CN215430963U - Headrest rod mounting and fixing device - Google Patents

Abstract

The application relates to a pipe processing and fixing device, in particular to a headrest rod mounting and fixing device, which has the technical scheme that the headrest rod mounting and fixing device comprises a placing seat and a fixing device arranged on the placing seat; the fixing device comprises a fixing rod and a fixing head arranged at one end of the fixing rod, the fixing head is provided with a first fixing hole, and the fixing rod is provided with a second fixing hole which is coaxial with the first fixing hole; when the headrest rod is fixed, the headrest rod is inserted into the second fixing hole and the first fixing hole to realize fixation; the arrangement of the fixing rod and the fixing head and the arrangement of the first fixing hole and the second fixing hole are convenient for fixing the headrest rod, so that the possibility that a worker holds the headrest rod all the time is avoided, the labor intensity of holding is reduced, and the production efficiency is improved.

Description

Headrest rod mounting and fixing device

Technical Field

The application relates to a pipe machining fixing device, in particular to a headrest rod installing and fixing device.

Background

The pipe bender is a processing device for bending and forming pipe workpieces, and is often used for bending and processing headrest rods.

In the related art, chinese patent publication No. CN107081357A discloses a manual hydraulic pipe bender, which comprises a pump body, a pipe bending die and a plunger pump, wherein the plunger pump is arranged at the upper end of the pump body, a handle sleeve is arranged on the plunger pump, the handle sleeve is connected with a handle, a pull piece is arranged at the other end of the handle sleeve and connected with the pump body, the pump body is connected with an oil cylinder base through an oil tank, the oil cylinder base is connected with the pipe bending die, an oil filling port is arranged on the oil tank, an upper wing plate and a lower wing plate are arranged above and below the oil cylinder base, the upper wing plate is fixedly mounted on the oil cylinder base through a wing plate pin, a wheel fixed through a rear wheel fork is connected to the bottom surface of the lower wing plate, a supporting wheel is arranged between the upper wing plate and the lower wing plate, a pulley fixed through a front wheel fork is arranged on the side wall of the pump body, an oil filtering cover is arranged at the bottom of the pump body, and a switch is arranged on the side wall of the pump body.

In view of the above-mentioned related art solutions, the inventors found that: because the headrest rod needs to be bent for many times to complete the processing and forming, when the manual hydraulic pipe bender is used for bending, the headrest rod needs to be manually held in the whole process, so that the headrest rod is driven to move, the labor intensity of workers is very high due to the operation, and the working efficiency is very low.

SUMMERY OF THE UTILITY MODEL

For the convenience of fixing the headrest rod, the labor intensity of hand holding is reduced, the production efficiency is improved, and the application provides a headrest rod mounting and fixing device.

The application provides a headrest pole installation fixing device adopts following technical scheme:

a headrest rod mounting and fixing device comprises a placing seat and a fixing device arranged on the placing seat; the fixing device comprises a fixing rod and a fixing head arranged at one end of the fixing rod, a first fixing hole is formed in the fixing head, and a second fixing hole coaxial with the first fixing hole is formed in the fixing rod.

By adopting the technical scheme, when the headrest rod is fixed, the headrest rod can be fixed by inserting the headrest rod into the second fixing hole and the first fixing hole; the arrangement of the fixing rod and the fixing head and the arrangement of the first fixing hole and the second fixing hole are convenient for fixing the headrest rod, so that the possibility that a worker holds the headrest rod all the time is avoided, the labor intensity of holding is reduced, and the production efficiency is improved.

Preferably, the fixing device further comprises a first driving assembly arranged at one end of the fixing rod far away from the fixing head, wherein the first driving assembly comprises a lead screw arranged on the placing seat and rotatably connected with the placing seat, a lead screw nut arranged on the lead screw and in threaded connection with the lead screw, first guide rails arranged on two sides of the lead screw and fixedly connected with the placing seat, and a first driving piece arranged at one end of the lead screw; the screw nut is connected with the first guide rail in a sliding manner.

By adopting the technical scheme, after the headrest rod is fixed, the first driving piece is started to drive the screw rod to rotate, and under the action of the screw rod and the first guide rail, the screw rod nut drives the fixing assembly and the headrest rod to move along the extension direction of the screw rod, so that the bending operation is realized; the arrangement of the first driving assembly reduces the workload of manually driving the headrest rod to move, so that the labor intensity is reduced, the production efficiency is improved, the moving distance of the headrest rod is conveniently controlled, and the machining precision of the headrest rod is greatly improved.

