A clamping device for the sprocket box of a micro-tiller

Abstract

The present invention relates to the technical field of mechanical clamping tools, and discloses a clamping device for a sprocket box of a micro-tiller, including a workbench. A main positioning member, a secondary positioning member and a pressure plate are installed on the upper surface of the workbench. A longitudinal sliding cavity is formed inside the main positioning member. A longitudinal contact member is installed in the longitudinal sliding cavity. A longitudinal elastic member is installed between the longitudinal contact member and the longitudinal sliding cavity. An inclined surface is formed on the left side of the main positioning member. A hydraulic mechanism is installed on the inclined surface. A longitudinal steel rope is hinged to one side of the hydraulic mechanism. A transverse sliding cavity is formed inside the main positioning member. A transverse contact member is installed in the transverse sliding cavity. A transverse elastic member is jointly installed between the transverse contact member and the transverse sliding cavity. Through the arrangement of the longitudinal contact member and the transverse contact member, the sprocket box is fixed by the positioning member and will be subjected to the fixing force applied by the above components, thereby reducing the influence of the groove surface wear on the clamping effect.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical clamping tools, and specifically to a clamping device for a sprocket box of a micro-tiller. Background Technique

[0002] A clamping tool refers to a process device used to fasten a workpiece during workpiece processing, so as to keep the machine tool, tool, and workpiece in the correct relative positions. Among them, during the hole boring operation of the sprocket box of a micro-tiller, in order to prevent it from moving, the above-mentioned clamping tool is usually used to fix it.

[0003] Before processing the sprocket box with the existing clamping tool, first, the operator needs to place the sprocket box in the groove of the positioning mechanism, making the groove surface contact and fit with the side surface of the sprocket box, thus completing the positioning of the sprocket box. Then, the hydraulic mechanism drives the pressure plate to move downward and press it tightly against the upper surface of the sprocket box. As Figure 7 shown, through the above actions, the clamping of the sprocket box is realized. However, during the long-term use of the above-mentioned clamping tool, the groove surface of the positioning mechanism is worn due to the friction of the sprocket box, resulting in the inability of the groove surface to effectively contact and fit with the side surface of the sprocket box, thereby affecting the clamping effect of the clamping tool on the sprocket box. When the sprocket box is performing the hole boring operation, it is prone to slight movement, thus affecting the hole boring accuracy and reducing the quality of the sprocket box. Summary of the Invention

[0004] Aiming at the deficiencies existing in the use of the existing clamping tool in the background technique, the present invention provides a clamping device for a sprocket box of a micro-tiller, which has the advantages of reducing the influence of groove surface wear on the clamping effect of the clamping tool and reducing the probability of the hole boring accuracy being affected, and solves the technical problems proposed in the above background technique.

[0005] The present invention provides the following technical solution: A clamping device for a sprocket box of a micro-tiller, including a workbench. A main positioning member is fixedly installed at the left position of the upper surface of the workbench. A square groove is formed on the right side surface of the main positioning member. A secondary positioning member is fixedly installed at the right position of the upper surface of the workbench. A sprocket box is jointly installed between the main positioning member and the secondary positioning member. A pressure plate is installed at the middle position of the upper surface of the workbench. Longitudinal sliding chambers are respectively formed at the upper and lower positions of the square groove inside the main positioning member. Longitudinal contact members with plates passing through the ports of the longitudinal sliding chambers are slidably installed in the longitudinal sliding chambers. A longitudinal elastic member is jointly fixed between the side surface of the piston end of the longitudinal contact member facing away from the square groove and the wall body of the longitudinal sliding chamber. Oblique surfaces are symmetrically arranged up and down at the left position of the main positioning member. A hydraulic mechanism is installed on the oblique surfaces. One side of the output rod of the hydraulic mechanism is hinged with a longitudinal steel rope. The other end of the longitudinal steel rope is fixedly connected with the piston end of the longitudinal contact member. Transverse sliding chambers are symmetrically arranged up and down at the left position of the square groove inside the main positioning member. Transverse contact members with plates passing through the ports of the transverse sliding chambers are slidably installed in the transverse sliding chambers. A transverse elastic member is jointly fixed between the side surface of the piston end of the transverse contact member facing away from the square groove and the wall body of the transverse sliding chamber. The other side of the output rod of the hydraulic mechanism is hinged with a transverse steel rope. The other end of the transverse steel rope is fixedly connected with the piston end of the transverse contact member.

