Lifting table and hand-cranking device thereof

Abstract

The utility model provides a lifting table and a hand-cranking device thereof, the hand-cranking device is fixed on the lifting table, the lifting table is provided with a lifting device, the hand-cranking device is matched with the lifting device, the hand-cranking device comprises a transmission rod, the transmission rod is in transmission connection with the lifting device, and the transmission rod can rotate around the axis of the transmission rod so as to drive the lifting table to ascend and descend; the transmission pipe is telescopically connected with the transmission rod; the fixed sleeve is arranged on the lifting table; the locking sleeve is fixed on the transmission pipe, and the locking sleeve is matched with the fixing sleeve to limit the rotation of the transmission rod, so that the lifting table can be self-locked when being adjusted to a proper height, the lifting table is prevented from suddenly sliding down to cause danger, and the use safety of the lifting table is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to a lifting table and a hand-cranking device thereof. Background Art

[0002] Nowadays, as people spend more and more time sitting at work, people gradually realize that sitting for a long time is not conducive to improving work efficiency. People began to try alternating between sitting and standing at work, and gradually, lift tables appeared. Standing work using lift tables has become a popular and healthy way of working.

[0003] However, in actual use, there is a problem: once the torsion spring assembly inside the column of the lifting table fails or the torque value decreases, the entire table may slide down, which poses a certain safety risk. Therefore, it is necessary to provide a lifting table with a self-locking structure to avoid the danger of sudden sliding of the lifting table. Utility Model Content

[0004] Therefore, the utility model provides a lifting table and a hand-cranked device thereof, which solve the problem of the lifting table suddenly sliding down and causing danger.

[0005] In order to solve the above problems, the utility model provides a lifting table and a hand-cranked device thereof, the hand-cranked device is fixed on the lifting table, the lifting table is provided with a lifting device, the hand-cranked device and the lifting device cooperate with each other, and the hand-cranked device comprises: a transmission rod, the transmission rod is transmission-connected to the lifting device, the transmission rod can rotate around its own axis, thereby driving the lifting table to rise and fall; a transmission tube, the transmission tube is telescopically connected to the transmission rod; a fixing sleeve, the fixing sleeve is arranged on the lifting table; a locking sleeve is fixed on the transmission tube, and the locking sleeve and the fixing sleeve cooperate with each other to limit the rotation of the transmission rod.

[0006] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the hand-cranked device is provided with a transmission rod, and the transmission rod cooperates with the lifting device to form a transmission connection, so that the user can operate the hand-cranked device, thereby allowing the lifting device to drive the lifting table to rise and fall. The fixed sleeve is arranged on the lifting table, and the locking sleeve is fixed on the transmission tube. The locking sleeve and the fixed sleeve cooperate with each other to limit the rotation of the transmission rod, so that the lifting table can be self-locked when adjusted to a suitable height, preventing the lifting table from suddenly sliding down and causing danger, thereby increasing the safety of the lifting table. The transmission rod and the transmission tube are telescopically connected. When the transmission rod extends out of the transmission tube, it is convenient for the user to adjust the height of the lifting table. When the transmission rod is retracted into the transmission tube, the space occupied by the hand-cranked device is reduced to prevent the user from colliding, making the lifting table safer when in use.

[0007] Furthermore, the fixing sleeve includes: a protruding piece, a limiting rib, and the limiting rib is arranged on the outer circumferential side of the protruding piece; wherein the locking sleeve is provided with a sleeve piece and a locking rib, and the locking rib is arranged inside the sleeve piece, and when the sleeve piece surrounds the protruding piece, the locking rib and the limiting rib cooperate with each other.

[0008] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the fixed sleeve is provided with a protruding piece and a limiting rib, the limiting rib is provided on the outer circumference of the protruding piece, the locking sleeve is provided with a sleeve piece and a locking rib, the sleeve piece can be sleeved on the protruding piece, so that the locking rib provided inside the sleeve piece can abut against the limiting rib, limiting the rotation of the transmission rod along its own axis, thereby making the hand-cranked device self-locking and preventing the lifting table from suddenly sliding down.

[0009] Furthermore, the fixing sleeve also includes: a fixing piece, which is fixedly connected to the sleeve piece; wherein the lifting table includes a bracket, and the fixing piece is fixed on the bracket.

[0010] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the fixed sleeve is provided with a fixing piece, the fixing piece is fixedly connected to the sleeve piece, the lifting table is provided with a bracket, the fixing piece is fixed on the bracket, the contact area between the fixed sleeve and the bracket is increased, and the stability of the fixed sleeve is increased.

