Linear rail self-locking device

Abstract

The utility model discloses a linear rail self-locking device which is characterized in that a sliding seat can be fixedly mounted on the end face of at least one end of a sliding block of a linear rail along the sliding direction of the sliding block, the sliding seat can be sleeved on the outer side of a linear rail of the linear rail in a sliding manner, and a left clamping block and a right clamping block can be mounted on the sliding seat in a relative sliding manner along the width direction of the linear rail; the left clamping block and the right clamping block slide relatively to clamp or loosen the surfaces of the two sides of the linear rail in the width direction, the left rocker arm and the right rocker arm are rotationally hinged to the sliding base, one end of the left rocker arm is connected with the left clamping block, and one end of the right rocker arm is connected with the right clamping block. The left rocker arm and the right rocker arm swing around the hinged shaft and can drive the left clamping block and the right clamping block to linearly slide in the width direction of the linear rail, the driving device is installed on the sliding base, and the power output end of the driving device drives the left rocker arm and the right rocker arm to synchronously and reversely rotate. According to the self-locking device, the linear guide rail sliding block can be quickly self-locked and unlocked in the installation and use processes of equipment, and the use safety of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the field of guide rail production, in particular to a linear rail self-locking device. Background Art

[0002] As one of the core components of the equipment, the linear rail plays a guiding and supporting role, but it does not have a self-locking function.

[0003] When the equipment uses compressed air, linear motors, etc. as power devices, the power device lifts the weight 22 to a certain height, and the linear track plays the role of supporting components and guiding. If the equipment suddenly loses air pressure or suddenly loses power and loses power source, the lifted weight and equipment lifting components will slide down rapidly under the action of gravity or inertia, which is very likely to cause safety accidents and equipment damage due to impact.

[0004] When there is a self-locking requirement during the working process of the equipment (such as Figure 1 In the application scenario of the linear rail, it is necessary to develop and adapt related products separately. Generally, an external independent mechanism is used to suppress and ensure that the mobile device carried by the linear rail can reach the required safe state when the pressure is lost. When installing the linear rail or other parts of the equipment where the linear rail is located, it is often necessary to fix the position of the mobile device to avoid interfering with the operation or protecting the stability of the equipment carried by the linear rail, and protecting the safety of operators and equipment;

[0005] Currently, most of the devices on the market use manual clamps 24 to limit the position of the slider. This mechanism needs to be removed after the device is installed, so that the device has no self-locking function when it is running. In addition, the handle design of this self-locking device may interfere with the upper panel 23 of the slider and cannot be used. It has a single use occasion and low efficiency.

[0006] At present, some companies have launched devices specifically for linear rail self-locking, but they need to occupy a large space of the equipment or change the original mechanism design to ensure the installation of the self-locking device. This independently designed self-locking device will increase the complexity of the overall structure of the equipment and the manufacturing cost. Although this device realizes the self-locking function of the linear rail slider, it will occupy a large amount of equipment travel space. In order to meet the equipment travel requirements, it is bound to increase the size of the equipment. It cannot be installed when the equipment space is limited. It is not suitable for compact occasions, and the price is high. In addition, a connecting plate needs to be designed separately to connect with the slider to achieve linkage self-locking, which is not suitable for many occasions. At present, the linear rail self-locking devices developed by Rexroth in Germany need to be configured separately. It needs to add an additional connecting device connected to the slider, which occupies a large space, and the unit price is more than RMB 200, taking the smallest specification 15 as an example, and must be equipped with Rexroth linear rails (Rexroth linear rails are more than twice the price of domestic linear rails). Utility Model Content

[0007] In order to overcome the above defects, the utility model provides a linear rail self-locking device, which can realize self-locking of the linear rail slider according to demand when the equipment is running, has a simple overall structure, a small size and a low price.

[0008] The camming mechanism can be realized by the sliding movement of the left and right sliding blocks, and the sliding movement of the left and right sliding blocks can realize the sliding movement of the camming member, and the camming member can be realized by the sliding movement of the left and right sliding blocks.

[0009] As a further improvement of the utility model, the sliding seat is an inverted U-shaped structure with a cross-section identical to that of the slider of the linear rail, the left clamping block and the right clamping block are symmetrically distributed on both side walls of the inverted U-shaped structure of the sliding seat, and the left rocker arm and the right rocker arm are symmetrically distributed on both sides of the sliding seat along the width direction of the linear rail.

