CN218874370U

CN218874370U - Tightening device

Info

Publication number: CN218874370U
Application number: CN202223107192.5U
Authority: CN
Inventors: 刘加华; 邹春阳; 王永红; 聂一彪; 倪川皓
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-04-18
Anticipated expiration: 2032-11-22

Abstract

The utility model discloses a screwing device, screwing device is including screwing up the component, quick-witted head and slip cap trade, quick-witted head trade is cylindricly and including the moment of torsion link that is equipped with the moment of torsion connecting hole and the transmission link who is connected with screwing up the component transmission, the perisporium of moment of torsion connecting hole is equipped with the steel ball accommodation hole that runs through and hold the steel ball along the wall thickness direction, slip cap cover is established on quick-witted head's periphery wall, the internal perisporium of slip cap is equipped with the circumference spacing groove, along quick-witted head trade axial, slip cap can slide with loosening reciprocal between the slip position at locking slip position, loosening the slip position, the circumference spacing groove aligns with the steel ball accommodation hole and holds the steel ball with the part, slide the position at the locking, circumference spacing groove and steel ball accommodation hole axial dislocation, the internal perisporium of slip cap partly impresses the moment of torsion connecting hole with the steel ball, slide cap through the slip position with loosen the slip position between the realization quick connection or the dismantlement of the axle of screwing up of quick-change head and being used for transmission moment of torsion, the high speed joint operation is convenient, and is applicable to automatic equipment.

Description

Tightening device

Technical Field

The utility model belongs to the mechanical assembly field, concretely relates to screw up device.

Background

For some devices with complicated structures, such as hydraulic valve blocks, when parts are assembled, tightening devices with various specifications are used for assembling bolts or pipe joints with different models. Under the prior art, a combined wrench is often adopted to assemble a bolt or a pipe joint, one handle corresponds to a plurality of types of tool bits or sleeves, but the tool bits or the sleeves need to be replaced manually by an operator when being replaced, and the combined wrench is not suitable for automatic assembly.

Disclosure of Invention

The utility model aims at providing a screw up device, this screw up device equipment is convenient, need not the manual change of operator, is applicable to automatic equipment.

In order to realize the above-mentioned purpose, the utility model provides a screwing device, wherein, screwing device is including screwing up the component, quick-change head and sliding sleeve, the quick-change head is cylindricly and including the moment of torsion link that is equipped with the moment of torsion connecting hole and the transmission link of being connected with the transmission of screwing up the component, the perisporium of moment of torsion connecting hole is equipped with the steel ball accommodation hole that runs through and hold the steel ball along the wall thickness direction, the sliding sleeve cover is established on the periphery wall of quick-change head, the internal perisporium of sliding sleeve is equipped with the circumference spacing groove, along the axial of quick-change head, the sliding sleeve can slide with loosen reciprocal the sliding between the sliding position at the locking, loosening the sliding position, the circumference spacing groove aligns with the steel ball accommodation hole and holds the steel ball with the part, at the locking sliding position, circumference spacing groove and steel ball accommodation hole axial dislocation, the internal perisporium of sliding sleeve partly impresses the steel ball torque connecting hole.

The embodiment of the utility model provides an in, be formed with protruding tang on the periphery wall of fast change head, the internal perisporium of slip cap is equipped with the tang groove of counterpointing with protruding tang, screws up the device and still locates the compression spring on the periphery wall of fast change head and hold in the tang inslot including the cover, compression spring's one end elasticity is supported and is pressed the step portion of protruding tang, and other end elasticity is supported and is pressed the step portion in tang groove.

The embodiment of the utility model provides an in, the clamp has the backstop jump ring that is used for preventing the outside roll-off of slip cap on the periphery wall of quick-witted head that trades.

In the embodiment of the present invention, the torque connection hole is a polygonal hole.

The embodiment of the utility model provides an in, the coaxial dead center axle that stretches out of transmission link end of quick-witted head that trades, the component of screwing up is held and is equipped with wearing of central connecting hole and link to hold including screwing up, and the dead center axle is along axial cartridge in central connecting hole.

