A crankshaft transmission device capable of effectively improving lubrication reliability

Abstract

A kind of crankshaft transmission device capable of effectively improving lubrication reliability, it is characterized by: it includes by no inner ring bearing transmission mechanism, lubrication module;The no inner ring bearing transmission mechanism includes the crankshaft by no inner ring bearing is worn in connecting rod axle hole, and the detachable bearing cover encapsulated in the both ends of connecting rod axle hole by connecting piece, and by the bearing cavity encapsulated in bearing cover Form closed lubrication cavity;The crankshaft both ends are placed on the support seat of left and right side, and respectively with counterweight module is installed in the both ends of crankshaft;The lubrication module includes the oil distributor connected with lubricating oil source fixedly installed on connecting rod (and reciprocating motion with connecting rod), and the left and right pressure maintaining valve connected with oil distributor by left and right oil pipe, left and right pressure maintaining valve is respectively fixedly installed on the bearing cover of corresponding side, oil supply port is communicated with lubrication cavity.

Description

Technical Field

[0001] This invention relates to a crankshaft transmission device in a needle punching machine in a needle punching nonwoven fabric production line, specifically a crankshaft transmission device consisting of an inner ring bearing transmission mechanism and a lubrication module that enables the needle to reciprocate through a loose fiber web. Background Technology

[0002] The needle punching machine is a key piece of equipment in the needle-punched nonwoven fabric production line. Its basic principle is to repeatedly puncture the loose fiber web with thousands of needles with triangular (or other shapes) cross-sections and hooked edges, causing the fibers in the web to entangle with each other, thereby forming a needle-punched nonwoven material with a certain strength and thickness.

[0003] The crankshaft transmission device is the core drive device of the acupuncture machine. In order to save energy, reduce consumption and improve production efficiency, the working frequency of the acupuncture machine is getting higher and higher, up to 3000 times / min. The requirements for the machining accuracy, reliability, noise and vibration of the crankshaft transmission device are getting higher and higher.

[0004] Traditional crankshaft transmission devices generally use bearings with inner rings. However, the installation of bearings with inner rings is usually done by heat mounting, which makes disassembly and maintenance difficult later. During use, the addition of the bearing inner ring transition between the bearing and the shaft leads to high noise, and the bearing is prone to overheating and shortening its lifespan.

[0005] Traditional lubrication methods for crankshaft transmission devices typically involve directly pumping lubricating oil to the bearings. However, due to the harsh operating conditions of needle punching machines, which are usually around 2000 times per minute and have greater vibrations than ordinary equipment, issues such as loosening, detachment, cracking, or aging of oil pipes can occur. Existing lubrication methods cannot monitor whether the lubricating oil is delivered to the bearings of the crankshaft transmission device in a timely manner, which can easily lead to bearing burnout, serious equipment malfunctions, or even safety accidents. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the existing technology by providing a crankshaft transmission device that can effectively improve lubrication reliability. The device of this invention employs a bearing-less transmission mechanism, which is easy to disassemble and maintain, operates smoothly, has low friction, and low noise. Furthermore, it utilizes new lubrication technology to ensure adequate bearing lubrication, constantly monitoring whether the bearing lubricant dosage is sufficient and whether there are leaks in the lubrication lines, thus ensuring the safe and stable operation of the crankshaft device.

[0007] The objective of this invention can be achieved through the following technical measures: The crankshaft transmission device of the present invention, which can effectively improve lubrication reliability, includes a transmission mechanism without an inner ring bearing and a lubrication module. The transmission mechanism without an inner ring bearing includes a crankshaft that is mounted in the connecting rod shaft hole through the bearing without an inner ring bearing, and detachable bearing caps that are encapsulated at both ends of the connecting rod shaft hole by connecting parts, and a lubrication cavity formed by bearing cavities encapsulated in the bearing caps. The crankshaft is mounted on support seats on the left and right sides at both ends, and counterweight modules are respectively installed at both ends of the crankshaft (their function is mainly to counteract the inertial force generated during the conversion of the crankshaft's rotational motion to reciprocating motion, thereby maintaining the smooth operation of the crankshaft transmission device). The lubrication module includes an oil distributor that is fixedly mounted on the connecting rod and reciprocates with the connecting rod and is connected to the lubricating oil source, and left and right pressure holding valves that are connected to the oil distributor through left and right oil supply pipes. The left and right pressure holding valves are respectively fixedly mounted on the bearing caps on the corresponding sides, and the lubricating oil communicates with the lubrication cavity through the oil supply holes of the pressure holding valves and the oil passage holes on the bearing caps.

