Stamping device with automatic lubricating function

Abstract

The invention discloses a stamping device with an automatic lubricating function, and relates to the technical field of stamping devices. Comprising a conveying frame, a conveying and conveying mechanism used for conveying parts to be stamped is installed on the conveying frame, a stamping mechanism and a lubricating mechanism used for lubricating the stamping mechanism are arranged on a conveying path of the conveying and conveying mechanism, the stamping mechanism comprises an installation frame, and a stamping assembly is installed on the installation frame. During stamping, the stamping assembly works to drive the pressing frame to downwards press the top ends of the first rotating frame and the second rotating frame, so that the bottom ends of the first rotating frame and the second rotating frame upwards support the top bracket, and then a to-be-stamped part is upwards supported by the supporting seat on the top bracket; stamping machining of the to-be-stamped part is achieved; according to the mode, the situation that stamping is conducted directly through supporting of the conveying mechanism is avoided, the stamping stability is improved, and the top bracket and other structures are driven only through the stamping assembly to move, and no extra power source is needed.

Description

Technical Field

[0001] The invention relates to the technical field of punching devices, and in particular to a punching device with an automatic lubrication function. Background Art

[0002] In modern industrial production, stamping is a common and important metal processing method, which is widely used in many fields such as automobiles, electronics, aerospace, etc. Traditional stamping devices usually include a conveying mechanism and a stamping mechanism. The conveying mechanism transports the metal sheet or parts to be processed to the specified position, and then the stamping mechanism completes the stamping operation. However, this traditional design has some limitations.

[0003] Traditional stamping devices often rely on a single conveying mechanism to support and position the parts to be stamped. This method is prone to affect the stamping effect during the stamping process due to insufficient support capacity of the conveying mechanism. For example, due to the lack of an effective support structure, large-sized or irregular-shaped parts are prone to deformation during the stamping process, further reducing the yield rate.

[0004] Some stamping devices are provided with a supporting mechanism to support the parts to be processed from bottom to top, but the supporting mechanism needs to be driven by an additional power source, which increases the complexity and cost of the equipment.

[0005] Some stamping devices are provided with a fixed base for support, which is less efficient in continuous processing. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a punching device with automatic lubrication function.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A stamping device with automatic lubrication function comprises a conveying frame, on which a conveying mechanism for conveying a workpiece to be stamped is installed, a stamping mechanism and a lubricating mechanism for lubricating the stamping mechanism are arranged on a conveying path of the conveying mechanism, and the stamping mechanism comprises: A mounting frame, on which a stamping assembly is mounted; A mounting block, on which a support rod is mounted so as to be slidable up and down, and the support rod and the mounting block are connected via a first spring; A top bracket, which is fixed to the outer wall of the top end of the support rod and is provided with a support seat; A central column, two central columns are symmetrically mounted on the mounting frame, a first rotating frame and a second rotating frame are rotatably mounted on the outer side of the central column, the first rotating frame and the second rotating frame are connected to the central column through a clockwork spring, the first rotating frame and the second rotating frame form a scissor structure, the bottom ends of the first rotating frame and the second rotating frame are located below the top bracket, and the top ends are located above the top bracket; Wherein, a pressing frame is installed on the stamping assembly, and the pressing frame is located above the top ends of the first rotating frame and the second rotating frame.

[0008] As a preferred embodiment of the present invention, rollers are rotatably mounted on the top and bottom ends of the first rotating frame and the second rotating frame.

[0009] As a preferred embodiment of the present invention: a strip slide is provided on the top bracket, a slider is slidably connected in the strip slide, a U-shaped seat is fixed on the bottom outer wall of the slider, the rollers at the bottom ends of the first rotating frame and the second rotating frame are located in the opening of the U-shaped seat, and the opening width of the U-shaped seat is adapted to the diameter of the roller.

[0010] As a preferred embodiment of the present invention: the stamping assembly includes: A stamping drive cylinder is installed on a mounting frame, and a lifting frame is fixed to the output end of the stamping drive cylinder; The mounting seat is detachably mounted on the lifting frame, a punching head is arranged at the bottom of the mounting seat, the supporting seat is matched with the punching head, and the supporting seat is detachably mounted on the top bracket.

