Stable micro-bubble shower head

Abstract

The invention relates to the technical field of shower heads, in particular to a stable micro-bubble shower head which comprises a liquid channel, a first reducer pipe, a mixing pipe, a second reducer pipe, a shower head nozzle, an air suction device, a mixing device, a driving device and a bubble adjusting device, the air suction device is communicated with the mixing pipe through a pipeline, and the mixing device is arranged on the mixing pipe and driven by water flow to rotate. A driving device for limiting the mixing device is arranged on one side of the mixing device, a bubble adjusting device capable of cutting bubbles is arranged on the side, away from the mixing device, of the driving device, and the bubble adjusting device comprises three connecting rings, a cutting ring, a cutting block, a clamping block, a reciprocating lead screw, a cylindrical block and a driving block. The two connecting rings close to the shower nozzle are movably arranged in a slide way on the inner wall surface of the mixing pipe; the connecting ring far away from the shower nozzle is fixedly arranged on the inner wall surface of the mixing pipe; the contact amount of air and water can be controlled, namely the generation amount of bubbles is controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of shower heads, and in particular to a stable micro-bubble shower head. Background Art

[0002] Micro-nano bubble water refers to water containing a large number of tiny bubbles with diameters ranging from 0.1 to 50 μm. Its applications have gradually expanded from industry to everyday life. Micro-nano bubbles have a large specific surface area. A 10-micron bubble theoretically has 100 times the specific surface area of a 1-millimeter bubble at a given volume. This increases the contact area between air and water by a factor of 100, accelerating various reactions by a factor of 100.

[0003] Although existing microbubble shower structures can achieve the function of emitting bubbling water, air and water are prone to uneven mixing during use. Moreover, when the water flow rate changes, the air intake volume often cannot change in real time with the water flow rate, which can easily lead to unstable changes in bubble density. Different people have different experiences and requirements for microbubbles, which are specifically manifested in different requirements for bubble size and bubble density. However, existing devices are often unable to simultaneously adjust the microbubble size and the microbubble density in the water.

[0004] Therefore, improvements are made to the above problems. Summary of the Invention

[0005] Therefore, the present invention is made in response to the above problems. By designing an electric telescopic rod with different driving directions, the present invention solves the problem that existing devices easily mix air and water unevenly, and when the water flow rate changes, the air intake volume often fails to change in real time with the water flow rate, resulting in unstable changes in bubble density. Existing devices are often unable to simultaneously adjust the size of microbubbles and the density of microbubbles in the water. The present invention achieves the above-mentioned objectives through the following technical solutions:

[0006] The air suction device is connected with the mixing tube through a pipeline, and the mixing device is arranged in the mixing tube and is driven to rotate by water flow. A driving device for limiting the mixing device is provided on one side of the mixing device, and a bubble regulating device for cutting bubbles is provided on a side of the driving device away from the mixing device. The bubble regulating device comprises: a connecting ring, a cutting ring, a cutting block, a clamping block, a reciprocating screw, a cylindrical block, and a driving block. There are three connecting rings. The two connecting rings close to the shower head are movably arranged in a slideway on the inner wall surface of the mixing tube; the connecting ring away from the shower head is fixedly arranged on the inner wall surface of the mixing tube. A reciprocating screw is provided through the centers of the three connecting rings, and the reciprocating screw cooperates with the central thread of the two connecting rings close to the shower head. The distance between the connecting rings can be adjusted to cut bubbles. The end of the reciprocating screw close to the driving device is provided with a driving block cooperating with the driving device.

[0007] Preferably, the mixing device includes: a mixing fan blade, a rotating rod, a speed sensor, a friction block, a fixed block, and a protrusion. The mixing fan blade is fixedly arranged on the end of the rotating rod away from the shower head. The rotating rod is a hollow cylinder and is rotatably arranged on the inner wall of the mixing tube through a rotating bearing. The speed sensor is arranged on the side wall of the mixing fan blade close to the shower head. The friction block is fixed to the end of the fixed block close to the shower head by a spring. The fixed block is fixed to the inner wall of the mixing tube by a connecting rod and is located on the side of the mixing fan blade away from the shower head.

