CN220694679U - Mounting structure of lifting upright post travel control assembly - Google Patents

Abstract

The utility model discloses a mounting structure of a lifting upright post stroke control assembly, wherein at least one strip-shaped guide rail is fixed on the outer circumference of a round supporting tube, an upper limit stroke positioning block and a lower limit stroke positioning block are both mounted on the strip-shaped guide rail, a stroke control seat fixed on the inner wall of a lifting tube is in sliding fit with the strip-shaped guide rail, and a contact block of the upper limit stroke positioning block, a contact block of a stroke switch of the stroke control seat and a contact block of the lower limit stroke positioning block are all on the same straight line; the strip-shaped guide rail and the bottom end plate are provided with a circumferential limiting structure; the two long-strip-shaped guide rails are symmetrically distributed on the outer circumference of the round support tube. The contact block of the upper limit stroke positioning block on the outer circumference of the round supporting tube, the contact block of the stroke switch of the stroke control seat and the contact block of the lower limit stroke positioning block of the mounting structure can be always on the same straight line, and the bottom end plate and the round supporting tube can be circumferentially limited to improve the stroke control precision.

Description

Mounting structure of lifting upright post travel control assembly

Technical Field

The utility model relates to the technical field of lifting upright posts, in particular to a mounting structure of a lifting upright post travel control assembly.

Background

The stroke control assembly of the lifting column is generally mounted on the outer wall of the support tube outside the screw rod in the nut screw rod pair and on the inner wall of the lifting tube, the support tube is detachably connected with one end plate such as a bottom end plate, and the bottom end plate is generally used for being detachably connected with the bottom foot plate of the electric lifting table. The lifting column stroke control assembly generally comprises an upper limit stroke positioning block, a lower limit stroke positioning block and a stroke control seat, wherein the stroke control seat is fixed on the inner wall of a lifting tube, under the driving of a driving mechanism, for example, a motor drives a screw rod in a screw rod pair to rotate through a gear box, the screw rod drives a nut fixed with the lifting tube to lift, the stroke control seat lifts along with the lifting of the lifting tube, after a contact of a stroke switch on the stroke control seat is contacted with a contact on the upper limit stroke positioning block, the lifting tube is up ended, and after a contact of a stroke switch on the stroke control seat is contacted with a contact block on the lower limit stroke positioning block, the lifting tube is down ended.

However, the mounting structure of the stroke control assembly of the lifting upright post in the prior art still has the following defects:

1. because the supporting tube generally adopts a round tube, in the installation process, the contact blocks of the upper limit stroke positioning block and the lower limit stroke positioning block on the outer circumference of the round tube are difficult to be on the same straight line with the contact blocks of the stroke switch of the stroke control seat, such as the contact blocks of the upper stroke switch and the contact blocks of the lower stroke switch, and the risk of failure of stroke control exists all the time in the follow-up long-term use process.

2. The stroke control seat is fixed on the inner wall of the lifting tube, and the contact block of the upper limit stroke positioning block, the contact of the stroke switch of the stroke control seat, such as the contact of the upper limit stroke switch and the contact block of the lower limit stroke switch, are required to be always kept on the same straight line, which is required to be formed by the up-and-down walking of the contact of the stroke switch of the stroke control seat fixed on the inner wall of the lifting tube, such as the contact of the upper limit stroke switch and the contact of the lower limit stroke switch, are required to be always on the same straight line, however, the installation structure of the stroke control assembly of the lifting upright post in the prior art cannot ensure the same point. Because the bottom end plate is limited with the fixed pipe circumference of the upright post, the fixed pipe is limited with the lifting pipe circumference, but because the round end head of the round supporting pipe is connected with the bottom end inner wall of the round supporting pipe by external and internal threads in a screwing way, the circumferential limitation between the bottom end plate and the round supporting pipe in the prior art is difficult.

3. Because the round end head and the bottom end plate are screwed into the threaded holes of the end plate of the round end head through a plurality of screws penetrating through the through holes of the bottom end plate to be mutually screwed and fixed, and the circumferential positions of the round end head and the round supporting tube are random when the round end head and the round supporting tube are screwed, the prior art is difficult to ensure that the plurality of the through holes of the bottom end plate are in one-to-one correspondence with the plurality of the threaded holes of the end plate of the round end plate, and great difficulty is caused to installation.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an installation structure of a lifting upright post stroke control assembly, wherein the contact block of an upper limit stroke positioning block, the contact block of a stroke switch of a stroke control seat and the contact block of a lower limit stroke positioning block on the outer circumference of a circular support tube can be always on the same straight line, and a bottom end plate and the circular support tube can be circumferentially limited to improve the stroke control precision.