[0011] As a preferred embodiment of the present invention: the inner wall of the lifting frame is connected with a lifting rod for sliding up and down, and the lifting rod and the lifting frame are connected by a second spring; the pressing frame is fixed to the bottom end of the lifting rod; a limiting support frame is installed on the conveying frame, and limiting structures are installed on both sides of the limiting support frame, and the limiting structures are located on the movement paths of the first rotating frame and the second rotating frame.

[0012] As a preferred embodiment of the present invention: the limiting structure includes: A side bracket, the side bracket is installed on an outer wall of one side of the limiting support frame; A vertical pole, which is slidably mounted on the inner wall of the side bracket; The limit baffle is fixed to the outer wall of the top of the vertical pole, and the inner wall of the side bracket is connected with a fixing knob for fixing the vertical pole through a threaded connection. The limit baffle is located on the movement path of the bottom ends of the first rotating frame and the second rotating frame.

[0013] As a preferred embodiment of the present invention: a slide rail is provided at the end of the lifting frame, and a scale line is provided on one side of the slide rail; a mounting block is slidably connected to the inner wall of the slide rail, a threaded knob is rotatably installed in the slide rail, the threaded knob is connected to the inner wall of the mounting block through a thread, a positioning rod is fixed on the top of the mounting block, and one end of the positioning rod away from the mounting block is vertically downward, and the diameter gradually decreases; A connecting arm is fixed to the side wall of the U-shaped seat, a positioning cylinder is fixed to one end of the connecting arm, and a guide cover is provided on the top of the positioning cylinder to guide the insertion of the end of the positioning rod; when the first rotating frame and the second rotating frame are limited by the limiting baffle, the positioning cylinder moves to just below the end of the positioning rod.

[0014] As a preferred embodiment of the present invention: the lubrication mechanism comprises: A lubricating liquid supply device, wherein an output pump is installed on the lubricating liquid supply device, and one end of the output pump is connected to the inside of the lubricating liquid supply device; A delivery pipe, one end of which is connected to the output end of the output pump, and one end of which is connected to a nozzle.

[0015] As a preferred embodiment of the present invention: a ball seat is installed on the mounting frame, the middle part of the nozzle is a spherical structure, the nozzle is movably mounted on the inner wall of the ball seat, and a tightening knob for fixing the nozzle is threadedly connected to the inner wall of one side of the ball seat.

[0016] As a preferred embodiment of the present invention: a collecting box is arranged below the stamping assembly, a pumping pump is installed on one side of the collecting box, one end of the pumping pump is connected to the inside of the collecting box, and the other end of the pumping pump is connected to the lubricating liquid recovery system.

[0017] The beneficial effects of the present invention are: The present invention provides a stamping mechanism, which can transport the workpiece to be stamped to the stamping position through the transmission and conveying mechanism. When stamping is performed, based on the operation of the stamping assembly, the pressing frame is driven to press the top ends of the first rotating frame and the second rotating frame downward, and based on the characteristics of the shear-type structure, the bottom ends of the first rotating frame and the second rotating frame lift the top support frame upward, and then use the support seat on the top support frame to lift the workpiece to be stamped upward, and based on the continued movement of the stamping assembly, the stamping processing of the workpiece to be stamped is achieved; this method avoids stamping directly supported by the transmission and conveying mechanism, improves the stability of stamping, and the movement of structures such as the top support frame is only driven by the stamping assembly, and no additional power source is required.

[0018] The present invention provides a lifting rod, a pressing frame and a limiting structure, which can limit the movement of the first rotating frame and the second rotating frame when pressing down, so that the top bracket can be lifted to a fixed height to facilitate the control of stamping.

