A water-jet loom self-lubricating water pump driving device and water-jet loom

Abstract

The utility model discloses a water jet loom self -lubricating water pump drive arrangement and water jet loom relates to water jet loom technical field, water jet loom self -lubricating water pump drive arrangement includes cam, water pump, connecting rod and connecting assembly, and cam is sleeved in drive shaft and can rotate around the axis of drive shaft, water pump includes the plunger joint of being equipped with first through -hole, connecting rod is sleeved in the axle body and can rotate around the axis of axle body, and connecting rod includes first connecting end and second connecting end, and first connecting end is equipped with the support gyro wheel for with cam contact, and second connecting end is equipped with second through -hole, connecting assembly includes the first bearing of being assembled in first through -hole, the second bearing of being assembled in second through -hole and the transmission assembly of being connected to first bearing and second bearing, and transmission assembly is equipped with the accommodation cavity, and the accommodation cavity is used to accommodate first lubricating grease to lubricate first bearing and second bearing. Can effectively improve the phenomenon that first lubricating grease splashes under the periodic vibration.

Description

Technical Field

[0001] This utility model relates to the field of water jet loom technology, and in particular to a self-lubricating water pump drive device for a water jet loom and a water jet loom. Background Technology

[0002] Water jet looms are shuttleless looms that use water jets to guide the weft yarns to complete the weft insertion operation. They are mainly used in the manufacturing of chemical fiber filament fabrics. They achieve high-density warp and weft yarn interlacing through high-pressure water jets and have the characteristics of stable fabric quality and high production efficiency.

[0003] Water jet looms use a cam and connecting rod to drive the plunger joint of a water pump to move back and forth, which is used to spray water for weft insertion. In the prior art, the bearing between the connecting rod and the plunger joint needs to be lubricated with lubricating oil. Under periodic vibration, the lubricating oil will splash and pollute the surrounding environment.

[0004] Therefore, how to effectively improve the phenomenon of lubricating oil splashing under periodic vibration based on the bearing between the connecting rod and the plunger joint is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a self-lubricating water pump drive device for a water jet loom and a water jet loom, which can effectively improve the phenomenon of lubricating oil splashing under periodic vibration, based on the bearing between the lubricating connecting rod and the plunger joint.

[0006] To achieve the above objectives, this utility model provides a self-lubricating water pump drive device for a water jet loom, comprising:

[0007] A cam is fitted onto a drive shaft and is able to rotate about the axis of the drive shaft;

[0008] A water pump, including a plunger fitting with a first through hole;

[0009] A connecting rod is sleeved on a shaft and can rotate around the axis of the shaft. The connecting rod includes a first connecting end and a second connecting end. The first connecting end is provided with a support roller for contacting the cam, and the second connecting end is provided with a second through hole.

[0010] The connecting assembly includes a first bearing assembled in a first through hole, a second bearing assembled in a second through hole, and a transmission assembly connecting the first bearing and the second bearing. The transmission assembly has a receiving cavity for receiving a first lubricating grease to lubricate the first bearing and the second bearing.

[0011] In one possible implementation, the transmission assembly includes:

[0012] The front connecting piece is attached to the front end of the inner ring of the first bearing and the front end of the inner ring of the second bearing. The front connecting piece is provided with a third through hole corresponding to the first bearing and a fourth through hole corresponding to the second bearing.

[0013] The rear connecting piece fits into the front end of the inner ring of the first bearing and the rear end of the inner ring of the second bearing. The rear connecting piece is provided with a fifth through hole corresponding to the first bearing and a sixth through hole corresponding to the second bearing.

[0014] The first pin includes a first abutting end and a first fixed end. The first fixed end passes through the third through hole, the inner ring of the first bearing, and the fifth through hole and is then fixed, so that the first abutting end abuts against the front connecting piece, which is used to restrict the front connecting piece and the rear connecting piece from disengaging from the first bearing.

[0015] The second pin includes a second abutting end and a second fixed end. The second fixed end passes through the fourth through hole, the inner ring of the second bearing, and the sixth through hole and is then fixed, so that the second abutting end abuts against the front connecting piece, which is used to prevent the front connecting piece and the rear connecting piece from disengaging from the second bearing.

[0016] In one possible implementation, the end plane of the outer ring of the first bearing is flush with the end plane of the first through hole, and the end plane of the inner ring of the first bearing protrudes beyond the end plane of the outer ring of the first bearing, so that the front connecting piece and the rear connecting piece both form a first gap with the end plane of the first through hole.