[0008] More specifically, a groove is provided on the cylindrical surface around the eccentric position in the middle of the crankshaft to cooperate with the roller without an inner ring bearing. The roller without an inner ring bearing is placed in the groove and used as the inner ring raceway of the inner ring bearing without an inner ring bearing. The crankshaft is subjected to overall quenching and tempering treatment. The cylindrical surface of the groove at the eccentric position and the left and right end faces are subjected to carburizing and quenching treatment, with a surface hardness of 58-62 HRC.

[0009] The pressure maintaining valve of this invention comprises a valve body, a cylindrical cavity of which is provided with a main lubrication channel and a bypass channel. A steel ball and a compression spring are sequentially arranged in the main lubrication channel. A threaded sleeve (clockwise or counterclockwise screwing allows for adjustment of the required pressure of the compression spring) is screwed onto the port of the main lubrication channel via internal and external threads. A locking nut, also screwed onto the end of the threaded sleeve via internal and external threads, allows for adjustment of the required pressure of the compression spring by adjusting the threaded sleeve. The locking nut then secures the screw... The sleeve is radially locked to ensure that the compression spring does not move radially when compressed. When lubricating oil needs to be replenished, the lubricating oil enters the main lubrication channel of the pressure holding valve from the lubricating oil source through the pressure switch, oil distributor, and oil supply pipe. When the lubricating oil supply pressure rises sufficiently to overcome the elastic force of the compression spring in the pressure holding valve, the steel ball moves upward, and the grease reaches the lubrication cavity through the threaded sleeve, the circular hole on the circumferential wall of the valve body, and the oil supply hole on the bearing cover, realizing the periodic and quantitative supply of lubricating oil. A plug is installed at the bypass channel port for releasing pipeline pressure during lubrication system maintenance. The inner ringless bearing described in this invention generally refers to a cylindrical roller bearing without an inner ring and with a movable and detachable end face.

[0010] The pressure holding valve must be placed at the very end of the lubrication oil circuit, fixed on the bearing cover and directly connected to the inner cavity of the bearing cover. The oil distributor is usually fixed at the end of the connecting rod. The inlet end of the oil distributor is equipped with a pressure switch for real-time monitoring of the grease pressure in the lubrication pipeline between the lubrication oil source and the pressure holding valve, ensuring timely and sufficient supply of lubricating oil to the bearing without an inner ring, and achieving good lubrication effect at this location.

[0011] The beneficial effects of this invention are as follows: 1. Because the present invention adopts a transmission mechanism without an inner ring bearing, it achieves the following beneficial effects: smooth operation, low friction, low noise, and easy disassembly and maintenance.

[0012] 2. The lubrication technology employed in this invention not only ensures sufficient lubrication of the bearings, but also monitors the bearing lubricant dosage and lubrication pipeline leakage at all times through a pressure switch, ensuring timely and sufficient supply of lubricant, ensuring the safe and stable operation of the crankshaft transmission device, improving equipment reliability, and thus greatly improving the production efficiency of enterprises. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the crankshaft transmission device of the present invention.

[0014] Figure 2 This is a schematic diagram of a transmission mechanism without an inner ring bearing.

[0015] Figure 3 This is a schematic diagram of the lubrication module.

[0016] Figure 4 This is a schematic diagram of the lubricating oil passage.

[0017] Figure 5 This is a schematic diagram illustrating the application of the present invention.