The technical scheme of the utility model is that the installation structure of the lifting upright post stroke control assembly is provided, at least one strip-shaped guide rail is fixed on the outer circumference of a round supporting tube, an upper limit stroke positioning block and a lower limit stroke positioning block are both installed on the strip-shaped guide rail, a stroke control seat fixed on the inner wall of the lifting tube is in sliding fit with the strip-shaped guide rail, and a contact block of the upper limit stroke positioning block, a contact of a stroke switch of the stroke control seat and a contact block of the lower limit stroke positioning block are all on the same straight line; the strip-shaped guide rail and the bottom end plate are provided with a circumferential limit structure.

After adopting the structure, the installation structure of the lifting upright post travel control assembly has the following advantages:

because the outer circumference of the round supporting tube is fixed with at least one strip-shaped guide rail, the upper limit stroke positioning block and the lower limit stroke positioning block are both arranged on the strip-shaped guide rail, and the stroke control seat fixed on the inner wall of the lifting tube is in sliding fit with the strip-shaped guide rail, in the installation process, the contact block of the upper limit stroke positioning block and the contact block of the lower limit stroke positioning block which are fixed on the strip-shaped guide rail and the contact block of the stroke switch of the stroke control seat in sliding fit with the strip-shaped guide rail can be completely kept on the same straight line, and the stroke control precision of the contact block can still be always kept on the same straight line in the subsequent long-term use process, thereby preventing the risk of failure of stroke control.

Because the arrangement of the strip-shaped guide rail can utilize the lower end of the strip-shaped guide rail to increase the circumferential limit structure between the strip-shaped guide rail and the bottom end plate, and because the strip-shaped guide rail is fixedly connected with the circular support pipe, the strip-shaped guide rail and the bottom end plate are provided with the circumferential limit structure, and the circular support pipe is provided with the circumferential limit structure, so that the bottom end plate and the circular support pipe are circumferentially limited, the contact of the stroke switch of the stroke control seat fixed on the lifting pipe is effectively ensured to be in the same straight line with the contact block of the upper limit stroke positioning block and the contact block of the lower limit stroke positioning block fixed on the strip-shaped guide rail all the time, the stroke control precision is further ensured, the risk of stroke control failure is prevented or even avoided, and the flexibility, the stability and the reliability of the operation of the stroke control assembly of the lifting upright post are effectively ensured.

Further, the axis of the contact block of the upper limit stroke positioning block, the axis of the contact of the upper stroke switch of the stroke control seat, the axis of the contact of the lower stroke switch and the axis of the contact block of the lower limit stroke positioning block are all on the same straight line. After adopting above specific structure, still further guarantee its stroke control precision to prevent even avoid the risk of stroke control inefficacy, and more effectively guarantee the technical effect of the flexibility, the stability and the reliability of lift stand stroke control assembly operation.

Further, the circumferential limiting structure is a limiting block which is fixed at the bottom end of the strip-shaped guide rail and partially protrudes downwards from the bottom end face of the circular supporting pipe, and the lower protruding part of the limiting block is sleeved in the limiting hole of the bottom end plate so that the circular supporting pipe and the bottom end plate are circumferentially limited. After the circumferential limiting structure adopts the specific structure, the structure is simple, the connection or the disassembly is convenient, and the circumferential limiting is stable and reliable.

Further, the limiting hole is a rectangular hole, and the cross section of the lower convex part of the positioning block sleeved with the rectangular limiting hole is rectangular. After the structure is adopted, the circumferential limiting effect is better.

Further, the two long-strip-shaped guide rails are symmetrically distributed on the outer circumference of the round supporting tube, and the upper limit stroke positioning block and the lower limit stroke positioning block are circular blocks and are in threaded connection and fixed with the two long-strip-shaped guide rails through respective screws; the stroke control seat is an annular cylinder with the same cross section shape as the lifting tube, two groove blocks are arranged on the inner wall of the annular cylinder, and respective grooves such as rectangular grooves on each groove block are sleeved and in sliding fit on respective long-strip-shaped guide rails such as rectangular guide rails. After the structure is adopted, the distribution of the strip-shaped guide rail is more reasonable, the connection firmness of the upper limit stroke positioning block and the lower limit stroke positioning block with the strip-shaped guide rail is better, the axial stroke position of the upper limit stroke positioning block and the lower limit stroke positioning block on the round supporting tube is more convenient and quicker to adjust, the sliding fit of the stroke control seat and the two strip-shaped guide rails is more flexible, more stable and more reliable, all contacts are always on the same straight line with the contact blocks in the operation process, the stroke control precision of the contacts is ensured, and therefore, the technical effect of even avoiding the risk of failure of the stroke control is prevented.

