Pulley block used for being installed in pulley mechanism of jacquard machine

Abstract

The utility model discloses a pulley block mounted in a pulley mechanism of a jacquard. Compact pulley block (1) for installation in a pulley mechanism of a jacquard machine and a corresponding method for manufacturing such a pulley block (1), the pulley block (1) comprising a shaft (3), a pulley (5) rotatably arranged about the shaft (3), and a housing (4) made at least partially of plastic, the housing (4) being fixed to the shaft (3), the housing (4) being at least partially contiguous with a side of the pulley (5), and the housing (4) comprises a metal fixing plate (10, 10 ', 10' ', 11, 11') which is fixed to the shaft (3) by an interference fit in order to fix the housing (4) to the shaft (3).

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of pulley set for being installed in the pulley mechanism of jacquard machine, comprising:

[0002] - shaft;

[0003] - pulley, the pulley is arranged to be able to rotate around the shaft;And

[0004] - housing, the housing is at least partially made of plastic, the housing is fixed to the shaft and at least partially with the pulley side surface meets.

[0005] The utility model further relates to a kind of pulley mechanism for jacquard machine, which includes the pulley set according to the utility model.

[0006] In addition, the utility model further relates to a jacquard machine, which includes the pulley mechanism according to the utility model. BACKGROUND

[0007] As described in WO 2014 / 076558 A2 for example, a jacquard machine is used to bring the warp threads in a weaving machine into the correct position at each weaving cycle in order to achieve the desired weaving structure with the desired pattern in combination with the weft threads.

[0008] The warp threads are brought into the desired position by means of a pulley mechanism. In this type of pulley mechanism, a first type of pulley set is provided with an upper pulley and a lower pulley. Examples of such pulley sets are known from CH 380 046 A, CN 203 229 633 U, EP 0 526 820 A1, CH 367 452 A and EP 3 247 828 B1, CN 217 579 225 U for example. A second type of pulley set in this type of pulley mechanism comprises only one pulley, which constitutes a counter roller. In addition, the pulley mechanism can also comprise a pulley set with more than 2 (for example 3) pulleys. The examples given in this patent application relate specifically to a pulley set with two pulleys, but can be applied mutatis mutandis to a single-wheel pulley set or to a pulley set with more than 2 wheels.

[0009] A pulley mechanism as described in WO 2014 / 076558 A2 is for example used in a jacquard machine for moving the warp yarns of a single-piece flat knitting machine. In this case, an upper pulley rope runs around an upper pulley. This rope is provided with two corresponding hooks (complementary set of hooks) which can be moved selectively one behind the other, for example in antiphase, wherein the movement of the corresponding hooks is converted into a rotation of the upper pulley via the upper pulley rope. By influencing the hooks by means of one or more associated selectors (for example electromagnetic selectors), the hooks are fixed in their uppermost position or lowermost position (depending on the design) for the duration of one or more weaving cycles. A lower pulley rope runs around a lower pulley, the lower pulley rope being connected at one end to one or more heddles which are provided with openings (heddles eyes) through which the warp yarns pass for adjusting the position of the warp yarns. Such heddles are spring-loaded, while the other end of the lower pulley rope remains in a well-defined position in the jacquard machine.

[0010] Similar pulley mechanisms are used in multi-sword looms which are set up to introduce more than one weft yarn per weaving cycle at different weft insertion levels. The associated pulley mechanisms can then comprise a plurality of pulley groups with 2 or more wheels and / or additional counter wheels.

[0011] In view of the growing trend of weaving higher density fabrics and / or providing more colors in the fabric, increasingly higher demands are placed on jacquard machines with regard to the number of pulley mechanisms that can be accommodated in the jacquard machine for the same volume. Therefore, all solutions for making the jacquard machine more compact are of particular importance. In order to be able to achieve this, the pulley groups are preferably designed to be as light as possible and as cheap as possible, while they must be able to withstand as much load per volume as possible.

[0012] In view of this objective, various pulley groups have been developed.

[0013] In a first known compact pulley group described in WO 2017 / 206,276 Al U, the pulley group is mainly made of metal to ensure sufficient strength and compactness.

[0014] In another known compact pulley group, a pulley is formed by molding a plastic wheel disc around a central upright flange of a metal shaft. This central upright flange provided on the metal shaft forms the core of the pulley in this way. Two side bodies forming a housing for the pulley group are provided with recesses in which the end portions of the shaft are rotatably fitted, so that the shaft with the pulley centrally fastened thereto is rotatably arranged relative to these side bodies. For this, however, the side bodies must be designed to be sufficiently rigid.

