Hydraulic jack with mechanical self-locking protection device

Abstract

The utility model discloses a hydraulic jack with a mechanical self-locking protection device, which relates to the technical field of hydraulic jacks, and comprises a bottom plate, an adjusting and positioning component is arranged at the right end of the top of the bottom plate, the pressure in a cylinder barrel is detected through an arranged pressure measuring joint, and an arranged anti-explosion valve can play a self-locking role. The two output shafts drive the two telescopic shafts to stretch out and draw back front and back through the double-shaft driving motor, the use positions of the two trapezoidal guide plates are conveniently adjusted, the two positioning rods are conveniently connected and used, and the positioning rods and the trapezoidal guide plates are conveniently connected and positioned through the locking seats and the locking plates. The two guide positioning plates can be conveniently installed on the inner side faces of the two trapezoidal guide plates through the arranged locking screws, the front face and the rear face of the hydraulic protection mechanism are limited and reinforced through the arranged locking screws, the use stability of a piston in the hydraulic protection mechanism can be improved, and the fixed strip rods are reinforced and installed through the arranged two fixing bases; and a reinforcing plate is arranged to improve the use stability of the two guide positioning plates.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic jacks, and particularly relates to a hydraulic jack with a mechanical self-locking protection device. Background Technique

[0002] Hydraulic jacks are widely used in the lifting and supporting of large equipment, which is of great significance for ensuring the safety of the lifting construction of large equipment. Since the traditional hydraulic jack needs to support heavy objects by oil pressure for a long time during the lifting construction, there is a safety risk that the jack suddenly fails and causes the load to become unstable. Moreover, a mechanical screw jack is usually selected during the lifting process, thus consuming a large amount of human and equipment resources.

[0003] In the patent with the publication number of CN208150914U, a hydraulic jack with a mechanical self-locking protection device is proposed. In this patent, it includes a pressure head, a piston rod, a toothed nut, a lifting lug, a cylinder barrel, a limit buckle, a small gear, a fixed bracket, a reducer, a valve block, an electromagnetic cut-off valve, an explosion-proof valve, a pressure measuring joint, and a mechanical self-locking protection device. During the ascending and descending processes of the piston rod 2 of the jack 19, the servo motor 13 drives the small gear 10 to rotate through the reducer 12. The small gear 10 meshes with the toothed nut 3, driving the toothed nut 3 sleeved on the trapezoidal thread of the piston rod 2 of the jack 19 to make a rotational movement, and keeping the gap between the lower plane of the toothed nut 3 and the upper plane of the upper end cover 4 of the jack 19 unchanged. The set gap is about 0.4 mm. When the gap increases and decreases by 0.2 mm during the operation process, the rigid limit buckles 9 symmetrically arranged on the outer wall of the cylinder barrel 7 and the toothed nut 3 start to work, slowing down and preventing the toothed nut 3 from rotating. When the gap meets the requirements, the toothed nut 3 continues to rotate normally. During the ascending and descending processes, by controlling the servo motor 13, the mechanical self-locking protection device 18 is automatically matched to follow the speed, realizing synchronous following of mechanical protection. When the lifting is in place, the hydraulic and mechanical self-locking protection devices 18 are locked successively; the explosion-proof valve 16 is a pressure protection device for the hydraulic jack 19, which opens when the oil pressure in the jack exceeds the designed maximum limit to prevent the cylinder barrel 7 from bursting. The electromagnetic cut-off valve 15 realizes the jack 19 to stop at any displacement and self-hold the pressure through controlling the electrical signal. However, there are still the following problems in this patent:

[0004] When the existing jack is in use, it will apply a downward gravity, and its use stability is not good, resulting in the jack being prone to shaking during use and not easy to position and guide.

[0005] In view of the above problems, it is necessary to design a hydraulic jack with a mechanical self-locking protection device to overcome the above problems. Content of the Utility Model

[0006] The main purpose of the utility model is to provide a hydraulic jack with a mechanical self-locking protection device, which can effectively solve the problems in the background technique.

