CN216896606U - Bearing capacity adjustable support frame - Google Patents

Abstract

The utility model provides a supporting frame with adjustable bearing capacity. The pulley, the elastic module and the mandrel of the support frame are arranged on the vertical column. The bearing plate bears the display. The variable-speed wheel is sleeved on the mandrel component and comprises a plurality of circular ring sections. The ring segments have different effective radii from one another. The shifting rod piece is connected with the variable speed wheel and is used for adjusting the relative position of the variable speed wheel on the mandrel piece. The first rope body is connected with the pulley and the mandrel piece and can be wound on the mandrel piece. The second rope is connected with the elastic module and the mandrel piece and can be wound on the variable speed wheel. When external force is applied to the pulley, the pulley moves relative to the vertical column, the first rope drives the mandrel component to pivot, and the variable speed wheel rotates along with the mandrel component to wind the second rope on one of the circular ring segments. When the external force is removed, the display is stopped at any position relative to the upright post.

Description

Support frame with adjustable bearing capacity

technical field

The utility model relates to a support frame, in particular to a support frame with adjustable bearing capacity.

Background technique

Existing supports with adjustable bearing capacity, such as the display lifting device disclosed in utility model patent TWM469418U, usually pre-set multiple constant force springs, and then decide which constant force springs to use according to the weight of the display. However, in some cases, such as the weight of the monitor being carried is relatively light, not all the fixed force springs will be used, and at least one fixed force spring must be idle, which increases the cost and takes up extra space. In view of this, there is a need in the art for a support frame that can adjust the bearing capacity and can fully use the set force spring.

Utility model content

The purpose of the present utility model is to provide a support frame with adjustable bearing capacity, which can support a variety of displays with different weights by arranging variable speed wheels with ring segments with different radii and multiple sets of constant force springs. The user can adjust the ring segment currently used by the shifting wheel according to the weight of the display, so as to change the bearing capacity of the support frame.

In order to achieve the above purpose, the present invention discloses a support frame with adjustable bearing capacity, which is used for bearing one of a plurality of displays. The support frame includes an upright column, a pulley, a bearing plate, an elastic module, a mandrel, a shifting wheel, a lever, a first rope body and a second rope body. The pulley is slidably disposed on the upright column substantially parallel to a gravity direction. The carrying plate is connected with the trolley for carrying one of the displays. The elastic module is arranged on the upright column. The mandrel member extends along an axis and is pivotally disposed on the upright post. The shifting wheel is sleeved on the mandrel and includes a plurality of ring segments connected in sequence along the axis. The annular ring segments each have an effective radius that differs from each other. The lever member is connected with the shifting wheel. When the pulley is at a highest position, the shift lever can be shifted to adjust the relative position of the shift wheel on the mandrel. The first rope body is connected to the pulley and the mandrel, and can be wound on the mandrel. The second rope body is connected to the elastic module and the mandrel, and can be wound around the shifting wheel. When one of the displays is installed on the carrying plate, and an external force is applied to the trolley, the trolley moves from the highest position relative to the upright column between the highest position and a lowest position, the first rope drives the trolley The mandrel member is pivoted, and the speed change wheel rotates with the mandrel member to wind the second rope body around one of the ring segments. When the external force is removed, one of the displays will stop at an arbitrary position between the highest position and the lowest position relative to the upright column.

The mandrel includes a shaft, and a cross section of the shaft perpendicular to the axis is non-circular. The shifting wheel also includes a through hole for the shaft to pass through. The through hole is non-circular and is connected to the shaft. The cross-section of the gear is matched, whereby the speed change wheel can slide relative to the shaft rod, and the shaft rod and the speed change wheel can rotate synchronously with the axis as the shaft center.

The shifting wheel further includes a groove extending parallel to the axis, and the second rope body is connected to the mandrel member via the groove, when the pulley is at the highest position and the shifting wheel is on the mandrel member along the axis When sliding, the speed change wheel and the second rope body do not interfere with each other. When the pulley moves from the highest position to the lowest position relative to the upright column, the second rope body is wound around the speed change wheel and interferes with the speed change wheel. The shifting wheel is prevented from sliding along the axis relative to the mandrel member.