[0015] In a second, more compact known pulley block, metal shafts are clamped in recesses of the side bodies, wherein plastic pulleys are rotatably fitted around these shafts. By clamping, the side bodies are also axially fixed to the shafts in this way. At the end of these shafts, the side bodies cannot be displaced outward or inward in the pulley block, since the clamping to the shafts prevents this. Due to this axial fixation, these side bodies can themselves be designed less rigid, thus more compact and / or lighter and / or cheaper, or for the same compactness, the pulley block can have a longer working life.

[0016] In EP 3 247 828 B1, a compact pulley block is described, which has side bodies axially fixed in at least one cavity of a shaft. Such a pulley block is less easy to manufacture in practice. Utility model content

[0017] The object of the utility model is to solve at least some of the above-mentioned disadvantages and to provide an improved compact pulley block with a good working life.

[0018] The object of the utility model is achieved by providing a pulley block for mounting in a pulley mechanism of a jacquard machine, the pulley block comprising:

[0019] - a shaft;

[0020] - a pulley arranged to be rotatable around the shaft; and

[0021] - a housing partly made of plastic, which housing is fixed to the shaft and at least partly borders a side of the pulley, and which housing comprises a metal fixing plate, which metal fixing plate is fixed to the shaft via an interference fit in order to fix the housing to the shaft.

[0022] By having the housing partly made of plastic and applying such a metal fixing plate therein to fix the housing to the shaft via an interference fit, the overall width of the pulley block can be reduced without greatly reducing the width of the wheel bearing, which has a reliable shaft retention.

[0023] The metal material of the fixing plate has a negligible creep relative to the solution as presented in EP 3 247 828 B1. Therefore, there is almost no loss of retention due to time, temperature and / or environment.

[0024] The metal fixing plate also provides a metal thrust surface for wheel bearing guidance.

[0025] Such a pulley block can be produced at a lower cost while maintaining the reliability of the pulley block.

[0026] The fixing plate preferably comprises a hollow elongated cylindrical portion provided for the interference fit.

[0027] In order to at least partially make the housing from plastic, the housing preferably comprises a plastic part to which the fixing plate is fixed with at least one edge.

[0028] In a preferred embodiment, the fixing plate is clipped in a slot in the plastic part with at least one edge in order to fix the fixing plate to the plastic part. The fixing plate is preferably fitted along several sides in the plastic part, even more preferably along several opposite sides, and still more preferably the fixing plate is fixed in the plastic part over its entire circumference.

[0029] More particularly, the fixing plate can be fixed to the plastic part via overmolding. This allows a more inexpensive choice of material for said plastic part.

[0030] By making the housing partially from plastic, it can easily be made light in weight, with a relatively complex shape to combine the various functions of such a housing. The plastic part can more particularly have a guiding function in the pulley, for example for guiding a cord and / or for guiding a pulley and / or for guiding a track in a jacquard machine. The plastic part is then a guiding part of the pulley block.

[0031] In order to dissipate heat, the fixing plate preferably extends partially around the outer periphery of the pulley block. Since the fixing plate constitutes a metal path for the dissipation of heat to the outer surface of the pulley block, the pulley block has an improved bearing thermal performance. The pulley block thus has a longer bearing life, avoids melting of the housing plastic, and possible lubricant degradation is slower.

[0032] In order to simplify the manufacture of the pulley block according to the invention, the shaft is preferably a full shaft. The fixing plate is preferably provided with a central cavity, which can for example be provided in the form of a hole, into which the shaft can be pressed in order to make an interference fit. The central cavity can have a circular shape or a polygonal shape, for example an octagonal shape.

[0033] Alternatively, for example, a hollow shaft can be provided, to which a metal fixing plate can be similarly fixed from the outside, or which can be fixed to, for example, via an internal press fit.

[0034] Viewed in the longitudinal direction of the shaft, the pulley is supported on the shaft in a bearing region of the shaft. The interference fit is preferably located in an interference region of the shaft, outside of this bearing region of the shaft.

[0035] When viewed in the longitudinal direction of the shaft, the shaft has a length P of and the bearing region preferably has a length W of .