The embodiment of the utility model provides an in, screw up the component for screwing up the sleeve, screw up the end and be equipped with from the tightening hole of terminal surface indent, the central connecting hole axial switches on the tightening hole, and the tightening hole is worn out to centering axle axial.

The embodiment of the utility model provides an in, the coaxial connecting axle that stretches out of drive connection end of quick-witted head that trades, screw up the device and include gear shaft subassembly and connecting sleeve, the gear shaft subassembly including the driving shaft that is equipped with the driving gear and the driven shaft that is equipped with driven gear, connecting sleeve one end cup joints the connecting axle, the driving shaft is cup jointed to the other end coaxial, wherein, the driving shaft is arranged side by side along radially with the driven shaft, screws up the component and installs in the outer tip of stating the driven shaft.

In an embodiment of the utility model, the tightening member is a tightening nut.

The embodiment of the utility model provides an in, screw up the device and include parallel spaced arrangement's first mounting panel and second mounting panel, the both ends of driving shaft and driven shaft respectively all rotatably install between first mounting panel and second mounting panel.

The embodiment of the utility model provides an in, tightening device includes coupling fastener and prevents the bull stick, and coupling fastener passes first mounting panel and second mounting panel, prevents that bull stick and gear shaft subassembly interval set up, prevents the first mounting panel of one end fixed connection of bull stick, and the other end passes the second mounting panel and follows axial extension.

The embodiment of the utility model provides an in, screw up the device and include the electronic axle of screwing up of being connected with the transmission of the moment of torsion link end of quick-change head.

In an embodiment of the present invention, the tightening device includes: the mounting platform is a fixed platform or can move in space, the guide rail slider mechanism is arranged on the mounting platform and comprises a slider provided with an electric tightening shaft and a linear guide rail matched with the slider, the linear guide rail is parallel to the electric tightening shaft, and the servo motor drives the slider and the electric tightening shaft to move along the linear guide rail.

Through the technical scheme, the embodiment of the utility model provides a screw up device has following beneficial effect:

when the tightening device is used, the tightening device comprises a tightening member, a quick-change head and a sliding sleeve, the quick-change head is cylindrical and comprises a torque connecting end provided with a torque connecting hole and a transmission connecting end in transmission connection with the tightening member, a steel ball accommodating hole penetrating in the wall thickness direction and accommodating a steel ball is formed in the peripheral wall of the quick-change head, the sliding sleeve is sleeved on the peripheral wall of the quick-change head, a circumferential limiting groove is formed in the inner peripheral wall of the sliding sleeve, the sliding sleeve can slide in a reciprocating mode between a locking sliding position and a loosening sliding position along the axial direction of the quick-change head, the circumferential limiting groove is aligned with the steel ball accommodating hole to partially accommodate the steel ball when the sliding sleeve is loosened, the circumferential limiting groove and the steel ball accommodating hole are axially staggered at the locking sliding position, the steel ball is partially pressed into the torque connecting hole by the inner peripheral wall of the sliding sleeve, and then the quick-change head and the tightening shaft for transmitting torque are quickly connected or detached by moving between the locking sliding sleeve and the locking sliding position and the loosening position, and the quick-change head is convenient to operate and suitable for automatic assembly.

Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments, but do not limit the embodiments. In the drawings:

fig. 1 is a sectional view of a tightening apparatus according to an embodiment of the present invention;

fig. 2 is a sectional view of a tightening apparatus according to another embodiment of the present invention;

fig. 3 is a schematic structural view of a tightening apparatus according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a mounting platform according to an embodiment of the present invention.

