Lead screw assembly of testing machine feeding device

Abstract

The utility model belongs to the field of lead screw assemblies, and particularly relates to an experiment machine feeding device lead screw assembly which comprises a machine base, a supporting plate is fixedly connected to the inner side of the machine base, a motor is fixedly installed on the right side of the upper end of the supporting plate, and a lead screw is fixedly connected to the tail end of an output shaft of the motor. An equipment mounting seat is slidably connected to the top of the machine base, a hollow seat is fixedly connected to the middle of the lower end of the equipment mounting seat, and the lead screw penetrates through the hollow seat and is in threaded connection with the hollow seat. The lubricating mechanism is arranged in the hollow seat in transmission with the lead screw and adopts a mechanical linkage type automatic oil supply design, so that when the equipment mounting seat moves, the sliding pin is in contact with the convex block to generate periodic downward pressure, and an oil pumping action is formed by compressing the spring I through the sliding plate; and meanwhile, the lifting pin pushes the inclined surface block to transversely extrude the oil storage sponge to realize double oil outlet control, so that the lead screw and the hollow seat are automatically lubricated, the abrasion of the lead screw is reduced, and the transmission efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of lead screw assembly technology, specifically a lead screw assembly for a test machine feed device. Background Technology

[0002] In precision testing machines (such as material testing machines, optical inspection equipment, and semiconductor processing equipment), the lead screw drive mechanism is the core component for achieving high-precision linear feed. A traditional lead screw assembly typically includes a motor, lead screw, nut seat, and guide mechanism.

[0003] A search revealed that the invention patent with publication number CN104122087A discloses a ball screw performance test bench driven by a linear motor. A large cylindrical guide rail is connected between the front and rear support plates of the bed. The cylindrical guide rail slider is connected to the worktable. A nut seat is fixedly connected to the top of the worktable. A linear motor mover is installed at the bottom of the worktable. The linear motor mover is connected to the linear motor stator. A ball screw nut is installed in the nut seat. A linear guide rail is installed at the rear end of the bed. The linear guide rail is connected to a movable end through a slider. The movable end is equipped with a movable end positioning mechanism.

[0004] Traditional linear screw assemblies experience significant wear between the transmission components connected to the screw and the screw itself during use, affecting their service life. In addition, the open screw structure easily accumulates contaminants such as dust and metal shavings, which exacerbates wear on the threaded pair. Utility Model Content

[0005] The purpose of this utility model is to provide a lead screw assembly for the feed device of an experimental machine, which solves the problem that in the traditional linear lead screw assembly, there is a large wear between the transmission component connected to the lead screw and the lead screw during use, which affects the service life. At the same time, it solves the problem that the open lead screw structure is prone to accumulating dust, metal shavings and other contaminants, which aggravates the wear of the threaded pair.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lead screw assembly for a feed device of an experimental machine, comprising a base, a support plate fixedly connected to the inner side of the base, a motor fixedly mounted on the upper right side of the support plate, a lead screw fixedly connected to the end of the output shaft of the motor, an equipment mounting seat slidably connected to the top of the base, a hollow seat fixedly connected to the lower middle part of the equipment mounting seat, the lead screw passing through the hollow seat and connected to the hollow seat by a thread, a lubrication mechanism being provided inside the hollow seat, a base plate fixedly connected to the upper end of the support plate, and multiple protrusions fixedly connected to the upper end of the base plate.

[0007] Preferably, a guide frame is fixedly connected to the top of the base, and the guide frame passes through the equipment mounting base and is slidably connected to the equipment mounting base. The guide frame guides the axial movement of the equipment mounting base along the lead screw.

[0008] Preferably, the bottom edge of the equipment mounting base is provided with ball bearings, which contact the top of the base. The ball bearings reduce the friction between the equipment mounting base and the base.

[0009] Preferably, the bottom of the equipment mounting base is fixedly connected to two connecting rods, and a hollow sleeve is fixedly connected to the end of each connecting rod. A sponge sleeve is fixedly connected to the inner wall of the hollow sleeve, and the sponge sleeve is slidably fitted onto the outside of the lead screw. The sponge sleeve allows for cleaning of the lead screw.