[0006] Preferably, the piston end of the longitudinal contact member forms a sealed sliding connection with the longitudinal sliding chamber, the plate of the longitudinal contact member forms a sealed sliding connection with the port of the longitudinal sliding chamber, and the chamber of the longitudinal sliding chamber where the plate of the longitudinal contact member is installed is filled with a liquid medium.

[0007] Preferably, the transverse contact member is divided into an inner contact member and outer contact members arranged on the front and rear sides of the inner contact member. A sealed sliding connection is formed between the outer contact members and the inner contact member. The piston ends of the outer contact members and the inner contact member both form sealed sliding connections with the transverse sliding chamber. The plates of the outer contact members and the inner contact member both form sealed sliding connections with the ports of the transverse sliding chamber. The chamber of the transverse sliding chamber where the plates of the outer contact members and the inner contact member are installed is filled with a liquid medium. A transverse elastic member is jointly fixed between the side surface of the piston end of the inner contact member facing away from the square groove and the wall body of the transverse sliding chamber. The other end of the transverse steel rope is fixedly connected with the piston end of the inner contact member.

[0008] Preferably, a clamping groove is formed on the side surface of the outer contact member facing the inner contact member. A clamping block that forms a sealed sliding connection with the clamping groove is fixedly installed on the side surface of the inner contact member facing the clamping groove.

[0009] Preferably, a first through hole is formed through the clamping block, and the first through hole communicates with the chambers on the left and right sides of the clamping block in the clamping groove.

[0010] Preferably, a liquid guiding hole is formed inside the main positioning member at a position between adjacent longitudinal sliding cavities and transverse sliding cavities for communicating the cavity in the longitudinal sliding cavity where the longitudinal contact member plate is installed with the cavity in the transverse sliding cavity where the outer contact member and the inner contact member plate are installed. On the left side wall of the square groove, air bags are fixedly installed in a vertically symmetric manner. The air bags are close to the longitudinal sliding cavity. The air bags, the inner contact member and the inner cavity of the sprocket box are at the same horizontal height. A second through hole is formed inside the main positioning member at a position on one side of the liquid guiding hole for communicating the liquid guiding hole with the inner cavity of the air bag. A convex block structure is arranged on the left inner wall of the transverse sliding cavity at a position corresponding to the outer contact member. The lengths of the longitudinal steel rope and the transverse steel rope are the same.

[0011] Preferably, the clamping block is arranged as a complete block structure. A deflation groove is formed inside the outer contact member at a position on the left side of the clamping groove for communicating the clamping groove with the cavity in the transverse sliding cavity at a position on the left side of the transverse contact member.

[0012] Preferably, the cavity in the clamping groove at a position on the right side of the clamping block is filled with a liquid medium. Support cavities are formed inside the inner contact member in a front-back symmetric manner. Support members are hermetically and movably installed in the support cavities. A liquid infusion hole is formed inside the inner contact member at a position on the left side of the support cavity for communicating the cavity in the clamping groove at a position on the right side of the clamping block with the cavity in the support cavity at a position on the left side of the support member.

[0013] The present invention has the following beneficial effects:

[0014] 1. Through the arrangement of the longitudinal contact member and the transverse contact member in the present invention, when the sprocket box is placed in the groove, the longitudinal elastic member drives the longitudinal contact member to move outward. At the same time, the transverse elastic member drives the transverse contact member to move outward. Then, the outward moving longitudinal contact member and transverse contact member contact and squeeze the side surface of the sprocket box, so that while the sprocket box is fixed by the positioning member, it will be subjected to the fixing force applied by the above components, thereby reducing the influence of the groove surface wear on the clamping effect.