Description of the reference numerals

91 tightening member 911 tightening end

912 through end 913 center connection hole

914 screwing hole 92 quick-change head

921 Torque connection hole 922 torque connection end

923 Transmission link 924 steel ball

925 steel ball containing hole 926 centering shaft

927 connecting shaft 93 sliding sleeve

931 peripheral limiting groove 932 rabbet groove

933 compression spring 934 backstop jump ring

94 Gear shaft assembly 941 drive shaft

Driven shaft 942 95 connecting sleeve

96 first mount plate 97 second mount plate

98 connecting fastener 99 anti-rotation rod

901 electric tightening shaft 902 mounting platform

903 guide rail sliding block mechanism 904 servo motor

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.

A tightening device according to the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a tightening device, tightening device includes:

the tightening member 91;

the quick-change head 92 is cylindrical and comprises a torque connecting end 922 provided with a torque connecting hole 921 and a transmission connecting end 923 in transmission connection with the tightening member 91, and the peripheral wall of the torque connecting hole 921 is provided with a steel ball accommodating hole 925 which penetrates through the wall thickness direction and accommodates a steel ball 924; and

the sliding sleeve 93 is sleeved on the outer peripheral wall of the quick-change head 92, and a circumferential limiting groove 931 is formed in the inner peripheral wall of the sliding sleeve 93;

the sliding sleeve 93 can slide in a reciprocating manner between a locking sliding position and a releasing sliding position along the axial direction of the quick-change head 92, the circumferential limiting groove 931 is aligned with the steel ball accommodating hole 925 to partially accommodate the steel ball 924 when the sliding position is released, the circumferential limiting groove 931 is axially staggered with the steel ball accommodating hole 925 when the sliding position is locked, and the steel ball 924 is partially pressed into the torque connecting hole 921 by the inner circumferential wall of the sliding sleeve 93.

When the tightening device is used, the tightening device comprises a tightening member 91, a quick-change head 92 and a sliding sleeve 93, the quick-change head 92 is cylindrical and comprises a torque connection end 922 provided with a torque connection hole 921 and a transmission connection end 923 in transmission connection with the tightening member 91, a steel ball accommodating hole 925 which penetrates in the wall thickness direction and accommodates a steel ball 924 is provided in the circumferential wall of the torque connection hole 921, the sliding sleeve 93 is sleeved on the circumferential wall of the quick-change head 92, a circumferential limiting groove 931 is provided in the inner circumferential wall of the sliding sleeve 93, the sliding sleeve 93 can slide back and forth in the axial direction of the quick-change head 92 between a locking sliding position and a releasing sliding position, the circumferential limiting groove 931 is aligned with the steel ball accommodating hole 925 to partially accommodate the steel ball 924 in the releasing sliding position, the circumferential limiting groove 931 is axially misaligned with the steel ball accommodating hole 925 in the locking sliding position, the steel ball 924 is partially pressed into the torque connection hole 921 by the inner circumferential wall of the sliding sleeve 93, and the sliding sleeve 93 moves between the locking sliding position and the locking sliding position to realize quick connection or disassembly of the quick-change head 92 and the tightening shaft for transmitting torque, the automatic assembly.

Specifically, the driving connection end 923 of the tightening member 91 and the quick-change head 92 is formed with corresponding pin connection holes, and the connection of the tightening member 91 and the quick-change head 92 is realized by positioning pins penetrating the pin connection holes. Furthermore, the positioning pin can be preferably an elastic cylindrical pin which has good elasticity and shearing resistance and is suitable for transmitting torque.

In the embodiment of the utility model provides an in, be formed with protruding tang on the periphery wall of quick change head 92, the internal perisporium of sliding sleeve 93 is equipped with the tang groove 932 of counterpointing with protruding tang, and screwing up device still locates on the periphery wall of quick change head 92 and holds the compression spring 933 in tang groove 932 including the cover, and the one end elasticity of compression spring 933 is supported and is pressed the step portion of protruding tang, and the other end elasticity is supported and is pressed the step portion of tang groove 932. When no external force is applied, the sliding sleeve 93 is in a locking sliding position under the action of the compression spring 933; when the sliding sleeve 93 receives an axial force toward the tightening member 91, the compression spring 933 is compressed by a force, and the sliding sleeve 93 is in a loose sliding position; when the axial force to the tightening member 91 is removed, the sliding sleeve 93 returns to the locked sliding position under the action of the compression spring 933, and the entire process can be achieved with only a single axial force to the tightening member 91.

