Hydraulic jack for jacking bridge

Abstract

The utility model relates to the technical field of hydraulic jacks, in particular to a hydraulic jack for jacking a bridge, which comprises a jack cylinder sleeve, a piston rod is arranged in the center of the top of the jack cylinder sleeve, a plurality of supporting columns are arranged on the top of the jack cylinder sleeve close to the edge, a plurality of clamping teeth are arranged on one side of each supporting column, and the clamping teeth are arranged on the other side of the jack cylinder sleeve. A plurality of sets of rotating devices are arranged on the outer wall of the jack cylinder sleeve, each rotating device comprises a gear, a bevel gear is arranged on one side of each gear, and a chain is arranged on each bevel gear. The clamping teeth are arranged on the supporting columns, the gears, the bevel gears and the chain are arranged on the jack cylinder sleeve, and the multiple second bevel gears are connected through the chain, so that synchronous rotation of all the gears is achieved, it is guaranteed that the supporting columns can ascend and descend synchronously, the supporting columns can stably support a bridge structure, and the jack has higher stability in the jacking process; and bridge deviation caused by failure of the hydraulic cylinder is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic jacks, in particular to a hydraulic jack used for bridge lifting. Background Art

[0002] Bridge jacking originated from the erection and displacement of railway bridges in the 1950s. In the 1990s, due to the rapid development of building object displacement technology, it began to be used for the overall synchronous jacking of bridges. With the development and popularization of computers, bridge jacking technology has also developed rapidly and is widely used, becoming an important technical means. The hydraulic jacks used for bridge jacking in the prior art usually do not have measures to deal with the failure of the hydraulic cylinder during the jacking process, which will cause uncontrollable displacement of the bridge and cause the bridge structure to slip. Therefore, the utility model provides a hydraulic jack for bridge jacking. Utility Model Content

[0003] The main purpose of the utility model is to provide a hydraulic jack for bridge jacking, so as to solve the problem proposed in the related art that during the jacking process, there is no measure to deal with the failure of the hydraulic cylinder, which will cause uncontrollable displacement of the bridge and cause the bridge structure to slip.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a hydraulic jack for bridge jacking is provided, including a jack cylinder sleeve, a piston rod is provided in the center of the top of the jack cylinder sleeve, a plurality of support columns are provided near the edge of the top of the jack cylinder sleeve, a plurality of latching teeth are provided on one side of the support column, a plurality of groups of rotating devices are provided on the outer wall of the jack cylinder sleeve, the rotating device includes a gear, a bevel gear is provided on one side of the gear, and a chain is provided on the bevel gear.

[0005] Furthermore, the piston rod is slidably mounted in the center of the top of the jack cylinder sleeve, and a support plate is fixedly mounted on the top of the piston rod.

[0006] Furthermore, the support column is slidably mounted on both sides of the top of the jack cylinder sleeve near the edge, and a plurality of the latch teeth are fixedly mounted on one side of the support column.

[0007] Furthermore, an annular groove is provided on the outer wall of the jack cylinder sleeve near the top, and the gear is rotatably mounted on both sides of the two ends of the annular groove, and the gear is meshed with the latch teeth.

[0008] Furthermore, a rotating shaft is fixedly installed at the center of the gear, and a bevel gear is fixedly installed at one end of the rotating shaft.

[0009] Furthermore, a motor is fixedly mounted on one end of the jack cylinder sleeve near the top.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] By arranging latches on the support columns and gears, bevel gears and chains on the jack cylinder sleeve, and connecting multiple second bevel gears through chains, synchronous rotation of all gears is achieved, thereby ensuring that the support columns can be raised and lowered synchronously, the support columns can firmly support the bridge structure, and the jack has higher stability during the jacking process, effectively preventing bridge displacement caused by failure of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a structural schematic diagram of a partial cutaway of a jack cylinder sleeve of the utility model;

[0014] Illustration Description:

[0015] 1. Jack cylinder sleeve; 11. Mounting plate; 12. Annular groove; 13. Slide groove; 14. Slot body; 15. Guide rod;

[0016] 2. Piston rod; 3. Support plate; 4. Support column; 41. Clamping tooth; 42. Gear; 43. First bevel gear; 44. Second bevel gear; 45. Motor; 46. Rotating shaft; 47. Chain. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0018] See also Figure 1 to Figure 2 The present embodiment provides a hydraulic jack for bridge lifting, including a jack cylinder sleeve 1, a piston rod 2 is provided in the center of the top of the jack cylinder sleeve 1, a plurality of support columns 4 are provided near the edge of the top of the jack cylinder sleeve 1, a plurality of latch teeth 41 are provided on one side of the support columns 4, a plurality of rotating devices are provided on the outer wall of the jack cylinder sleeve 1, the rotating devices include a gear 42, a bevel gear is provided on one side of the gear 42, and a chain 47 is provided on the bevel gear.

[0019] The piston rod 2 is slidably mounted in the center of the top of the jack cylinder sleeve 1, and a support plate 3 is fixedly mounted on the top of the piston rod 2. It should be supplemented that the top of the piston rod 2 is fixedly mounted on the center of the bottom of the support plate 3.

[0020] The support column 4 is slidably mounted on both sides of the top of the jack cylinder 1 near the edge, and a plurality of latch teeth 41 are fixedly mounted on one side of the support column 4. It should be added that a slide groove 13 is provided on both sides of the top of the jack cylinder 1 near the edge, and the support column 4 is slidably mounted in the slide groove 13. The size of the slide groove 13 is slightly larger than the size of the support column 4, so that the support column 4 can slide up and down without being blocked.

