A transmission device for driving a swing shaft of a jacquard machine

Abstract

The present invention discloses a transmission device for driving a swing shaft of a jacquard machine, comprising an eccentric vertical shaft, a conversion mechanism, and mutually opposite swing shafts. The conversion mechanism comprises a single connecting rod swing arm, a single swing arm shaft fixed to the connecting rod swing arm, a single eccentric fixed to the eccentric vertical shaft, and a single eccentric connecting rod hinged between the eccentric and the connecting rod swing arm. The swing arm shaft is parallel to the eccentric vertical shaft. One end of the connecting rod swing arm is hinged to a fixed crank rigidly connected to the end of one swing shaft via a single drivable rod. The opposite end of the connecting rod swing arm is hinged to a transfer crank movably mounted on the opposite end of one swing shaft via a drivable transfer rod. The transfer crank is hinged to a fixed crank rigidly connected to the opposite end of another swing shaft via a relay rod. After the eccentric vertical shaft replaces the existing commutator and main shaft, there is no reversing transmission loss. The conversion mechanism is simple and highly precise, and the single connecting rod swing arm can accurately reciprocate in its reverse limit.

Description

Technical field

[0001] The invention relates to a transmission device for driving a swing shaft of a jacquard machine, belonging to the technical field of jacquard machinery. [Background Technology]

[0002] Patent No. ZL201721556428.X discloses a jacquard gearbox with an improved structure. The upper (umbrella) gearbox 5 is located in the jacquard, and the lower (umbrella) gearbox is arranged in the loom. The output shaft 3 of the lower gearbox of the loom is connected to the power input shaft 51 of the upper gearbox 5 of the jacquard through the lower coupling 61, the transmission shaft 62 (universal vertical shaft) and the upper coupling 62 in sequence. Since the internal structure of the jacquard upper gearbox 5 is basically the same as that of the loom lower gearbox, the power input shaft 51 and the power output shaft 52 of the jacquard upper gearbox 5 are also meshed and reversed by a pair of bevel gears. Therefore, the jacquard upper gearbox 5 has the problem of reversing power loss. The jacquard upper gearbox not only has a high configuration cost, but also has a high ambient temperature due to high-position installation and an increased operating temperature of the jacquard upper gearbox (directly reflected in the hot housing). As a result, there are many vulnerable parts. For example, the bevel gears are prone to early wear and even breakage due to the alternating load of the jacquard opening. It is not enough to list them one by one, such as the bevel gears, the support bearings for the power input shaft 51, especially the sealing rings, and the support bearings for the power output shaft 52, especially the sealing rings. It can be seen that the maintenance and replacement workload is large and the operating and maintenance costs are high. In addition, the bevel gear meshing reversing has the disadvantages of low transmission efficiency and high working noise.

[0003] Application No. 202310285979.0 discloses a transmission knife-lifting mechanism for a textile machine, which is equipped with a commutator 1, which is an upper (umbrella) gear box of a jacquard machine. Due to the need for reversing, there is also an insurmountable problem of reversing power loss. Among them, the main shaft 3 is a horizontal shaft, and the horizontal output shaft end of the jacquard machine commutator 1 needs to be connected to the main shaft 3 through a coupling 2; the eccentric wheel rotates eccentrically with the rotation of the horizontal main shaft 3. The patent application adopts a split and vertically installed double eccentric wheel, namely eccentric wheel 4 and eccentric wheel 5. The double eccentric wheel has an unacceptable processing error. After the double eccentric wheel is assembled on the horizontal main shaft 3, there is still an installation error and the resulting relative The rotation error makes it difficult to implement the two to be truly installed and rotated at 180 degrees to each other. Therefore, the double eccentric wheels, which are the source of motion conversion, have three inherent insurmountable errors. Then, the double eccentric wheels can only be connected to double connecting rods respectively, that is, the eccentric wheel 4 is connected to the first main connecting rod 6 and the eccentric wheel 5 is connected to the second main connecting rod 13. Due to the eccentric rotation error of the eccentric wheels 4 and 5, it is bound to cause the first main connecting rod 6 and the second main connecting rod 13 to have insurmountable motion errors when they move back and forth in the opposite directions. As a result, the first slave swing shaft 12 and the second slave swing shaft 16, which are respectively arranged parallel to the horizontal main shaft 3, also have reverse swing errors, which have a profound negative impact on the jacquard opening movement.