[0017] In one possible implementation, the end plane of the outer ring of the second bearing is flush with the end plane of the second through hole, and the end plane of the inner ring of the second bearing protrudes beyond the end plane of the outer ring of the second bearing, so that the front connecting piece and the rear connecting piece both form a second gap with the end plane of the second through hole.

[0018] In one possible implementation, a first oil seal ring is fitted around the outer periphery of the front connecting piece, and a second oil seal ring is fitted around the outer periphery of the rear connecting piece. The first oil seal ring has a first sealing portion at one end facing the second oil seal ring, and the second oil seal ring has a second sealing portion at one end facing the first oil seal ring. The first sealing portion fits against the front end plane of the first through hole, and the second sealing portion fits against the rear end plane of the first through hole, for sealing a first gap to form a partial receiving cavity. The first sealing portion fits against the front end plane of the second through hole, and the second sealing portion fits against the rear end plane of the second through hole, for sealing a second gap to form a partial receiving cavity.

[0019] In one possible implementation, the edge of the front connecting piece opposite to the rear connecting piece extends in a direction opposite to the rear connecting piece to form a first extension, the first extension being used to have an interference fit with the first oil seal ring.

[0020] The rear connecting piece extends from one end of the front connecting piece in a direction away from the front connecting piece to form a second extension, which is used to interfere with the second oil seal ring.

[0021] In one possible implementation, the edges of the front connecting piece and the rear connecting piece at their opposite ends are provided with bevels, so that the edges of the front connecting piece and the rear connecting piece are both tapered structures.

[0022] In one possible implementation, the first connecting end is provided with a chamber for receiving a second grease, so that the circumferential surface of the support roller rotates into the chamber to contact the second grease for lubrication.

[0023] In one possible implementation, a first fixing member is sleeved on the first fixing end, the first fixing member being used to fix the first pin relative to the inner ring of the first bearing, and a second fixing member is sleeved on the second fixing end, the second fixing member being used to fix the second pin relative to the inner ring of the second bearing.

[0024] Based on the above, this application also provides a water jet loom, including a self-lubricating water pump drive device for the water jet loom.

[0025] Compared with the prior art, the technical solution provided by this utility model has at least the following beneficial effects: the cam can rotate around the axis of the drive shaft, the first connecting end of the connecting rod is provided with a support roller, the cam can contact the support roller to drive the connecting rod to periodically swing around the axis of the shaft, and then drive the plunger joint of the water pump to periodically swing through the transmission component of the connecting component, and lubricate the first bearing assembled on the plunger joint and the second bearing assembled on the connecting rod through the first grease. The transmission component is also provided with a receiving cavity for accommodating the first grease, which can effectively improve the phenomenon of the first grease splashing under periodic vibration and effectively reduce the pollution caused by the splashing of the first grease. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of the self-lubricating water pump drive device for a water jet loom provided in an embodiment of this utility model;

[0028] Figure 2 This is a partial sectional view of the self-lubricating water pump drive device for a water jet loom provided in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Sectional view along the middle AA;

[0030] Figure 4 for Figure 2 A cross-sectional view along the middle BB.

[0031] in:

[0032] 100 - Cam, 110 - Drive shaft;

[0033] 200 - Water pump; 210 - Plunger fitting;

[0034] 300 - connecting rod, 310 - shaft, 320 - support roller;

[0035] 410-First bearing, 411-First inlet, 420-Second bearing, 421-Second inlet, 430-Front connecting piece, 431-First extension, 440-Rear connecting piece, 441-Second extension, 450-First oil seal ring, 451-First sealing part, 460-Second oil seal ring, 461-Second sealing part;

[0036] 500 - First Lubricating Grease;

[0037] 600 - First pin, 610 - First abutting end, 620 - First fixed end, 630 - First fixing component;

[0038] 700 - Second pin, 710 - Second abutment end, 720 - Second fixed end, 730 - Second fixing component;

[0039] 800 - Second grease. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] 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.

[0042] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0043] The purpose of this invention is to provide a self-lubricating water pump drive device for a water jet loom and a water jet loom, which can effectively improve the phenomenon of lubricating oil splashing under periodic vibration, based on the bearing between the lubricating connecting rod and the plunger joint.

