Crank drive and loom

Abstract

The application discloses a crank transmission device and a loom, and relates to the technical field of textile machinery. The crank transmission device comprises a clamping seat, an adjusting seat, a bearing assembly, a sliding locking assembly and an adjusting assembly. The clamping seat is provided with an axle connecting hole for connecting a rotating shaft. The adjusting seat is movably arranged on the clamping seat along an adjusting direction. The bearing assembly is arranged on the adjusting seat, and the central axis thereof is parallel to and spaced from the central axis of the axle connecting hole. The adjusting member of the adjusting assembly is rotatably arranged on the clamping seat and is threadedly connected with the adjusting seat. The adjusting member is axially limited relative to the clamping seat. The adjusting member can drive the adjusting seat to move through thread cooperation to change the distance between the two axes. The sliding locking assembly can be switched between a release state and a locking state to allow the adjusting seat to move or fix the adjusting seat to the clamping seat. The application can adjust and stably maintain the eccentricity of the crank transmission device, improve the convenience and reliability of the driving amount adjustment, and is suitable for different weaving conditions.

Description

Technical Field

[0001] This invention relates to the field of textile machinery technology, and in particular to a crank transmission device and a loom. Background Technology

[0002] During operation, a loom typically utilizes a crank drive to convert rotary motion into reciprocating motion, driving the beating, shedding, or other actuators to move cyclically according to a set stroke. The drive amount of the crank drive affects the reciprocating stroke and range of motion of the relevant actuators, making it a crucial component of the loom's transmission system. When weaving different types or specifications of fabrics, the required drive amount for the corresponding actuators in the loom may vary. Fixed crank drives typically cannot adjust their drive amount, making them unsuitable for different weaving conditions. Therefore, crank drives with adjustable drive amounts are needed to broaden the loom's applicability to various fabric types.

[0003] Existing crank transmissions with adjustable drive volume typically consist of numerous components and fasteners. Adjusting the drive volume requires disassembling, moving, or locking multiple components individually, making the adjustment process complex and inconvenient. Therefore, simplifying the drive volume adjustment operation of crank transmissions is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a crank transmission device and a loom to solve the technical problems of existing crank transmission devices with adjustable drive volume having a relatively complex adjustment process and poor operation convenience.

[0005] To achieve the above objectives, the present invention provides a crank transmission device, comprising: A clamping seat, wherein the clamping seat is provided with a shaft connecting part for fixed connection with a rotating shaft, the shaft connecting part having a shaft connecting hole; An adjustment seat is movably disposed on the clamping seat along the adjustment direction; A bearing assembly is disposed on the adjusting seat, wherein the central axis of the bearing assembly is parallel to and spaced apart from the central axis of the shaft connecting hole; A sliding locking assembly is connected between the adjusting seat and the clamping seat. The sliding locking assembly has a released state that allows the adjusting seat to move relative to the clamping seat along the adjusting direction and a locked state that fixes the adjusting seat to the clamping seat. An adjustment assembly includes at least one adjustment member, which is rotatably disposed on the clamping seat and threadedly connected to the adjustment seat. The adjustment member is axially limited relative to the clamping seat along the adjustment direction so that when the adjustment member rotates, the adjustment seat is moved relative to the clamping seat along the adjustment direction through threaded engagement. The distance between the central axis of the bearing assembly and the central axis of the shaft connection hole changes as the adjusting seat moves.

[0006] Preferably, the sliding locking assembly includes at least one sliding groove and at least one fixing member. The sliding groove is disposed in one of the adjusting seat and the clamping seat and extends along the adjusting direction. The fixing member passes through the sliding groove and is connected to the other of the adjusting seat and the clamping seat.

[0007] Preferably, the fastener is a threaded fastener that passes through the sliding groove and is threadedly connected to the other of the adjusting seat and the clamping seat.

[0008] Preferably, there are three sliding grooves and three threaded fasteners. The three sliding grooves are spaced apart around the central axis of the shaft connection hole. Each sliding groove extends along the adjustment direction, and each threaded fastener passes through the corresponding sliding groove.