[0004] In addition, paragraph

[0021] of the patent disclosure text discloses that the rotational motion of the vertical shaft of the textile machine (i.e., the universal vertical shaft) is converted into horizontal rotational motion through the commutator 1. It can be seen that the power source of the transmission knife lifting mechanism for the textile machine in this patent is provided by the main motor of the loom. [Summary of the invention]

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a transmission device for driving a swing shaft of a jacquard machine.

[0006] To this end, the present invention adopts the following technical solutions:

[0007] A transmission device for driving a swing shaft of a jacquard machine comprises an eccentric wheel vertical shaft, a conversion mechanism and a swing shaft arranged above the same-direction ends of two sets of lifting knives and swinging in opposite directions. The improvement lies in that the conversion mechanism consists of a single connecting rod swing arm, a single swing arm shaft fixed to the connecting rod swing arm, a single eccentric wheel fixed to the eccentric wheel vertical shaft and a single eccentric wheel connecting rod hinged between the eccentric wheel and the connecting rod swing arm. The swing arm shaft and the eccentric wheel vertical shaft are parallel to each other. The connecting rod swing arm, the eccentric wheel connecting rod, the eccentric wheel vertical shaft and the eccentric wheel are located in a shed-shaped The connecting rod is hinged to the fixed crank which is rigidly connected to the axial end of a swing shaft through a single drivable rod, and the opposite end of the connecting rod is hinged to the transition crank which is movably installed on the opposite axial end of the one swing shaft through a drivable transfer rod, and the transition crank is also hinged to the fixed crank which is rigidly connected to the opposite axial end of another swing shaft through a relay rod. The drivable single rod and the drivable transfer rod are respectively adjacent to the same side of the shuttle eye forming area.

[0008] The above-mentioned swing arm shaft is centrally arranged between the positions where the single rod that can be driven and the transfer rod that can be driven are respectively hinged on the connecting rod swing arm. The small end of the eccentric wheel connecting rod is hinged to the connecting rod swing arm, and the hinge position is between the swing arm shaft and one end of the connecting rod swing arm. The single rod that can be driven and the transfer rod that can be driven are symmetrical to each other.

[0009] The above-mentioned connecting rod swing arm is a two-piece partition-type structure that is symmetrical in the upper and lower parts, and the central horizontal section line of the partition-type connecting rod swing arm in the height direction is coplanar with the central horizontal line of the eccentric wheel connecting rod in the thickness direction, the central horizontal line of the eccentric wheel in the thickness direction, the axis line of the single rod, and the axis line of the adapter rod.

[0010] The eccentric shaft is a long shaft, the lower end of which is directly connected to the output shaft of the lower parachute gearbox of the loom. When the axis of the eccentric shaft aligns with the output axis of the lower parachute gearbox, the universal joint can be eliminated and the eccentric shaft can be extended to connect directly to the output shaft of the lower parachute gearbox. This reduces the cost of configuring and installing the universal joint, as well as the lubrication required for operation.

[0011] The vertical axis of the eccentric wheel is a short axis, and the lower end of the short axis is connected to the output shaft end of the deceleration bevel gear box below the loom through a universal vertical shaft.

[0012] The present invention has the following positive advantages and beneficial effects:

