Expanding and contracting mobile device

Abstract

An expansion and contraction moving device includes a guide rod, a screw rod, a connecting rod assembly, a fixing nut, and a pushing nut. The screw rod is sleeved on the guide rod and can slide on the guide rod; the connecting rod assembly includes an upper support and a lower support installed on the screw rod, a connecting rod contraction arm, and a mounting block connected to the extended end of the connecting rod contraction arm and used to install the workpiece to be moved; the fixing nut is used to fix the position of the screw rod on the guide rod; the pushing nut is adapted to the screw rod; the connecting rod contraction arm includes an upper connecting rod hinged to the upper support, a lower connecting rod hinged to the lower support, and the extended ends of the connecting rod hinged to the upper connecting rod and the lower connecting rod respectively; the pushing nut pushes the lower support to slide upward on the screw rod so that the extended end of the connecting rod of the connecting rod contraction arm retracts inward, and the pushing nut slides downward on the screw rod so that the extended end of the connecting rod of the connecting rod contraction arm expands outward. This moving device can well adjust the position of the curing agent delivered to the mixing container during the mixing process, and can better mix it evenly.

Description

Technical Field

[0001] The invention belongs to the field of moving workpiece devices, and in particular relates to an expansion and contraction moving device. Background Art

[0002] The gel casting process is a new ceramic molding technology invented by Oak Ridge National Laboratory in the United States in the early 1990s by combining traditional ceramic molding technology and polymer technology. Usually, an acrylamide water-based gel system is used, and its basic composition is a mixed liquid formed by an organic monomer-acrylamide (C2H3CONH2, AM) and an appropriate amount of cross-linking agent N,N'-methylenebisacrylamide (C2H3CONH2CH2, MBAM). A cross-linking reaction occurs under the action of a catalyst N,N,N',N'-tetramethylethylenediamine (TEMED) and a curing agent ammonium persulfate ((NH4)2S2O8, APS): the curing agent APS decomposes to form primary free radicals and becomes monomer free radicals with the monomer. The reaction activation energy is low, and the generated primary free radicals quickly generate monomer free radicals, but there are many side reactions in the initiation reaction stage, which consume the curing agent and make the curing agent inefficient. Primary free radicals will also quickly react with some inhibitory substances and lose their reactivity. Oxygen is an obvious inhibitor. Oxygen and free radicals generate relatively inactive peroxyl radicals. The peroxyl radicals themselves combine with other free radicals and terminate, and can no longer trigger a gel reaction to form a three-dimensional network structure (oxygen inhibition effect).

[0003] If oxygen in the air is wrapped into the slurry, it will affect the solidification of the surrounding slurry and pores, thus causing defects in the green body after solidification. Therefore, the chain initiation reaction is the key to controlling the entire polymerization reaction and the main factor affecting the molecular weight of the polymerization system. Especially for gel casting slurry, when the slurry viscosity is greater than 5Pa·S, the slurry fluidity is poor, so there are the following problems: during the curing agent addition process, due to the high viscosity of the slurry, it cannot be dispersed into the entire slurry in time, resulting in excessive or insufficient concentration in the local area, resulting in inconsistent slurry gel, which causes defects in the green body after solidification, seriously affecting the green body quality.

[0004] Furthermore, in the prior art, when adding curing agent, there is no movable component that can adjust the position of the curing agent dripping into the stirring container, so that when stirring the curing agent, the curing agent dripping into the stirring container is unevenly distributed, resulting in uneven stirring. Summary of the invention

[0005] The present invention aims to solve one of the above problems; it provides an expansion and contraction moving device, which is implemented in the following manner:

[0006] An expansion and contraction moving device, comprising: a connecting rod assembly, the connecting rod assembly comprising an upper support and a lower support mounted on the screw rod, a connecting rod contraction arm, a connecting rod contraction arm connecting the upper support and the lower support, and a mounting block connected to the connecting rod contraction arm and used for mounting a workpiece to be moved;

[0007] The connecting rod retractable arm expands as the distance between the upper support and the lower support becomes closer, and contracts as the distance between the upper support and the lower support becomes larger.

