A mechanical folding electric hand truck

Abstract

The present invention discloses a mechanically foldable hand-held electric transport vehicle in the technical field of transport vehicles, comprising: a vehicle body, on the bottom of which rollers with adjustable wheelbase are slidably mounted and can be folded in the height direction; motors are mounted on the sides of the rollers to provide power thereto; a transport track is arranged in a closable ring shape; the rollers can drive the vehicle body to move cyclically on the transport track; the transport track can adjust the wheelbase of the rollers; when the wheelbase of the rollers is reduced, the vehicle body is folded; when the wheelbase of the rollers is increased, the vehicle body is extended; the present invention can greatly improve the transportation efficiency of goods.

Description

Technical Field

[0001] The present invention relates to the technical field of transport vehicles, in particular to a mechanically foldable hand-held electric transport vehicle. Background Art

[0002] Electric transport vehicles play an important role in the transportation of materials. When they are combined with tracks, they can achieve fixed-track transportation tasks.

[0003] However, due to the presence of the truck bed, in order to enable multiple vehicles to work on the track at the same time, the track often needs to be designed as a circular track on the horizontal plane or a circular track on the vertical plane; the circular track on the horizontal plane occupies a large area and the laying cost and difficulty will be significantly increased, especially for long-distance transportation, such as when the track is used for fruit picking and transportation in orchards and material transportation in factories; while the circular track on the vertical plane needs to occupy a higher space, the upper track is high above the ground, and the truck has poor stability during driving.

[0004] Based on this, the present invention designs a mechanically foldable electric hand truck to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a mechanically foldable electric hand truck to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a mechanically foldable hand-held electric transport vehicle, comprising: a vehicle body, on the bottom of which rollers with adjustable wheelbase are slidably mounted and can be folded in the height direction; motors are mounted on the sides of the rollers to provide power for them; a transport track is arranged in a closable ring shape; the rollers can drive the vehicle body to move in a circular motion on the transport track; the transport track can adjust the wheelbase of the rollers; when the wheelbase of the rollers is reduced, the vehicle body folds; when the wheelbase of the rollers is increased, the vehicle body extends.

[0007] As a further solution of the present invention, the vehicle body includes: a base plate for carrying cargo; four folding baffles arranged in a rectangular shape and all installed on the top of the base plate; a first driving member arranged at the bottom of the base plate and used to drive the folding baffles to fold or extend when the wheelbase changes.

[0008] As a further solution of the present invention, the folding baffle includes a baffle rod and a scissors frame; the bottom end of the scissors frame is movably connected to the bottom plate; and the top end of the scissors frame is movably connected to the baffle rod.

[0009] As a further solution of the present invention, the first driving member includes: four telescopic cylinders, one end of which is respectively fixed to the top of the four folding baffles, and the other end is fixedly connected to the base plate; an air box, fixedly installed on the bottom of the base plate and connected to the four telescopic cylinders through four air pipes; a piston, sealed and slidably installed on the inside of the air box; a first connecting rod, one end of which is hinged to the roller, and the other end is hinged to the piston.

[0010] As a further solution of the present invention, the transport track includes a first guide rail, a second guide rail and a connecting guide rail; the first guide rail is set to a shape that is wide in the middle and narrow at both ends; the second guide rail is set below the first guide rail, and the width of the second guide rail is equal to the width of the first guide rail at both ends; the connecting guide rail is set at both ends of the first guide rail and is used to smoothly connect the first guide rail and the second guide rail, so that the vehicle body can circulate between the first guide rail and the second guide rail.

[0011] As a further solution of the present invention, the rollers are arranged in two groups distributed on the left and right, and the first connecting rod is hinged to the left roller; a conducting pipe is fixedly connected to the outer wall of the air box, and the air pipe is fixedly connected to the conducting pipe, and the conducting pipe is slidably connected in the vertical direction with a first block capable of covering the air pipe; a first spring for its reset is fixedly connected to the first block; a one-way valve is fixedly installed in the first block; when the first block is located on the side of the air pipe, the air circulation direction can only be from the air box into the air pipe; a traction rope is fixedly connected to the first block, and the traction rope passes through the conducting pipe at one end away from the first block and is fixedly connected to the first slider, and the first slider is located on the inner side of the roller on the right.

