High-precision large-stroke adjusting pad iron

Abstract

The utility model discloses a high accuracy big stroke adjusting pad iron, including pad iron base and the upper cover plate of fixed with its top, be provided with transmission assembly in pad iron base inner chamber, and transmission assembly includes the adjusting worm and worm wheel of intermeshing, the upper cover plate is cooperated with the adjusting block screw thread, and the bottom of adjusting block is provided with transmission square groove, and the top coaxial fixed transmission pin of worm wheel, transmission pin slidingly arranged in transmission square groove, drives worm wheel rotation through the rotation adjusting worm, and drives adjusting block to rotate and ascend or descend relative to the upper cover plate. The utility model discloses through setting adjusting worm and worm wheel and carries out power transmission, makes transmission pin drive adjusting block rotation, realizes up and down lifting under the transmission effect of the fine thread on the outside of adjusting block and the thread engagement of upper cover, thereby realized high accuracy adjustment, and the worm wheel worm gear drive ratio design significantly expands the stroke range, and without gasket auxiliary can adapt to the uneven ground condition of foundation.

Description

Technical Field

[0001] This utility model relates to the field of equipment installation and commissioning technology, specifically a high-precision, long-stroke adjustment shim. Background Technology

[0002] There are many types of mechanical equipment, including machine tools, agricultural machinery, and mining machinery. These machines are mainly divided into two categories: mobile and stationary. Stationary mechanical equipment requires a stable foundation during installation and use; shims are typically used to connect and secure the equipment to the foundation. For mechanical equipment requiring high precision, the level of the equipment needs to be adjusted during connection to the foundation to ensure its stability. Due to industrial development, the precision of mechanical equipment is increasing, making the stability of the foundation particularly important.

[0003] Equipment installation requires good vibration damping and sufficient vertical deflection to stabilize the machine tool on the ground. Currently, equipment foundation adjustment in the industry mainly falls into two categories: First, there are anchor bolts. Hollow bolts are installed on the equipment foundation components. When leveling the equipment, rotating the anchor bolts moves the components up and down. The advantage is high adjustment precision, and the total stroke can be large through bolt length design. The disadvantage is that it requires a matching structure on the components, occupying design space and having significant limitations. Second, there are shims. Shims use a wedge structure and are placed between the equipment foundation components and the ground. The height is adjusted by the position of the wedge in the shim. The advantage is low requirements for equipment component design and space usage. The disadvantage is that most shims have low precision for large adjustment strokes and small adjustment strokes for high precision due to the wedge angle. The maximum adjustment stroke of conventional shims is 4mm~15mm. If the equipment installation foundation has poor levelness, the adjustment stroke of conventional shims is insufficient, requiring the use of shims of different thicknesses. Repeated shim replacement increases labor time and costs. Therefore, we propose a high-precision, large-stroke shim. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision, long-stroke adjustment pad.

[0005] The technical problem solved by this utility model is:

[0006] This utility model can be achieved through the following technical solution: a high-precision large-stroke adjusting shim, including a shim base and an upper cover plate fixed to its top, wherein a transmission component is provided in the inner cavity of the shim base, and the transmission component includes an adjusting worm and a worm wheel that mesh with each other;

[0007] The upper cover plate has an upper cover thread, and the locking cover thread has an internal thread drive for an adjusting block. The bottom of the adjusting block has a drive square groove, and the top of the worm gear is coaxially fixed with a drive pin. The drive pin is slidably set in the drive square groove. By rotating the adjusting worm, the worm gear is driven to rotate, which in turn drives the adjusting block to rotate and rise or fall relative to the upper cover plate.

[0008] A further technical improvement of this utility model is that: a U-shaped groove is opened on the opposite side wall of the pad base, the central shaft of the adjusting worm is mounted on the bottom of the U-shaped groove, and a front pressure plate and a rear pressure plate are provided at the bottom of the upper cover plate, which are respectively inserted into the U-shaped groove to limit the adjustment worm.

[0009] A further technical improvement of this utility model is that: a cover is placed on the top of the adjusting block, the top of the adjusting block is provided with a leveling concave surface, and the bottom of the cover is provided with a matching leveling protrusion.