[0015] 2. Through the arrangement of the liquid guiding hole and the air bag in the present invention, during the outward movement of the longitudinal contact member and the transverse contact member, the two will squeeze the liquid medium in the longitudinal sliding cavity and the transverse sliding cavity into the air bag through the liquid guiding hole, causing the air bag to expand and extend into the cavity of the sprocket box. Then, the expanded air bag contacts the wall of the sprocket box, and further applies an outward extrusion force to the sprocket box. By combining the outward extrusion force with the downward pressure of the existing pressure plate, the clamping effect on the sprocket box is improved, and the probability of the drilling accuracy being affected is reduced.

[0016] 3. Through the arrangement of the airbag and the lateral contact member, during the outward movement of the above-mentioned lateral contact member, the inner contact member will extend into the cavity of the sprocket box, so that the airbag expanding in the inner cavity of the sprocket box will be jointly limited by the inner contact member and the wall of the sprocket box, causing the airbag to deform to a certain extent and further contacting the wall of the sprocket box, thereby further improving the clamping effect on the sprocket box and reducing the probability of the boring accuracy being affected. After that, when the boring machine bores the sprocket box, since the boring position is in the middle of the sprocket box, the inner contact member protects the airbag, preventing the tool of the boring machine from contacting the airbag and causing damage to the airbag.

[0017] 4. Through the arrangement of the clamping groove and the support member, during the process of the above-mentioned inner contact member extending into the inner cavity of the sprocket box, the liquid medium in the clamping groove will drive the support member to extend obliquely and contact the upper and lower inner walls of the sprocket box, and then the support member applies an outward extrusion force to the wheel box, thereby further improving the clamping effect on the sprocket box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the internal structure of the main positioning member in Embodiment 1 of the present invention;

[0019] Figure 2 Schematic diagram of the internal structure of the longitudinal sliding cavity and the transverse sliding cavity in Embodiment 1 of the present invention;

[0020] Figure 3 For the present invention Figure 2 Partial enlarged view of the structure at A in

[0021] Figure 4 Schematic diagram of the diversion hole in Embodiment 1 of the present invention;

[0022] Figure 5 Schematic diagram of the combined state of the outer contact member and the inner contact member in Embodiment 1 of the present invention;

[0023] Figure 6 Schematic diagram of the internal structure of the transverse sliding cavity in Embodiment 2 of the present invention;

[0024] Figure 7 Schematic diagram of the prior art.