[0008] Preferably, the driving device includes: an electric telescopic rod, a moving rod, and a conical block. The electric telescopic rod is arranged on the inner wall surface of the mixing tube through a connecting rod. The moving rod is parallel to the electric telescopic rod and is connected to the output end of the electric telescopic rod through a rotating bearing. The moving rod passes through the mixing fan blades, and the central axes of the two are in the same direction. The moving rod can move relative to the mixing fan blades. The conical block is arranged at one end of the moving rod close to the shower head, and the conical block is adapted to the driving block.

[0009] Preferably, a protrusion is provided on the movable rod, and the protrusion fits into a bayonet provided on the rotating rod.

[0010] Preferably, a cutting ring is provided in the center of the two connecting rings close to the driving device, and the cutting ring is composed of three concentric circles with different radii, wherein the cutting ring with the largest radius and the cutting ring with the smallest radius are both arranged on the connecting ring close to the driving device, and the cutting ring with the middle radius is arranged on the connecting ring in the middle.

[0011] Preferably, movable blocks are provided on the annular outer wall surfaces of the two connecting rings close to the shower head.

[0012] Preferably, the connection ring away from the shower head is on the inner wall of the mixing tube through a positioning block pipeline, the positioning block and the adjacent moving block are in the same direction and the materials of the two are repelling magnetic structures.

[0013] Preferably, the reducer tube 1, the mixing tube, and the reducer tube 2 are connected in sequence, and the inner wall diameters of the tubes gradually decrease from the reducer tube 1 to the mixing tube to form a throat structure, and the inner wall diameters of the tubes gradually increase from the mixing tube to the reducer tube 2. The reducer section 1 is connected to the liquid channel, and the reducer tube 2 is connected to the shower head.

[0014] Preferably, a plurality of cutting blocks are provided in a ring shape on the connecting ring close to the shower head, and a clamping block is provided at the center of the ring-shaped arrangement of the cutting blocks, and the clamping block is engaged with the thread of the reciprocating screw rod.

[0015] Beneficial effects

[0016] The electric telescopic rod of the present invention drives the moving rod to move toward the direction of the cylindrical block so that the conical block collides with the driving block and engages with it. After engagement, the two have the same rotation state. The mixing fan blades rotate under the drive of the water flow, driving the reciprocating screw to rotate, thereby driving the clamping block to reciprocate and drive the fixed rings to move closer or separate. The fixed rings are fitted to drive the cutting block to fit with different numbers of cutting rings, so that the cutting block gathers with different numbers of cutting rings, resulting in different sizes of gaps formed between the cutting block and the cutting rings. Specifically, the more cutting rings gather, the smaller the bubbles are cut.

[0017] The rotation of the mixing fan blades of the present invention indirectly controls the setting of the transmission rate of the suction device through the speed sensor. The greater the water flow, the faster the mixing fan blades rotate to ensure a stable and sufficient mixing effect of bubbles and water. At the same time, the increase in the rotation speed of the mixing fan blades will also drive the transmission rate of the suction device to increase, and the air intake volume of the mixing tube per unit time will also increase accordingly, avoiding the problem of insufficient air intake after the water volume increases, resulting in a decrease in bubble density.

[0018] The reciprocating screw of the present invention drives the cutting block to move, and the positioning block and the moving block will move away from each other when not driven by external force. This not only allows the fixed ring to be gathered and separated, but also fully avoids the influence of water flow on the cutting block by converting rotation into movement, that is, water flow cannot directly drive the cutting block to move.

[0019] The electric telescopic rod of the present invention drives the movable rod to drive the friction block to compress the spring toward the fixed block. The spring is compressed, thereby increasing the friction between the movable rod and the friction block. The greater the degree to which the movable rod squeezes the friction block, the more the rotation speed of the mixing fan blade will decrease.

[0020] The arrangement of the electric telescopic rod driving the moving rod to contact the friction block or indirectly contact the driving block of the present invention can indirectly control the contact amount between air and water, that is, the amount of bubble generation. This makes it possible to control not only the size of the bubbles cut but also the amount of bubble generation by moving the electric telescopic rod, and both can be performed simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the present invention as a whole.

[0022] Figure 2 It is a structural schematic diagram of the main device of the present invention.

[0023] Figure 3 Schematic diagram of the structure of the mixing device of the present invention.

