Mechanical manual lifting rod

Abstract

The invention discloses a mechanical manual lifting rod, and belongs to the technical field of medical instruments. Comprising a pull sleeve, a pin shaft, a pull cap, a pull rod, a guide outer sleeve, a guide ring, an inner pipe, an outer pipe, a connecting base, a hook and a fixing base. And the mechanical structure lifting part 2 comprises a supporting seat, a pressing sleeve, a compression spring, a positioning top bead and a limiting nut. The three positioning top beads are used in the positioning structure for positioning through the conical surface of the pressing sleeve, and the positioning is firmer and higher in bearing capacity compared with positioning through a thread jackscrew.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a mechanical manual lifting rod. Background Art

[0002] Lifting rods are widely used in emergency communication, temporary square lighting, video surveillance, lidar surveillance, medical, and engineering fields. Lifting rods usually come in pneumatic, hydraulic, and electric forms. Among them, pneumatic lifting rods require air compressors, gas storage tanks, gas distribution mechanisms, safety measures, etc., and hydraulic lifting rods require hydraulic stations, hydraulic oil distribution systems, etc. Electric lifting rods relatively have fewer auxiliary devices, smaller floor areas, lower costs, simpler maintenance work, and are safe and reliable in operation. Compared with pneumatic lifting rods, the disadvantage of electric lifting rods is that the lifting speed is slower due to limitations such as instantaneous power consumption and frictional heat.

[0003] Therefore, traditional mechanical lifting rods use a lead screw drive method for lifting, with a short lifting stroke and high costs. Lifting rods on the market are driven by motors, with high maintenance costs and potential safety hazards. Traditional lifting rods control lifting through thread or gear meshing transmission, resulting in a slow lifting speed. The lifting and positioning of lifting rods on the market are achieved through one or more electric actuators, with high costs. Summary of the Invention

[0004] In view of this, the present invention proposes a mechanical manual lifting rod. It uses a spring for positioning, has a faster lifting speed, and can achieve fast lifting and positioning at any position within the stroke.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A mechanical manual lifting rod, comprising an inner and outer tube positioning part 1 and a mechanical structure lifting part 2.

[0007] The inner and outer tube positioning part 1 includes a pull rod 104, an inner tube 107, and an outer tube 108; the inner tube 107 is located in the outer tube 108 and can freely slide along the central axis of the outer tube; a pull sleeve 101 is also sleeved on the inner tube, and the pull sleeve 101 is connected to the inner tube 107 through a pin shaft. The pin shaft 102 penetrates through the pull sleeve and the inner tube 107, and the inner tube has a guide groove for the up and down sliding of the pin shaft; the pull rod 104 is connected to the pin shaft 102, and the central axis of the pull rod coincides with the central axis of the inner tube.

[0008] The mechanical structure lifting part includes a support seat 201, a compression sleeve 202, a compression spring 203, and a positioning bead 204; the support seat is located in the outer tube 108 and is installed and fixed at the bottom of the inner tube 107; the compression sleeve 202 is installed at the bottom end of the pull rod; the spring is sleeved on the pull rod and is located between the compression sleeve and the support seat.

[0009] One side of the support base 201 is provided with an opening facing the inner wall of the outer tube; the positioning bead 204 is located at the opening position; the side wall of the pressing sleeve 202 has a taper, and the positioning bead abuts against the side wall of the pressing sleeve 202.

[0010] Further, the inner and outer tube positioning part 1 further includes a hook 110; the hook is located at the top of the inner tube 107 and is fixed by a fixing base 111.

[0011] Further, a connecting base 109 is provided at the bottom inside the outer tube, and a light hole for the pull rod 104 to move is provided on the connecting seat 109.

[0012] Further, the mechanical structure lifting part includes a limit nut 205, and the limit nut 205 is threadedly connected to the bottom of the pull rod; the pressing sleeve 202 is located on top of the limit nut.

[0013] Further, the inner and outer tube positioning part 1 further includes a pull cap 103; the pull cap 103 is sleeved on the pin shaft 102, and the top end of the pull rod is threadedly connected to the pull cap 103.