[0025] In the figure: 1, workbench; 2, main positioning member; 3, longitudinal sliding cavity; 4, longitudinal contact member; 5, longitudinal elastic member; 6, hydraulic mechanism; 7, longitudinal steel wire rope; 8, transverse sliding cavity; 9, transverse contact member; 90, outer contact member; 91, inner contact member; 10, transverse elastic member; 11, transverse steel wire rope; 12, clamping groove; 13, clamping block; 14, liquid guiding hole; 15, airbag; 16, support cavity; 17, support member; 18, liquid infusion hole. DETAILED DESCRIPTION OF THE INVENTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] Please refer to Figure 1 With Figure 2, A clamping device for a sprocket box of a micro-tiller, comprising a workbench 1. A main positioning member 2 is welded at the left side position of the upper surface of the workbench 1. A square groove is formed on the right side surface of the main positioning member 2. A secondary positioning member is welded at the right side position of the upper surface of the workbench 1. An arc-shaped groove is formed on the left side surface of the secondary positioning member. A sprocket box is clamped jointly in the square groove and the arc-shaped groove. A pressure plate is installed at the position between the main positioning member 2 and the secondary positioning member on the upper surface of the workbench 1. The pressure plate is driven to move up and down by a power mechanism (prior art, such as a hydraulic telescopic rod). Longitudinal sliding cavities 3 are formed at the positions on both the upper and lower sides of the square groove inside the main positioning member 2. A longitudinal contact member 4 is slidably installed in the longitudinal sliding cavity 3. The plate body of the longitudinal contact member 4 passes through the port of the longitudinal sliding cavity 3. A longitudinal elastic member 5 is fixedly installed on the side surface of the piston end of the longitudinal contact member 4 facing away from the square groove. The other end of the longitudinal elastic member 5 is fixedly connected to the wall body of the longitudinal sliding cavity 3. A first opening is formed on the side of the main positioning member 2 away from the square groove inside the longitudinal sliding cavity 3. The first opening communicates the cavity in the longitudinal sliding cavity 3 at the position facing away from the plate body of the longitudinal contact member 4 with the external environment. Bevel surfaces arranged symmetrically up and down are formed at the left side position of the main positioning member 2. A hydraulic mechanism 6 (prior art, such as a combination of a hydraulic cylinder and an output rod) is installed on the bevel surface. A longitudinal steel rope 7 is hinged to one side of the output rod of the hydraulic mechanism 6. The other end of the longitudinal steel rope 7 passes through the first opening and is fixedly connected to the piston end of the longitudinal contact member 4. Transverse sliding cavities 8 are formed at the positions on both the upper and lower sides of the square groove inside the main positioning member 2 on the left side. A transverse contact member 9 is slidably installed in the transverse sliding cavity 8. The plate body of the transverse contact member 9 passes through the port of the transverse sliding cavity 8. A transverse elastic member 10 is fixedly installed on the side surface of the piston end of the transverse contact member 9 facing away from the square groove. The other end of the transverse elastic member 10 is fixedly connected to the wall body of the transverse sliding cavity 8. A second opening is formed on the side of the main positioning member 2 away from the square groove inside the transverse sliding cavity 8. The second opening communicates the cavity in the transverse sliding cavity 8 at the position facing away from the plate body of the transverse contact member 9 with the external environment. A transverse steel rope 11 is hinged to the other side of the output rod of the hydraulic mechanism 6. The other end of the transverse steel rope 11 passes through the second opening and is fixedly connected to the piston end of the transverse contact member 9. After the sprocket box is placed in the square groove and the arc-shaped groove, the hydraulic mechanism 6 is contracted, so that the longitudinal steel rope 7 and the transverse steel rope 11 are relaxed synchronously, causing the longitudinal elastic member 5 and the transverse elastic member 10 to release elastic force and driving the longitudinal contact member 4 and the transverse contact member 9 to move outwards and extend. Then, by the extended longitudinal contact member 4 and the transverse contact member 9 contacting and squeezing the side surface of the sprocket box, while the sprocket box is fixed by the main positioning member 2, it will be subjected to the fixing force applied by the above components, thereby reducing the influence of the wear of the groove surface of the main positioning member 2 on the clamping effect.

[0029] The piston end of the longitudinal contact member 4 forms a sealed sliding connection with the longitudinal sliding cavity 3 (this connection relationship is similar to the connection relationship between an oil cylinder and a piston in the prior art). The plate body of the longitudinal contact member 4 forms a sealed sliding connection with the port of the longitudinal sliding cavity 3. The cavity where the plate body of the longitudinal contact member 4 is installed in the longitudinal sliding cavity 3 is filled with a liquid medium (such as water). Through the sealed sliding arrangement between the above structures, when the longitudinal contact member 4 moves outwards, it will squeeze the liquid medium in the longitudinal sliding cavity 3, thus facilitating the realization of subsequent functions.

[0030] Please refer to Figure 2 and Figure 3 , the transverse contact member 9 is divided into two outer contact members 90 and one inner contact member 91. The two outer contact members 90 are respectively located in the front and rear positions of the inner contact member 91. A sealed sliding connection is formed between the outer contact member 90 and the inner contact member 91. The piston ends of the outer contact member 90 and the inner contact member 91 both form a sealed sliding connection with the transverse sliding cavity 8. The plate bodies of the outer contact member 90 and the inner contact member 91 both pass through the port of the transverse sliding cavity 8, and the plate bodies of the outer contact member 90 and the inner contact member 91 both form a sealed sliding connection with the port of the transverse sliding cavity 8. The cavity where the plate bodies of the outer contact member 90 and the inner contact member 91 are installed in the transverse sliding cavity 8 is filled with a liquid medium. A transverse elastic member 10 is fixedly installed on the side of the piston end of the inner contact member 91 facing away from the square groove, and the other end of the transverse elastic member 10 is fixedly connected to the wall body of the transverse sliding cavity 8. The second opening communicates the cavity in the transverse sliding cavity 8 located behind the plate bodies of the outer contact member 90 and the inner contact member 91 with the external environment. The other end of the transverse steel rope 11 is fixedly connected to the piston end of the inner contact member 91. Through the sealed sliding arrangement between the above structures, when the transverse contact member 9 moves outwards, it will squeeze the liquid medium in the transverse sliding cavity 8, thus facilitating the realization of subsequent functions.