[0007] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0008] A hydraulic jack with a mechanical self-locking protection device, including a bottom plate, and an adjustment and positioning assembly is arranged at the right end of the top of the bottom plate;

[0009] The adjustment and positioning assembly includes a double-shaft drive motor arranged in the middle of the right end of the top of the bottom plate. Output shafts are arranged on both the front and back sides of the double-shaft drive motor. Telescopic shafts are arranged on both the front and back sides of the two output shafts. Connecting rods are installed on both the front and back sides of the two telescopic shafts. Positioning rods are installed on the left sides of the two connecting rods. Locking seats are installed on the left sides of the two positioning rods. Locking plates are installed on the left sides of the two locking seats. Trapezoidal guide plates are installed on the left sides of the two locking plates. Locking screws are installed at the lower ends of the inner sides of the two trapezoidal guide plates. Guide and positioning plates are installed on the inner sides of the four locking screws. Fixed seats are installed at the upper ends of the right sides of the two trapezoidal guide plates. Fixed strip rods are installed on the right sides of the two fixed seats. Reinforcing plates are installed on the inner sides of the two fixed strip rods;

[0010] Moving wheels are installed at the four corners of the bottom of the bottom plate. Fixed columns are installed at one end of the bottom of the bottom plate close to the moving wheels. A hydraulic protection mechanism is arranged in the middle of the top of the bottom plate. A hydraulic pump is arranged at the top of the hydraulic protection mechanism. A pressure rod is installed at one end of the hydraulic pump. A cylinder barrel is installed at the left end of the top of the bottom plate. A pressure measurement joint is arranged at the upper end of the left side of the cylinder barrel. An explosion-proof valve is arranged at the top of the pressure measurement joint. A mechanical self-locking protection device is arranged at the left end of the top of the hydraulic protection mechanism.

[0011] As a preferred solution of the present utility model, the double-shaft drive motor is in transmission connection with the telescopic shaft through the output shaft, and the two telescopic shafts are in threaded connection with the connecting rod.

[0012] As a preferred solution of the present utility model, the two connecting rods are in threaded connection with the positioning rod, the two positioning rods are in threaded connection with the locking seat, and the two locking seats are fixedly connected with the locking plate.

[0013] As a preferred solution of the present utility model, the two locking plates are in threaded connection with the two trapezoidal guide plates, the two trapezoidal guide plates are in threaded connection with the four locking screws, and the four locking screws are in threaded connection with the two guide and positioning plates.

[0014] As a preferred solution of the present utility model, the two trapezoidal guide plates are fixedly connected with the two fixed seats, the two fixed seats are in threaded connection with the two fixed strip rods, and the two fixed strip rods are fixedly connected with the two reinforcing plates.

[0015] As a preferred solution of the present utility model, the bottom plate is threadedly connected to the four moving wheels and the fixed columns respectively. The hydraulic protection mechanism is movably and detachably connected to the hydraulic pump, and the hydraulic pump is movably connected to the pressure rod.

[0016] Advantages and effects

[0017] Compared with the prior art, the present utility model has the following advantages and effects:

[0018] 1. For the hydraulic jack with a mechanical self-locking protection device, the pressure in the cylinder is detected through the pressure measuring joint provided. In case of abnormal detection, the explosion-proof valve provided can perform the self-locking function. The two output shafts drive the two telescopic shafts to stretch back and forth through the double-shaft drive motor, which is convenient for adjusting the use positions of the two trapezoidal guide plates. The two positioning rods provided are convenient for connection and use. The locking seat and the locking plate are convenient for connecting and positioning the positioning rod and the trapezoidal guide plate. The locking screw is convenient for installing the two guide positioning plates on the inner sides of the two trapezoidal guide plates. The locking screw limits and strengthens the front and back sides of the hydraulic protection mechanism, which can improve the use stability of the piston in the hydraulic protection mechanism. The two fixed seats reinforce and install the fixed strip rod, and the reinforcing plate improves the use stability of the two guide positioning plates. Description of the drawings

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 is the structural schematic diagram of the explosion-proof valve of the present utility model;

[0021] Figure 3 is the structural schematic diagram of the adjustment and positioning assembly of the present utility model.

[0022] In the figure: 1. Bottom plate; 2. Moving wheel; 3. Fixed column; 4. Adjustment and positioning assembly; 5. Hydraulic protection mechanism; 6. Hydraulic pump; 7. Pressure rod; 8. Cylinder; 9. Pressure measuring joint; 10. Explosion-proof valve; 11. Mechanical self-locking protection device; 401. Double-shaft drive motor; 402. Output shaft; 403. Telescopic shaft; 404 Connecting rod; 405. Positioning rod; 406. Locking seat; 407. Locking plate; 408. Trapezoidal guide plate; 409 Locking screw; 410. Guide positioning plate; 411. Fixed seat; 412. Fixed strip rod; 413. Reinforcing plate. Specific implementation manners

[0023] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0024] Such as Figures 1 - 3As shown in the figure, a hydraulic jack with a mechanical self-locking protection device includes a bottom plate 1, and an adjustment and positioning assembly 4 is arranged at the right end of the top of the bottom plate 1;

