Jack for subway construction trolley

Abstract

The invention discloses a jack for a subway construction trolley, and relates to the field of subway construction. Comprising a base and jacks; the jack is vertically arranged and is connected to the base; a jack output shaft is upwards connected with a strut; the top end of the strut is connected with a horizontal bearing plate; the device further comprises left and right supporting mechanisms. The supporting mechanism comprises a sleeve and a movable rod; the bottom end of the sleeve is connected to the base; the top end of the movable rod is connected to the lower portion of the horizontal bearing plate, and the lower portion of the movable rod is sleeved with the sleeve. Protruding parts are arranged on the front side and the rear side of the lower portion of the sleeve, and a plurality of horizontal springs are arranged on the inner walls of the protruding parts and connected with horizontal blocks. The jack is started to jack the subway construction trolley; when the jack breaks down, the movable rod moves upwards along with the jack, the horizontal block pops up and is folded under the action of resilience force of the horizontal spring, and the folded horizontal block stops descending of the movable rod, so that when the jack breaks down, the folded horizontal block can still prevent the movable rod from descending, and the trolley is prevented from falling.

Description

Technical Field

[0001] The invention relates to the field of subway construction, and in particular to a jack used for a subway construction trolley. Background Art

[0002] The subway is an urban rail transit system that usually operates underground in the city to facilitate short-distance travel for citizens. During the subway construction process, a trolley is used as the bottom support when pouring the main roof of the subway; after the trolley reaches the construction location, a jack is generally used to lift and lower the trolley. However, traditional jacks do not have a self-locking function and cannot automatically self-lock the jack after the lifting operation is completed. Therefore, if the jack fails, the trolley will fall, causing serious safety hazards. Summary of the invention

[0003] The purpose of the present invention is to provide a jack for a subway construction trolley, so as to solve the problem that the existing jack for the subway construction trolley has no self-locking function and cannot prevent the trolley from falling when the jack fails.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows: A jack for a subway construction trolley comprises a base and a jack; the jack is arranged vertically and connected to the base; a support is connected to the output shaft of the jack, and a horizontal bearing plate is connected to the top of the support; the horizontal bearing plate is used to support the subway construction trolley; It also includes two left and right support mechanisms; the support mechanism includes a sleeve and a movable rod; the sleeve is arranged vertically, and the bottom end of the sleeve is connected to the base; the top end of the movable rod is connected to the lower part of the horizontal bearing plate, and the lower part of the movable rod is sleeved in the sleeve; the lower part of the sleeve is provided with protrusions on both the front and rear sides thereof, and the inner wall of the protrusion is provided with a plurality of horizontal springs from top to bottom, and the horizontal springs are connected with horizontal blocks, and the upper and lower adjacent horizontal blocks are fitted with each other; the front and rear horizontal blocks respectively abut the front and rear sides of the movable rod under the action of the horizontal springs; When the jack output shaft extends upward, driving the support and the horizontal bearing plate to move upward to lift the subway construction trolley, the movable rod also moves upward, so that the horizontal blocks that no longer abut the front and rear sides of the movable rod pop out under the rebound force of the horizontal spring to prevent the movable rod from descending.

[0005] Furthermore, the top of the movable rod is rotatably connected to the lower part of the horizontal bearing plate, and the lower part of the movable rod is provided with inclined slide grooves on two symmetrical sides, and the surface of the inclined slide grooves is an arc surface; the end of the horizontal block abutting the movable rod is hemispherical; When the movable rod is rotated until the symmetrical inclined slot is rotated to the front-back direction, the hemispherical end of the horizontal block is stuck in the inclined slot. Under the gravity of the subway construction trolley, the lower part of the movable rod overcomes the resistance of the horizontal block through the inclined slot, so that the movable rod descends; When the movable rod needs to stop descending, the movable rod is rotated again to make the inclined slide groove leave the front-rear direction along the hemispherical end of the horizontal block.

[0006] Furthermore, a rotary drive is connected to the pillar; the turntable of the rotary drive is connected to a driving wheel; the movable rod sleeve is provided with a driven wheel; the driving wheel is connected to the left and right driven wheels through a horizontal transmission belt.

[0007] Furthermore, a plurality of stiffening plates are provided between the support pillars and the horizontal bearing plate.

[0008] Furthermore, it also includes a distance measuring sensor; the distance measuring sensor is connected to the base; and the distance measuring sensor is aligned with the horizontal bearing plate.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The base is placed on the ground, and the horizontal bearing plate supports the subway construction trolley; the jack is started, and the output shaft of the jack extends upward, driving the pillar and the horizontal bearing plate to move upward, thereby lifting the subway construction trolley; in this process, the movable rod also moves upward, so that the horizontal blocks that no longer abut the front and rear sides of the movable rod pop out and close under the action of the rebound force of the horizontal spring, and the closed horizontal blocks block the descent of the movable rod, realizing the self-locking function, so that when the jack fails, the closed horizontal blocks can still prevent the movable rod from descending, thereby preventing the trolley from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an overall schematic diagram of the present invention.