[0010] Preferably, a rubber stopper is slidably connected to the upper part of the side wall of the hollow seat, and the rubber stopper is provided through the hollow seat. Lubricating oil can be added to the hollow seat through the rubber stopper.

[0011] Preferably, the lubrication mechanism includes a sliding plate slidably connected inside the hollow seat. A sliding pin is fixedly connected to the bottom of the sliding plate, penetrating the hollow seat and slidably connected to it. The position of the sliding pin corresponds to the position of the protrusion, and the arc end of the sliding pin abuts against the base plate. A spring is fixedly connected to the bottom inner side of the hollow seat, and the top of the spring is fixedly connected to the sliding plate. A sealing ring is embedded in the side of the sliding plate, and the sealing ring is slidably connected to the inner wall of the hollow seat. An oil-collecting sponge contacts the upper end of the sliding plate and is slidably connected inside the hollow seat. An oil outlet hole is provided inside the hollow seat, and the position of the oil outlet hole corresponds to both the oil-collecting sponge and the lead screw. This lubrication mechanism provides automatic lubrication for the threaded connection between the hollow seat and the lead screw.

[0012] Preferably, a top pin is fixedly connected to the upper end of the slide plate, and an inclined block is slidably connected inside the hollow seat. The inclined surface of the inclined block abuts against the top pin, and the inclined block contacts the oil-collecting sponge. A guide rod is fixedly connected to the inner wall of the hollow seat, and the guide rod is slidably connected to the inclined block. A second spring is provided inside the inclined block, one end of which is fixedly connected to the guide rod, and the other end of which is fixedly connected to the inner surface of the inclined block. The top pin moves upward with the slide plate under force, and through its cooperation with the inclined block, it can laterally compress the oil-collecting sponge.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model provides a lubrication mechanism within the hollow seat connected to the lead screw drive. The lubrication mechanism employs a mechanical linkage automatic oil supply design. When the equipment mounting base moves, the sliding pin contacts the protrusion, generating periodic downward pressure. This pressure, through the compression of the spring by the sliding plate, forms an oil pumping action. Simultaneously, the top pin pushes the inclined block to laterally squeeze the oil storage sponge, achieving dual oil supply control. This provides automatic lubrication between the lead screw and the hollow seat, reducing lead screw wear and improving transmission efficiency.

[0015] 2. This utility model provides a connecting rod on the equipment mounting base, with a hollow sleeve containing a built-in sponge sleeve at the end of the connecting rod. The hollow sleeve and the sponge sleeve are fitted onto the outside of the lead screw and can move forward and backward synchronously with the equipment mounting base. In this way, impurities on the surface of the lead screw are continuously removed during the movement of the equipment mounting base, thereby further improving the transmission efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 A partial structural diagram;

[0018] Figure 3 This utility model Figure 1 A front sectional view;

[0019] Figure 4 This utility model Figure 3 Enlarged view of point A.

[0020] In the diagram: 1. Base; 2. Support plate; 3. Motor; 31. Lead screw; 4. Equipment mounting base; 5. Hollow seat; 6. Lubrication mechanism; 7. Guide frame; 8. Ball bearing; 9. Connecting rod; 10. Hollow sleeve; 11. Sponge sleeve; 12. Base plate; 13. Protrusion; 14. Rubber plug; 61. Slide plate; 62. Sliding pin; 63. Spring 1; 64. Sealing ring; 65. Oil storage sponge; 66. Top pin; 67. Inclined block; 68. Guide rod; 69. Spring 2; 610. Oil outlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-3A lead screw assembly for a test machine feed device includes a base 1. A support plate 2 is fixedly connected to the inner side of the base 1. A motor 3 is fixedly mounted on the upper right side of the support plate 2. A lead screw 31 is fixedly connected to the end of the output shaft of the motor 3. An equipment mounting seat 4 is slidably connected to the top of the base 1. A hollow seat 5 is fixedly connected to the lower middle part of the equipment mounting seat 4. The lead screw 31 passes through the hollow seat 5 and is threadedly connected to the hollow seat 5. A base plate 12 is fixedly connected to the upper end of the support plate 2. Multiple protrusions 13 are fixedly connected to the upper end of the base plate 12. A guide frame 7 is fixedly connected to the top of the base 1. The guide frame 7 passes through the equipment mounting seat 4 and is slidably connected to the equipment mounting seat 4. The guide frame 7 guides the axial movement of the equipment mounting seat 4 along the lead screw 31. Ball bearings 8 are provided on the bottom edge of the equipment mounting seat 4 and contact the top of the base 1. The ball bearings 8 reduce the friction between the equipment mounting seat 4 and the base 1. A rubber plug 14 is slidably connected to the upper side wall of the hollow seat 5, and the rubber plug 14 is configured to penetrate the hollow seat 5. Lubricating oil can be added into the hollow seat 5 through the rubber plug 14.

