TWM539853U - Table board angle adjustment device by self-weight slowly descending - Google Patents

Description

Self-weight descending table angle adjustment device

This creation is related to the adjustment of the angle of the table.

It is known that the angle adjustment of the table can be controlled by a telescopic piston rod of an oil cylinder. 1 is a cross-sectional view showing a conventional oil pneumatic cylinder in which a compressed air 11 and a hydraulic oil 12 are mainly disposed in a cylinder 10 in a manner of gas-down oil, and a piston rod 13 and a valve block 14 thereof are inserted into the cylinder 10 The valve block 14 includes a valve seat 15 fixed to the end of the piston rod 13, and is disposed in the piston rod 13 and the valve seat 15 and is receivable by an actuator (not shown). a valve stem 16 that moves up and down, and a valve plug 17 that is vertically movable in the valve seat 15, and the valve plug 17 is provided with a first-stage passage 18, and the valve seat 15 is provided with an oil hole 19 corresponding to the flow passage 18. In the case where the piston rod 13 and the valve stem 16 are stationary, the valve plug 17 is retracted into the valve seat 15 by the action of the bottom hydraulic oil, and the flow passage 18 is closed. When the valve stem 16 is displaced downward by the action of the actuating member, the valve plug 17 is controlled to be displaced downward, the flow passage 18 extends out of the bottom of the valve seat 15, and the hydraulic oil 12 can pass through the oil hole 19 and the flow passage. The flow of 18 causes the piston rod 13 to perform a stroke of moving up and down.

The above oil-pneumatic cylinder controls the angle adjustment of the table to cause the following problem: no matter whether the table angle is adjusted upward or downward, the user has to control the actuator with one hand, so that the piston rod 13 can perform the movement of moving up and down, and the other One hand is required to apply an external force to the table to control the angle of the table. However, if the external force applied by the user to the table is insufficient or no external force is applied The pressure of the hydraulic oil on the table will cause the piston rod to quickly rush to the highest point and the table will instantly rush to the maximum angle. At this time, the user must press the table from the maximum angle of the table to move down to the intended angle. Very inconvenient. When pressing the table down, you should also pay attention to the angle limit of the downward adjustment and the strength applied to the table. The strength is insufficient and the angle cannot be adjusted. However, if the table is pressed with excessive force, the piston rod displacement reaches the liquid-gas threshold. In the position, the piston rod will stall down due to the loss of hydraulic oil and the table will fall down instantly. In short, it is quite inconvenient to control the angle of the table board with the above oil pressure cylinder and it is difficult to accurately control.

What the present invention is to solve is the problem that occurs when the oil pneumatic cylinder control table angle adjustment described in the prior art is performed.

The invention relates to an automatic descending table angle adjusting device, comprising: a pressure cylinder comprising a cylinder body, the outer end of the cylinder body is connected to a table frame by a variable angle lower positioning group, and the inner part of the cylinder body is provided a hydraulic oil; the inside of the cylinder has a piston rod movable up and down, the top end of the piston rod extends out of the cylinder, the piston rod is connected to a table by an upper positioning group, and the table and the table frame pass through a variable angle pivot connection; a valve block comprising a valve seat fixed at the end of the piston rod and located in the hydraulic oil, a valve plug extending through the valve seat and movable up and down, a valve stem in the piston rod and controlled by an actuator to be vertically displaced; the valve plug is externally provided with a first flow passage, the valve seat is provided with at least one oil hole corresponding to the first flow passage; and the valve seat is provided with at least one through a second flow path of the bottom of the valve seat and the outer side wall; the valve seat forms a gap between the outer side wall above the second flow path and the inner wall of the piston rod; the outer side wall of the valve seat is opposite to the second flow path An oil seal groove is provided, and the opening of the second flow passage through the outer side wall of the valve seat is located at the Upper seal groove, a seal is located in the outer seal groove, an outer seal which can be Moving in the oil seal groove to close or release the opening of the second flow channel; further, the inside of the cylinder is provided with compressed air and hydraulic oil, and the compressed air is above the hydraulic oil.

Further, the upper positioning group comprises a plate member and a pivoting seat, the plate member and the bottom of the pivoting seat are respectively provided with a fixing hole, the top end of the piston rod is provided with a threaded section, and a nut is worn, And locking the plate and the fixing hole of the pivot seat.

Further, the two sidewalls of the pivoting seat are provided with a pair of table pivot holes for pivoting a pivotal surface disposed on the bottom surface of the table to form a variable angle connection between the table and the pivoting seat.