[0013] The existing commutator and its combined structure of input shaft, output shaft, meshing bevel gear and main shaft are replaced by a single-part eccentric wheel vertical shaft. The device is used in jacquard machine. The advantages are clearly reflected in that the existing bevel gear box (commutator) on the jacquard machine with high configuration cost, multiple wearing parts and high operation and maintenance costs can be abandoned, and there is no inefficient and high-noise reversing transmission loss; compared with the existing technology that needs to be processed separately and installed with a 180° difference in the double eccentric wheels and double main connecting rods, this conversion mechanism uses a single eccentric wheel, a single eccentric wheel connecting rod and a single The single connecting rod swing arm of the swing arm shaft has a simple structure. In the process of converting the vertical axis rotational motion of a single eccentric wheel into a swinging motion of the swing arm shaft parallel to it, it can demonstrate the characteristics of good stability and high precision. The connecting rod swing arm processed with a single part and installed horizontally replaces the existing first main connecting rod and second main connecting rod, so that the connecting rod swing arm has the precise reciprocating swingability of the reverse limit position, and thus has the reverse motion synchronization between the driven single rod and the fixed crank for its articulation and the driven transfer rod, relay rod and the fixed crank for its articulation.

[0014] The central setting of the swing arm shaft further enhances the high-precision reciprocating swing characteristics of the reverse extreme positions at both ends of the connecting rod swing arm; the symmetrical setting of the driven single rod and the driven transfer rod enhances the excellent reverse motion synchronization between the two.

[0015] Under the conditions of high stability and high precision motion conversion between parallel axes, the connecting rod swing arm adopts a partition structure, which can enable the single eccentric wheel, single eccentric wheel connecting rod, single connecting rod swing arm, driven single rod and driven transfer rod designed with co-horizontal plane components to achieve smooth and low-judgment operation.

Brief Description of the Drawings

[0016] Figure 1 It is a three-dimensional diagram of one viewing angle of the present invention;

[0017] Figure 2 It is a three-dimensional diagram from another perspective of the present invention;

[0018] Figure 3 yes Figure 1 A top view of

[0019] Figure 4 yes Figure 1 Left view of . [Specific implementation method]

[0020] See Figures 1 to 4 As shown, a transmission device for driving a swing shaft of a jacquard machine includes an eccentric wheel vertical shaft 1, a conversion mechanism, and swing shafts arranged upward between the same-direction ends of two groups of lifting knives and swinging in opposite directions. The improvement is that the conversion mechanism consists of a single connecting rod swing arm 4, a single swing arm shaft 5 fixed to the connecting rod swing arm 4, a single eccentric wheel 2 fixed to the eccentric wheel vertical shaft 1, and a single eccentric wheel connecting rod 3 hinged between the eccentric wheel 2 and the connecting rod swing arm 4. The swing arm shaft 5 is parallel to the eccentric wheel vertical shaft 1. The connecting rod swing arm 4, the eccentric wheel connecting rod 3, the eccentric wheel vertical shaft 1 and the eccentric wheel 2 are located on the same side of the shed forming area W and are each confined outside the shed forming area W. It can be driven One end of the single rod 6 and one end of the driven transfer rod 7 are hinged to the corresponding ends of the connecting rod swing arm 4 respectively, and the other end of the driven single rod 6 is hinged to the fixed crank 80a rigidly connected to the axial end of a swing shaft 8, and the other end of the driven transfer rod 7 is hinged to the transition crank 80b movably mounted on the opposite axial end of a swing shaft 8, and the transition crank 80b which is freely swingable relative to a swing shaft 8 and is provided with a bearing (not marked) is also hinged to the fixed crank 90 rigidly connected to the opposite axial end of another swing shaft 9 through the relay rod 7-1. The driven single rod 6 and the driven transfer rod 7 are respectively adjacent to the same side of the shuttle eye forming area W.

[0021] By adopting the above solution, the cost of the bevel gear box on the jacquard machine, which has a market purchase price of RMB 2,000, can be saved.

[0022] The adjacent knives in the two groups of knives are arranged alternately, that is, one knife in each group of knives is located between two adjacent knives in the other group of knives. One group of knives F and the other group of knives F' are both below one swing axis 8 and the other swing axis 9, see Figure 3 , one set of lifting blades F and the other set of lifting blades F' are parallel to the X axis in the three-axis coordinate system, one swing axis 8 and the other swing axis 9 are parallel to the Y axis in the three-axis coordinate system, and the Y axis and the X axis are co-horizontal and at right angles to each other. Figure 1 、 2 As shown, the vertical axis of the eccentric wheel is parallel to the Z axis in the three-axial coordinate system, and the Z axis is perpendicular to the X axis and the Y axis respectively.