When the pulley is at the highest position, the proportion of the first rope body wound around the mandrel is the largest, and the proportion of the second rope body wrapped around the shifting wheel is the smallest; when the pulley is at the lowest position, the The proportion of the first rope body wound around the mandrel is the smallest, and the proportion of the second rope body wound around the speed change wheel is the largest.

The shifting wheel further includes an engaging section, the lever member has an accommodating slot seat and an operating lever connected to each other, the engaging section is embedded in the accommodating slot seat, and the operating rod partially protrudes from the accommodating slot seat. Outside the upright column, when the trolley is at the highest position, by controlling the operating lever, the shifting wheel can be driven to move on the shaft rod, so that one of the ring segments is arranged corresponding to the second rope body.

The upright column has a through slot extending parallel to the axis, the operating rod can slide through the through slot, and protrudes from the upright column from the through slot.

The effective radii of the ring segments are arranged in ascending order along the axis.

The speed change wheel further includes a stop segment, the stop segment is opposite to the engaging segment, and the groove is located between the stop segment and the engaging segment, and runs through and communicates with the ring segment.

The mandrel also includes a first bearing end and a second bearing end opposite to each other, which are respectively pivotally arranged on the upright column, and the shaft is connected to the first bearing end and the second bearing between the ends.

The shaft has a winding section for winding the first rope body, and the winding section is located between the first bearing end and the engaging section.

The upright column also includes a slide rail module for the trolley to be set.

In other embodiments, the support frame further includes a steering wheel disposed on the upright column, and the second rope body is connected between the elastic module and the mandrel through the steering wheel. By adjusting the lever member to change the relative position of the shifting wheel on the mandrel member, one of the plurality of ring segments is aligned with the steering wheel perpendicular to the axis. When the pulley moves from the highest position to the lowest position relative to the upright column, the second rope body is gradually wound around one of the ring segments aligned with the steering wheel.

The elastic module includes a base, at least a certain force spring and a connecting plate, the base is fixed on the upright column, the connecting plate is slidably parallel to a gravitational direction on the upright column, and the constant force spring includes a connecting plate connected to the upright column. A winding portion and an end portion of the winding portion are arranged in the base body, and the end portion is connected to the connecting plate.

The second rope body has an opposite first end and a second end, the first end is connected to the mandrel, and the second end is connected to the connecting plate.

The connecting plate has a first locking member and a plate body, the first locking member is connected to the end of the constant force spring and the plate body, and is connected to the second end of the second rope body, the The mandrel also includes a second locking member, which penetrates through the shaft and is connected to the first end of the second rope body.

The elastic module also includes a friction block, which is connected with the connecting plate and is in contact with the upright post.

After referring to the accompanying drawings and the embodiments described later, those skilled in the art can understand other objects of the present invention, as well as the means and implementation status of the present invention.

Description of drawings

Fig. 1 is the schematic diagram of the support frame with adjustable bearing capacity of the present invention;

Fig. 2 is the exploded view of the support frame with adjustable bearing capacity of the present invention;

Fig. 3 is the perspective view of the support frame with adjustable bearing capacity of the present invention;

Fig. 4 is the schematic diagram of the elastic force module of the utility model;

Fig. 5 is the exploded view of the elastic module of the utility model;

Fig. 6 is the partial schematic diagram of the mandrel piece and the upright column of the present invention;

Fig. 7 is the perspective view of the speed change wheel of the utility model;

8 is a schematic diagram of the combination of the speed change wheel and the mandrel part of the present invention;

Fig. 9 is the top view of the support frame with adjustable bearing capacity of the present invention;

Fig. 10 is the schematic diagram of the mandrel part, the shifting wheel and the lever part of the present invention;

11 is a partial schematic view of the supporting frame with adjustable bearing capacity of the present invention;

12 is a partial schematic diagram of the support frame with adjustable bearing capacity of the present invention;

Figure 13 is a side view of the utility model pulley at the highest position;

Figure 14 is a side view of the utility model pulley at the lowest position;

15 is a partial schematic view of the support frame with adjustable bearing capacity of the present invention;

Fig. 16 is a partial schematic view of the support frame with adjustable bearing capacity of the present invention.

