CN211747705U - A hand-cranked lift table stand and table - Google Patents

Abstract

The utility model discloses a hand-cranked table stand and a table, which belong to the technical field of tables. The hand-cranked table stand in the utility model comprises a beam, mounting side plates and a lifting column arranged at both ends of the beam. The lifting column includes a transmission Mechanism, the transmission mechanism includes a screw rod, and the lifting table frame also includes a lifting adjustment mechanism that realizes the lifting of the lifting column by hand. Both ends of the screw drive connection, the hand crank assembly is provided with a first self-locking torsion spring, and the screw is provided with a second self-locking torsion spring, the height and speed are highly controllable, and the safety is high, especially for safety awareness Poor minors and elderly people with slower reaction speed have stronger applicability, triple self-locking, good locking effect, high firmness, non-human large external force is difficult to destroy self-locking, and the lifting column can be stabilized in normal use. At a given height, it has high stability and strong practicability.

Description

A hand-cranked lift table stand and table

【Technical field】

The utility model relates to the technical field of tables, in particular to a hand-cranked lift table frame and a table.

【Background technique】

A table is a kind of common furniture on which items can be placed, eaten, written or worked. In order to meet the needs of the public, there are various types of tables, such as desks, dining tables, desks, computer desks, etc. Traditional desks are fixed horizontally. , it cannot be adjusted according to the user's personal situation and needs. When studying and working on this kind of desk, you need to bow your head and bend over. Using it for a long time will easily cause diseases such as the spine and lower back, and also cause myopia, etc. For these situations , There are various height-adjustable lifting tables on the market. The height change of the lifting table is generally realized by adjusting the legs of the table. At present, the most common way is to use the lifting column as the table leg. The way to drive the lifting column includes electric drive and manual drive. Hand-crank drive is a commonly used manual drive method for lifting desks. Compared with electric drive, hand-crank drive is energy-saving and environmentally friendly, with lower cost, easier to control the height and speed of the lifting table, and can be stopped at any time in the process of encountering conditions, with high safety, but The self-locking performance of the hand-cranking table currently used is poor. After rising to a suitable height, the weight of the table itself and the items it contains will put pressure on the column during use, causing the column to compress downward, and it is difficult to keep it in a suitable position. Bad sex.

[Content of the invention]

The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art, and to design a hand-cranked lift table frame with strong self-locking ability and high stability.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A hand-operated lifting table frame, comprising a beam, mounting side plates and lifting columns arranged at both ends of the beam, the lifting column includes a transmission mechanism, the transmission mechanism includes a screw rod, and the lifting table frame also includes a manual lifting mechanism. A lifting adjustment mechanism that realizes the lifting of the lifting column. The lifting adjustment mechanism includes a hand crank assembly and a connecting rod that is drive-connected to the hand crank assembly. The assembly is provided with a first self-locking torsion spring, and the screw rod is provided with a second self-locking torsion spring.

Preferably, the hand crank assembly is geared and connected to the connecting rod.

Preferably, the hand crank assembly includes a hand crank body, the hand crank body includes a handle portion, a plug and a connecting handle connecting the handle portion and the plug, the plug is provided with a first gear, the A second gear which is vertically meshed with the first gear is sleeved on the connecting rod.

Preferably, the transmission connection between the hand crank assembly and the connecting rod is further provided with a first installation shell fixed on the beam, the first gear and the second gear are arranged in the first installation shell, the first A bearing is provided between the gear and the first mounting shell, the inner ring of the bearing is in clearance fit with the first gear, the outer ring of the bearing is in interference fit with the first mounting shell, and the second gear and the first mounting shell are in an interference fit. A bearing is arranged therebetween, the inner ring of the bearing is in clearance fit with the second gear, and the outer ring of the bearing is in interference fit with the first mounting shell.

Preferably, the plug is covered with a first sleeve, the first self-locking torsion spring is sleeved outside the first sleeve, and one end of the first self-locking torsion spring is provided with a small hook, the first installation The shell is provided with a card slot for holding the small hook.