[0010] A further technical improvement of this utility model is that the top of the cover is provided with anti-slip texture.

[0011] A further technical improvement of this utility model is that a wrench-like protrusion is provided at the end of the adjusting worm gear central shaft extending to the outside of the pad base.

[0012] A further technical improvement of this utility model is that: a locking thread is provided on the outer periphery of a section of the adjusting worm gear central shaft located outside the base of the pad, a locking nut is provided on the outside of the locking thread to cooperate with it, and a washer is provided between the locking nut and the base of the pad.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention utilizes a worm gear and worm wheel for power transmission, causing the transmission pin to rotate the adjusting block. The fine-pitch thread on the outer side of the adjusting block meshes with the thread on the upper cover, achieving vertical lifting and lowering, thus realizing high-precision adjustment. The worm gear transmission ratio design significantly expands the stroke range, allowing it to adapt to significantly uneven ground conditions without the need for shims. Furthermore, the leveling concave surface on the top of the adjusting block cooperates with the leveling convex spherical surface on the bottom of the cover to automatically compensate for angular deviations between the equipment and the foundation, ensuring even load distribution. After adjustment, the adjusting worm gear is locked by tightening the lock nut, completely eliminating transmission backlash and ensuring long-term stability. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal transmission structure connection of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the pad base of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the upper cover plate of this utility model;

[0020] Figure 5 This is a schematic diagram of the adjusting worm and worm gear transmission state of this utility model;

[0021] Figure 6 This is a schematic diagram of the matching structure of the leveling protrusion and the leveling concave surface of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the adjustment block of this utility model.

[0023] In the diagram: 1. Support cover; 2. Adjusting block; 3. Upper cover plate; 4. Shim base; 5. Adjusting worm gear; 6. Worm wheel; 7. Locking nut; 8. Fixing screw; 101. Leveling protrusion; 201. Leveling concave surface; 202. Transmission square groove; 301. Upper cover thread; 302. Front pressure plate; 303. Rear pressure plate; 501. Locking thread; 601. Transmission pin. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] Please see Figure 1-7 As shown, a high-precision, long-stroke adjusting shim includes a shim base 4, with an upper cover plate 3 fixed to the top of the shim base 4. A transmission assembly is installed in the inner cavity of the shim base 4. The transmission assembly includes an adjusting worm gear 5 and a worm wheel 6, whose rotation center lines are in a staggered cross shape. The adjusting worm gear 5 and the worm wheel 6 are meshed and transmitted. An adjusting block 2 is coaxially fixed to the top of the worm wheel 6. The adjusting block 2 can move up and down relative to the upper cover plate 3. A support cover 1 is placed on the top of the adjusting block 2.

[0026] Specifically, the rotation center line of the worm gear 6 is set vertically, and the bottom of the inner cavity of the pad base 4 is provided with a worm gear positioning groove. The worm gear 6 is installed in the worm gear positioning groove around its center line. U-shaped grooves are opened on the opposite side walls of the pad base 4. The central shaft of the adjusting worm 5 is supported at the bottom of the U-shaped groove. The corresponding front pressure plate 302 and rear pressure plate 303 are provided on the corresponding side of the upper cover plate 3. They are inserted into the corresponding two U-shaped grooves to limit the central shaft of the adjusting worm 5.

[0027] One end of the central shaft of the adjusting worm 5 extends through the base 4 to the outside. The central shaft located outside the base 4 is provided with a locking thread 501, and the corresponding end of the central shaft is provided with a wrench action boss. A locking nut 7 is connected to the external thread of the locking thread 501, and a washer is provided between the locking nut 7 and the base 4. After the adjusting worm 5 is adjusted, the rotational freedom of the adjusting worm 5 is restricted by the locking nut 7 to achieve the positioning of the adjusting block 2.