[0010] As a further improvement of the utility model, a piston cavity is formed on the inner side of the sliding seat, and a piston that can slide along the height direction of the linear track is provided in the piston cavity. The outer wall of the piston is in dynamic sealing contact with the inner wall of the piston cavity. A sealed cavity is formed between the piston and one end of the piston cavity. An air inlet and outlet connected to the sealed cavity are provided on the side wall of one end of the piston cavity. The air inlet and outlet can also be connected to an external air source. A piston rod is fixedly connected to the piston, and the piston rod is hingedly connected to the left rocker arm and the right rocker arm. The piston rod drives the left rocker arm and the right rocker arm to rotate synchronously in the opposite direction as the piston reciprocates in a straight line.

[0011] As a further improvement of the utility model, a clamping spring is also provided in the sliding seat, and the clamping spring provides an elastic retaining force to the piston or piston rod along its sliding direction. The elastic retaining force enables the piston rod to maintain the position state of the left clamping block and the right clamping block clamping the side wall of the linear track in the absence of other external forces.

[0012] As a further improvement of the present invention, the left rocker arm and the right rocker arm are V-shaped structures facing each other in the opening direction, and the hinge axes of the left rocker arm and the right rocker arm are located at the inflection point of the V-shaped structure. A through hole is provided on the end surface of the other end of the piston chamber for the end of the piston rod to extend out, and the clamping spring is sleeved on the outside of the piston rod, and the two ends of the clamping spring are respectively tightly pressed against the end surface of the piston and the other end of the piston chamber, and the clamping spring provides an elastic retaining force to the piston toward one end of the piston chamber.

[0013] As a further improvement of the utility model, a three-way exhaust valve is provided on the air inlet and outlet on the side wall of one end of the piston chamber, the first channel of the three-way exhaust valve is connected to the external air source, the second channel of the three-way exhaust valve is connected to the air inlet and outlet of the piston chamber, the third channel of the three-way exhaust valve is connected to the external space, and the first channel and the third channel of the three-way exhaust valve are alternately closed.

[0014] As a further improvement of the present invention, a left clamping seat and a right clamping seat are further provided, the left clamping seat and the right clamping seat are respectively provided with a first elongated guide hole and a second elongated guide hole extending along the width direction of the linear track, and the sliding seat is also symmetrically provided with a left accommodating cavity and a right accommodating cavity extending along the width direction of the linear track, and the left clamping seat and the right clamping seat can be slidably inserted in the left accommodating cavity and the right accommodating cavity respectively, and the left limit column and the right limit column are correspondingly provided on the inner side walls of the left accommodating cavity and the right accommodating cavity, and the left limit column and the right limit column can be relatively slidably inserted in the first elongated guide hole and the second elongated guide hole respectively, and the left clamping block and the right clamping block are respectively fixedly installed on the side wall of the left clamping seat and the right clamping seat facing the linear track, and one end of the left rocker arm and the one end of the right rocker arm respectively maintain close contact with the surface of the left clamping seat and the right clamping seat away from the linear track.

[0015] As a further improvement of the utility model, the left clamping seat and the right clamping seat are respectively provided with a lug structure on one side wall away from the linear track, and one end of the left rocker arm and one end of the right rocker arm are respectively hingedly connected to the lugs on the left clamping seat and the right clamping seat.

[0016] As a further improvement of the utility model, the sliding seat includes a sliding body, an upper cover and a side cover. The sliding seat sleeve is arranged on the outer side of the upper end of the linear track. The upper cover is sealed and fixedly installed on the upper end of the sliding body through a connecting piece. A piston chamber is formed between the sliding body and the upper cover. The side cover is fixedly installed on one side of the lower section of the sliding body along the extension direction of the linear track through a connecting piece. A accommodating chamber is formed between the sliding body and the side cover.

[0017] As a further improvement of the utility model, the side walls of the left clamping block and the right clamping block close to the linear track match the shapes of the left and right sides of the linear track, and the left clamping block and the right clamping block are made of elastic wear-resistant material integrally formed on the left clamping seat and the right clamping seat and are contoured to the two side surfaces of the linear track.