[0019] The present invention provides structures such as a positioning rod and a positioning cylinder, and can, during processing, based on the operation of the stamping drive cylinder and the linkage cooperation of various structures, insert the end of the positioning rod into the positioning cylinder to maintain the stability of the position of the positioning cylinder. Since the bottom ends of the first rotating frame and the second rotating frame are located in the U-shaped seat, the stability of the positioning cylinder further stabilizes the first rotating frame and the second rotating frame, thereby achieving further positioning support. Subsequently, the stamping operation is completed by the stamping head, thereby ensuring the stability of the stamping operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the punching mechanism and the lubrication mechanism of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the punching mechanism of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the lifting frame and the mounting base being separated from each other according to the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the cooperation between the first rotating frame, the second rotating frame and the top bracket of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the bottom of the top bracket of the present invention.

[0026] In the figure: 1 conveying frame, 2 conveying and conveying mechanism, 3 positioning rod, 4 mounting frame, 5 stamping drive cylinder, 6 lubricating liquid supply device, 7 pumping pump, 8 to-be-stamped parts, 9 limiting support frame, 10 collecting box, 11 positioning cylinder, 12 pressing frame, 13 second spring, 14 conveying pipe, 15 output pump, 16 slider, 17 top bracket, 18 lifting rod, 19 lifting frame, 20 slide rail, 21 threaded knob, 22 scale line, 23 mounting seat, 24 punching head, 25 mounting block, 26 connecting arm, 27 first rotating frame, 28 center column, 29 second rotating frame, 30 supporting seat, 31 roller, 32 guide cover, 33 first spring, 34 U-shaped seat, 35 supporting rod, 36 fixing knob, 37 vertical rod, 38 limiting baffle, 39 ball seat, 40 nozzle. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Example 1

[0029] A punching device with automatic lubrication function, such as Figure 1-6As shown, it includes a conveying frame 1, on which is installed a conveying mechanism 2 for conveying the workpiece 8 to be stamped. A stamping mechanism and a lubricating mechanism for lubricating the stamping mechanism are arranged on the conveying path of the conveying mechanism 2. The stamping mechanism includes: a mounting frame 4, a mounting block 25, a top bracket 17 and a center column 28.

[0030] In this embodiment, a stamping assembly is installed on the mounting frame 4, and a support rod 35 is installed on the mounting block 25 so as to slide up and down. The support rod 35 and the mounting block 25 are connected by a first spring 33. The top bracket 17 is fixed to the outer wall of the top end of the support rod 35. A support seat 30 is arranged on the top bracket 17. There are at least two center columns 28, and the two center columns 28 are symmetrically installed on the mounting frame 4. The first rotating frame 27 and the second rotating frame 29 are rotatably installed on the outer side of the center column 28. The first rotating frame 27 and the second rotating frame 29 are connected to the center column 28 by a clockwork spring. The first rotating frame 27 and the second rotating frame 29 form a scissor structure. The bottom ends of the first rotating frame 27 and the second rotating frame 29 are located below the top bracket 17, and the top ends are located above the top bracket 17.

[0031] The stamping assembly is provided with a press frame 12 , which is located above the top ends of the first rotating frame 27 and the second rotating frame 29 .

[0032] By setting up a stamping mechanism, the workpiece 8 to be stamped can be transported to the stamping position through the conveying mechanism 2. When stamping is performed, based on the operation of the stamping assembly, the pressing frame 12 is driven to press downward on the top ends of the first rotating frame 27 and the second rotating frame 29. Based on the characteristics of the scissor-type structure, the bottom ends of the first rotating frame 27 and the second rotating frame 29 lift up the top bracket 17, and then use the support seat 30 on the top bracket 17 to lift up the workpiece 8 to be stamped, and based on the continued movement of the stamping assembly, the stamping processing of the workpiece 8 to be stamped is achieved; this method avoids stamping directly supported by the conveying mechanism 2, thereby improving the stability of stamping, and the movement of structures such as the top bracket 17 is only driven by the stamping assembly, without the need for an additional power source.

[0033] To improve movement fluency; Figure 5 As shown, rollers 31 are rotatably mounted on the top and bottom ends of the first rotating frame 27 and the second rotating frame 29. By providing the rollers 31, the smoothness of the structural movement can be improved.

