Heavy load ball screw protection device and screw protection method

Abstract

The application discloses a heavy-load ball screw protection device and a screw protection method. The device comprises a screw bearing seat and a screw nut, and further comprises: a plurality of tensioning members which are circumferentially distributed on the outer side of the screw and are installed on the screw bearing seat, and the tensioning members are selectively telescopic along the length direction of the screw; a flexible protective cover which is sleeved on the outer side of the tensioning members and has a free end away from the screw bearing seat and passing through the outer circulating ball cover of the screw nut; and an oil receiving member which is installed on the bottom of the flexible protective cover and is connected with the end of the tensioning member away from the screw bearing seat and adapted to receive lubricating oil. The device can complete the protection work of the screw, is convenient to install and maintain, and has the functions of automatic oil receiving and oil discharging.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lead screw protection, and particularly relates to a heavy load ball screw protection device and a lead screw protection method. BACKGROUND

[0002] Heavy load lead screws are applied in pure electric bending machines, such as CN219766448U. The bearing seat of the heavy load lead screw is integrally assembled with the ball screw, which is inconvenient to disassemble. The nut ball of the heavy load lead screw is externally arranged, which brings great inconvenience to the later lead screw protection.

[0003] 1. The bearing seat of the heavy load ball screw of the pure electric bending machine is assembled with special equipment, which is inconvenient to disassemble. The nut ball of the heavy load lead screw is externally arranged. A protective sleeve is arranged between the ball screw nut and the bearing seat. The installation of the traditional protective cover has no space and is easy to interfere with the external circulation ball cover on the nut.

[0004] 2. The existing ball screw cannot recover the lubricant thrown out of the lead screw due to high-speed rotation, so as to avoid the pollution of the lubricant thrown out to the equipment and the bending workpiece.

[0005] 3. The noise of the low-bottom ball screw during high-speed rotation is reduced, and the working strength of the operator is reduced. SUMMARY

[0006] In order to solve the above technical problems, the inventors adopt the following technical scheme:

[0007] The heavy load ball screw protection device comprises a lead screw bearing seat and a lead screw nut, and further comprises:

[0008] The plurality of expansion pieces are circumferentially distributed on the outer side of the lead screw, the plurality of expansion pieces are installed on the lead screw bearing seat, and the expansion pieces are selectively telescopic along the length direction of the lead screw.

[0009] The flexible protective cover is sleeved on the outer side of the expansion piece, and the end of the flexible protective cover away from the lead screw bearing seat is free to pass through the external circulation ball cover of the lead screw nut.

[0010] The oil receiving piece is installed at the bottom of the flexible protective cover, and the oil receiving piece is connected to the end of the expansion piece away from the lead screw bearing seat and is adapted to receive lubricating oil.

[0011] Preferably, the expansion piece comprises a connecting plate, a fixing rod, a spring, a telescopic rod and a connecting flange. The connecting plate is installed on the lead screw bearing seat, the fixing rod is installed on the connecting plate, the fixing rod is connected with the telescopic rod through the spring, the telescopic rod is partially exposed on the outer side of the fixing rod and is connected with the connecting flange, and the connecting flange is adapted to connect the oil receiving piece.

[0012] Preferably, the flexible protective cover is provided with a notch at the end away from the lead screw bearing seat.

[0013] Preferably, the oil receiving member comprises a plurality of circumferentially distributed oil receiving plates, each of which is provided with an inner receiving plate and an oil guide plate, and a connecting block, the inner receiving plate is mounted on the inner wall of the flexible protective cover, the oil guide plate is mounted on the oil receiving plate and located at the gap of the flexible protective cover, and the connecting block is fixedly mounted with the connecting flange via the connecting member.

[0014] Preferably, the oil receiving member is provided with an oil pumping structure and an oil level sensor, the oil level sensor is adapted to detect whether the amount of lubricating oil in the oil receiving member reaches a set amount, and the oil pumping structure is adapted to discharge the lubricating oil exceeding the set amount of lubricating oil.

[0015] Preferably, the oil pumping structure comprises a silica gel sleeve mounted on the side of the connecting flange opposite to the oil receiving member, an oil suction surface mounted in the silica gel sleeve, an oil port provided on the silica gel sleeve, and a drain pipe mounted on the silica gel sleeve at the oil port, the drain pipe is provided with a blocking member adapted to automatically close the oil port by gravity.