[0024] Figure 4 Schematic diagram of the structure of the driving device of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the driving device and the bubble regulating device of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure of the gas cutting block 1 and the cutting block 2 in the assembled state according to the present invention.

[0027] like Figure 1-6 As shown: 1. Liquid channel; 2. Reducer 1; 3. Mixing tube; 4. Reducer 2; 5. Shower head; 6. Suction device; 7. Mixing device; 71. Mixing fan blade; 72. Rotating rod 1; 73. Speed sensor; 74. Friction block; 75. Fixed block; 76. Protrusion; 8. Driving device; 81. Electric telescopic rod; 82. Moving rod; 83. Conical block; 9. Bubble regulating device; 91. Connecting ring; 92. Moving block; 93. Positioning block; 94. Cutting ring; 95. Cutting block; 96. Clamping block; 97. Reciprocating screw; 98. Cylindrical block; 99. Driving block. DETAILED DESCRIPTION

[0028] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that they can be easily implemented by a person skilled in the art. However, the present invention may be implemented in various forms and is not limited to the embodiments described below. In addition, components not relevant to the present invention may be omitted from the drawings to more clearly illustrate the present invention.

[0029] like Figure 1-2 As shown, a stable micro-bubble shower head includes: a liquid channel 1, a reducing pipe 1 2, a mixing pipe 3, a reducing pipe 2 4, a shower head 5, an air suction device 6, a mixing device 7, a driving device 8, and a bubble regulating device 9;

[0030] The liquid channel 1 is connected to an external water pipe during specific implementation, and the water in the external water pipe is directed to the liquid channel 1 and the reducing section 1 2;

[0031] The reducing pipe 1 2, the mixing pipe 3, and the reducing pipe 2 4 are made of common steel pipes and are sequentially connected. The inner wall diameters of the reducing pipe 1 2 and the mixing pipe 3 gradually decrease to form a throat structure. When water is introduced into the liquid channel 1, the mixing pipe 3 can generate an adsorption force to draw the air in the suction device 6 toward the mixing pipe 3.

[0032] The inner diameter of the pipes from the mixing pipe 3 to the reducer 2 4 gradually increases. The reducer 1 2 is connected to the liquid channel 1, and the reducer 2 4 is connected to the shower head 5. This allows the water entering the liquid channel 1 to be accelerated by the reducer 1 2, mixed with the air in the mixing pipe 3, separated by the bubbles in the reducer 2 4, and finally sprayed out from the hole on the shower head 5.

[0033] The air intake device 6 is a hollow cavity structure, which is arranged on the mixing tube 3. The interior of the air intake device 6 is connected to the interior of the mixing tube 3 through a pipe. The air intake device 6 has a built-in controller that can receive the speed information from the mixing device 7 and control the rate at which the air intake device 6 transmits air to the interior of the mixing tube 3 based on the information. The air intake device 6 is also provided with an opening for external air to flow into its internal cavity structure.

[0034] The mixing device 7 is arranged in the mixing tube 3;

[0035] The bubble regulating device 9 is arranged in the mixing tube 3;

[0036] The driving device 8 is arranged inside the mixing tube 3;

[0037] like Figure 3-4 As shown, the mixing device 7 includes: a mixing blade 71, a rotating rod 72, a speed sensor 73, a friction block 74, a fixing block 75, and a protrusion 76;

[0038] The mixing blade 71 is fixedly mounted on the end of the rotating rod 72 away from the shower head 5;

[0039] The rotating rod 1 72 is a hollow cylinder, which is rotatably arranged on the inner wall of the mixing tube 3 through a rotating bearing. The rotating rod 1 72 is provided with a bayonet that can engage with the protrusion 76;

[0040] The speed sensor 73 is arranged on a side wall of the mixing blade 71 close to the shower head 5. In a specific implementation, the speed sensor 73 can sense the rotation speed information of the mixing blade 71 in real time and transmit the information to the controller built into the suction device 6;

[0041] The friction block 74 is fixed by a spring to the end of the fixed block 75 close to the shower head 5. The fixed block 75 is fixed by a connecting rod to the inner wall of the mixing tube 3 and is located on the side of the mixing blade 71 away from the shower head 5.