[0034] To improve reliability; Figure 6 As shown, a strip slide is provided on the top bracket 17, a slider 16 is slidably connected inside the strip slide, a U-shaped seat 34 is fixed on the bottom outer wall of the slider 16, and the roller 31 at the bottom end of the first rotating frame 27 and the second rotating frame 29 is located in the opening of the U-shaped seat 34, and the opening width of the U-shaped seat 34 is adapted to the diameter of the roller 31.

[0035] In order to facilitate stamping; Figure 3 , Figure 4 As shown, the stamping assembly includes: a stamping drive cylinder 5 and a mounting seat 23.

[0036] In this embodiment, the stamping drive cylinder 5 is installed on the mounting frame 4, and a lifting frame 19 is fixed to the output end of the stamping drive cylinder 5. The mounting seat 23 is detachably mounted on the lifting frame 19. A stamping head 24 is arranged at the bottom of the mounting seat 23. The support seat 30 is adapted to the stamping head 24. The support seat 30 is detachably mounted on the top bracket 17. There are multiple sets of support seats 30 and mounting seats 23.

[0037] By providing a stamping assembly, and a detachable and replaceable support seat 30 and mounting seat 23, the structure can be replaced according to actual needs to achieve stamping of different shapes.

[0038] In order to facilitate downward pressure; Figure 4 As shown, the inner wall of the lifting frame 19 is connected to a lifting rod 18 for sliding up and down, and the lifting rod 18 and the lifting frame 19 are connected by a second spring 13; the pressing frame 12 is fixed to the bottom end of the lifting rod 18; a limiting support frame 9 is installed on the conveying frame 1, and limiting structures are installed on both sides of the limiting support frame 9, and the limiting structures are located on the movement path of the first rotating frame 27 and the second rotating frame 29.

[0039] By providing the lifting rod 18, the pressing frame 12 and the limiting structure, the movement of the first rotating frame 27 and the second rotating frame 29 can be limited when pressing down, so that the top bracket 17 can be lifted to a fixed height to facilitate the control of the stamping.

[0040] In order to facilitate the movement of the first rotating frame 27 and the second rotating frame 29 to limit the position; Figure 3 As shown, the limiting structure includes: a side bracket, a vertical rod 37 and a limiting baffle 38.

[0041] In this embodiment, the side bracket is installed on the outer wall of one side of the limit support frame 9, the vertical rod 37 is installed on the inner wall of the side bracket for sliding up and down, the limit baffle 38 is fixed to the top outer wall of the vertical rod 37, and the inner wall of the side bracket is threadedly connected with a fixing knob 36 for fixing the vertical rod 37. The limit baffle 38 is located on the movement path at the bottom ends of the first rotating frame 27 and the second rotating frame 29.

[0042] In order to better support fixation; Figure 3 , Figure 4 , Figure 5As shown, a slide rail 20 is provided at the end of the lifting frame 19, and a scale line 22 is provided on one side of the slide rail 20; a mounting block 25 is slidably connected to the inner wall of the slide rail 20, and a threaded knob 21 is rotatably installed in the slide rail 20, and the threaded knob 21 is connected to the inner wall of the mounting block 25 through a thread, and a positioning rod 3 is fixed on the top of the mounting block 25, and the end of the positioning rod 3 away from the mounting block 25 is vertically downward, and the diameter gradually decreases.

[0043] A connecting arm 26 is fixed to the side wall of the U-shaped seat 34, a positioning cylinder 11 is fixed to one end of the connecting arm 26, and a guide cover 32 is provided on the top of the positioning cylinder 11 to guide the insertion of the end of the positioning rod 3; when the first rotating frame 27 and the second rotating frame 29 are limited by the limiting baffle 38, the positioning cylinder 11 moves to just below the end of the positioning rod 3.