[0036] Furthermore, the diameter D of the shaft is preferably , even more preferably . The fixing plate preferably extends in a longitudinal direction of the shaft within a fixing region at an end of the shaft, which fixing region preferably has a length Y of 0.5 . The fixing region is preferably also entirely located outside the bearing region. The interference region is preferably entirely located within the fixing region.

[0037] In a specific embodiment, the fixing plate is a first fixing plate of a housing, which is fixed to a first end of the shaft, and the housing comprises a second fixing plate, which is fixed to a second end of the shaft opposite the first end via an interference fit, in order to fix the housing to the shaft.

[0038] The first fixing plate is then preferably part of a first side body of the housing, which borders the pulley side on a first side, and the second fixing plate is preferably part of a second side body of the housing, which borders the pulley side on a second side opposite the first side. The first side body and the second side body are then connected to each other by the shaft.

[0039] When, in such an embodiment, the pulley is a first pulley of a pulley block, and the pulley block comprises one or more additional pulleys, each arranged rotatable around a respective shaft of the pulley block, and each bordering the side body, the side body is preferably only interconnected by the shaft and one or more additional interconnects extending between the pulleys. In this way, a pulley block can be obtained which is greatly reduced in size.

[0040] The object of the utility model is also achieved by providing a pulley mechanism for a jacquard machine, which comprises the above-mentioned pulley block according to the utility model.

[0041] Furthermore, the object of the utility model is achieved by providing a jacquard machine comprising such a pulley mechanism.

[0042] This interference fit or press fit or friction fit is preferably mainly obtained by deformation (plastic and / or elastic) of the fixing plate. The deformation of the fixing plate preferably comprises an important component of elastic deformation, which contributes greatly to maintaining the friction. The shaft is preferably mainly kept undeformed by the interference fit. This makes it easier to ensure that the cylindrical outer surface of such a shaft remains precisely cylindrical for the bearing performance.

[0043] The fixing plate can for example be made of sheet metal, which is preferably made by stamping.

[0044] More specifically, a central cavity can be stamped therein, and the shaft can be pressed into this cavity to achieve the interference fit.

[0045] In a preferred embodiment, the fixation plate is deformed prior to the interference fit. Preferably, a hollow elongated cylindrical portion is thereby formed, providing for the interference fit to be achieved. More specifically, the fixation plate can be provided with said central cavity, which cavity can be provided with a bend having a raised edge, thereby forming a hollow elongated cylindrical portion, after which the shaft can be pressed into the hollow elongated cylindrical portion to achieve the interference fit. Instead of providing said central cavity by stamping, the fixation plate can alternatively be deformed, for example, to form a blind hole into which the shaft can be pressed in order to achieve the interference fit.

[0046] In order to deform the fixation plate, it can be deformed, for example, by metal forming and / or by deep drawing, etc.

[0047] In order to provide the housing, the housing is preferably formed by overmolding a plastic part to the fixation plate.

[0048] In a housing having a plurality of side bodies, each side body can be formed by overmolding a respective plastic part to at least one respective fixation plate. In addition to the one or more interconnections with one or more shafts and one or more respective fixation plates, such a plastic part of a side body can be provided with connection elements in order to interconnect the side bodies by additional interconnections.

[0049] The utility model will now be explained in more detail on the basis of the following detailed description of a preferred embodiment of a rapier bar according to the utility model. The purpose of this description is merely to give explanatory examples and to point out further advantages and features of the utility model, and should therefore not be interpreted as limiting the field of application of the utility model or the patent protection claimed in the claims. BRIEF DESCRIPTION OF DRAWINGS

[0050] In this detailed description, reference is made to the drawings by means of reference numerals, in which:

[0051] Figure 1 A pulley mechanism is shown schematically, which has a pulley block;

[0052] Figure 2 A particular embodiment of a pulley block according to the utility model is shown in an elevation view;

[0053] Figure 3 A pulley block of Figure 2 is shown in a perspective view;

[0054] Figure 4 A pulley block of Figure 2 is represented in cross-section according to line AA' in Figure 2 ;

[0055] Figure 5 A pulley block of Figure 2 is represented in cross-section according to line B-B' in Figure 2 ;

[0056] Figure 6 It shows Figure 2 Exploded perspective view of the pulley system;

[0057] Figure 7 Shown separately in perspective view Figure 2 The fixing plate of the pulley block;

[0058] Figure 8 Shown separately in perspective view Figure 2 An alternative embodiment of the fixing plate of the pulley block;