Further, the actuator includes an actuating member, a cable, a cable through tube, and a control member; the actuating member contacts a top end of the valve stem, and the actuator has a pivot at one end thereof Rotatablely connected to the two side walls of the pivot seat, the other end of the actuating member is connected to the cable, the cable extends through the cable through tube, and the terminal is connected to the control member; the control member passes the cable The actuator is pulled down to actuate the valve stem to move downward in the piston rod.

The effect of this creation: When the table angle is raised, the user pulls up the table; when the table angle is lowered, the user controls the actuator, and the piston rod is moved downward by the weight of the table, and the angle of the table is lowered and lowered.

The user adjusts the angle of the table by pulling the table up, and by using the technical characteristics of the table board to reduce the angle of the table, the prior art user needs to control the actuator with one hand and the other table. However, the angle adjustment is not easy, and the pressure of the cylinder is improperly caused to cause the problem of being out of control when the angle is adjusted on the table. Compared with the prior art, this creation adjusts the angle of the table top and bottom conveniently and easily, and can effectively control the adjustment of the table to The angle the user intended.

10‧‧‧Cylinder

11‧‧‧Compressed air

12‧‧‧Hydraulic oil

13‧‧‧ piston rod

14‧‧‧ valve group

15‧‧‧ valve seat

16‧‧‧ valve stem

17‧‧‧ valve plug

18‧‧‧ flow path

19‧‧‧ oil hole

30‧‧‧Cylinder

31‧‧‧Table stand

32‧‧‧Lower positioning group

33‧‧‧Table board

34‧‧‧Upper positioning group

36‧‧‧Actuator

37‧‧‧ pivot

41‧‧‧Cylinder block

42‧‧‧Compressed air

43‧‧‧Hydraulic oil

44‧‧‧ piston rod

45‧‧‧Threaded section

46‧‧‧ nuts

51‧‧‧Valve Group

52‧‧‧ valve seat

53‧‧‧ valve stem

54‧‧‧ valve plug

55‧‧‧First runner

56‧‧‧ oil hole

57‧‧‧Second runner

58‧‧‧ oil seal slot

59‧‧‧External oil seal

60‧‧‧ gap

71‧‧‧ boards

72‧‧‧ pivot

73‧‧‧Fixed holes

74‧‧‧Fixed holes

75‧‧‧Table hole

76‧‧‧ pivot

81‧‧‧Accelerator

82‧‧‧ cable

83‧‧‧ Cable threading

84‧‧‧Controls

85‧‧‧ pivot

Figure 1 is a cross-sectional view of a conventional pressure cylinder applied to the adjustment of the angle of the table.

Figure 2 is an external view of the device of the creation.

Figure 3 is a side elevational view of the combination of the device and the table.

Figure 4 is a bottom view of the combination of the device and the table.

Figure 5 is an exploded perspective view of the device of the present invention.

Figure 6 is a perspective cross-sectional view of the valve seat of the device of the present invention.

Figure 7 is a cross-sectional view of the device of the present invention in a stationary state.

Figure 8 is a cross-sectional view of the table top angle of the device of the present invention.

Figure 9 is a cross-sectional view showing the angle of the table under the creation of the device.

Figure 10 is a side elevational view of the apparatus for adjusting the angle of the table top and bottom.

For the convenience of the description, the central idea expressed in the column of the above novel content is expressed by a specific embodiment. Various items in the embodiments are depicted in terms of ratios, dimensions, amounts of deformation, or displacements that are suitable for illustration, and are not drawn to scale of actual components.

As shown in Figures 2, 3 and 4, the present invention relates to a table for adjusting the angle of the table, comprising a pressure cylinder 30, a positioning group 32 for positioning the end of the pressure cylinder 30 under a variable angle of a table frame 31, and The piston rod 44 of the cylinder 30 is coupled to a table 33 by a variable angle upper positioning group 34, an actuator 36 coupled to the valve stem 53 of the cylinder 30. The table 33 is provided with a variable angle pivot 37 on one side of the user, and the table 33 is angled with respect to the pivot 37 when the angle is adjusted.