[Description of reference numerals]

1000, 2000, 3000: Display

1: Support frame

11: Upright Post

111: Grooving

112: Slide rail module

113: Arc notch

12: Pulley

121: Connection block

1211: Rope body fixings

122: Motherboard

123: Side panels

124: Flap

13: Carrier plate

14: Elastic Module

141: Seat

142: constant force spring

1421: Winding Section

1422: End

143: Connection board

1431: First Locker

1432: Board Body

144: Friction block

15: Mandrel pieces

151: Shaft

1511: Winding Section

152: The first bearing end

153: Second bearing end

154: Second lock

16: Shift wheel

161: Torus segment

162: Perforation

163: Groove

164: Engagement segment

165: Stop segment

17: lever parts

171: accommodating slot seat

172: Joystick

18: The first rope body

19: Second rope body

191: First End

192: Second End

10: steering wheel

R1, R2, R3, R4: effective radius

H1: highest position

H2: lowest position

G: direction of gravity

L: axis

Detailed ways

The content of the present invention will be explained by the following examples, which are not intended to limit the implementation of the present invention in any specific environment, application or special manner as described in the embodiments. Therefore, the description of the embodiments is only for the purpose of illustrating the present invention, rather than limiting the present invention. It should be noted that in the following embodiments and the accompanying drawings, some components not directly related to the present invention have been omitted and not shown, and the dimensional relationship between the components in the accompanying drawings is only for easy understanding, not for limiting the actual scale .

Please refer to Figure 1 to Figure 3. FIG. 1 is a schematic diagram of a support frame 1 with adjustable bearing capacity of the present invention. FIG. 2 is an exploded view of the support frame 1 with adjustable bearing capacity of the present invention. FIG. 3 is a perspective view of the support frame 1 with adjustable bearing capacity of the present invention. The support frame 1 includes a vertical column 11, a pulley 12, a bearing plate 13, an elastic module 14, a mandrel member 15, a shifting wheel 16, a lever member 17, a first rope body 18, a second rope body 19 and a steering wheel 10. The support frame 1 with adjustable bearing capacity is used to carry one of the plurality of displays 1000 , 2000 and 3000 , and the specifications (weight or size) of the displays 1000 , 2000 and 3000 are different from each other.

The upright column 11 includes a structural plate 110 (for the convenience of description, the other front plates and casings are omitted), a through slot 111 and a slide rail module 112 . A through slot 111 is formed on the structural plate 110 to extend parallel to an axis L, and is used for the setting of the lever member 17 . The slide rail module 112 includes two three-section slide rails 1121 disposed opposite to each other on the structural plate 110 and extending parallel to a gravitational direction G. The axis L is substantially perpendicular to the gravitational direction G.

The pulley 12 is arranged on the upright column 11, and can move between a highest position H1 and a lowest position H2 relative to the direction of gravity G and stop with it, including a connecting block 121 (refer to FIG. 9), a main plate 122, two side plates 123 and Two wing plates 124 , the side plates 123 are respectively connected to two sides of the main board 122 and extend angularly in the same direction, and the wing plates 124 correspond to the side plates 123 respectively and extend angularly opposite. Specifically, the side plates 123 are respectively fixed to the three-section slide rails 1121 , so that the pulley 12 can slide substantially parallel to the direction G of gravity. The carrier plate 13 is fixedly connected to the wing plate 124 of the trolley 12 and used to carry one of the displays 1000, 2000 and 3000, but the carrier plate 13 and the trolley 12 can also be pivoted through hinges, thereby generating The ability to adjust the viewing angle or position.

Please refer to Figure 4 and Figure 5. FIG. 4 is a schematic diagram of an elastic force module of the present invention. FIG. 5 is an exploded view of the elastic module of the present invention. The elastic module 14 is disposed in the upright column 11 and includes a base 141 , three constant force springs 142 , a connecting plate 143 and two friction blocks 144 . The base body 141 is roughly a cuboid cover and is fixed on the upright column 11 . Each constant force spring 142 includes a connected winding portion 1421 and an end portion 1422 . The winding portion 1421 is disposed in the seat body 141 (covered by the seat body 141 from above), and the end portion 1422 faces outward from the side of the seat body 141 . It is extended and fixed upward to the connecting plate 143 . Wherein, the number and specifications of the constant force springs 142 can be changed according to requirements, but there is at least one spring to provide the supporting force required to carry one of the displays 1000 , 2000 and 3000 .

