 to 6, and a diaphragm device 300 according to the embodiment of Fig. 7 to 8. Depending on requirements and applications, one of the trailer couplings 200 or the cover device 300 can be attached to the dozer blade 100.

Claims

[1] Combination of a dozer blade (100) with a trailer coupling (200), wherein the dozer blade (100) has a front side (110) for performing dozer work and a rear side (120), and the trailer coupling (200) has a fastening device (210) for fastening to the dozer blade (100), wherein the trailer coupling (200) and the dozer blade (100) are arranged and designed such that the trailer coupling (200) can be fastened to the front side (110) of the dozer blade, characterized by that the fastening device (210) of the trailer coupling (200) and the dozer blade (100) are designed and arranged such that the fastening of the trailer coupling (200) to the dozer blade (100) takes place on the rear side of the dozer blade (100) at a distance from the rear side of the dozer blade (100), and that the distance is at least 20 cm, more preferably at least 30 cm and preferably approximately 40 cm. [2] Combination according to claim 1, characterized by that the dozer blade (100) has an opening (130) for receiving and passing through the fastening device (210) of the trailer coupling (200). [3] Combination according to claim 1, characterized by that the distance is at most 70 cm, preferably at most 60 cm, more preferably up to 50 cm, preferably approximately 40 cm. [4] Combination according to one of the preceding claims, characterized by that the dozer blade (100) has a single opening (130) for receiving and passing through the fastening device (210) of the trailer coupling (200). [5] Combination according to one of claims 2 to 4, characterized by that the opening (130) for receiving and passing through the fastening device (210) of the trailer coupling (200) is arranged in the middle of the dozer blade (100). [6] Combination according to one of claims 2 to 5, characterized bythat the opening (130) for receiving and passing through the fastening device (210) of the trailer coupling (200) is arranged centrally to the trailer coupling (200) with respect to the longitudinal axis of the dozer blade (100) when the trailer coupling (200) is fastened to the dozer blade (100). [7] Combination according to one of the preceding claims, characterized by that on the rear side of the dozer blade (100) a receiving device corresponding to the fastening device (210) of the trailer coupling (200) is provided for receiving the fastening device (210). [8] Combination according to claim 7, characterized by that the receiving device has a guide tube (140) for receiving the fastening device (210) of the trailer coupling (200). [9] Combination according to one of the preceding claims, characterized by that the fastening device (210) of the trailer coupling (200) has a rod (211). [10] Combination according to one of the preceding claims, characterized by that the fastening device (110) comprises a hollow square bar. [11] Combination according to claim 9 or 10 as dependent on claim 8, characterized by that a passage (212) is provided at the end of the rod (211) or the hollow square rod and passages (141) are provided at the end of the guide tube (140) for receiving a fastening bolt (150). [12] Combination according to claim 1, further comprising a cover device (300) having a fastening device (310) corresponding to the fastening device (210) of the trailer coupling (200), such that the cover device (300) is interchangeable with the trailer coupling (200). [13] Combination according to the preceding claim, characterized bythat the cover device (300) has a cover surface (313) whose size and shape corresponds to the opening (130) for receiving the fastening device (210) of the trailer coupling (200). [14] Self-propelled working device and / or excavator with a combination according to one of the preceding claims.

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