A self-lubricating ball screw system

Abstract

The present invention discloses a self-lubricating ball screw system, comprising a screw and balls, characterized in that it also comprises a nut cooperating with the screw, comprising a counting inverter and a lubrication inverter cooperating with the nut, the nut being fixed on a nut seat, and a self-lubricating system being installed on the nut seat. The self-lubricating system comprises a counting system and a lubrication system, and the counting system utilizes a guide rod-ratchet mechanism to convert the circulating motion of the balls to control the operation of the lubrication system. A ratchet and a gear reduction group are installed in the counting system, and the transmission ratio of the gear reduction group can be controlled to meet the requirements for the lubrication quality of the ball screw pair under different working conditions. In response to the deficiencies of the prior art, the present invention provides a ball screw system that can achieve self-lubrication, reduces the labor intensity of detecting the lubrication condition of the screw, and improves the lubrication quality of the ball screw.

Description

Technical Field

[0001] The present invention relates to the technical field of ball screws, in particular to a self-lubricating ball screw system. Background Art

[0002] As CNC machine tools continue to develop towards heavy load, high speed and high precision, ball screw pairs are most widely used in this field. Ball screw transmission mechanisms are the most commonly used transmission components in precision machinery and tool machinery. They can realize the transformation of motion from rotational motion to linear motion, or the transformation of torque to axial reciprocating force, and have the characteristics of high precision, high efficiency and reversibility.

[0003] However, when ball screw lubrication performance decreases, friction can lead to adverse consequences such as increased temperature, contact wear, and screw damage, impacting the operation of precision machinery. When lubricant demand is high, manual inspection and replenishment are required, resulting in high labor costs and cumbersome procedures. To address these issues, the present invention proposes a self-lubricating ball screw. Summary of the Invention

[0004] (1) Technical problems solved

[0005] The present invention proposes a self-lubricating ball screw, which effectively solves the current problem of manual inspection of lubrication effect, reduces the tedious steps in mechanical lubrication maintenance, reduces workers' labor intensity, ensures the lubrication effect of the ball screw, and improves the operation quality of the ball screw mechanism.

[0006] (2) Technical solution

[0007] The present invention is implemented through the following technical solution: a self-lubricating ball screw system, including a screw rod and a ball, characterized in that it also includes a nut that cooperates with the screw rod, and also includes a counting inverter and a lubrication inverter that cooperate with the nut. The nut is fixed on a nut seat, and a self-lubricating system is also installed on the nut seat.

[0008] The self-lubricating system includes a counting system, a lubrication system and a self-lubricating system box. The counting system and the lubrication system are installed inside the self-lubricating system box. The counting system includes a guide rod and a return spring, and is characterized in that it also includes a movable hinge, a lever, a movable slider, a connecting rod, a shift rod, a pawl, and a ratchet connected in sequence with the guide rod. The ratchet is installed at one end of the stepped shaft, and a small gear is installed at the other end of the stepped shaft. The small gear is engaged with the input gear of the reduction gear set, and the output gear of the reduction gear set is engaged with the large gear. The large gear is connected to one end of the output shaft through a key, and the other end of the output shaft is connected to the cam; the lubrication system includes an electromagnet switch, an electromagnetic oil dripper, an oil dripping one-way valve, an oil suction one-way valve, an oil guide pipe, an oil tank, a floating cursor, and an oil tank indicator light.

[0009] Preferably, the guide rod extends out of the fuel tank and contacts the ball. The ball touches the guide rod and moves upward, causing the cam to rotate a certain angle.

[0010] Preferably, the cam touches the electromagnetic switch to control the electromagnetic oil dropper to drip oil. At the same time, the oil-dropping one-way valve opens; after the oil dripping is completed, the electromagnetic oil dropper resets, and at the same time, the oil-dropping one-way valve closes and the oil-sucking one-way valve opens to complete the oil suction.

[0011] Preferably, the deceleration function is achieved through a ratchet, a pinion gear, a large gear and a reduction gear set, and the ball touches the guide rod N (100 < N < 10000) times to trigger the electromagnetic oil dropper to drip oil once.

[0012] Preferably, a through hole is provided in the center of the counting inverter for the guide rod to slide in the hole.