[0008] Preferably, it further comprises a screw rod and a guide rod, wherein the screw rod is sleeved on the guide rod and can slide on the guide rod. The expansion of the connecting rod retractable arm is its movement away from the screw rod, and the contraction of the connecting rod retractable arm is its movement towards the screw rod.

[0009] Preferably, it also includes a fixing nut and a pushing nut threadedly connected to both ends of the screw rod; the upper support and the lower support are respectively in contact with the fixing nut and the pushing nut.

[0010] Preferably, the connecting rod retracting arm includes an upper connecting rod hinged to the upper support, a lower connecting rod hinged to the lower support, and a connecting rod extending end hinged to the upper connecting rod and the lower connecting rod, respectively.

[0011] Preferably, an upper thread matched with the fixing nut is provided at the upper end of the screw rod, a lower thread matched with the pushing nut is provided at the lower end of the screw rod, and the middle part of the screw rod is a smooth rod wall for sliding of the lower support.

[0012] Preferably, a longitudinally arranged fixing groove is opened on the rod wall of the upper thread, and the fixing nut reinforces the installation of the screw rod and the guide rod through the fixing groove.

[0013] Preferably, a longitudinally arranged pre-tightening groove is opened on the rod wall of the lower thread, and the pushing nut is used to push the lower support to move upward.

[0014] Preferably, the connecting rod retractable arms are at least two groups in number and are evenly arranged around the screw rod.

[0015] Preferably, the connecting rod extending end comprises a connecting rod having one end hinged to the upper connecting rod and the lower connecting rod, and the other end of the connecting rod is connected to the mounting block.

[0016] Preferably, the extending end of the connecting rod includes an articulated rod and a connecting rod; one end of the articulated rod is hinged to the upper connecting rod, and the other end is hinged to the lower connecting rod; the connecting rod is respectively arranged at the hinged end of the articulated rod and is hinged to the articulated rod.

[0017] Preferably, the length of the upper connecting rod is longer than that of the lower connecting rod.

[0018] Preferably, the mounting block is provided with a mounting hole for mounting the workpiece to be moved.

[0019] Preferably, the guide rod is hollow inside.

[0020] Beneficial effects: The system can ensure that the curing agent can be added continuously and quantitatively during the curing agent addition process. By adjusting the position of the delivery pipe, it is possible to avoid the oxygen in the air from being drawn into the high-viscosity slurry during the curing agent addition process. The device can select the best addition position according to the different sizes of slurry stirring containers to ensure uniform dispersion of the curing agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional diagram of a connecting rod assembly according to an embodiment of the present invention;

[0022] Figure 2 is an exploded view of an embodiment of the present invention;

[0023] Figure 3 It is an enlarged diagram of the screw rod connection relationship of an embodiment of the present invention;

[0024] Figure 4 It is a three-dimensional diagram of an embodiment of the present invention. Description of the drawings:

[0026] Guide rod 1; connecting rod assembly 2; upper support 21; lower support 22; connecting rod retracting arm 23; upper connecting rod 231; lower connecting rod 232; connecting rod extending end 233; hinged rod 2331; connecting rod 2332; mounting block 24; fixing nut 3; pushing nut 4; screw rod 5; upper thread 51; fixing groove 511; lower thread 52; pre-tightening groove 521; stirring container 6; stirring assembly 7; stirring paddle 71; rotating rod 72; power supply motor 73; conveying assembly 8; conveying pipe 81; curing agent metering pump 82; guide pipe 83; waste integrated box 9. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] like Figure 1-Figure 4As shown, an expansion and contraction moving device includes a guide rod 1, a screw rod 5, a connecting rod assembly 2, a fixing nut 3, a pushing nut 4, and a connecting rod assembly 2, wherein the connecting rod assembly 2 includes an upper support 21 and a lower support 22 installed on the screw rod 5, a connecting rod contraction arm 23, the connecting rod contraction arm 23 connecting the upper support 21 and the lower support 22, and a mounting block 24 connected to the connecting rod contraction arm 23 and used for mounting a workpiece to be moved;

[0029] The connecting rod retractable arm 23 expands as the distance between the upper support 21 and the lower support 22 approaches, and contracts as the distance between the upper support 21 and the lower support 22 increases. The expansion of the connecting rod retractable arm 23 is its movement away from the screw rod 5, and the contraction of the connecting rod retractable arm 23 is its movement towards the screw rod 5.