[0011] Furthermore, the fixing member includes: a fixing through hole, wherein the bracket is provided with a threaded hole, and the fixing through hole and the threaded hole cooperate with each other so that the screw passes through the fixing through hole and meshes with the thread in the threaded hole.

[0012] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the fixing piece is fixed to the bracket by screws, the fixing piece is provided with a fixing through hole, the bracket is provided with a threaded hole, the fixing through hole and the threaded hole cooperate with each other, the screw passes through the fixing through hole and engages with the thread in the threaded hole, thereby fixing the fixing piece to the bracket, the fixing piece and the bracket are connected by screws, the connection method is simpler, and at the same time, the screws are cheap and easy to obtain, which reduces the cost of production and manufacturing.

[0013] Furthermore, the fixing sleeve also includes: a rotating member, which is arranged between the transmission rod and the protruding member.

[0014] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the fixed sleeve is also provided with a rotating part, which is arranged between the protruding part and the transmission rod. When the transmission rod rotates around its own axis, the friction between the transmission rod and the fixed sleeve can be reduced, thereby preventing the transmission rod and the fixed sleeve from being worn. At the same time, the noise generated by the user when operating the hand-cranked device is reduced, thereby improving the user experience.

[0015] Furthermore, the transmission rod comprises: a stop wall, the stop wall and the rotating member abut against each other to limit the movement of the rotating member along the axis of the transmission rod.

[0016] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the transmission rod is provided with a stop wall, and one end of the rotating part abuts against the stop wall, thereby limiting the movement of the rotating part along the axis of the transmission rod, increasing the reliability of the rotating part fixed on the transmission rod, and making the user more stable when adjusting the height of the lifting table by operating the hand crank device.

[0017] Furthermore, the transmission rod also includes: a limit member, the limit member sleeve is arranged on the transmission rod, and the limit member and the fixed sleeve abut against each other; wherein, the transmission rod is provided with a mounting groove, and the limit member is arranged in the mounting groove.

[0018] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the limit piece sleeve is arranged on the transmission rod, and the transmission rod is provided with an installation groove for installing the limit piece. On the one hand, it can prevent the limit piece from being offset. On the other hand, when assembling the lifting table, it is convenient for the assemblers to determine the installation position of the limit piece, thereby improving the assembly efficiency. The limit piece and the fixed sleeve abut against each other, and the limit piece is arranged close to the bracket so that the limit piece can limit the movement of the fixed sleeve in the direction of the bracket, thereby increasing the stability of the fixed sleeve.

[0019] Furthermore, the limiting member is provided with a limiting notch, and the limiting member is fixed on the transmission rod through the limiting notch.

[0020] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the limiting member is provided with a limiting notch, which makes it more convenient to install the limiting member and saves the time for assembling the hand-cranked device.

[0021] Furthermore, the hand crank device also includes: a hand crank handle, which is fixedly connected to the transmission tube.

[0022] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the hand crank device is provided with a hand crank handle, which is fixedly connected to the transmission tube. When the user adjusts the height of the lifting table, the user can shake the hand crank handle, which is convenient for the user to operate.

[0023] Furthermore, the utility model also provides a lifting table, which includes a hand-cranked device.

[0024] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the lifting table is provided with a hand-cranked device, through which the height of the lifting table can be adjusted, making it more convenient for users to use and improving the actual user experience.

[0025] After adopting the technical solution of the utility model, the following technical effects can be achieved:

[0026] (1) The hand crank device is provided with a transmission rod, which is connected to the lifting device, so that the user can operate the hand crank device, so that the lifting device drives the lifting table to move up and down. The fixed sleeve is arranged on the lifting table, and the locking sleeve is fixed on the transmission tube. The locking sleeve and the fixed sleeve cooperate with each other to limit the rotation of the transmission rod, so that the lifting table can self-lock when adjusted to a suitable height, preventing the lifting table from suddenly sliding down and causing danger, thereby increasing the safety of the lifting table;

[0027] (2) The fixed sleeve is provided with a protruding piece and a limiting rib, the limiting rib is provided on the outer peripheral side of the protruding piece, and the locking sleeve is provided with a sleeve piece and a locking rib, the sleeve piece can be sleeved on the protruding piece, so that the locking rib provided inside the sleeve piece can abut against the limiting rib, limiting the rotation of the transmission rod along its own axis, thereby making the hand-cranked device self-locking, preventing the lifting table from sliding down suddenly;

[0028] (3) The fixed sleeve is provided with a fixing piece, which is fixedly connected to the sleeve piece. The lifting table is provided with a bracket, and the fixing piece is fixed on the bracket to prevent the transmission rod from driving the fixed sleeve to rotate during the rotation process. At the same time, the fixed sleeve is provided with a fixing piece, which increases the contact area between the fixed sleeve and the bracket and increases the stability of the fixed sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the partial structure of a lifting table provided in an embodiment of the utility model.

