DE102006015728B4 - Device for connecting and holding rollers - Google Patents

Abstract

Device for connecting and holding rollers, which can be mounted on a linear system and provided with connecting sections (30), holding sections (40) and spacer sections (60):
characterized,
- That the connecting portions (30) on both end surfaces (21) of the rows of rollers (20) are arranged;
- That the holding portions (40) are arranged in pairs perpendicular to the respectively associated connecting portions (30); and
In that the spacer sections (60) are attached to the upper and lower ends of two holding sections (40), the spacer sections (60) being arranged in pairs between the two rollers (20), and each of the spacer sections (60) comprising a pressing section (40) 61) linearly on the rolling surface (22) of the rollers (20) comes to rest, and wherein at the junction between the spacer portion (60) and the holding portion (40) has a recess (50) is formed, while the two spacer sections (60) and the two holding portions (40) define a rectangular and annular cavity.

Description

The The invention relates to a device for connecting and holding Rolls in the linear system.

• 1. Wie aus 1 ersichtlich, ist ein erster Rollenabstandshalter an beiden Endflächen der Rollen 10 mit einer je Haltekette 12 versehen. Abstandsstücke 11 der Haltekette 12 sind derart hergestellt, dass die Rollen 10 als Kern der Form angesehen sind. Zunächst werden die Rollen 10 in eine Vaterform und eine Mutterform eingesetzt, woraufhin die Oberfläche der Rollen 10 aus Kunststoff im Spritzgussverfahren hergestellt ist. Dieser Rollenabstandshalter, wie aus US 6,626,572 B2 bekannt, weist aber die folgenden Nachteile auf:
• 1.1 Bei den Abstandsstücken 11 der herkömmlichen Haltekette 12 sind die Rollen 10 als Formkern eingesetzt und dadurch zwischen den Rollen 10 ausgebildet. Das Herstellungsverfahren ist sehr kompliziert. Außerdem müssen die Abmessungen der Form je nach Baugröße variieren. Das heißt, dass desto mehr Rollen 10 eingesetzt werden müssen, je länger die Haltekette 12 ist. Hierdurch ergibt sich die Steigerung der Herstellungsdauer sowie der Herstellungsschwierigkeiten. Daher wird das Produkt mit größerem Kostenaufwand hergestellt.
• 1.2 Bei den Abstandsstücken 11 sind die Rollen 10 als Formkern eingesetzt und unmittelbar zwischen den Rollen 10 ausgebildet. Daher muss das Entformungsmittel auf den Bereich zwischen den Abstandsstücken 11 und den Rollen 10 aufgetragen werden, bevor die Abstandsstücke 11 ausgebildet sind. Hierdurch ergibt sich ein kompliziertes Herstellungsverfahren, was zur Erhöhung von Herstellungskosten führt.
• 1.3 Die Haltekette 12 umfasst die Abstandsstücke 11, in deren konkaven Flächen sich Rollen 10 befinden. Außerdem entspricht der Krümmungsradius der beiden konkaven Flächen dem Radius der Rollen 10. Hierdurch ergibt sich eine vollflächige Berührung zwischen den Abstandsstücken 11 und den Rollen 10, was zur erheblichen Erhöhung des Reibungswiderstands zwischen den Abstandsstücken 11 und den Rollen 10 führt.
• 2. Wie aus 2 ersichtlich, sind Rollen 10 bei einem zweiten Rollenabstandshalter ebenfalls als Formkern eingesetzt. Zwischen je zwei Rollen 10 sind Abstandsstücke 13 im Spritzgussverfahren ausgebildet. Jedes der Abstandsstücke 13 ist an einer den Rollen 10 entsprechenden Kontaktrollfläche mit im Spritzgussverfahren ausgebildeten, vorspringenden Verbindungsabschnitten 131 versehen. Diese Konstruktion ist aus US 6,390,678 B1 bekannt. Die Gestaltung gemäß 2 entspricht in technischer Hinsicht im Wesentlichen derjenigen gemäß 1, jedoch mit dem Unterschied, dass die vorspringenden Verbindungsabschnitte 131 an unterschiedlichen Stellen im Spritzgussverfahren ausgebildet sind. Daher weist der Rollenabstandshalter ebenfalls die folgenden Nachteile auf:
