CN113174693A

CN113174693A - Ball pin assembly

Info

Publication number: CN113174693A
Application number: CN202110088652.5A
Authority: CN
Inventors: J·科克
Original assignee: Carlmeyerstol R & D Co ltd
Current assignee: Carlmeyerstol R & D Co ltd
Priority date: 2020-01-24
Filing date: 2021-01-22
Publication date: 2021-07-27
Anticipated expiration: 2041-01-22
Also published as: EP3741893B1; CN113174693B; EP3741893A1

Abstract

The invention relates to a ball stud assembly, in particular in a pattern assembly of a warp knitting machine, having a first end (2) having at least one spherical portion, a second end (3) and a section (4) between the first end (2) and the second end (3), wherein at least one portion of the ball stud has a cavity (9) which is fluidically connected to an outer surface (7) by at least one channel (5). It is desirable to reduce the adjustment cost of the warp knitting machine and the maintenance cost of the ball stud (1). For this purpose, an element (8) made of a thermally conductive material surrounds the section (4).

Description

Ball pin assembly

Technical Field

The invention relates to a ball stud (Kugelbolzen) in a pattern assembly (Musternordnung), in particular in a warp knitting machine (Kettenwirkmaschen), having a first end having at least one part with a spherical shape, a second end and a section between the first end and the second end, wherein at least one part of the ball stud has a cavity which is fluidically connected to an outer circumferential surface by at least one channel.

Background

The invention is used in the context of warp knitting machines between a guide bar (legebare) and a pattern assembly. In this case, conventional ball pins have an oil tempering system in which oil flows through the ball pin. These systems are maintenance intensive because the oil absorbs the dust or other dirt and transports it on through the pipeline. In particular in dust-intensive environments, such as textile processing, oil tempering systems are very susceptible to dirt due to the high dust content. These contaminants mostly remain in particularly inaccessible locations and block the lines after a certain time. In the field of maintenance, dirt must be removed. This is not only time-consuming, but also associated with a large cleaning effort.

Disclosure of Invention

The aim of the invention is to reduce the adjustment cost (Einstellaufwalk nd) of a warp knitting machine and the maintenance cost of a ball stud.

This object is achieved in that the section is surrounded by an element made of a thermally conductive material.

The surface of the ball stud is enlarged by this element. A larger surface may dissipate more heat into the surrounding environment than a smaller surface. Thereby achieving a uniform temperature of the ball stud. The uniform temperature makes it possible to maintain tolerances relatively precisely. The damage or abrasion of the pin is avoided by precisely maintaining the tolerance, thereby improving the process reliability of the weaving.

Preferably the channels are arranged in a radial direction. The production of radially arranged channels is associated with less effort. Furthermore, the ball stud is usually designed as a rotationally symmetrical component, so that the cavity is usually designed as a bore, the axis of the bore coinciding with the axis of the ball stud. The radially arranged channels thus ensure a connection between the cavity and the outer circumferential surface.

Preferably the respective two channels are arranged diametrically opposite. This arrangement enables two channels, a channel pair, to be manufactured with holes, which makes the ball stud economical to manufacture.

Preferably the axes of the channels are parallel to each other. This enables the ball stud and channel to be manufactured with a small number of transposing processes (umpannungsvorgang). The exchange of the ball stud requires time and thus causes costs. These costs can be saved by parallel channels.

Preferably the section has one or more fluid guide elements between the outer peripheral surface and the element. The fluid guide member enables fluid flowing through the cavity and the channel to impact the member in a targeted manner. Thereby preventing clogging of the fluid and ensuring heat dissipation from the ball stud. Furthermore, a distance is produced between the channel and the element by the fluid guide element, which in turn facilitates the distribution of the fluid. This distribution enables greater heat dissipation, which keeps the temperature uniform.

Preferably, the flow guide element is configured in a ring shape. The annular fluid guiding element can be manufactured by means of a lathe, which substantially results in lower costs. Furthermore, the element is divided by an annular flow guide element into sections which can be adapted further if necessary.

Preferably the fluid guide elements are arranged between adjacent channels. The fluid guide element thus does not interfere with the channel and therefore does not interfere with the function of the channel. In addition, a heat transfer is thereby established between the ball stud and the component. The flow guide element assigns to each channel or to each channel pair a section that can be adapted as required.