[0030] Figure 2 It is a structural schematic diagram of the hand-cranked device.

[0031] Figure 3 for Figure 2 Magnified view of area A in the middle.

[0032] Figure 4 It is a first structural schematic diagram of the transmission rod.

[0033] Figure 5 for Figure 4 Magnified view of area B in the middle.

[0034] Figure 6 Schematic diagram of the second structure of the transmission rod.

[0035] Figure 7 for Figure 6 Magnified view of area C in the middle.

[0036] Figure 8 It is a structural schematic diagram of the fixed sleeve.

[0037] Fig. 9 It is a schematic diagram of the structure of the locking sleeve.

[0038] Fig.10 A first structural schematic diagram of the bracket.

[0039] Fig.11 for Fig.10 Magnified view of area D in the middle.

[0040] Fig.12 It is a schematic diagram of the structure of the limiter.

[0041] Fig.13 It is a structural schematic diagram of the connection between the transmission rod and the transmission tube.

[0042] Fig.14 for Fig.13 Cross-sectional view along the EE direction.

[0043] Description of reference numerals:

[0044] 100: hand crank device; 110: transmission rod; 111: stop wall; 112: limit member; 112a: limit notch; 113: mounting groove; 120: fixing sleeve; 121: protruding member; 122: limiting rib; 123: fixing member; 123a: fixing through hole; 124: rotating member; 130: locking sleeve; 131: sleeve member; 132: locking rib; 140: transmission tube; 150: hand crank handle; 210: lifting device; 220: bracket; 220a: threaded hole. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] The utility model provides a hand crank device 100, which is fixed on a lifting table. The lifting table is provided with a lifting device 210. The hand crank device 100 and the lifting device 210 cooperate with each other. The hand crank device 100 includes: a transmission rod 110, which is transmission-connected with the lifting device 210, and the transmission rod 110 can rotate around its own axis, thereby driving the lifting table to rise and fall; a transmission tube 140 is telescopically connected to the transmission rod 110; a fixing sleeve 120 is provided on the lifting table; a locking sleeve 130 is fixed on the transmission tube 140, and the locking sleeve 130 cooperates with the fixing sleeve 120 to limit the rotation of the transmission rod 110.

[0047] For example, as shown in the attached Figure 1 As shown, the present invention provides a hand-cranked device 100, which is fixed on a lifting table. Fig.11As shown, the lifting table includes a lifting device 220, and the lifting device 210 cooperates with the hand-cranked device 100. When the height of the lifting table needs to be adjusted, the user adjusts the height of the lifting table through the hand-cranked device 100. The hand-cranked device 100 includes: a transmission rod 110, a fixing sleeve 120 and a locking sleeve 130. The locking sleeve 130 cooperates with the fixing sleeve 120 to limit the transmission rod 110 from rotating around its own axis, so that the lifting table is self-locking.

[0048] Specifically, as attached Fig.13 and attached Fig.14 As shown, Fig.14 Yes Fig.13 In the cross-sectional view along the EE direction, the transmission rod 110 is telescopically connected to the transmission tube 140 , so that the transmission rod 110 can be extended or retracted relative to the transmission tube 140 .

[0049] Preferably, the transmission rod 110 extends into the interior of the lifting device 210, and the transmission rod 110 is connected to the lifting device 210. When the user shakes the hand crank 100, the transmission rod 110 rotates around its own axis, driving the lifting device 210 to move, thereby adjusting the height of the lifting table.

[0050] For example, the fixing sleeve 120 includes: a protruding piece 121; a limiting rib 122, which is arranged on the outer circumferential side of the protruding piece 121; wherein the locking sleeve 130 is provided with a sleeve piece 131 and a locking rib 132, which is arranged inside the sleeve piece 131, and when the sleeve piece 131 surrounds the protruding piece 121, the locking rib 132 cooperates with the limiting rib 122.

[0051] For example, as shown in the attached Figure 8 As shown, the fixing sleeve 120 is provided with a protruding piece 121 and a limiting rib 122, and the limiting rib 122 is provided on the outer peripheral side of the protruding piece 121; Fig. 9 As shown, the locking sleeve 130 is provided with a sleeve member 131 and a locking rib 132. The sleeve member 131 can be sleeved on the protruding member 121 so that the limiting rib 122 and the locking rib 132 abut against each other, thereby limiting the rotation of the transmission rod 110 around its own axis, so that the hand-cranked device 100 is self-locking, preventing the lifting table from suddenly sliding down and avoiding danger.