• 2.1 Bei den Abstandsstücken 13 der herkömmlichen vorspringenden Verbindungsabschnitte 131 sind die Rollen 10 als Formkern eingesetzt und dadurch zwischen den Rollen 10 ausgebildet. Das Herstellungsverfahren ist ebenfalls kompliziert. Außerdem müssen die Abmessungen der Form je nach Abmessungen der Kette variieren. Das heißt, dass desto größer die Maschine ist, je länger die Abmessungen sind. Hierdurch ergibt sich die Steigerung der Herstellungsschwierigkeiten. Daher wird das Produkt mit größerem Kostenaufwand hergestellt.
• 2.2 Bei den Abstandsstücken 13 sind die Rollen 10 als Formkern eingesetzt und unmittelbar zwischen den Rollen 10 ausgebildet. Daher muss das Entformungsmittel auf den Bereich zwischen den Abstandsstücken 11 und den Rollen 10 aufgetragen werden, bevor die Abstandsstücke 11 ausgebildet sind. Hierdurch ergibt sich ein kompliziertes Herstellungsverfahren, was zur Erhöhung von Herstellungskosten führt.
• 2.3 Die vorspringenden Verbindungsabschnitte 131 sind in der Mitte einer Seite der Kontaktrollfläche der Rolle 10 vorgesehen, wobei das Gleitstück an einer dem Rollenkontaktbereich entsprechenden Stelle im Inneren der Rollenrille mit einer Führungsrille versehen ist. Die schwierige Verarbeitung der Führungsrille führt jedoch zur Erhöhung von Herstellungskosten. Außerdem wird die rollende Leichtgängigkeit von den vorspringenden Verbindungsabschnitten 131 beeinträchtigt.
• 2.4 Bei dem zweiten Rollenabstandshalter wird jede Rolle 10 in zwei konkaven Flächen des Abstandsstücks 13 aufgenommen. So entspricht der Krümmungsradius der beiden konkaven Flächen dem Radius der Rollen 10. Hierdurch ergibt sich eine vollflächige Berührung zwischen den Abstandsstücken 13 und den Rollen 10, was zur erheblichen Erhöhung des Reibungswiderstands zwischen den Abstandsstücken 13 und den Rollen 10 führt.
• 2.5 Die Rollen 10 werden in radialer Richtung am meistens belastet. Die vorspringenden Verbindungsabschnitte 131 befinden sich in radialer Richtung der Rollen 10, was zur erheblichen Verringerung der Kontaktrollfläche zwischen den Rollen und der Gleitstückrille führt. Hierdurch werden das Belastungsvermögen sowie die Steifheit der Linearführung in großem Maße reduziert.
• 3. In 3 ist ein dritter Rollenabstandshalter dargestellt. Die Rollen 10 sind endseitig an ihren Kontaktseiten mit zwei parallel verlaufenden Verbindungsabschnitten 15 versehen, wobei mehrere Schräghalteabschnitte 14 schräg zur Innenseite der beiden Verbindungsabschnitte 15 angeordnet sind. An einem anderen Ende der paarweise angeordneten Schräghalteabschnitte 14 ist ein Abstandsstück 16 angebracht, das auf einer anderen Rollkontaktseite der Rolle 10 zur Auflage kommt. Diese Konfiguration ist aus US 2005/0152625 A1 bekannt, wobei sie die folgenden Nachteile aufweist:
• 3.1 Die beiden Verbindungsabschnitte 15 sind an den beiden Kontaktseiten der Rollen 10 angebracht. Außerdem fluchten die beiden Verbindungsabschnitte 15 und die Kontaktflächen der Rollen 10. Daher wird der Betrieb an beiden Kontaktbereichen der Rollen 10 von den Verbindungsabschnitten 15 beeinträchtigt. Hierdurch ergibt sich großer Rollwiderstand, wenn die Rollen 10 die Rollbewegung durchführen. In anderen Worten kommt eine Kontaktreibung leicht zustande.
• 3.2 Die Schräghalteabschnitte 14 verlaufen schräg nach oben. Daher kommt ein kürzeres Abstandsstück 16 mit dem Mittelbereich der Rolle 10 in Berührung. Durch die einseitige Stützkraft werden die Abstandsstücke 16 im Zusammenwirken mit den Schräghalteabschnitten 14 im Betrieb erschüttert, was zur ungleichmäßigen Kraftverteilung führen kann.