[0028] A transmission pin 601 is coaxially fixed to the top of the worm gear 6, and a transmission square groove 202 is provided at the bottom of the adjusting block 2. The transmission pin 601 is slidably disposed in the transmission square groove 202. The outer peripheral sidewall of the adjusting block 2 is provided with fine thread, which is threadedly connected to the upper cover thread 301 provided at the corresponding position on the upper cover plate 3. Thus, the rotation of the worm gear 6 can be transmitted through the transmission pin 601, causing the adjusting block 2 to rotate relative to the upper cover plate 3. In turn, the adjusting block 2 is driven to move upward or downward relative to the upper cover plate 3 through the thread transmission.

[0029] More specifically, both the base plate 4 and the top cover plate 3 are made of cast iron, and the top edge of the top cover plate 3 has multiple through holes, in which fixing screws 8 are installed to fix the top cover plate 3 and the base plate 4 together.

[0030] Furthermore, the top of the adjusting block 2 is provided with a leveling concave surface 201, and the bottom of the cover 1 is provided with a corresponding leveling protrusion 101; the cover 1 is placed on top of the adjusting block 2, so that the adjusting protrusion 101 and the leveling concave surface 201 cooperate to match the installation angle between the equipment and the foundation for adjustment, so that the equipment is placed stably; the top of the cover 1 is provided with anti-slip texture to increase the friction between it and the supporting equipment.

[0031] When this utility model is in use, when the equipment is placed on the pad, the support cover 1, under the pressure of the equipment, achieves self-leveling by engaging the leveling protrusion 101 and the leveling concave surface 20 at the bottom to compensate for the angular deviation between the equipment and the installation foundation. Loosen the locking nut 7, then use a wrench to hold the wrench action boss and apply torque, thereby causing the adjusting worm 5 to rotate. The worm wheel 6 rotates under meshing transmission, thereby driving the adjusting block 2 to engage with the upper cover thread 301 on the upper cover plate 3, causing the adjusting block 2 to move up or down, thereby adjusting the height position of the top support cover 1. After the adjustment is completed, tighten the locking nut 7 again to fix the position.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-precision, long-stroke adjusting shim, characterized in that, It includes a base plate (4) and a top cover plate (3) fixed to its top. The base plate (4) has a transmission assembly in its inner cavity. The transmission assembly includes an adjusting worm (5) and a worm wheel (6) that mesh with each other. The upper cover plate (3) is provided with an upper cover thread (301). An adjustment block (2) is provided in the inner thread of the locking thread (301). A transmission square groove (202) is provided at the bottom of the adjustment block (2). A transmission pin (601) is coaxially fixed at the top of the worm gear (6). The transmission pin (601) is slidably disposed in the transmission square groove (202). The worm gear (6) is driven to rotate by rotating the adjusting worm (5), and the adjustment block (2) is driven to rotate and rise or fall relative to the upper cover plate (3).

2. The high-precision, long-stroke adjusting shim according to claim 1, characterized in that, The opposite sidewalls of the pad base (4) are provided with U-shaped grooves. The central shaft of the adjusting worm (5) is mounted at the bottom of the U-shaped groove. The bottom of the upper cover plate (3) is provided with a front pressure plate (302) and a rear pressure plate (303), which are inserted into the U-shaped groove to limit the adjustment worm (5).

3. The high-precision, long-stroke adjusting shim according to claim 1, characterized in that, The top of the adjustment block (2) is provided with a cover (1), the top of the adjustment block (2) is provided with a leveling concave surface (201), and the bottom of the cover (1) is provided with a matching leveling protrusion (101).

4. A high-precision, long-stroke adjusting shim according to claim 3, characterized in that, The top of the cover (1) is provided with anti-slip texture.

5. A high-precision, long-stroke adjusting shim according to claim 1, characterized in that, The end of the adjusting worm (5) extending from the central shaft to the outside of the pad base (4) is provided with a wrench-like boss.

6. A high-precision, long-stroke adjusting shim according to claim 1, characterized in that, The central shaft of the adjusting worm (5) is provided with a locking thread (501) on a section of its outer periphery outside the base plate (4). A locking nut (7) is provided outside the locking thread (501) to cooperate with it. A washer is provided between the locking nut (7) and the base plate (4).

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