[0011] Figure 2 It is a schematic cross-sectional view of the sleeve.

[0012] Figure 3 It is a partial bottom view schematic diagram of the present invention.

[0013] The meanings of the numbers in the figure are as follows: 1. base; 2. jack; 3. pillar; 4. horizontal bearing plate; 5. sleeve; 6. movable rod; 7. horizontal block; 8. horizontal spring; 9. rotary drive; 10. driving wheel; 11. driven wheel; 12. horizontal transmission belt; 13. stiffening plate; 14. distance measuring sensor; 15. fixed seat; 16. first warning light; 17. second warning light; 18. inclined slide. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings and specific implementation methods. The described embodiment is one embodiment of the present invention, and the present invention may also have other implementation methods.

[0015] Example: See also Figure 1~Figure 2 The present invention discloses a jack for a subway construction trolley, comprising a base 1 and a jack 2; the jack 2 is arranged vertically and connected to the base 1; a support 3 is connected to the output shaft of the jack 2, and a horizontal bearing plate 4 is connected to the top of the support 3; the horizontal bearing plate 4 is used to support the subway construction trolley; It also includes two left and right support mechanisms; the support mechanism includes a sleeve 5 and a movable rod 6; the sleeve 5 is arranged vertically, and the bottom end of the sleeve 5 is connected to the base 1; the top end of the movable rod 6 is connected to the lower part of the horizontal bearing plate 4, and the lower part of the movable rod 6 is sleeved in the sleeve 5; the lower part of the sleeve 5 is provided with protrusions on both the front and rear sides thereof, and the inner wall of the protrusion is provided with a plurality of horizontal springs 8 from top to bottom, and the horizontal springs 8 are connected with horizontal blocks 7, and the upper and lower adjacent horizontal blocks 7 are fitted with each other; the front and rear horizontal blocks 7 are respectively abutted against the front and rear sides of the movable rod 6 under the action of the horizontal springs 8; When the output shaft of the jack 2 extends upward, driving the support 3 and the horizontal bearing plate 4 to move upward to lift the subway construction trolley, the movable rod 6 also moves upward, so that the horizontal block 7 that no longer abuts the front and rear sides of the movable rod 6 pops out under the action of the rebound force of the horizontal spring 8 to prevent the movable rod 6 from descending.

[0016] In this embodiment, the base 1 is placed on the ground, and the horizontal bearing plate 4 supports the subway construction trolley; the jack 2 is started, and the output shaft of the jack 2 extends upward, driving the pillar 3 and the horizontal bearing plate 4 to move upward, thereby lifting the subway construction trolley; during this process, the movable rod 6 also moves upward, so that the horizontal block 7 that no longer abuts the front and rear sides of the movable rod 6 pops up and closes under the rebound force of the horizontal spring 8, and the closed horizontal block 7 blocks the descent of the movable rod 6, realizing the self-locking function, so that when the jack 2 fails, the closed horizontal block 7 can still prevent the movable rod 6 from descending, thereby preventing the trolley from falling. The left and right support mechanisms jointly support the horizontal bearing plate 4, and the force is evenly distributed.

[0017] As a preferred embodiment, see Figure 2 The top of the movable rod 6 is rotatably connected to the lower part of the horizontal bearing plate 4. The lower part of the movable rod 6 is provided with inclined slide grooves 18 on both sides symmetrically. The surface of the inclined slide grooves 18 is an arc surface. The end of the horizontal block 7 abutting against the movable rod 6 is hemispherical. When the movable rod 6 is rotated until the symmetrical inclined slot 18 is rotated to the front-back direction, the hemispherical end of the horizontal block 7 is inserted into the inclined slot 18. Under the gravity of the subway construction trolley, the lower part of the movable rod 6 overcomes the resistance of the horizontal block 7 through the inclined slot 18, thereby causing the movable rod 6 to descend. When the movable rod 6 needs to stop descending, the movable rod 6 is rotated again, so that the inclined slide groove 18 moves away from the front-rear direction along the hemispherical end of the horizontal block 7.

[0018] In this embodiment, in the initial state, the symmetrical inclined chute 18 is not in the front-to-back direction, and the jack 2 completes the lifting of the subway construction trolley. When the operator wants to lower the height of the subway construction trolley, the movable rod 6 is rotated until the symmetrical inclined chute 18 is rotated to the front-to-back direction, and the hemispherical end of the horizontal block 7 is inserted into the inclined chute 18. Under the gravity of the subway construction trolley, the lower part of the movable rod 6 overcomes the resistance of the horizontal block 7 through the inclined chute 18, so that the movable rod 6 is lowered, thereby driving the subway construction trolley to lower its height; when the subway construction trolley is lowered to the target height, the movable rod 6 is rotated again, so that the inclined chute 18 leaves the front-to-back direction along the hemispherical end of the horizontal block 7, so that the movable rod 6 stops descending and the subway construction trolley stops descending. The operator can use the existing methods of the prior art to realize the rotation of the movable rod 6.