[0018] The beneficial effects of the utility model are as follows: the utility model utilizes the internal space of the slider to form a accommodating cavity therein, and arranges a left clamping block and a right clamping block that can slide relatively, and a left rocker arm and a right rocker arm hinged on the slider, and drives the left rocker arm and the right rocker arm to swing synchronously in the opposite directions through a driving device to drive the left clamping block and the right clamping block to move synchronously to clamp the two side walls in the width direction of the linear track or separate from the linear track, thereby realizing self-locking fixation or unlocking sliding of the slider on the linear track, and the driving device adopts a single-acting cylinder arranged in the slider and a clamping spring as a release and clamping power source, with a simple overall structure, small occupied space, fast response speed, convenient processing and low manufacturing cost, so that the linear rail slider can quickly self-lock and unlock as needed during equipment installation and use, thereby greatly improving the safety of equipment use and avoiding equipment damage caused by sudden gas or power outages during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Use state stereogram for linear rail;

[0020] Figure 2 A front view of the prior art using manual clamps;

[0021] Figure 3 It is the structural principle diagram of the utility model;

[0022] Figure 4 for Figure 3 A magnified view of the middle B section in the unlocked state;

[0023] Figure 5 for Figure 3 The enlarged view of the middle part B in the locked state;

[0024] Figure 6 This is a front view of the utility model in use on one side of the linear rail slider;

[0025] Figure 7 It is a top view of the utility model in use state on one side of the linear rail slider;

[0026] Figure 8 This is a right view of the utility model in use on one side of the linear rail slider;

[0027] Fig. 9 This is a front view of the utility model in use on both sides of the linear rail slider;

[0028] Fig.10 It is a top view of the utility model in use state on both sides of the linear rail slider;

[0029] Fig.11 This is a right view of the utility model in use on both sides of the linear rail slider. DETAILED DESCRIPTION

[0030] Embodiment: A linear rail self-locking device, comprising a sliding seat 1, the sliding seat 1 can be fixedly mounted on the end surface of at least one end of the slider 2 of the linear rail along its sliding direction, the sliding seat 1 can be slidably sleeved on the outer side of the linear rail 3 of the linear rail, and also comprises a left clamping block 4, a right clamping block 5, a left rocker arm 6, a right rocker arm 7 and a driving device, the left clamping block 4 and the right clamping block 5 can be relatively slidably mounted on the sliding seat 1 along the width direction of the linear rail 3, and the left clamping block 4 and the right clamping block 5 can slide relative to each other. To clamp or loosen the two side surfaces of the linear track 3 in the width direction, the left rocker arm 6 and the right rocker arm 7 are respectively rotatably hinged on the sliding seat 1, one end of the left rocker arm 6 is connected to the left clamping block 4, and one end of the right rocker arm 7 is connected to the right clamping block 5. The left rocker arm 6 and the right rocker arm 7 swing around the hinge axis to drive the left clamping block 4 and the right clamping block 5 to slide linearly along the width direction of the linear track 3. The driving device is installed on the sliding seat 1, and the power output end of the driving device drives the left rocker arm 6 and the right rocker arm 7 to rotate synchronously in the opposite direction.

[0031] The self-locking function of the linear rail is realized by relatively sliding the left clamping block 4 and the right clamping block 5 to clamp the linear rail 3. The left clamping block 4 and the right clamping block 5 preferably adopt a contoured structure that matches the outer shape of both sides of the linear rail 3. When in use, the sliding seat 1 and the slider 2 of the linear rail can be assembled together by connecting screws, etc., without the need for an external connecting plate, and occupying a small space of the equipment; it can be suitable for limited self-locking installation space of the slide rail, and after self-locking, the left clamping block 4 and the right clamping block 5 will not scratch the slide rail itself, and the axial stiffness of the linear rail is guaranteed to the greatest extent after self-locking; the left rocker arm 6 and the right rocker arm 7 are used to swing in opposite directions to realize the horizontal drive of the left clamping block 4 and the right clamping block 5. The structure is simple, and the rocker arm is simple in structure compared with the gear rack, occupies a small space, is convenient to process, and has a low manufacturing cost, which is the optimal solution.

[0032] The sliding seat 1 is an inverted U-shaped structure with the same cross section as the slider 2 of the linear rail, the left clamping block 4 and the right clamping block 5 are symmetrically distributed on the two side walls of the inverted U-shaped structure of the sliding seat 1, and the left rocker arm 6 and the right rocker arm 7 are symmetrically distributed on both sides of the sliding seat 1 along the width direction of the linear rail 3. The symmetrical structure makes the clamping force applied by the left clamping block 4 and the right clamping block 5 on both sides of the linear rail 3 consistent, so that the linear rail 3 is subjected to balanced force.

