A shielding hydraulic support

Abstract

The invention discloses a shielding hydraulic support, which belongs to the technical field of underground support safety; it comprises a base and a top beam; the bottom end of the top beam is rotatably connected to two support rods, and the tops of the two support rods are hinged; the bottom ends of the two support rods are rotatably connected to sliders, the sliders are slidably connected to the base, the sliders are connected to a limiting mechanism, and an unfolding mechanism is arranged inside the base; the clamping design of the clamping strips and the oblique racks arranged inside the sliders, as well as the removal and support of the frame, effectively expands the contact area of ​​the base and improves the stability of the support in mine operations; the parallelogram structure formed between the threaded sliders, the support rods and the telescopic blocks enables the threaded rods to push the telescopic blocks to move when rotating until they touch the ground and fill the height difference, thereby enhancing the adaptability of the support to different terrains and working environments.

Description

Technical Field

[0001] The invention belongs to the technical field of underground support safety, and relates to a hydraulic support, in particular to a shielding type hydraulic support. Background Art

[0002] In the mine operation environment, the shield hydraulic support, as an important supporting equipment, bears the important responsibility of ensuring the safety of workers and maintaining the stability of the mine. However, the existing shield hydraulic support often faces some challenges during use, especially after long-term use.

[0003] First, due to the complexity of the mine environment and the long-term heavy pressure, key components such as hydraulic cylinders may sink to a certain extent; this sinking will not only affect the support effect of the support, but also pose a potential threat to the overall stability of the mine; especially in some areas with complex geological conditions and deep mines, the sinking problem of hydraulic supports is particularly prominent;

[0004] Secondly, when a shield hydraulic support fails in a mine, maintenance becomes particularly difficult; due to the limited space in the mine and the possibility of various safety hazards, workers often face huge challenges when performing maintenance; what is more serious is that if the hydraulic cylinder suddenly releases pressure during maintenance, it will cause serious injuries to the workers and even endanger their lives.

[0005] Therefore, it is necessary to provide a new shielding hydraulic support to solve the above technical problems. Summary of the invention

[0006] The present invention overcomes the shortcomings of the prior art and proposes a shielding type hydraulic support; the present invention is achieved through the following technical solutions:

[0007] A shielding hydraulic support comprises a base, a shielding beam is hingedly connected to the top of the base, a top beam is installed at one end of the shielding beam, and a column is installed between the base and the top beam; the bottom end of the top beam is rotatably connected to two support rods, and the tops of the two support rods are hinged; the bottom ends of the two support rods are rotatably connected to sliders, the sliders are slidably connected to the base, the sliders are connected to a limited position mechanism, and an expansion mechanism is provided inside the base;

[0008] The limiting mechanism includes a limiting slide, a clamping strip, a limiting spring, an oblique rack and an avoidance groove. The inner wall of the slider is rotationally symmetrically provided with a limiting slide, one end of the limiting slide is inside the slider, and the other end of the limiting slide passes through the side wall of the slider; two clamping strips arranged side by side are slidably connected inside the limiting slide, one end of the clamping strip is provided with a connecting block, one side of the connecting block is fixedly connected to the inner wall of the limiting slide, and the other end of the clamping strip extends to the outside of the slider; oblique racks are symmetrically fixedly connected inside the base, and the two clamping strips in the limiting slide are intermittently clamped with the oblique rack on the same side; the oblique teeth of the same oblique rack are arranged opposite to each other on the left and right sides, and are oriented in an eight-shaped direction; an avoidance groove is provided at the bottom of the slider, and the avoidance groove and the limiting slide are connected.

[0009] The unfolding mechanism includes a dual-axis motor, a square rod, a frame, a pull rod, a threaded slider, a strut and a telescopic block; a dual-axis motor is fixedly connected inside the base, and the two output ends of the dual-axis motor are fixedly connected to the square rod, the frame is symmetrically slidably connected inside the base, both sides of the two sliders are rotatably connected to the pull rods, the frame is rotatably connected to the two pull rods on the same side, the frame is rotatably connected to the threaded rod, a square hole corresponding to the square rod is opened at the axis of the threaded rod, the square rod is slidably connected to the threaded rod through the square hole, a threaded slider is slidably connected to the top of the frame, and the threaded rod is connected to the threaded slider; two sets of struts are symmetrically rotatably connected at both ends of the threaded slider, and the bottom ends of the two sets of struts are rotatably connected to the telescopic block; a through groove is opened at the bottom of the frame, the telescopic block is slidably connected to the inner wall of the through groove of the frame, and a parallelogram structure is formed between the threaded slider, the two sets of struts and the telescopic block.