The embodiment of the utility model provides an in, the clamp has the backstop jump ring 934 that is used for preventing the outside roll-off of slip cap 93 on the periphery wall of quick change head 92. Specifically, be formed with the jump ring mounting groove that supplies backstop jump ring 934 to install on the periphery wall of quick change head 92, backstop jump ring 934 clamp has guaranteed the stability of backstop jump ring 934 clamp on the jump ring mounting groove.

The embodiment of the utility model provides an in, moment of torsion connecting hole 921 is the multilateral hole, simple structure, the transmission moment of torsion of being convenient for. Specifically, the torque connection hole 921 is preferably a square hole, facilitating machining.

In the embodiment of the present invention, the transmission connection end 923 of the quick-change head 92 coaxially extends to form a centering shaft 926, the tightening member 91 includes a tightening end 911 and a penetrating end 912 provided with a central connection hole 913, and the centering shaft 926 is axially inserted into the central connection hole 913. For joining tubular workpieces (e.g., pipe joints), the centering shaft 926 may extend into the tubular workpiece to aid in positioning.

In the embodiment of the present invention, the tightening member 91 is a tightening sleeve, the tightening end 911 is provided with a tightening hole 914 recessed from the end surface, the central connection hole 913 axially connects the tightening hole 914, and the centering shaft 926 axially penetrates through the tightening hole 914. Specifically, the sleeve of screwing up is preferably the magnetic sleeve, because the material of the work piece that is used for connecting generally is the metal, selects for use the magnetic sleeve can adsorb the work piece that needs to screw up, avoids screwing up the device in the course of the work, and the work piece drops from screwing up the device, is applicable to automatic equipment. The tightening member 91 is not limited to the tightening socket, and the tightening member 91 may be provided as a tightening nut, a screwdriver head, or the like depending on the type of workpiece to be tightened.

As shown in fig. 2 and fig. 3, in the embodiment of the present invention, the transmission connection end 923 of the quick-change head 92 coaxially extends to have the connection shaft 927, the tightening device includes the gear shaft assembly 94 and the connection sleeve 95, the gear shaft assembly 94 includes the driving shaft 941 provided with the driving gear and the driven shaft 942 provided with the driven gear, one end of the connection sleeve 95 is sleeved with the connection shaft 927, and the other end is coaxially sleeved with the driving shaft 941, wherein the driving shaft 941 and the driven shaft 942 are arranged side by side along the radial direction, and the tightening member 91 is installed at the outer end of the driven shaft 942. The driving shaft 941 and the driven shaft 942 are not on the same axis, so that eccentric screwing of the connecting piece can be realized; through the connecting sleeve 95, the quick-change head 92 is indirectly connected with the driving shaft 941, and interference caused by the quick-change head 92 in the case of limited installation space is avoided. Further, the adjustment of the eccentric size of the tightening member 91 can be achieved by adjusting the center distance between the driving shaft 941 and the driven shaft 942 according to the range of the installation space when the tightening device is operated.

In an embodiment of the present invention, the tightening member 91 is a tightening nut for tightening a connecting piece having an inner angle. The tightening member 91 is not limited to a tightening nut, and may be provided as a tightening sleeve, a driver bit, or the like depending on the type of workpiece to be tightened.