Conventional spacers of rollers in the linear guide can be divided into three types:

• 1. Like out 1 As can be seen, a first roller spacer is provided on both end surfaces of the rollers 10 with one per retaining chain 12 Mistake. spacers 11 the retaining chain 12 are made in such a way that the rollers 10 are considered as the core of the form. First, the roles 10 used in a father form and a mother form, whereupon the surface of the rolls 10 made of plastic by injection molding. This roll spacer, like out of US 6,626,572 B2 known, but has the following disadvantages:
• 1.1 For the spacers 11 the conventional retaining chain 12 are the roles 10 used as a mold core and thereby between the rollers 10 educated. The manufacturing process is very complicated. In addition, the dimensions of the mold must vary depending on the size. That is, the more roles 10 must be used, the longer the retaining chain 12 is. This results in the increase in production time and manufacturing difficulties. Therefore, the product is produced at a greater cost.
• 1.2 For the spacers 11 are the roles 10 used as a mold core and directly between the rollers 10 educated. Therefore, the mold release agent must be applied to the area between the spacers 11 and the roles 10 be applied before the spacers 11 are formed. This results in a complicated manufacturing process, which leads to an increase in manufacturing costs.
• 1.3 The retaining chain 12 includes the spacers 11 in which concave surfaces roll 10 are located. In addition, the radius of curvature of the two concave surfaces corresponds to the radius of the rollers 10 , This results in a full-surface contact between the spacers 11 and the roles 10 , which significantly increases the frictional resistance between the spacers 11 and the roles 10 leads.
• 2. How out 2 Obviously, roles are 10 in a second roll spacer also used as a mold core. Between every two roles 10 are spacers 13 formed by injection molding. Each of the spacers 13 is at one of the roles 10 corresponding Kontaktrollfläche formed by injection molding, projecting connecting portions 131 Mistake. This construction is out US 6,390,678 B1 known. The design according to 2 corresponds technically essentially to that according to 1 , but with the difference that the projecting connecting sections 131 are formed at different points in the injection molding process. Therefore, the roller spacer also has the following disadvantages:
• 2.1 At the spacers 13 the conventional projecting connecting portions 131 are the roles 10 used as a mold core and thereby between the rollers 10 educated. The manufacturing process is also complicated. In addition, the dimensions of the mold must vary depending on the dimensions of the chain. This means that the larger the machine, the longer the dimensions are. This results in the increase of manufacturing difficulties. Therefore, the product is produced at a greater cost.
• 2.2 For the spacers 13 are the roles 10 used as a mold core and directly between the rollers 10 educated. Therefore, the mold release agent must be applied to the area between the spacers 11 and the roles 10 be applied before the spacers 11 are formed. This results in a complicated manufacturing process, which leads to an increase in manufacturing costs.
• 2.3 The projecting connecting sections 131 are in the middle of one side of the contact surface of the roll 10 provided, wherein the slider is provided at a position corresponding to the roller contact area in the interior of the roller groove with a guide groove. The difficult processing of the guide groove, however, leads to an increase in manufacturing costs. In addition, the rolling smoothness of the projecting connecting portions 131 impaired.
• 2.4 The second roll spacer becomes each roll 10 in two concave surfaces of the spacer 13 added. Thus, the radius of curvature of the two concave surfaces corresponds to the radius of the rollers 10 , This results in a full-surface contact between the spacers 13 and the roles 10 , which significantly increases the frictional resistance between the spacers 13 and the roles 10 leads.
• 2.5 The roles 10 are mostly loaded in the radial direction. The projecting connecting sections 131 are in the radial direction of the rollers 10 , which leads to a considerable reduction of the contact rolling surface between the rollers and the slider groove. As a result, the load capacity and the rigidity of the linear guide are greatly reduced.
• 3. In 3 a third roller spacer is shown. The roles 10 are at their contact sides with two parallel connecting sections 15 provided, wherein a plurality of inclined sections 14 diagonally to the inner side te of the two connecting sections 15 are arranged. At another end of the paired inclined sections 14 is a spacer 16 mounted on another roller contact side of the roller 10 comes to the edition. This configuration is off US 2005/0152625 A1 known, wherein it has the following disadvantages:
• 3.1 The two connecting sections 15 are at the two contact sides of the rollers 10 appropriate. In addition, the two connecting sections are aligned 15 and the contact surfaces of the rollers 10 , Therefore, the operation will be at both contact areas of the rollers 10 from the connection sections 15 impaired. This results in great rolling resistance when the rollers 10 perform the rolling motion. In other words, a contact friction comes easily.
• 3.2 The inclined sections 14 run diagonally upwards. Therefore, comes a shorter distance piece 16 with the middle area of the roll 10 in touch. Due to the unilateral support force, the spacers 16 in cooperation with the inclined sections 14 Shaken during operation, which can lead to uneven force distribution.