[0012] As a further solution of the present invention, a second stopper is slidably installed in the air box, and the second stopper is used to control the connection between the air pipe and the air box; when the vehicle body carries cargo, the second stopper can block the air pipe connected to the telescopic cylinder on the left and right sides.

[0013] As a further solution of the present invention, a detection plate is slidably installed on the top of the base plate in the vertical direction, and a pressure spring is arranged between the detection plate and the base plate; a pressure rod is fixedly connected to the bottom of the detection plate, the bottom end of the pressure rod passes through the base plate and is connected to a second connecting rod, and the second connecting rod is hinged to the second stop block at one end away from the pressure rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By arranging the vehicle body, rollers and transport tracks, the present invention enables the vehicle body to circulate on the transport tracks, thereby greatly improving the transport efficiency of goods. When the rollers move along the transport tracks, the rollers can automatically adjust the wheelbase under the action of the transport tracks, and the vehicle body can automatically fold or stretch during operation. The height occupied by the vehicle body when moving from the unloading end to the upper loading end in the folded state can be greatly reduced, which can greatly reduce the space occupied by the transport tracks and at the same time lower the center of gravity of the vehicle body. The vehicle body can move to the loading end faster and more stably, and the present invention can be applied to long-distance transportation of goods in most cases. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the vehicle body structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the folding baffle structure of the present invention;

[0019] Figure 4 It is a schematic cross-sectional view of the vehicle body structure of the present invention (bottom view);

[0020] Figure 5 This is a schematic diagram of the transport track structure of the present invention (front view);

[0021] Figure 6 for Figure 5 A partial enlarged view of the middle part;

[0022] Figure 7 for Figure 5 A partial enlarged view of point B in the middle;

[0023] Figure 8 Schematic diagram of the transport track structure of the present invention (top view);

[0024] Figure 9 This is a cross-sectional diagram of the air box and its internal structure;

[0025] Figure 10 This is a cross-sectional schematic diagram of the conducting tube and its internal structure of the present invention (left side view);

[0026] Figure 11 This is a cross-sectional view of the conductive tube and the first stopper structure of the present invention (front view)

[0027] Figure 12 It is a cross-sectional schematic diagram of the detection board and related structures of the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0029] 1-car body, 2-roller, 3-transport track, 4-bottom plate, 5-folding baffle, 6-baffle rod, 7-scissor frame, 8-telescopic cylinder, 9-air box, 10-air pipe, 11-piston, 12-first connecting rod, 13-first guide rail, 14-second guide rail, 15-connecting guide rail, 16-conducting pipe, 17-first stopper, 18-one-way valve, 19-traction rope, 20-first slider, 21-second stopper, 22-detection plate, 23-pressure spring, 24-pressure rod, 25-second connecting rod. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-12 The present invention provides a technical solution: a mechanically foldable hand-held electric transport vehicle, comprising a vehicle body 1 and a transport track 3; rollers 2 with adjustable wheelbases are slidably mounted on the bottom of the vehicle body 1 and can be folded in the height direction; motors are mounted on the sides of the rollers 2 to provide power thereto; the transport track 3 is configured in a closable ring shape; the rollers 2 can drive the vehicle body 1 to circulate on the transport track 3; the transport track 3 can adjust the wheelbase of the rollers 2; when the wheelbase of the rollers 2 is reduced, the vehicle body 1 is folded; when the wheelbase of the rollers 2 is increased, the vehicle body 1 is extended.