[0044] By setting the positioning rod 3, the positioning cylinder 11 and other structures, during processing, the stamping drive cylinder 5 can work to control the lifting frame 19 to move downward. First, the pressing frame 12 contacts the first rotating frame 27 and the second rotating frame 29, presses them downward, causes their bottom ends to lift, and drives the top bracket 17 to rise. At this time, since the first rotating frame 27 and the second rotating frame 29 are in a scissor-type structure, during the movement, the two ends of the first rotating frame 27 and the second rotating frame 29 move in the horizontal direction away from the center column 28, naturally driving the two sliders 16 to move synchronously to both sides; until the first rotating frame 27 and the second rotating frame 29 are in a scissor-type structure ... sliders 16 are in a scissor-type structure, The second rotating frame 29 is limited by the limiting baffle 38, at which time the slider 16 stops moving, and the positioning cylinder 11 moves to just below the end of the positioning rod 3; as the stamping drive cylinder 5 continues to drive the lifting frame 19 to move downward, the end of the positioning rod 3 is inserted into the positioning cylinder 11 to maintain the stability of the position of the positioning cylinder 11. Since the bottom ends of the first rotating frame 27 and the second rotating frame 29 are located in the U-shaped seat 34, the stability of the positioning cylinder 11 achieves further stability of the first rotating frame 27 and the second rotating frame 29, and achieves further positioning support; the stamping operation is then completed by the stamping head 24, ensuring the stability of the stamping operation. Example 2

[0045] A punching device with automatic lubrication function, such as Figure 1 , Figure 2 As shown, in order to facilitate lubrication processing, this embodiment is further improved on the basis of embodiment 1: the lubrication mechanism includes: a lubricating liquid supply device 6 and a delivery pipe 14.

[0046] In this embodiment, an output pump 15 is installed on the lubricating liquid supply device 6, one end of the output pump 15 is connected to the inside of the lubricating liquid supply device 6, one end of the delivery pipe 14 is connected to the output end of the output pump 15, and one end of the delivery pipe 14 is connected to the nozzle 40.

[0047] In order to facilitate the adjustment of the lubricating fluid output position; Figure 1 , Figure 2 As shown, a ball seat 39 is installed on the mounting frame 4, and the middle part of the nozzle 40 is a spherical structure. The nozzle 40 can be movably installed on the inner wall of the ball seat 39. The inner wall on one side of the ball seat 39 is threadedly connected with a fastening knob for fixing the nozzle 40.

[0048] In order to facilitate the recovery of lubricating fluid; Figure 1 , Figure 2 As shown, a collecting box 10 is arranged below the stamping assembly, a pumping pump 7 is installed on one side of the collecting box 10, one end of the pumping pump 7 is connected to the inside of the collecting box 10, and the other end of the pumping pump 7 is connected to the lubricating liquid recovery system.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A punching device with automatic lubrication function, characterized in that: The invention comprises a conveying frame (1), on which a conveying mechanism (2) for conveying a part to be stamped (8) is mounted, a stamping mechanism and a lubricating mechanism for lubricating the stamping mechanism are arranged on a conveying path of the conveying mechanism (2), and the stamping mechanism comprises: A mounting frame (4), on which a stamping assembly is mounted; A mounting block (25), on which a support rod (35) is mounted so as to be slidable up and down, and the support rod (35) and the mounting block (25) are connected via a first spring (33); A top bracket (17), the top bracket (17) being fixed to the outer wall of the top end of the support rod (35), and a support seat (30) being provided on the top bracket (17); A central column (28), wherein two central columns (28) are symmetrically mounted on the mounting frame (4); a first rotating frame (27) and a second rotating frame (29) are rotatably mounted on the outer side of the central column (28); the first rotating frame (27) and the second rotating frame (29) are connected to the central column (28) via a spring; the first rotating frame (27) and the second rotating frame (29) form a scissor structure; the bottom ends of the first rotating frame (27) and the second rotating frame (29) are located below the top bracket (17), and the top ends are located above the top bracket (17); Wherein, a pressing frame (12) is installed on the stamping assembly, and the pressing frame (12) is located above the top ends of the first rotating frame (27) and the second rotating frame (29).

2. A punching device with automatic lubrication function according to claim 1, characterized in that: Rollers (31) are rotatably mounted on the top and bottom ends of the first rotating frame (27) and the second rotating frame (29).