From the US 4,208,078 A is known a cylindrical roller bearing. The roller bearing has inner and outer rings, cylindrical rollers, and a retainer receptacle with a pair of annular members distributed in close proximity to and along opposite ends of the cylindrical rollers in a circular arrangement within the annular space between the inner and outer rings. The annular members are provided with carrier projections which are respectively arranged in a radially outer position of the respective clearance between adjacent rollers. The carrier projections serve to hold the rollers in the bearing.

By The invention will provide a device for connecting and holding Roles created a simple and fast mass production allowed. According to the invention, spacer sections are in pairs arranged perpendicular to connecting portions. Besides, they are Recesses at joints between the spacer sections and holding sections formed. This results in a light Injection molding and demolding of the holding sections and the Connecting sections. About that In addition, the length corresponds the distance sections of those of the roles. So it is not necessary that the rollers serve as the core by injection molding. In this way the manufacturing costs are significantly reduced.

In addition, will by the invention a device for connecting and holding created by roles that provide a uniform and stable transmission causes. The spacers are in pairs between the two Rollers provided. Each of the spacer sections has a pressing section on, the line on the Kontaktrollfläche the rollers to support comes. The pressing sections the opposite Spacers are arranged according to the axis of the rollers and are not on the two sides of the rolling surface. So will be a smooth Movement of the linear guide guaranteed. With the pressing sections the upper and lower spacer sections will avoid that undesirable Effects due to misfortune, friction, shock and fluctuations occur when the rollers are rolling.

Further is a device for connecting and holding by the invention created by roles that allows the storage of lubricant. The two spacer sections and the two holding sections border a rectangular and annular Cavity off. This results in distances from the roles. hereby is enabled that the rolling surface the rollers non-contact is. Furthermore becomes practical oil storage ensured.

The Invention has in particular the features specified in claim 1 on. Advantageous embodiments of the invention are specified in the subclaims.

in the Following are objects, features and operation of the invention based on the preferred embodiments and the accompanying drawings explained in more detail. It demonstrate:

1 a schematic representation of a first configuration according to the prior art;

2 a perspective view of a second configuration according to the prior art;

3 a perspective view of a third configuration according to the prior art;

4 a perspective view of an embodiment of a device according to the invention;

5 a perspective view of an embodiment of a device according to the invention, in which a plurality of rollers are used;

6 a side view of the embodiment of a device according to the invention; and

7 a section through the injection mold according to the present invention.

Referring to 4 to 6 is the inventive device for connecting and holding roles 20 used, this device moves in a roller conveyor of a linear system. The inventive device for connecting and holding rollers comprises connecting sections 30 , Holding sections 40 and distance sections 60 ,

The connecting sections 30 are on both end surfaces 21 the roles 20 arranged. The two connecting sections 30 have essentially the same distance from two contact areas 221 the rolling surface 22 the roles 20 , In practice, the connecting sections become 30 in the area of contact areas 221 the rolling surface 22 the roles 20 held.

The holding sections 40 are in pairs perpendicular to the respective associated connection sections 30 arranged.

The distance sections 60 are at the upper and lower ends of two holding sections 40 appropriate. The distance sections 60 are in pairs between the two roles 20 arranged. Each of the distance sections 60 has a pressing portion 61 on top of the rolling surface 22 the roles 20 comes to the edition. The pressing sections 61 the opposite distance sections 60 are the axis of the rollers 20 arranged accordingly. In addition, there are the upper and lower spacer section 60 on the two sides of the contact areas 221 , At the junction between the spacer section 60 and the holding section 40 is a recess 50 educated. The two distance sections 60 and the two holding sections 40 delimiting a rectangular and annular cavity, the positioning of the rolling surface 22 the roles 20 and the oil storage allows.

With reference to 5 and 6 the operation of the present invention is illustrated.

The distance sections 60 are located at the top and bottom of the two holding sections 40 , wherein the above and below arranged spacer sections 60 in pairs between the two roles 20 are provided. In this way, a stable operation of the rollers 20 guaranteed.