[0032] like Figure 1When the load is loaded, the load carrier 1 is moved to the upper position, and the load carrier 1 is moved to the lower position, so that the load carrier 1 can be loaded to the upper position, and the load carrier 1 can be loaded to the lower position, so that the load carrier 1 can be loaded to the lower position, and the load carrier 1 can be loaded to the lower position, so that the load carrier 1 can be loaded to the lower position, and the load carrier 1 can be loaded to the lower position, so that the load carrier 1 can be loaded to the lower position, The height of the vehicle body 1 is greatly reduced, so the height difference between the upper and lower layers of the transport track 3 can be small, the height of the upper layer of the transport track 3 and the ground can be controlled within a reasonable range, and the fully loaded vehicle body 1 can be stably moved to the unloading end on the upper layer of the transport track 3; the present invention can greatly improve the transportation efficiency of goods by arranging the vehicle body 1, the rollers 2 and the transport track 3; when the rollers 2 move along the transport track 3, under the action of the transport track 3, the rollers 2 can automatically adjust the wheelbase, and the vehicle body 1 can automatically fold or stretch during operation. The height occupied by the vehicle body 1 when moving from the unloading end to the upper loading end in the folded state can be greatly reduced, which can greatly reduce the space occupied by the transport track 3 and at the same time lower the center of gravity of the vehicle body 1. The vehicle body 1 can move to the loading end faster and more stably, and the present invention can be applied to long-distance transportation of goods in most cases.

[0033] Specifically, such as Figure 2 As shown, the vehicle body 1 includes a base plate 4, a folding baffle 5 and a first driving member; the base plate 4 is used to carry goods; the folding baffles 5 are arranged in four rectangular shapes and are all installed on the top of the base plate 4; the first driving member is arranged at the bottom of the base plate 4 and is used to drive the folding baffles 5 to fold or extend when the wheelbase of the roller 2 changes.

[0034] When the wheelbase of the roller 2 becomes smaller, the first driving member can drive the folding baffle 5 to retract, and the height of the folding baffle 5 is reduced; when the wheelbase of the roller 2 becomes larger, the first driving member can drive the folding baffle 5 to extend, and the height of the folding baffle 5 is increased.

[0035] Specifically, such as Figure 2 and Figure 3 As shown, the folding baffle 5 includes a baffle rod 6 and a scissor frame 7; the bottom end of the scissor frame 7 is movably connected to the bottom plate 4; and the top end of the scissor frame 7 is movably connected to the baffle rod 6.

[0036] When the folding baffle 5 is in the extended state, the baffle rod 6 cooperates with the scissor frame 7 to protect the goods. The contraction and extension height of the scissor frame 7 is much greater than that of the telescopic baffle, and the folding baffle 5 can be contracted and extended to the maximum extent.

[0037] Specifically, such as Figure 2 and Figure 4 As shown, the first driving member includes four telescopic cylinders 8, an air box 9, a piston 11 and a first connecting rod 12; one end of the four telescopic cylinders 8 is respectively fixed to the top of the four folding baffles 5, and the other end is fixedly connected to the base plate 4; the air box 9 is fixedly installed at the bottom of the base plate 4 and is connected to the four telescopic cylinders 8 through four air pipes 10; the piston 11 is sealed and slidably installed on the inner side of the air box 9; one end of the first connecting rod 12 is hinged to the roller 2, and the other end is hinged to the piston 11.

[0038] When the roller 2 moves toward the middle position of the vehicle body 1 under the action of the transport track 3 (the wheelbase of the roller 2 decreases), the roller 2 will drive the piston 11 to move rightward in the air box 9 through the first connecting rod 12, the space on the left side of the piston 11 in the air box 9 increases, and the air pressure decreases; since the telescopic cylinder 8 is connected to the air box 9 through the air pipe 10, and the connection point is located on the left side of the piston 11, the telescopic cylinder 8 will contract downward under the action of the air pressure difference, and the telescopic cylinder 8 will drive the folding baffle 5 to contract downward; when the roller 2 moves from the inside to the outside under the action of the transport track 3 (the wheelbase of the roller 2 increases), the piston 11 will move leftward in the air box 9. At this time, the piston 11 will push the air in the air box 9 into the telescopic cylinder 8 through the air pipe 10, and the telescopic cylinder 8 can drive the folding baffle 5 to extend.