[0059] Figure 9 The previous views show alternative embodiments of the pulley system according to the present invention;

[0060] Figure 10 According to Figure 9 The cross section of line EE' in the diagram represents Figure 9 A pulley system;

[0061] Figure 11 According to Figure 9 The cross section of line FF' in the diagram represents Figure 9 A pulley system;

[0062] Figure 12 yes Figure 9 Exploded perspective view of the pulley system;

[0063] Figure 13 Shown separately in side view Figure 9 The fixing plate of the pulley block;

[0064] Figure 14 Shown separately in longitudinal section Figure 9 The fixing plate of the pulley block. Detailed Implementation

[0065] The jacquard machine according to this utility model includes at least two rows of hooks 34 and at least two cutters, each cutter moving up and down in opposite phase to a row of hooks 34, and driving or not driving the corresponding hooks 34.

[0066] exist Figure 1 The diagram shows two hooks 34, each hook 34 forming part of a corresponding row of hooks 34. These two hooks 34 form what is called a hook group.

[0067] like Figure 1As shown, the two hooks 34 are connected to the upper pulley rope 2, which has already passed over the upper pulley 5 of the pulley assembly 1. The lower pulley rope 2' passes over the lower pulley 5 of the pulley assembly 1. The first end of the lower pulley rope 2' is connected to one or more heddles 33, which are provided with openings (heddle eyes) through which warp yarns 32 pass for adjusting the position of the warp yarns 32. These heddles 33 are fitted with springs 35. At the second end, the lower pulley rope 2' is held at a clearly defined position 36 in the jacquard machine. This position 36 can be a fixed position or it can be adjustable, for example, by means of a control profile. By controlling the profile, the height of the heddle eyes of the jacquard heddles 33 can be adjusted without having to adjust the height of the entire jacquard machine.

[0068] By shifting the hook 34, the position of the pulley block 1 is changed via the upper pulley rope 2, and thus, the position of the heddle wire 33 is also changed via the lower pulley rope 2'. In this way, the warp yarn 32 assembled here enters the desired position so as to achieve the desired weave structure with the desired pattern together with the weft yarn 31.

[0069] Apart from Figure 1 In addition to the components depicted, the pulley mechanism may further include other components, such as a reverse roller, around which pulley ropes 2, 2' have been passed, and the reverse roller may also constitute a pulley, guide wire, etc. according to the present invention.

[0070] The pulley assembly 1 shown from this pulley mechanism includes the pulleys 5, each pulley 5 being rotatably mounted about an axis 3. In an alternative embodiment (not shown), there may be one or more pulleys 5, each pulley 5 similarly rotatably mounted around a corresponding axis 3.

[0071] Shaft 3 preferably has higher wear resistance than pulley 5.

[0072] For this purpose, shaft 3 can preferably be made of metal, and more preferably of bearing steel, such as carbon chromium steel, preferably hardened, more specifically, for example hardened to 60 HRC, and preferably has a fine surface finish. This can be advantageous as a material also used in, for example, hydraulic applications, precision instruments, control devices, etc., thus offering high availability and allowing for high-quality products at a limited cost. In the illustrated embodiment, shaft 3 is a full shaft 3, preferably using needle rollers as such a full shaft, i.e., a component designed for roller bearings, which is standardly available. In alternative embodiments not shown, a hollow shaft can also be used.

[0073] More specifically, stainless steel types from the AISI 300 series, such as AISI types 302, 304, 310, 316, etc., preferably in a state indicated by "fully hard", are suitable materials for this shaft 3. Preferably, this shaft 3 is manufactured by a drawing process.

[0074] To better retain the lubricant, the shaft 3 of the pulley block 1 according to this invention is preferably provided with a porous coating. This coating may be, for example, tungsten disulfide.

[0075] The pulleys 5 are preferably made of plastic. In this regard, they can be described in detail in known ways. Polyoxymethylene (POM) or nylon (PA6 or PA6.6) can be considered here, but for a more durable solution, polyetheretherketone (PEEK) can also be considered. It is preferable to add lubricating additives, such as graphite or Teflon (polytetrafluoroethylene-PTFE), to the plastic.

[0076] To better retain the lubricant, this pulley 5 can also be equipped with a labyrinth seal.

[0077] like Figure 3 , Figures 5 to 6 and Figures 11 to 12 As shown, this pulley 5 preferably has a slot 27 on its periphery to guide the pulley rope 2 that has passed around it.

