Water-jet loom and water pump driving mechanism thereof

Abstract

According to the water-jet loom and the water pump driving mechanism thereof provided by the utility model, the cam connecting rod is driven to rotate clockwise or anticlockwise around the connecting rod shaft through the rotational motion of the cam, and meanwhile, the cam connecting rod can pull the plunger and the cylinder body of the water pump to do linear reciprocating motion relative to the pump body through the connecting piece in the rotating process; meanwhile, the water pump is driven to complete the water spraying action, and the load borne by the spring arranged between the pump body and the cylinder body is in direct proportion to the pressure borne by the cam and the supporting idler wheel on the cam connecting rod. According to the scheme, the ratio of the distance L1 from the axis of the cam connecting rod to the axis of the supporting roller to the distance L2 from the axis of the cam connecting rod to the hinge point of the connecting piece and the cam connecting rod is designed to be 1.5-2, so that the pressure borne by the contact face of the cam and the supporting roller is smaller than the load borne by the spring. In a water pump driving mechanism which needs larger spring load to realize weft insertion action, the impact generated by the action of a supporting roller and an intermittent cam is greatly reduced, and the service life of the cam and a cam follower is greatly prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of water jet looms, and particularly relates to a water jet loom and a water pump driving mechanism thereof. Background Art

[0002] The water pump driving mechanism of a water jet loom is a key component for realizing the water jet action. The water pump driving mechanism of a traditional water jet loom usually includes a cam, a cam connecting rod, a plunger, and a water pump spring. The cam can push the plunger to reciprocate relative to the pump body by cooperating with the cam connecting rod, and the water pump spring can control the rapid return of the plunger.

[0003] At present, in the water pump driving mechanism of a traditional water jet loom, the contact track surface between the cam and the cam follower is under the same pressure as the load borne by the helical spring. The water pump spring usually requires a large spring load to realize the weft insertion action. The large spring load and the intermittent cam action generate severe spring impacts, greatly shortening the service life of the cam and the cam follower.

[0004] Therefore, how to overcome the above technical defects is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a water jet loom and a water pump driving mechanism thereof, which can effectively improve the service life of the cam and the cam follower.

[0006] To solve the above technical problems, the utility model provides a water pump driving mechanism of a water jet loom, which includes a cam, a cam connecting rod, a connecting piece, and a water pump. The water pump includes a pump body, a cylinder block, a spring, and a plunger.

[0007] The cam is rotatably arranged on the shell of the water jet loom. The cam connecting rod is L-shaped. The middle part of the cam connecting rod is rotatably arranged on the shell through a connecting rod shaft. One end of the cam connecting rod is rotatably provided with a support roller. The support roller moves in a point or line contact manner with the cam. The other end of the cam connecting rod is hinged to one end of the plunger through the connecting piece. The other end of the plunger is fixedly connected to the cylinder block. The outside of the cylinder block is sleeved with the pump body and can slide relative to the pump body. The spring is sleeved outside the cylinder block and is respectively connected to the cylinder block and the pump body at both ends.

[0008] Wherein, the distance from the axis of the cam connecting rod to the axis of the support roller is L1, and the distance from the axis of the cam connecting rod to the hinge point between the connecting piece and the cam connecting rod is L2. The ratio of L1 to L2 is 1.5 - 2.

[0009] Optionally, in the above water jet loom and its water pump driving mechanism, a connecting bracket is further included. Both ends of the connecting bracket are respectively hinged to the connecting rod shaft and the pump body.

[0010] Optionally, in the above water jet loom and its water pump drive mechanism, a limit member is further included, and the limit member is used to limit the extreme position of the rotation of the tail of the connecting rod of the cam connecting rod.

[0011] Optionally, in the above water jet loom and its water pump drive mechanism, the limit member is a telescopic mechanism, the fixed end of the telescopic mechanism is connected to the wall panel of the water jet loom, and the movable end of the telescopic mechanism is used to limit the movement of the tail of the connecting rod.