[0044] Please see Figure 1 , Figure 3 and Figure 4 To achieve the above objectives, this utility model provides a self-lubricating water pump drive device for a water jet loom, including a cam 100, a water pump 200, a connecting rod 300, and a connecting assembly. The cam 100 is sleeved on a drive shaft 110 and can rotate around the axis of the drive shaft 110. The drive shaft 110 can be connected to the output end of a power source, which can be, but is not limited to, an electric motor. The power source drives the cam 100 to rotate periodically. The water pump 200 includes a plunger joint 210 with a first through hole. The connecting rod 300 is sleeved on the shaft 310 and can rotate around the axis of the shaft 310. The connecting rod 300 rotates and includes a first connecting end and a second connecting end. The connecting rod 300 has an overall “7” shaped structure. The first connecting end is provided with a support roller 320 for contacting the cam 100, and the second connecting end is provided with a second through hole. The connecting assembly includes a first bearing 410 assembled in the first through hole, a second bearing 420 assembled in the second through hole, and a transmission assembly connected to the first bearing 410 and the second bearing 420. The transmission assembly is provided with a receiving cavity for receiving a first grease 500 to lubricate the first bearing 410 and the second bearing 420.

[0045] It is understood that the first bearing 410 includes an inner ring and an outer ring that can rotate relative to each other. The outer ring of the first bearing 410 is fitted with the inner wall of the first through hole. This connection method can be, but is not limited to, an interference fit. Similarly, the second bearing 420 includes an inner ring and an outer ring that can rotate relative to each other. The outer ring of the second bearing 420 is fitted with the inner wall of the second through hole. This connection method can be, but is not limited to, an interference fit. The transmission assembly is connected to the inner ring of the first bearing 410 and the inner ring of the second bearing 420. When the second connecting end rotates around the axis of the shaft 310, it drives the first bearing 410 to move while simultaneously pulling the second bearing 420 through the transmission assembly, thereby causing the plunger joint 210 to move.

[0046] Specifically, the cam 100 can rotate around the axis of the drive shaft 110, and the first connecting end of the connecting rod 300 is provided with a support roller 320. The cam 100 can contact the support roller 320 to drive the connecting rod 300 to oscillate periodically around the axis of the shaft 310. In turn, the transmission component of the connecting assembly drives the plunger joint 210 of the water pump 200 to oscillate periodically. The first grease 500 is used to lubricate the first bearing 410 assembled on the plunger joint 210 and the second bearing 420 assembled on the connecting rod 300. The transmission component is also provided with a receiving cavity for accommodating the first grease 500 to store the first grease 500. This can effectively improve the phenomenon of the first grease 500 splashing under periodic vibration and effectively reduce the pollution caused by the splashing of the first grease 500.

[0047] In one possible implementation, the transmission assembly includes a front connecting piece 430, a rear connecting piece 440, a first pin 600, and a second pin 700. The front connecting piece 430 and the rear connecting piece 440 have a plate structure, with planar areas on both their front and rear sides. The rear planar area of ​​the front connecting piece 430 is attached to the front end of the inner ring of the first bearing 410 and the front end of the inner ring of the second bearing 420. The front planar area of ​​the rear connecting piece 440 is attached to the front end of the inner ring of the first bearing 410 and the rear end of the inner ring of the second bearing 420. That is, the front connecting piece 430... The front connecting piece 430 and the rear connecting piece 440 clamp the inner ring of the first bearing 410 and the inner ring of the second bearing 420 in the front-rear direction. The front connecting piece 430 is provided with a third through hole corresponding to the first bearing 410 and a fourth through hole corresponding to the second bearing 420. The rear connecting piece 440 is provided with a fifth through hole corresponding to the first bearing 410 and a sixth through hole corresponding to the second bearing 420. The third and fifth through holes can be round holes with a cross-sectional diameter consistent with the inner diameter of the inner ring of the first bearing 410, and the fourth and sixth through holes can be round holes with a cross-sectional diameter consistent with the inner diameter of the inner ring of the second bearing 420.