[0018] In the diagram, the numbers represent: 1-Inner ringless transmission mechanism, 2-Lubrication module, 3-Support base, 4-Counterweight module, 5-Needle beam, 6-Needle plate, 7-Needle, 8-Guide rocker arm mechanism, 11-Crankshaft, 12-Inner ringless bearing, 13-Connecting rod, 14-Bearing cap, 15-Lubrication cavity, 21-Oil distributor, 22-Oil pipe, 23-Pressure holding valve, 24-Valve body, 25-Steel ball, 26-Compression spring, 27-Threaded sleeve, 28-Locking cap, 29-Plug. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings: like Figures 1-3As shown, the crankshaft transmission device of the present invention, which can effectively improve lubrication reliability, includes a transmission mechanism 1 without an inner ring bearing and a lubrication module 2; the transmission mechanism 1 without an inner ring bearing includes a crankshaft 11 that is mounted in the shaft hole of a connecting rod 13 through an inner ring bearing 12, and a detachable bearing cover (14) encapsulated at both ends of the shaft hole of the connecting rod through a connector, and a lubrication cavity 15 formed by a bearing cavity encapsulated in the bearing cover; the crankshaft 11 is mounted on the left and right support seats 3 at both ends, and a counterweight module 4 is installed at each end of the crankshaft 11 (the counterweight module 4 is mounted on the left and right sides of the support seat 3). Its main function is to counteract the inertial force generated during the conversion of the crankshaft 11's rotary motion to reciprocating motion, thereby maintaining the smooth operation of the crankshaft transmission device. The lubrication module includes an oil distributor 21, which is fixedly installed on the connecting rod and reciprocates with the connecting rod 13 and is connected to the lubricating oil source, and left and right pressure holding valves 23, which are connected to the oil distributor through left and right oil supply pipes 22. The left and right pressure holding valves are respectively fixedly installed on the bearing caps 14 on the corresponding sides. The lubricating oil communicates with the lubrication cavity 15 through the oil supply hole on the pressure holding valve 23 and the oil passage hole on the bearing cap.

[0020] The inner ring-less bearing 12 described in this invention refers to a cylindrical roller bearing without an inner ring and with a movable and detachable end face. More specifically (see...) Figure 2 The cylindrical surface surrounding the eccentric position of the crankshaft 11 is provided with a groove that mates with the roller of the bearing without an inner ring. The roller of the bearing without an inner ring 12 is placed in the groove and used as the inner ring raceway of the bearing without an inner ring 12. The crankshaft 1 is subjected to overall quenching and tempering treatment. The cylindrical surface of the groove at the eccentric position and the left and right end faces are subjected to carburizing and quenching treatment, with a surface hardness of 58-62 HRC.

[0021] The pressure maintaining valve 23 of this invention includes a valve body 24. The cylindrical cavity of the valve body has a main lubrication channel and a bypass channel. In the main lubrication channel, a steel ball 25 and a compression spring 26 are sequentially arranged. A threaded sleeve 27, screwed onto the port of the main lubrication channel via internal and external threads, is used to adjust the pressure required by the compression spring 26 (clockwise or counterclockwise screwing allows adjustment of the pressure required by the compression spring 26). A locking cap 28, screwed onto the end of the threaded sleeve via internal and external threads, allows adjustment of the pressure required by the compression spring 26. After adjusting the threaded sleeve to adjust the pressure required by the compression spring 26, the locking cap 28 radially locks the threaded sleeve 27, ensuring that the compression spring 26 does not move radially when compressed. When lubricating oil needs to be added... Lubricating oil enters the main lubrication channel of pressure holding valve 23 after passing through the oil pressure switch, oil distributor 21, and oil supply pipe 22 from the lubrication oil source. When the lubricating oil supply pressure rises sufficiently to overcome the elastic force of the pressure spring 26 in pressure holding valve 23, the steel ball 25 moves upward, and the lubricating oil reaches the lubrication cavity 15 through the threaded sleeve 27, the oil supply hole on the circumferential wall of valve body 24, and the oil passage hole on bearing cover 14. If there is leakage or loosening in the lubrication pipeline, the pressure switch will fail and cannot work properly, and will feed back to the equipment control system for timely maintenance, thereby realizing the monitoring of lubrication system faults and ensuring the regular and quantitative supply of lubricating oil; a plug 29 for releasing pipeline pressure during lubrication system maintenance is installed at the bypass channel port (see Figure 3 , Figure 4 ).