[0030] Among them, the screw rod 5 is sleeved on the guide rod 1 and can slide on the guide rod 1; the connecting rod assembly 2 includes an upper support 21 and a lower support 22 installed on the screw rod 5, a connecting rod retraction arm 23, and a mounting block 24 connected to the protruding end of the connecting rod retraction arm 23 and used to install the workpiece to be moved; the fixing nut 3 is used to fix the position of the screw rod 5 on the guide rod 1; the pushing nut 4 is adapted to the screw rod 5; the connecting rod retraction arm 23 includes an upper connecting rod 231 hinged to the upper support 21, a lower connecting rod 232 hinged to the lower support 22, and a connecting rod protruding end 233 hinged to the upper connecting rod 231 and the lower connecting rod 232 respectively; the pushing nut 4 pushes the lower support 22 to slide upward on the screw rod 5 so that the connecting rod protruding end 233 of the connecting rod retraction arm 23 retracts inward, and the pushing nut 4 slides downward on the screw rod 5 so that the connecting rod protruding end 233 of the connecting rod retraction arm 23 expands outward.

[0031] The specific structural relationship between the screw rod 5, the connecting rod assembly 2, the fixing nut 3 and the pushing nut 4 is as follows: the fixing nut 3 fastens the screw rod 5 and the guide rod 1 by rotating on the screw rod 5, that is, the fixing nut 3 rotates on the screw rod 5 to press the rod wall of the screw rod 5 toward the guide rod 1 until the two are pressed tightly, and at this time, the friction between the screw rod 5 and the guide rod 1 is sufficient to fix the screw rod 5 on the guide rod 1. After the fixing nut 3 fixes the screw rod 5, the pushing nut 4 is rotated. In order to enable the pushing nut 4 to push the lower support 22 upward, the pushing nut 4 is arranged below the lower support 22. Since the lower support 22 is sleeved and installed on the screw rod 5, the sleeve installation described here can be that the inner diameter of the lower support 22 is slightly larger than the diameter of the screw rod 5 or the position of the screw rod 5 for sleeved lower support 22 is a smooth wall surface, so when the pushing nut 4 rotates upward, the lower support 22 is pushed to move upward by a moving distance. For the connecting rod assembly 2 controlled by the lower support 22 for contraction and expansion, the connecting rod retraction arm 23 is the main working part, wherein when the lower support 22 moves upward to the limit, the upper connecting rod 231 is pressed downward and gathers toward the screw rod 5, and the lower connecting rod 232 retracts inward and upward. The inward here refers to the direction of the screw rod 5, and the upward here refers to that the hinged end of the lower connecting rod 232 and the lower support 22 is higher than the other end of the lower connecting rod 232. At this time, the connecting rod retraction arm 23 of the expansion and contraction moving device is in a retracted state, because the lower connecting rod 232 retracts inward and does not support the connecting rod retraction arm 23, the connecting rod protruding end 233 is also in a retracted state, that is, the connecting end of the connecting rod protruding end 233 and the mounting block 24 is lower than the other end of the connecting rod protruding end 233. The pushing nut 4 rotates downward. When the lower support 22 rotates downward to the limit, the upward limit and the downward limit mentioned here both refer to the situation that the pushing nut 4 cannot be separated from the thread on the screw rod 5. The lower connecting rod 232 supports the entire connecting rod retraction arm 23 under the trend of gravity, that is, the hinged end of the lower connecting rod 232 and the lower support 22 and the other end gradually approach the horizontal direction during the gradual decline of the lower support 22. The lower connecting rod 232 supports the entire connecting rod retraction arm 23 to expand outward, and the connecting rod 2332 also moves outward accordingly, and the rotation direction of the connecting rod 2332 also gradually approaches the horizontal direction and rotates slowly.

[0032] In a preferred embodiment, an upper thread 51 adapted to the fixing nut 3 is provided at the upper end of the screw rod 5, a lower thread 52 adapted to the pushing nut 4 is provided at the lower end of the screw rod 5, and the middle portion of the screw rod 5 is a smooth rod wall for the sliding of the lower support 22.