[0013] Preferably, a through hole is provided in the center of the lubrication inverter for the oil droplets to enter the raceway.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides a self-lubricating ball screw system with the following beneficial effects:

[0016] Compared with the traditional ball screw pair, the self-lubricating ball screw of the present application can intermittently achieve automatic oil dripping lubrication while the screw rod is moving, avoiding problems such as excessive temperature rise and shortened life caused by excessive friction due to the failure to supply lubricating oil in time for the ball screw pair. A floating cursor is provided in the fuel tank, and the cursor is connected to the fuel tank indicator light. When the oil storage in the fuel tank is insufficient, the fuel tank indicator light reminds the worker to replenish the lubricating oil. Therefore, there is no need for manual inspection of the lubrication condition of the ball screw, and the lubrication quality during the operation of the screw is improved, which is more convenient. Compared with the self-lubricating screw that processes capillary holes inside the hollow screw rod and supplies oil by the inertial force generated during the operation of the motor, the self-lubricating ball screw of the present application uses the ball circulation and the reciprocating movement generated by the action on the guide rod as the power of the lubrication system. The power is determined by the rotational speed of the screw rod. Therefore, the lubrication frequency is positively correlated with the displacement of the nut, avoiding the problem of uncontrollable lubricating oil consumption due to different working conditions. Therefore, the lubrication quality of the self-lubricating ball screw of the present application is higher, and the applicable range of the ball screw is broadened. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the self-lubricating ball screw system of the present invention in the main view direction

[0018] Figure 2 It is a cross-sectional view of the self-lubricating system of the present invention in the left view direction

[0019] Figure 3 It is a cross-sectional view of the self-lubricating system of the present invention in the right view direction

[0020] Figure 4 A cross-sectional view of the self-lubricating system of the present invention in the main viewing direction

[0021] Figure 5 A top view of the self-lubricating system of the present invention

[0022] Figure 6 The main view and stereoscopic view of the gear reduction unit of the present invention

[0023] Figure 7 The three-dimensional view and cross-sectional view of the oil drip inverter and lubrication inverter of the present invention

[0024] Figure 8 A three-dimensional cross-sectional view showing the positional relationship between the nut and the inverter of the present invention

[0025] Figure 9 This is a three-dimensional structural view of the nut seat of the present invention

[0026] The following are marked in the figure:

[0027] 1-screw;

[0028] 2-nut;

[0029] 3- nut seat;

[0030] 4-Self-lubricating system, 4001-Self-lubricating system box;

[0031] 4101-guide rod, 4102-return spring, 4103-movable hinge, 4104-lever, 4105-movable slider, 4106-connecting rod, 4107-shift lever, 4108-pawl, 4109-ratchet, 4110-stepped shaft, 4111-pinion, 4112-reduction gear set, 4113-gear, 4114-output shaft, 4115-cam;

[0032] 4201-electromagnet switch, 4202-electromagnetic oil dripper, 4203-oil dripping check valve, 4204-oil suction check valve, 4205-oil guide pipe, 4206-oil tank, 4207-floating cursor, 4208-mailbox indicator light;

[0033] 5-ball;

[0034] 6-counting inverter;

[0035] 7- Lubricate the inverter; DETAILED DESCRIPTION

[0036] The specific implementation of the present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention:

[0037] See also Figure 1-9, the embodiment of the present invention provides a technical solution:

[0038] A self-lubricating ball screw system, such as Figure 1 As shown, the invention comprises a screw 1 and a ball bearing 5, a nut 2 mating with the screw 1, a counting inverter 6 and a lubrication inverter 7 mating with the nut 2, the nut 2 being fixed to a nut seat 3, which is also mounted with a self-lubricating system 4. The following will focus on the inventive aspects of the self-lubricating system 4, the counting inverter 6, and the lubrication inverter 7, and then describe the specific implementation thereof in conjunction with their structural relationships.

[0039] refer to Figures 1 to 5 The self-lubricating system 4 includes a counting system, a lubricating system and a self-lubricating system box 4001. The counting system and the lubricating system are installed inside the self-lubricating system box 4001. The counting system includes a guide rod 4101 and a return spring 4102. It is characterized in that it also includes a moving hinge 4103, a lever 4104, a moving slider 4105, a connecting rod 4106, a shifting rod 4107, a pawl 4108, and a ratchet 4109 connected in sequence to the guide rod 4101. The ratchet 4109 is installed at one end of the stepped shaft 4110, and the other end of the stepped shaft 4110 is installed. The small gear 4111 is engaged with the input gear of the reduction gear set 4112, and the output gear of the reduction gear set 4112 is engaged with the large gear 4113. The large gear 4113 is connected to one end of the output shaft 4114 through a key, and the other end of the output shaft 4114 is connected to the cam 4115; the lubrication system includes an electromagnet switch 4201, an electromagnetic oil dripper 4202, an oil dripping one-way valve 4203, an oil suction one-way valve 4204, an oil guide pipe 4205, an oil tank 4206, a floating cursor 4207, and an oil tank indicator light 4208.