[0016] Preferably, a rod member one is mounted between two adjacent fixed rods, the two ends of the rod member one are connected to the end of the corresponding fixed rod away from the screw bearing seat, a rod member two is mounted between two adjacent oil receiving members, an outer expansion member is mounted between the rod member one and the rod member two, a sliding block is slidingly mounted on the outer expansion member, an oil scraping strip is mounted on the sliding block, and a jacking rod is mounted between the sliding block and the screw bearing seat.

[0017] Preferably, one end of the jacking rod is rotatably connected to the sliding block, and the other end is rotatably connected to the screw bearing seat.

[0018] Preferably, the oil scraping strip comprises a hard body and a soft body, the hard body is mounted on the sliding block, and the soft body is adapted to clean the lubricating oil on the inner wall of the flexible protective cover when the sliding block moves downward.

[0019] A screw protection method of a heavy load ball screw protection device, the steps are as follows:

[0020] Step one: install the tensioning member

[0021] A corresponding number of tensioning members are fixed on the screw bearing seat according to the shape of the screw nut, and the connecting plate is mounted on the screw bearing seat and opposite to the screw nut;

[0022] Step two: install the flexible protective cover

[0023] The flexible protective cover is sleeved on the outside of the tensioning member in the direction of the screw nut, the expanded flexible protective cover avoids the outer circulating ball cover of the screw nut, and when the synchronous wheel drives the screw to rotate, the screw nut moves up and down without friction with the flexible protective cover;

[0024] Step three: install the oil receiving member

[0025] The oil level sensor is installed on the connecting flange, the inner joint plate of the oil receiving plate is inserted into the inner wall of the flexible protective cover and is attached, the connecting block and the corresponding connecting flange are connected through the connecting piece, the connecting flange is arranged in sliding mode relative to the connecting block, and meanwhile, the connecting piece is suitable for limiting the maximum distance between the connecting flange and the connecting block, the maximum distance is greater than the silica gel sleeve in a natural state, and the oil absorption cotton inside the silica gel sleeve can absorb the lubricating oil in the oil receiving plate;

[0026] Step four: oil receiving

[0027] When the lead screw rotates at high speed, the lubricating oil in the flow channel is thrown away from the lead screw along with the high-speed rotation of the lead screw, is hung on the inner wall of the flexible protective cover and flows downward, and finally flows to the oil receiving plate;

[0028] Step five: oil extraction

[0029] When the synchronous wheel drives the lead screw to rotate and drives the lead screw nut to move upward, the oil receiving plate is compressed in the front, and the telescopic rod is retracted into the fixed rod; the telescopic rod will first extrude the silica gel sleeve onto the oil receiving plate when the lead screw nut moves upward, and then compresses the silica gel sleeve; the oil absorption cotton in the silica gel sleeve is compressed, the sealing piece is pushed open, and the lubricating oil in the silica gel sleeve enters the oil discharge pipe;

[0030] When the synchronous wheel drives the lead screw to reverse and drives the lead screw nut to move downward, the sealing piece blocks the oil port by using its own gravity, the telescopic rod moves outward under the action of the spring, the silica gel sleeve and the oil absorption cotton are gradually released from the pressure, and after the telescopic rod is completely reset, a gap exists between the silica gel sleeve and the oil receiving plate, and the lubricating oil is absorbed into the oil absorption cotton in the silica gel sleeve;

[0031] The up-and-down reciprocating movement of the lead screw nut and the opening and closing actions of the sealing piece are completed simultaneously, and the extraction of the lubricating oil in the oil receiving plate is completed.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] 1. Solve the interference problem: a plurality of tensioning pieces are fixed on the lead screw bearing seat according to the shape of the lead screw nut, the flexible protective cover is sleeved on the outer side of the tensioning piece, the inner wall of the flexible protective cover after tensioning avoids the outer circulating ball cover on the lead screw nut, so that when the synchronous wheel drives the lead screw to rotate, the lead screw nut does not rub against the flexible protective cover after moving upward and downward.

[0034] 2. Solve pollution, noise problem: due to the high speed rotation of the ball screw, the screw bearing seat needs to be injected with oil lubrication every certain period of time, so as to reduce the noise of bearing rotation, the excess lubricating oil will flow down along the screw, when the screw rotates at high speed, the flowing lubricating oil is thrown off the screw with the high speed rotation of the screw, and is hung on the inner wall of the flexible protective cover and flows down, the root of the flexible protective cover is provided with an oil receiving part, so that the hung flowing lubricating oil reaches the oil receiving part position, is shunted to both sides along the oil guide plate, and finally reaches the oil receiving plate, and will not flow out of the oil receiving plate due to the joint of the two oil receiving plates.