Preferably, the hand crank assembly further includes a mounting block fixed on the bottom side of the desktop, the mounting block is provided with a through hole for the plug to pass through, and the plug can be rotated in the through hole.

Preferably, the connecting rod meshes with the screw gear.

Preferably, the end of the connecting rod is provided with a third gear, and the top end of the screw rod is provided with a fourth gear that is vertically meshed with the third gear.

Preferably, the transmission connection between the connecting rod and the screw rod is further provided with a second mounting shell fixed on the lifting column, the third gear and the fourth gear are provided in the second mounting shell, and the third gear is provided in the second mounting shell. There is a bearing between the second mounting shell and the inner ring of the bearing, the inner ring of the bearing is in clearance fit with the third gear, the outer ring of the bearing is in interference fit with the second mounting shell, and between the fourth gear and the second mounting shell A bearing is provided, the inner ring of the bearing is in clearance fit with the fourth gear, and the outer ring of the bearing is in interference fit with the second mounting shell.

The beneficial effects of using the utility model:

1. When lifting and lowering the table frame in this scheme, shake the hand crank assembly, so that the rotation of the hand crank assembly drives the connecting rod to rotate, and the screw in the lifting column is driven to rotate through the connecting rod, and then the lifting column is completed. The height and speed of the lifting column are highly controllable and safe, especially for minors with poor safety awareness and the elderly with slow reaction speed. The specific composition of the lifting column in this scheme is stronger. And the working principle has been published in other patents of the patentee, you can refer to the patent document with the application number of 201720389490.8 and the title of a retractable transmission assembly device and a lifting column, but not limited to the column in this document. , and will not be repeated here.

2. When the lifting column rises, the rotation direction of the hand crank assembly is opposite to the rotation direction of the first self-locking torsion spring. During the rotation of the hand crank assembly, the first self-locking torsion spring is in a natural state and will not touch the opponent. The rotation of the handle assembly is hindered. When the lifting column is raised to the appropriate position, during the use of the lifting table, the table top and the items on it will put pressure on the lifting column, causing it to have a downward trend. The hand crank assembly has a reverse trend. The rotation direction is the same as the rotation direction of the first self-locking torsion spring. The friction between the hand crank assembly and the inner ring of the first self-locking torsion spring makes the first self-locking torsion spring follow the first self-locking torsion spring. Rotate to the direction, and the torsion spring becomes tighter and tighter, so as to hold the hand crank assembly tightly and realize the self-locking of the hand crank assembly; the principle of self-locking of the screw rod through the second self-locking torsion spring and the self-locking principle of the hand crank assembly Similar, and will not be repeated here, through the first self-locking torsion spring on the hand crank assembly and the second self-locking torsion spring on the two ends of the screw, triple self-locking, good locking effect and high firmness, Non-human large external force is difficult to destroy the self-locking, and the lifting column can be stabilized at a predetermined height during normal use, with high stability and strong practicability.

Another technical scheme of the present utility model is as follows:

A hand-cranked lifting table includes a table top, and the hand-cranked lifting table frame described in any of the above technical solutions is arranged under the table top.

These features and advantages of the utility model will be disclosed in detail in the following specific embodiments and accompanying drawings.

【Description of drawings】

The utility model is further described below in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of the three-dimensional structure of the hand-cranked table frame of the present invention.

2 is a schematic diagram of the three-dimensional structure of the utility model after removing the sleeve from the side column of the hand-cranking table frame and exposing the screw rod.

FIG. 3 is a front view of FIG. 2 after removing the second installation shell.

FIG. 4 is an enlarged view of part A in FIG. 3 .

Figure 5 is a partial enlarged view of the hand crank assembly of the present utility model and the connecting rod gear meshing transmission connection part.

6 is a schematic diagram of the three-dimensional structure of the hand crank assembly of the present invention.

FIG. 7 is a schematic three-dimensional structure diagram of the self-locking torsion spring of the present invention.

【Detailed ways】

The technical solutions of the embodiments of the utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the utility model, but the following embodiments are only the preferred embodiments of the utility model, not all. Based on the examples in the implementation manner, other examples obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

In the following description, terms such as "inner", "outer", "upper", "lower", "left", "right", etc. appear to indicate orientation or positional relationship, which are only for the convenience of describing the embodiments and simplifying the description, Rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, it should not be construed as a limitation on the utility model.