[0040] The guide rod 4101 extends out of the box and contacts the ball 5. The ball 5 touches the guide rod 4101 and moves upward. As described in the above connection process, the displacement of the guide rod 4101 will eventually drive the cam 4115 to rotate. The cam 4115 touches the electromagnet switch 4201, controlling the electromagnetic oil dripper 4202 to drip oil, and at the same time, the oil dripping check valve 4203 opens; after the oil dripping is completed, the electromagnetic oil dripper 4202 is reset, and at the same time, the oil dripping check valve 4203 is closed, and the oil suction check valve 4204 is opened to complete the oil suction.

[0041] Reference Figure 6, the stepped shaft 4110 drives the small gear 4111 to rotate. The small gear 4111 meshes with the input gear of the reduction gear set 4112. The output gear of the reduction gear set 4112 meshes with the large gear 4113. The large gear 4113 drives the output shaft 4114 to rotate through key connection, reducing the output speed of the stepped shaft 4110, and enabling the ball 5 to touch the guide rod 4101 N (100 < N < 10000) times to trigger the electromagnetic oil dripper 4202 to drip oil once.

[0042] Referring to Figures 7 and 8 , a through hole is formed in the center of the counting inverter 6 to enable the guide rod 4101 to slide therein. A through hole is formed in the center of the lubrication inverter 7 to enable the oil droplets to enter the raceway.

[0043] In summary, the ball 5 circulation caused by the rotation of the screw rod 1 of the ball screw is transmitted to the guide rod 4101 for movement. This movement characteristic is related to the rotational speed of the screw rod 1. The guide rod 4101 drives the self-lubricating system 4 to operate, thereby achieving the effect of a self-lubricating ball screw.

[0044] It can be understood that many changes can be made without departing from the concept and scope of the present invention. The present invention is not limited to specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A self-lubricating ball screw system, comprising a screw (1) and a ball (5), characterized in that: It further includes a nut (2) cooperating with the screw rod (1), a counting inverter (6) and a lubrication inverter (7) cooperating with the nut (2), the nut (2) is fixed on the nut seat (3), and a self-lubricating system (4) is further installed on the nut seat (3); The self-lubricating system (4) includes a counting system, a lubrication system and a self-lubricating system box (4001). The counting system and the lubrication system are installed inside the self-lubricating system box (4001). The counting system includes a guide rod (4101) and a return spring (4102). It is characterized in that it further includes a moving hinge (4103), a lever (4104), a moving slider (4105), a connecting rod (4106), a shifting rod (4107), a pawl (4108), and a ratchet wheel (4109) which are successively connected to the guide rod (4101). The ratchet wheel (4109) is installed at one end of a stepped shaft (4110), and a small gear (4111) is installed at the other end of the stepped shaft (4110). The small gear (4111) meshes with the input gear of a reduction gear set (4112), the output gear of the reduction gear set (4112) meshes with a large gear (4113), the large gear (4113) is connected to one end of an output shaft (4114) by a key connection, and the other end of the output shaft (4114) is connected to a cam (4115); The lubrication system includes an electromagnetic switch (4201), an electromagnetic oil dropper (4202), an oil dropping check valve (4203), an oil suction check valve (4204), a guide oil pipe (4205), an oil tank (4206), a floating cursor (4207), and an oil tank indicator light (4208).

2. A self-lubricating ball screw system according to claim 1, characterized in that: The guide rod (4101) extends out of the box body and contacts the ball (5). When the ball (5) touches the guide rod (4101), the guide rod (4101) moves upward, causing the cam (4115) to rotate a certain angle.

3. A self-lubricating ball screw system according to claims 1 and 2, characterized in that: The cam (4115) touches the electromagnetic switch (4201) to control the electromagnetic oil dropper (4202) to drop oil, and at the same time the oil dropping check valve (4203) opens; after the oil dropping is completed, the electromagnetic oil dropper (4202) resets, and at the same time the oil dropping check valve (4203) closes, and the oil suction check valve (4204) opens to complete the oil suction.

4. A self-lubricating ball screw system according to claims 1, 2 and 3, characterized in that: The deceleration function is realized through the ratchet wheel (4109), the small gear (4111), the large gear (4113) and the reduction gear set (4112), and when the ball (5) touches the guide rod (4101) N (100 < N < 10000) times, the electromagnetic oil dropper (4202) drops oil once.

5. The self-lubricating ball screw system according to claim 1, characterized in that: A through hole is provided in the center of the counting inverter (6) for the guide rod (4101) to slide in the hole.

6. The self-lubricating ball screw system according to claim 1, characterized in that: A through hole is provided in the center of the lubrication inverter (7) for the oil droplets to enter the raceway.

7. The self-lubricating ball screw system according to claim 1, characterized in that: The floating cursor (4207) is used to monitor the liquid level height inside the oil tank (4206).

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