[0031] Please refer to Figure 5 , a card slot 12 is formed on the side of the outer contact member 90 facing the inner contact member 91. A block 13 is welded on the side of the inner contact member 91 facing the card slot 12. The block 13 and the card slot 12 form a sealed sliding connection. During the process of the transverse elastic member 10 releasing its elastic force, it will drive the inner contact member 91 to move outwards, causing the block 13 to move to the right in the card slot 12. After that, when the block 13 moves to the extreme position on the right, the transverse elastic member 10 continues to apply force, thereby driving the outer contact member 90 to extend outwards and contact the side of the sprocket box. Through the setting of the block 13 and the card slot 12, it is avoided that the outer contact member 90 cannot move, resulting in the clamping effect of the sprocket box being affected.

[0032] A first through hole is horizontally penetrated inside the block 13, and the first through hole communicates the cavities on the left and right sides of the block 13 in the card slot 12. Through the setting of the first through hole, the moving resistance of the block 13 in the card slot 12 is reduced.

[0033] Please refer toFigure 4 With Figure 5 , a liquid guide hole 14 is provided inside the main positioning member 2 at a position between the adjacent longitudinal sliding cavity 3 and the transverse sliding cavity 8. One end of the liquid guide hole 14 communicates with the cavity of the plate body of the longitudinal contact member 4 installed in the longitudinal sliding cavity 3, and the other end of the liquid guide hole 14 communicates with the cavity of the plate bodies of the outer contact member 90 and the inner contact member 91 installed in the transverse sliding cavity 8. Air bags 15 arranged symmetrically up and down are fixedly installed on the left side wall of the square groove. The air bags 15 are close to the longitudinal sliding cavity 3. The air bags 15, the inner contact member 91 and the inner cavity of the sprocket box are at the same horizontal height. A second through hole is provided inside the main positioning member 2 at a position on one side of the liquid guide hole 14. The second through hole communicates the liquid guide hole 14 with the inner cavity of the air bag 15. The inner contact member 91 and the air bag 15 can extend into the inner cavity of the sprocket box. A convex block structure is provided on the left inner wall of the transverse sliding cavity 8 at a position corresponding to the outer contact member 90. The lengths of the longitudinal steel cable 7 and the transverse steel cable 11 are the same. During the outward movement of the above-mentioned longitudinal contact member 4, outer contact member 90 and inner contact member 91, the three will squeeze the liquid medium in the longitudinal sliding cavity 3 and the transverse sliding cavity 8 into the air bag 15 through the liquid guide hole 14 and the second through hole, causing the air bag 15 to expand and extend into the inner cavity of the sprocket box. After that, the expanded air bag 15 contacts the wall of the sprocket box, thereby applying an outward extrusion force to the sprocket box. By combining the outward extrusion force with the downward pressure of the existing pressure plate, the clamping effect on the sprocket box is improved, and the probability of the boring accuracy being affected is reduced. In addition, during the above process, the inner contact member 91 synchronously extends into the inner cavity of the sprocket box, so that the air bag 15 expanding in the inner cavity of the sprocket box will be jointly limited by the inner contact member 91 and the wall of the sprocket box, causing the continuously expanding air bag 15 to deform to a certain extent and further contact the wall of the sprocket box, thereby further improving the clamping effect on the sprocket box and reducing the probability of the boring accuracy being affected. After that, when the boring machine bores the sprocket box, since the boring position is in the middle of the sprocket box, the inner contact member 91 protects the air bag 15 to prevent the cutting tool of the boring machine from contacting the air bag 15 and causing damage to the air bag 15.

