JP2010223428A - Traveling roller and object which can travel by the traveling roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a travelling roller equipped with a travelling roller body having a boss and a travelling roller shaft of a single component, for example in a vacuum cleaner, and having a structure assuring the function as the travelling roller and more advantageous for assembling a travelling rotor, regarding attachment of the travelling roller to an object. <P>SOLUTION: The object 1 is made to be able to travel by the travelling roller 15. The travelling roller 15 has the boss 20 penetrated by and engaged with the travelling roller shaft 22. The travelling roller shaft 22 is screwed and fixed by a thread parts 30, 31 formed on projection parts 28, 29 projecting from the both sides of the boss 20 so that it is engaged with a counterpart thread 35 in a holder 23 of the object 1. The travelling roller shaft 22 is smoothly formed in a cooperation part 27 with the boss 20, and is screwed/fixed in the holder 23. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a traveling roller in a vacuum cleaner, for example, having a traveling body having a boss and a single-component traveling roller shaft. In this case, the traveling roller shaft passes through the boss and the boss. This invention relates to a traveling roller having protrusions that protrude on both sides of the, and one of the protrusions is an insertion part and is provided with a thread.

  Furthermore, the present invention is an object that can be traveled by a travel roller, in which case the travel roller has a boss penetratingly engaged by the travel roller shaft, and the travel roller shaft projects from the boss on both sides of the boss. The present invention relates to an object that can be traveled by a travel roller, which is fixed in a holder of the object by a protruding portion.

  The above types of travel rollers or objects that can be traveled by travel rollers are known, for example, in vacuum cleaners, in particular in home vacuum cleaners. In this case, the running roller is arranged, for example, in the area of a nozzle that runs on the floor to be cleaned, and in some cases is formed as a running roller for a vacuum cleaner housing that can run on the floor. Has been. Furthermore, such travel rollers can be used in connection with vacuum cleaners in vacuum cleaners or cleaning devices that can run automatically, so-called suction / cleaning robots. The boss of such a traveling roller is preferably penetrated by a solidly formed traveling roller shaft, and the traveling roller shaft protrudes beyond the traveling roller on both sides and forms a protruding portion in the assembled state. These protrusions are in a holder on the apparatus side and hold the traveling roller. Furthermore, in this regard, it is known to form the travel roller shaft as an insertion shaft whose projection is fixed in the attached holder only by frictional coupling. Furthermore, a running roller shaft is known which has an external thread at one end so as to be screwed into a mating thread provided on the holder side.

  With respect to the above-described prior art, the technical problem of the present invention is that the above-described type of traveling roller or an object that can be traveled by the traveling roller is reliable in terms of mounting the traveling roller on the object, and more advantageous in handling technology. Is to form.

  This problem is first and essentially solved in the running roller of the type described at the outset by the subject matter of claim 1, in which case the other protrusion is also provided with a thread and the running roller. It is considered that the shaft is formed smoothly in the cooperating part with the boss. This problem is further solved by the subject of claim 2 in an object that can be traveled by a travel roller, in which case the travel roller shaft is screwed and fixed in the holder on both sides, in this case formed on the travel roller shaft. It is considered that the threaded part that engages is engaged in a mating thread formed in the holder. With this configuration, it is possible to achieve integral shape maintenance by frictional coupling of the traveling roller shaft on both sides of the traveling roller as viewed in the direction of the traveling roller shaft. The mounting of the travel roller via the travel roller shaft is reversible, and in this case, the mounting of the replacement travel roller can also be achieved with the travel roller shaft thus formed. The cooperating part formed between the projecting parts provided with the threads is formed into a non-threaded shape in order to cooperate with the boss on the traveling roller side, and correspondingly formed on a smooth surface. ing. Correspondingly, separate thread portions are formed on the end side of the traveling roller shaft, and the thread portions of the thread portions are preferably in the same direction.

  In the following, other features of the invention are also described in the description of the figures, often in the preferred context of the subject matter of claim 1 and / or other independent claims 2 or features of other claims. However, they also have meaning in the context of claim 1 and / or other independent claims 2 or each individual feature of each other claim, or each independently Good.

  The threads formed in both protrusions of the travel roller shaft may have the same diameter. However, it is preferred that the protrusions have threads with different diameters. That is, in this regard, it is further preferred that the screw thread attached to the plug-in part is selected smaller than the screw thread attached to the other protrusion. Thereby, correspondingly, also in the holder, selection of different diameters of the thread portions cooperating with the thread of the traveling roller shaft is performed. With this preferred form, the insertion part provided with a smaller thread diameter can be inserted without thread engagement in the holder thread part formed in front of the running roller in the insertion direction, This provides a method advantageous in handling technology. The rotational movement of the traveling roller shaft for fixing the traveling roller shaft is performed only after the leading thread portion passes through the boss of the traveling roller and engages with the thread portion of the attached holder. The That is, in another preferred embodiment, the outer diameter (nominal diameter) of the screw thread formed in the insertion portion is equal to the inner diameter (valley diameter) of the screw thread in the other protrusion on the opposite side, or Designed to be smaller than that.