[0009] Preferably, the adjustment assembly includes a first adjustment member and a second adjustment member disposed opposite to each other along the adjustment direction. The first adjustment member and the second adjustment member are respectively rotatably disposed on the clamping seat and axially limited relative to the clamping seat along the adjustment direction. The first adjustment member and the second adjustment member are respectively threadedly connected to the adjustment seat so as to pull the adjustment seat to move in opposite directions through threaded engagement.

[0010] Preferably, the adjusting seat is provided with two connecting parts arranged opposite to each other along the adjusting direction, and the clamping seat is provided with two limiting holes and two light holes corresponding one-to-one with the two connecting parts; the two connecting parts extend into the corresponding limiting holes and can slide within the corresponding limiting holes along the adjusting direction, each connecting part is provided with a threaded hole extending along the adjusting direction, and each light hole is coaxially arranged with the corresponding threaded hole; the first adjusting member and the second adjusting member are both adjusting bolts, the two adjusting bolts pass through the corresponding light holes and are threadedly connected to the corresponding threaded holes, and the heads of the two adjusting bolts abut against the periphery of the opening of the corresponding light hole away from the connecting part, so that the axial position of the two adjusting bolts relative to the clamping seat remains unchanged during rotation.

[0011] Preferably, the shaft connection portion further has an opening communicating with the shaft connection hole, and the clamping seat includes two clamping portions located on both sides of the opening, and the two clamping portions are connected by clamping fasteners.

[0012] Preferably, the clamping fastener is a clamping bolt, which passes through one of the clamping parts and is threadedly connected to the other clamping part.

[0013] Preferably, the bearing assembly includes an inner bearing ring and an outer bearing ring, the inner bearing ring being connected to the adjusting seat, and the outer bearing ring being used to connect to a reciprocating motion component.

[0014] The present invention also provides a loom, including a rotating shaft, a reciprocating motion component, and a crank transmission device as described in any of the above technical solutions, wherein the clamping seat is fixedly connected to the rotating shaft through the shaft connection portion, and the bearing assembly is drivenly connected to the reciprocating motion component.