As shown in Figures 2, 5, 6, and 7, with respect to the cylinder 30, the compressed air 42 and the hydraulic oil 43 are mainly disposed in a cylinder 41 in a gas-oiled manner, and the piston rod 44 and its valve block 51 are extended. The cylinder 41 is inserted into the hydraulic oil 43. The top end of the piston rod 44 extends beyond the cylinder 41 to connect the upper positioning group 34. The upper positioning group 34 includes a plate member 71 and a pivoting seat 72. The bottom plate of the plate member 71 and the pivoting seat 72 are provided with a fixing hole 73, 74. The top end of the piston rod 44 is provided with a threaded portion 45. The nut 46 locks the plate member 71 and the fixing holes 73, 74 of the pivot seat 72 from below. The two side walls of the pivoting seat 72 are provided with a pair of table pivot holes 75 for pivoting a pivot shaft 76 disposed on the bottom surface of the table top 33 to form a variable angle connection between the table top 33 and the pivoting seat 72.

The valve block 51 includes a valve seat 52 fixed to a bottom end of the piston rod 44, a valve rod 53 that is vertically movable through the piston rod 44, an actuator 81 that controls the valve rod 53 to move up and down, and a threading device A valve plug 54 that can move up and down in the valve seat 52.

The actuator 36 includes an actuator 81, a cable 82, a cable feedthrough 83, and a control member 84 (described in Figure 8). The actuating member 81 is located in the pivoting seat 72 of the upper positioning group 34. One end of the actuating member 81 is rotatably coupled to the two side walls of the pivoting seat 72 by a pivot 85, and the actuating member 81 is further The cable 82 is connected at one end, and the cable 82 extends through the cable penetration tube 83, and the terminal is connected to the control member 84. The control member 84 is controlled by the user to press the control member 84. The cable 82 pulls the actuator member 81 downward to urge the valve stem 53 to move downward in the piston rod 44.

The valve pin 54 is externally provided with a first flow path 55. The valve seat 52 is provided with at least one oil hole 56 corresponding to the first flow path 55. The valve seat 52 is provided with at least one second flow path extending through the bottom and outer side walls of the valve seat 52. The valve seat 52 forms a gap 60 between the outer side wall above the second flow path 57 and the inner wall of the piston rod 44; the outer side wall of the valve seat 52 is provided with an oil seal groove relative to the second flow path 57. The opening of the second flow passage 57 through the outer side wall of the valve seat 52 is located on the upper side of the oil seal groove 58, and an outer oil seal 59 is located. In the oil seal groove 58, the outer oil seal 59 can move in the oil seal groove to close or release the opening of the second flow path 57.

As shown in Fig. 7, in the case where the piston rod 44 and the valve stem 53 are stationary, the valve pin 54 is retracted into the valve seat 52 by the pressure of the bottom hydraulic oil 43, and the first flow passage 55 is closed. The outer oil seal 59 is located above the oil seal groove 58 and closes the second flow path 57. The hydraulic oil 43 does not flow in the valve seat 52, maintaining oil pressure to support the piston rod 44 in a rest position, the piston rod 44 supporting the table 33 to maintain a predetermined angle.

As shown in Fig. 8, the angle of the table 33 is adjusted upward, and the user applies a force to pull up the table 33. When the piston rod 44 moves upward with the table 33, the valve pin 54 is subjected to the bottom hydraulic oil 43. The pressure acts to contract into the valve seat 52, the first flow passage 55 is closed, the outer oil seal 59 is moved to the lower side of the oil seal groove 58, the second flow passage 57 is opened, and the hydraulic oil 43 above the valve seat 52 The second flow passage 57 can be entered through the gap 60 to flow below the valve seat 52, so that the piston rod 44 can smoothly move up with the table 33 until the user stops pulling the table 33, the table The weight of the plate 33 causes the piston rod 44 to move slightly downward by a slight distance. The slight distance only moves the outer oil seal 59 from the lower side of the oil seal groove 58 to the upper side to seal the second flow path 57. The hydraulic oil 43 There is no flow in the valve seat 52, maintaining oil pressure to support the piston rod 44 in a rest position, the piston rod 44 supporting the table 33 to remain at a predetermined angle.

As shown in Fig. 9, in order to adjust the angle of the table 33 downward, the user does not need to apply force to the table 33, as long as the control member 84 of the actuator 36 is operated, the actuator 81 is pulled by the cable 82. Pressing down causes the valve stem 53 to move downward in the piston rod 44. The valve plug 54 controls the valve stem 53 to be displaced downward. The first flow passage 55 extends out of the bottom of the valve seat 52, and the outer oil seal 59 moves. The second flow passage 57 is sealed to the oil seal groove 58. The hydraulic oil 43 below the valve seat 52 passes through the first flow passage 55 and the oil hole 56. The valve seat 52 flows upwards, so that the piston rod 44 is slowly moved downward by the weight of the table 33, and the angle is adjusted downward until the user desires the angle. The user releases the control member 84. The bottom hydraulic oil 43 is retracted into the valve seat 52. The first flow passage 55 is closed. The outer oil seal 59 is located above the oil seal groove 58 to close the second flow passage 57. The hydraulic oil 43 does not flow in the valve seat 52, maintaining oil pressure to support the piston rod 44 in a rest position, the piston rod 44 supporting the table 33 to maintain a predetermined angle.