[0033] A piston cavity 8 is formed on the inner side of the sliding seat 1, and a piston 9 is provided in the piston cavity 8 which can slide along the height direction of the linear track 3. The outer wall of the piston 9 is in dynamic sealing contact with the inner wall of the piston cavity 8, and a sealed cavity is formed between the piston 9 and one end of the piston cavity 8. An air inlet and outlet 10 connected to the sealed cavity is provided on the side wall of one end of the piston cavity 8, and the air inlet and outlet 10 can also be connected to an external air source. A piston rod 11 is fixedly connected to the piston 9, and the piston rod 11 is hingedly connected to the left rocker arm 6 and the right rocker arm 7. The piston rod 11 drives the left rocker arm 6 and the right rocker arm 7 to rotate synchronously in the opposite direction with the linear reciprocating motion of the piston 9.

[0034] The general design methodology is used to define the design process model, determine the input, output and working steps, that is, use the most widely used, most convenient and low-cost energy power compressed air in the factory as the power input; use the TRIZ innovation theory black box method to determine the functional expression of the technical system, determine the use of the relatively mature single-acting cylinder form as the release and clamping power source, use the morphological matrix analysis method to obtain the optimal technical solution, and use the rocker arm structure to realize the conversion of the vertical thrust of the cylinder into the horizontal clamping force. In addition, motors and the like can also be used as power sources. This is an equivalent replacement structure that can be easily thought of by technical personnel in this field based on this application, and all of them belong to the protection scope of this application.

[0035] The sliding seat 1 is also provided with a clamping spring 12, which provides an elastic holding force to the piston 9 or the piston rod 11 along its sliding direction, and the elastic holding force makes the piston rod 11 in a position to keep the left clamping block 4 and the right clamping block 5 clamping the side wall of the linear track 3 without being subjected to other external forces. The elastic force of the clamping spring 12 is used as the clamping power. When the external air source does not supply air to the piston chamber 8, the clamping spring 12 pushes the piston 9 to move toward one end of the piston chamber 8, and the air in the sealed cavity at one end of the piston chamber 8 is discharged. At the same time, the piston rod 11 moves toward one end of the piston chamber 8, and the left rocker arm 6 and the right rocker arm 7 rotate synchronously in the opposite direction, so that the left clamping block 4 and the right clamping block 5 clamp the side wall of the linear track 3 at the same time, realizing the function of automatic locking. The clamping spring 12 is used as the locking power. When the air source is suddenly disconnected, the above self-locking device immediately clamps the linear track 3 to realize the self-locking of the linear track, and prevents the equipment from falling downward under the action of its own weight and causing damage.

[0036] The left rocker arm 6 and the right rocker arm 7 are V-shaped structures facing each other in the opening direction, and the hinge axes of the left rocker arm 6 and the right rocker arm 7 are located at the inflection point of the V-shaped structure. A through hole is provided on the end surface of the other end of the piston chamber 8 for the end of the piston rod 11 to extend out, and the clamping spring 12 is sleeved on the outside of the piston rod 11, and the two ends of the clamping spring 12 are respectively tightly pressed against the end surface of the piston 9 and the other end of the piston chamber 8, and the clamping spring 12 provides an elastic retaining force to the piston 9 toward one end of the piston chamber 8.

[0037] A three-way exhaust valve 13 is provided on the air inlet and outlet 10 on the side wall of one end of the piston chamber 8. The first channel P of the three-way exhaust valve 13 is connected to the external air source, the second channel A of the three-way exhaust valve 13 is connected to the air inlet and outlet 10 of the piston chamber 8, and the third channel O of the three-way exhaust valve 13 is connected to the external space. The first channel and the third channel of the three-way exhaust valve 13 are alternately closed. The piston 9 moves in the piston chamber 8 to form a single-acting cylinder structure, which is used as a release and clamping power source, and cooperates with the standard parts of the quick-discharge three-way exhaust valve 13 to realize the air-cutting locking function.