[0015] Compared to the aforementioned background technology, the crank transmission device provided by this invention has the following beneficial effects: This invention, by rotating an adjusting member that is axially limited relative to the clamping seat and threadedly connected to the adjusting seat, utilizes the threaded engagement to pull the adjusting seat to move relative to the clamping seat along the adjustment direction, changing the distance between the central axis of the bearing assembly and the axis of the rotating shaft, i.e., changing the eccentricity of the crank transmission device. This allows for adjustment of the output drive amount according to different usage requirements, improving applicability to different weaving conditions. The axial position of the adjusting member relative to the clamping seat remains unchanged during rotation, enabling the stable conversion of the adjusting member's rotation into the linear movement of the adjusting seat, avoiding the axial movement of the adjusting member itself affecting the adjustment reference. The connecting part slides within the limiting hole, and the sliding distance of the adjusting seat can be determined by measuring the gap or gap change between the connecting part and the hole wall along the adjustment direction, which helps improve the measurability and accuracy of eccentricity adjustment. When the sliding locking assembly is in the released state, it allows the adjusting seat to move, which facilitates the adjustment of the drive amount. After the adjustment is completed, the sliding locking assembly fixes the adjusting seat to the clamping seat, so that the adjusted eccentricity remains stable, reducing the possibility of the adjusting seat moving unexpectedly during operation, thereby improving the convenience and reliability of drive amount adjustment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the crank transmission device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the main structure of the crank transmission device provided in an embodiment of the present invention; Figure 3This is a first cross-sectional schematic diagram of the crank transmission device provided in an embodiment of the present invention; Figure 4 This is a second cross-sectional schematic diagram of the crank transmission device provided in an embodiment of the present invention; Figure 5 This is an exploded view of the adjusting seat and the clamping seat provided in an embodiment of the present invention; Figure 6 This is an exploded view of the bearing assembly and adjusting seat provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 110-Clamping seat; 111-Shaft connection part; 112-Shaft connection hole; 113-Opening; 114-Clamping part; 115-Smooth hole; 116-Limiting hole; 120-Adjusting seat; 121-Allowing hole; 122-First threaded hole; 123-Assembly part; 124-Connecting part; 130-Bearing assembly; 131-Bearing inner ring; 132-Bearing outer ring; 140-Sliding locking assembly; 141-Sliding groove; 142-Fixing part; 150-Adjusting assembly; 151-First adjusting part; 152-Second adjusting part; 160-Clamping fastener; 200-Rotating shaft; 300-Reciprocating motion part. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 , Figures 3 to 5As shown, to achieve the above objectives, the present invention provides a crank transmission device, comprising: a clamping seat 110, the clamping seat 110 having a shaft connecting portion 111 for fixed connection with a rotating shaft 200, the shaft connecting portion 111 having a shaft connecting hole 112; an adjusting seat 120 movably disposed on the clamping seat 110 along an adjusting direction; a bearing assembly 130 disposed on the adjusting seat 120, the central axis of the bearing assembly 130 being parallel to and spaced apart from the central axis of the shaft connecting hole 112; and a sliding locking assembly 140 connected between the adjusting seat 120 and the clamping seat 110, the sliding locking assembly 140 having a mechanism allowing the adjusting seat 110 to... The adjustment assembly 150 includes at least one adjusting member rotatably disposed on the clamping seat 110 and threadedly connected to the adjusting seat 120. The adjusting member is axially limited relative to the clamping seat 110 in the adjustment direction, so that when the adjusting member rotates, the threaded connection drives the adjusting seat 120 to move relative to the clamping seat 110 in the adjustment direction. The distance between the central axis of the bearing assembly 130 and the central axis of the shaft connection hole 112 changes with the movement of the adjusting seat 120. Specifically, the clamping seat 110 is disc-shaped or nearly disc-shaped and fixedly connected to the rotating shaft 200. The shaft connection hole 112 passes through the clamping seat 110, and the rotating shaft 200 passes through the shaft connection hole 112 and is fixed to the shaft connection portion 111. Adjusting seat 120 and clamping seat 110 are arranged adjacent to each other along the central axis of shaft connection hole 112. A clearance hole 121 is provided in the middle of adjusting seat 120 to allow clearance from rotating shaft 200 or shaft connection part 111, and to provide space for adjusting seat 120 to move relative to clamping seat 110. The adjustment direction is radial through the central axis of shaft connection hole 112 or parallel to that radial direction. Bearing assembly 130 is installed on the side of adjusting seat 120 facing away from clamping seat 110 and moves synchronously with adjusting seat 120. The distance between the central axis of bearing assembly 130 and the central axis of shaft connection hole 112 constitutes the eccentricity of the crank transmission device. The axis of the adjusting component extends along the adjustment direction. The adjusting component rotates only around its own axis relative to the clamping seat 110 without moving along its own axis. When the adjusting component rotates, it pulls the adjusting seat 120 and the bearing assembly 130 together along the adjustment direction through the threaded engagement with the adjusting seat 120. When the eccentricity increases, the radius of motion of the bearing assembly 130 around the rotation axis 200 increases. When the eccentricity decreases, the radius of motion of the bearing assembly 130 around the rotation axis 200 decreases. This adjusts the driving amount of the reciprocating motion component 300 that is connected to the bearing assembly 130. At the same time, it helps to simplify the composition of the crank transmission device and helps to control the axial dimension of the crank transmission device.The sliding locking component 140 is in the released state before adjustment and switches to the locked state after adjustment to maintain the relative position of the adjusting seat 120 and the clamping seat 110, reducing the possibility of eccentricity changes during operation, thereby improving the convenience and reliability of drive amount adjustment.