[0078] The pulley block 1 according to this invention has a housing 4 partially made of plastic and includes one or more fixing plates 10, 10', 10”, 11, 11' for securing the housing 4 to one or more shafts 3. These fixing plates 10, 10', 10”, 11, 11' are fixed to the respective shafts 3 by an interference fit. The interference fit is primarily achieved through deformation (plastic and / or elastic) of the fixing plates 10, 10', 10”, 11, 11'. The deformation of the fixing plates 10, 10', 10”, 11, 11' preferably includes a significant component of elastic deformation, which greatly contributes to maintaining friction. In the illustrated embodiment, the interference fit is achieved through approximately 45% elastic deformation and approximately 55% plastic deformation. The shafts 3 preferably remain undeformed primarily through the interference fit. This makes it easier to ensure that the cylindrical outer surface of the shafts 3 maintains a precise cylindrical shape, thereby improving bearing performance. By means of friction clamping, not only is the housing 4 axially fixed by the shaft 3, but the shaft 3 is also radially fixed by the housing 4, so that the shaft 3 cannot rotate relative to the housing 4, which avoids wear.

[0079] The pulley assembly 1 shown includes side bodies 6, 6', 7, and 7', which are arranged on both sides of the pulley 5 and form a housing 4. In an alternative embodiment, only one side body may constitute the housing 4, and this side body is in contact with at least one or more sides of the pulley 5 on at least one side.

[0080] Each of the shown side bodies 6, 6', 7, 7' includes corresponding plastic components 8, 8', 9, 9', including at least one of the said fixing plates 10, 10', 10'", 11, 11'. In an alternative embodiment not shown, a single plastic component may include two such side bodies.

[0081] The metal mounting plates 10, 10', 10”, 11, and 11' can be made of austenitic stainless steel, which is inexpensive, readily available, has high elongation at break, and requires no additional corrosion protection. In this regard, AISI 300 series, such as INOX 301-304, can be used, preferably in a state indicated by “semi-hard”.

[0082] The metal fixing plates 10, 10', 10”, 11, and 11' can be made of metal sheets. If the metal fixing plates are made of metal sheets, the metal sheets preferably have a thickness of about 0.3 mm.

[0083] When the fixing plates 10, 10', 10”, 11, and 11' are made of sheet metal, they are preferably formed by stamping. The central cavity 16 can be stamped as a through hole as shown in the illustrated embodiment, or alternatively, a blind cavity can be formed therein, and the shaft 3 can be pressed into the cavity 16 to achieve an interference fit. Such a central cavity 16 can have a circular shape, as shown in the illustrated embodiment, or a polygonal shape, such as an octagon.

[0084] In the illustrated embodiment, the fixing plates 10, 10', 10”, 11, 11' are deformed before the interference fit, such that by bending the metal sheet, the protruding edge 16 is disposed in the cavity 16, thereby forming a hollow elongated cylindrical portion 23 for achieving the interference fit.

[0085] Viewed along the longitudinal direction L of shaft 3, pulley 5 is supported on shaft 3 within the support region W of shaft 3. In the illustrated embodiment, the interference fit is located in the interference region X of shaft 3, outside the support region W of shaft 3. In an alternative embodiment, for example, with a hollow shaft 3, the interference region X may at least partially overlap with the support region W.

[0086] When viewed in the longitudinal direction L of shaft 3, shaft 3 preferably has The length P, and the support area W preferably has The length W.

[0087] Furthermore, the diameter D of shaft 3 is preferably... Even better Viewed longitudinally from shaft 3, the fixing plates 10, 10', 10”, 11, and 11' preferably extend within a fixing region Y at the end of shaft 3, and this fixing region Y preferably has... The length Y. The fixed region Y is preferably also located entirely outside the support region. The interference region X is preferably located entirely inside the fixed region Y.

[0088] exist Figures 2-6 In the first illustrated embodiment, these dimensions are more specifically...

[0089] When the fixing plates 10, 10', 10”, 11, and 11' deform, before achieving the interference fit, as in the illustrated embodiment, the length of the interference region X is preferably... In an alternative embodiment where the fixing plate does not deform after stamping, the interference region X has a length resulting from the deformation of the fixing plate when the interference fit is achieved.

[0090] In an alternative embodiment (not shown) having only one side body, the length P of shaft 3 is... The length W of the support region W is preferably... The interference region X can have a relatively long length X of up to 10 mm.

