Eccentric sleeve type limit adjusting structure and flat knitting machine head

Abstract

The utility model relates to the field of flat knitting machine head mechanical structures, in particular to an eccentric sleeve type limiting adjusting structure and a flat knitting machine head. A bearing pin in the eccentric sleeve type limiting adjusting structure is used for mounting a limiting bearing; the eccentric sleeve is provided with an eccentric inner hole and an outer cylindrical surface, and the bearing pin is fixed in the eccentric inner hole; a round hole is formed in the machine head aluminum box, the outer cylindrical surface of the eccentric sleeve is matched with the round hole, and the eccentric sleeve can rotate in the round hole; according to the structure, an eccentric inner hole of the eccentric sleeve is matched with a bearing pin, a gap between the bearing and a large bar is changed, tightness adjustment of the bearing and the large bar is achieved, the outer cylindrical face is matched with a round hole of a machine head aluminum box, it is guaranteed that the limiting bearing and the large bar are in surface contact all the time, and the limiting effect is good. Local abrasion caused by point contact is avoided, and in the subsequent bearing pin locking process, the gap between the bearing and the large lever cannot be affected.

Description

Technical Field

[0001] This utility model relates to the field of mechanical structure of flat knitting machine head, and in particular to an eccentric sleeve-type limit adjustment structure and flat knitting machine head. Background Technology

[0002] The knitting head of a computerized flat knitting machine is one of its core components, responsible for completing various knitting patterns. In traditional knitting head systems, the clearance adjustment between the limit bearing and the main thread typically employs a long slotted hole structure combining a bearing pin and a set screw. This structure adjusts the clearance by fitting the bearing pin into the long slot of the knitting head's aluminum housing and using the set screw to press the cylindrical surface of the pin against the slot, allowing it to slide within the slot. However, such solutions have the following significant drawbacks: (1) High dependence on machining accuracy: The machining accuracy of the screw hole of the set screw directly affects the perpendicularity of the bearing pin. If the perpendicularity of the screw hole is insufficient or the screw is offset, the bearing pin will tilt, causing the limit bearing and the main rod to form point contact instead of the designed line contact, which will aggravate local wear; (2) Poor gap stability: When the pin is locked after the gap is adjusted, the locking force is easy to cause the pin to move slightly, resulting in a secondary change in the gap, which cannot guarantee the consistency before and after adjustment; (3) Low operational reliability: Point contact causes abnormal wear between the main rod and the bearing in the high-frequency reciprocating motion of the machine head, shortening the life of the parts. At the same time, the increased gap causes the machine head to shake, resulting in defects such as twisted fabric coils and uneven density, which seriously affects the weaving quality and equipment efficiency.

[0003] While existing technologies include adjustment schemes using threads and eccentric sleeves, these methods are complex, lack sufficient adjustment precision, involve lengthy processing steps, and are costly to manufacture, making them unsuitable for the high stability and long lifespan requirements of industrial applications. For example, Chinese patent application number 200620101788.6 discloses a "Bearing Eccentricity Adjustment and Fixing Mechanism," which uses a set screw to tighten downwards, pressing against a tapered pin. The tapered pin expands the slot of the eccentric sleeve, tightening the sleeve and thus positioning and locking it. However, this eccentric sleeve structure is complex, involves long processing steps, and is costly to manufacture. Furthermore, this structure lacks anti-loosening protection; after the bearing has been under load for a period of time, the set screw loosens, the tapered pin shifts upwards, causing the eccentric sleeve to loosen, ultimately resulting in a change in the bearing's position.

[0004] Therefore, those skilled in the art urgently need a limit adjustment structure that can achieve precise line contact, stable adjustment, and easy maintenance. Utility Model Content

[0005] To address the shortcomings of the prior art mentioned in the background section, this utility model provides an eccentric sleeve type limiting adjustment structure, including a bearing pin, a limiting bearing, an eccentric sleeve, a machine head aluminum box, and a set screw; the bearing pin is used to install the limiting bearing; the eccentric sleeve has an eccentric inner hole and an outer cylindrical surface, and the bearing pin is fixed in the eccentric inner hole; the machine head aluminum box has a circular hole inside, and the outer cylindrical surface of the eccentric sleeve mates with the circular hole and can rotate within the circular hole; the set screw is used to lock the eccentric sleeve to fix the adjusted position.

[0006] Based on the above scheme, further, the axis of the eccentric inner hole is parallel to the axis of the outer cylindrical surface and offset by 0-1mm, forming an eccentricity.