[0023] As shown in the figure, the connecting rod swing arm 4 and the swing arm shaft 5 are located on the outside of the shed forming area W (specifically, outside the X-axis of the three-axial coordinates), the eccentric wheel connecting rod 3 located on the outside of the connecting rod swing arm and the swing arm shaft is also located on the same outside of the shed forming area W, and the eccentric wheel 2 and the eccentric wheel vertical shaft 1 for its installation are also located on the same outside of the shed forming area W.

[0024] The conversion mechanism is used to convert the rotary motion of the eccentric vertical shaft 1 into a force applied by the eccentric connecting rod 3 to the connecting rod swing arm 4 so that it and the swing arm shaft 5 perform reciprocating swing motion as a whole.

[0025] The swing arm shaft 5 is centrally arranged between the positions where the single rod 6 and the transfer rod 7 are hinged on the connecting rod swing arm 4 respectively. The small end of the eccentric wheel connecting rod 3 is hinged to the connecting rod swing arm 4, and the hinge position is between the swing arm shaft 5 and one end or the opposite end of the connecting rod swing arm 4. The single rod 6 and the transfer rod 7 are symmetrical to each other.

[0026] After the symmetrical arrangement, the length between the two hinged ends of the single rod 6 is equal to the length between the two hinged ends of the transfer rod 7, and the distance between the axis of a swing shaft 8 and the hinge position of the single rod 6 at the fixed crank 80a is equal to the distance between the axis of a swing shaft 8 and the hinge position of the transfer rod 7 at the transition crank 80b, and the masses of the single rod 6 and the transfer rod 7 are equal.

[0027] The connecting rod swing arm 4 is a two-piece symmetrical partition structure, and the center horizontal section line of the connecting rod swing arm 4 in the height direction is co-horizontal with the center horizontal line of the eccentric wheel connecting rod 3 in the thickness direction, the center horizontal line of the eccentric wheel 2 in the thickness direction, the axis of the single rod 6, and the axis of the adapter rod 7. Figure 4 Combined with Figure 1 As shown, this co-horizontal plane is parallel to the X-axis in the triaxial coordinate system.

[0028] The two ends of the swing arm shaft 5 extending out of the connecting rod swing arm 4 are respectively provided with bearing seats 5a containing bearings. The shoulder of the swing arm shaft 5 is located between the two plywood of the connecting rod swing arm 4 and the shoulder is fixedly connected to the connecting rod swing arm. The vertical axis of the eccentric wheel is respectively provided with bearing seats 1a containing bearings located above and below the eccentric wheel. The bearing seats 1a and the bearing seats 5a are respectively fixed on the mounting plates (not shown) arranged above and below the frame; the two ends of one swing shaft 8 are respectively provided with bearing seats 8L containing supporting bearings, and the two ends of the other swing shaft 9 are respectively provided with bearing seats 9R containing supporting bearings, and the bearing seats 8L and the bearing seats 9R are respectively fixed on the frame.

[0029] When the eccentric wheel vertical shaft 1 is a long shaft, the lower end of the long shaft is directly connected to the output shaft end of the deceleration bevel gear box installed under the loom, and the lower deceleration bevel gear box is connected to the main motor of the loom. In this case, the cost of a universal vertical shaft with a market purchase price of RMB 1,500 can be saved.

[0030] When the eccentric wheel vertical shaft 1 is a short shaft, the lower end of the short shaft is connected to the output shaft end of the deceleration bevel gear box installed under the loom through a universal vertical shaft, and the lower deceleration bevel gear box is connected to the main motor of the loom.

[0031] The classic structural design is that the output shaft of the commutator of the existing jacquard machine and the horizontal main shaft extending from one side wall panel need to be connected through an intermediate shaft and two elastic diaphragm couplings. However, compared with the existing connection of the horizontal main shaft, intermediate shaft and commutator, the present device can also save two couplings.