[0052] Preferably, a plurality of limiting ribs 122 are provided, and the limiting ribs 122 are evenly arranged on the outer circumference of the protruding piece 121 , and a plurality of locking ribs 132 are provided, and the locking ribs 132 are evenly arranged inside the sleeve piece 131 .

[0053] For example, the fixing sleeve 120 further includes: a fixing member 123 , and the fixing member 123 is fixedly connected to the protruding member 121 ; wherein the lifting table includes a bracket 220 , and the fixing member 123 is fixed on the bracket 220 .

[0054] For example, as shown in the attached Figure 8 As shown, the fixing sleeve 120 includes a fixing member 123, and the fixing member 123 is fixedly connected to the protruding member 121. Figure 1 As shown, the fixing member 123 is fixed on the bracket 220 , which increases the contact area between the fixing sleeve 120 and the bracket 220 and increases the stability of the fixing sleeve 120 .

[0055] Preferably, as attached Fig.10 As shown, the lifting table includes a bracket 220, and the bracket 220 is provided with two brackets. Fig.11 As shown, the lifting device 210 is disposed between two brackets 220 .

[0056] Specifically, the fixing member 123 includes: a fixing through hole 123a, wherein the bracket 220 is provided with a threaded hole 220a, and the fixing through hole 123a and the threaded hole 220a cooperate with each other so that the screw passes through the fixing through hole 123a and meshes with the thread in the threaded hole 220a.

[0057] As attached Figure 8 As shown, the fixing member 123 is provided with a fixing through hole 123a. Fig.11 As shown, the bracket 220 is provided with a threaded hole 220a, and the fixing through hole 123a cooperates with the threaded hole 220a. The screw passes through the fixing through hole 123a and engages with the thread in the threaded hole 220a, thereby fixing the fixing member 123 on the bracket 220. The fixing member 123 and the bracket 220 are connected by screws, and the connection method is simpler. At the same time, screws are cheap and easy to obtain, which reduces the cost of production.

[0058] Preferably, the fixing member 123 is provided with two fixing through holes 123a, and the bracket 220 is provided with two threaded holes 220a, so that the fixing member 123 is subjected to force more evenly, and the number of the fixing through holes 123a and the threaded holes 220a are consistent.

[0059] For example, the fixing sleeve 120 further includes a rotating member 124 , and the rotating member 124 is disposed between the transmission rod 110 and the protruding member 121 .

[0060] For example, as shown in the attached Figure 3 As shown, the fixed sleeve 120 also includes a rotating member 124, which is arranged between the transmission rod 110 and the protruding member 121. When the transmission rod 110 rotates around its own axis, the friction between the transmission rod 110 and the fixed sleeve 120 can be reduced to prevent the transmission rod 110 and the fixed sleeve 120 from being worn. At the same time, the noise generated by the user when operating the hand-cranked device 100 is reduced, thereby improving the user experience.

[0061] Specifically, the transmission rod 110 includes a stop wall 111 , and the stop wall 111 and the rotating member 124 abut against each other to limit the rotating member 124 from moving along the axis of the transmission rod 110 .

[0062] Specifically, Figure 7 For attachment Figure 6 The enlarged view of area C is shown in the attached figure. Figure 7 As shown, the transmission rod 110 is provided with a stop wall 111 , and the stop wall 111 and the rotating member 124 abut against each other to limit the movement of the rotating member along the axial direction of the transmission rod 110 , thereby increasing the reliability of fixing the rotating member 124 on the transmission rod 110 .

[0063] For example, the transmission rod 110 also includes: a limit member 112, which is sleeved on the transmission rod 110, and the limit member 112 and the fixing sleeve 120 abut against each other; wherein the transmission rod 110 is provided with a mounting groove 113, and the limit member 112 is disposed in the mounting groove 113.

[0064] For example, as shown in the attached Figure 3 As shown, a limiting member 112 is provided on the transmission rod 110, and the limiting member 112 and the fixing sleeve 120 abut against each other. Figure 5 For attachment Figure 4 The enlarged image of area B is shown in the attached Figure 5 As shown, the transmission rod 110 is provided with a mounting groove 113, and the limit member 112 is arranged in the mounting groove 113. On the one hand, it can prevent the limit member 112 from being offset. On the other hand, when assembling the lifting table, it is convenient for the assemblers to determine the installation position of the limit member 112, thereby improving the efficiency of assembly. The limit member 112 and the fixing sleeve 120 abut against each other, and the limit member 112 is arranged close to the bracket 220, so that the limit member 112 can limit the fixing sleeve 120 from moving in the direction of the bracket 220, thereby increasing the stability of the fixing sleeve 120.