Further, the lifting pipe and the fixed pipe sleeved with the lifting pipe are rectangular pipes; the bottom end plate is a rectangular end plate matched with the shape of the fixed pipe; the annular cylinder is a rectangular cylinder matched with the shape of the lifting pipe. After the structure is adopted, the rectangular cylinder and the lifting tube are more convenient and firmer to fix; the rectangular lifting tube and the fixed tube are in flexible sliding fit, the circumferential limiting effect of the rectangular lifting tube and the fixed tube is better, and the fixed tube and the bottom end plate are connected more firmly and positioned circumferentially better; the technical effect of circumferential limit of the rectangular end plate and the round support tube is better.

Further, the cross section of the strip-shaped guide rail is rectangular. After the structure is adopted, the connection between the strip-shaped guide rail and the upper limit stroke positioning block and the connection between the strip-shaped guide rail and the lower limit stroke positioning block are firmer and more reliable, the sliding fit between the strip-shaped guide rail and the groove of the stroke control seat are more flexible, more stable and more reliable, and the technical effects that all contacts are always in the same straight line with the contact block in the operation process and the stroke control precision of the contacts is ensured are further ensured.

Further, two crescent long through holes capable of circumferentially sliding around the respective locking screws are formed in the bottom end plate, and the two crescent long through holes are symmetrically arranged relative to the center point of the bottom end plate. After the structure is adopted, although the circumferential position of the circular end and the circular supporting tube still has randomness when the circular end is screwed, the threaded hole on the end face of the circular end rotates to any position in the crescent long through hole, and the respective locking screw in the two crescent long through holes can still accurately align with the threaded hole and then be screwed in the threaded hole, so that the bottom end plate and the circular end are conveniently, easily and quickly screwed, and the installation is convenient, simple and reliable.

Drawings

Fig. 1 is a schematic view of the structure of the lifting column profile applied to the mounting structure of the present utility model.

Fig. 2 is a schematic view of the structure of fig. 1 with the fixing tube omitted.

Fig. 3 is a schematic view of the structure of fig. 1 with the fixing tube and the lifting tube omitted.

Fig. 4 is an enlarged schematic view of the structure of fig. 3 a.

Fig. 5 is a schematic view of the upper limit stroke positioning block, the upper limit stroke switch, the lower limit stroke switch, and the lower limit stroke positioning block of the mounting structure shown in fig. 1 (screws are not shown, and the same applies to fig. 6).

Fig. 6 is an enlarged schematic view of the structure of fig. 5B.

Fig. 7 is an enlarged schematic view of the structure of fig. 5C.

Fig. 8 is a schematic top view of the stroke control seat in the mounting structure of the present utility model.

Fig. 9 is a schematic view of a bottom enlarged structure of the bottom end plate of fig. 1.

The figure shows: 1. the device comprises a fixed tube, 2, a lifting tube, 3, a motor, 4, a bottom end plate, 5, a lower limit stroke positioning block, 6, a first through hole, 7, a long strip guide rail, 8, a round supporting tube, 9, an upper limit stroke positioning block, 10, a screw rod, 11, a gear box, 12, a stroke control seat, 13, a second through hole, 14, a contact of an upper stroke switch, 15, an upper stroke switch, 16, a lower stroke switch, 17, a contact of a lower stroke switch, 18, a groove block, 19, a stroke switch mounting plate, 20, a groove, 21, a locking screw, 22, a crescent long through hole, 23, a limiting hole, 24, a limiting block, 25, a contact block of the upper limit stroke positioning block, 26 and a contact block of the lower limit stroke positioning block.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings. It should be noted that the description of these embodiments is for aiding in understanding the present utility model, but is not to be construed as limiting the utility model. In addition, the technical features described in the following embodiments of the present utility model may be combined with each other as long as they do not collide with each other.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9.