In addition, each of the distance sections 60 on both sides with one pressing section each 61 provided that a line-like contact with the rolling surface 22 the roles 20 causes. In addition, the Andrückabschnitte 61 the opposite distance sections 60 the axis of the rollers 20 arranged accordingly. This results in a lesser, contact-type frictional resistance between the spacer section 60 and the rollers on both sides 20 ,

It should be noted that on both sides of the upper and lower contact areas 221 the roles 20 arranged distance sections 60 an effective stabilization of the movement of the rollers 20 cause. In this way, a smooth and stable movement of the device according to the invention for connecting and holding rollers is ensured. It also prevents the adjacent roles 20 clash. The rectangular and annular design allows for practical oil storage. Furthermore, a deformation of the two holding sections 40 and the top and bottom spacer sections 60 be excluded. This avoids that the fluctuation of the device according to the invention occurs during operation. Thus, the vibration, the resistance and the noise emission can be significantly reduced.

Out 7 it can be seen that at the junction between the spacer section 60 and the holding section 40 a recess 50 is formed, and that the connecting portions 30 , the holding sections 40 and the distance sections 60 have uniform configuration in horizontal and vertical directions. Using the recess 50 is a simple passage of a form A possible. The device according to the invention has hollow, stable rollers 20 on. Unlike the state of the art, where the roles 20 previously must be embedded to form the cavity, the device of the invention requires only a slider B on the form A.

Therefore, one can perform the injection molding process very easily, the mold is easy to produce. In addition, the configuration in the manufacture of no difficulties. In addition, the connecting sections 30 and the holding sections 40 Easy to produce by injection molding and easily demoulded. In addition, the length of the distance sections corresponds 60 those of the roles 20 where it is not necessary that the roles 20 serve as the core for the injection molding process. Thus, the device according to the invention may be integrally formed, with a rapid mass production is ensured.

It should also be noted that the connecting sections 30 at the two end surfaces 21 the roles 20 are arranged, wherein the two connecting portions 30 have essentially the same distance from two contact areas 221 the rolling surface 22 the roles 20 , In addition, the connecting sections can 30 between the two contact areas 221 the rolling surface 22 the roles 20 are located. In contrast to the prior art, at Therefore, the guide groove serving to receive the connecting portions is located in the recess of the rollers, it is not necessary that the rolling surface of the rollers is recessed. By contrast, the processing is carried out at a most easily processable roll edge location where the recess 50 located. In this way, the complicated processing of the mold according to the invention is unnecessary, whereby the production and processing can be considerably facilitated.

10

role

11

spacer

12

Chain

13

spacer

131

connecting portion

141

Angular holding section

15

connecting portion

16

spacer

20

role

21

end face

22

rolling surface

221

contact area

30

connecting portion

40

holding section

50

recess

60

Distance section

61

pressure application

A

shape

B

slide

Claims (4)

Device for connecting and holding rollers which can be mounted on a linear system and with connecting sections ( 30 ), Holding sections ( 40 ) as well as distance sections ( 60 ): characterized in that - the connecting sections ( 30 ) on both end surfaces ( 21 ) of the rows of rollers ( 20 ) are arranged; - that the holding sections ( 40 ) in pairs perpendicular to the respective associated connection sections ( 30 ) are arranged; and that the distance sections ( 60 ) at the upper and lower ends of two holding sections ( 40 ), the spacer sections ( 60 ) in pairs between the two roles ( 20 ) are arranged, and wherein each of the spacer sections ( 60 ) a pressing portion ( 61 ), which is linearly on the rolling surface ( 22 ) of the roles ( 20 ) is applied, and wherein at the junction between the spacer section ( 60 ) and the holding section ( 40 ) a recess ( 50 ), while the two spacer sections ( 60 ) and the two holding sections ( 40 ) define a rectangular and annular cavity. Device according to Claim 1, characterized in that the connecting sections ( 30 ) between the two contact areas ( 221 ) of the rolling surface ( 22 ) of the roles ( 20 ) are located. Apparatus according to claim 1 and 2, characterized in that the pressing portions ( 61 ) of the opposing distance sections ( 60 ) of the axis of the rollers ( 20 ) are arranged accordingly, wherein the upper and the lower spacer portion ( 60 ) on the two sides of the contact areas ( 221 ) are located. Device according to Claim 2, characterized in that the two connecting sections ( 30 ) the same distance from two contact areas ( 221 ) of the rolling surface ( 22 ) of the roles ( 20 ) to have.