[0042] In a specific implementation, the moving rod 82 can collide with the friction block 74 and drive the friction block 74 to compress the spring and move toward the fixed block 75. The spring is compressed, thereby increasing the friction between the moving rod 82 and the friction block 74.

[0043] The protrusion 76 is provided on the movable rod 82, and the protrusion 76 fits in the bayonet on the rotating rod 1 72, so that the rotating rod 1 72 can rotate by driving the movable rod 82 through the protrusion 76; the movable rod 82 and the rotating rod 1 72 have the same rotational state;

[0044] like Figure 4 As shown, the driving device 8 includes: an electric telescopic rod 81, a moving rod 82, and a tapered block 83;

[0045] The electric telescopic rod 81 is arranged on the inner wall of the mixing tube 3 through a connecting rod;

[0046] The movable rod 82 is arranged parallel to the electric telescopic rod 81 and is connected to the output end of the electric telescopic rod 81 through a rotating bearing; the movable rod 82 passes through the mixing blade 71, and the central axes of the movable rod 82 and the mixing blade 71 are in the same direction, and the movable rod 82 can move relative to the mixing blade 71;

[0047] The conical block 83 is disposed at one end of the movable rod 82 close to the shower head 5;

[0048] like Figure 5-6 As shown, the bubble regulating device 9 includes: a connecting ring 91, a moving block 92, a positioning block 93, a cutting ring 94, a cutting block 95, a clamping block 96, a reciprocating screw 97, a cylindrical block 98, and a driving block 99;

[0049] There are three connecting rings 91. The two connecting rings 91 close to the shower head 5 are movably arranged in a slideway on the inner wall of the mixing tube 3 through a moving block 92; the connecting ring 91 away from the shower head 5 is fixedly arranged on the inner wall of the mixing tube 3 through a positioning block 93.

[0050] The cutting ring 94 is composed of three concentric circles with different radii, and the concentric circles are connected by connecting rods diverging from the center of the circle. The cutting ring 94 with the largest radius and the cutting ring 94 with the smallest radius are both arranged on the connecting ring 91 close to the tapered block 83, and the cutting ring 94 with the middle radius is arranged on the connecting ring 91 in the middle.

[0051] The cutting blocks 95 are arranged in a plurality of ring shapes on the connecting ring 91 close to the shower head 5;

[0052] The clamping block 96 is arranged at the center of the circular arrangement of the cutting blocks 95, and the two are fixedly connected;

[0053] The reciprocating screw 97 is mounted on a cylindrical block 98 via a rotating bearing. The reciprocating screw 97 is provided with two thread grooves with the same pitch and opposite rotation directions. The clamping block 96 engages with the thread grooves of the reciprocating screw 97, so that when the reciprocating screw 97 is driven to rotate by the tapered block 83, the clamping block 96 engaged with the reciprocating screw 97 can move back and forth.

[0054] The cylindrical block 98 is arranged at the center of the connecting ring 91 close to the conical block 83, and the cylindrical block 98 is connected to the connecting ring 91 through a connecting rod;

[0055] The driving block 99 is provided at one end of the reciprocating screw 97 close to the tapered block 83. The driving block 99 is a hollow cavity structure with a protrusion provided inside thereof that engages with the tapered block 83, and the protrusions are in the same direction. In a specific implementation, the tapered block 83 can be engaged inside the driving block 99.

[0056] There are multiple moving blocks 92, which are respectively arranged on the annular outer wall surfaces of the two connecting rings 91 close to the shower head 5, and are mainly used for moving the two connecting rings 91, and the moving slides of the two connecting rings 91 are different;

[0057] The positioning block 93 is mainly used to fix the connecting ring 91 of the shower head 5 on the inner wall of the mixing tube 3. The positioning block 93 and the adjacent moving block 92 are in the same direction, and the two are made of repelling magnetic structures, so that the positioning block 93 and the moving block 92 will move away from each other when not driven by external force.

[0058] The central axis of the connecting ring 91 , the cutting ring 94 , the cutting block 95 , the clamping block 96 , the reciprocating screw rod 97 , the cylindrical block 98 , and the driving block 99 is the same as that of the moving rod 82 .