[0014] Further, the inner and outer tube positioning part 1 further includes a guide outer sleeve 105 and a guide ring 106. The guide ring is sleeved on the inner tube 107; part of the guide outer sleeve 105 is connected to the outer wall of the outer tube 108, and part presses the guide ring to guide the inner tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention uses the elastic force of a spring to position the lifting rod. In this way, a higher stroke can be achieved at a lower cost.

[0017] 2. Using a spring for positioning, the lifting speed is faster, and rapid lifting and positioning at any position within the stroke can be achieved.

[0018] 3. The present invention uses a mechanical structure to lift and position the lifting rod, which is safer, more reliable and lower in cost than an electric actuator control.

[0019] 4. Three positioning beads are used inside the positioning structure for positioning through the tapered surface of the pressing sleeve, which is more firm and has a higher bearing capacity than positioning through a threaded set screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Overall structure diagram of a mechanical manual lifting rod.

[0021] Figure 2 Cross-sectional view of the mechanical lifting structure.

[0022] Figure 3 Partial view of the state of the mechanical positioning structure part during lifting.

[0023] Figure 4 Partial view of the state of the mechanical positioning structure part during positioning. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be described completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] This application relates to a mechanical manual lifting rod, belonging to the field of medical devices, and includes an inner and outer tube positioning part and a mechanical structure lifting part.

[0026] Working principle:

[0027] The main purpose of the present invention is to provide a mechanical manual lifting rod.

[0028] To achieve the above purpose, the present invention provides a mechanical manual lifting rod, including an inner and outer tube positioning part 1, which includes a pull sleeve 101, a pin shaft 102, a pull cap 103, a pull rod 104, a guide outer sleeve 105, a guide ring 106, an inner tube 107, an outer tube 108, a connection base 109, a hook 110, and a fixed seat 111; a mechanical structure lifting part 2, which includes a support seat 201, a compression sleeve 202, a compression spring 203, a positioning top bead 204, and a limit nut 205.

[0029] The working principle of a mechanical manual lifting rod is as follows: When performing lifting control, it is necessary to pull up the pull sleeve 101, so that the pin shaft 102 in the pull sleeve 101 moves upward along the guide groove in the inner tube 107. The pull cap 103 is threadedly connected to the head end of the pull rod 104. The rising of the pull cap 103 cooperating with the pin shaft 102 drives the pull rod 104 to move upward synchronously. The limit nut 205 is threadedly connected to the end of the pull rod 104, and the pull rod 104 drives the limit nut 205 to move upward synchronously. The pressure sleeve 202, the support seat 201 and the pull rod 104 are on the same axis. The support seat 201 is in a fixed state under the downward force at the end of the inner tube 107 and the elastic force provided by the compression spring 203. The limit nut 205 supports the bottom of the pressure sleeve 202 to move upward. The compression spring 203 located inside the pressure sleeve 202 is compressed under the force of the support seat 201 and the pressure sleeve 202. After the pressure sleeve 202 rises, the force exerted on the positioning top bead 204 on its outer surface gradually decreases, and the force exerted by the positioning top bead 204 on the inner wall of the outer tube 108 decreases synchronously. The pull sleeve 101 drives the inner tube 107 to rise and fall. When the force applied to pull up the pull sleeve 101 is released, the compression spring 203 rebounds, the pressure sleeve 202 moves downward, and the positioning top bead 204 moves along the hole groove path in the support seat 201 after being subjected to the force of the tapered outer surface of the pressure sleeve 202 pressing outward. The force on the inner wall of the outer tube 108 by the positioning top bead 204 gradually increases, realizing the mechanical positioning of the lifting rod.

[0030] The inner and outer tube positioning part 1 serves to protect the internal structure of the lifting rod and can guide and fix the lifting rod. It includes a pull sleeve 101, a pin shaft 102, a pull cap 103, a pull rod 104, a guide outer sleeve 105, a guide ring 106, an inner tube 107, an outer tube 108, a connection base 109, a hook 110, and a fixed seat 111. The overall structure diagram of a mechanical manual lifting rod is as Figure 1 shown.