[0025] The adjustment and positioning assembly 4 includes a double-shaft drive motor 401 arranged in the middle of the right end of the top of the bottom plate 1. Output shafts 402 are arranged on the front and back sides of the double-shaft drive motor 401. Telescopic shafts 403 are arranged on the front and back sides of the two output shafts 402. Connecting rods 404 are installed on the front and back sides of the two telescopic shafts 403. Positioning rods 405 are installed on the left sides of the two connecting rods 404. Locking seats 406 are installed on the left sides of the two positioning rods 405. Locking plates 407 are installed on the left sides of the two locking seats 406. Trapezoidal guide plates 408 are installed on the left sides of the two locking plates 407. Locking screws 409 are installed at the lower ends of the inner sides of the two trapezoidal guide plates 408. A guide and positioning plate 410 is installed on the inner sides of the four locking screws 409. Fixed seats 411 are installed at the upper ends of the right sides of the two trapezoidal guide plates 408. Fixed strip rods 412 are installed on the right sides of the two fixed seats 411. Reinforcing plates 413 are installed on the inner sides of the two fixed strip rods 412;

[0026] Moving wheels 2 are installed at the four corners of the bottom of the bottom plate 1. Fixed columns 3 are installed at one end of the bottom of the bottom plate 1 close to the moving wheels 2. A hydraulic protection mechanism 5 is arranged in the middle of the top of the bottom plate 1. A hydraulic pump 6 is arranged at the top of the hydraulic protection mechanism 5. A pressure rod 7 is installed at one end of the hydraulic pump 6. A cylinder barrel 8 is installed at the left end of the top of the bottom plate 1. A pressure measuring joint 9 is arranged at the upper end of the left side of the cylinder barrel 8. An explosion-proof valve 10 is arranged at the top of the pressure measuring joint 9. A mechanical self-locking protection device 11 is arranged at the left end of the top of the hydraulic protection mechanism 5;

[0027] The double-shaft drive motor 401 is in transmission connection with the telescopic shaft 403 through the output shaft 402. The two telescopic shafts 403 are in threaded connection with the connecting rod 404; the two connecting rods 404 are in threaded connection with the positioning rod 405, the two positioning rods 405 are in threaded connection with the locking seat 406, and the two locking seats 406 are fixedly connected with the locking plate 407; the two locking plates 407 are in threaded connection with the two trapezoidal guide plates 408, the two trapezoidal guide plates 408 are in threaded connection with the four locking screws 409, and the four locking screws 409 are in threaded connection with the two guide and positioning plates 410; the two trapezoidal guide plates 408 are fixedly connected with the two fixed seats 411, the two fixed seats 411 are in threaded connection with the two fixed strip rods 412, and the two fixed strip rods 412 are fixedly connected with the two reinforcing plates 413;

[0028] The bottom plate 1 is in threaded connection with the four moving wheels 2 and the fixed columns 3. The hydraulic protection mechanism 5 is movably connected with the hydraulic pump 6 and is detachable. The hydraulic pump 6 is movably connected with the pressure rod 7;

[0029] Among them, the pressure in the cylinder barrel 8 is detected through the pressure measuring joint 9 provided. In case of abnormal detection, the explosion-proof valve 10 provided can perform a self-locking function. The two output shafts 402 provided are driven by the double-shaft drive motor 401 to drive the two telescopic shafts 403 to stretch back and forth, facilitating the adjustment of the use positions of the two trapezoidal guide plates 408. The two positioning rods 405 provided are convenient for connection. The locking seat 406 and the locking plate 407 are convenient for connecting and positioning the positioning rod 405 with the trapezoidal guide plate 408. The locking screw 409 is convenient for installing the two guiding and positioning plates 410 on the inner sides of the two trapezoidal guide plates 408. The locking screw 409 limits and strengthens the front and back sides of the hydraulic protection mechanism 5, which can improve the use stability of the piston in the hydraulic protection mechanism 5. The two fixed seats 411 reinforce and install the fixed strip bars 412, and the reinforcing plate 413 improves the use stability of the two guiding and positioning plates 410.