Preferably, a controller is arranged on the placing seat, a starting pedal is arranged on one side of the placing seat, the first driving piece is electrically connected with the controller, and the starting pedal is electrically connected with the controller.

By adopting the technical scheme, when the first driving part is started, a worker steps on the starting pedal by feet, the starting signal is fed back to the controller, and the controller drives the first driving part to realize starting; the controller and the start pedal that set up have reduced the workman and have made a round trip to walk the work load that starts first driving piece, have improved production efficiency.

Preferably, the end face of the screw nut close to the first guide rail is fixedly connected with a plurality of first guide blocks, and the first guide blocks are in sliding connection with the first guide rail.

Through adopting above-mentioned technical scheme, the sliding connection has not only been realized with first guide rail to the first guide block that sets up lead screw nut, has reduced lead screw nut's wearing and tearing simultaneously, has prolonged life.

Preferably, the fixing rod is rotatably connected with the screw nut; a second driving assembly is arranged above the screw nut; the second driving component comprises a rotating rod, a first gear, a second gear and a second driving piece, wherein the rotating rod is arranged at one end, far away from the fixing head, of the fixing rod and is fixedly connected with the fixing rod, the first gear is arranged at one end, far away from the fixing rod, of the rotating rod and is fixedly connected with the rotating rod, the second gear is arranged at one side of the first gear and is meshed with the first gear, the second driving piece is arranged at one side of the second gear and is fixedly connected with the second gear, and the second driving piece is electrically connected with the controller.

By adopting the technical scheme, the headrest rod which is processed and formed is in a three-dimensional bent shape, so after the first bending treatment, the headrest rod can be bent for multiple times after rotating along the axis of the headrest rod; when the headrest pole needs to rotate, start the second driving piece and drive the second gear and rotate, under the effect of first gear and dwang, dead lever and fixed head will drive the headrest pole and rotate to alright with continuation processing, the setting up of second drive assembly makes the headrest pole realize rotating under the condition that need not take off from fixed subassembly, has shortened the process time of headrest pole greatly, has improved production efficiency.

Preferably, the first gear, the second gear and the rotating rod are provided with a protective cover at the outer side.

Through adopting above-mentioned technical scheme, the setting up of safety cover provides the guard action for the second drive assembly, has reduced the possibility that the damage takes place for the second drive assembly under the effect of external force.

Preferably, the protective cover is in sliding connection with the screw nut; the screw nut is provided with an adjusting component; the adjusting assembly comprises a fixed block fixedly connected to the screw nut, a screw rod penetrating through the fixed block and connected with the protective cover, and second guide rails arranged on two sides of the screw rod and fixedly connected with the upper end face of the screw nut; the screw rod is connected with the fixed block in a rotating mode, the screw rod is connected with the protective cover in a threaded mode, and the protective cover is connected with the second guide rail in a sliding mode.

By adopting the technical scheme, after the headrest rods with different diameters are fixed by the fixing assembly, the screw rod is rotated to drive the protective cover to move along the extending direction of the second guide rail, so that the headrest rods and the fixing assembly are driven to move along the extending direction of the second guide rail; by the design, the headrest rods with different diameters can be bent, and the use diversity is improved.

Preferably, the end face of the protective cover close to the second guide rail is fixedly connected with a plurality of second guide blocks, and the second guide blocks are in sliding connection with the first guide rail.

Through adopting above-mentioned technical scheme, the second guide block that sets up not only makes safety cover and second guide rail realize sliding connection, has reduced the wearing and tearing of safety cover simultaneously, has prolonged life.

Preferably, a hand wheel is arranged on one side, away from the protective cover, of the fixing block, and the hand wheel is coaxial and fixedly connected with the screw rod.

Through adopting above-mentioned technical scheme, the setting of hand wheel has improved the convenience of operation.

Preferably, the fixing head is connected with the fixing rod through a bolt.

Through adopting above-mentioned technical scheme, the fixed head is convenient for change different fixed heads for bolted connection with the dead lever to be convenient for fix the headrest poles of different diameters, improved the variety of use greatly.