[0010] Furthermore, a slide groove is provided in the middle of the base, and the two sliding blocks are slidably connected to the slide groove; and the two side walls of the slide groove are symmetrically fixedly connected with bevel racks.

[0011] Furthermore, an unlocking mechanism is installed on the inner wall of the base, and the unlocking mechanism is installed in coordination with the unfolding mechanism.

[0012] Furthermore, the unlocking mechanism includes a trapezoidal unlocking strip, a trapezoidal top rod, a return spring, a one-way gear, a T-shaped rack, meshing teeth and a meshing spring. A trapezoidal unlocking strip is slidably connected inside the base, and the trapezoidal inclined surface at the top of the trapezoidal unlocking strip is located below the connecting block; a trapezoidal top rod is provided inside the base, one end of the trapezoidal top rod is fixedly connected to the inside of the base with a return spring, the upper surface of the trapezoidal top rod is in contact with the trapezoidal unlocking strip, a one-way gear is fixedly connected to the square rod, a T-shaped rack is slidably connected to the inner wall of the base, the T-shaped rack is meshed with the one-way gear, the top end of the T-shaped rack is in contact with one end of the trapezoidal top rod away from the return spring, the bottom end of the T-shaped rack is slidably connected with a movable meshing tooth, a meshing spring is installed at the sliding position between the meshing tooth and the T-shaped rack, and the meshing tooth and the teeth of the T-shaped rack are parallel.

[0013] Furthermore, the contact positions of the T-shaped rack and the trapezoidal push rod are both provided with inclined surfaces for mutual friction.

[0014] The beneficial effects of the present invention compared with the prior art are as follows:

[0015] 1. Improve stability and security:

[0016] The top beam is driven to rise by a hydraulic cylinder or other power device, and the coordinated action of the support rod, slider and other components is driven to achieve stable rise and support of the bracket;

[0017] The design of the connection between the clip bar and the bevel rack inside the slider, as well as the removal and support of the frame, effectively expands the contact area of ​​the base and improves the stability of the bracket in mine operations;

[0018] The design of the unlocking mechanism ensures that the slider can be quickly and safely released from the restriction when needed, avoiding safety hazards caused by bracket failure.

[0019] 2. Enhance adaptability and flexibility:

[0020] The parallelogram structure formed between the threaded slider, the support rod and the telescopic block enables the threaded rod to push the telescopic block to move when rotating until it touches the ground and fills the height difference; this design enhances the adaptability of the bracket to different terrains and working environments;

[0021] The meshing teeth and meshing spring design in the unlocking mechanism enable the one-way gear to briefly contact and push the meshing teeth to move when rotating, and then quickly reset and disengage from the one-way gear, thereby avoiding continuous obstruction; this design improves the flexibility and ease of operation of the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the shielding hydraulic support provided by the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the frame shown;

[0024] Figure 3 for Figure 2 The schematic diagram of the structure of the helical rack as shown in the figure from an upward angle;

[0025] Figure 4 for Figure 3 An enlarged view of point A is shown;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the unfolding mechanism shown;

[0027] Figure 6 is a structural schematic diagram of the unlocking mechanism;

[0028] Figure 7 for Figure 6Schematic diagram of the structure of the bottom of the T-shaped rack shown.

[0029] Numbers in the figure:

[0030] 1. Base; 2. Cover beam; 3. Top beam; 4. Post; 5. Support rod; 6. Slider; 7. Slide; 8. Limit mechanism; 9. Expanding mechanism; 81. Limit slide; 82. Card bar; 83. Limit spring; 84. Bevel rack; 85. Avoidance groove; 91. Dual-axis motor; 92. Square rod; 93. Frame; 94. Pull rod; 95. Threaded slider; 96. Support rod; 97. Telescopic block; 98. Threaded rod; 101. Trapezoidal unlocking strip; 102. Trapezoidal top rod; 103. Reset spring; 104. One-way gear; 105. T-type rack; 106. Meshing teeth; 107. Meshing spring. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0032] See also Figures 1 to 7 The present embodiment proposes a shielding hydraulic support, which includes: a base 1, a support rod 5, a limiting mechanism 8, an unfolding mechanism 9 and an unlocking mechanism. The top of the base 1 is rotatably connected to a shielding beam 2 through a push rod, and a top beam 3 is installed at one end of the shielding beam 2. Two columns 4 are installed between the base 1 and the top beam 3. The bottom end of the top beam 3 is rotatably connected to the two support rods 5, and the tops of the two support rods 5 are hinged; the bottom ends of the two support rods 5 are rotatably connected to sliders 6, a slide groove 7 is provided in the middle of the base 1, and the two sliders 6 are slidably connected to the slide groove 7, and a limiting mechanism 8 is installed between the slider 6 and the slide groove 7, and an unfolding mechanism 9 is installed inside the base 1, and the unfolding mechanism 9 is slidably connected to the two sliders 6, and an unlocking mechanism is installed on the inner wall of the base 1, and the unlocking mechanism is installed in coordination with the unfolding mechanism 9.