The connecting plate 143 is slidably disposed on the inner side of the upright column 11 substantially parallel to the gravity direction G, and has a first locking member 1431 and a plate body 1432 . The plate body 1432 is a U-shaped plate and can slide up and down in the upright column 11 . The end portion 1422 of one of the constant force springs 142 (eg, the middle constant force spring 142 ) is connected to the plate body 1432 through the first locking member 1431 . In other words, the first locking member 1431 is connected to the end portion 1422 of the constant force spring 142 and the plate body 1432 . In addition, the first locking member 1431 is also used for connecting the second rope body 19 . The other two constant force springs 142 are fixed to the plate body 1432 by other fasteners such as screws (not shown in the figure), and are not connected to the second rope body 19 . Thereby, when the connecting plate 143 slides upward on the inner side of the upright column 11, it will drive the constant force spring 142 to stretch or retract, so that when the displays 1000, 2000, and 3000 move up and down in the direction of gravity, the constant force spring 142 can continue to provide Support force and won't get stuck.

The friction block 144 is disposed between the connecting plate 143 and the upright column 11, and is respectively fixed on both sides of the connecting plate 143, and is in contact with the upright column 11. When the connecting plate 143 slides up and down, the friction block 144 and the fixed force spring 142, so that one of the displays 1000, 2000 and 3000 can be stopped at any time. The friction block 144 can be a slider or a slider group, and its material is selected from polyoxymethylene or selected from the group consisting of polyaryl ether ketone, polyethylene and modified polyethylene.

Please refer to Figure 2 and Figure 6. FIG. 6 is a partial schematic view of the mandrel 15 and the upright post 11 of the present invention. The mandrel 15 extends along the axis L and is rotatably disposed on the upright column 11 , and includes a shaft 151 , a first bearing end 152 , a second bearing end 153 and a second locking member 154 . The shaft rod 151 is connected between the first bearing end 152 and the second bearing end 153 , and a section of the shaft rod 151 perpendicular to the axis L is non-circular. The top ends of the two sides of the upright column 11 are respectively provided with arc-shaped notches 113, and a section of the first bearing end 152 and a section of the second bearing end 153 are designed to match the shape of the arc-shaped notches 113 of the upright column 11 (for example, round), so that the shaft rod 151 can pivot relative to the upright column 11 through the first bearing end 152 and the second bearing end 153 . The second locking member 154 is passed through the shaft rod 151 and is connected to the second rope body 19 . Further, the first bearing end 152 and the second bearing end 153 respectively have the shape of a stepped cylinder.

Please refer to Figure 7 and Figure 8. FIG. 7 is a perspective view of the speed change wheel 16 of the present invention. FIG. 8 is a schematic view of the combination of the speed change wheel 16 and the mandrel 15 of the present invention. The shifting wheel 16 is sleeved on the mandrel member 15 and includes a plurality of ring segments 161 , a through hole 162 , a groove 163 , an engaging segment 164 and a stop segment 165 . As shown in FIG. 9 , the annular segments 161 are connected in sequence along the axis L, and the annular segments 161 have different effective radii R1 , R2 , R3 , and R4 relative to the shaft rod 151 . In this embodiment, the speed change wheel 16 is roughly a gyro, and the effective radii R1, R2, R3, R4 of each ring segment 161 are arranged in order from small to large along the axis L, for example, 5mm, 8mm, 11mm, 14mm, but not limited to this.

As shown in FIG. 7 to FIG. 9 , the through hole 162 is non-circular and matches the cross section of the shaft rod 151 for the shaft rod 151 to pass through, whereby the shifting wheel 16 can slide relative to the shaft rod 151 (reciprocating along the axis L). sliding), and the shaft rod 151 and the transmission wheel 16 can rotate synchronously with the axis L as the axis. The engaging segment 164 is disc-shaped and is connected to the ring segment 161 with the largest effective radius (ie R4 ), and is embedded in the lever member 17 . The stopper segment 165 is also disc-shaped and is opposite to the engaging segment 164, and is connected to the ring segment 161 with the smallest effective radius (ie, R1). The groove 163 extends parallel to the axis L, is located between the stopper segment 165 and the engaging segment 164 , and penetrates through and communicates with the annular segment 161 .