[0048] The first pin 600 includes a first abutting end 610 and a first fixed end 620. The cross-sectional diameter of the first abutting end 610 is larger than the inner diameter of the inner ring of the first bearing 410, and the cross-sectional diameter of the first fixed end 620 is less than or equal to the inner diameter of the inner ring of the first bearing 410. The first fixed end 620 passes through the third through hole, the inner ring of the first bearing 410, and the fifth through hole and is then fixed, so that the first abutting end 610 abuts against the front connecting piece 430, which is used to restrict the front connecting piece 430 and the rear connecting piece 440 from disengaging from the first bearing 410. This disengagement means that the front connecting piece 430 and the rear connecting piece 440 change from a contact state to a separation state with the first bearing 410. The second pin 700 includes a second abutting end 710 and a second fixed end 720. The cross-sectional diameter of the second abutting end 710 is greater than the inner diameter of the inner ring of the second bearing 420, and the cross-sectional diameter of the second fixed end 720 is less than or equal to the inner diameter of the inner ring of the second bearing 420. The second fixed end 720 passes through the fourth through hole, the inner ring of the second bearing 420, and the sixth through hole and is then fixed, so that the second abutting end 710 abuts against the front connecting piece 430, which is used to restrict the front connecting piece 430 and the rear connecting piece 440 from disengaging from the second bearing 420. This disengagement means that the front connecting piece 430 and the rear connecting piece 440 change from a contact state to a separation state with the second bearing 420.

[0049] It should be noted that the first fixing end 620 is detachably fitted with the first fixing member 630 after passing through the fifth through hole. The first fixing end 620 is provided with external thread, and the first fixing member 630 is a nut adapted to the external thread. The threaded connection between the first fixing member 630 and the first fixing end 620 is used to fix the first pin 600 relative to the inner ring of the first bearing 410. The second fixing end 720 is detachably fitted with the second fixing member 730 after passing through the sixth through hole. The second fixing end 720 is provided with external thread, and the second fixing member 730 is a nut adapted to the external thread. The threaded connection between the second fixing member 730 and the second fixing end 720 is used to fix the second pin 700 relative to the inner ring of the second bearing 420.

[0050] In one possible implementation, the end plane of the outer ring of the first bearing 410 is flush with the end plane of the first through hole, the length of the inner ring of the first bearing 410 in its own axial direction is greater than the length of the outer ring of the first bearing 410 in its own axial direction, and the end plane of the inner ring of the first bearing 410 protrudes beyond the end plane of the outer ring of the first bearing 410, so that the front connecting piece 430 and the rear connecting piece 440 both form a first gap with the end plane of the first through hole; the end plane of the outer ring of the second bearing 420 is flush with the end plane of the second through hole, the length of the inner ring of the second bearing 420 in its own axial direction is greater than the length of the outer ring of the second bearing 420 in its own axial direction, and the end plane of the inner ring of the second bearing 420 protrudes beyond the end plane of the outer ring of the second bearing 420, so that the front connecting piece 430 and the rear connecting piece 440 both form a second gap with the end plane of the second through hole.

[0051] A first oil seal ring 450 is fitted around the outer periphery of the front connecting piece 430, and a second oil seal ring 460 is fitted around the outer periphery of the rear connecting piece 440. The first oil seal ring 450 has a first sealing portion 451 at one end facing the second oil seal ring 460, and the second oil seal ring 460 has a second sealing portion 461 at one end facing the first oil seal ring 450. The edge of the front connecting piece 430 away from the rear connecting piece 440 extends in a direction away from the rear connecting piece 440 to form a first extension portion 431. The first extension portion 431 and the circumferential wall of the front connecting piece 430 are used for an interference fit with the first oil seal ring 450. The edge of the rear connecting piece 440 away from the front connecting piece 430 extends in a direction away from the front connecting piece 430 to form a second extension portion 441. The second extension portion 441 and the circumferential wall of the rear connecting piece 440 are used for an interference fit with the second oil seal ring 460.