[0033] See also Figure 3 and Figure 4The limiting mechanism 8 includes: a limiting slide 81, a clamping strip 82, a limiting spring 83, an oblique rack 84 and an avoidance groove 85. Two limiting slides 81 are rotationally symmetrically provided on the inner wall of the slider 6. One end of the limiting slide 81 is inside the slider 6, and the other end of the limiting slide 81 passes through the side wall of the slider 6. Two clamping strips 82 arranged side by side are slidably connected inside each limiting slide 81. A connecting block is provided at one end of the clamping strip 82. A limiting spring 83 is fixedly connected between one side of the connecting block and the inner wall of the limiting slide 81. The other end of the clamping strip 82 extends to the outside of the slider 6. Oblique racks 84 are symmetrically fixedly connected to the two side walls of the slide 7. The two clamping strips 82 in a limiting slide 81 are intermittently clamped with the oblique rack 84 on the same side. The oblique teeth of the same oblique rack 84 are arranged opposite to each other on the left and right sides, and are oriented in an eight-shaped manner. An avoidance groove 85 is provided in the middle of the bottom end of the slider 6, and the avoidance groove 85 is connected to the limiting slide 81.

[0034] See also Figure 3 and Figure 5 The unfolding mechanism 9 includes: a double-axis motor 91, a square rod 92, a frame 93, a pull rod 94, a threaded slider 95, a support rod 96 and a telescopic block 97. The double-axis motor 91 is fixedly connected inside the base 1. The two output ends of the double-axis motor 91 are fixedly connected to the square rod 92. The frame 93 is symmetrically slidably connected inside the base 1. The two sides of the two sliders 6 are rotatably connected to the pull rods 94. The frame 93 is rotatably connected to the two pull rods 94 on the same side. The middle part of the frame 93 is rotatably connected to the threaded rod 98. The axis of the threaded rod 98 is provided with a square hole corresponding to the square rod 92. The square rod 92 is slidably connected to the threaded rod 98 through a square hole, and a threaded slider 95 is slidably connected to the top of the frame 93, and the threaded rod 98 is connected to the threaded slider 95; two ends of the threaded slider 95 are symmetrically rotatably connected to two groups of support rods 96, and the bottom ends of the two groups of support rods 96 are rotatably connected to telescopic blocks 97; a through groove is provided at the bottom of the frame 93, and the telescopic block 97 is slidably connected to the inner wall of the through groove of the frame 93, and a parallelogram structure is formed between the threaded slider 95, the two groups of support rods 96 and the telescopic block 97, and corresponding inclined surfaces are provided at the bottom edge of the telescopic block 97 and the edge of the through groove.

[0035] See also Figure 6 and Figure 7The unlocking mechanism includes: a trapezoidal unlocking strip 101, a trapezoidal top rod 102, a return spring 103, a one-way gear 104, a T-shaped rack 105, meshing teeth 106 and a meshing spring 107. The base 1 is slidably connected to the trapezoidal unlocking strip 101, the base 1 is slidably connected to the trapezoidal top rod 102, one end of the trapezoidal top rod 102 is fixedly connected to the inner wall of the base 1 with a return spring 103, the upper surface of the trapezoidal top rod 102 is in contact with the trapezoidal unlocking strip 101, and the middle part of the square rod 92 is fixedly connected with The one-way gear 104 and the inner wall of the base 1 are slidably connected with a T-shaped rack 105, the T-shaped rack 105 is meshed with the one-way gear 104, the top of the T-shaped rack 105 is in contact with the end of the trapezoidal top rod 102 away from the reset spring 103, and both are provided with inclined surfaces for mutual friction, the bottom end of the T-shaped rack 105 is slidably connected with a movable meshing tooth 106, and a meshing spring 107 is installed at the sliding position between the meshing tooth 106 and the T-shaped rack 105, and the teeth of the meshing tooth 106 and the T-shaped rack 105 are parallel.