[0065] Preferably, as attached Fig.12 As shown, the limiting member 112 is provided with a limiting notch 112a, and the limiting member 112 is fixed to the transmission rod 110 through the limiting notch 112a, so that installation and disassembly are more convenient.

[0066] For example, the hand crank device 100 further includes: a hand crank handle 150 , and the hand crank handle 150 is fixedly connected to the transmission tube 140 .

[0067] For example, as shown in the attached Figure 2 As shown, the hand crank device 100 also includes a hand crank handle 150. The hand crank handle 150 and the transmission tube 140 are connected. When the user adjusts the height of the lifting table, the user can crank the hand crank handle 150 to facilitate the operation.

[0068] The embodiment of the utility model further provides a lifting table, which includes a hand-cranked device 100 .

[0069] Specifically, the lifting table is provided with a hand-cranked device 100, through which the height of the lifting table can be adjusted, making it more convenient for users to use and improving the actual user experience.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A hand-cranked device, characterized in that: The hand crank device (100) is fixed on a lifting table, the lifting table is provided with a lifting device (210), the hand crank device (100) and the lifting device (210) cooperate with each other, and the hand crank device (100) comprises: A transmission rod (110), the transmission rod (110) being in transmission connection with the lifting device (210), the transmission rod (110) being capable of rotating around its own axis, thereby driving the lifting table to move upward and downward; A transmission tube (140), wherein the transmission tube (140) is telescopically connected to the transmission rod (110); A fixing sleeve (120), wherein the fixing sleeve (120) is arranged on the lifting table; A locking sleeve (130), wherein the locking sleeve (130) is fixed on the transmission tube (140), and the locking sleeve (130) cooperates with the fixing sleeve (120) to limit the rotation of the transmission rod (110).

2. The hand crank device according to claim 1, characterized in that: The fixing sleeve (120) comprises: A protruding member (121); A limiting rib (122), wherein the limiting rib (122) is disposed on the outer peripheral side of the protruding piece (121); The locking sleeve (130) is provided with a sleeve member (131) and a locking rib (132); the locking rib (132) is arranged inside the sleeve member (131); when the sleeve member (131) surrounds the protruding member (121), the locking rib (132) cooperates with the limiting rib (122).

3. The hand crank device according to claim 2, characterized in that: The fixing sleeve (120) further comprises: A fixing member (123), wherein the fixing member (123) is fixedly connected to the protruding member (121); Wherein, the lifting table comprises a bracket (220), and the fixing member (123) is fixed on the bracket (220).

4. The hand crank device according to claim 3, characterized in that: The fixing member (123) comprises: A fixing through hole (123a); The bracket (220) is provided with a threaded hole (220a), and the fixing through hole (123a) cooperates with the threaded hole (220a) so that a screw passes through the fixing through hole (123a) and meshes with the thread in the threaded hole (220a).

5. The hand crank device according to claim 2, characterized in that: The fixing sleeve (120) further comprises: A rotating member (124), wherein the rotating member (124) is disposed between the transmission rod (110) and the protruding member (121).

6. The hand crank device according to claim 5, characterized in that: The transmission rod (110) comprises: A stop wall (111), wherein the stop wall (111) and the rotating member (124) abut against each other to limit the movement of the rotating member (124) along the axis of the transmission rod (110).

7. The hand crank device according to claim 6, characterized in that: The transmission rod (110) further comprises: a limiting member (112), wherein the limiting member (112) is sleeved on the transmission rod (110), and the limiting member (112) and the fixing sleeve (120) are in contact with each other; Wherein, the transmission rod (110) is provided with a mounting groove (113), and the limiting member (112) is arranged in the mounting groove (113).

8. The hand crank device according to claim 7, characterized in that: The limiting member (112) is provided with a limiting notch (112a), and the limiting member (112) is fixed on the transmission rod (110) via the limiting notch (112a).

9. The hand crank device according to claim 1, characterized in that: The hand-cranked device (100) further comprises: A hand crank (150), wherein the hand crank (150) is fixedly connected to the transmission tube (140).

10. A lifting table, characterized in that: The lifting table comprises a hand crank device (100) as claimed in any one of claims 1 to 8.

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