[0012] Optionally, in the above water jet loom and its water pump drive mechanism, the limit member includes a limit plate and a limit bolt, a threaded hole is formed in the limit plate, and the limit bolt is matched with the threaded hole.

[0013] Optionally, in the above water jet loom and its water pump drive mechanism, the water pump is provided with a water inlet and a water outlet communicated with the space inside the pump body, and the water inlet is communicated with the water tank through a water inlet pipe.

[0014] Optionally, in the above water jet loom and its water pump drive mechanism, a one-way valve is connected in series on the water inlet pipe, and a nozzle is arranged on the water outlet.

[0015] Optionally, in the above water jet loom and its water pump drive mechanism, the other end of the cam connecting rod is connected to one end of the connecting piece through a pin shaft, and the other end of the connecting piece is connected to one end of the plunger through a pin shaft.

[0016] Optionally, in the above water jet loom and its water pump drive mechanism, a piston is arranged at the other end of the plunger, and the piston slides in the cavity of the cylinder block.

[0017] The present invention further provides a water jet loom, including the water pump drive mechanism as described in the above embodiment.

[0018] The present invention provides a water pump drive mechanism for a water jet loom, and its beneficial effects are as follows:

[0019] The rotary motion of the cam drives the cam link to rotate clockwise or counterclockwise around the link shaft. At the same time, during the rotation of the cam link, it can pull the plunger and cylinder block of the water pump through the connecting piece to make a linear reciprocating motion relative to the pump body, and at the same time drive the water pump to complete the water spraying action. The load on the spring provided between the pump body and the cylinder block is proportional to the pressure on the support roller on the cam and the cam link. Therefore, in this case, the ratio of the distance L1 from the axis of the cam link to the axis of the support roller to the distance L2 from the axis of the cam link to the hinge point of the connecting piece and the cam link is designed to be 1.5 - 2, so that the pressure on the contact surface between the cam and the support roller is less than the load on the spring. In the water pump drive mechanism of high-speed, heavy-load, wide-width looms, etc., which require a large spring load to achieve the weft insertion action, the impact generated by the support roller and the intermittent cam action is greatly reduced, and the service life of the cam and the cam follower is greatly improved.

[0020] The present utility model also provides a water jet loom, including the water pump drive mechanism of the above-mentioned water jet loom, which has the same beneficial effects and will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0022] Figures 1-3 is a schematic structural diagram of a water pump drive mechanism of a water jet loom provided by an embodiment of the present utility model ( Figures 1-2 is for the cam to make a clockwise rotary motion from a small radius to a large radius, Figure 3 is for the cam to make a clockwise rotary motion from the maximum radius to a small radius);

[0023] Figure 4 is a schematic structural diagram of a limiting member provided by an embodiment of the present utility model.

[0024] In the above figures:

[0025] 100 - cam;

[0026] 200 - cam link; 210 - link shaft; 220 - pin shaft; 230 - link tail;

[0027] 300 - support roller;

[0028] 400 - connecting piece;

[0029] 500 - limiting member; 510 - limiting plate; 520 - limiting bolt;

[0030] 600 - connecting bracket;

[0031] 710 - cylinder block; 720 - pump body; 730 - spring; 740 - plunger;

[0032] A - space inside the pump body; L1 - distance from the axis of the cam link to the axis of the support roller; L2 - distance from the axis of the cam link to the hinge point of the connecting piece and the cam link. Specific embodiments

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0034] The core of the present invention is to provide a water jet loom and its water pump driving mechanism, which can effectively improve the service life of the cam and the cam follower.

[0035] In order to enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0036] Specifically, please refer to Figures 1-4 , a water pump driving mechanism of a water jet loom provided by the present invention includes a cam 100, a cam link 200, a connecting piece 400 and a water pump. The water pump includes a pump body 720, a cylinder block 710, a spring 730 and a plunger 740.