[0038] like Figure 3 As shown, when the slider 2 moves freely (air supply is normal): air enters the first channel of the three-way exhaust valve 13, passes through the second channel (the third channel is in a closed state at this time) and enters the sealed cavity; at this time, the piston 9 is compressed to overcome the elastic force of the clamping spring 12, and the piston rod 11 moves downward. At this time, the left rocker arm 6 and the right rocker arm 7 move downward at the same time at the connection with the piston rod 11. The left rocker arm 6 and the right rocker arm 7 are respectively connected to the left clamping block 4 and the right clamping block 5, so that the left clamping block 4 and the right clamping block 5 move horizontally to the outside of the linear track 3. At this time, the slider 2 can move freely, and the state is as shown in FIG. Figure 4 As shown;

[0039] like Figure 3 As shown, when the slider 2 stops or decelerates (air source interruption): there is no air intake in the first channel of the three-way exhaust valve 13, and the compressed air in the sealed cavity is discharged from the second channel (the first channel is in a closed state at this time) and discharged into the atmosphere through the third channel; at this time, the clamping spring 12 pushes the piston 9 and the piston rod 11 thereon to move upward. At this time, the connection between the left rocker arm 6 and the right rocker arm 7 and the piston rod 11 moves upward at the same time, and the left rocker arm 6 and the right rocker arm 7 are respectively connected to the left clamping block 4 and the right clamping block 5, so that the left clamping block 4 and the right clamping block 5 move horizontally toward the inner side of the linear track 3 and clamp the linear track 3. At this time, the slider 2 stops or decelerates, and the state is as shown in FIG. Figure 5 shown.

[0040] A left clamping seat 14 and a right clamping seat 15 are also provided, and a first elongated guide hole 141 and a second elongated guide hole 151 extending along the width direction of the linear track 3 are respectively provided on the left clamping seat 14 and the right clamping seat 15. A left accommodating cavity and a right accommodating cavity extending along the width direction of the linear track 3 are also symmetrically provided in the sliding seat 1. The left clamping seat 14 and the right clamping seat 15 can be slidably inserted into the left accommodating cavity and the right accommodating cavity respectively. The inner side walls of the left accommodating cavity and the right accommodating cavity correspond to A left limit column 16 and a right limit column 17 are provided, and the left limit column 16 and the right limit column 17 can be inserted into the first elongated guide hole 141 and the second elongated guide hole 151 respectively and can slide relatively, and the left clamping block 4 and the right clamping block 5 are respectively fixedly installed on the side wall of the left clamping seat 14 and the right clamping seat 15 facing the linear track 3, and one end of the left rocker arm 6 and one end of the right rocker arm 7 are respectively in close contact with the surface of the left clamping seat 14 and the right clamping seat 15 away from the linear track 3.

[0041] The left clamping seat 14 and the right clamping seat 15 can be made of metal, which are used to install the left clamping block 4 and the right clamping block 5. When the left clamping seat 14 and the right clamping seat 15 slide in the left accommodating cavity and the right accommodating cavity of the sliding seat 1, the left limit column 16 and the right limit column 17 slide relatively in the first elongated guide hole 141 and the second elongated guide hole 151. The above structure can realize the sliding guidance and sliding distance limitation of the left clamping seat 14 and the right clamping seat 15.

[0042] The left clamping seat 14 and the right clamping seat 15 are provided with lug structures on one side wall away from the linear track 3, and one end of the left rocker arm 6 and one end of the right rocker arm 7 are respectively hingedly connected to the lugs on the left clamping seat 14 and the right clamping seat 15. The left rocker arm 6 and the right rocker arm 7 drive the left clamping seat 14 and the right clamping seat 15 by being hingedly connected to the left clamping seat 14 and the right clamping seat 15. In addition, the left rocker arm 6 and the right rocker arm 7 can also push the left clamping seat 14 and the right clamping seat 15 to slide horizontally to clamp the linear track 3. This method requires the design of a horizontal elastic member to provide a horizontal elastic force to the left clamping seat 14 and the right clamping seat 15 so that they are always in close contact with one end of the left rocker arm 6 and one end of the right rocker arm 7.