In summary, the present application has the following technical effects:

1. when the headrest rod is fixed, the headrest rod is inserted into the second fixing hole and the first fixing hole to realize fixation; the arrangement of the fixing rod and the fixing head and the arrangement of the first fixing hole and the second fixing hole facilitate the fixation of the headrest rod, thereby avoiding the possibility that workers hold the headrest rod all the time, and achieving the effects of reducing the labor intensity of holding and improving the production efficiency;

2. because the machined headrest rod is in a three-dimensional bent shape, after the first bending treatment, the headrest rod can be bent for multiple times after rotating along the axis of the headrest rod; when the headrest rod needs to rotate, the second driving piece is started to drive the second gear to rotate, the fixing rod and the fixing head can drive the headrest rod to rotate under the action of the first gear and the rotating rod, so that the headrest rod can be continuously processed, the headrest rod can rotate under the condition that the headrest rod does not need to be taken down from the fixing assembly due to the arrangement of the second driving assembly, the processing time of the headrest rod is greatly shortened, and the production efficiency is improved;

3. after the headrest rods with different diameters are fixed by the fixing assembly, the screw rod is rotated to drive the protective cover to move along the extending direction of the second guide rail, so that the headrest rods and the fixing assembly are driven to move along the extending direction of the second guide rail; by the design, the headrest rods with different diameters can be bent, and the use diversity is improved.

Drawings

FIG. 1 is a schematic view of the structure of a fixing device in an embodiment of the present application;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is an enlarged schematic view at B of FIG. 1;

FIG. 4 is a partial cross-sectional view highlighting a second drive assembly in an embodiment of the present application;

fig. 5 is a system diagram of a control device in the embodiment of the present application.

In the figure, 1, a placing seat; 2. a fixing device; 3. a fixing assembly; 31. fixing the rod; 32. a fixed head; 4. a first drive assembly; 41. a lead screw; 42. a lead screw nut; 43. a first guide rail; 44. a first driving member; 45. a first guide block; 5. a second drive assembly; 51. rotating the rod; 52. a first gear; 53. a second gear; 54. a second driving member; 55. a protective cover; 6. extruding the bending rod; 61. an arc-shaped placing groove; 7. an adjustment assembly; 71. a fixed block; 72. a screw; 73. a second guide rail; 74. a second guide block; 75. a hand wheel; 8. a control device; 81. a controller; 82. the pedal is actuated.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Referring to fig. 1, the present application provides a headrest rod mounting and fixing device, including a horizontal placing seat 1, a fixing device 2 disposed on the placing seat 1; the fixing device 2 comprises a fixing component 3 for fixing the headrest rod and a first driving component 4 for driving the fixing component 3 to move, and the fixing device 2 is in sliding connection with the placing seat 1.

When the headrest rods are fixedly installed, firstly, the headrest rods are placed on the placing seat 1, then the fixing of the headrest rods is realized by the fixing component 3, and then the headrest rods are driven to correspondingly move by the first driving component 4; the arrangement of the fixing component 3 is convenient for fixing the headrest rods, so that the possibility that workers hold the headrest rods all the time is avoided, and the effects of reducing the labor intensity of holding and improving the production efficiency are achieved; the arrangement of the first driving component 4 is convenient for driving the headrest rod to move, so that the effects of reducing the labor intensity of handheld movement and improving the production efficiency are achieved.

Referring to fig. 2, the fixing assembly 3 includes a fixing rod 31 and a fixing head 32, wherein the fixing rod 31 is horizontally disposed at one side of the driving assembly, the fixing head 32 is disposed at one end of the fixing rod 31 far away from the driving assembly, the fixing head 32 is coaxial with the fixing rod 31, and the fixing head 32 is in bolt connection with the fixing rod 31; the dead lever 31 is kept away from drive assembly's terminal surface and is seted up the first fixed orifices coaxial with dead lever 31, and fixed head 32 is seted up and is run through fixed head 32 and with the coaxial second fixed orifices of fixed head 32, the diameter of first fixed orifices is greater than the diameter of second fixed orifices, first fixed orifices and second fixed orifices are coaxial.

When the headrest rod is fixed, the headrest rod is inserted into the second fixing hole and the first fixing hole to realize fixation; the first fixing hole and the second fixing hole are formed, so that the headrest rod can be fixed conveniently, the headrest rod is prevented from being held by hands all the time in the machining process, the labor intensity is reduced, and the production efficiency is improved; the fixing head 32 and the fixing rod 31 are connected through bolts, so that different fixing heads 32 can be replaced conveniently, headrest rods with different diameters can be fixed conveniently, and the use diversity is greatly improved.