Example 1:

As shown in Figures 1 to 7, a hand-cranked table frame includes a beam 001, a side plate 005, and a lifting column 002 arranged at both ends of the beam 001. The bottom end of the lifting column is provided with feet 003, and the feet 003 pass through the feet. 003 The entire table frame is firmly placed on the ground, the lifting column 002 includes a transmission mechanism, the transmission mechanism includes a screw 3, and the lifting table frame also includes a lifting adjustment that realizes the lifting of the lifting column 002 by hand. Mechanism 004, the lift adjustment mechanism 004 includes a hand crank assembly 1 and a connecting rod 2 that is drive-connected to the hand crank assembly 1, the connecting rod 2 is also drive-connected to both ends of the screw rods 3, the hand crank assembly 1 is provided with a first self-locking torsion spring 4 , and the screw rod 3 is provided with a second self-locking torsion spring 5 .

When lifting and lowering the table frame in this embodiment, shake the hand crank assembly 1, so that the rotation of the hand crank assembly 1 drives the connecting rod 2 to rotate, and the screw rod 3 in the lifting column 002 is driven by the connecting rod 2 to rotate. , and then complete the lifting of the lifting column 002, the height and speed of the column lifting are highly controllable, and the safety is high, especially for minors with poor safety awareness and the elderly with slow reaction speed. The specific structure and working principle of the lifting column 002 in the example have been published in other patents of the present patentee, and will not be repeated here. When the lifting column 002 rises, the rotation direction of the hand crank assembly 1 is opposite to that of the first self-locking torsion spring 4. During the rotation of the hand crank assembly 1, the first self-locking torsion spring 4 is in a natural state, It will not hinder the rotation of the hand crank assembly 1. When the lifting column 002 is raised to a suitable position, during the use of the lifting table, the desktop and the objects on it will put pressure on the lifting column 002, causing it to have a downward trend. 1. There is a reversal trend. The direction of reversal is the same as the rotation direction of the first self-locking torsion spring 4. The friction force between the hand crank assembly 1 and the inner ring of the first self-locking torsion spring 4 makes the first self-locking torsion spring 4 crank the handle. The assembly 1 rotates along the rotation direction of the first self-locking torsion spring 4, and the torsion spring becomes tighter and tighter, so as to hold the hand crank assembly 1 tightly and realize the self-locking of the hand crank assembly 1; The self-locking principle of the locking torsion spring 5 is similar to the self-locking principle of the hand crank assembly 1, and will not be repeated here. The second self-locking torsion spring 5, triple self-locking, has good locking effect and high firmness, and it is difficult to destroy the self-locking by non-human large external force. During normal use, the lifting column 002 can be stabilized at a given height, with high stability and practicality. Strong sex.

The rotation direction of the hand crank assembly 1 is different from the rotation center of the connecting rod 2. When the components are in transmission, they also need to change the direction, as shown in Figure 5. Therefore, in this embodiment, the hand crank assembly 1 and the The connecting rod 2 is geared and connected for transmission. As shown in FIG. 6 , the crank handle assembly 1 includes a crank handle body 101, and the crank handle body 101 includes a handle portion 101a, a plug 101b, and a connection between the handle portion 101a and the plug 101b. The handle 101c, the hand crank body 101 and the connecting rod 2 are engaged with gears. The specific structure is that the plug 101b is provided with a first gear 102. As shown in FIG. 5, the connecting rod 2 is sleeved with a second gear that meshes vertically with the first gear 102 201. The above gear meshing method has a compact structure, occupies a small space, reduces the volume of the entire connection structure, has high transmission efficiency, accurate transmission ratio and long service life, and does not need to be disassembled, maintained and replaced frequently. If the handle body 101 is far from the connecting rod 2 and the length of the plug is not enough, the plug 101b can be connected to the transmission shaft through a coupling, and the first gear 102 can be arranged on the transmission shaft.