[0035] 3. Solve the installation and maintenance problem: four tensioning pieces are reasonably arranged on the screw bearing seat through the connecting plate, and the connecting flange is convenient for being connected with the oil receiving device. Meanwhile, it is also convenient for installing the flexible protective cover. Since the effective stroke of the heavy load ball screw of the pure electric bending machine is generally in the range of 200-300 mm, and the length of the screw nut is sometimes less than the effective stroke of the ball screw, the length of the flexible adjustable tensioning piece is selected as the supporting frame, so that the tensioning piece can buffer and increase the screw stroke without hitting the nut when the ball screw is at the limit stroke position.

[0036] 4. Solve the oil discharge problem: the gap between the silica gel sleeve and the bottom surface of the oil receiving plate can be adjusted through the installation screw, so that the lubricating oil recovered in the oil receiving plate can be absorbed by the oil absorption cotton through the gap. When the oil level sensor detects that there is lubricating oil exceeding the set level in the oil receiving plate, the ball screw stroke position can be reset through the bending machine numerical control system, the oil receiving plate is repeatedly pressed with the screw nut, the oil in the oil absorption cotton in the silica gel sleeve is squeezed, the plugging part of the oil discharge port is lifted, and the oil in the oil receiving plate can be discharged through the oil discharge pipe through repeated operation.

[0037] 5. Solve the oil cleaning problem: the top rod is arranged on the screw bearing seat, the distance between the rod piece one and the rod piece two is reduced, the outer expansion piece is bent and deformed outward, the top rod drives the sliding block and the oil scraping strip sliding on the outer expansion piece to move downward to clean and scrape the lubricating oil on the inner wall of the flexible protective cover, the outer expansion piece is arranged between the fixed rod and the connecting flange, when the tensioning piece is contracted, the top rod drives the outer expansion piece to move downward while moving outward along the outer expansion piece, first contacts the inner wall of the flexible protective cover, and then cleans the oil on the inner wall of the flexible protective cover downward, and when the tensioning piece is reset, the top rod indirectly drives the oil scraping strip to separate from the inner wall of the flexible protective cover. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is the overall structure schematic diagram of the present application;

[0039] Figure 2 It is the overall structure diagram of the tensioning piece of the present application;

[0040] Figure 3 It is the structure diagram of the tensioning piece in the natural state of the present application;

[0041] Figure 4 For Figure 3 Enlarged view of the oil receiving part;

[0042] Figure 5 For the structure of the invention after the tensioner is fully compressed;

[0043] Figure 6 For Figure 5 Enlarged view of the oil receiving part;

[0044] Figure 7 For the structure of the invention after the flexible protective cover and oil receiving part are installed;

[0045] Figure 8 For the top-down view of the invention after the flexible protective cover and oil receiving part are installed;

[0046] Figure 9 For the structure of the invention in the natural state of the top rod and the outer expansion element;

[0047] Figure 10 For the structure of the invention in the natural state of the top rod and the outer expansion element.

[0048] In the figure: 1, pressure head; 2, screw nut; 3, outer circulating ball cover; 4, oil receiving part; 4-1, oil receiving plate; 4-2, inner receiving plate; 5, flexible protective cover; 5-1, silica gel cover; 5-2, oil guide plate; 5-3, notch; 6, tensioner; 6-1, connecting plate; 6-2, fixed rod; 6-3, telescopic rod; 6-4, connecting flange; 6-5, rod one; 6-6, rod two; 6-7, outer expansion element; 6-8, oil scraping strip; 6-8-1, hard body; 6-8-2, soft body; 6-9, top rod; 7, screw bearing seat; 8, screw; 9, synchronous wheel; 11, silica gel sleeve; 12, oil absorbing cotton; 13, connecting piece; 14, oil level sensor; 15, oil discharge pipe; 16, plugging element. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0050] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] Embodiment one

[0052] As Figures 1 to 8 The heavy load ball screw protection device includes a screw bearing seat 7 and a screw nut 2, a tensioning piece 6, a flexible protective cover 5, and an oil receiving piece 4.