  Both threads of the running roller shaft, which are axially spaced from each other, cooperate with the counter thread in the holder attached as intended, especially in configurations with different diameters. Both threads may be formed differently, i.e., for example as single or multiple threads, as pointed threads or trapezoidal threads, and with different slopes. A configuration is preferred in which both threads have the same slope, i.e., the same lead angle, and the same shape in the thread type. That is, in a preferred form, a lead angle of 5 ° -10 °, more preferably a lead angle of 8 ° -12 °, is provided, which is more preferred in the form of a right-hand thread for each thread.

  Furthermore, it can be seen that the form in which the counter thread in the holder is automatically formed during the screwing process of the travel roller shaft is advantageous in terms of manufacturing technology. For this purpose, the thread is formed in a helical form, for example as an automatic threading thread according to DIN 7998-4. Correspondingly, a smaller internal thread form separated in the region of the device-side holder is required, which is particularly advantageous in holders formed in plastic injection molding processes. The running roller shaft, whose thread has been screwed into the corresponding holder before the first use of the running roller, automatically cuts the mating thread correspondingly, and this mating thread is then It can also be used for other screwing processes (removing the running roller and possibly re-installing a new running roller).

  The travel roller has a width that is greater than the vertical height and correspondingly has an axial length that is greater than the diameter, resulting in a form that is at least similar to a barrel shape as a whole of the travel roller. In this regard, it is more preferable that the boss is formed so as to protrude beyond the running surface portion on both sides when viewed in the axial direction. The traveling surface portion of the traveling roller viewed in the axial direction is correspondingly selected to be smaller than the boss region of the traveling roller that cooperates with the smoothly formed traveling roller shaft cooperating portion. More preferably, starting from the barrel-shaped running surface part of the roller as a whole, the running roller forms a boss end part that extends conically with respect to the running roller axis on both sides in the axial direction towards the free end.

  It is advantageous in handling technology that a screw head is formed on one of the protrusions, which is provided with a protrusion on the side opposite to the insertion part of the traveling roller shaft and a screw thread having a larger diameter. More preferably, it is a protruding portion. In this case, the screw head may be a hexagonal screw head. As an alternative, the screw head may have a tool opening in the form of a slit, a cross slit or even a hexagonal recess.

  The travel roller shaft is more preferably a steel shaft, and is preferably made of high-grade steel that provides high wear resistance, high stability, and even corrosion resistance. The number of parts required to mount the travel roller on the object or device is small, which facilitates handling. Furthermore, the selected structure is cost effective. Due to the integral shape by frictional coupling on both sides of the running roller, there is no play on both protrusions of the running roller shaft. Mounting and disassembly is performed by a known screwing operation.

  In the following, the invention is explained in more detail by means of the accompanying drawings showing only two embodiments.

FIG. 1 is a perspective view of a vacuum cleaner provided with a floor cleaning adapter supported on a floor to be cleaned via a running roller. FIG. 2 shows an enlarged cross-sectional view according to section II of FIG. FIG. 3 shows the traveling roller shaft in a single perspective view. FIG. 4 shows another perspective view of the traveling roller shaft. FIG. 5 shows the traveling roller shaft in plan view. FIG. 6 shows a plan view corresponding to FIG. 5 for an alternative form of travel roller shaft. FIG. 7 shows a cross-sectional view similar to FIG. 2 with respect to the position where the traveling roller is first mounted on the apparatus-side holder. FIG. 8 shows the subsequent diagram of FIG.

  First, FIG. 1 shows a travelable object 1 in the form of a vacuum cleaner 2, in particular a household vacuum cleaner, which is designed as a manually operated handle device, and this is illustrated by FIG. 1. First of all, the vacuum cleaner 2 has a main body unit 3 provided with an electric motor for a suction fan. A dust collection chamber 4 provided for receiving sucked dust is incorporated in the main unit 3. The dust collection chamber 4 preferably includes a dust filter bag.

  The current supply of the suction fan incorporated in the main body unit 3 is performed via the electric cable 5.

  Furthermore, the main unit 3 has an extension in the shape of a goose neck, which extends over the area of the dust collection chamber 4. In the free end region, this extension forms an outlet for the handle 6 of the vacuum cleaner 2. An operating handle 7 is provided on the handle 6, and the operating handle 7 has an operating unit in the form of a slide switch that can be operated with a thumb, and a suction blower housed in the main unit 3 through the slide switch. The output of is adjustable.