The cross rod in this embodiment can be a retractable push rod. When extended, if the length of the connecting rod 2 is not enough to connect with the two ends of the screw rods 3, the other connecting rod can also be connected through a coupling. rod.

In order to facilitate the fixing of the gear transmission connection, as shown in FIG. 2 , the transmission connection between the hand crank assembly 1 and the connecting rod 2 is also provided with a first installation shell 6 fixed on the beam 001 , the first gear 102 and the second The gear 201 is arranged in the first mounting shell 6. As shown in FIG. 5, a bearing 7 is provided between the first gear 102 and the first mounting shell 6. The inner ring of the bearing 7 is in clearance fit with the first gear 102, and the outer bearing 7 The ring has an interference fit with the first mounting shell 6, a bearing 7 is provided between the second gear 201 and the first mounting shell 6, the inner ring of the bearing 7 is a clearance fit with the second gear 201, and the outer ring of the bearing 7 is in a clearance fit with the first mounting shell 6. Interference fit. By setting the bearing 7, the first gear 102 and the second gear 201 can be rotated more smoothly, avoiding the direct friction between the first gear 102 and the second gear 201 and the first mounting shell 6, slowing down wear and reducing replacement. cost and prolong service life.

In order to avoid direct friction between the plug 101b and the first self-locking torsion spring 4 and damage to the plug 101b and the first self-locking torsion spring 4, as shown in FIG. 5 and FIG. The locking torsion spring 4 is sleeved outside the first shaft sleeve 103, the inner ring of the first shaft sleeve 103 matches the shape of the plug 101b, and the rotation is consistent, and there is no relative rotation. If the plug 101b is a hexagonal plug 101b, the first shaft The cross-section of the inner ring of the sleeve 103 is also hexagonal. As shown in FIG. 7 , a small hook 401 is provided on one end of the first self-locking torsion spring 4, and a slot for holding the small hook 401 is provided in the first installation shell 6. Therefore, it is ensured that one end of the first self-locking torsion spring 4 is the fixed end, and the other end is the free end, so that when the plug 101b is reversed, the free end rotates together with the first shaft sleeve 103 due to friction, and the more and more the direction of rotation is. The tighter the screw, the more self-locking is achieved.

As shown in FIG. 6 , the hand crank assembly 1 further includes a mounting block 104 fixed on the bottom side of the desktop. The mounting block 104 is provided with a through hole for the plug 101b to pass through. The plug 101b can be rotated in the through hole, and the first installation The shell 6 fixes one end of the hand crank assembly 1 on the beam 001, and the setting of the installation block 104 also limits the other end of the hand crank assembly 1 to a position below the desktop, so that the hand crank assembly 1 can only be Rotating around the central axis, it will not shake up and down, left and right, making the hand cranking smoother and feeling better, improving the stability and accuracy of the transmission of the hand crank assembly 1, thereby improving the stability of the entire hand cranking table frame. sex.

In this embodiment, the rotation center of the connecting rod 2 is also different from the rotation center of the screw rod 3. During the transmission between the two components, the direction also needs to be changed, as shown in FIG. 4, so the connecting rod 2 and the screw rod 3 There is also a gear meshing transmission connection between them. The specific structure of the gear meshing is that the end of the connecting rod 2 is provided with a third gear 202, and the top of the screw rod 3 is provided with a fourth gear 301 that is vertically meshed with the third gear 202. In order to facilitate the gear meshing transmission For the fixing of the connecting part, as shown in Figure 2, the transmission connection between the connecting rod 2 and the screw rod 3 is also provided with a second mounting shell 8 fixed on the lifting column 002, and the third gear 202 and the fourth gear 301 are provided on the first In the second mounting shell 8, a bearing 7 is provided between the third gear 202 and the second mounting shell 8. The inner ring of the bearing 7 is in clearance fit with the third gear 202, and the outer ring of the bearing 7 is in an interference fit with the second mounting shell 8. A bearing 7 is provided between the fourth gear 301 and the second mounting shell 8. The inner ring of the bearing 7 is in clearance fit with the fourth gear 301, and the outer ring of the bearing 7 is in an interference fit with the second mounting shell 8. By arranging the bearing 7, the The third gear 202 and the fourth gear 301 rotate more smoothly, avoiding direct friction between the third gear 202 and the fourth gear 301 and the second mounting shell 8 , slowing down wear, reducing replacement cost and prolonging service life.