In the embodiment of the present invention, the tightening device includes the first mounting plate 96 and the second mounting plate 97 arranged in parallel at intervals, and the respective two ends of the driving shaft 941 and the driven shaft 942 are rotatably mounted between the first mounting plate 96 and the second mounting plate 97. Specifically, first mounting panel 96 is kept away from adapter sleeve 95 and is set up, and second mounting panel 97 is close to adapter sleeve 95 and sets up, and the driving gear of driving shaft 941 and the driven gear setting of driven shaft 942 are between first mounting panel 96 and second mounting panel 97, and second mounting panel 97 is stretched out to the one end of driving shaft 941, and adapter sleeve 95 overlaps to be established and to stretch out on the one end of second mounting panel 97 and pass through the elastic pin connection at driving shaft 941, and first mounting panel 96 formation outer tip is stretched out to the one end of driven shaft 942. Further, the joints of the driving shaft 941 and the first and second mounting

plates

96 and 97 and the joints of the driven shaft 942 and the first and second mounting

plates

96 and 97 are provided with bearings to reduce the friction force applied to the driving shaft 941 and the driven shaft 942 during the movement.

In the embodiment of the present invention, the tightening device includes the connection fastener 98 and the rotation preventing rod 99, the connection fastener 98 penetrates the first mounting plate 96 and the second mounting plate 97, the rotation preventing rod 99 is disposed at an interval with the gear shaft assembly 94, the one end of the rotation preventing rod 99 is fixedly connected to the first mounting plate 96, and the other end of the rotation preventing rod 99 penetrates the second mounting plate 97 and extends along the axial direction. The rotation preventing bar 99 serves to fix the tightening device and prevent the tightening device from rotating due to torque when performing eccentric tightening.

In the embodiment of the present invention, the tightening device includes an electric tightening shaft 901 in transmission connection with the torque connection end 922 of the quick-change head 92. The electric tightening shaft 901 can set the torque according to actual needs, so that the tightening torque reaches the standard, the bolt is prevented from loosening, and the tightening efficiency is improved. Specifically, a limit groove for receiving the steel ball 924 is formed at one end of the electric tightening shaft 901 penetrating into the torque connection hole 921, when the electric tightening shaft 901 is connected with the quick-change head 92, the sliding sleeve 93 moves from the release sliding position to the lock sliding position, the steel ball 924 is partially pressed into the torque connection hole 921, and the part of the steel ball 924 pressed into the torque connection hole 921 is embedded into the limit groove to limit the quick-change head 92 from being pulled out of the electric tightening shaft 901.

In an embodiment of the present invention, the tightening device includes: the device comprises a mounting platform 902, a guide rail sliding block mechanism 903 and a servo motor 904, wherein the mounting platform 902 is a fixed platform or can move spatially, the guide rail sliding block mechanism 903 is arranged on the mounting platform 902 and comprises a sliding block provided with a power tightening shaft 901 and a linear guide rail matched with the sliding block, the linear guide rail is parallel to the power tightening shaft 901, and the servo motor 904 drives the sliding block and the power tightening shaft 901 to move along the linear guide rail. Specifically, mounting platform 902 includes a first mounting platform, a second mounting platform, and a robot mounting platform. The first mounting platform is a fixed platform, and the electric tightening shaft 901 is driven by the servo motor 904 to perform lifting motion along a vertically arranged linear guide rail; the second mounting platform is a movable mounting platform and can perform vertical lifting motion and horizontal linear motion, and the electric tightening shaft 901 performs linear motion along a linear guide rail which is horizontally arranged under the driving of the servo motor 904; the robot mounting platform comprises a six-axis robot capable of performing spatial motion, a base is mounted at one end of the six-axis robot, a guide rail slider mechanism 903 is arranged on the base, and an electric tightening shaft 901 performs linear motion along a linear guide rail under the driving of a servo motor 904.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A tightening device, characterized by comprising:

a tightening member (91);

the quick-change head (92) is cylindrical and comprises a torque connecting end (922) provided with a torque connecting hole (921) and a transmission connecting end (923) in transmission connection with the tightening component (91), and the peripheral wall of the torque connecting hole (921) is provided with a steel ball accommodating hole (925) which penetrates through the wall thickness direction and accommodates a steel ball (924); and

the sliding sleeve (93) is sleeved on the outer peripheral wall of the quick-change head (92), and a circumferential limiting groove (931) is formed in the inner peripheral wall of the sliding sleeve (93);

the sliding sleeve (93) can slide in a reciprocating mode between a locking sliding position and a loosening sliding position along the axial direction of the quick-change head (92), the circumferential limiting groove (931) is aligned with the steel ball containing hole (925) to partially contain the steel ball (924) in the loosening sliding position, the circumferential limiting groove (931) is axially staggered with the steel ball containing hole (925) in the locking sliding position, and the steel ball (924) is partially pressed into the torque connecting hole (921) through the inner circumferential wall of the sliding sleeve (93).