[0091] In an optional embodiment (not shown) of the pulley with a hollow shaft, a metal fixing plate with protrusions can be provided for securing the metal fixing plate to the hollow shaft via an internal press fit. In such an embodiment, the entire length of the shaft can be used to secure the fixing plate to the shaft, such that the fixing area Y can reach 20 mm. Preferably, the length Y of this fixing area Y is still limited to a maximum of 10 mm.

[0092] exist Figures 2-8 In the first embodiment shown, each end of each shaft 3 is provided with a separate fixing plate 10, 10”, 11. All fixing plates 10, 10”, 11 are identical, but in alternative embodiments they may be offset from each other. Figures 9-14 In the second embodiment shown, the first fixing plate 10' is disposed on one side of the two shafts 3, and the second fixing plate 11' is disposed on the other side of the two shafts 3. These fixing plates 10' and 11' are identical, but in alternative embodiments they may be offset from each other.

[0093] Preferably, each plastic component 8, 8', 9, 9' is overmolded onto one or more corresponding fixing plates 10, 10', 10'', 11, 11'. This allows for the selection of cheaper materials. Polyamide 6.6, whether or not combined with glass fiber (e.g., 30% glass fiber), is a suitable material for, for example, one or more plastic components 8, 8', 9, 9' of such a housing (4), but other materials, such as polyamide 6 and polyoxymethylene (POM), are also qualified as base plastics.

[0094] In order to rigidly fix the metal fixing plates 10, 10', 10”, 11, 11' to the plastic parts 8, 8', 9, 9' during overmolding, the metal fixing plates 10, 10', 10”, 11, 11' are provided with irregular portions 19, 20, 22 in their outer circumference 17. In such cases... Figure 7 In the illustrated embodiment, the fixing plate 10 is primarily circular in shape, but is provided with a flat edge 19 to prevent the fixing plate 10 from moving within the overmolded plastic component 8. In such... Figure 8 In the embodiment shown, the notch 20 is provided in the outer circumference 17. In such... Figure 13 In the embodiment shown, the fixing plate 10' is also provided with a notch 22 and an irregularly shaped hole 21, thereby preventing the fixing plate 10' from moving in the overmolded plastic part 8'.

[0095] In the first illustrated embodiment, such as Figures 2 to 8 As shown, through overmolding, the metal fixing plates 10, 10”, 11 are captured within the corresponding plastic parts 8, 9 along their entire outer periphery 17. In the second embodiment shown, as Figures 9 to 14 As shown, during the overmolding process, the metal fixing plates 10' and 11' are engaged with the grooves in the plastic parts 8' and 9' at their edges on two opposite sides.

[0096] In the illustrated embodiment, after the plastic component is overmolded, the fixing plates 10, 10', 10”, 11, 11' extend partially around the outer periphery of the pulley assembly 1 for heat dissipation.

[0097] In the illustrated embodiment, the side bodies 6, 6', 7, 7' are interconnected by shaft 3, which is achieved through corresponding fixing plates 10, 10', 10'", 11, 11' of the side bodies 6, 6', 7, 7'. In an embodiment with only one pulley 5, these side bodies 6, 6', 7, 7' are interconnected only with the corresponding shaft 3. One or more additional interconnections may be provided, preferably extending only on one side of the pulley 5. In embodiments with multiple pulleys 5, one or more additional interconnections may be provided in addition to interconnection with shaft 3. In the illustrated embodiment, such additional interconnections... The interconnect 12 is located between the pulleys 5. Thus, the housing 4 extends laterally only beside and between the pulleys 5, but not beyond them, resulting in a particularly compact pulley assembly 1. In the illustrated embodiment, the plastic parts 8, 8', 9, 9' are provided with corresponding pins 13 and holes 14 for implementing additional interconnects 12. This additional interconnection 12 is achieved by deforming the pins 13 after they are inserted into the holes 14, for example by ultrasonic welding, to form a thickened head 15. In alternative embodiments, the additional interconnection can be obtained, for example, by using press-fit and / or snap-fit ​​connections and / or adhesives.

[0098] like Figures 2-3 , Figure 6 , Figure 9 and Figure 12 As shown, the housing 4 may be provided with wings 29, which extend between multiple pulleys 5, or in the case of a single pulley, approximately 50% of the pulley's circumference is covered by the wings, in order to better guide the rope 2 around the pulley 5.