[0059] Working principle of the present invention:

[0060] During the specific implementation process, the operator first connects the liquid channel to the external water pipe, so that the water entering the liquid channel 1 is accelerated through the reducer 1 2, mixed with the air in the mixing tube 3, and finally sprayed out from the hole on the shower head 5 through the reducer 2 4;

[0061] The bubble water initially formed in the mixing tube 3 drives the mixing blades 71 to rotate, and the mixing blades 71 further mix the air and water through rotation to avoid the problem of uneven bubble distribution;

[0062] After the mixing blades 71 rotate, the speed sensor 73 will collect its rotation speed and transmit the rotation speed information to the controller built into the air intake device 6 to indirectly control the speed of air transmission from the air intake device 6 to the inside of the mixing tube 3. Specifically, the greater the rotation speed of the mixing blades 71, the greater the air transmission speed of the air intake device 6 to the inside of the mixing tube 3, and vice versa. When the mixing blades 71 stop rotating, the air intake device 6 will also stop operating.

[0063] The greater the water flow, the faster the mixing blades 71 rotate to ensure a stable and sufficient mixing effect of bubbles and water. At the same time, the increase in the rotation speed of the mixing blades 71 will also drive the transmission rate of the suction device 6 to increase, and the air intake volume of the mixing tube 3 per unit time will also increase accordingly, avoiding the problem of insufficient air intake after the water volume increases, resulting in a decrease in bubble density.

[0064] When the bubble size needs to be changed, it is only necessary to control the electric telescopic rod 81 to drive the moving rod 82 to move toward the cylindrical block 98 so that the conical block 83 collides and engages with the driving block 99, so that the two have the same rotation state; then the mixing blade 71 rotates under the drive of the water flow to drive the rotating rod 1 72 to rotate, and the rotating rod 1 72 rotates through the protrusion 76 to drive the moving rod 82 to rotate, which can then drive the driving block 99 and the reciprocating screw 97 to rotate. The reciprocating screw 97 rotates to drive the card block 96 to reciprocate and drive the connecting ring 91 near the shower head 5 to move toward the conical block 83, and the connecting rings 91 are then close to each other and fit together;

[0065] The connection ring 91 is fitted to drive the cutting block 95 to fit with different numbers of cutting rings 94, which makes the cutting block 95 and different numbers of cutting rings 94 gather together, resulting in different sizes of gaps between the cutting block 95 and the cutting rings 94. Specifically, the more cutting rings 94 gather, the smaller the bubbles are cut. Figure 6 ;

[0066] The cutting block 95 is driven to move by the rotation of the reciprocating screw 97, and the positioning block 93 and the moving block 92 are moved away from each other when not driven by external force. This not only allows the connecting ring 91 to be gathered and separated, but also fully avoids the influence of water flow on the cutting block 95 by converting rotation into movement, that is, the water flow cannot directly drive the cutting block 95 to move.

[0067] When the electric telescopic rod 81 drives the moving rod 82 to approach the friction block 74 and collide with it, the friction block 74 compresses the spring and moves it toward the fixed block 75. The spring is compressed, which increases the friction between the moving rod 82 and the friction block 74. The more the moving rod 82 squeezes the friction block 74, the more the rotation speed of the mixing blade 71 decreases.

[0068] The moving rod 82 can only contact the friction block 74 when the conical block 83 will not drive the reciprocating screw 97 to rotate. By driving the moving rod 82 to contact the friction block 74 or indirectly contact the driving block 99 through the electric telescopic rod 81, the contact amount between air and water can be indirectly controlled, that is, the amount of bubble generation can be controlled. This makes it possible to control not only the size of the bubbles being cut but also the amount of bubbles generated by moving the electric telescopic rod 81, and both can be carried out simultaneously.