[0033] In a preferred embodiment, a longitudinally arranged fixing groove 511 is opened on the rod wall of the upper thread 51 , and the fixing nut 3 reinforces the installation of the screw rod 5 and the guide rod 1 through the fixing groove 511 .

[0034] In a preferred embodiment, a longitudinally arranged pre-tightening groove 521 is opened on the rod wall of the lower thread 52 , and the push nut 4 is connected to the screw rod 5 by reinforcing the connection between the push nut 4 and the screw rod 5 through the pre-tightening groove 521 .

[0035] In a preferred embodiment, the number of the connecting rod retractable arms 23 is at least two groups and they are evenly arranged around the screw rod 5. The connecting rod retractable arms 23 can be three groups or four groups, and different numbers can be set according to needs.

[0036] In a preferred embodiment, the connecting rod protruding end 233 is a connecting rod 2332 hinged to the upper connecting rod 231 and the lower connecting rod 232 at one end, and connected to the mounting block 24 at the other end, that is, the connecting rod protruding end 233 is a rod at this time.

[0037] In a preferred embodiment, the connecting rod extension end 233 includes a hinge rod 2331 and a connecting rod 2332; one end of the hinge rod 2331 is hinged to the upper connecting rod 231, and the other end is hinged to the lower connecting rod 232; the connecting rod 2332 is respectively arranged at the hinge end of the hinge rod 2331 and is hinged to the hinge rod 2331. This embodiment is provided for configuring two mounting blocks 24 for one connecting rod retractable arm 23.

[0038] In a preferred embodiment, the length of the upper connecting rod 231 is longer than that of the lower connecting rod 232. In this case, the upper connecting rod 231 can better retract and gather the lower connecting rod 232 inward.

[0039] In a preferred embodiment, the mounting block 24 is provided with a mounting hole for mounting a workpiece.

[0040] In a preferred embodiment, the guide rod 1 is hollow inside.

[0041] A curing agent stirring system includes the above-mentioned expansion and contraction moving device, and also includes a stirring container 6, which is a container for holding the slurry to be stirred; a stirring component 7, wherein the stirring component 7 is used to stir the mixed slurry in the stirring container 6; a conveying component 8, wherein the conveying component 8 includes a conveying pipe 81 for conveying the curing agent to the stirring container 6, and the conveying pipe 81 is installed on the mounting block 24.

[0042] In a preferred embodiment, the stirring assembly 7 includes a stirring paddle 71, a rotating rod 72, a power supply motor 73, and a rotating motor; a rotating motor is provided in the rotating rod 72, and the rotating motor is connected to the power supply motor 73 through the inner cavity of the guide rod 1; the rotating rod 72 drives the stirring paddle 71 to rotate; the stirring paddle 71 is used to stir and mix the slurry in the stirring container 6.

[0043] In a preferred embodiment, the stirring paddle 71 includes at least two rectangular plates that are not parallel to each other.

[0044] In a preferred embodiment, the stirring paddle 71 is a lantern-shaped wire mesh.

[0045] In a preferred embodiment, the delivery assembly 8 further includes a curing agent metering pump 82 and a guide tube 83 connecting the delivery pipe 81 and the curing agent metering pump 82 .

[0046] In a preferred embodiment, at least two guide tubes 83 are provided, the number of the delivery tubes 81 matches the number of the guide rods 1 , and the number of the connecting rod retracting arms 23 matches the number of the delivery tubes 81 .

[0047] In a preferred embodiment, the system further comprises a waste collection box 9 having a maximum diameter smaller than that of the stirring container 6, the waste collection box 9 being mounted on the rotating rod 72 and arranged directly above the stirring container 6, and the waste collection box 9 being used to collect waste discharged when the transmission tube retracts inward; when the connecting rod retracting arm 23 expands outward, the mounting block 24 drives the transmission tube 81 to move from directly above the waste collection box 9 to directly above the stirring container 6. The waste collection box 9 is used to evacuate the air in the guide tube 83 in advance before adding the curing agent so that the entire system is filled with the curing agent, and at the same time, to receive the excess curing agent that may fall after the curing agent is added, or to receive the excess curing agent in the curing agent metering pump 82.