  For cleaning the floor, the main unit 3 is fluidly and electrically coupled to a floor cleaning device 8 formed as an attachment.

  The floor cleaning device 8 has a housing 9 and a pipe connection nozzle 10. Covered by the housing 9, the suction passage starts from the pipe connection nozzle 10 and extends to the processing chamber formed as a suction chamber. The processing chamber is present in the area on the front side, which is on the opposite side of the pipe connection nozzle 10 and extends over almost the entire housing width.

  The chassis 11 of the floor cleaning device 8 covered by the housing has a chassis bottom 12. The chassis bottom 12 extends at an interval in the direction perpendicular to the floor 13 to be cleaned. In the region of the suction port provided, the chassis bottom 12 is interrupted correspondingly.

  Between the suction port of the floor cleaning device 8 and the front edge corner portion 14, two traveling rollers 15 are arranged to support the floor cleaning device 8 on the floor surface 13, and the roller axis x of the traveling roller 15 has a front axis It is directed parallel to the edge corner 14. The running roller 15 is received in a bowl-shaped ridge 16 on the chassis bottom 12 so as to be freely rotatable about its roller axis x.

  First, each traveling roller 15 has a central traveling surface portion 17 as viewed in the axial direction thereof, and the traveling surface portion 17 tapers conically with respect to the roller axis line x on both axial sides. The boss end portion 18 continues. The boss end portion 18 and the running surface portion 17 are integrally formed as an injection molded part with the same material. The travel roller 15 formed in this way has an axial length (width e) corresponding to approximately twice its diameter (height d), and is penetrated by the axial inner hole 19 so as to be axially inner. The hole 19 is open in the boss end portion 18 at both ends. A region surrounding the axial inner hole 19 that extends over the entire axial length of the traveling roller body 21 formed in this way forms a boss 20.

  A traveling roller body 21 formed by the traveling surface portion 17 and both boss end portions 18 is held by a traveling roller shaft 22, and the traveling roller shaft 22 is attached to an axial end of the traveling roller body 21. Is engaged in a holder 23 arranged on the chassis bottom 12. Correspondingly, these holders 23 have inner holes 24 and 25 oriented in a direction parallel to the floor for receiving a portion of the traveling roller shaft 22 protruding axially beyond the traveling roller body 21. is doing. Further, the holder 23 is made of hard plastic, and is further made, for example, by an injection molding method.

  The inner holes 24 and 25 present in the axial covering have different diameters, in which case the inner hole 24 is provided with a larger diameter than the inner hole 25 and the running roller body 21 or the chassis bottom side bulge. A screw head receiving portion 26 having a larger diameter is attached to the end of the inner hole opposite to the portion 16.

  The traveling roller shaft 22 is made of high-grade steel and has a smooth cooperating portion 27 that cooperates with the axial inner hole 19 or the boss 20 of the traveling roller body 21, and the cooperating portion 27 has protrusions on both sides. 28 and 29 follow.

  The cooperating portion 27 is at least approximately cylindrical in shape over its length, and in the illustrated embodiment, is formed to taper slightly conically from the protrusion 28 to the protrusion 29, In this case, the decrease in diameter over the length of the cooperating portion 27 corresponds to approximately 1/50 to 1/100 of the maximum diameter of the cooperating portion 27.

  Both protrusions 28 and 29 are provided with screw threads 30, 31 (outer screw threads). In this case, the protrusion 29 further forms an insertion part 32.

  Furthermore, as can be seen from FIG. 5 in particular, the thread 31 of the protrusion 29 on the plug side has a smaller outer diameter b than the thread 30 (outer diameter a) of the other protrusion 28. That is, the outer diameter b of the thread 31 is selected to be smaller than the root diameter of the other thread 30. In the illustrated embodiment, a thread 31 having an outer diameter b of 3 mm is provided on the plug-in side, and a thread 30 having an outer diameter a of 3.5 mm is provided in the opposite projection 28. The maximum diameter c of the cooperating portion 27 corresponds to the root diameter of the screw thread 30 having the larger diameter in the protruding portion 28.

  Furthermore, both threads 30 and 31 are formed as a single thread and right-hand thread in the same orientation, which is further formed with the same slope. That is, in the illustrated embodiment, the lead angle of threads 30 and 31 is about 10 °.

  Furthermore, both threads 30 and 31 are formed in a spiral as an automatic threading thread according to DIN 7998-4, for example.

  A screw head 33 is provided at the free end of the protruding portion 28 having the screw thread 30 on the side opposite to the cooperating portion 27. The screw head 33 has an axial tool opening 34 for inserting a hex key.