[0037] The cam 100 is rotatably arranged on the housing of the water jet loom. The cam link 200 is in an L shape. The middle part of the cam link 200 is rotatably arranged on the housing through a link shaft 210, so as to realize the rotation of the cam link 200 around the link shaft 210.

[0038] A support roller 300 is rotatably arranged at one end of the cam link 200. The support roller 300 moves in a point or line contact manner with the cam 100. The other end of the cam link 200 is hinged to one end of the plunger 740 through a connecting piece 400. The other end of the plunger 740 is fixedly connected to the cylinder block 710. The outside of the cylinder block 710 is sleeved with a pump body 720 and can slide relative to the pump body 720. The spring 730 is sleeved outside the cylinder block 710 and is respectively connected to the cylinder block 710 and the pump body 720 at both ends. The spring 730 can provide an elastic restoring force for the movement of the cylinder block 710 in the pump body 720.

[0039] Among them, the distance from the axis of the cam link 200 to the axis of the support roller 300 is L1, the distance from the axis of the cam link 200 to the hinge point between the connecting piece 400 and the cam link 200 is L2, and the ratio of L1 to L2 is 1.5 - 2.

[0040] The working principle of the water pump drive mechanism is as follows:

[0041] During the rotary motion of the cam 100, when the contact position between the cam 100 and the support roller 300 is in the small radius region and is rotating towards the large radius region, as Figure 3 shown, the cam 100 contacts the support roller 300, and (the cam 100) presses down one end of the cam link 200 to rotate in one direction around the link shaft 210. The other end of the cam link 200 rotates synchronously and can pull the connecting piece 400 and the plunger 740 to slide quickly towards the outside of the pump body 720 (the left side in the figure), pulling the spring 730 fixed on the plunger 740 to slide along the surface of the cylinder block 710. At this time, the spring 730 is compressed.

[0042] Due to the negative pressure effect, the space A in the pump body gradually fills with water until the contact position between the cam 100 and the support roller 300 is at the maximum radius, and the plunger 740 realizes the water absorption action. At this time, the connecting rod tail 230 rotates to the maximum limit position, as Figure 3 shown.

[0043] When the cam 100 continues to rotate and returns from the maximum radius of the cam 100 to the small radius, due to the sudden decrease in the radius of the cam 100, the cam 100 is forced to disengage from the support roller 300. The elastic potential energy of the spring 730 is fully released, pulling the plunger 740 and the connected connecting piece 400 to move quickly towards the inside (i.e., the right side in the figure). Driving the cam link 200 to rotate counterclockwise around the link shaft 210. The water in the space A in the pump body is pushed by the piston provided at the other end of the plunger 740 to realize the water spraying action, as Figure 2 shown.

[0044] The water pump driving mechanism of the water jet loom provided by this solution drives the cam link 200 to rotate clockwise or counterclockwise around the link shaft 210 through the rotary motion of the cam 100. At the same time, during the rotation of the cam link 200, it can pull the plunger 740 and the cylinder block 710 of the water pump to make a linear reciprocating motion relative to the pump body 720 through the connecting piece 400, and at the same time drive the water pump to complete the water spraying action. The load on the spring 730 arranged between the pump body 720 and the cylinder block 710 is proportional to the pressure on the support roller 300 on the cam 100 and the cam link 200. Therefore, in this case, the ratio of the distance L1 from the axis of the cam link 200 to the axis of the support roller 300 to the distance L2 from the axis of the cam link 200 to the hinge point of the connecting piece 400 and the cam link 200 is designed to be 1.5 - 2, so that the pressure on the contact surface between the cam 100 and the support roller 300 is less than the load on the spring 730.

[0045] In the water pump driving mechanisms of high-speed, heavy-load, wide-width looms, etc., which require a relatively large load on the spring 730 to achieve the weft insertion action, the impact generated by the intermittent movement of the support roller 300 and the cam 100 is greatly reduced, and the service life of the cam 100 and the cam 100 follower is greatly improved.