[0023] Please see Figures 1-3 Two connecting rods 9 are fixedly connected to the bottom of the equipment mounting base 4. A hollow sleeve 10 is fixedly connected to the end of each connecting rod 9. A sponge sleeve 11 is fixedly connected to the inner wall of the hollow sleeve 10, and the sponge sleeve 11 is slidably sleeved on the outside of the lead screw 31. The sponge sleeve 11 can be used to clean the dust from the lead screw 31.

[0024] Please see Figures 3-4The hollow seat 5 is equipped with a lubrication mechanism 6. The lubrication mechanism 6 provides automatic lubrication for the threaded connection between the hollow seat 5 and the lead screw 31. The lubrication mechanism 6 includes a sliding plate 61 that is slidably connected inside the hollow seat 5. A sliding pin 62 is fixedly connected to the bottom of the sliding plate 61. The sliding pin 62 passes through the hollow seat 5 and is slidably connected to the hollow seat 5. The position of the sliding pin 62 corresponds to the position of the protrusion 13. The arc end of the sliding pin 62 abuts against the base plate 12. A spring 63 is fixedly connected to the bottom inner side of the hollow seat 5. The top of the spring 63 is fixedly connected to the sliding plate 61. A sealing ring 64 is embedded in the side of the sliding plate 61. The sealing ring 64 is slidably connected to the inner wall of the hollow seat 5. An oil storage sponge 65 is in contact with the upper end of the sliding plate 61 and is slidably connected to the inside of the hollow seat 5. An oil outlet hole 610 is opened inside the hollow seat 5, and the position of the oil outlet hole 610 corresponds to both the oil storage sponge 65 and the lead screw 31. A top pin 66 is fixedly connected to the upper end of the slide plate 61. An inclined block 67 is slidably connected inside the hollow seat 5. The inclined surface of the inclined block 67 abuts against the top pin 66, and the inclined block 67 contacts the oil-collecting sponge 65. A guide rod 68 is fixedly connected to the inner wall of the hollow seat 5, and the guide rod 68 is slidably connected to the inclined block 67. A second spring 69 is installed inside the inclined block 67. One end of the second spring 69 is fixedly connected to the guide rod 68, and the other end of the second spring 69 is fixedly connected to the inner surface of the inclined block 67. The top pin 66 moves upward with the slide plate 61 under force, and through its cooperation with the inclined block 67, it can laterally compress the oil-collecting sponge 65.