[0053] The tensioning piece 6 is provided with four and is circumferentially distributed on the outer side of the screw rod 8. The plurality of tensioning pieces 6 are installed on the screw bearing seat 7, and the tensioning piece 6 is adapted to selectively extend along the length direction of the screw rod 8.

[0054] The flexible protective cover 5 is sleeved on the outer side of the tensioning piece 6, and the end of the flexible protective cover 5 away from the screw bearing seat 7 is freely passed through the outer circulating ball cover 3 of the screw nut 2.

[0055] The oil receiving piece 4 is installed on the end of the flexible protective cover 5 away from the screw bearing seat 7, and the oil receiving piece 4 is connected with the end of the tensioning piece 6 away from the screw bearing seat 7 and is adapted to receive lubricating oil.

[0056] The tensioning piece 6 includes a connecting plate 6-1, a fixed rod 6-2, a spring, an extension rod 6-3, and a connecting flange 6-4. The connecting plate 6-1 is installed on the screw bearing seat 7. The fixed rod 6-2 is installed on the connecting plate 6-1. The fixed rod 6-2 is connected with the extension rod 6-3 through the spring. The extension rod 6-3 is partially exposed on the outer side of the fixed rod 6-2 and is connected with the connecting flange 6-4. The connecting flange 6-4 is adapted to connect the oil receiving piece 4.

[0057] The flexible protective cover 5 includes a silica gel cover 5-1 and a notch 5-3 provided at the end away from the screw bearing seat 7.

[0058] The oil receiving piece 4 includes four circumferentially distributed oil receiving plates 4-1. The oil receiving plate 4-1 is provided with an inner receiving plate 4-2 and an oil guide plate 5-2, and a connecting block. The inner receiving plate 4-2 is installed on the inner wall of the silica gel cover 5-1 of the flexible protective cover 5. The oil guide plate 5-2 is installed on the oil receiving plate 4-1 and is located at the notch 5-3 of the flexible protective cover 5. The oil guide plate 5-2 is adapted to guide the flowing down lubricating oil to the triangular plate position. The lubricating oil will be divided into two parts along the notch 5-3 (the inclined edge of the triangle) and finally enters the oil receiving plate 4-1 at the four corners. The lubricating oil will not flow out of the oil receiving plate 4-1 due to the joint of the two oil receiving plates 4-1. The connecting block and the connecting flange 6-4 are fixedly installed through the connecting piece 13.

[0059] In the installation, four tensioners 6 are fixed on the screw bearing seat 7 according to the shape of the screw nut 2, and the connecting plate 6-1 is installed on the screw bearing seat 7 and is opposite to the screw nut 2, the silica gel cover 5-1 of the flexible protective cover 5 is sleeved on the outside of the fixed rod 6-2 of the tensioner 6 in the direction of the screw nut 2, the silica gel cover 5-1 of the flexible protective cover 5 after expansion avoids the outer circulating ball cover 3 of the screw nut 2, when the synchronous wheel 9 drives the screw 8 to rotate, the screw nut 2 moves up and down without friction with the silica gel cover 5-1 of the flexible protective cover 5, the silica gel cover 5-1 of the flexible protective cover 5 is extruded to the side close to the screw bearing seat 7, the connecting flange 6-4 is completely exposed, the inner connecting plate 4-2 of the oil receiving plate 4-1 is inserted into the inner wall of the silica gel cover 5-1 of the flexible protective cover 5 and is attached, and the connecting block is connected with the corresponding connecting flange 6-4 through the connecting piece 13.

[0060] When the screw 8 rotates at high speed, the lubricating oil flows away from the screw 8 with the high-speed rotation of the screw 8, hangs on the inner wall of the silica gel cover 5-1 of the flexible protective cover 5 and flows downward, and finally flows to the oil receiving plate 4-1.

[0061] Example two

[0062] In example 1, as shown in the drawings, the oil receiving part 4 is provided with an oil pumping structure and an oil level sensor 14. Figures 3 to 6

[0063] The oil pumping structure is suitable for discharging the lubricating oil exceeding the set amount. The oil pumping structure comprises a silica gel sleeve 11, the silica gel sleeve 11 is installed on the side of the connecting flange 6-4 opposite to the oil receiving part 4, the silica gel sleeve 11 is provided with an oil port, the silica gel sleeve 11 at the oil port is provided with an oil discharging pipe 15, the oil discharging pipe 15 is provided with a plugging piece 16, preferably a steel ball, the plugging piece 16 is suitable for automatically closing the oil port by gravity. A gap is reserved between the bottom of the silica gel sleeve 11 and the oil receiving plate 4-1 in the natural state, which is suitable for the internal oil absorbing cotton 12 to absorb the lubricating oil, when the screw nut 2 moves upward, the telescopic rod 6-3 is compressed, and then the silica gel sleeve 11 first contacts the oil receiving plate 4-1 and compresses the internal oil absorbing cotton 12, and then the internal lubricating oil is discharged to the oil discharging pipe 15 by opening the plugging piece 16, and the whole protective device achieves the automatic oil discharging function.