Preferably the element has a fluid permeable structure. The fluid can thus flow from the cavity through the channels and the elements. During contact of the fluid with the surfaces of the ball stud and the component, the fluid absorbs heat and transports it outward. The fluid permeable structure increases the surface contacted by the fluid and thus the surface through which the fluid can absorb heat. Thereby improving heat dissipation from the ball stud.

Preferably the element is at least partially porous. The porous element has a large surface area compared to its volume. The large surface area to volume ratio results in a large surface for the transfer of heat to the fluid, and the element does not have to be constructed voluminous given the installation space. The fluid may absorb more heat and carry it accordingly.

Preferably the element is configured as a sintered element. The element can be produced in a precisely adapted manner by means of a sintering method. Furthermore, the sintering method can be used to specifically produce the porosity, so that the elements can have different porosities. The porosity can be adapted to the flow direction in order to ensure optimum heat dissipation.

Preferably, the element is connected to the segment in a form-fitting manner. The heat transfer from the ball stud into the component is ensured by a form fit. Furthermore, no additional fastening means are required for assembly or disassembly. This reduces maintenance costs while improving heat exchange between the element and the ball stud. A thermally conductive paste may be used for improved heat transfer.

Preferably the ball stud has a flow path through the cavity, the passage and the member. Fluid is conveyed from the cavity through the ball stud from the inside out through the channel and through the element. This causes a pressure drop to occur outwardly from the cavity. Dirt, dust, dirt, etc. are thereby prevented from reaching the ball stud. Whereby maintenance becomes simple.

A filter assembly is preferably disposed in the flow path. The filter assembly prevents dirt, dust, dirt, etc. from intruding into the ball stud and clogging the element. The filter may be mounted in a fluid supply (fluidzufuehung) to the ball stud at a location that is conveniently accessible or directly in the cavity of the ball stud. Possible contamination of the filter can be checked in scheduled routine maintenance and the necessary steps can be carried out if necessary. Thereby preventing jamming of the component and the ball stud being maintained in an optimum temperature window.

Preferably the ball stud has a fluid interface for connection to a fluid source. The ball stud is in fluid connection with a fluid source through a fluid interface. Thereby forcing fluid to flow through the ball stud. A uniform temperature of the ball stud is ensured by forced flow.

Preferably the fluid delivered by the fluid source is air. This allows the ball stud to be flowed through by a low-pressure generator, for example a machine fan (masterchinenluefter). Alternatively to this, a ball stud may be coupled to the compressed air interface. No additional peripheral devices are required. Whereby the acquisition costs remain low.

Drawings

The invention is described below with reference to the accompanying drawings according to preferred embodiments. Wherein:

FIG. 1 shows a ball stud and components;

FIG. 2 shows an assembled view of the ball stud and components;

fig. 3 shows a cross-section of the ball stud and the component.

Detailed Description

Fig. 1 shows a ball stud 1 with a first end 2, a second end 3 and a section 4 between the first end 2 and the second end 3. The section 4 has a channel 5 and a flow guiding element 6. The fluid element 6 is arranged on the outer circumferential surface 7. Further elements 8 are shown. The first end 2 is connected to a suitable counterpart, not shown. The second end 3 has fastening possibilities, such as threads or the like, for fitting the ball stud 1.

Fig. 2 shows the ball stud 1, to which the component 8 is fitted.

Fig. 3 shows a cross section of the ball stud 1. The ball stud 1 has a cavity 9, which is connected to the outer circumferential surface 7 by a channel 5. For this purpose, the channel 5 is arranged radially starting from the cavity 9. In the present embodiment, the two passages 5 are arranged diametrically opposite one another. Furthermore, a plurality of diametrically oppositely arranged channels 5 are parallel to each other. On the outer circumferential surface 7, a flow guiding element 6 is arranged. The flow guide elements 6 are arranged between the two channels 5 and at the edge of the section 4. The element 8 is in turn arranged on the fluid guide element 6. In this embodiment, the fluid guide element 6 is designed in a ring shape, as is the case with the element 7. The section 4, the flow guiding element 6 and the element 7 are geometrically related. By means of this geometric relationship, a form fit can be established between the fluid guide element 6 and the element 8. Furthermore, a filter 10 is arranged at the second end 3. The arrows shown indicate the flow path of the fluid.