[0025] The specific implementation process of this utility model is as follows: In use, the motor 3 drives the lead screw 31 to rotate, and the hollow seat 5, through the threaded transmission with the lead screw 31, causes the equipment mounting seat 4 to move axially in and out of the lead screw 31. When the equipment mounting seat 4 moves, the sliding pin 62 contacts the protrusion 13 to generate periodic downward pressure, which compresses the spring 63 through the sliding plate 61 to form an oil pumping action; at the same time, the top pin 66 pushes the inclined block 67 to laterally squeeze the oil storage sponge 65, realizing dual oil output control, thereby automatically lubricating the lead screw 31 and the hollow seat 5, reducing the wear of the lead screw 31, and improving the transmission efficiency. At the same time, the equipment mounting seat 4 drives the connecting rod 9, the hollow sleeve 10 and the sponge sleeve 11 to rotate, thereby continuously removing impurities from the surface of the lead screw 31, further improving the transmission efficiency.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test machine feed device screw assembly comprising a machine base (1) characterised in that: The inner side of the base (1) is fixedly connected with a support plate (2), the upper end right side of the support plate (2) is fixedly installed with a motor (3), the output shaft terminal of the motor (3) is fixedly connected with a lead screw (31), the top of the base (1) is slidingly connected with an equipment mounting seat (4), the lower end middle part of the equipment mounting seat (4) is fixedly connected with a hollow seat (5), the lead screw (31) penetrates through the hollow seat (5) and is connected with the hollow seat (5) through screw threads, the inside of the hollow seat (5) is provided with a lubricating mechanism (6), the upper end of the support plate (2) is fixedly connected with a bottom plate (12), the upper end of the bottom plate (12) is fixedly connected with a plurality of protrusions (13).

2. An experimental machine feed device leadscrew assembly according to claim 1 wherein: The top of the base (1) is fixedly connected with a guide frame (7), the guide frame (7) penetrates through the equipment mounting seat (4) and is slidingly connected with the equipment mounting seat (4).

3. An experimental machine feed device leadscrew assembly according to claim 1 wherein: The bottom edge of the equipment mounting seat (4) is provided with a ball (8), the ball (8) is in contact with the top of the base (1).

4. An experimental machine feed device leadscrew assembly according to claim 1 wherein: The bottom of the equipment mounting seat (4) is fixedly connected with two connecting rods (9), the terminal of each connecting rod (9) is fixedly connected with a hollow sleeve (10), the inner ring wall of the hollow sleeve (10) is fixedly connected with a sponge sleeve (11), and the sponge sleeve (11) is slidingly sleeved on the outside of the lead screw (31).

5. An experimental machine feed device leadscrew assembly according to claim 1 wherein: The upper part of the side wall of the hollow seat (5) is slidingly connected with a rubber plug (14), and the rubber plug (14) is provided through the hollow seat (5).

6. An experimental machine feed device leadscrew assembly according to claim 1 wherein: The lubricating mechanism (6) comprises a sliding plate (61) slidingly connected in the inside of the hollow seat (5), the bottom of the sliding plate (61) is fixedly connected with a sliding pin (62), the sliding pin (62) penetrates through the hollow seat (5) and is slidingly connected with the hollow seat (5), the position of the sliding pin (62) corresponds to the position of the protrusion (13), the circular arc end of the sliding pin (62) is in abutment with the bottom plate (12), the inside bottom of the hollow seat (5) is fixedly connected with a spring one (63), the top of the spring one (63) is fixedly connected with the sliding plate (61), the side edge of the sliding plate (61) is embedded with a sealing ring (64), the sealing ring (64) is slidingly connected with the inner wall of the hollow seat (5), the upper end of the sliding plate (61) is in contact with an oil storage sponge (65), and the oil storage sponge (65) is slidingly connected in the inside of the hollow seat (5), the inside of the hollow seat (5) is provided with an oil outlet hole (610), and the position of the oil outlet hole (610) corresponds to the oil storage sponge (65) and the lead screw (31).

7. An experimental machine feed device leadscrew assembly according to claim 6 wherein: The upper end of the sliding plate (61) is fixedly connected with a top pin (66), the inside of the hollow seat (5) is slidably connected with an inclined block (67), the inclined surface part of the inclined block (67) is in abutment with the top pin (66), the inclined block (67) is in contact with the oil storage sponge (65), the inner wall of the hollow seat (5) is fixedly connected with a guide rod (68), the guide rod (68) is slidably connected with the inclined block (67), the inside of the inclined block (67) is provided with a spring two (69), one end of the spring two (69) is fixedly connected with the guide rod (68), the other end of the spring two (69) is fixedly connected to the inner surface of the inclined block (67).

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