[0046] The cam 100 follower in this case is the cam link 200, the support roller 300, the connecting piece 400, etc. The link shaft 210 can be a cantilever shaft.

[0047] During the actual working process, the cam 100 will cause the link shaft 210 to have a radial swing under the influence of the load on the spring 730 during the rotary motion. The support roller 300 will also be impacted and jump under the action of the elastic force caused by the load on the spring 730, reducing the transmission accuracy of the plunger 740 and the water flow stability, and at the same time shortening the fatigue life of the cam 100 and the support roller 300.

[0048] To effectively solve the above problems, as Figure 1 shown, this case also includes a connecting bracket 600, and both ends of the connecting bracket 600 are hinged to the link shaft 210 and the pump body 720 respectively.

[0049] The connecting frame connects the link shaft 210 and the pump body 720 into one body, thereby increasing the rigidity of the link shaft 210, effectively reducing the influence of the load on the spring 730 on the link shaft 210 during the rotation of the cam 100, and improving the weft insertion accuracy.

[0050] The connecting bracket 600 can be a rod-shaped structure, and other forms of structures can also be adopted to improve the structural strength.

[0051] In a specific embodiment, as Figure 2As shown in the figure, the solution further includes a limiting member 500, which is used to limit the extreme position of the rotation of the connecting rod tail 230 of the cam connecting rod 200. When the contact position between the cam 100 and the support roller 300 is at the minimum radius, the connecting rod tail 230 abuts against the limiting member 500, that is, the connecting rod tail 230 rotates to the (maximum) extreme position.

[0052] Furthermore, the limiting member 500 is a telescopic mechanism. The fixed end of the telescopic mechanism is connected to the wall panel, and the movable end of the telescopic mechanism is used to limit the movement of the connecting rod tail 230. By adjusting the length of the telescopic mechanism, the adjustment of the rotation angle range of the cam connecting rod 200 can be realized.

[0053] Specifically, the limiting member 500 includes a limiting plate 510 and a limiting bolt 520. A threaded hole is provided on the limiting plate 510, and the limiting bolt 520 is matched with the threaded hole. The limiting plate 510 is the fixed end of the limiting member 500 and can be connected to the wall panel or be an integrally formed structure with the wall panel. The limiting bolt 520 is the movable end of the limiting member 500. The head of the limiting bolt 520 can abut against the connecting rod tail 230 to limit the rotation of the cam connecting rod 200.

[0054] Of course, the limiting member 500 can also adopt other forms of structures and be arranged on the wall of the water jet loom in a fixed connection or detachable connection manner.

[0055] The water pump is provided with an inlet and an outlet that communicate with the inner space of the pump body 720. The inlet is connected to the water tank through an inlet pipe, a check valve is connected in series on the inlet pipe, and a nozzle is provided on the outlet.

[0056] Of course, a check valve can also be connected in series on the outlet pipe provided on the outlet. The check valve can ensure the unidirectional flow of water, that is, from the water tank into the water pump and finally sprayed out through the nozzle.

[0057] The suction process of the water pump in actual operation is as follows:

[0058] When the cam 100 rotates from a small radius to a large radius, the plunger 740 moves outward (i.e., to the left in the figure), compressing the spring 730 of the water pump. A negative pressure is formed inside the water pump, the inlet check valve opens, and water is sucked into the water pump from the water tank.

[0059] The spraying process of the water pump in actual operation is as follows:

[0060] When the cam 100 suddenly drops from the maximum radius to the minimum radius, the spring 730 of the water pump pushes the plunger 740 to quickly move inward (i.e., to the right in the figure). The pressure directly acts on the water column sucked into the water pump. The check valve on the inlet pipe closes, and the check valve on the outlet pipe opens. Water is pressed out of the water pump and then sprayed out through the nozzle on the outlet pipe.