[0030] It should be noted that the present utility model is a hydraulic jack with a mechanical self-locking protection device. When in use, manually press the lever 7 to lift and lower the piston rod in the hydraulic protection mechanism 5 to use the jack. The pressure measuring joint 9 detects the pressure in the cylinder barrel 8, and the explosion-proof valve 10 can perform an explosion-proof function. The mechanical self-locking protection device 11 provided can, together with the explosion-proof valve 10, perform a protection function when the jack is used abnormally. The double-shaft drive motor 401 drives the two output shafts 402 to drive the telescopic shafts 403 to stretch back and forth, so as to adjust the use angles of the two trapezoidal guide plates 408, and the two guiding and positioning plates 410 position and strengthen the front and back sides of the hydraulic protection mechanism 5, improving the use stability of the hydraulic protection mechanism 5. The two trapezoidal guide plates 408 install and position the positioning rod 405 by using the locking seat 406 and the locking plate 407, and the two locking screws 409 are locked and installed by using the locking screw 409. When the two guiding and positioning plates 410 are in use, the two fixed seats 411 can improve the use stability of the two guiding and positioning plates 410 by using the fixed strip bars 412 and the reinforcing plate 413 and reinforce their use. The moving wheels 2 are convenient for moving, and the fixed columns 3 support and reinforce the bottom plate 1.

[0031] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic jack with a mechanical self-locking protection device, comprising a bottom plate (1), characterized in that: At the right end of the top of the bottom plate (1), an adjusting and positioning assembly (4) is provided; The adjusting and positioning assembly (4) includes a double-shaft driving motor (401) arranged in the middle of the right end of the top of the bottom plate (1). Output shafts (402) are arranged on both the front and back sides of the double-shaft driving motor (401). Telescopic shafts (403) are arranged on both the front and back sides of the two output shafts (402). Connecting rods (404) are installed on both the front and back sides of the two telescopic shafts (403). Positioning rods (405) are installed on the left side surfaces of the two connecting rods (404). Locking seats (406) are installed on the left side surfaces of the two positioning rods (405). Locking plates (407) are installed on the left side surfaces of the two locking seats (406). Trapezoidal guiding plates (408) are installed on the left side surfaces of the two locking plates (407). Locking screws (409) are installed at the lower ends of the inner side surfaces of the two trapezoidal guiding plates (408). A guiding and positioning plate (410) is installed on the inner side surfaces of the four locking screws (409). Fixed seats (411) are installed at the upper ends of the right side surfaces of the two trapezoidal guiding plates (408). Fixed bar rods (412) are installed on the right side surfaces of the two fixed seats (411). Reinforcing plates (413) are installed on the inner side surfaces of the two fixed bar rods (412); Moving wheels (2) are installed at the four corners of the bottom of the bottom plate (1). Fixed columns (3) are installed at one end of the bottom of the bottom plate (1) close to the moving wheels (2). A hydraulic protection mechanism (5) is arranged in the middle of the top of the bottom plate (1). A hydraulic pump (6) is arranged at the top of the hydraulic protection mechanism (5). A pressing rod (7) is installed at one end of the hydraulic pump (6). A cylinder barrel (8) is installed at the left end of the top of the bottom plate (1). A pressure measuring joint (9) is arranged at the upper end of the left side surface of the cylinder barrel (8). An explosion-proof valve (10) is arranged at the top of the pressure measuring joint (9). A mechanical self-locking protection device (11) is arranged at the left end of the top of the hydraulic protection mechanism (5).

2. The hydraulic jack with a mechanical self-locking protection device according to claim 1, wherein: The double-shaft driving motor (401) is in transmission connection with the telescopic shaft (403) through the output shaft (402). The two telescopic shafts (403) are in threaded connection with the connecting rod (404).

3. A hydraulic jack with a mechanical self-locking protection device according to claim 1, characterized in that: The two connecting rods (404) are in threaded connection with the positioning rod (405). The two positioning rods (405) are in threaded connection with the locking seat (406). The two locking seats (406) are fixedly connected with the locking plate (407).

4. A hydraulic jack with a mechanical self-locking protection device according to claim 1, characterized in that: The two locking plates (407) are in threaded connection with the two trapezoidal guiding plates (408). The two trapezoidal guiding plates (408) are in threaded connection with the four locking screws (409). The four locking screws (409) are in threaded connection with the two guiding and positioning plates (410).

5. A hydraulic jack with a mechanical self-locking protection device according to claim 1, characterized in that: The two trapezoidal guiding plates (408) are both fixedly connected with the two fixed seats (411). The two fixed seats (411) are in threaded connection with the two fixed bar rods (412). The two fixed bar rods (412) are both fixedly connected with the two reinforcing plates (413).

6. A hydraulic jack with a mechanical self-locking protection device according to claim 1, characterized in that: The bottom plate (1) is threadedly connected to the four moving wheels (2) and the fixed column (3). The hydraulic protection mechanism (5) is movably and detachably connected to the hydraulic pump (6). The hydraulic pump (6) is movably connected to the pressure rod (7).

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