[0099] At least one side body 6, 6', 7, 7' of the pulley block 1 according to this utility model preferably includes a groove 28, such as Figure 3 As shown in a specific embodiment, the pulley ropes 2, 2' are used to secure the pulley ropes that pass over the pulley 5. The groove 28 preferably extends transversely to the longitudinal direction L of the corresponding axis 3 along the entire side body 6, 6', 7, 7', and preferably extends from one side of the side body 6, 6', 7, 7' to its opposite side. The groove preferably has the same curved shape as the pulley ropes 2, 2' that pass over the pulley 5.

Claims

1. A pulley block (1) for installation in the pulley mechanism of a jacquard machine, comprising: -Axis (3); - Pulley (5), said pulley (5) is arranged to be rotatable about said axis (3); and - Housing (4), the housing (4) being fixed to the shaft (3) and at least partially in contact with the side of the pulley (5); The housing (4) is characterized in that it is partially made of plastic and includes metal fixing plates (10, 10', 10”, 11, 11’) which are fixed to the shaft (3) by an interference fit so as to fix the housing (4) to the shaft (3).

2. The pulley system (1) according to claim 1, characterized in that, The housing (4) includes separate metal retaining plates (10, 10', 10”, 11, 11') at each end of the shaft (3).

3. The pulley system (1) according to any one of claims 1-2, characterized in that, The fixing plates (10, 10', 10”, 11, 11’) include a hollow, elongated cylindrical portion (23) for interference fit.

4. The pulley block (1) according to any one of claims 1-2, characterized in that, The housing (4) includes plastic components (8, 8', 9, 9'), and the fixing plates (10, 10', 10”, 11, 11') are fixed to the plastic components by at least one edge.

5. The pulley system (1) according to claim 4, characterized in that, The fixing plates (10, 10', 10”, 11, 11') are engaged in slots in the plastic components (8, 8', 9, 9') with at least one edge in order to secure the fixing plates (10, 10', 10”, 11, 11') to the plastic components (8, 8', 9, 9').

6. The pulley system (1) according to claim 5, characterized in that, The fixing plates (10, 10”, 11) are held in the plastic parts (8, 9) with their entire circumference (17) in order to fix the fixing plates (10, 10”, 11) to the plastic parts (8, 9).

7. The pulley system (1) according to claim 4, characterized in that, The plastic components (8, 8', 9, 9') are the guide components of the pulley assembly (1).

8. The pulley system (1) according to any one of claims 1-2, characterized in that, The fixing plates (10, 10', 10”, 11, 11’) extend partially around the outer periphery of the pulley assembly (1) for heat dissipation.

9. The pulley system (1) according to any one of claims 1-2, characterized in that, Viewed in the longitudinal direction (L) of the shaft (3), the pulley (5) is supported on the shaft (3) in the support area (W) of the shaft, and the interference fit is located in the interference area (X) of the shaft (3) outside the support area (W) of the shaft (3).

10. The pulley system (1) according to any one of claims 1-2, characterized in that, The fixing plates (10, 10', 10”, 11, 11') are the first fixing plates of the housing (4), the first fixing plates are fixed to the first end of the shaft (3), and the housing (4) includes a second fixing plate, the second fixing plate is fixed to the second end of the shaft (3) opposite to the first end by an interference fit, so as to fix the housing (4) to the shaft (3).

11. The pulley system (1) according to claim 10, characterized in that, The first fixing plate is part of the first side body (6) of the housing (4), the first side body (6) is connected to the side of the pulley (5) on the first side, the second fixing plate is part of the second side body (7) of the housing (4), the second side body (7) is connected to the side of the pulley (5) on the second side opposite to the first side, and the first side body (6) and the second side body (7) are connected to each other through the shaft (3).

12. The pulley system (1) according to claim 11, characterized in that, The pulley (5) is the first pulley of the pulley group (1), which includes one or more additional pulleys (5), each additional pulley (5) being arranged to rotate about a corresponding axis (3) of the pulley group (1), and each additional pulley being side-connected to the side body (6, 7), and the side body (6, 7) being interconnected only by the axis (3) and one or more additional interconnecting elements (12) extending between the pulleys (5).

13. The pulley mechanism of a jacquard machine, characterized in that, The pulley mechanism includes a pulley block (1) for installation in a jacquard machine as described in claim 1.

14. A jacquard machine, characterized in that, The jacquard machine includes the pulley mechanism according to claim 13.

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