[0022] like Figure 2 and Figure 5 As shown, in some embodiments of the present invention, the sliding locking assembly 140 includes at least one sliding groove 141 and at least one fixing member 142. The sliding groove 141 is disposed in one of the adjusting seat 120 and the clamping seat 110 and extends along the adjusting direction. The fixing member 142 passes through the sliding groove 141 and is connected to the other of the adjusting seat 120 and the clamping seat 110. Specifically, the sliding groove 141 is disposed in the clamping seat 110 and the fixing member 142 is connected to the adjusting seat 120, or the sliding groove 141 is disposed in the adjusting seat 120 and the fixing member 142 is connected to the clamping seat 110. As a preferred embodiment, the sliding groove 141 is disposed in the clamping seat 110, the fixing member 142 passes through the sliding groove 141 and is connected to the adjusting seat 120, the rod portion of the fixing member 142 is movable relative to the adjusting seat within the sliding groove 141 along the adjusting direction, and the head of the fixing member 142 spans across both sides of the sliding groove 141. The sliding groove 141 is an elongated groove extending along the adjustment direction. Its length is determined according to the allowable adjustment range of the eccentricity, and its width is greater than the outer diameter of the rod portion of the fixing member 142 and less than the outer diameter of the head of the fixing member 142, so as to take into account both movement guidance and clamping locking. The cooperation between the sliding groove 141 and the fixing member 142 can constrain the movement direction of the adjusting seat 120 and reduce the possibility of the adjusting seat 120 rotating around the central axis of the shaft connection hole 112 during the adjustment process.

[0023] In some embodiments of the present invention, the fastener 142 is a threaded fastener that passes through the sliding groove 141 and is threadedly connected to the other of the adjusting seat 120 and the clamping seat 110. Optionally, the threaded fastener is a bolt, the clamping seat 110 has a sliding groove 141 through which the threaded fastener passes, and the adjusting seat 120 is provided with a first threaded hole 122 that mates with the threaded fastener. Before adjustment, the threaded fastener is loosened so that a gap allowing relative movement is formed between the head of the threaded fastener and the clamping seat 110, allowing the adjusting seat 120 to move along the sliding groove 141; after adjustment, the threaded fastener is tightened so that the head of the threaded fastener presses the adjusting seat 120 and the clamping seat 110 together, so as to maintain their relative positions by means of friction between the contact surfaces. In addition, an elastic washer is provided between the head of the threaded fastener and the surface of the clamping seat 110 to prevent the threaded fastener from loosening due to working vibration.

[0024] In some embodiments of the present invention, there are three sliding grooves 141 and three threaded fasteners. The three sliding grooves 141 are spaced apart around the central axis of the shaft connection hole 112, and each sliding groove 141 extends along the adjustment direction. Each threaded fastener passes through its corresponding sliding groove 141. Specifically, the three sliding grooves 141 are distributed around the periphery of the shaft connection hole 112. The length direction of each sliding groove 141 is parallel to each other and consistent with the adjustment direction. The three threaded fasteners pass through their respective sliding grooves 141 and are spaced apart around the central axis of the shaft connection hole 112, while avoiding the installation areas of the shaft connection part 111, the adjustment assembly 150, and the bearing assembly 130. After releasing the three threaded fasteners, the three threaded fasteners move along their respective sliding grooves 141, jointly guiding the translation of the adjustment seat 120. After locking the three threaded fasteners, the three spaced-apart pressing positions can disperse the locking load, improve the stability of the connection between the adjustment seat 120 and the clamping seat 110, and reduce the possibility of the adjustment seat 120 warping or deflecting under rotational load.

[0025] like Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments of the present invention, the adjusting assembly 150 includes a first adjusting member 151 and a second adjusting member 152 disposed opposite to each other along the adjusting direction. The first adjusting member 151 and the second adjusting member 152 are respectively rotatably disposed on the clamping seat 110 and axially limited relative to the clamping seat 110 along the adjusting direction. The first adjusting member 151 and the second adjusting member 152 are respectively threadedly connected to the adjusting seat 120 so as to pull the adjusting seat 120 to move in opposite directions through threaded engagement. Specifically, the axes of the first adjusting member 151 and the second adjusting member 152 both extend along the adjusting direction and are respectively located on opposite sides of the adjusting seat 120 along the adjusting direction. When it is necessary to move the adjusting seat 120 in one direction, the adjusting member on one side of the target movement direction is tightened, and the adjusting member on the other side is correspondingly loosened. The tightened adjusting member pulls the adjusting seat 120 toward the side where the adjusting member is located through threaded engagement, and the loosened adjusting member provides a corresponding threaded stroke for the movement of the adjusting seat 120. Since the axial positions of the first adjusting member 151 and the second adjusting member 152 relative to the clamping seat 110 remain unchanged, the rotation of the adjusting member can be stably converted into the linear movement of the adjusting seat 120, and the adjusting member itself does not slide axially. The two adjusting members pull and position the adjusting seat 120 from opposite directions to achieve bidirectional adjustment of the eccentricity, and hold the adjusting seat 120 in position before the sliding locking assembly 140 locks.