[0039] Specifically, such as Figure 5-Figure 8 As shown, the transport track 3 includes a first guide rail 13, a second guide rail 14 and a connecting guide rail 15; the first guide rail 13 is set to be wide in the middle and narrow at both ends; the second guide rail 14 is set below the first guide rail 13, and the width of the second guide rail 14 is equal to the width of the two ends of the first guide rail 13; the connecting guide rail 15 is set at both ends of the first guide rail 13 and is used to smoothly connect the first guide rail 13 and the second guide rail 14, so that the vehicle body 1 can circulate between the first guide rail 13 and the second guide rail 14.

[0040] When the vehicle body 1 is loaded with cargo and moves toward the unloading end (the unloading end is the right end of the first guide rail 13), the roller 2 will move on the first guide rail 13; the right end of the first guide rail 13 is configured to be narrower than wide. When the roller 2 approaches the unloading end, the first guide rail 13 will drive the roller 2 to move toward the middle position of the vehicle body 1, and the wheelbase of the roller 2 will decrease. Figure 7As shown, the connecting guide rail 15 at the right end of the first guide rail 13 can be in a horizontal state under the action of an elastic member such as a spring when not in operation, and the unloading end is located on the left side of the connecting guide rail 15 on the right side; after the staff has unloaded the goods on the vehicle body 1, the roller 2 can continue to move to the right under the action of the motor, and when the roller 2 drives the vehicle body 1 to move to the connecting guide rail 15 on the right side, the gravity of the vehicle body 1 will drive the connecting guide rail 15 to flip downward, and then the vehicle body 1 can move from the connecting guide rail 15 on the right side to the second guide rail 14, and then the roller 2 can move to the upper cargo end along the second guide rail 14 under the drive of the motor; Figure 6 As shown, the left end of the second guide rail 14 is set to an inclined shape, and the roller 2 can move along the inclined surface of the left end of the second guide rail 14 to a height flush with the first guide rail 13; then the roller 2 can move to the right through the connecting guide rail 15 on the left and drive the vehicle body 1 to move to the loading position at the left end of the first guide rail 13; after the cargo is loaded, when the roller 2 moves to the right through the left end of the first guide rail 13, the first guide rail 13 will drive the wheelbase of the roller 2 from small to large, and the folding baffle 5 will extend to protect the cargo.

[0041] Specifically, such as Figure 4 、 Figure 9 and Figure 10 As shown, the rollers 2 are arranged in two groups distributed on the left and right, and the first connecting rod 12 is hinged to the left roller 2; a conducting pipe 16 is fixedly connected to the outer wall of the air box 9, and the air pipe 10 is fixedly connected to the conducting pipe 16, and the conducting pipe 16 is slidably connected in the vertical direction with a first block 17 that can block the air pipe 10; a first spring for its reset is fixedly connected to the first block 17; a one-way valve 18 is fixedly installed in the first block 17; when the first block 17 is located on the side of the air pipe 10, the air circulation direction can only be from the air box 9 to the air pipe 10; a traction rope 19 is fixedly connected to the first block 17, and the end of the traction rope 19 away from the first block 17 passes through the conducting pipe 16 and is fixedly connected to a first slider 20, and the first slider 20 is located on the inner side of the roller 2 on the right.

[0042] When the fully loaded vehicle body 1 moves toward the unloading end, the wheelbase of the roller 2 on the right side of the vehicle body 1 will first become smaller. When the right roller 2 moves toward the middle of the vehicle body 1, it will drive the first slider 20 to move synchronously. The first slider 20 will drive the first stopper 17 to move downward in the guide tube 16 through the traction rope 19. At this time, the folding effect of the first stopper 17 on the air tube 10 disappears; when the left roller 2 passes the right end of the first guide rail 13, the air in the telescopic cylinder 8 can enter the air box 9 through the air tube 10, and the telescopic baffle 5 will retract. When the vehicle body 1 is at the loading end, after loading the goods, the vehicle body 1 moves from left to right, and the wheelbase of the roller on the right side will first become larger. At this time, the first stopper 17 will move upward back to its initial position (i.e. Figure 10The state shown); at this time, the first stopper 17 blocks the air pipe 10; due to the setting of the one-way valve 18, when the wheelbase of the left roller 2 increases, the air in the air box 9 can still enter the telescopic cylinder 8 through the one-way valve 18, and the telescopic cylinder 8 can be extended; when the vehicle body 1 is transported over long distances from left to right, the gas in the telescopic cylinder 8 cannot enter the air box 9, which can ensure that even if the vehicle body 1 shakes during long-distance transportation, the foldable baffle 5 can still stably maintain the extended state, and the foldable baffle 5 can stably protect the goods.