Referring to fig. 1, the first driving assembly 4 includes a screw 41, a screw nut 42, a first guide rail 43 and a first driving member 44, wherein the screw 41 is horizontally disposed on the upper end surface of the first placing base 1, and the extending direction of the screw 41 is parallel to the extending direction of the first placing base 1, and the screw 41 is rotatably connected to the first placing base 1; the screw nut 42 is horizontally arranged on the screw 41 and is in threaded connection with the screw 41; the two first guide rails 43 are respectively arranged at two sides of the screw rod 41, the first guide rails 43 are horizontally and fixedly connected to the upper end surface of the first placing seat 1, the extending direction of the first guide rails is parallel to the extending direction of the screw rod 41, and the screw rod nut 42 is in sliding connection with the first guide rails 43; the first driving member 44 is disposed at one end of the lead screw 41, and an output shaft thereof is fixedly connected to the lead screw 41, and the first driving member 44 may adopt a driving motor, a hydraulic motor, and the like, and in the embodiment of the present application, the hydraulic motor is adopted as the first driving member 44.

After the headrest rod is fixed, the first driving part 44 is started to drive the screw rod 41 to rotate, and under the action of the screw rod 41 and the first guide rail 43, the screw rod nut 42 drives the fixing component 3 and the headrest rod to move along the extending direction of the screw rod 41, so that the bending operation is realized; the arrangement of the first driving assembly 4 reduces the workload of manually driving the headrest rods to move, thereby not only reducing the labor intensity and improving the production efficiency, but also being convenient for controlling the moving distance of the headrest rods, and further greatly improving the processing precision of the headrest rods; the first guide rail 43 is provided to perform guiding and limiting functions, so that the lead screw nut 42 can move along the extending direction of the lead screw 41.

Referring to fig. 3, in order to enable the screw nut 42 to be slidably connected with the first guide rail 43, the end surface of the screw nut 42 close to the first guide rail 43 is fixedly connected with a plurality of first guide blocks 45, the number of the first guide blocks 45 is four, the first guide blocks 45 are arranged in pairs and opposite to each other, and a first sliding groove for embedding the first guide rail 43 is formed in the end surface of the first guide block 45 close to the first guide rail 43; the first guide block 45 is arranged, so that the screw nut 42 is in sliding connection with the first guide rail 43, the abrasion of the screw nut 42 is reduced, and the service life is prolonged; the first sliding groove reduces the possibility of the first guide block 45 being separated from the first guide rail 43, and ensures the normal operation of the screw nut 42.

Referring to fig. 1, 2 and 4, in order to shorten the processing time of the headrest rods and thus improve the production efficiency, the fixing rod 31 is rotatably connected with the screw nut 42; specifically, the upper end surface of the lead screw nut 42 is provided with a second driving assembly 5, the second driving assembly 5 comprises a rotating rod 51, a first gear 52, a second gear 53 and a second driving member 54, wherein, the rotating rod 51 is arranged at one end of the fixed rod 31 far away from the fixed head 32, the rotating rod 51 is coaxial with the fixed rod 31, and is fixedly connected with the fixing rod 31, the first gear 52 is arranged at one end of the rotating rod 51 far away from the fixing rod 31, the first gear 52 is coaxial with the rotating rod 51, and is fixedly coupled to the outer circumferential surface of the rotating lever 51, the second gear 53 is disposed above the first gear 52, and is engaged with the first gear 52, the second driving member 54 is provided on a side of the second gear 53 adjacent to the rotating lever 51, and the output shaft thereof is coaxially and fixedly connected with the second gear 53, the second driving member 54 may adopt a driving motor, a hydraulic motor, etc., in the embodiment of the present application, the second driving member 54 adopts a hydraulic motor.

When the headrest rod is bent, firstly, the fixing component 3 is utilized for fixing, and then the first driving component 4 is utilized for driving the headrest rod to move, so that the first bending is carried out; when the headrest pole rotates, start second driving piece 54 and drive second gear 53 and rotate, under the effect of first gear 52 and dwang 51, dead lever 31 and fixed head 32 will drive the headrest pole and rotate to alright with continuation processing, the setting up of second drive assembly 5 makes the headrest pole realize rotating under the condition that need not take off from fixed subassembly 3, has shortened the process time of headrest pole greatly, has improved production efficiency.