Embodiment 2:

A hand-cranked lifting table includes a table top, and the hand-cranked lifting table frame described in the technical solution of the first embodiment is arranged under the table top.

The above are only specific embodiments of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the accompanying drawings and the descriptions in the above specific embodiments. content. Any modifications that do not depart from the functional and structural principles of the utility model are intended to be included in the scope of the claims.

Claims (10)

1. A hand-operated lifting table frame, comprising a beam, a side plate and a lifting column arranged at both ends of the beam, the lifting column includes a transmission mechanism, and the transmission mechanism includes a screw rod, characterized in that the lifting table The frame also includes a lifting adjustment mechanism that realizes the lifting of the lifting column by hand cranking. The lifting adjustment mechanism includes a hand crank assembly and a connecting rod that is drivingly connected to the hand crank assembly, and the connecting rod is drivingly connected to both ends of the screw. , the hand crank assembly is provided with a first self-locking torsion spring, and the screw rod is provided with a second self-locking torsion spring. 2 . The hand-cranked desk stand according to claim 1 , wherein the hand-cranked handle assembly is connected with the connecting rod gear in meshing transmission. 3 . 3 . The hand-cranked desk stand according to claim 2 , wherein the hand-cranked handle assembly comprises a hand-cranked handle body, and the hand-cranked handle body includes a handle portion, a plug, and a connection between the handle portion and the plug. 4 . The connecting handle is provided with a first gear on the plug, and a second gear which is vertically meshed with the first gear is sleeved on the connecting rod. 4 . The hand-cranked table stand according to claim 3 , wherein the transmission connection between the hand-crank handle assembly and the connecting rod is further provided with a first installation shell fixed on the beam, and the first gear and the second gear are arranged in the first mounting shell, a bearing is arranged between the first gear and the first mounting shell, the inner ring of the bearing is in clearance fit with the first gear, and the outer ring of the bearing is mounted with the first The shell is in interference fit, a bearing is arranged between the second gear and the first mounting shell, the inner ring of the bearing is in clearance fit with the second gear, and the outer ring of the bearing is in interference fit with the first mounting shell. 5 . The hand-cranked table stand according to claim 4 , wherein a first shaft sleeve is sleeved on the plug, the first self-locking torsion spring is sleeved outside the first sleeve, and the first sleeve is sleeved. 6 . A small hook is arranged on one end of a self-locking torsion spring, and a slot for clamping the small hook is arranged in the first installation shell. 6. The hand-cranked table stand according to any one of claims 3 to 5, wherein the hand-cranked handle assembly further comprises a mounting block fixed on the bottom side of the desktop, and the mounting block is provided with a A through hole through which the plug passes, the plug being swivelable in the through hole. 7 . The hand-cranked table stand according to claim 1 , wherein the connecting rod is engaged with a screw gear. 8 . 8 . The hand-cranked table stand according to claim 7 , wherein a third gear is arranged at the end of the connecting rod, and a fourth gear is arranged at the top of the screw rod which is vertically meshed with the third gear. 9 . 9 . The hand-cranked table stand according to claim 8 , wherein the transmission connection between the connecting rod and the screw rod is further provided with a second installation shell fixed on the lifting column, and the third gear and the The fourth gear is arranged in the second mounting shell, a bearing is arranged between the third gear and the second mounting shell, the inner ring of the bearing is in clearance fit with the third gear, and the outer ring of the bearing is in the second mounting shell For interference fit, a bearing is provided between the fourth gear and the second mounting shell, the inner ring of the bearing is in clearance fit with the fourth gear, and the outer ring of the bearing is in interference fit with the second mounting shell. 10 . A hand-cranked elevating table, comprising a table top, wherein a hand-crank elevating table frame according to any one of claims 1 to 9 is arranged under the table top. 11 .

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