[0043] The sliding seat 1 includes a sliding body 18, an upper cover 19 and a side cover 20. The sliding seat 1 is sleeved on the outer side of the upper end of the linear track 3. The upper cover 19 is sealed and fixedly installed on the upper end of the sliding body 18 through a connecting piece 21. A piston chamber 8 is formed between the sliding body 18 and the upper cover 19. The side cover 20 is fixedly installed on one side of the lower section of the sliding body 18 along the extension direction of the linear track 3 through the connecting piece 21. A accommodating chamber is formed between the sliding body 18 and the side cover 20. The sliding seat 1 adopts a split structure. An open groove can be formed at the upper end of the sliding body 18. The piston chamber 8 can be formed by sealing and covering the open outer side of the groove with an upper cover 19. The air inlet and outlet 10 of the piston chamber 8 can be set on the side wall of the groove of the sliding body 18, or can be set on the upper cover 19. The lower section and the upper end of the sliding body 18 can form a step structure. Half of the accommodating chamber is formed on the side wall of the lower section of the sliding body 18, and the other half of the accommodating chamber is formed on the side cover 20. After the side cover 20 is installed on the lower section of the sliding body 18, the two halves of the accommodating chamber are spliced ​​to form a complete accommodating chamber, and the side cover 20 can be just aligned and connected with the upper section of the sliding body 18. The above structure facilitates the processing and assembly of the sliding seat 1.

[0044] The side walls of the left clamping block 4 and the right clamping block 5 close to the linear track 3 match the shapes of the left and right sides of the linear track 3. The left clamping block 4 and the right clamping block 5 are made of elastic wear-resistant materials that are integrally formed on the left clamping seat 14 and the right clamping seat 15 and conform to the two sides of the linear track 3. The left clamping block 4 and the right clamping block 5 are made of elastic wear-resistant materials, which can be used for a long time without being easily worn, and will not damage the linear track 3, and are safe and stable to use.

[0045] The linear rail self-locking device effectively solves the technical problem that the linear rail slider 2 itself cannot self-lock, provides a new solution for equipment safety and equipment assembly convenience, and saves the design and development cost of the equipment self-locking function; it can be directly assembled on the linear rail slider 2 for use, and the position of the slider 2 can be ensured not to move due to factors such as gravity without assistance, thereby reducing the labor cost of assembly.

[0046] This linear rail self-locking device has a simple, compact structure, and uses mature and reliable cylinder technology with extremely low gas consumption. The sliding seat 1 can be mass-produced using casting technology, and the estimated mass production price is less than RMB 30. It can be shipped together with the linear rail assembly, and is easy to assemble. It can also be purchased separately and adapted by yourself, which greatly reduces the procurement cost of equipment accessories. After the device is adapted to the 15 / 20 / 25 specification linear rail, the single clamping force reaches 10KG under 0.5MP air source pressure, and the single clamping force of specifications above 25 reaches 18KG. Within this load range, the slider 2 can be stopped quickly; exceeding this load can effectively decelerate the device and ensure axial rigidity and no scratches on the surface of the slide rail.

Claims

1. A linear rail self-locking device, characterized in that: The invention comprises a sliding seat (1), wherein the sliding seat can be fixedly mounted on the end surface of a slider (2) of the linear rail along at least one end of the sliding direction thereof, the sliding seat can be slidably sleeved on the outer side of a linear rail (3) of the linear rail, and also comprises a left clamping block (4), a right clamping block (5), a left rocker arm (6), a right rocker arm (7) and a driving device, wherein the left clamping block and the right clamping block can be mounted on the sliding seat so as to slide relatively along the width direction of the linear rail, and the relative sliding of the left clamping block and the right clamping block can clamp or release the two side surfaces in the width direction of the linear rail, the left rocker arm and the right rocker arm are respectively rotatably hinged on the sliding seat, one end of the left rocker arm is connected to the left clamping block, and one end of the right rocker arm is connected to the right clamping block, the left rocker arm and the right rocker arm swing around the hinge shaft to drive the left clamping block and the right clamping block to slide linearly along the width direction of the linear rail, and the driving device is mounted on the sliding seat, and the power output end of the driving device drives the left rocker arm and the right rocker arm to rotate synchronously in the opposite direction.

2. The linear rail self-locking device according to claim 1, characterized in that: The sliding seat is an inverted U-shaped structure with the same cross-section as the slider of the linear rail. The left clamping block and the right clamping block are symmetrically distributed on the two side walls of the inverted U-shaped structure of the sliding seat, and the left rocker arm and the right rocker arm are symmetrically distributed on both sides of the sliding seat along the width direction of the linear rail.