In the prior art, under the driving of a driving mechanism, if a motor 3 drives a screw rod 10 in a screw rod pair of a nut through a gear box 11 to rotate, the screw rod 10 drives a nut fixed with a lifting tube 2 and the lifting tube 2 to lift, a stroke control seat 12 lifts along with the lifting of the lifting tube 2, when a contact of a stroke switch on the stroke control seat 12 touches a contact block 25 of an upper limit stroke positioning block, the lifting tube 2 is terminated in an upward direction, and when a contact of the stroke switch on the stroke control seat 12 touches a contact block 26 of a lower limit stroke positioning block, the lifting tube 2 is terminated in a downward direction. Four through holes, such as four first through holes 6, are formed in four corners of the bottom end plate 4, which will be described below, and are used for threading screws to lock the bottom end plate 4 and the bottom foot plate of the electric lifting table.

According to the installation structure of the lifting column stroke control assembly, at least one strip-shaped guide rail 7 is fixed on the outer circumference of a round supporting tube 8, an upper limit stroke positioning block 9 and a lower limit stroke positioning block 5 are both installed on the strip-shaped guide rail 7, a stroke control seat 12 fixed on the inner wall of a lifting tube 2 is in sliding fit with the strip-shaped guide rail 7, and a contact block 25 of the upper limit stroke positioning block, a contact of a stroke switch of the stroke control seat 12, such as a contact 14 of an upper stroke switch, a contact 17 of a lower stroke switch and a contact block 26 of the lower limit stroke positioning block are all on the same straight line. The strip-shaped guide rail 7 and the bottom end plate 4 are provided with circumferential limiting structures. The circular support tube 8 is typically an aluminum tube.

The axis of the contact block 25 of the upper limit stroke positioning block, the axis of the contact 14 of the upper stroke switch of the stroke control seat 12, the axis of the contact 17 of the lower stroke switch and the axis of the contact block 26 of the lower limit stroke positioning block are all on the same straight line. It is not easy to understand; the axis of the round contact of the travel switch is well understood, namely the center line, and the center line extends along the height direction of the round contact, namely the axis. The axis of the contact block 25 of the upper limit stroke positioning block and the axis of the contact block 26 of the lower limit stroke positioning block can be understood as central lines as well, and as shown in fig. 5 and 6, the contact blocks 25 of the upper limit stroke positioning block and the contact blocks 26 of the lower limit stroke positioning block are rectangular columns, the intersection point of the bisector of the width and the bisector of the length of the rectangular columns, namely, the central line, and the central line extends along the height direction of the rectangular columns, namely, the central line is the axis. Contacts on the travel switch, such as contact 14 of the upper travel switch and contact 17 of the lower travel switch, are also referred to as contacts.

The same straight line is like a plumb line.

The circumferential limiting structure is preferably a limiting block 24 fixed at the bottom end of the strip-shaped guide rail 7 and partially protruding downwards from the bottom end surface of the circular supporting tube 8, and the lower protruding part of the limiting block 24 is partially sleeved in the limiting hole 23 of the bottom end plate 4 so as to limit the circular supporting tube 8 and the bottom end plate 4 in the circumferential direction.

The limiting hole 23 is preferably a rectangular hole, and the cross section of the lower convex part of the limiting block 24 sleeved with the rectangular limiting hole 23 is preferably rectangular.

The circumferential limiting structure can also be that the bottom end of the strip-shaped guide rail downwards protrudes from the bottom end surface of the circular support pipe, and the downwards protruding bottom end is sleeved in the limiting hole of the bottom end plate so that the circular support pipe and the bottom end plate are circumferentially limited. The cross section of the bottom end of the downward bulge of the strip-shaped guide rail sleeved with the rectangular limiting hole is also rectangular.

The two long strip guide rails 7 are preferably symmetrically distributed on the outer circumference of the round support tube 8, and the upper limit stroke positioning block 9 and the lower limit stroke positioning block 5 are preferably circular ring-shaped blocks and are both in threaded connection and fixed with the two long strip guide rails 7 through respective screws. If two screws pass through two through holes such as a second through hole 13 on the upper limit stroke positioning block 9, the screws are screwed in respective threaded holes at the tops of the two strip-shaped guide rails 7; two screws pass through two through holes such as a second through hole 13 on the lower limit stroke positioning block 5 and are screwed in respective threaded holes at the bottoms of the two strip-shaped guide rails 7. Of course, considering that the upper limit position and the lower limit position are adjustable, the top of the two elongated rails 7 may have a plurality of threaded holes, which extend along the length direction of the elongated rails 7, and the bottom of the two elongated rails 7 may have a plurality of threaded holes, which also extend along the length direction of the elongated rails 7. The stroke control seat 12 is preferably an annular cylinder with the same cross-sectional shape as the lifting tube 2, and two groove blocks 18 are arranged on the inner wall of the annular cylinder, and a respective groove 20 on each groove block 18 is sleeved on and slidingly matched with a respective strip-shaped guide rail 7. The upper travel switch 15 and the lower travel switch 16 can be screwed and fixed with a travel switch mounting plate 19 fixed on the inner wall of the annular cylinder by a plurality of screws, such as welding or screw screwing.