[0026] In this embodiment, both the first adjusting member 151 and the second adjusting member 152 are adjusting bolts. These adjusting bolts are either external hex head bolts or internal hex head bolts, allowing for rotation using a wrench or an internal hex tool. When adjusting the crank drive amount, first loosen the three threaded fasteners used to lock the adjusting seat 120, then tighten one adjusting bolt according to the target movement direction and correspondingly loosen the other adjusting bolt. The two adjusting bolts maintain a constant axial position relative to the clamping seat 110 during rotation, and pull the adjusting seat 120 to the desired position through their threaded engagement with the adjusting seat 120; subsequently, tighten the three threaded fasteners. Each drive amount adjustment requires only the operation of two adjusting bolts and three threaded fasteners, a total of five screws, which helps reduce disassembly and assembly steps and improves adjustment efficiency.

[0027] like Figure 3 and Figure 5As shown, the adjusting seat 120 has two connecting portions 124 arranged opposite each other along the adjustment direction on the side facing the clamping seat 110. The clamping seat 110 has two limiting holes 116 and two smooth holes 115 corresponding to the two connecting portions 124. The two connecting portions 124 extend into the corresponding limiting holes 116 and can slide along the adjustment direction within the corresponding limiting holes 116 with the adjusting seat 120. The dimension of the limiting hole 116 in the adjustment direction is larger than the dimension of the connecting portion 124 in the adjustment direction, so as to reserve travel for the movement of the connecting portion 124 and the adjusting seat 120. Each connecting portion 124 is provided with a threaded hole extending along the adjustment direction, and each smooth hole 115 is coaxially arranged with the threaded hole on the corresponding connecting portion 124. The first adjusting member 151 and the second adjusting member 152 pass through the corresponding light holes 115 from the outside of the clamping seat 110 and are screwed into the threaded holes on the corresponding connecting part 124. The heads of the two adjusting bolts abut against the periphery of the opening of the corresponding light hole 115 away from the connecting part 124. Since the light hole 115 does not engage with the threaded part of the adjusting bolt, and the head of the adjusting bolt is axially blocked by the clamping seat 110, the first adjusting member 151 and the second adjusting member 152 only rotate around their own axes during the adjustment process, and their axial positions relative to the clamping seat 110 remain unchanged. When one of the adjusting bolts is tightened, the adjusting bolt uses its threaded engagement with the corresponding connecting part 124 to pull the connecting part 124 toward the corresponding light hole 115, causing the connecting part 124 to drive the adjusting seat 120 to move in the direction of the adjusting bolt; at the same time, the other adjusting bolt is loosened accordingly, providing threaded travel for the movement of the adjusting seat 120. When the connecting part 124 slides within the limiting hole 116, a gap is formed between the connecting part 124 and the hole wall of the limiting hole 116 along the adjustment direction, which varies with the position of the adjusting seat 120. By measuring this gap or the amount of change in this gap, the sliding distance of the adjusting seat 120 relative to the clamping seat 110 can be determined, thereby determining the amount of eccentricity adjustment between the bearing assembly 130 and the rotating shaft 200. After adjusting to the desired position, the sliding locking assembly 140 is locked to maintain the relative position of the adjusting seat 120 and the clamping seat 110.