[0022] The pressure holding valve 23 must be placed at the very end of the lubrication oil circuit, fixed on the bearing cover 14 and directly connected to the inner cavity of the bearing cover. The oil distributor 21 is usually fixed at the end of the connecting rod 13. The inlet end of the oil distributor 21 is equipped with a pressure switch for real-time monitoring of the grease pressure in the lubrication pipeline between the lubrication oil source and the pressure holding valve 23, to ensure timely and sufficient supply of lubricating oil to the bearing 12 without an inner ring, and to achieve good lubrication effect at this location.

[0023] like Figure 5 As shown, the crankshaft transmission device 9 is symmetrically distributed above the needle beam 5, and the rocker arm guide mechanism 8 is symmetrically distributed on both sides of the needle beam. During operation, the crankshaft 11 of the crankshaft transmission device rotates at the same speed but in opposite directions under the drive of the electric motor. Guided by the rocker arm guide mechanism 8, it drives the needle beam 5, needle plate 6, and needles 7 to reciprocate up and down. The reciprocating motion of the needles repeatedly punctures the loose fiber web, causing the fibers in the fiber web to entangle with each other, thereby forming a needle-punched nonwoven material with a certain strength and thickness.

Claims

1. A crankshaft transmission device that can effectively improve lubrication reliability, characterized in that: It includes a transmission mechanism (1) without an inner ring bearing and a lubrication module (2); the transmission mechanism (1) without an inner ring bearing includes a crankshaft (11) that passes through the shaft hole of the connecting rod (13) through a bearing (12) without an inner ring bearing, and a detachable bearing cover (14) that is encapsulated at both ends of the shaft hole of the connecting rod through a connector, and a lubrication cavity (15) formed by the bearing cavity encapsulated in the bearing cover; the crankshaft (11) is mounted on the left and right support seats (3) at both ends, and a counterweight module (4) is installed at both ends of the crankshaft (11); the lubrication module (2) includes an oil distributor (21) that is fixedly installed on the connecting rod and connected to the lubricating oil source, and left and right pressure holding valves (23) that are connected to the oil distributor through left and right oil supply pipes (22). The left and right pressure holding valves are fixedly installed on the bearing cover (14) on the corresponding side, and the lubricating oil communicates with the lubrication cavity (15) through the oil supply hole on the pressure holding valve (23) and the oil passage hole on the bearing cover.

2. A crankshaft transmission device according to claim 1 that can effectively improve lubrication reliability, characterized in that: The cylindrical surface of the crankshaft (11) at the eccentric position in the middle is provided with a groove that mates with the roller of the bearing without an inner ring. The roller of the bearing without an inner ring (12) is placed in the groove and used as the inner ring raceway of the bearing without an inner ring (12). The crankshaft (11) is subjected to overall quenching and tempering treatment. The cylindrical surface of the groove at the eccentric position and the left and right end faces are subjected to carburizing and quenching treatment, with a surface hardness of 58 to 62 HRC.

3. A crankshaft transmission device according to claim 1 that can effectively improve lubrication reliability, characterized in that: The pressure holding valve (23) includes a valve body (24), inside which a main lubrication channel and a bypass channel are provided. In the main lubrication channel, a steel ball (25) and a compression spring (26) are arranged in sequence. A threaded sleeve (27) for adjusting the required pressure of the compression spring is screwed onto the port of the main lubrication channel by means of internal and external thread, and a locking cap (28) for screwing onto the end of the threaded sleeve by means of internal and external thread. After adjusting the required pressure of the compression spring (26) by adjusting the threaded sleeve, the locking cap (28) is used to radially lock the threaded sleeve (27) to ensure that the compression spring (26) does not move radially when it is compressed. A plug (29) for releasing pipeline pressure during lubrication system maintenance is installed at the port of the bypass channel.

4. A crankshaft transmission device according to claim 1 that can effectively improve lubrication reliability, characterized in that: The inlet end of the oil separator (21) is equipped with a pressure switch for real-time monitoring of the grease pressure in the lubrication pipeline between the lubricating oil source and the pressure holding valve (23).

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