Please refer to Figure 10 to Figure 15. The lever member 17 is connected with the shifting wheel 16 , and has an accommodating slot 171 and an operating lever 172 which are connected with each other. When the pulley 12 is at the highest position H1, the lever member 17 can be toggled to adjust the relative position of the shifting wheel 16 on the shaft 151 of the mandrel member 15 (ie, substantially adjust the position along the axis L). Specifically, the engaging section 164 of the shifting wheel 16 is embedded in the accommodating slot seat 171 , and the operating rod 172 is slidably inserted through the through slot 111 and partially protrudes out of the upright post 11 . When the pulley 12 is located at the highest position H1, through the control lever 172, the shifting wheel 16 can be driven to move on the shaft rod 151 to change the relative position of the shifting wheel 16 on the mandrel 15, so that the ring segment 161 is One of them is arranged corresponding to the second rope body 19 and is aligned with the steering wheel 10 perpendicular to the axis L. As shown in FIG. When the pulley 12 is not at the highest position H1, the relative position of the shifting wheel 16 on the shaft rod 151 cannot be adjusted by toggling the lever member 17, and the relevant details will be described later.

One end of the first rope body 18 is connected to the pulley 12 , and the other end is connected to the mandrel 15 . Specifically, the pulley 12 has a connecting block 121 . The connecting block 121 is provided with at least one rope fixing member 1211 for fixing one end of the first rope 18 . The shaft 151 of the mandrel 15 has a winding section 1511 located between the first bearing end 152 and the engaging section 164 , and the other end of the first rope body 18 is wound and connected to the winding section 1511 . In this embodiment, the material of the first rope body 18 is Kevlar synthetic fiber, but it is not limited thereto.

Please refer to FIGS. 11 and 15 , the second rope body 19 is connected to the elastic module 14 , is connected to the mandrel 15 through the groove 163 , and is connected between the elastic module 14 and the mandrel 15 through the steering wheel 10 ; 12 At the highest position H1, the speed change wheel 16 and the second rope body 19 do not interfere with each other, so the relative position of the speed change wheel 16 on the shaft 151 can be adjusted. When the pulley 12 moves from the highest position H1 to the lowest position H2, it can be It is gradually wound on the speed change wheel 16 , since the speed change wheel 16 interferes with the second rope body 19 at this time, the relative position of the speed change wheel 16 can no longer be adjusted by the lever member 17 . Specifically, the steering wheel 10 is disposed in the upright column 11 , the second rope body 19 has a first end 191 and a second end 192 opposite to each other, and the first end 191 passes through the groove 163 and is wound around the mandrel 15 , and is connected to the second locking member 154 fixed on the mandrel member 15 , and the second end 192 passes through the first locking member 1431 connected to the connecting plate 143 between the steering wheel 10 and the upright column 11 , and passes through the steering wheel 10 The part abuts against the position of the middle section of the steering wheel 10 . In this embodiment, the material of the second rope body 19 is also Kevlar synthetic fiber, but it is not limited to this.

In this embodiment, the steering wheel 10 is a roller with a small diameter section (not numbered in the figure) in the center, for the second rope body 19 to pass through to be turned, and prevent improper movement.

Next, the corresponding changes of the speed change wheel 16 , the first rope body 18 and the second rope body 19 during the movement of the pulley 12 from the highest position H1 to the lowest position H2 are further described. 11 , 12 and 13 , when the pulley 12 is at the highest position H1 , the proportion of the first rope body 18 wound around the mandrel 15 is the largest, and the proportion of the second rope body 19 wound around the speed change wheel 16 is the smallest. , the speed change wheel 16 and the second rope body 19 do not interfere with each other, the speed change wheel 16 slides along the axis L on the mandrel member 15 and is adjusted so that the ring segment 161 with the smallest effective radius R1 is aligned with the steering wheel 10 .