Fig. 10 depicts the upper positioning group 34 and the lower positioning group 32 of the angle changeable when the table top 33 is adjusted up and down, and the cylinder 30 also changes in corresponding angle.

41‧‧‧Cylinder block

42‧‧‧Compressed air

43‧‧‧Hydraulic oil

44‧‧‧ piston rod

45‧‧‧Threaded section

46‧‧‧ nuts

51‧‧‧Valve Group

52‧‧‧ valve seat

53‧‧‧ valve stem

54‧‧‧ valve plug

55‧‧‧First runner

56‧‧‧ oil hole

57‧‧‧Second runner

58‧‧‧ oil seal slot

59‧‧‧External oil seal

60‧‧‧ gap

71‧‧‧ boards

72‧‧‧ pivot

75‧‧‧Table hole

81‧‧‧Accelerator

82‧‧‧ cable

83‧‧‧ Cable threading

85‧‧‧ pivot

Claims (5)

A self-weight descending table angle adjusting device comprises: a pressure cylinder comprising a cylinder body, wherein an outer end of the cylinder body is connected to a table frame by a variable angle lower positioning group, and the cylinder body is provided with hydraulic oil The inside of the cylinder has a piston rod movable up and down, the top end of the piston rod extending out of the cylinder, the piston rod is connected to a table by an upper positioning group, and the table and the table frame are passed through a variable a pivotal connection of the angle; a valve block including a valve seat fixed at the end of the piston rod and located in the hydraulic oil, a valve plug that is inserted into the valve seat and movable up and down, and is disposed on the piston rod a valve stem that is controlled to be vertically displaced by an actuator; the valve plug is externally provided with a first flow passage, the valve seat is provided with at least one oil hole corresponding to the first flow passage; and the valve seat is provided with at least one through the valve seat a second flow path of the bottom and the outer side wall; the valve seat forms a gap between the outer side wall above the second flow path and the inner wall of the piston rod; the outer side wall of the valve seat is opposite to the second flow path An oil seal groove, wherein the opening of the second flow passage through the outer side wall of the valve seat is located in the oil seal groove Above, an outer oil seal is located in the oil seal groove, and the outer oil seal can move in the oil seal groove to close or release the opening of the second flow channel; by the above configuration, the user pulls the table plate upward, and the hydraulic oil passes through The gap and the second flow path flow below the valve seat, the piston rod and the valve group are displaced upwards following the table, thereby up-regulating the table angle; the actuator controls the valve plug to move down, Hydraulic oil flows through the oil hole and the first flow passage to the valve seat, and the piston rod is automatically moved down by the weight of the table plate to lower the table angle; the first flow passage and the second flow passage When the flow passages are closed, the hydraulic oil does not flow in the valve seat, the hydraulic oil supports the piston rod and the valve block in a rest position, and the table is kept at Predetermined angle. The self-weight descending table angle adjusting device according to claim 1, wherein the inside of the cylinder is provided with compressed air and hydraulic oil, and the compressed air is above the hydraulic oil. The self-weight descending table angle adjusting device according to claim 1, wherein the upper positioning group comprises a plate member and a pivot seat, and the bottom plate of the plate member and the pivot seat is provided with a fixing hole, and the top end of the piston rod A threaded section is disposed, and a nut is inserted to lock the plate member and the fixing hole of the pivoting seat from bottom to top. The self-weight descending table angle adjusting device according to claim 3, wherein the two side walls of the pivoting seat are provided with a pair of table pivot holes, and a pivotal pivoting hole is disposed on the bottom surface of the table to form the table and A connection of variable angles between the pivots. The self-weight descending table angle adjusting device according to claim 3, wherein the actuator comprises an actuating member, a cable, a cable through tube, and a control member; the actuating member contacts the valve stem The top end of the actuating member is pivotally connected to the two side walls of the pivoting seat, and the other end of the actuating member is connected to the cable, and the cable penetrates the cable through the tube. The terminal is connected to the control member; the control member pulls the actuating member downward by the cable to actuate the valve stem to move downward in the piston rod.