[0052] Furthermore, both the first oil seal ring 450 and the second oil seal ring 460 are made of elastic material. The width of the first oil seal ring 450 in the axial direction of the first bearing 410 is greater than the distance between the end of the first oil seal ring 450 facing away from the first through hole and the front end plane of the first through hole. The width of the second oil seal ring 460 in the axial direction of the first bearing 410 is greater than the distance between the end of the second oil seal ring 460 facing away from the first through hole and the rear end plane of the first through hole. This ensures that the first sealing part 451 is pressed to fit against the front end plane of the first through hole, and the second sealing part 461 is pressed to fit against the rear end plane of the first through hole, thereby sealing the first gap to form a partial receiving cavity. This partial receiving cavity is used to store the first lubricant. Grease 500 is used to lubricate the first bearing 410. Similarly, the width of the first oil seal ring 450 in the axial direction of the second bearing 420 is greater than the distance between the end of the first oil seal ring 450 facing away from the second through hole and the front end plane of the second through hole. The width of the second oil seal ring 460 in the axial direction of the second bearing 420 is greater than the distance between the end of the second oil seal ring 460 facing away from the second through hole and the rear end plane of the second through hole. This ensures that the first sealing part 451 is pressed to fit against the front end plane of the second through hole, and the second sealing part 461 is pressed to fit against the rear end plane of the second through hole, sealing a portion of the second interval to form a partial receiving cavity. This partial receiving cavity is used to store the first grease 500 to lubricate the second bearing 420. Furthermore, the sealing of the first and second intervals by the first sealing part 451 and the second sealing part 461 effectively reduces contamination caused by the splashing of the first grease 500. The first grease 500 in the first bearing 410 can be discharged along the unblocked first gap, and the first grease 500 in the second bearing 420 can be discharged along the unblocked second gap. An oil film can be formed at the unblocked first gap and the unblocked second gap. The unblocked first gap and the unblocked second gap are located at the end of the connecting rod 300 and the plunger joint 210. The plunger joint 210 is also provided with a first inlet 411 for the first grease 500 to enter the first bearing 410, and the connecting rod 300 is also provided with a second inlet 421 for the first grease 500 to enter the second bearing 420 for replenishment of the first grease 500.

[0053] Furthermore, the opposing ends of the first sealing part 451 and the second sealing part 461 are gradually thinning structures, that is, the rear end of the first sealing part 451 gradually thins towards the second sealing part 461, and the front end of the second sealing part 461 gradually thins towards the first sealing part 451, so as to facilitate the deformation of the first sealing part 451 and the second sealing part 461 and effectively ensure the sealing effect of the first sealing part 451 and the second sealing part 461. The edges of the opposing ends of the front connecting piece 430 and the rear connecting piece 440 are provided with bevels so that the edges of the front connecting piece 430 and the rear connecting piece 440 are both gradually thinning structures. The setting of the bevel can increase the space of the receiving cavity, thereby effectively increasing the amount of first grease 500 that can be contained.

[0054] Please see Figure 2 In one possible implementation, the circumferential sidewall of the cam 100 contacts the circumferential surface of the support roller 320. The first connecting end has a chamber for accommodating the second grease 800, allowing the circumferential surface of the support roller 320 to rotate into the chamber and contact the second grease 800 for lubrication. This eliminates the need for periodic lubrication, reduces contamination caused by grease splashing, and features a simple, stable structure with high cost-effectiveness. It also avoids the problem of contamination caused by easily damaged flexible oil supply pipes in existing technologies. The first grease 500 and the second grease 800 can use the same grease material, such as soap-based grease, non-based grease, or organic grease. Alternatively, different grease materials can be used for the first grease 500 and the second grease 800 depending on actual needs, as long as the above objectives are achieved.

[0055] Based on the above, this application also provides a water jet loom, including a self-lubricating water pump 200 drive device for the water jet loom, which also has all the beneficial effects of the self-lubricating water pump 200 drive device for the water jet loom. The remaining structure of the water jet loom can be referred to the prior art, and will not be described in detail here.

[0056] 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.

[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0058] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A self-lubricating water pump drive device for a water jet loom, characterized in that, include: A cam (100) is fitted onto a drive shaft (110) and is rotatable about the axis of the drive shaft (110); The water pump (200) includes a plunger fitting (210) having a first through hole; A connecting rod (300) is sleeved on a shaft (310) and can rotate about the axis of the shaft (310). The connecting rod (300) includes a first connecting end and a second connecting end. The first connecting end is provided with a support roller (320) for contacting the cam (100), and the second connecting end is provided with a second through hole. The connecting assembly includes a first bearing (410) fitted in the first through hole, a second bearing (420) fitted in the second through hole, and a transmission assembly connecting the first bearing (410) and the second bearing (420). The transmission assembly is provided with a receiving cavity for receiving a first grease (500) to lubricate the first bearing (410) and the second bearing (420).