[0034] The usage method (working principle) of the present invention is as follows:

[0035] During operation, first, the staff is required to place the sprocket box into the grooves of the main positioning member 2 and the secondary positioning member. After that, the power mechanism (prior art) is used to drive the pressure plate downward to clamp the sprocket box. At the same time, the hydraulic mechanism 6 contracts, causing the longitudinal steel rope 7 and the transverse steel rope 11 to relax. As a result, the longitudinal elastic member 5 and the transverse elastic member 10 release their elastic forces, driving the longitudinal contact member 4 and the inner contact member 91 to move outward and extend. The longitudinal contact member 4 contacts and presses the side of the sprocket box, while the inner contact member 91 extends into the inner cavity of the sprocket box. At the same time, when the inner contact member 91 extends, it drives the latch 13 to move rightward in the card slot 12. After that, when the latch 13 moves rightward to the limit position, it drives the outer contact member 90 to extend outward and press the side of the sprocket box. During the extension process of the longitudinal contact member 4, the inner contact member 91, and the outer contact member 90, the three will press the liquid medium in the longitudinal sliding cavity 3 and the transverse sliding cavity 8, causing the liquid to enter the airbag 15 through the liquid guiding hole 14 and the second through hole, making the airbag 15 expand and extend into the inner cavity of the sprocket box. After that, the continuously expanding airbag 15 is jointly limited and pressed by the inner contact member 91 and the inner wall of the sprocket box, deforming and further contacting the inner wall of the sprocket box. Then, when the longitudinal contact member 4, the inner contact member 91, and the outer contact member 90 stop extending, the boring machine is operated to make the tool cut a hole at the middle position of the sprocket box. After the hole cutting is completed, the tool and the pressure plate are removed. At the same time, the hydraulic mechanism 6 is extended, causing the longitudinal steel rope 7 and the transverse steel rope 11 to be tightened, pulling the longitudinal contact member 4 and the transverse contact member 9 to contract, and resetting the above structure. This is one working cycle.

[0036] Embodiment 2

[0037] Different from Embodiment 1, the latch 13 is provided as a complete block structure. A deflation groove is opened at the left side position of the inner part of the outer contact member 90 in the card slot 12. One side of the deflation groove communicates with the card slot 12, and the other side of the deflation groove communicates with the cavity at the left side position of the transverse contact member 9 in the transverse sliding cavity 8. Through the setting of the deflation groove, the moving resistance of the latch 13 in the card slot 12 is reduced.

[0038] Please refer to Figure 6, a liquid medium is filled in the cavity on the right side of the clamping block 13 in the card slot 12. A support cavity 16 is symmetrically arranged in the front and back inside the inner contact member 91. A support member 17 is hermetically and slidably installed in the support cavity 16. An infusion hole 18 is arranged on the left side of the support cavity 16 inside the inner contact member 91. One side of the infusion hole 18 is communicated with the cavity on the right side of the clamping block 13 in the card slot 12, and the other side of the infusion hole 18 is communicated with the cavity on the left side of the support member 17 in the support cavity 16. When the clamping block 13 moves to the extreme right in the card slot 12, a part of the plate body of the support member 17 extends out of the support cavity 16 and contacts the upper and lower wall bodies of the sprocket wheel box. During the process of the inner contact member 91 moving outwards, the clamping block 13 will squeeze the liquid medium in the card slot 12, so that the liquid medium enters the support cavity 16 through the infusion hole 18, thereby driving the support member 17 to extend obliquely and contact the upper and lower inner walls of the sprocket wheel box. An outward extrusion force is applied to the wheel box through the support member 17, so as to further improve the clamping and fixing effect on the sprocket wheel box.