If one of the displays 1000 , 2000 and 3000 (eg, the display 1000 shown in FIG. 1 ) is placed on the carrier plate 13 , and an external force is applied to the trolley 12 , the trolley 12 will be at the highest position relative to the upright column 11 from the highest position H1 Moving between the position H1 and the lowest position H2, the pulley 12 will pull the first rope body 18 and drive the mandrel member 15 to pivot, and the speed change wheel 16 rotates with the mandrel member 15 to gradually wind the second rope body 19 to a position with a minimum effective value. On the ring segment 161 of the radius R1, due to interference at this time, the speed change wheel 16 can no longer slide relative to the spindle member 15 along the axis L to adjust the relative position. When the external force is removed, due to the action of the constant force spring 142 and the friction block 144, one of the displays 1000 relative to the upright post 11 stops at any position between the highest position H1 and the lowest position H2.

When the pulley 12 moves to the lowest position H2 (as shown in FIG. 14 ), the ratio of the first rope body 18 wound around the mandrel 15 is the smallest, and the ratio of the second rope body 19 wound around the speed change wheel 16 is the largest.

Please refer to FIG. 16 again, the pulley 12 is at the highest position H1 at this time, and the ring segment 161 with the minimum effective radius R3 is aligned with the steering wheel 10 through the lever member 17. When an external force is applied, the pulley 12 is moved from the highest position H1 to the lowest. Moving between positions H2, the second rope body 19 will gradually be wound on the ring segment 161 with the smallest effective radius R3. Since the effective radius R3 (11mm) is 2.2 times the effective radius R1 (5mm), the constant force spring 142 and the friction block 144 provide the same total force, so the difference in torque (effective radius multiplied by the total force) is also 2.2 times. Similarly, the ring segment 161 of the effective radius R2 and the ring segment of the effective radius R4 are also different by 2.2 times. 161 can also generate different torques, so that they can correspond to monitors of different specifications (weight or size).

To sum up, in the support frame of the present invention, the shifting wheels with ring segments of different radii are movably arranged on the mandrel member, and the pulley and the mandrel member are connected by a rope body, and by another The rope body passes through the steering wheel to connect the speed change wheel and the constant force spring. When the pulley is at the highest position, the position of the shifting wheel on the mandrel can be adjusted, so that any ring segment is aligned with the steering wheel, so as to adjust the bearing capacity to match the monitors of different specifications. When the pulley moves from the highest position to the lowest position, the second rope body is gradually wound around the ring segment aligned with the steering wheel, so that the shifting wheel cannot slide on the mandrel. If the shifting wheel is adjusted to use a ring segment with a smaller radius, the weight of the display that can be carried by the support frame is also lighter. Conversely, when the gear wheel is adjusted to use a ring segment with a larger radius, the weight of the display that can be carried by the support frame is also heavier. Accordingly, the support frame of the present invention can carry a variety of monitors with different weights, and allows the user to adjust the ring segment currently used by the shifting wheel according to the weight of the monitor to change the bearing capacity of the support frame.

The above-mentioned embodiments are only used to illustrate the implementation state of the present invention and to explain the technical features of the present invention, and are not used to limit the protection scope of the present invention. Any changes or equality arrangements that can be easily accomplished by those skilled in the art fall within the claimed scope of the present utility model, and the scope of protection of the present utility model shall be subject to the claims.

Claims (12)