[0064] The oil level sensor 14 is suitable for detecting whether the amount of lubricating oil in the oil receiving part 4 reaches the set amount, the set amount is the set lubricating oil level, when the set amount is exceeded, the ball screw stroke position can be reset through the numerical control system of the bending machine, the oil receiving plate 4 is repeatedly pressed with the screw nut 2 to extrude the oil in the oil absorbing cotton 12 in the silica gel sleeve 11 and open the steel ball 16 of the oil discharging port, and the oil in the oil receiving part can be discharged through the oil discharging pipe 15 through repeated operation.

[0065] ​Different from the embodiment 1, the oil level sensor 14 is installed on the connecting flange 6-4 before the oil receiving part 4 is installed, the silica gel cover 5-1 of the flexible protective cover 5 is extruded towards the side close to the screw bearing seat 7, the connecting flange 6-4 is completely exposed, the inner receiving plate 4-2 of the oil receiving plate 4-1 is inserted into the inner wall of the flexible protective cover 5 and is attached, the connecting block is connected with the corresponding connecting flange 6-4 through the connecting part 13, the connecting flange 6-4 is slidably arranged on the connecting block, the connecting part 13 is suitable for limiting the maximum distance between the connecting flange 6-4 and the connecting block, the maximum distance is greater than the silica gel sleeve 11 in the natural state, the oil absorbing cotton 12 inside the silica gel sleeve 11 can absorb the lubricating oil in the oil receiving part 4, and the distance can be adjusted through the connecting part 13 (screw);

[0066] When the synchronous wheel 9 drives the screw rod 8 to rotate and then drives the screw nut 2 to move upwards, the oil receiving plate 4-1 is compressed from the front, the telescopic rod 6-3 is retracted into the fixed rod 6-2 to extrude the spring inside, the telescopic rod 6-3 will first extrude the silica gel sleeve 11 to the oil receiving plate 4-1 when the screw nut 2 moves upwards, then the silica gel sleeve 11 is compressed, the oil absorbing cotton 12 in the silica gel sleeve 11 is compressed, the blocking part 16 is opened, and the lubricating oil in the silica gel sleeve 11 enters the oil discharge pipe 15;

[0067] When the synchronous wheel 9 drives the screw rod 8 to reverse and then drives the screw nut 2 to move downwards, the blocking part 16 will first block the oil port by using its own gravity, the telescopic rod 6-3 is moved outwards under the action of the spring, the silica gel sleeve 11 and the oil absorbing cotton 12 are gradually released from the pressure, after the telescopic rod 6-3 is completely reset, there is a gap between the silica gel sleeve 11 and the oil receiving plate 4-1, and the lubricating oil is absorbed into the oil absorbing cotton 12 in the silica gel sleeve 11; the screw nut 2 moves up and down reciprocatingly, the blocking part 16 simultaneously opens and closes, and the extraction of the lubricating oil in the oil receiving plate 4-1 is completed.

[0068] Embodiment three

[0069] In any of the above embodiments, as shown in Figure 9 and 10 Two adjacent fixed rods 6-2 are installed with a rod one 6-5, two adjacent oil receiving parts 4 are installed with a rod two 6-6, and the rod one 6-5 and the rod two 6-6 are installed with an outer expansion part 6-7, a sliding block is slidably installed on the outer expansion part 6-7, an oil scraping strip 6-8 is installed on the sliding block, a top rod 6-9 is installed between the sliding block and the screw bearing seat 7, one end of the top rod 6-9 is rotatably connected with the sliding block, and the other end is rotatably connected with the screw bearing seat 7.

[0070] The oil scraping strip 6-8 includes a hard body 6-8-1 and a soft body 6-8-2, the hard body 6-8-1 is installed on the sliding block, and the soft body 6-8-2 is suitable for cleaning the lubricating oil on the inner wall of the flexible protective cover 5 when the sliding block moves downwards.