[0036] The working principle of the shielding hydraulic support provided by the present invention is as follows:

[0037] Initial state and rising momentum:

[0038] In the initial state, the base 1, the shielding beam 2, the top beam 3 and the column 4 of the shielding hydraulic support are all in a stable connection state;

[0039] When the bracket needs to rise, the top beam 3 is driven to rise by a power device such as a hydraulic cylinder; this rising power simultaneously drives the top ends of the two support rods 5 rotatably connected to the bottom of the top beam 3 to rise, gradually becoming an upright state.

[0040] Interaction between the helical rack 84 and the card strip 82:

[0041] As the support rod 5 rises, the two sliders 6 at the bottom end thereof approach each other in the slide groove 7;

[0042] When the two sets of clamping strips 82 disposed inside the slider 6 contact the oblique racks 84 on the side wall of the slide slot 7, they will continuously compress the limit spring 83 along the slope of the oblique racks 84;

[0043] Since the two groups of clips 82 inside the same slider 6 are rotationally symmetrically arranged, and the bevel teeth of the two bevel racks 84 are symmetrically oriented in an eight-shaped shape, when the slider 6 moves, the two groups of clips 82 will be staggered, one of the clips 82 will be engaged with the bevel rack 84, while the other clip 82 will not be engaged, thereby ensuring the stable sliding of the slider 6 in the slide groove 7.

[0044] Removal and support of frame 93:

[0045] When the two sliders 6 approach each other, they push the frame 93 slidably connected to the inside of the base 1 out of the base 1 through two sets of pull rods 94;

[0046] The removal of the frame 93 not only expands the contact area of ​​the base 1, but also forms an additional supporting structure, thereby improving the stability of the bracket.

[0047] The synergy between the dual-axis motor 91 and the threaded rod 98:

[0048] After the frame 93 is moved out, the dual-axis motor 91 installed inside the base 1 is started;

[0049] The two output ends of the dual-axis motor 91 respectively drive the two square rods 92 to rotate;

[0050] The square rod 92 is slidably connected to the threaded rod 98 through the square groove, so the rotation of the square rod 92 will drive the threaded rod 98 to rotate;

[0051] Since a parallelogram structure is formed between the threaded slider 95, the two sets of support rods 96 and the telescopic block 97, when the threaded rod 98 rotates, the threaded slider 95 will slide inside the frame 93 and push the telescopic block 97 to move;

[0052] The telescopic block 97 moves obliquely downward and extends from the bottom of the frame 93 until it touches the ground, thereby filling the height difference between the frame 93 and the bottom end of the base 1, and further enhancing the supporting effect of the bracket.

[0053] How the unlocking mechanism works:

[0054] When it is necessary to unlock the limit of the slider 6, the dual-axis motor 91 is started in reverse;

[0055] At this time, the one-way gear 104 on the square rod 92 starts to rotate; due to the design of the one-way gear 104, it can only drive the T-shaped rack 105 to move in one direction;

[0056] The T-shaped rack 105 moves under the drive of the one-way gear 104 and pushes the trapezoidal push rod 102 to compress the limit spring 83; at the same time, the inclined surface of the trapezoidal push rod 102 squeezes the trapezoidal unlocking strip 101 to rise, so that it enters the avoidance groove 85;

[0057] After the trapezoidal unlocking strip 101 rises, the two small inclined surfaces of the trapezoidal unlocking strip 101 squeeze the connecting block on the clamping strip 82, so that the connecting block on the clamping strip 82 compresses the limit spring 83 and moves the end of the clamping strip 82 away from the connecting block out of the inclined rack 84, thereby releasing the restriction on the slider 6;

[0058] In this process, the meshing teeth 106 and the meshing spring 107 also play a key role; when the one-way gear 104 rotates, it will briefly contact the meshing teeth 106 and push it to move; however, due to the elastic force of the meshing spring 107, the meshing teeth 106 will quickly reset and always disengage from the one-way gear 104, thereby avoiding continuous obstruction to the one-way gear 104;

[0059] In this way, when the T-shaped rack 105 pushes the trapezoidal push rod 102 and the trapezoidal unlocking strip 101 to complete the unlocking action, the two sliders 6 can move away normally, thereby realizing the contraction and disassembly of the bracket.