[0043] Specifically, such as Figure 9 、 Figure 11 as well as Figure 12 As shown, a second stopper 21 is slidably installed in the air box 9, and the second stopper 21 is used to control the connection between the air pipe 10 and the air box 9; when the vehicle body 1 carries cargo, the second stopper 21 can block the air pipe 10 connected to the telescopic cylinder 8 on the left and right sides; a detection plate 22 is slidably installed on the top of the base plate 4 in the vertical direction, and a pressure spring 23 is provided between the detection plate 22 and the base plate 4; a pressure rod 24 is fixedly connected to the bottom of the detection plate 22, and the bottom end of the pressure rod 24 passes through the base plate 4 and is connected to a second connecting rod 25, and the second connecting rod 25 is hinged to the second stopper 21 at one end away from the pressure rod 24.

[0044] The detection plate 22 can cooperate with the pressure spring 23 to detect the weight of the cargo loaded on the vehicle body 1; Figure 9 and Figure 11When the load is fully loaded, the second stopper 21 blocks the air pipe 10 connected to the left and right telescopic cylinders 8. When the load is fully loaded, when the vehicle body 1 moves to the right, the wheelbase of the roller 2 becomes smaller, and the air pressure in the air box 9 decreases. At this time, only the air pipe 10 connected to the front and rear telescopic cylinders 8 is connected to the air box, and the front and rear telescopic cylinders 8 first drive the front and rear telescopic baffles 5 to retract downward, while the left and right telescopic baffles 5 are temporarily still in the extended state. The front and rear telescopic baffles 5 can be retracted and folded to facilitate the unloading of the staff. The left and right telescopic baffles 5 can play a protective role for the unloaded goods in the extended state, which can better protect the goods from damage. After all the goods are unloaded, the inspection plate 22 will move upward under the action of the pressure spring 23, and the inspection plate 22 will drive the second stopper 21 to move to the right through the pressure rod 24 and the second connecting rod 25 to block the air pipe 10 connected to the front and rear telescopic cylinders 8. It should be noted that When the wheelbase of the left roller 2 is reduced, the moving distance of the piston 11 in the air box 9 is a fixed value. Therefore, before unloading is completed, the air pressure in the air box 9 is always negative. After unloading is completed, the first stop 21 cancels the blocking of the air pipe 10 connected to the left and right telescopic cylinders 8, and the left and right telescopic cylinders 8 will quickly retract under the action of air pressure; on the contrary, when loading goods, the first stop 21 blocks the air pipe 10 connected to the front and rear telescopic cylinders 8, and the telescopic baffles 5 on the left and right sides are extended first, and the front and rear telescopic baffles 5 are still in a retracted state, which can facilitate the staff to load goods. In the process of loading goods, the weight of the goods will drive the detection plate 22 to move downward, and the detection plate 22 will drive the first stop 21 to move to the left through the pressure rod 24 and the second connecting rod 25, until the first stop 21 moves to the air pipe 10 connected to the front and rear telescopic cylinders 8, and the front and rear telescopic baffles 5 immediately extend, which can remind the staff that the vehicle body 1 is fully loaded at this time.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mechanically foldable electric hand truck, characterized by: include: The vehicle body (1) has rollers (2) with adjustable wheelbases slidably mounted on the bottom and can be folded in the height direction; a motor for providing power to the rollers (2) is mounted on the sides; The rollers (2) are arranged in two groups distributed on the left and right; The vehicle body (1) comprises: A bottom plate (4) for carrying goods; Folding baffles (5), arranged in a rectangular pattern and four in number and mounted on the top of the bottom plate (4); A first driving member is provided at the bottom of the base plate (4) and is used to drive the folding baffle (5) to fold or extend when the wheelbase changes. The transport track (3) is configured as a closable ring; the roller (2) can drive the vehicle body (1) to move cyclically on the transport track (3); the transport track (3) can adjust the wheelbase of the left roller (2) and the right roller (2); when the wheelbase of the roller (2) decreases, the folding baffle (5) folds; when the wheelbase of the roller (2) increases, the folding baffle (5) extends.