[0019] As a preferred embodiment, see Figure 1 , Figure 3 The support 3 is connected to a rotary driver 9; the turntable of the rotary driver 9 is connected to a driving wheel 10; the movable rod 6 is provided with a driven wheel 11; the driving wheel 10 is connected to the left and right driven wheels 11 through a horizontal transmission belt 12.

[0020] In this embodiment, the rotary driver 9 is started, and the turntable of the rotary driver 9 rotates to drive the driving wheel 10 to rotate. The driving wheel 10 drives the left and right driven wheels 11 to rotate through the horizontal transmission belt 12, thereby rotating the left and right movable rods 6.

[0021] As a preferred embodiment, see Figure 1 , Figure 3 A plurality of stiffening plates 13 are provided between the pillars 3 and the horizontal bearing plate 4 .

[0022] In this embodiment, the stiffening plate 13 can improve the stability of the horizontal bearing plate 4 .

[0023] As a preferred embodiment, see Figure 1 , and also includes a distance sensor 14; the distance sensor 14 is connected to the base 1; the distance sensor 14 is aligned with the horizontal bearing plate 4.

[0024] In this embodiment, the distance sensor 14 is connected to the base 1 through the fixing seat 15; the distance sensor 14 measures the distance to the horizontal bearing plate 4, so as to judge whether the subway construction trolley has reached the set height. Specifically: the present invention also includes a first warning light 16 and a second warning light 17; the data measured by the distance sensor 14 is transmitted to the main control end, and the main control end judges the data; when the subway construction trolley is lifted to the set height, the first warning light 16 will be activated, and when it is not lifted to the set height, the second warning light 17 will be activated, so that it is convenient for personnel to judge the lifting operation status.

[0025] The terms “connection”, “fixation” and “docking” appearing in the description of the present invention may refer to fixed connection, processing and forming, welding or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0026] In the description of the present invention, the terms "inside", "upper", "lower", "end", "side", "outside", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A jack for a subway construction trolley, characterized in that: It comprises a base (1) and a jack (2); the jack (2) is arranged vertically and connected to the base (1); a support (3) is connected to the output shaft of the jack (2), and a horizontal bearing plate (4) is connected to the top of the support (3); the horizontal bearing plate (4) is used to support the subway construction trolley; It also includes two left and right support mechanisms; the support mechanism includes a sleeve (5) and a movable rod (6); the sleeve (5) is arranged vertically, and the bottom end of the sleeve (5) is connected to the base (1); the top end of the movable rod (6) is connected to the bottom of the horizontal bearing plate (4), and the bottom of the movable rod (6) is sleeved in the sleeve (5); the bottom of the sleeve (5) is provided with protrusions on both the front and rear sides thereof, and the inner wall of the protrusion is provided with a plurality of horizontal springs (8) from top to bottom, and the horizontal springs (8) are connected to horizontal blocks (7), and the upper and lower adjacent horizontal blocks (7) are fitted to each other; the front and rear horizontal blocks (7) respectively abut against the front and rear sides of the movable rod (6) under the action of the horizontal springs (8); When the output shaft of the jack (2) extends upward, driving the support (3) and the horizontal bearing plate (4) to move upward, thereby lifting the subway construction trolley, the movable rod (6) also moves upward, so that the horizontal block (7) that no longer abuts the front and rear sides of the movable rod (6) pops out under the action of the rebound force of the horizontal spring (8) to prevent the movable rod (6) from descending.

2. A jack for a subway construction trolley according to claim 1, characterized in that: The top of the movable rod (6) is rotatably connected to the bottom of the horizontal bearing plate (4), and the bottom of the movable rod (6) is provided with inclined slide grooves (18) on two symmetrical sides, and the surface of the inclined slide grooves (18) is an arc surface; one end of the horizontal block (7) abutting against the movable rod (6) is hemispherical; When the movable rod (6) is rotated until the symmetrical inclined chute (18) is rotated to the front-rear direction, the hemispherical end of the horizontal block (7) is inserted into the inclined chute (18), and under the gravity of the subway construction trolley, the lower part of the movable rod (6) overcomes the resistance of the horizontal block (7) through the inclined chute (18), thereby causing the movable rod (6) to descend; When the movable rod (6) needs to stop descending, the movable rod (6) is rotated again so that the inclined slide groove (18) moves away from the front-rear direction along the hemispherical end of the horizontal block (7).

3. A jack for a subway construction trolley according to claim 2, characterized in that: The support column (3) is connected to a rotary drive (9); the rotary disk of the rotary drive (9) is connected to a driving wheel (10); the movable rod (6) is provided with a driven wheel (11); the driving wheel (10) is connected to the left and right driven wheels (11) via a horizontal transmission belt (12).

4. The jack for a subway construction trolley according to claim 1, characterized in that: A plurality of stiffening plates (13) are provided between the pillars (3) and the horizontal bearing plate (4).

5. The jack for a subway construction trolley according to claim 1, characterized in that: It also includes a distance measuring sensor (14); the distance measuring sensor (14) is connected to the base (1); and the distance measuring sensor (14) is aligned with the horizontal bearing plate (4).

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