[0060] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A shielding hydraulic support, comprising a base (1), a shielding beam (2) being hingedly connected to the top of the base (1), a top beam (3) being mounted on one end of the shielding beam (2), and a column (4) being mounted between the base (1) and the top beam (3); characterized in that: The bottom end of the top beam (3) is rotatably connected to two support rods (5), and the tops of the two support rods (5) are hinged; the bottom ends of the two support rods (5) are both rotatably connected to sliders (6), the sliders (6) are slidably connected to the base (1), the sliders (6) are connected to a limiting mechanism (8), and an expansion mechanism (9) is provided inside the base (1); The limiting mechanism (8) comprises a limiting slide groove (81), a clamping strip (82), a limiting spring (83), an oblique rack (84) and an avoidance groove (85); the inner wall of the slider (6) is provided with a limiting slide groove (81) in a rotationally symmetrical manner; one end of the limiting slide groove (81) is inside the slider (6), and the other end of the limiting slide groove (81) penetrates the side wall of the slider (6); two clamping strips (82) arranged side by side are slidably connected inside the limiting slide groove (81); one end of the clamping strip (82) is provided with a connecting block, and one side of the connecting block is connected to the limiting slide A limit spring (83) is fixedly connected between the inner walls of the groove (81), and the other end of the clamping strip (82) extends to the outside of the slider (6); a beveled rack (84) is symmetrically fixedly connected inside the base (1), and the two clamping strips (82) in the limit sliding groove (81) are intermittently clamped with the beveled rack (84) on the same side; the beveled teeth of the same beveled rack (84) are arranged on the left and right sides opposite to each other and face each other in an eight-shaped pattern; an avoidance groove (85) is provided at the bottom of the slider (6), and the avoidance groove (85) is connected to the limit sliding groove (81); The unfolding mechanism (9) comprises a dual-axis motor (91), a square rod (92), a frame (93), a pull rod (94), a threaded slider (95), a support rod (96) and a telescopic block (97); the dual-axis motor (91) is fixedly connected inside the base (1); both output ends of the dual-axis motor (91) are fixedly connected to the square rod (92); the frame (93) is symmetrically slidably connected inside the base (1); both sides of the two sliders (6) are rotatably connected to the pull rods (94); the frame (93) is rotatably connected to the two pull rods (94) on the same side; the frame (93) is rotatably connected to the threaded rod (98); a square hole corresponding to the square rod (92) is opened at the axis of the threaded rod (98); The square rod (92) is slidably connected to the threaded rod (98) through the square hole; a threaded slider (95) is slidably connected to the top of the frame (93); the threaded rod (98) is connected to the threaded slider (95); when the threaded rod (98) rotates, the threaded slider (95) slides inside the frame (93); two groups of support rods (96) are symmetrically rotatably connected at both ends of the threaded slider (95); the bottom ends of the two groups of support rods (96) are rotatably connected to a telescopic block (97); a through groove is provided at the bottom of the frame (93); the telescopic block (97) is slidably connected to the inner wall of the through groove of the frame (93); a parallelogram structure is formed between the threaded slider (95), the two groups of support rods (96) and the telescopic block (97).

2. A shielding hydraulic support according to claim 1, characterized in that: A slide groove (7) is provided in the middle of the base (1), and the two sliding blocks (6) are slidably connected to the slide groove (7); and the two side walls of the slide groove (7) are symmetrically fixedly connected with oblique racks (84).

3. The shielding hydraulic support according to claim 1, characterized in that: An unlocking mechanism is installed on the inner wall of the base (1), and the unlocking mechanism is installed in coordination with the unfolding mechanism (9).

4. A shielding hydraulic support according to claim 3, characterized in that: The unlocking mechanism comprises a trapezoidal unlocking strip (101), a trapezoidal push rod (102), a return spring (103), a one-way gear (104), a T-shaped rack (105), meshing teeth (106) and a meshing spring (107); the base (1) is slidably connected with the trapezoidal unlocking strip (101), and the trapezoidal inclined surface at the top of the trapezoidal unlocking strip (101) is located below the connecting block; the base (1) is provided with a trapezoidal push rod (102), one end of the trapezoidal push rod (102) is fixedly connected to the inner wall of the base (1) with the return spring (103), and the upper surface of the trapezoidal push rod (102) is fixedly connected to the trapezoidal unlocking strip (101). 1) Contact connection, a one-way gear (104) is fixedly connected to the square rod (92), a T-shaped rack (105) is slidably connected to the inner wall of the base (1), the T-shaped rack (105) is meshed with the one-way gear (104), the top of the T-shaped rack (105) and the end of the trapezoidal top rod (102) away from the return spring (103) are in contact with each other, the bottom of the T-shaped rack (105) is slidably connected with a movable meshing tooth (106), a meshing spring (107) is installed at the sliding position between the meshing tooth (106) and the T-shaped rack (105), and the teeth of the meshing tooth (106) and the T-shaped rack (105) are parallel.

5. A shielding hydraulic support according to claim 4, characterized in that: The contact positions of the T-shaped rack (105) and the trapezoidal push rod (102) are both provided with inclined surfaces for mutual friction.

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