[0021] It is worth noting that a guide rod 15 is fixedly installed inside the slide groove 13, and a guide groove facing the guide rod 15 is provided inside the support column 4. The guide rod 15 extends into the guide groove, and the cross-sections of the guide groove and the guide rod 15 are both square, and the two are matched with each other.

[0022] An annular groove 12 is provided near the top of the outer wall of the jack cylinder sleeve 1, and the gear 42 is meshed with the latching teeth 41. It should be supplemented that: a groove body 14 communicating with the slide groove 13 is respectively penetrated on both sides of the two ends of the bottom of the annular groove 12, and the gear 42 is rotatably installed in the groove body 14. The groove body 14 at the bottom of the annular groove 12 is fixedly installed with mounting plates 11 on both sides, and the gear 42 is rotatably installed between the mounting plates 11.

[0023] The annular slot 12 communicates with the slide slot 13 so that the gear 42 is not blocked when meshing and rotating with the latch teeth 41. The latch teeth 41 are arranged on the support column 4 so that the gear 42 drives the support column 4 to slide upward and downward when meshing and rotating with the latch teeth 41.

[0024] A rotating shaft 46 is fixedly mounted at the center of the gear 42, and a bevel gear is fixedly mounted at one end of the rotating shaft 46. It should be supplemented that one end of the rotating shaft 46 is rotatably mounted at the center of one side of one of the mounting plates 11, and the other end of the rotating shaft 46 passes through the center of the other side of the other mounting plate 11. The bevel gears include a first bevel gear 43 and a second bevel gear 44. The first bevel gear 43 is fixedly mounted on the other end of the rotating shaft 46, and the second bevel gear 44 is vertically meshed with the first bevel gear 43. A chain 47 is provided on one side of a plurality of second bevel gears 44.

[0025] It is worth noting that a sprocket is coaxially fixed on the second bevel gear 44 , and the sprocket and the chain 47 are meshed with each other.

[0026] A motor 45 is fixedly mounted near the top of one end of the jack cylinder sleeve 1. It should be supplemented that the output shaft of the motor 45 is fixedly mounted at the center of the second bevel gear 44 at one end of the jack cylinder sleeve 1.

[0027] It should be noted that the support column 4 and the gear 42, the first bevel gear 43, and the second bevel gear 44 are each provided with at least three groups, and only one motor 45 is required, and its output shaft is fixedly connected to one of the second bevel gears 44, and the chain 47 is simultaneously engaged with the sprocket on each second bevel gear 44. Through this arrangement, it is possible to use one motor 45 to simultaneously drive multiple support columns 4 to move synchronously.

[0028] When the utility model is used in practice, first, the motor 45 installed at one end of the jack cylinder sleeve 1 is started. After the motor 45 starts working, its output shaft drives the second bevel gear 44 connected thereto to rotate. As the second bevel gear 44 rotates, the first bevel gear 43 vertically meshed with it also starts to rotate. The first bevel gear 43 is connected to the gear 42 through the rotating shaft 46, so the gear 42 also starts to rotate. Since the gear 42 meshes with the latch teeth 41 on the support column 4, the rotation of the gear 42 will drive the support column 4 to slide up and down in the slide groove 13. At the same time, the other second bevel gears 44 are connected to each other through the chain 47, so all the gears 42 rotate synchronously, so that the support column 4 rises and falls synchronously. As the gear 42 rotates, the support column 4 slides upward in the slide groove 13, presses against the support plate 3 to contact and firmly support the bridge structure. Through this arrangement, it can be ensured that when the jack fails, the support plate 3 on the jack is supported, so that it can continue to be used and avoid uncontrollable displacement.

[0029] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hydraulic jack for bridge lifting, comprising a jack cylinder (1), It is characterized in that A piston rod (2) is arranged in the center of the top of the jack cylinder sleeve (1), a plurality of support columns (4) are arranged near the edge of the top of the jack cylinder sleeve (1), a plurality of latching teeth (41) are arranged on one side of the support columns (4), and a plurality of rotating devices are arranged on the outer wall of the jack cylinder sleeve (1), the rotating devices comprising a gear (42), a bevel gear is arranged on one side of the gear (42), and a chain (47) is arranged on the bevel gear.

2. The hydraulic jack for bridge lifting according to claim 1, It is characterized in that The piston rod (2) is slidably mounted in the center of the top of the jack cylinder sleeve (1), and a support plate (3) is fixedly mounted on the top of the piston rod (2).

3. The hydraulic jack for bridge lifting according to claim 2, It is characterized in that The support column (4) is slidably mounted on both sides of the top of the jack cylinder sleeve (1) near the edge, and a plurality of the latch teeth (41) are fixedly mounted on one side of the support column (4).

4. The hydraulic jack for bridge lifting according to claim 3, It is characterized in that An annular groove (12) is provided on the outer wall of the jack cylinder sleeve (1) near the top, and the gear (42) is rotatably mounted on both sides of the two ends of the annular groove (12), and the gear (42) is meshed with the latching teeth (41).

5. The hydraulic jack for bridge lifting according to claim 4, It is characterized in that A rotating shaft (46) is fixedly mounted at the center of the gear (42), and a bevel gear is fixedly mounted at one end of the rotating shaft (46).

6. The hydraulic jack for bridge lifting according to claim 5, It is characterized in that A motor (45) is fixedly mounted on one end of the jack cylinder sleeve (1) near the top.

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