[0071] The top rod 6-9 is arranged on the screw rod bearing seat 7, the distance between the rod member one 6-5 and the rod member two 6-6 is reduced, the outer expansion member 6-7 is bent and deformed outward, the top rod 6-9 drives the sliding block sliding on the outer expansion member 6-7 and the oil scraping strip 6-8 to move downward to scrape the lubricating oil on the inner wall of the silica gel outer cover 5-1 of the flexible protective cover 5, the soft body 6-8-2 of the oil scraping strip 6-8 first contacts the inner wall of the silica gel outer cover 5-1 of the flexible protective cover 5, and then performs the oil scraping operation downward to the inner wall of the silica gel outer cover 5-1 of the flexible protective cover 5, and when the tensioning member 6 is reset, the top rod 6-9 indirectly drives the oil scraping strip 6-8 to separate from the inner wall of the silica gel outer cover 5-1 of the flexible protective cover 5.

[0072] A screw rod protection method of a heavy load ball screw protection device, steps are as follows:

[0073] Step one: install the tensioning member 6

[0074] A corresponding number of tensioning members 6 are reasonably fixed on the screw rod bearing seat 7 according to the shape of the screw rod nut 2, and the connecting plate 6-1 is installed on the screw rod bearing seat 7 and arranged opposite to the screw rod nut 2;

[0075] Step two: install the flexible protective cover 5

[0076] The flexible protective cover 5 is sleeved on the outer side of the tensioning member 6 in the direction of the screw rod nut 2, the expanded flexible protective cover 5 avoids the outer circulating ball cover 3 of the screw rod nut 2, and when the synchronous wheel 9 drives the screw rod 8 to rotate, the screw rod nut 2 moves up and down without friction with the flexible protective cover 5;

[0077] Step three: install the oil receiving member 4

[0078] The oil level sensor 14 is installed on the connecting flange 6-4, the inner connecting plate 4-2 of the oil receiving plate 4-1 is inserted into the inner wall of the flexible protective cover 5 and is attached, the connecting block is connected with the corresponding connecting flange 6-4 through the connecting member 13, the connecting flange 6-4 is slidably arranged relative to the connecting block, and the connecting member 13 is suitable for limiting the maximum distance between the connecting flange 6-4 and the connecting block, the maximum distance is greater than the silica gel sleeve 11 in a natural state, and the oil absorption cotton 12 inside the silica gel sleeve 11 can absorb the lubricating oil in the oil receiving member 4;

[0079] Step four: oil receiving

[0080] When the screw rod 8 rotates at high speed, the flowing lubricating oil is thrown away from the screw rod 8 with the high-speed rotation of the screw rod 8, is hung on the inner wall of the flexible protective cover 5 and flows downward, and finally flows to the oil receiving plate 4-1;

[0081] Step five: oil extraction

[0082] The synchronous wheel 9 drives the screw rod 8 to rotate and drive the screw nut 2 to move upward, the front compression oil receiving plate 4-1 is compressed, the telescopic rod 6-3 is retracted into the fixed rod 6-2, the telescopic rod 6-3 will first extrude the silica gel sleeve 11 to the oil receiving plate 4-1 when the screw nut 2 moves upward, then the silica gel sleeve 11 is compressed, the oil absorbing cotton 12 in the silica gel sleeve 11 is compressed, the sealing element 16 is opened, and the lubricating oil in the silica gel sleeve 11 enters the oil discharge pipe 15;

[0083] When the synchronous wheel 9 drives the screw rod 8 to rotate and drive the screw nut 2 to move downward, the sealing element 16 blocks the oil port by gravity, the telescopic rod 6-3 is moved out under the action of the spring, the silica gel sleeve 11 and the oil absorbing cotton 12 are gradually released from the pressure, and after the telescopic rod 6-3 is completely reset, a gap is formed between the silica gel sleeve 11 and the oil receiving plate 4-1, and the lubricating oil is absorbed into the oil absorbing cotton 12 in the silica gel sleeve 11;

[0084] The screw nut 2 moves up and down reciprocatingly, the sealing element 16 simultaneously opens and closes, and the extraction of the lubricating oil in the oil receiving plate 4-1 is completed.