[0031] The pull sleeve 101 is used to limit the pin shaft 102 and plays a role in guiding and fixing. It has an interference fit with the pin shaft 102, and the pin shaft 102 can be pulled up through the pull sleeve 101. It can keep the pull rod 104 always coaxial with the inner tube 107.

[0032] The pin shaft 102 is used to fix the pull rod 104 together with the pull cap 103. When the pin shaft 102 is pulled up by the pull sleeve 101, it will drive the pull rod 104 to move upward synchronously.

[0033] The pull cap 103 is used to fix the pin shaft 102 and the pull rod 104. It is radially connected to the pin shaft 102 and is fixed to the pull rod 104 through a threaded connection. When the pin shaft 102 moves upward, the pull cap 103 drives the pull rod 104 to move upward synchronously.

[0034] The pull rod 104 is fixedly connected to the pull cap 103 and the limit nut 205 by threads. When the pull sleeve 101 is lifted, the pull sleeve 101 drives the pull rod 104, the pull cap 103 and the limit nut 205 to move synchronously through the pin shaft 102 and the pull cap 103, realizing the lifting of the lifting rod.

[0035] The guiding outer sleeve 105 presses on the outer tube 108 and the guiding ring 106. Pressing the guiding ring 106 and the outer tube 108 to prevent the lifting rod from being damaged due to the movement of the guiding ring 106 along with the inner tube 107 during operation.

[0036] The guiding ring 106 positions the inner tube 107, keeping the inner tube 107 and the outer tube 108 always coaxial.

[0037] The inner tube 107 is fixed with the hook 110 and the fixed seat 111. The pin shaft 102 moves in the stroke slot at the head end of the inner tube 107 for operation. The inner tube 107 provides support for the support seat 201.

[0038] The outer tube 108 is fixedly connected to the inner tube 107 through the guiding ring 106 and supports the inner tube 107 and the internal parts. The force transmitted through the compression sleeve 202 causes the positioning ball 204 to exert pressure on the inner wall of the outer tube 108, restricting the movement of the inner tube 107.

[0039] The connecting base 109 is located at the end of the lifting rod. The connecting base 109 is threadedly mated with the external structure to fix the lifting rod. The connecting base 109 is in transitional fit with the outer tube 108.

[0040] The hook 110 is located at the head end of the inner tube 107 and is fixedly connected to the inner tube 107 through the fixed seat 111, and is used for hanging liquid bags, blood transfusion bags, etc.

[0041] The fixed seat 111 is located at the head end of the inner tube 107 and fixes the two hooks 110 at the head end position of the inner tube 107 through radial connection.

[0042] The mechanical structure lifting part 2 functions to lift the pull rod 104, so that the compression spring 203 is compressed by the compression sleeve 202 and the support seat 201, realizing the free lifting of the lifting rod. It includes the support seat 201, the compression sleeve 202, the compression spring 203, the positioning ball 204, and the limit nut 205. The cross-sectional view of the mechanical lifting structure is as Figure 2 shown.

[0043] The support seat 201 is located at the end of the inner tube 107 and is in interference fit with the inner tube 107. The purpose is to limit the top of the compression spring 203 and cooperate with the compression sleeve 202 during operation to compress the compression spring 203.

[0044] The pressure sleeve 202 is located above the limit nut 205, supports the bottom of the compression spring 203, and compresses the compression spring 203 in cooperation with the support seat 201 during operation. It supports the positioning top bead 204.

[0045] The compression spring 203 is located between the support seat 201 and the pressure sleeve 202. After the lifting stops, using its resilience, an outward force is applied to the positioning top bead 204 along the hole groove of the support seat 201 through the pressure sleeve 202, and the force on the inner wall of the outer tube 108 by the positioning top bead 204 gradually increases, realizing the mechanical positioning of the lifting rod.

[0046] The positioning top bead 204 is located in the hole groove of the support seat 201. When the pressure sleeve 202 moves upward, the positioning top bead 204 relaxes, and the inner tube 107 can freely lift and lower; after the lifting is completed, the pressure sleeve 202 descends, and its outer conical surface applies an outward force to the positioning top bead 204, realizing the positioning of the lifting rod.