[0048] In a preferred embodiment, the waste collection box 9 is cylindrical.

[0049] The working steps of the curing agent stirring system are as follows: when the connecting rod retractable arm 23 is not expanded, that is, when the connecting rod retractable arm 23 is retracted, the waste integrated box 9 directly below the conveying pipe 81 discharges a part of the curing agent in the pipe, and the curing agent that has not been in contact with the air in the pipe for a long time is discharged, and then the push nut 4 is rotated downward, and the lower connecting rod 232 gradually approaches the horizontal so that the entire connecting rod retractable arm 23 pushes the conveying pipe 81 installed on the mounting block 24 to gradually move away from the screw rod 5, that is, from directly above the waste integrated box 9 to directly above the stirring container 6, and then adjusts the push nut 4 to a certain position, or repeatedly adjusts the push nut 4 according to the stirring situation so that the conveying pipe 81 evenly conveys the curing agent to the stirring container 6, and at the same time, turns on the power supply motor 73 to allow the stirring paddle 71 to simultaneously stir the curing agent and other slurries in the stirring container 6 to merge.

[0050] The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments can be combined with each other to form new embodiments. The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any modification or equivalent replacement that does not deviate from the spirit and scope of the present invention should be included in the scope of the technical solutions of the present invention.

Claims

1. An expansion and contraction moving device, characterized in that: include: A screw rod (5) and a guide rod (1), wherein the screw rod (5) is sleeved on the guide rod (1) and can slide on the guide rod (1); A connecting rod assembly (2), the connecting rod assembly (2) comprising an upper support (21) and a lower support (22) mounted on the screw rod (5), a connecting rod retracting arm (23), a connecting rod retracting arm (23) connecting the upper support (21) and the lower support (22), and a mounting block (24) connected to the connecting rod retracting arm (23) and used for mounting a workpiece to be moved; The two ends of the screw rod (5) are threadedly connected to a fixing nut (3) and a pushing nut (4); the upper support (21) and the lower support (22) are respectively in contact with the fixing nut (3) and the pushing nut (4); the upper end of the screw rod (5) is provided with an upper thread (51) adapted to the fixing nut (3), and the lower end of the screw rod (5) is provided with a lower thread (52) adapted to the pushing nut (4); the middle part of the screw rod (5) is a smooth rod wall for the sliding of the lower support (22); a longitudinally arranged fixing groove (511) is provided on the rod wall of the upper thread (51), and the fixing nut (3) is reinforced by the fixing groove (511) for mounting the screw rod (5) and the guide rod (1); The connecting rod retractable arm (23) expands as the distance between the upper support (21) and the lower support (22) approaches, and contracts as the distance between the upper support (21) and the lower support (22) increases.

2. The expansion and contraction moving device according to claim 1, characterized in that: The connecting rod retractable arm (23) comprises an upper connecting rod (231) hinged to the upper support (21), a lower connecting rod (232) hinged to the lower support (22), and a connecting rod extending end (233) hinged to the upper connecting rod (231) and the lower connecting rod (232), respectively.

3. The expansion and contraction moving device according to claim 1, characterized in that: The connecting rod retractable arms (23) are at least two in number and are evenly arranged around the screw rod (5).

4. The expansion and contraction moving device according to claim 2, characterized in that: The connecting rod protruding end (233) comprises a connecting rod (2332) having one end hinged to the upper connecting rod (231) and the lower connecting rod (232), and the other end of the connecting rod (2332) is connected to the mounting block (24); the mounting block (24) is provided with a mounting hole for mounting a workpiece to be moved.

5. The expansion and contraction moving device according to claim 2, characterized in that: The connecting rod protruding end (233) comprises a hinged rod (2331) and a connecting rod (2332); one end of the hinged rod (2331) is hinged to the upper connecting rod (231), and the other end is hinged to the lower connecting rod (232); the connecting rod (2332) is respectively arranged at the hinged end of the hinged rod (2331) and is hinged to the hinged rod (2331).

6. The expansion and contraction moving device according to claim 2, characterized in that: The length of the upper connecting rod (231) is longer than that of the lower connecting rod (232).

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