[0028] In some embodiments of the present invention, the shaft connecting portion 111 further has an opening 113 communicating with the shaft connecting hole 112, and the clamping seat 110 includes two clamping portions 114 located on both sides of the opening 113, the two clamping portions 114 being connected by clamping fasteners 160. Specifically, the shaft connecting portion 111 forms an annular structure with an opening 113 around the shaft connecting hole 112, the opening 113 penetrating the shaft connecting portion 111 radially through the shaft connecting hole 112, and the two clamping portions 114 being formed on both sides of the opening 113. The two clamping portions 114 are integrally formed with the clamping seat 110. The clamping fastener 160 connects the two clamping parts 114 and applies a force to them to bring them closer together, reducing the width of the opening 113 and pressing the wall of the shaft connection hole 112 against the rotating shaft 200. When the clamping fastener 160 is released, the clamping force between the two clamping parts 114 decreases, making it easier to adjust the axial or circumferential position of the clamping seat 110 on the rotating shaft 200. Furthermore, the open shaft connection part 111 allows for adjustment of the clamping force via the clamping fastener 160 and can compensate for manufacturing deviations between the outer diameter of the rotating shaft 200 and the diameter of the shaft connection hole 112.

[0029] In some embodiments, the clamping fastener 160 is a clamping bolt, which passes through one clamping part 114 and is threadedly connected to the other clamping part 114. Specifically, one clamping part 114 is provided with a through hole for the clamping bolt to pass through, and the other clamping part 114 is provided with a second threaded hole that mates with the clamping bolt. The clamping bolt passes through the through hole and is screwed into the second threaded hole in sequence. The clamping bolt is an internal hex bolt or an external hex bolt. When the clamping bolt is tightened, the head of the clamping bolt and the threaded connection part together pull the two clamping parts 114 closer together, so that the shaft connection hole 112 clamps the rotating shaft 200. When the clamping bolt is loosened, the two clamping parts 114 can move away from each other under the elasticity of the material, so as to reduce the clamping force on the rotating shaft 200. The axis of the clamping bolt can be perpendicular to the extension direction of the opening 113 or form an acute angle with the extension direction of the opening 113, as long as it can cause the two clamping parts 114 to move closer to each other.

[0030] like Figure 1 , Figure 4 and Figure 6As shown, in some embodiments of the present invention, the bearing assembly 130 includes an inner bearing ring 131 and an outer bearing ring 132. The inner bearing ring 131 is connected to the adjusting seat 120, and the outer bearing ring is used to connect with the reciprocating motion component 300. Specifically, the inner bearing ring 131 and the outer bearing ring 132 are coaxially arranged, and rolling elements are provided between the inner bearing ring 131 and the outer bearing ring 132 to allow the inner bearing ring 131 and the outer bearing ring 132 to rotate relative to each other. The adjusting seat 120 is provided with an assembly portion 123 that mates with the inner bearing ring 131. The inner bearing ring 131 is fitted and fixed to the assembly portion 123. The inner bearing ring 131 and the assembly portion 123 are interference-fitted so that the inner bearing ring 131 can move synchronously with the adjusting seat 120, and the inner bearing ring 131 is held in the assembly portion 123 by a retaining ring. The outer ring 132 of the bearing is directly connected to the external reciprocating motion component 300. The reciprocating motion component 300 is a connecting rod, swing arm, or transmission arm in the weft insertion mechanism or shedding mechanism of a loom. The outer ring 132 of the bearing is connected to the reciprocating motion component 300. When the rotating shaft 200 drives the clamping seat 110 and the adjusting seat 120 to rotate, the bearing assembly 130 moves eccentrically around the axis of the rotating shaft 200 along with the adjusting seat 120. The outer ring 132 of the bearing transmits this eccentric motion to the reciprocating motion component 300 to drive the reciprocating motion component 300 to reciprocate. The inner ring 131 of the bearing and the outer ring 132 of the bearing can rotate relative to each other to reduce the direct transmission of the rotational motion of the adjusting seat 120 to the reciprocating motion component 300, thereby reducing the rotational resistance and wear at the connection point between the two. When the adjusting seat 120 moves relative to the clamping seat 110, the bearing assembly 130 moves along with the adjusting seat 120, which changes the distance between the central axis of the bearing assembly 130 and the central axis of the shaft connection hole 112, thereby changing the driving amount of the reciprocating motion component 300 to adapt to different weaving conditions.