[0039] The usage method (working principle) of the present invention is as follows:

[0040] During operation, first, the operator places the sprocket box into the grooves of the main positioning member 2 and the secondary positioning member. Then, the power mechanism (prior art) drives the pressure plate to move downward and clamp the sprocket box. At the same time, the hydraulic mechanism 6 contracts, causing the longitudinal steel rope 7 and the transverse steel rope 11 to relax. As a result, the longitudinal elastic member 5 and the transverse elastic member 10 release their elastic forces and drive the longitudinal contact member 4 and the inner contact member 91 to move outward and extend. The longitudinal contact member 4 contacts and presses the side surface of the sprocket box, while the inner contact member 91 extends into the inner cavity of the sprocket box. At the same time, when the inner contact member 91 extends, it drives the block 13 to press the liquid medium in the card slot 12, causing the outer contact member 90 to extend outward and press the side surface of the sprocket box. After that, the outer contact member 90 stops moving, while the inner contact member 91 continues to move outward. As a result, the block 13 continues to press the liquid medium in the card slot 12, causing the medium to enter the support cavity 16 through the liquid infusion hole 18 and push the support member 17 to extend obliquely. Finally, the support member 17 contacts and presses the inner wall of the sprocket box. During the extension process of the longitudinal contact member 4, the inner contact member 91, and the outer contact member 90, the three will press the liquid medium in the longitudinal sliding cavity 3 and the transverse sliding cavity 8, causing the liquid to enter the airbag 15 through the liquid guide hole 14 and the second through hole, causing the airbag 15 to expand and extend into the inner cavity of the sprocket box. After that, the continuously expanding airbag 15 is jointly limited and pressed by the inner contact member 91 and the inner wall of the sprocket box, causing it to deform and further contact the inner wall of the sprocket box. Then, when the longitudinal contact member 4, the inner contact member 91, and the outer contact member 90 stop extending, the boring machine is operated to make the tool cut a hole in the middle position of the sprocket box. After that, when the hole cutting is completed, the tool and the pressure plate are removed. At the same time, the hydraulic mechanism 6 extends, causing the longitudinal steel rope 7 and the transverse steel rope 11 to be tightened, thereby pulling the longitudinal contact member 4 and the transverse contact member 9 to contract, causing the above structure to reset. This is one working cycle.