[0061] The other end of the plunger 740 is a piston, which slides within the cavity of the cylinder block 710, facilitating the free sliding of the plunger 740 within the cylinder block 710 and ensuring airtightness as much as possible. The other end of the cam link 200 is connected to one end of the connecting piece 400 by a pin shaft 220, and the other end of the connecting piece 400 is connected to one end of the plunger 740 by a pin shaft 220, enabling hinge connections between components.

[0062] In addition, this solution also provides a water jet loom, which includes a water pump drive mechanism as in the above specific embodiments.

[0063] Obviously, the water jet loom incorporating the above water pump drive mechanism has the same beneficial effects and will not be elaborated further here.

[0064] In the description of this application, it should be understood that for orientation descriptions, such as up, down, front, back, left, right, etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application.

[0065] As shown in this application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. An element defined by the statement "including one..." does not exclude the existence of other identical elements in the process, method, commodity, or device including the element.

[0066] In the description of this application, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above words in this application in combination with the specific content of the technical solution.

[0067] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the embodiments can be referred to each other.

[0068] Specific examples are used in this article to elaborate on the principles and implementation manners of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the technical field, without departing from the principles of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A water pump driving mechanism for a water jet loom, characterized in that: It includes a cam, a cam connecting rod, a connecting piece and a water pump, wherein the water pump includes a pump body, a cylinder body, a spring and a plunger; The cam is rotatably arranged on the housing of the water jet loom, the cam connecting rod is L-shaped, the middle part of the cam connecting rod is rotatably arranged on the housing through a connecting rod shaft, one end of the cam connecting rod is rotatably provided with a supporting roller, the supporting roller moves with the cam in a point or line contact manner, the other end of the cam connecting rod is hinged to one end of the plunger through the connecting piece, the other end of the plunger is fixedly connected to the cylinder body, the outer side of the cylinder body is sleeved with the pump body and can slide relative to the pump body, the spring is sleeved on the outer side of the cylinder body and the two ends are respectively connected to the cylinder body and the pump body; Among them, the distance from the axis of the cam connecting rod to the axis of the supporting roller is L1, the distance from the axis of the cam connecting rod to the hinge point between the connecting plate and the cam connecting rod is L2, and the ratio of L1 to L2 is 1.5-2.

2. The water pump driving mechanism of the water jet loom according to claim 1, characterized in that: It also includes a connecting bracket, both ends of which are hinged to the connecting rod shaft and the pump body respectively.

3. The water pump driving mechanism of the water jet loom according to claim 1, characterized in that: It also includes a limiting member, which is used to limit the extreme position of the rotation of the tail of the cam connecting rod.

4. The water pump driving mechanism of the water jet loom according to claim 3, characterized in that: The limiting member is a retractable mechanism, the fixed end of the retractable mechanism is connected to the wall panel of the water jet loom, and the movable end of the retractable mechanism is used to limit the movement of the tail of the connecting rod.

5. The water pump driving mechanism of the water jet loom according to claim 4, characterized in that: The limiting member comprises a limiting plate and a limiting bolt. A threaded hole is formed on the limiting plate, and the limiting bolt cooperates with the threaded hole.

6. The water pump driving mechanism of the water jet loom according to claim 1, characterized in that: The water pump is provided with a water inlet and a water outlet which are connected with the space inside the pump body, and the water inlet is connected with the water tank through a water inlet pipe.

7. The water pump driving mechanism of the water jet loom according to claim 6, characterized in that: A one-way valve is connected in series on the water inlet pipe, and a nozzle is arranged on the water outlet.

8. The water pump driving mechanism of a water jet loom according to claim 1, characterized in that: The other end of the cam connecting rod is connected to one end of the connecting plate through a pin shaft, and the other end of the connecting plate is connected to one end of the plunger through a pin shaft.

9. The water pump driving mechanism of a water jet loom according to claim 1, characterized in that: The other end of the plunger is provided with a piston, and the piston slides in the cavity of the cylinder body.

10. A water jet loom, characterized in that: It comprises a water pump driving mechanism as described in any one of claims 1 to 9.

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