3. The linear rail self-locking device according to claim 1 or 2, characterized in that: A piston cavity (8) is formed on the inner side of the sliding seat, and a piston (9) is provided in the piston cavity which can slide along the height direction of the linear track. The outer wall of the piston is in dynamic sealing contact with the inner wall of the piston cavity. A sealed cavity is formed between the piston and one end of the piston cavity. An air inlet and outlet (10) connected to the sealed cavity is provided on the side wall of the one end of the piston cavity. The air inlet and outlet can also be connected to an external air source. A piston rod (11) is fixedly connected to the piston. The piston rod is hingedly connected to the left rocker arm and the right rocker arm. The piston rod drives the left rocker arm and the right rocker arm to rotate synchronously in the opposite direction as the piston reciprocates linearly.

4. The linear rail self-locking device according to claim 3, characterized in that: A clamping spring (12) is also provided in the sliding seat, and the clamping spring provides an elastic retaining force to the piston or piston rod along its sliding direction. The elastic retaining force enables the piston rod to maintain a position in which the left clamping block and the right clamping block clamp the side wall of the linear track without being subjected to other external forces.

5. The linear rail self-locking device according to claim 4, characterized in that: The left rocker arm and the right rocker arm are V-shaped structures facing each other in the opening direction, and the hinge axes of the left rocker arm and the right rocker arm are located at the inflection point of the V-shaped structure. A through hole is provided on the end surface of the other end of the piston cavity for the end of the piston rod to extend out, and the clamping spring is sleeved on the outside of the piston rod, and the two ends of the clamping spring are respectively tightly pressed against the end surface of the piston and the other end of the piston cavity, and the clamping spring provides the piston with an elastic retaining force toward one end of the piston cavity.

6. The linear rail self-locking device according to claim 3, characterized in that: A three-way exhaust valve (13) is provided on the air inlet and outlet on the side wall at one end of the piston chamber, the first channel (P) of the three-way exhaust valve is connected to an external air source, the second channel (A) of the three-way exhaust valve is connected to the air inlet and outlet of the piston chamber, and the third channel (O) of the three-way exhaust valve is connected to the external space, and the first channel and the third channel of the three-way exhaust valve are alternately closed.

7. The linear rail self-locking device according to claim 3, characterized in that: A left clamping seat (14) and a right clamping seat (15) are also provided, and a first elongated guide hole (141) and a second elongated guide hole (151) extending along the width direction of the linear track are respectively provided on the left clamping seat and the right clamping seat, and a left accommodating cavity and a right accommodating cavity extending along the width direction of the linear track are also symmetrically provided in the sliding seat, and the left clamping seat and the right clamping seat can be slidably inserted in the left accommodating cavity and the right accommodating cavity respectively, and a left limiting column (16) and a right limiting column (17) are correspondingly provided on the inner side walls of the left accommodating cavity and the right accommodating cavity, and the left limiting column and the right limiting column can be relatively slidably inserted in the first elongated guide hole and the second elongated guide hole respectively, and the left clamping block and the right clamping block are respectively fixedly installed on the side wall of the left clamping seat and the right clamping seat facing the linear track, and one end of the left rocker arm and the one end of the right rocker arm respectively maintain close contact with the surface of the left clamping seat and the right clamping seat on the side away from the linear track.

8. The linear rail self-locking device according to claim 7, characterized in that: The left clamping seat and the right clamping seat are respectively provided with lug structures on one side wall away from the linear track, and one end of the left rocker arm and one end of the right rocker arm are respectively hingedly connected to the lugs on the left clamping seat and the right clamping seat.

9. The linear rail self-locking device according to claim 7, characterized in that: The sliding seat comprises a sliding body (18), an upper cover (19) and a side cover (20), wherein the sliding seat sleeve is arranged on the outer side of the upper end of the linear track, the upper cover is sealed and fixedly installed on the upper end of the sliding body through a connecting piece (21), and a piston cavity is formed between the sliding body and the upper cover, and the side cover is fixedly installed on one side of the lower section of the sliding body along the extension direction of the linear track through a connecting piece, and a receiving cavity is formed between the sliding body and the side cover.

10. The linear rail self-locking device according to claim 7, characterized in that: The side walls of the left clamping block and the right clamping block close to the linear track match the shapes of the left and right sides of the linear track. The left clamping block and the right clamping block are made of elastic wear-resistant materials integrally formed on the left clamping seat and the right clamping seat and are contoured to the two side surfaces of the linear track.

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