1. A support frame with adjustable bearing capacity for carrying one of a plurality of displays, wherein the support frame comprises: stand upright a pulley, slidably disposed on the upright column substantially parallel to a gravity direction; a carrying plate connected to the trolley for carrying one of the displays; an elastic module, arranged on the upright column; a mandrel, extending along an axis and pivotably disposed on the upright post; a speed change wheel, sleeved on the mandrel, and comprising a plurality of ring segments connected in sequence along the axis, the ring segments each having an effective radius different from each other; a lever member connected to the shifting wheel, when the pulley is at a highest position, the lever member can be toggled to adjust the relative position of the shifting wheel on the mandrel; A first rope body is connected to the pulley and the mandrel, and can be wound on the mandrel; and A second rope body is connected to the elastic module and the mandrel, and can be wound around the shifting wheel; Wherein, when one of the displays is disposed on the carrying plate, and an external force is applied to the pulley, so that the pulley moves from the highest position relative to the upright column between the highest position and a lowest position, the first rope body Drive the mandrel to pivot, the speed change wheel rotates with the mandrel to wind the second rope around one of the ring segments, when the external force is removed, one of the displays Relative to the upright column, it stops at an arbitrary position between the highest position and the lowest position. 2 . The support frame of claim 1 , wherein the mandrel member comprises a shaft, and a cross section of the shaft perpendicular to the axis is non-circular, and the speed change wheel further comprises a through hole for the shaft. 3 . The rod is passed through, the perforation is non-circular and matches the cross section of the shaft rod, whereby the speed change wheel can slide relative to the shaft rod, and the shaft rod and the speed change wheel can rotate synchronously with the axis as the axis . 3 . The support frame according to claim 2 , wherein the shifting wheel further comprises a groove extending parallel to the axis, the second rope body is connected to the mandrel through the groove, and when the pulley is located at The highest position and the shifting wheel slides along the axis on the mandrel, the shifting wheel and the second rope body do not interfere with each other, when the pulley moves from the highest position relative to the upright column to the lowest position, the first The two rope bodies are wound around the speed change wheel and interfere with the speed change wheel, so that the speed change wheel cannot slide relative to the mandrel member along the axis. 4 . The support frame according to claim 3 , wherein when the pulley is at the highest position, the ratio of the first rope body wound around the mandrel is the largest, and the second rope body is wound around the mandrel member. 5 . The ratio of the speed change wheel is the smallest; when the pulley is at the lowest position, the ratio of the first rope body wound on the mandrel is the smallest, and the ratio of the second rope body wound around the speed change wheel is the largest. 5 . The support frame according to claim 4 , wherein the shifting wheel further comprises an engaging section, the lever member has an accommodating slot seat and an operating lever that are connected to each other, and the engaging section is embedded in the In the accommodating slot seat, the operating rod partially protrudes out of the upright column. When the pulley is at the highest position, by controlling the operating rod, the shifting wheel can be driven to move on the shaft rod, so that the One of the ring segments is arranged corresponding to the second rope body. 6 . The support frame according to claim 5 , wherein the upright column has a through slot extending parallel to the axis, the operating rod is slidably inserted through the through slot, and protrudes from the through slot. 7 . outside the upright column. 7 . The support frame according to claim 6 , wherein the effective radii of the ring segments are arranged in order from small to large along the axis. 8 . 8 . The support frame of claim 7 , wherein the shifting wheel further comprises a stop section, the stop section is opposite to the engaging section, and the groove is located at the stop section and the engaging section. 9 . between the segments, and through and communicate with the annular segment. 9 . The support frame according to claim 8 , wherein the mandrel member further comprises a first bearing end and a second bearing end opposite to each other, which are respectively pivotably arranged on the upright column, 10 . The upright column also includes a slide rail module for the trolley to be installed, and the shaft is connected between the first bearing end and the second bearing end, and has a winding section for the first rope body winding, the winding segment is located between the first bearing end and the engaging segment. 10. The support frame according to any one of claims 2 to 9, further comprising a steering wheel disposed on the upright column, and the second rope body is connected to the elastic module via the steering wheel and between the mandrel member, by adjusting the lever member to change the relative position of the shifting wheel on the mandrel member, so that one of the plurality of ring segments is aligned with the steering wheel perpendicular to the axis, When the pulley moves from the highest position to the lowest position relative to the upright column, the second rope body is gradually wound around one of the ring segments aligned with the steering wheel. 11 . The support frame of claim 10 , wherein the elastic module comprises a seat, at least a certain force spring and a connecting plate, the seat is fixed on the upright column, and the connecting plate is substantially parallel to a gravity force 11 . The direction is slidable on the upright column, the constant force spring includes a connected winding portion and an end portion, the winding portion is arranged in the seat body, and the end portion is connected to the connecting plate. 12 . The support frame of claim 11 , wherein the second rope body has a first end and a second end opposite to each other, the first end is connected to the mandrel, and the second end is connected to the mandrel. 13 . The connecting plate has a first locking member and a plate body, the first locking member is connected to the end of the constant force spring and the plate body, and is used for the second rope body of the second rope body. end connection, the mandrel also includes a second locking member, which penetrates through the shaft and is connected to the first end of the second rope body, and the elastic module further includes a friction block, which is connected to the connecting plate , and in contact with the upright post.

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