[0047] The limit nut 205 is located at the end of the pull rod 104 and is fixedly connected to the pull rod 104 by thread, supports the pressure sleeve 202, and prevents the compression spring 203 from pressing out the pressure sleeve 202, causing the failure of the function of the lifting rod.

[0048] [[ID=]12]This embodiment can realize two states of the mechanical structure positioning part during the lifting and positioning of the lifting rod.

[0049] State of the mechanical positioning structure part during lifting: The pull rod 104 and the limit nut 205 are fixedly connected by thread. When the lifting rod works, the limit nut 205 is lifted through the pull rod 104. The pressure sleeve 202 above the limit nut 205 and the support seat 201 restricted by the end of the inner tube compress the middle compression spring 203. The outer conical surface diameter of the pressure sleeve 202 where the positioning top bead 204 is located gradually decreases, the positioning top bead 204 relaxes, and the inner wall of the outer tube 108 loses the radial force given by the positioning top bead 204, and the inner tube 107 can freely lift and lower. The partial view of the state of the mechanical positioning structure part during lifting is as Figure 3 shown.

[0050] State of the mechanical positioning structure part during positioning: After the lifting stops, release the lifting of the pull sleeve 101. Using the resilience of the compression spring 203, an outward force is applied to the positioning top bead 204 along the hole groove of the support seat 201 through the pressure sleeve 101, and the force on the inner wall of the outer tube 108 by the positioning top bead 204 gradually increases, realizing the mechanical positioning of the lifting rod. The partial view of the state of the mechanical positioning structure part during positioning is as Figure 4 shown.

Claims

1. A mechanical manual lifting rod, comprising an inner and outer tube positioning part (1) and a mechanical structure lifting part (2), characterized in that, the inner and outer tube positioning part (1) includes a pull rod (104), an inner tube (107) and an outer tube (108); the inner tube (107) is located in the outer tube (108) and can freely slide along the central axis of the outer tube; a pull sleeve (101) is also sleeved on the inner tube, and the pull sleeve (101) is connected to the inner tube (107) through a pin shaft. The pin shaft (102) penetrates through the pull sleeve and the inner tube (107), and the inner tube is provided with a guide groove for the up and down sliding of the pin shaft; the pull rod (104) is connected to the pin shaft (102), and the central axis of the pull rod coincides with the central axis of the inner tube; the mechanical structure lifting part includes a support seat (201), a compression sleeve (202), a compression spring (203) and a positioning bead (204); the support seat is located in the outer tube (108) and is installed and fixed at the bottom of the inner tube (107). The support seat is provided with a through hole for the pull rod to pass through; the compression sleeve (202) is installed at the bottom end of the pull rod; the spring is sleeved on the pull rod and is located between the compression sleeve and the support seat; one side of the support seat (201) is provided with an opening facing the inner wall of the outer tube; the positioning bead (204) is located at the opening position; the side wall of the compression sleeve (202) has a taper, and the positioning bead abuts against the side wall of the compression sleeve (202).

2. The mechanical manual lifting rod according to claim 1, wherein the inner and outer tube positioning part (1) further includes a hook (110); the hook is located at the top of the inner tube (107) and is fixed through a fixing seat (111).

3. A mechanical manual lifting rod according to claim 1, characterized in that, A connecting base (109) is provided at the bottom inside the outer tube, and the connecting seat (109) is provided with a light hole for the movement of the pull rod (104).

4. A mechanical manual lifting rod according to claim 1, characterized in that, the mechanical structure lifting part includes a limit nut (205), and the limit nut (205) is threadedly connected to the bottom of the pull rod; the compression sleeve (202) is located on top of the limit nut.

5. A mechanical manual lifting rod according to claim 1, characterized in that, the inner and outer tube positioning part (1) further includes a pull cap (103); the pull cap (103) is sleeved on the pin shaft (102), and the top end of the pull rod is threadedly connected to the pull cap (103).

6. A mechanical manual lifting rod according to claim 1, characterized in that the inner and outer tube positioning part (1) further includes a guide outer sleeve (105) and a guide ring (106). The guide ring is sleeved on the inner tube (107); part of the guide outer sleeve (105) is connected to the outer wall of the outer tube (108), and part presses the guide ring to guide the inner tube.

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