[0085] The oil extraction process further includes:

[0086] When the screw nut 2 moves upward, the distance between the rod element 6-5 and the rod element 6-6 decreases, the outer expansion element 6-7 is bent and deformed outward, the ejector rod 6-9 drives the slider and the oil scraping strip 6-8 that slide upward on the outer expansion element 6-7 to move downward to clean the lubricating oil on the inner wall of the silica gel outer cover 5-1 of the flexible protective cover 5, and the soft body 6-8-2 of the oil scraping strip 6-8 first contacts the inner wall of the silica gel outer cover 5-1 of the flexible protective cover 5, and then cleans the inner wall of the silica gel outer cover 5-1 of the flexible protective cover 5 downward;

[0087] When the screw nut 2 moves downward, the tensioning element 6 is gradually reset, the ejector rod 6-9 indirectly drives the oil scraping strip 6-8 and the silica gel outer cover 5-1 of the flexible protective cover 5 to move upward, and the oil scraping strip 6-8 and the silica gel outer cover 5-1 of the flexible protective cover 5 are completely separated. At the same time, the outer expansion element 6-7 expands outward to avoid contact between the silica gel outer cover 5-1 and the telescopic rod 6-3, and the soft body 6-8-1 is also made of silica gel material.

[0088] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. The substitution can be a substitution of part of the structure, device, method step, or a complete technical solution. According to the technical solution and the inventive concept of the present application, equivalent substitution or change should be covered within the protection scope of the present application.

Claims

1. A heavy-duty ball screw protection device, comprising a screw bearing seat (7) and a screw nut (2), characterized in that: Also includes: A tensioning member (6), wherein a plurality of tensioning members (6) are provided and circumferentially distributed on the outside of the screw rod (8), the plurality of tensioning members (6) are mounted on the screw rod bearing seat (7), and the tensioning members (6) are selectively extended and retracted along the length direction of the screw rod (8); A flexible protective cover (5), the flexible protective cover (5) is sleeved on the outside of the tensioning member (6), and one end of the flexible protective cover (5) away from the screw bearing seat (7) is free to pass through the outer circulation ball cover (3) of the screw nut (2); An oil receiving member (4), the oil receiving member (4) is mounted on one end of the flexible protective cover (5) away from the screw bearing seat (7), and the oil receiving member (4) is connected to one end of the tensioning member (6) away from the screw bearing seat (7) and receives lubricating oil; The tensioning member (6) comprises a connecting plate (6-1), a fixing rod (6-2), a spring, a telescopic rod (6-3) and a connecting flange (6-4); the connecting plate (6-1) is mounted on the screw bearing seat (7); the fixing rod (6-2) is mounted on the connecting plate (6-1); the fixing rod (6-2) is connected to the telescopic rod (6-3) via the spring; the telescopic rod (6-3) is partially exposed outside the fixing rod (6-2) and is connected to the connecting flange (6-4); and the connecting flange (6-4) is connected to the oil receiving member (4).

2. A heavy-duty ball screw protection device according to claim 1, characterized in that: A notch (5-3) is provided at one end of the flexible protective cover (5) away from the screw rod bearing seat (7).

3. A heavy-duty ball screw protection device according to claim 2, characterized in that: The oil receiving member (4) comprises a plurality of circumferentially distributed oil receiving plates (4-1), the oil receiving plates (4-1) being provided with an inner connecting plate (4-2), an oil guide plate (5-2), and a connecting block, the inner connecting plate (4-2) being mounted on the inner wall of the flexible protective cover (5), the oil guide plate (5-2) being mounted on the oil receiving plate (4-1) and being located at a notch (5-3) of the flexible protective cover (5), and the connecting block and the connecting flange (6-4) being fixedly mounted via a connecting member (13).

4. A heavy-duty ball screw protection device according to claim 1, characterized in that: An oil pumping structure and an oil level sensor (14) are installed in the oil receiving member (4). The oil level sensor (14) detects whether the amount of lubricating oil in the oil receiving member (4) reaches a set amount, and the oil pumping structure discharges lubricating oil exceeding the set amount.

5. A heavy-duty ball screw protection device according to claim 4, characterized in that: The oil extraction structure includes a silicone sleeve (11), which is installed on a side of the connecting flange (6-4) opposite to the oil receiving part (4), and an oil absorbing cotton (12) is installed in the silicone sleeve (11). The silicone sleeve (11) is provided with an oil port, and an oil drain pipe (15) is installed in the silicone sleeve (11) located at the oil port. A sealing member (16) is provided in the oil drain pipe (15), and the sealing member (16) automatically closes the oil port by gravity.