[0031] In addition to the aforementioned crank transmission device, the present invention also provides a loom, including a rotating shaft 200, a reciprocating motion component 300, and the crank transmission device of any of the above embodiments. A clamping seat 110 is fixedly connected to the rotating shaft 200 via a shaft connection portion 111, and a bearing assembly 130 is drive-connected to the reciprocating motion component 300. Specifically, the rotating shaft 200 is driven by the loom's power mechanism, and the crank transmission device is fixed to the rotating shaft 200 via the clamping seat 110 and rotates synchronously with the rotating shaft 200. The reciprocating motion component 300 can be a connecting rod, swing arm, or transmission arm in the weft insertion mechanism or shedding mechanism. The bearing assembly 130 is connected to the reciprocating motion component 300 via a bearing outer ring 132, and is also connected to the reciprocating motion component 300 via a connecting rod or transmission arm. When the rotating shaft 200 rotates, the central axis of the bearing assembly 130 moves eccentrically around the axis of the rotating shaft 200, and drives the reciprocating motion component 300 to reciprocate periodically via the connecting rod or transmission arm. When the weaving type changes, the sliding locking component 140 is released according to the required reciprocating stroke, and the adjusting component 150 is operated to change the eccentricity between the bearing component 130 and the rotating shaft 200. Then the sliding locking component 140 is switched to the locked state, so that the loom can adapt to different drive requirements without replacing the entire crank transmission device.

[0032] The working principle of the present invention is as follows: during installation, the rotating shaft 200 is inserted into the shaft connection hole 112, and the clamping seat 110 clamps the rotating shaft 200 by the clamping fastener 160, and then the bearing assembly 130 is connected to the reciprocating motion component 300 of the loom for transmission. When the drive amount needs to be adjusted, first switch the sliding locking assembly 140 to the released state, so that the adjusting seat 120 can move relative to the clamping seat 110 in the adjustment direction; then rotate the first adjusting member 151 and the second adjusting member 152. With the axial position of the two adjusting members remaining unchanged relative to the clamping seat 110, the connecting part 124 and the adjusting seat 120 are pulled to slide in the limiting hole 116 by the threaded engagement with the connecting part 124. The sliding distance of the adjusting seat 120 is determined by measuring the gap or gap change between the connecting part 124 and the hole wall of the limiting hole 116 in the adjustment direction, so that the distance between the central axis of the bearing assembly 130 and the axis of the rotating shaft 200 reaches the target value; after adjusting to the target position, switch the sliding locking assembly 140 to the locked state, so that the adjusting seat 120 is fixed to the clamping seat 110. When the loom is running, the rotating shaft 200 drives the clamping seat 110, the adjusting seat 120 and the bearing assembly 130 to rotate together. The bearing assembly 130 makes an eccentric motion with a set eccentricity and drives the reciprocating motion component 300 to move. The sliding locking component 140 keeps the position of the adjusting seat 120 so that the output drive amount remains stable during operation.

[0033] In summary, by rotating the adjusting member which is axially limited relative to the clamping seat 110 and threadedly connected to the connecting part 124, the adjusting member pulls the connecting part 124 and the adjusting seat 120 along the adjustment direction through the threaded engagement, thereby changing the distance between the two axes; by switching between the released state and the locked state of the sliding locking assembly 140, the adjusting seat 120 can be moved or fixed to the clamping seat 110, thereby adjusting and stabilizing the eccentricity of the crank transmission device, improving the convenience and reliability of drive quantity adjustment, and making it suitable for different weaving conditions.

[0034] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0035] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A crank transmission device, characterized in that, include: A clamping seat (110) is provided with a shaft connection part (111) for fixed connection with a rotating shaft (200), and the shaft connection part (111) has a shaft connection hole (112). An adjusting seat (120) is movably disposed on the clamping seat (110) in the adjusting direction; A bearing assembly (130) is disposed on the adjusting seat (120), and the central axis of the bearing assembly (130) is parallel to and spaced apart from the central axis of the shaft connecting hole (112); A sliding locking assembly (140) is connected between the adjusting seat (120) and the clamping seat (110). The sliding locking assembly (140) has a released state that allows the adjusting seat (120) to move relative to the clamping seat (110) along the adjusting direction and a locked state that fixes the adjusting seat (120) to the clamping seat (110). An adjustment assembly (150) includes at least one adjustment member, which is rotatably disposed on the clamping seat (110) and threadedly connected to the adjustment seat (120). The adjustment member is axially limited relative to the clamping seat (110) along the adjustment direction, so that when the adjustment member rotates, the adjustment seat (120) is moved relative to the clamping seat (110) along the adjustment direction through threaded engagement. The distance between the central axis of the bearing assembly (130) and the central axis of the shaft connection hole (112) changes as the adjusting seat (120) moves.