3. A punching device with automatic lubrication function according to claim 2, characterized in that: The top bracket (17) is provided with a strip slideway, a slider (16) is slidably connected in the strip slideway, a U-shaped seat (34) is fixed on the bottom outer wall of the slider (16), and the roller (31) at the bottom end of the first rotating frame (27) and the second rotating frame (29) is located in the opening of the U-shaped seat (34), and the opening width of the U-shaped seat (34) is adapted to the diameter of the roller (31).

4. A punching device with automatic lubrication function according to claim 3, characterized in that: The stamping assembly comprises: A stamping drive cylinder (5), the stamping drive cylinder (5) is mounted on the mounting frame (4), and a lifting frame (19) is fixed to the output end of the stamping drive cylinder (5); The mounting seat (23) is detachably mounted on the lifting frame (19); a punch head (24) is provided at the bottom of the mounting seat (23); the support seat (30) is matched with the punch head (24); and the support seat (30) is detachably mounted on the top bracket (17).

5. A punching device with automatic lubrication function according to claim 4, characterized in that: The inner wall of the lifting frame (19) is slidably connected to a lifting rod (18) up and down, and the lifting rod (18) and the lifting frame (19) are connected via a second spring (13); the pressing frame (12) is fixed to the bottom end of the lifting rod (18); a limit support frame (9) is installed on the conveying frame (1), and limit structures are installed on both sides of the limit support frame (9), and the limit structures are located on the movement paths of the first rotating frame (27) and the second rotating frame (29).

6. A punching device with automatic lubrication function according to claim 5, characterized in that: The limiting structure comprises: A side bracket, the side bracket being mounted on an outer wall of one side of the limiting support frame (9); A vertical rod (37), the vertical rod (37) is slidably mounted on the inner wall of the side bracket; A limit baffle (38) is fixed to the outer wall of the top of the vertical pole (37); a fixing knob (36) for fixing the vertical pole (37) is threadedly connected to the inner wall of the side bracket; the limit baffle (38) is located on the movement path of the bottom ends of the first rotating frame (27) and the second rotating frame (29).

7. A punching device with automatic lubrication function according to claim 6, characterized in that: The end of the lifting frame (19) is provided with a slide rail (20), and a scale line (22) is provided on one side of the slide rail (20); a mounting block (25) is slidably connected to the inner wall of the slide rail (20), a threaded knob (21) is rotatably installed in the slide rail (20), and the threaded knob (21) is connected to the inner wall of the mounting block (25) through a thread, and a positioning rod (3) is fixed on the top of the mounting block (25), and one end of the positioning rod (3) away from the mounting block (25) is vertically downward, and the diameter gradually decreases; A connecting arm (26) is fixed to the side wall of the U-shaped seat (34), a positioning cylinder (11) is fixed to one end of the connecting arm (26), and a guide cover (32) is provided on the top of the positioning cylinder (11) for guiding the insertion of the end of the positioning rod (3); when the first rotating frame (27) and the second rotating frame (29) are limited by the limiting baffle (38), the positioning cylinder (11) moves to the position directly below the end of the positioning rod (3).

8. The punching device with automatic lubrication function according to claim 1, characterized in that: The lubrication mechanism comprises: A lubricating liquid supply device (6), wherein an output pump (15) is mounted on the lubricating liquid supply device (6), and one end of the output pump (15) is connected to the interior of the lubricating liquid supply device (6); A delivery pipe (14), one end of which is connected to the output end of the output pump (15), and one end of which is connected to a nozzle (40).

9. A punching device with automatic lubrication function according to claim 8, characterized in that: A ball seat (39) is mounted on the mounting frame (4), the middle portion of the nozzle (40) is in a spherical structure, the nozzle (40) is movably mounted on the inner wall of the ball seat (39), and a fastening knob for fixing the nozzle (40) is threadedly connected to the inner wall of one side of the ball seat (39).

10. A punching device with automatic lubrication function according to claim 9, characterized in that: A collection box (10) is provided below the punching assembly, a pumping pump (7) is installed on one side of the collection box (10), one end of the pumping pump (7) is connected to the interior of the collection box (10), and the other end of the pumping pump (7) is connected to a lubricating liquid recovery system.

Images