6. A heavy-duty ball screw protection device according to claim 1, characterized in that: A rod member 1 (6-5) is installed between two adjacent fixed rods (6-2), and both ends of the rod member 1 (6-5) are connected to one end of the corresponding fixed rod (6-2) away from the screw bearing seat (7). A rod member 2 (6-6) is installed between two adjacent oil receiving parts (4), and an external expansion member (6-7) is installed between the rod member 1 (6-5) and the rod member 2 (6-6). A slider is slidably installed on the external expansion member (6-7), and an oil scraper (6-8) is installed on the slider. A push rod (6-9) is installed between the slider and the screw bearing seat (7).

7. A heavy-duty ball screw protection device according to claim 6, characterized in that: One end of the push rod (6-9) is rotatably connected to the slider, and the other end is rotatably connected to the screw rod bearing seat (7).

8. A heavy-duty ball screw protection device according to claim 6, characterized in that: The oil scraper (6-8) comprises a hard body (6-8-1) and a soft body (6-8-2). The hard body (6-8-1) is mounted on the slider, and the soft body (6-8-2) cleans the lubricating oil on the inner wall of the flexible protective cover (5) when the slider moves downward.

9. A screw protection method for a heavy-duty ball screw protection device, which refers to the heavy-duty ball screw protection device according to any one of claims 1 to 8, characterized in that: Here are the steps: Step 1: Install the tensioner (6) A corresponding number of tensioning members (6) are reasonably fixed on the screw bearing seat (7) according to the shape of the screw nut (2), and the connecting plate (6-1) is installed on the screw bearing seat (7) and arranged opposite to the screw nut (2); Step 2: Install the flexible protective cover (5) The flexible protective cover (5) is mounted on the outside of the tensioning member (6) in the direction of the screw nut (2). After being tightened, the flexible protective cover (5) avoids the outer circulation ball cover (3) of the screw nut (2). When the synchronous wheel (9) drives the screw (8) to rotate, the screw nut (2) moves up and down without friction with the flexible protective cover (5). Step 3: Install the oil receiving parts (4) The oil level sensor (14) is mounted on the connecting flange (6-4), the inner connecting plate (4-2) of the oil receiving plate (4-1) is inserted into and fitted on the inner wall of the flexible protective cover (5), the connecting block and the corresponding connecting flange (6-4) are connected via the connecting piece (13), the connecting flange (6-4) is arranged to slide relative to the connecting block, and the connecting piece (13) limits the maximum distance between the connecting flange (6-4) and the connecting block, the maximum distance being greater than the silicone sleeve (11) in its natural state, so that the oil-absorbing cotton (12) inside the silicone sleeve (11) can absorb the lubricating oil in the oil receiving piece (4); Step 4: Oil collection When the screw (8) rotates at high speed, the flowing lubricating oil is thrown off the screw (8) as the screw (8) rotates at high speed, hangs on the inner wall of the flexible protective cover (5) and flows downward, and finally flows onto the oil receiving plate (4-1); Step 5: Oil extraction The synchronous wheel (9) drives the screw (8) to rotate and drives the screw nut (2) upward, compressing the oil receiving plate (4-1) from the front, and the telescopic rod (6-3) retracts into the fixed rod (6-2). When the screw nut (2) moves upward, the telescopic rod (6-3) first squeezes the silicone sleeve (11) onto the oil receiving plate (4-1), and then compresses the silicone sleeve (11). The oil-absorbing cotton (12) in the silicone sleeve (11) is compressed, pushing open the sealing piece (16), and the lubricating oil in the silicone sleeve (11) enters the oil drain pipe (15); When the synchronous wheel (9) drives the screw (8) to reverse and drive the screw nut (2) downward, the sealing member (16) uses its own gravity to seal the oil port, the telescopic rod (6-3) moves outward under the action of the spring, and the silicone sleeve (11) and the oil-absorbing cotton (12) are gradually released from pressure. After the telescopic rod (6-3) is completely reset, a gap exists between the silicone sleeve (11) and the oil receiving plate (4-1), and the lubricating oil is sucked into the oil-absorbing cotton (12) in the silicone sleeve (11); The screw nut (2) reciprocates up and down, and the blocking member (16) simultaneously opens and closes, completing the extraction of lubricating oil from the oil receiving plate (4-1).

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