[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping device for a sprocket box of a micro-tiller, comprising a workbench (1). A main positioning member (2) is fixedly installed at the left side position of the upper surface of the workbench (1). A square groove is formed on the right side surface of the main positioning member (2). A secondary positioning member is fixedly installed at the right side position of the upper surface of the workbench (1). A sprocket box is jointly installed between the main positioning member (2) and the secondary positioning member. A pressure plate is installed at the middle position of the upper surface of the workbench (1), and it is characterized in that: Longitudinal sliding chambers (3) are provided at positions on both the upper and lower sides of the square groove inside the main positioning member (2). A longitudinal contact member (4) with a plate body passing through the port of the longitudinal sliding chamber (3) is slidably installed in the longitudinal sliding chamber (3). The longitudinal contact member (4) can contact and press the side surface of the sprocket box. A longitudinal elastic member (5) is fixedly installed between the side surface of the piston end of the longitudinal contact member (4) facing away from the square groove and the wall body of the longitudinal sliding chamber (3). At the left position of the main positioning member (2), inclined surfaces symmetrically arranged up and down are provided. A hydraulic mechanism (6) is installed on the inclined surface. One side of the output rod of the hydraulic mechanism (6) is hinged with a longitudinal steel cable (7). The other end of the longitudinal steel cable (7) is fixedly connected to the piston end of the longitudinal contact member (4). Transverse sliding chambers (8) symmetrically arranged up and down are provided at positions on the left side of the square groove inside the main positioning member (2). A transverse contact member (9) with a plate body passing through the port of the transverse sliding chamber (8) is slidably installed in the transverse sliding chamber (8). A transverse elastic member (10) is fixedly installed between the side surface of the piston end of the transverse contact member (9) facing away from the square groove and the wall body of the transverse sliding chamber (8). The other side of the output rod of the hydraulic mechanism (6) is hinged with a transverse steel cable (11). The other end of the transverse steel cable (11) is fixedly connected to the piston end of the transverse contact member (9); The piston end of the longitudinal contact member (4) forms a sealed sliding connection with the longitudinal sliding chamber (3), and the plate body of the longitudinal contact member (4) forms a sealed sliding connection with the port of the longitudinal sliding chamber (3). A liquid medium is filled in the cavity of the longitudinal sliding chamber (3) where the plate body of the longitudinal contact member (4) is installed; The transverse contact member (9) is divided into an inner contact member (91) and outer contact members (90) arranged on the front and rear sides of the inner contact member (91). The outer contact members (90) can press the side surface of the sprocket box. A sealed sliding connection is formed between the outer contact members (90) and the inner contact member (91). The piston ends of the outer contact members (90) and the inner contact member (91) both form sealed sliding connections with the transverse sliding chamber (8). The plate bodies of the outer contact members (90) and the inner contact member (91) both form sealed sliding connections with the ports of the transverse sliding chamber (8). A liquid medium is filled in the cavity of the transverse sliding chamber (8) where the plate bodies of the outer contact members (90) and the inner contact member (91) are installed. A transverse elastic member (10) is fixedly installed between the side surface of the piston end of the inner contact member (91) facing away from the square groove and the wall body of the transverse sliding chamber (8). The other end of the transverse steel cable (11) is fixedly connected to the piston end of the inner contact member (91); A liquid guiding hole (14) is formed inside the main positioning member (2) at a position between adjacent longitudinal sliding cavities (3) and transverse sliding cavities (8) for communicating the cavity of the longitudinal sliding cavity (3) where the plate body with the longitudinal contact member (4) installed and the cavity of the transverse sliding cavity (8) where the plate bodies with the outer contact member (90) and the inner contact member (91) installed. On the left side wall body of the square groove, air bags (15) are symmetrically installed up and down. The air bags (15) are close to the longitudinal sliding cavity (3). The air bags (15), the inner contact member (91) and the inner cavity of the sprocket box are at the same horizontal height. A second through hole is formed inside the main positioning member (2) at a position on one side of the liquid guiding hole (14) for communicating the liquid guiding hole (14) with the inner cavity of the air bag (15). On the left inner wall of the transverse sliding cavity (8) at a position corresponding to the outer contact member (90), a convex block structure is provided. The lengths of the longitudinal steel rope (7) and the transverse steel rope (11) are the same; The inner contact member (91) and the air bag (15) can extend into the inner cavity of the sprocket box. The inflated air bag (15) is jointly limited and extruded by the inner contact member (91) and the inner wall of the sprocket box to generate deformation and further contact the inner wall of the sprocket box.

2. The clamping device of a micro-tiller sprocket box according to claim 1, characterized in that: A clamping groove (12) is formed on the side surface of the outer contact member (90) facing the inner contact member (91). A clamping block (13) which is in sealed sliding connection with the clamping groove (12) is fixedly installed on the side surface of the inner contact member (91) facing the clamping groove (12).

3. The clamping device of a micro-tiller sprocket box according to claim 2, characterized in that: A first through hole is formed through the clamping block (13) for communicating the cavities of the clamping groove (12) on the left and right sides of the clamping block (13).

4. The clamping device for the sprocket box of a micro-tiller according to claim 2, characterized in that: The clamping block (13) is arranged as a complete block structure. A deflation groove is formed inside the outer contact member (90) at a position on the left side of the clamping groove (12) for communicating the clamping groove (12) with the cavity of the transverse sliding cavity (8) at a position on the left side of the transverse contact member (9).

5. The clamping device of a micro-tiller sprocket box according to claim 4, characterized in that: The cavity of the clamping groove (12) on the right side of the clamping block (13) is filled with a liquid medium. Support cavities (16) are symmetrically arranged front and back inside the inner contact member (91). Support members (17) are hermetically and movably installed in the support cavities (16). An infusion hole (18) is formed inside the inner contact member (91) at a position on the left side of the support cavity (16) for communicating the cavity of the clamping groove (12) on the right side of the clamping block (13) with the cavity of the support cavity (16) on the left side of the support member (17).

Images