  In the process of first mounting the traveling roller 15 on the object 1 or the floor cleaning device 8, in order to mount the traveling roller 15, first, the traveling roller shaft 22 has its insertion portion 32 having a diameter larger than that. It is inserted into the inner hole 24 of the first holder 23 in the insertion direction, and then guided into the axial inner hole 19 on the traveling roller body side (see FIG. 7). When the insertion portion 32 provided with the screw thread 31 is engaged in the inner hole 25 of the holder 23 arranged behind the traveling roller body 21 in the insertion direction, at the same time, the protrusion on the screw head 33 side is projected. The thread 30 of the part 28 also enters the inner hole 24 of the attached holder 23, and then by the screwing action of the tool acting on the screw head 33, by means of the running roller shaft 22 or its threads 30, 31, i.e. Each thread 35 is formed in the holder 23 by automatic cutting of the threads 30 and 31 into the inner hole wall.

  By screwing and fixing the traveling roller shaft 22 at both end portions, the integral shape fixing by the frictional coupling of the traveling roller shaft 22 is achieved. This coupling can be released by a corresponding screw unwinding movement of the traveling roller shaft 22, after which the counter thread 35 cut into the inner holes 24 and 25 is used for other mounting of the traveling roller. The

  In an alternative embodiment, as shown in FIG. 6, an auger bit 36 may be provided at the free end of the protrusion 29 having the smaller diameter thread 31. Such a traveling roller shaft 22 may be used in particular in combination with an automatic mounting device. When the traveling roller 15 is first mounted on the object 1 in the automatic mounting device, first, the last in the insertion direction is the last. An inner hole 25 in the holder 23 is drilled, and then a thread 31 is provided with a counter thread 35.

  All the disclosed features (by themselves) form the essence of the present invention. Accordingly, the disclosure content of the attached / attached priority materials (copies of prior applications) is also intended to incorporate the features of these materials within the scope of the claims of this application. Is included.

DESCRIPTION OF SYMBOLS 1 Object 2 Vacuum cleaner 3 Main body unit 4 Dust collection chamber 5 Electric cable 6 Handle 7 Operation handle 8 Floor cleaning device 9 Housing 10 Pipe connection nozzle 11 Chassis 12 Chassis bottom 13 Floor 14 Front edge corner 15 Traveling roller 16 Raised part 17 Traveling surface portion 18 Boss end portion 19 Axial inner hole 20 Boss 21 Traveling roller body 22 Traveling roller shaft 23 Holder 24 Inner hole 25 Inner hole 26 Screw head receiving portion 27 Cooperating portion 28 Protruding portion 29 Protruding portion 30 Screw thread 31 Thread 32 Insert part 33 Screw head 34 Tool opening 35 Counter thread 36 Orbita a Outer diameter b Outer diameter c Outer diameter d Height e Width x Roller axis

Claims (8)

A travel roller (15) in a vacuum cleaner (2), for example, comprising a travel roller body (21) having a boss (20) and a single component travel roller shaft (22), The traveling roller shaft (22) has protrusions (28, 29) that pass through the boss (20) and protrude on both sides of the boss (20), and one of the protrusions (28, 29) is a difference. In the travel roller (15), which is a recess (32) and provided with a thread (31),
The other protrusion (28) is also threaded (30), and
The traveling roller characterized in that the traveling roller shaft (22) is smoothly formed in a cooperation portion (27) with the boss (20). An object (1) travelable by a travel roller (15), wherein the travel roller (15) has a boss (20) penetratingly engaged by a travel roller shaft (22); and A traveling roller having a traveling roller shaft (22) fixed in the holder (23) of the object (1) by protrusions (28, 29) projecting from the boss (20) on both sides of the boss (20). In the object (1) that can travel according to (15),
The traveling roller shaft (22) is screwed and fixed in the holder (23) on both sides, and in this case, thread portions (30, 31) formed on the traveling roller shaft (22) are the holder (23). An object capable of traveling by a traveling roller, wherein the object is engaged in a mating thread (35) formed inside.   3. Traveling roller or object according to claim 1 or 2, characterized in that the protrusions (28, 29), each provided with a thread (30, 31), have different diameters (a, b).   4. Traveling roller or object according to claim 1, characterized in that both threads (30, 31) have the same slope.   5. A travel roller or object according to claim 1, wherein the counter thread (35) is automatically formed during the screwing process of the travel roller shaft (22).   6. Traveling roller or object according to any one of the preceding claims, characterized in that the traveling roller (15) has a width (e) greater than a vertical height (d).   The travel roller or object according to any one of claims 1 to 6, wherein the boss (20) is formed so as to protrude beyond the travel surface portion (17) on both sides.   The traveling roller or the object according to any one of claims 1 to 7, wherein a screw head (33) is formed on one of the protrusions (28, 29).

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