2. The self-lubricating water pump drive device for a water-jet loom according to claim 1, characterized in that, The transmission assembly includes: The front connecting piece (430) is attached to the front end of the inner ring of the first bearing (410) and the front end of the inner ring of the second bearing (420). The front connecting piece (430) is provided with a third through hole corresponding to the first bearing (410) and a fourth through hole corresponding to the second bearing (420). The rear connecting piece (440) is attached to the front end of the inner ring of the first bearing (410) and the rear end of the inner ring of the second bearing (420). The rear connecting piece (440) is provided with a fifth through hole corresponding to the first bearing (410) and a sixth through hole corresponding to the second bearing (420). The first pin (600) includes a first abutting end (610) and a first fixing end (620). The first fixing end (620) passes through the third through hole, the inner ring of the first bearing (410), and the fifth through hole and is then fixed, so that the first abutting end (610) abuts against the front connecting piece (430) to restrict the front connecting piece (430) and the rear connecting piece (440) from disengaging from the first bearing (410). The second pin (700) includes a second abutting end (710) and a second fixed end (720). The second fixed end (720) passes through the fourth through hole, the inner ring of the second bearing (420), and the sixth through hole and is then fixed, so that the second abutting end (710) abuts against the front connecting piece (430) to restrict the front connecting piece (430) and the rear connecting piece (440) from disengaging from the second bearing (420).

3. The self-lubricating water pump drive device for a water jet loom according to claim 2, characterized in that, The end plane of the outer ring of the first bearing (410) is flush with the end plane of the first through hole, and the end plane of the inner ring of the first bearing (410) protrudes from the end plane of the outer ring of the first bearing (410), so that the front connecting piece (430) and the rear connecting piece (440) both form a first gap with the end plane of the first through hole.

4. The self-lubricating water pump drive device for a water jet loom according to claim 3, characterized in that, The end plane of the outer ring of the second bearing (420) is flush with the end plane of the second through hole, and the end plane of the inner ring of the second bearing (420) protrudes from the end plane of the outer ring of the second bearing (420), so that the front connecting piece (430) and the rear connecting piece (440) both form a second gap with the end plane of the second through hole.

5. The self-lubricating water pump drive device for a water jet loom according to claim 4, characterized in that, The outer periphery of the front connecting piece (430) is fitted with a first oil seal ring (450), and the outer periphery of the rear connecting piece (440) is fitted with a second oil seal ring (460). The first oil seal ring (450) has a first sealing part (451) at one end facing the second oil seal ring (460), and the second oil seal ring (460) has a second sealing part (461) at one end facing the first oil seal ring (450). The first sealing part (451) is fitted with the front end plane of the first through hole, and the second sealing part (461) is fitted with the rear end plane of the first through hole, for sealing part of the first interval to form part of the receiving cavity. The first sealing part (451) is fitted with the front end plane of the second through hole, and the second sealing part (461) is fitted with the rear end plane of the second through hole, for sealing part of the second interval to form part of the receiving cavity.

6. The self-lubricating water pump drive device for a water jet loom according to claim 5, characterized in that, The front connecting piece (430) extends one end edge away from the rear connecting piece (440) in a direction away from the rear connecting piece (440) to form a first extension (431), the first extension (431) being used for an interference fit with the first oil seal ring (450). The rear connecting piece (440) extends from one end edge away from the front connecting piece (430) in a direction away from the front connecting piece (430) to form a second extension (441), the second extension (441) being used for an interference fit with the second oil seal ring (460).

7. The self-lubricating water pump drive device for a water jet loom according to any one of claims 2-6, characterized in that, The edges of the front connecting piece (430) and the rear connecting piece (440) facing each other are provided with bevels so that the edges of the front connecting piece (430) and the rear connecting piece (440) are both tapered structures.

8. The self-lubricating water pump drive device for a water jet loom according to any one of claims 1-6, characterized in that, The first connecting end is provided with a chamber for accommodating the second grease (800) so that the circumferential surface of the support roller (320) can rotate into the chamber to contact the second grease (800) for lubrication.

9. The self-lubricating water pump drive device for a water-jet loom according to any one of claims 2-6, characterized in that, The first fixed end (620) is fitted with a first fixing member (630), which is used to fix the first pin (600) relative to the inner ring of the first bearing (410). The second fixed end (720) is fitted with a second fixing member (730), which is used to fix the second pin (700) relative to the inner ring of the second bearing (420).

10. A water-jet loom, characterized in that, Includes the self-lubricating water pump drive device for water jet looms as described in any one of claims 1-9.

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