Referring to fig. 4, in order to reduce the possibility of the second driving assembly 5 being damaged by external force, a protective cover 55 is disposed on the outer sides of the first gear 52, the second gear 53 and the rotating rod 51, and the rotating rod 51 is rotatably connected to the protective cover 55; the provision of the protective cover 55 provides a protective effect to the second drive assembly 5, reducing the likelihood of damage to the second drive assembly 5 under external forces.

Referring to fig. 1, 2 and 4, a vertical extrusion bending rod 6 is arranged at one end of the fixing head 32 far away from the fixing rod 31, and an arc-shaped placing groove 61 is formed in the side surface of the extrusion bending rod 6; before the headrest rods are bent, the headrest rods need to be placed in the arc-shaped placing grooves 61 through the fixing assemblies 3 and the first driving assemblies 4, and then corresponding bending processing is achieved.

Referring to fig. 1 and 3, in order to place headrest rods with different diameters in the arc-shaped placing groove 61, the protective cover 55 is in sliding connection with the lead screw nut 42; specifically, the screw nut 42 is provided with the adjusting assembly 7, the adjusting assembly 7 comprises a fixed block 71, a screw 72 and a second guide rail 73, wherein the fixed block 71 is vertically and fixedly connected to the side surface of the screw nut 42, the screw 72 is horizontally arranged, penetrates through the fixed block 71 and is in threaded connection with the protective cover 55, and the screw 72 is in rotational connection with the fixed block 71; the two second guide rails 73 are respectively arranged on two sides of the screw 72, the second guide rails 73 are horizontally and fixedly connected to the upper end surface of the screw nut 42, the extending direction of the second guide rails 73 is perpendicular to the extending direction of the screw 41, and the protective cover 55 is in sliding connection with the second guide rails 73.

After the headrest rods with different diameters are fixed by the fixing assembly 3, the screw 72 is rotated to drive the protective cover 55 to move along the extending direction of the second guide rail 73, so that the headrest rods and the fixing assembly 3 are driven to move along the extending direction of the second guide rail 73; such design makes the headrest poles homoenergetic of different diameters place in the arc standing groove 61 that extrusion bending pole 6 was seted up, and then makes the headrest poles homoenergetic of different diameters realize bending and handle, has improved the variety of use.

Referring to fig. 3 and 4, in order to enable the protective cover 55 to be slidably connected with the second guide rail 73, a plurality of second guide blocks 74 are fixedly connected to an end surface of the protective cover 55 close to the second guide rail 73, four second guide blocks 74 are arranged, and two of the second guide blocks 74 are arranged oppositely, and a second sliding groove for the second guide rail 73 to be embedded in is formed in the end surface of the second guide block 74 close to the second guide rail 73; the second guide block 74 is arranged to realize sliding connection between the protective cover 55 and the second guide rail 73, reduce abrasion of the protective cover 55 and prolong service life; the opened second sliding groove reduces the possibility that the second guide block 74 is separated from the second guide rail 73, and ensures the normal operation of the protective cover 55.

Referring to fig. 1, in order to facilitate driving the first screw 72 to rotate, a hand wheel 75 is disposed on a side of the first fixing block 71 away from the protective cover 55, and the hand wheel 75 is coaxial and fixedly connected with the first screw 72.

Referring to fig. 1 and 5, a control device 8 is disposed on the placing seat 1, the control device 8 includes a controller 81 and a starting pedal 82, the controller 81 may adopt a single chip microcomputer, a PLC, etc., in this embodiment, the controller 81 adopts a PLC, the starting pedal 82 is disposed below the placing seat 1 and is fixedly connected to the ground, the controller 81 is electrically connected to the starting pedal 82, and the first driving member 44 and the second driving member 54 are electrically connected to the controller 81.