2. The tightening device according to claim 1, wherein a male end is formed on an outer peripheral wall of the quick-change head (92), a male end groove (932) is formed on an inner peripheral wall of the sliding sleeve (93) to be aligned with the male end groove, the tightening device further comprises a compression spring (933) which is sleeved on the outer peripheral wall of the quick-change head (92) and accommodated in the male end groove (932), one end of the compression spring (933) elastically presses against a step portion of the male end groove, and the other end elastically presses against a step portion of the male end groove (932).

3. Tightening device according to claim 1, characterized in that the outer peripheral wall of the quick-change head (92) is provided with a stop clip (934) which prevents the sliding sleeve (93) from sliding outwards.

4. The tightening device according to claim 1, characterized in that the torque connection hole (921) is a polygonal hole.

5. The tightening device according to any one of claims 1 to 4, wherein a centering shaft (926) coaxially protrudes from the transmission connection end (923) of the quick-change head (92), the tightening member (91) includes a tightening end (911) and a through connection end (912) provided with a central connection hole (913), and the centering shaft (926) is axially inserted into the central connection hole (913).

6. The tightening device according to claim 5, characterized in that the tightening member (91) is a tightening sleeve, the tightening end (911) is provided with a tightening hole (914) recessed from an end surface, the central connection hole (913) axially communicates with the tightening hole (914), and the centering shaft (926) axially penetrates through the tightening hole (914).

7. The tightening device according to any one of claims 1 to 4, wherein the transmission connection end (923) of the quick-change head (92) coaxially protrudes with a connection shaft (927), the tightening device comprising:

a gear shaft assembly (94) including a driving shaft (941) provided with a driving gear and a driven shaft (942) provided with a driven gear;

one end of the connecting sleeve (95) is sleeved with the connecting shaft (927), and the other end of the connecting sleeve is coaxially sleeved with the driving shaft (941);

wherein the driving shaft (941) and the driven shaft (942) are arranged side by side in a radial direction, and the tightening member (91) is installed at an outer end portion of the driven shaft (942).

8. The tightening device according to claim 7, characterized in that the tightening member (91) is a tightening nut.

9. The tightening device according to claim 7, characterized in that the tightening device includes first and second mounting plates (96, 97) arranged in parallel spaced apart, and the driving and driven shafts (941, 942) are rotatably mounted at respective both ends between the first and second mounting plates (96, 97).

10. The tightening device according to claim 9, characterized by comprising:

a connecting fastener (98) passing through the first mounting plate (96) and the second mounting plate (97); and

prevent bull stick (99), with gear shaft subassembly (94) interval sets up, prevent one end fixed connection of bull stick (99) first mounting panel (96), the other end passes second mounting panel (97) and extend along the axial.

11. The tightening device according to claim 1, characterized by comprising:

and the electric tightening shaft (901) is in transmission connection with the torque connecting end (922) of the quick-change head (92).

12. The tightening device according to claim 11, characterized by comprising:

a mounting platform (902) that is a fixed platform or is capable of spatial movement;

the guide rail sliding block mechanism (903) is arranged on the mounting platform (902) and comprises a sliding block provided with the electric tightening shaft (901) and a linear guide rail matched with the sliding block, and the linear guide rail is parallel to the electric tightening shaft (901);

and the servo motor (904) drives the sliding block and the electric tightening shaft (901) to move along the linear guide rail.