[0007] Based on the above scheme, the bearing pin is further secured to the eccentric inner hole by a transition or interference fit through a threaded locking mechanism.

[0008] Based on the above solution, it further includes a lock nut, which cooperates with the set screw.

[0009] Furthermore, based on the above scheme, the limiting bearing is a rolling bearing or a sliding bearing.

[0010] Based on the above scheme, furthermore, the outer surface of the limiting bearing forms a line contact with the main shaft.

[0011] Based on the above solution, it further includes a fixing nut, wherein the bearing pin is fixed in the eccentric inner hole and passes through the round hole of the machine head aluminum box, and the fixing nut fixes the bearing pin to the machine head aluminum box.

[0012] Based on the above scheme, furthermore, the outer cylindrical surface of the eccentric sleeve and the circular hole are fitted with a transition or slight interference fit.

[0013] Based on the above scheme, the outer cylindrical surface of the eccentric sleeve is further provided with scale markings.

[0014] The present invention also provides a flat knitting machine head, which adopts the eccentric sleeve-type limit adjustment structure described above.

[0015] Compared with existing technologies, this utility model utilizes the eccentric inner hole of the eccentric sleeve to engage with the bearing pin. Because the eccentric sleeve has an eccentric adjustment function, it can change the gap between the bearing and the main rod on the bearing pin, thereby achieving adjustment of the tightness of the bearing and the main rod. Combined with the engagement of the outer cylindrical surface and the circular hole in the aluminum box of the machine head, it ensures that the limiting bearing and the main rod are always in surface contact, avoiding localized wear caused by point contact and extending the life of the components. Simultaneously, it effectively ensures that after the tightness gap between the bearing and the main rod is accurately adjusted, the gap between the bearing and the main rod will not be affected during the subsequent tightening of the bearing pin, guaranteeing that the tightness between them remains consistent before and after the bearing pin is tightened. Therefore, this structure reduces faults such as localized wear of the main rod or damage caused by uneven bearing force, effectively improving the stability and reliability of the knitting machine's operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the eccentric sleeve-type limiting adjustment structure provided by this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a side view of the eccentric sleeve-type limiting adjustment structure provided by this utility model.

[0020] Figure label:

[0021] Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] refer to Figure 1-3 This utility model provides an eccentric sleeve type limiting adjustment structure, including a bearing pin 1, a limiting bearing 2, an eccentric sleeve 3, a machine head aluminum box 4, and a set screw 5; the bearing pin 1 is used to install the limiting bearing 2; the eccentric sleeve 3 has an eccentric inner hole 3a and an outer cylindrical surface 3b, and the bearing pin 1 is fixed in the eccentric inner hole 3a; the machine head aluminum box 4 has a circular hole 4a inside, and the outer cylindrical surface 3b of the eccentric sleeve 3 cooperates with the circular hole 4a and can rotate within the circular hole 4a; the set screw 5 is used to lock the eccentric sleeve 3 to fix the adjusted position.

[0025] Specifically, such as Figure 1-3 As shown, after the bearing pin 1 is assembled with the limiting bearing 2, it is fixed in the eccentric sleeve 3. The eccentric sleeve 3 is assembled in the round hole 4a of the aluminum box 4 of the machine head. The eccentric sleeve 3 can rotate in the round hole 4a of the aluminum box to change the gap between the limiting bearing 2 and the main rod 7. After adjusting to the target gap, the eccentric sleeve 3 is locked by the set screw 5.

[0026] In one embodiment, the axis of the eccentric inner hole 3a is parallel to and offset by 0-1mm from the axis of the outer cylindrical surface 3b, forming an eccentricity.

[0027] In one embodiment, the bearing pin 1 is fixed to the eccentric inner hole 3a by a transition or interference fit through a threaded locking mechanism.

[0028] In one embodiment, such as Figure 2 As shown, it also includes a lock nut 6, which cooperates with the set screw 5.

[0029] The purpose of adopting the above technical solution is to fix the set screw 5 a second time by using the anti-loosening nut 6, so as to prevent the eccentric sleeve 3 from loosening under vibration.

[0030] In one embodiment, such as Figure 2 As shown, the limiting bearing 2 is a rolling bearing or a sliding bearing.

[0031] In one embodiment, the outer surface of the limiting bearing 2 forms line contact with the main bearing 7.

[0032] In one embodiment, such as Figure 2 As shown, it also includes a fixing nut 8, the bearing pin 1 is fixed in the eccentric inner hole 3a and passes through the round hole 4a of the machine head aluminum box 4, and the fixing nut 8 fixes the bearing pin 1 to the machine head aluminum box 4.