The lifting pipe 2 and the fixed pipe 1 sleeved with the lifting pipe 2 can be rectangular pipes. The bottom end plate 4 may be a rectangular end plate matching the shape of the fixed tube 1. The annular cylinder can be a rectangular cylinder matched with the shape of the lifting pipe 2.

The cross section of the strip-shaped guide rail 7 is preferably rectangular. The cross section of the whole length of the limiting block 24 is rectangular, but the thickness can be different, and the part inserted into the limiting hole 23 can be thinner. It will be appreciated that after the two elongated guide rails 7 are fixed, only one of the elongated guide rails 7 and the bottom end plate 4 need be provided with a circumferential limiting device.

The long-strip-shaped guide rail 7 and the round support pipe 8 can be fixed by a plurality of countersunk screws, and the long-strip-shaped guide rail 7 and the round support pipe 8 can be integrally formed by one-time processing.

The bottom end plate 4 is provided with two crescent long through holes 22 which can circumferentially slide around the respective locking screws 21, and the two crescent long through holes 22 are symmetrically arranged relative to the center or center point of the bottom end plate 4. Crescent-shaped elongated through holes 22 may also be referred to as kidney-shaped elongated through holes.

The above-noted components or structures or numbers are not shown in the figures. The drawings are schematic only, and the text descriptions will be followed if the drawings do not coincide with the text descriptions or if the drawings do not coincide with each other.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The utility model provides a mounting structure of lift stand stroke control subassembly which characterized in that: at least one strip-shaped guide rail is fixed on the outer circumference of the round supporting tube, an upper limit stroke positioning block and a lower limit stroke positioning block are both arranged on the strip-shaped guide rail, a stroke control seat fixed on the inner wall of the lifting tube is in sliding fit with the strip-shaped guide rail, and a contact block of the upper limit stroke positioning block, a contact block of a stroke switch of the stroke control seat and a contact block of the lower limit stroke positioning block are all on the same straight line; the strip-shaped guide rail and the bottom end plate are provided with a circumferential limit structure.

2. The mounting structure of a lift column stroke control assembly of claim 1, wherein: the axis of the contact block of the upper limit stroke positioning block, the axis of the contact of the upper stroke switch of the stroke control seat, the axis of the contact of the lower stroke switch and the axis of the contact block of the lower limit stroke positioning block are all on the same straight line.

3. The mounting structure of a lift column stroke control assembly of claim 1, wherein: the circumferential limiting structure is a limiting block which is fixed at the bottom end of the strip-shaped guide rail and partially protrudes downwards from the bottom end face of the circular supporting pipe, and the lower protruding part of the limiting block is sleeved in the limiting hole of the bottom end plate so that the circular supporting pipe and the bottom end plate are circumferentially limited.

4. The mounting structure of a lift column stroke control assembly of claim 3, wherein: the limiting holes are rectangular holes, and the cross section of the lower convex part of the positioning block sleeved with the rectangular limiting holes is rectangular.

5. The mounting structure of a lift column stroke control assembly of claim 1, wherein: the upper limit stroke positioning block and the lower limit stroke positioning block are circular blocks and are in threaded connection and fixed with the two strip-shaped guide rails through respective screws; the stroke control seat is an annular cylinder with the same cross section shape as the lifting tube, two groove blocks are arranged on the inner wall of the annular cylinder, and the grooves on each groove block are sleeved and in sliding fit with the long-strip-shaped guide rails.

6. The mounting structure of a lift column stroke control assembly of claim 5, wherein: the lifting pipe and the fixed pipe sleeved with the lifting pipe are rectangular pipes; the bottom end plate is a rectangular end plate matched with the shape of the fixed pipe; the annular cylinder is a rectangular cylinder matched with the shape of the lifting pipe.

7. The mounting structure of the lift column stroke control assembly according to claim 1 or 3 or 5, wherein: the cross section of the strip-shaped guide rail is rectangular.

8. The mounting structure of a lift column stroke control assembly of claim 1, wherein: two crescent long through holes capable of circumferentially sliding around the respective locking screws are formed in the bottom end plate and are symmetrically arranged relative to the center point of the bottom end plate.