2. The crank transmission device according to claim 1, characterized in that, The sliding locking assembly (140) includes at least one sliding groove (141) and at least one fixing member (142). The sliding groove (141) is disposed in one of the adjusting seat (120) and the clamping seat (110) and extends along the adjusting direction. The fixing member (142) passes through the sliding groove (141) and is connected to the other of the adjusting seat (120) and the clamping seat (110).

3. The crank transmission device according to claim 2, characterized in that, The fastener (142) is a threaded fastener that passes through the sliding groove (141) and is threadedly connected to the other of the adjusting seat (120) and the clamping seat (110).

4. The crank transmission device according to claim 3, characterized in that, There are three sliding grooves (141) and three threaded fasteners. The three sliding grooves (141) are spaced apart around the central axis of the shaft connection hole (112). Each sliding groove (141) extends along the adjustment direction. Each threaded fastener passes through the corresponding sliding groove (141).

5. The crank transmission device according to claim 1, characterized in that, The adjustment assembly (150) includes a first adjustment member (151) and a second adjustment member (152) arranged opposite to each other along the adjustment direction. The first adjustment member (151) and the second adjustment member (152) are respectively rotatably arranged on the clamping seat (110) and axially limited relative to the clamping seat (110) along the adjustment direction. The first adjustment member (151) and the second adjustment member (152) are respectively threadedly connected to the adjustment seat (120) so as to pull the adjustment seat (120) to move in opposite directions through threaded engagement.

6. The crank transmission device according to claim 5, characterized in that, The adjusting seat (120) is provided with two connecting parts (124) arranged opposite to each other along the adjusting direction. The clamping seat (110) is provided with two limiting holes (116) and two light holes (115) corresponding one-to-one with the two connecting parts (124). The two connecting parts (124) extend into the corresponding limiting holes (116) and can slide within the corresponding limiting holes (116) along the adjusting direction. Each connecting part (124) is provided with a threaded hole extending along the adjusting direction. The light holes (115) are all coaxially arranged with the corresponding threaded holes; the first adjusting member (151) and the second adjusting member (152) are both adjusting bolts. The two adjusting bolts pass through the corresponding light holes (115) and are threadedly connected to the corresponding threaded holes. The heads of the two adjusting bolts abut against the periphery of the opening of the corresponding light hole (115) away from the connecting part (124) so ​​that the axial position of the two adjusting bolts relative to the clamping seat (110) remains unchanged during rotation.

7. The crank transmission device according to claim 1, characterized in that, The shaft connection part (111) also has an opening (113) communicating with the shaft connection hole (112), and the clamping seat (110) includes two clamping parts (114) located on both sides of the opening (113), and the two clamping parts (114) are connected by a clamping fastener (160).

8. The crank transmission device according to claim 7, characterized in that, The clamping fastener (160) is a clamping bolt, which passes through one of the clamping parts (114) and is threadedly connected to the other clamping part (114).

9. The crank transmission device according to claim 1, characterized in that, The bearing assembly (130) includes an inner bearing ring (131) and an outer bearing ring (132). The inner bearing ring (131) is connected to the adjusting seat (120), and the outer bearing ring (132) is used to connect to the reciprocating motion component (300).

10. A loom, characterized in that, It includes a rotating shaft (200), a reciprocating motion component (300), and a crank transmission device according to any one of claims 1 to 9, wherein the clamping seat (110) is fixedly connected to the rotating shaft (200) via the shaft connection portion (111), and the bearing assembly (130) is drively connected to the reciprocating motion component (300).

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