When the headrest pole is installed and fixed, the staff steps on the starting pedal 82 by feet, the starting signal is fed back to the controller 81, the controller 81 drives the first driving part 44 and the second driving part 54 to realize starting, and the specific operation process is as follows: firstly, a worker inserts a headrest rod into a first fixing hole and a second fixing hole, then treads a starting pedal 82 with a foot, a first driving piece 44 drives the headrest rod to move on the placing seat 1 along the extending direction of the screw rod 41, after the first bending treatment, the worker treads the starting pedal 82 with the foot again, a second driving piece 54 drives the headrest rod to rotate, then the first driving piece 44 drives the headrest rod to continuously drive the headrest rod to move along the extending direction of the screw rod 41, and finally the processing and forming of the headrest rod are finished; the controller 81 and the start pedal 82 are arranged to realize automation of operation, reduce the workload of workers walking back and forth to start the first driving part 44 and the second driving part 54, and improve the production efficiency.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (10)

1. The utility model provides a headrest pole installation fixing device which characterized in that: comprises a placing seat (1) and a fixing device (2) arranged on the placing seat (1); the fixing device (2) comprises a fixing rod (31) and a fixing head (32) arranged at one end of the fixing rod (31), a first fixing hole is formed in the fixing head (32), and a second fixing hole coaxial with the first fixing hole is formed in the fixing rod (31).

2. A headrest pole mounting and fixing device as claimed in claim 1, wherein: the fixing device (2) further comprises a first driving assembly (4) arranged at one end, far away from the fixing head (32), of the fixing rod (31), wherein the first driving assembly (4) comprises a lead screw (41) which is arranged on the placing seat (1) and is rotatably connected with the placing seat (1), a lead screw nut (42) which is arranged on the lead screw (41) and is in threaded connection with the lead screw (41), first guide rails (43) which are arranged on two sides of the lead screw (41) and are fixedly connected with the placing seat (1), and a first driving piece (44) which is arranged at one end of the lead screw (41); the screw nut (42) is connected with the first guide rail (43) in a sliding way.

3. A headrest rod mounting and fixing device as claimed in claim 2, wherein: the placing seat (1) is provided with a controller (81), one side of the placing seat (1) is provided with a starting pedal (82), the first driving piece (44) is electrically connected with the controller (81), and the starting pedal (82) is electrically connected with the controller (81).

4. A headrest rod mounting and fixing device as claimed in claim 2, wherein: the end face, close to the first guide rail (43), of the screw nut (42) is fixedly connected with a plurality of first guide blocks (45), and the first guide blocks (45) are in sliding connection with the first guide rail (43).

5. A headrest rod mounting and fixing device as claimed in claim 3, wherein: the fixing rod (31) is rotationally connected with the screw nut (42); a second driving assembly (5) is arranged above the screw nut (42); the second driving assembly (5) comprises a rotating rod (51) which is arranged at one end, far away from the fixing head (32), of the fixing rod (31) and is fixedly connected with the fixing rod (31), a first gear (52) which is arranged at one end, far away from the fixing rod (31), of the rotating rod (51) and is fixedly connected with the rotating rod (51), a second gear (53) which is arranged on one side of the first gear (52) and is meshed with the first gear (52), and a second driving piece (54) which is arranged on one side of the second gear (53) and is fixedly connected with the second gear (53), wherein the second driving piece (54) is electrically connected with the controller (81).

6. A headrest pole mounting and fixing device as claimed in claim 5, wherein: a protective cover (55) is arranged outside the first gear (52), the second gear (53) and the rotating rod (51).

7. A headrest rod mounting and fixing device as claimed in claim 6, wherein: the protective cover (55) is in sliding connection with the screw nut (42); the screw nut (42) is provided with an adjusting component (7); the adjusting assembly (7) comprises a fixed block (71) fixedly connected to the screw nut (42), a screw rod (72) penetrating through the fixed block (71) and connected with the protective cover (55), and second guide rails (73) arranged on two sides of the screw rod (72) and fixedly connected with the upper end face of the screw nut (42); the screw rod (72) is rotatably connected with the fixed block (71), the screw rod (72) is in threaded connection with the protective cover (55), and the protective cover (55) is in sliding connection with the second guide rail (73).

8. A headrest rod mounting and fixing device as claimed in claim 7, wherein: the end face, close to the second guide rail (73), of the protective cover (55) is fixedly connected with a plurality of second guide blocks (74), and the second guide blocks (74) are in sliding connection with the first guide rail (43).

9. A headrest rod mounting and fixing device as claimed in claim 7, wherein: a hand wheel (75) is arranged on one side, away from the protective cover (55), of the fixing block (71), and the hand wheel (75) is coaxial and fixedly connected with the screw rod (72).

10. A headrest pole mounting and fixing device as claimed in claim 1, wherein: the fixed head (32) is connected with the fixed rod (31) through a bolt.

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