Claims

1. A stable micro-bubble shower head, comprising a liquid channel (1), a first reducer (2), a mixing tube (3), a second reducer (4), a shower head (5), an air suction device (6), a mixing device (7), a driving device (8), and a bubble regulating device (9), characterized in that: The air suction device (6) is connected to the mixing tube (3) through a pipeline. The mixing device (7) is arranged in the mixing tube (3) and is driven to rotate by water flow. A driving device (8) for limiting the mixing device (7) is provided on one side. A bubble regulating device (9) for cutting bubbles is provided on the side of the driving device (8) away from the mixing device (7). The bubble regulating device (9) comprises: a connecting ring (91), a cutting ring (94), a cutting block (95), a clamping block (96), a reciprocating screw rod (97), a cylindrical block (98), and a driving block (99). There are three connecting rings (91). The two connecting rings (91) close to the shower head (5) are movably arranged in a slideway on the inner wall surface of the mixing tube (3); the connecting ring (91) away from the shower head (5) is fixedly arranged on the inner wall surface of the mixing tube (3); a reciprocating screw rod (97) is provided through the center of the three connecting rings (91), and the reciprocating screw rod (97) is matched with the central thread of the two connecting rings (91) close to the shower head (5); the distance between the connecting rings (91) can be adjusted to achieve bubble cutting; and a driving block (99) that cooperates with the driving device (8) is provided at one end of the reciprocating screw rod (97) close to the driving device (8).

2. A stable micro-bubble shower head according to claim 1, characterized in that: The mixing device (7) comprises: a mixing blade (71), a rotating rod (72), a speed sensor (73), a friction block (74), a fixed block (75), and a protrusion (76). The mixing blade (71) is fixedly arranged on the end of the rotating rod (72) away from the shower head (5). The rotating rod (72) is a hollow cylinder and is rotatably arranged on the inner wall of the mixing tube (3) through a rotating bearing. The speed sensor (73) is arranged on the side wall of the mixing blade (71) close to the shower head (5). The friction block (74) is fixedly arranged on the end of the fixed block (75) close to the shower head (5) through a spring. The fixed block (75) is fixedly arranged on the inner wall of the mixing tube (3) through a connecting rod and is located on the side of the mixing blade (71) away from the shower head (5).

3. A stable micro-bubble shower head according to claim 2, characterized in that: The driving device (8) comprises: an electric telescopic rod (81), a moving rod (82), and a tapered block (83); the electric telescopic rod (81) is arranged on the inner wall surface of the mixing tube (3) through a connecting rod; the moving rod (82) is parallel to the electric telescopic rod (81) and is connected to the output end of the electric telescopic rod (81) through a rotating bearing; the moving rod (82) passes through the mixing blade (71), and the central axes of the two are in the same direction; the moving rod (82) can move relative to the mixing blade (71); the tapered block (83) is arranged at one end of the moving rod (82) close to the shower head (5), and the tapered block (83) is adapted to the driving block (99).

4. A stable micro-bubble shower head according to claim 3, characterized in that: The movable rod (82) is provided with a protrusion (76), and the protrusion (76) is engaged with the bayonet provided on the rotating rod (72).

5. The stable micro-bubble shower head according to claim 1, characterized in that: A cutting ring (94) is provided at the center of two connecting rings (91) close to the driving device (8). The cutting ring (94) is composed of three concentric circles with different radii, wherein the cutting ring (94) with the largest radius and the cutting ring (94) with the smallest radius are both provided on the connecting ring (91) close to the driving device (8), and the cutting ring (94) with the middle radius is provided on the connecting ring (91) located in the middle.

6. The stable micro-bubble shower head according to claim 1, characterized in that: A moving block (92) is provided on the annular outer wall surface of the two connecting rings (91) close to the shower head (5).

7. A stable micro-bubble shower head according to claim 6, characterized in that: The connecting ring (91) away from the shower head (5) is on the inner wall surface of the mixing tube (3) through a positioning block (93) pipeline. The positioning block (93) and the adjacent moving block (92) are in the same direction and are made of repelling magnetic structures.

8. The stable micro-bubble shower head according to claim 1, characterized in that: The reducer section 1 (2), the mixing tube (3), and the reducer section 2 (4) are connected in sequence, and the inner wall diameters of the reducer section 1 (2) and the mixing tube (3) gradually decrease to form a throat structure, and the inner wall diameters of the reducer section 1 (2) and the mixing tube (3) gradually increase to form a throat structure. The reducer section 1 (2) is connected to the liquid channel (1), and the reducer section 2 (4) is connected to the shower head (5).

9. The stable micro-bubble shower head according to claim 1, characterized in that: A plurality of cutting blocks (95) are provided in an annular shape on a connecting ring (91) close to the shower head (5). A clamping block (96) is provided at the center of the annularly arranged cutting blocks (95). The clamping block (96) is threadably engaged with a reciprocating screw rod (97).

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