2. The mechanically foldable electric hand truck according to claim 1, characterized in that: The folding baffle (5) comprises a baffle rod (6) and a scissor frame (7); the bottom end of the scissor frame (7) is movably connected to the bottom plate (4); and the top end of the scissor frame (7) is movably connected to the baffle rod (6).

3. The mechanically foldable electric hand truck according to claim 2, characterized in that: The first driving member includes: Four telescopic cylinders (8), one end of which is fixedly connected to the top of the four folding baffles (5) respectively, and the other end of which is fixedly connected to the bottom plate (4); An air box (9) is fixedly mounted on the bottom of the base plate (4) and is connected to the four telescopic cylinders (8) through four air pipes (10); A piston (11) is sealingly and slidably mounted on the inner side of the air box (9); The first connecting rod (12) has one end hinged to the roller (2) and the other end hinged to the piston (11).

4. The mechanically foldable electric hand truck according to claim 3, characterized in that: The transport track (3) comprises a first guide rail (13), a second guide rail (14) and a connecting guide rail (15); the first guide rail (13) is configured to be wide in the middle and narrow at both ends; the second guide rail (14) is disposed below the first guide rail (13), and the width of the second guide rail (14) is equal to the width of both ends of the first guide rail (13); the connecting guide rail (15) is disposed at both ends of the first guide rail (13) and is used to smoothly connect the first guide rail (13) and the second guide rail (14), so that the vehicle body (1) can cyclically move between the first guide rail (13) and the second guide rail (14).

5. The mechanically foldable electric hand truck according to claim 3, characterized in that: The first connecting rod (12) is hinged to the left roller (2); a conducting tube (16) is fixedly connected to the outer wall of the air box (9), the air pipe (10) is fixedly connected to the conducting tube (16), and the conducting tube (16) is slidably connected to a first block (17) capable of blocking the air pipe (10) in the vertical direction; a first spring for resetting the first block (17) is fixedly connected to the first block (17); a one-way valve (18) is fixedly installed in the first block (17); when the first block (17) is located on the side of the air pipe (10), the air flow direction can only be from the air box (9) into the air pipe (10); a traction rope (19) is fixedly connected to the first block (17), and the end of the traction rope (19) away from the first block (17) passes through the conducting tube (16) and is fixedly connected to a first slider (20), and the first slider (20) is located on the inner side of the roller (2) on the right.

6. The mechanically foldable electric hand truck according to claim 5, characterized in that: A second stopper (21) is slidably mounted in the air box (9), and the second stopper (21) is used to control the communication between the air pipe (10) and the air box (9); when the vehicle body (1) carries cargo, the second stopper (21) can block the air pipe (10) connected to the telescopic cylinders (8) on the left and right sides.

7. The mechanically foldable electric hand truck according to claim 6, characterized in that: A detection plate (22) is mounted on the top of the bottom plate (4) in a sliding manner in the vertical direction, and a pressure spring (23) is provided between the detection plate (22) and the bottom plate (4); a pressure rod (24) is fixedly connected to the bottom of the detection plate (22), the bottom end of the pressure rod (24) passes through the bottom plate (4) and is connected to a second connecting rod (25), and the second connecting rod (25) is hinged to the second stopper (21) at one end away from the pressure rod (24).

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