[0033] In one embodiment, the outer cylindrical surface 3b of the eccentric sleeve 3 and the circular hole 4a are fitted with a transition or slight interference fit.

[0034] The purpose of adopting the above technical solution is to ensure the accuracy of rotational adjustment.

[0035] In one embodiment, the outer cylindrical surface 3b of the eccentric sleeve 3 is provided with scale markings.

[0036] The purpose of adopting the above technical solution is to indicate the rotation angle and gap adjustment amount through scale markings.

[0037] The present invention also provides a flat knitting machine head, such as Figure 1 and Figure 3 As shown, the eccentric sleeve-type limit adjustment structure described above is adopted.

[0038] By adopting the above technical solution, the mating clearance between the machine head and the main shaft 7 is controlled by the eccentric sleeve-type limit adjustment structure, thereby reducing vibration and wear during operation.

[0039] In summary, this utility model utilizes the eccentric inner hole of the eccentric sleeve to engage with the bearing pin, and leverages the eccentric adjustment effect of the eccentric sleeve to change the clearance between the bearing and the main rod on the bearing pin, thereby achieving adjustment of the tightness of the bearing and the main rod. Combined with the engagement of the outer cylindrical surface and the circular hole in the aluminum box of the machine head, it ensures that the limiting bearing and the main rod are always in surface contact, avoiding localized wear caused by point contact and extending the life of the components. Simultaneously, it effectively ensures that after the tightness clearance between the bearing and the main rod is accurately adjusted, the subsequent tightening of the bearing pin will not affect the clearance between the bearing and the main rod, guaranteeing that the tightness between them remains consistent before and after the bearing pin is tightened. Therefore, this structure reduces faults such as localized wear of the main rod or damage caused by uneven bearing force, effectively improving the stability and reliability of the knitting machine's operation.

[0040] Although this document frequently uses terms such as bearing pin, limit bearing, eccentric sleeve, machine head aluminum box, and set screw, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An eccentric sleeve-type limiting adjustment structure, characterized in that: The assembly includes a bearing pin (1), a limiting bearing (2), an eccentric sleeve (3), a machine head aluminum box (4), and a set screw (5); the bearing pin (1) is used to install the limiting bearing (2); the eccentric sleeve (3) has an eccentric inner hole (3a) and an outer cylindrical surface (3b), and the bearing pin (1) is fixed in the eccentric inner hole (3a); the machine head aluminum box (4) has a circular hole (4a) inside, and the outer cylindrical surface (3b) of the eccentric sleeve (3) mates with the circular hole (4a) and can rotate within the circular hole (4a); the set screw (5) is used to lock the eccentric sleeve (3) to fix the adjusted position.

2. The eccentric sleeve-type limiting adjustment structure according to claim 1, characterized in that: The axis of the eccentric inner hole (3a) is parallel to the axis of the outer cylindrical surface (3b) and offset by 0-1mm, forming an eccentricity.

3. The eccentric sleeve-type limiting adjustment structure according to claim 1, characterized in that: The bearing pin (1) is fixed to the eccentric inner hole (3a) by transition or interference fit through thread locking.

4. The eccentric sleeve-type limiting adjustment structure according to claim 1, characterized in that: It also includes a lock nut (6), which engages with the set screw (5).

5. The eccentric sleeve-type limiting adjustment structure according to claim 1, characterized in that: The limiting bearing (2) is a rolling bearing or a sliding bearing.

6. The eccentric sleeve-type limiting adjustment structure according to claim 1, characterized in that: The outer surface of the limiting bearing (2) forms a line contact with the main block (7).

7. The eccentric sleeve-type limiting adjustment structure according to claim 1, characterized in that: It also includes a fixing nut (8), the bearing pin (1) is fixed in the eccentric inner hole (3a) and passes through the round hole (4a) of the machine head aluminum box (4), and the fixing nut (8) fixes the bearing pin (1) to the machine head aluminum box (4).

8. The eccentric sleeve-type limiting adjustment structure according to claim 1, characterized in that: The outer cylindrical surface (3b) of the eccentric sleeve (3) and the circular hole (4a) are fitted with a transition or slight interference fit.

9. The eccentric sleeve-type limiting adjustment structure according to claim 1, characterized in that: The outer cylindrical surface (3b) of the eccentric sleeve (3) is marked with scale marks.

10. A flat knitting machine head, characterized in that: The eccentric sleeve-type limit adjustment structure as described in any one of claims 1-9 is adopted.

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