The element 8 may be manufactured by a sintering process. The sintering process may achieve a fluid-permeable structure of the element 8. Furthermore, porous components can also be produced by sintering processes. The element 8 may have a fluid-permeable structure or a porous structure with restricted positions. The sintering process may achieve such a structure.

A fluid, not shown, is conveyed through the cavity 9 in the direction of the arrows. In the present embodiment, the fluid enters the cavity 9 at the second end 3 of the ball stud 1. The fluid flows from the cavity 9 through the channel 5 in the direction of the outer circumferential surface 7, in order to flow there through the element 8, finally guided by the fluid guide element 6. During contact of the fluid with the ball stud 1 or the component 8, the fluid absorbs heat from the ball stud 1 and transports it outward. The surface available for heat dissipation is increased by a multiple by the element 8, which is beneficial for heat transfer from the ball stud 1 to the fluid. The temperature of the ball stud 1 can be adjusted according to the amount of fluid flowing therethrough. For adjustment, a valve can be provided. The filter 10 filters contaminants from the fluid. Dirt cannot block the element 8, which lengthens the maintenance interval.

When the ball stud 1 is used in a factory (Fabrikhalle), air can flow through the ball stud 1 by means of the machine fans present. Alternatively to this, the ball stud 1 can be coupled to an existing compressed air system. No additional peripheral equipment is therefore required apart from the connection from the ball stud 1 to the existing compressed air system. The ball stud 1 can replace the ball studs used hitherto and is ready for use with a few operations.

The temperature control of the ball stud 1 therefore removes excess heat and thus the ball stud 1 remains within defined tolerance ranges and temperature ranges. The friction temperature is kept correspondingly low, so that damage and wear of the friction partners are avoided. Thereby extending the maintenance interval. Furthermore, machines using such ball studs 1 can be adjusted more precisely, which in turn reduces wear on other components.

Claims

1. Ball stud (1), in particular in a pattern assembly of a warp knitting machine, with a first end (2) having at least one portion of a spherical shape, a second end (3) and a segment (4) between the first end (2) and the second end (3), wherein at least one portion of the ball stud (1) has a cavity (9) which is fluidically connected to an outer surface (7) by at least one channel (5), characterized in that an element (8) made of a thermally conductive material surrounds the segment (4).

2. A ball stud (1) according to claim 1, characterised in that the channel (5) is arranged in a radial direction.

3. A ball stud (1) according to claims 1 and 2, characterised in that the respective two channels (5) are arranged diametrically opposite.

4. A ball stud (1) according to claims 1 to 3, characterised in that the axes of the channels (5) are parallel to each other.

5. A ball stud (1) according to claims 1 to 4, characterised in that the segment (4) has one or more fluid guide elements (6) between an outer peripheral surface (7) and the element (8).

6. A ball stud (1) according to claim 5, characterized in that the fluid guide element (6) is configured in the shape of a ring.

7. A ball stud (1) according to claims 5 and 6, characterized in that a fluid guiding element (6) is arranged between adjacent channels (5).

8. A ball stud (1) as claimed in claims 1 to 7, characterized in that said element has a fluid-permeable structure.

9. A ball stud (1) according to claims 1 to 8, characterized in that said element is at least partially porous.

10. A ball stud (1) according to claims 1 to 9, characterized in that said element (8) is configured as a sintered element.

11. A ball stud (1) according to claims 1 to 10, characterized in that said element (8) is connected with a form fit with said segment (4).

12. A ball stud (1) according to claims 1-11, characterized in that the ball stud (1) has a flow path through the cavity (9), the channel (5) and the element (8).

13. A ball stud (1) according to claims 1-12, wherein a filter assembly (10) is arranged in the flow path.

14. A ball stud (1) as claimed in claims 1 to 13, characterized in that the ball stud (1) has a fluid interface for connection with a fluid source.

15. A ball stud (1) as claimed in claim 14, wherein the fluid delivered by the fluid source is air.