[0032] The eccentric wheel vertical shaft 1 is fixedly connected to the eccentric shaft hole of the eccentric wheel 2, and the large end of the eccentric wheel connecting rod 3 is connected to the eccentric wheel 2 through a bearing and its small end is connected to the connecting rod swing arm 4. Under the continuous rotation movement of the eccentric wheel vertical shaft 1, the eccentric wheel connecting rod 3 performs a swinging movement, and the swinging movement is applied to the connecting rod swing arm 4, thereby prompting the connecting rod swing arm 4 to also perform a swinging movement. After that, a two-way transmission chain is carried out that cooperates with each other, that is, one of the ways applies force to the fixed crank 80a through a single rod 6, so that a swing shaft 8 reciprocates back and forth, and the other way first acts on the movable crank 80b with the help of the adapter rod 7, and then follows up with the fixed crank 90 through the relay rod 7-1, realizing the other swing shaft 9 to reciprocate back and forth in opposite directions relative to the one swing shaft 8. Driven by the swinging of the two swing shafts, it is used to realize the two sets of knife lifting mechanisms well known to the public to perform reverse up and down alternating reciprocating movements in the shuttle eye forming area W.

[0033] Compared with the coaxially split vertical eccentric, the horizontal single eccentric 2 has a smaller rotational inertia due to its own weight, while the vertical eccentric has a larger weight due to its own weight when moving from the eccentric low point to the high point.

Claims

1. A transmission device for driving a swing shaft of a jacquard machine, comprising an eccentric vertical shaft, a conversion mechanism, and swing shafts arranged above and between the ends of two sets of knives in the same direction, the swing shafts swinging in opposite directions, characterized in that: The conversion mechanism is composed of a single connecting rod swing arm, a single swing arm shaft fixed to the connecting rod swing arm, a single eccentric wheel fixed to the vertical axis of the eccentric wheel, and a single eccentric wheel connecting rod hinged between the eccentric wheel and the connecting rod swing arm, the swing arm shaft and the vertical axis of the eccentric wheel are parallel to each other, the connecting rod swing arm, the eccentric wheel connecting rod, the vertical axis of the eccentric wheel and the eccentric wheel are located on the same side of the shed forming area and are each confined outside the shed forming area; One end of the connecting rod swing arm is hinged to a fixed crank rigidly connected to the axial end of a swing shaft through a single drivable rod, and the opposite end of the connecting rod swing arm is hinged to a transition crank movably installed on the opposite axial end of the one swing shaft through a drivable transfer rod, and the transition crank is also hinged to a fixed crank rigidly connected to the opposite axial end of another swing shaft through a relay rod. The drivable single rod and the drivable transfer rod are respectively adjacent to the same side of the shuttle eye forming area.

2. The transmission device for driving the swing shaft of the jacquard machine according to claim 1, characterized in that: The swing arm shaft is centrally arranged between the positions where the single rod that can be driven and the transfer rod that can be driven are respectively hinged on the connecting rod swing arm. The small end of the eccentric wheel connecting rod is hinged to the connecting rod swing arm, and the hinge position is between the swing arm shaft and one end of the connecting rod swing arm. The single rod that can be driven and the transfer rod that can be driven are symmetrical to each other.

3. The transmission device for driving the swing shaft of the jacquard machine according to claim 1 or 2, characterized in that: The connecting rod swing arm is a two-piece partition-type structure that is symmetrical in the upper and lower parts, and the central horizontal section line of the partition-type connecting rod swing arm in the height direction is coplanar with the central horizontal line of the connecting rod in the thickness direction, the central horizontal line of the eccentric wheel in the thickness direction, the axis line of the single rod, and the axis line of the adapter rod.

4. The transmission device for driving the swing shaft of the jacquard machine according to claim 1 or 2, characterized in that: The vertical axis of the eccentric wheel is a long axis, and the lower end of the long axis is directly connected to the output shaft end of the deceleration bevel gear box below the loom.

5. The transmission device for driving the swing shaft of the jacquard machine according to claim 1 or 2, characterized in that: The vertical shaft of the eccentric wheel is a short shaft, and the lower end of the short shaft is connected to the output shaft end of the deceleration bevel gear box below the loom through a universal vertical shaft.

Images