Manual slide block stroke adjusting device

Abstract

The invention relates to a manual slide block stroke adjusting device, which mainly comprises a crankshaft, a shaft sleeve, a connecting rod, a linkage sleeve, a stroke scale ring piece, a stroke indicating piece, an adjusting rod and a clutch module, and is characterized in that the clutch module is manually controlled to be at a separation position, so that the clutch module drives the linkage sleeve to move along the axial direction; the second inner ring tooth part of the linkage sleeve is separated from the first inner ring tooth part of the shaft sleeve, the adjusting rod is driven to rotate, the shaft sleeve meshed with the two ends of the adjusting rod and the connecting rod on the shaft sleeve synchronously rotate with the stroke scale ring piece, and then the stroke position of the sliding block on the connecting rod is adjusted; meanwhile, scales on the stroke scale ring piece are changed to correspond to the indicating part of the stroke indicating piece, the stroke adjustment of the sliding block is manually completed, the structural design for completing the stroke adjustment of the sliding block is simple, and the adjustment is relatively simple and convenient.

Description

Technical Field

[0001] The invention relates to a slide block and actuating stroke of a punching machine, and in particular to a manual slide block stroke adjusting device. Background Art

[0002] A punch press applies pressure to metal materials to cause them to deform plastically and obtain the required shape and precision. It is usually used in conjunction with a mold and is an important equipment for producing metal machinery parts.

[0003] In the punch press specification parameter list, the slider stroke is an important reference data. The slider stroke refers to the distance from the top dead center (the highest point of displacement) to the bottom dead center (the lowest point of displacement) when the punch press drives the slider up and down during operation.

[0004] When using a punch press for stamping production, it must be completed in conjunction with the relevant mold. At this time, the height of the slider must be adjusted according to the height of the mold. Sometimes, a suitable slider actuation stroke must be selected in conjunction with the stamping part. Therefore, how to develop a slider stroke adjustment device with a simple structure and easy adjustment is an urgent problem to be solved. Summary of the invention

[0005] The object of the present invention is to provide a manual slider stroke adjustment device which has a simple structure and is easy to adjust.

[0006] To achieve the aforementioned objectives, the present invention provides a manual slider stroke adjustment device, comprising: a crankshaft having a first shaft section and a second shaft section along an axial direction; a shaft sleeve, sleeved on the second shaft section, and having an eccentric ring portion, a first inner ring tooth portion and a first outer ring tooth portion arranged on one side of the eccentric ring portion; a connecting rod, sleeved on the eccentric ring portion of the shaft sleeve and used to connect a slider; a linkage sleeve, sleeved on the first shaft section and capable of being displaced along the axial direction, and having a second inner ring tooth portion that meshes with or disengages from the first inner ring tooth portion; a stroke scale ring, pivotally mounted on the linkage sleeve, and having a stroke scale ring portion and a stroke ring tooth portion; a stroke indicator, fixedly mounted on the linkage sleeve, and having a guide on the stroke scale ring portion An indicating portion; an adjusting rod, pivotally mounted on the linkage sleeve and having a second outer ring tooth portion meshing with the first outer ring tooth portion, an adjusting tooth portion opposite to the second outer ring tooth portion and meshing with the stroke ring tooth portion, and an adjusting portion; and a clutch module, fixedly mounted on the linkage sleeve and capable of moving between a separation position and a coupling position and disposed on the first shaft section of the crankshaft; when the clutch module is in the separation position, the clutch module drives the linkage sleeve to displace axially and causes the second inner ring tooth portion of the linkage sleeve to disengage from the first inner ring tooth portion of the shaft sleeve; when the clutch module is in the coupling position, the clutch module drives the linkage sleeve to displace axially in the opposite direction and causes the second inner ring tooth portion of the linkage sleeve to mesh with the first inner ring tooth portion of the shaft sleeve.

[0007] The effect of the present invention is that by manually controlling the clutch module in the separation position, the clutch module drives the linkage sleeve to move axially, and the second inner ring tooth portion of the linkage sleeve is separated from the first inner ring tooth portion of the sleeve. At this time, the adjustment rod is driven to rotate, so that the sleeve meshing with the two ends of the adjustment rod and the connecting rod thereon rotate synchronously with the stroke scale ring, thereby adjusting the stroke position of the slider on the connecting rod, and at the same time changing the scale on the stroke scale ring to correspond to the indicating portion of the stroke indicator, so as to manually complete the adjustment of the slider stroke. The structural design of the slider stroke adjustment completed by the present invention is simple, and the adjustment is relatively simple.

[0008] Preferably, the first shaft section of the crankshaft is radially recessed with a first groove, a pin is fixed to the first groove, and the pin part radially protrudes from the first groove. The linkage sleeve also has a set of sleeve holes arranged in the first shaft section, and the wall of the sleeve hole is radially recessed with a second groove for accommodating the pin.

[0009] Preferably, the first inner ring tooth portion of the sleeve is formed along the axial direction, and the first outer ring tooth portion is formed along the radial direction.

[0010] Preferably, the linkage sleeve also has a pivot hole parallel to the sleeve hole, the adjustment rod is pivotally disposed in the pivot hole of the linkage sleeve, and the second outer ring tooth portion protrudes from one end of the pivot hole, and the adjustment tooth portion and the adjustment portion protrude from the other end of the pivot hole.

[0011] Preferably, the linkage sleeve is recessed with a pivot groove along the radial direction, and the travel scale ring also has a pivot portion pivotally arranged in the pivot groove.

[0012] Preferably, the clutch module has a clutch assembly, a fixing member, and a clutch control member. The clutch assembly is located on the end surface of the first shaft section of the crankshaft. The fixing member is inserted and fixed between the clutch assembly and the connecting sleeve. The clutch control member has a clutch control portion pivotally mounted on the clutch assembly, and a clutch body portion passing through the clutch assembly and screwed on the first shaft section. When the clutch control portion is driven to rotate forward, the clutch module is in a disengaged position. When the clutch control portion is driven to rotate reversely, the clutch module is in an engaged position.

[0013] Preferably, the clutch module also has a limit member, which has a limit body fixed to the first shaft segment, and a limit head connected to the limit body, and the clutch assembly has a limit surface corresponding to the limit head, and when the clutch module is in the separation position, the limit surface and the limit head abut against each other.

[0014] Preferably, the travel scale ring part of the travel scale ring has numbers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a stereogram of an embodiment of the present invention;

[0016] Figure 2A is a front view of an embodiment of the present invention;

[0017] Figure 2B is a side view of an embodiment of the present invention;

[0018] Figure 2C yes Figure 2B A partial enlarged view of

[0019] Figure 3A It is a three-dimensional exploded view of an embodiment of the present invention, mainly showing the state where the shaft sleeve and the linkage sleeve are separated;

[0020] Figure 3B It is a three-dimensional exploded view of an embodiment of the present invention, mainly showing the separation state of the shaft sleeve and the linkage sleeve from another perspective;

[0021] Figure 4A yes Figure 2A a cross-sectional view along line segment 4A-4A;

[0022] Figure 4B yes Figure 4A A partial enlarged view of

[0023] Figure 5 yes Figure 2A Section view of line segment 5-5;

[0024] Fig. 6A is an action diagram of an embodiment of the present invention, showing the state of the clutch module in the disengaged position;

[0025] Figure 6B yes Fig. 6A A partial enlarged view of

[0026] Figure 7 is a partial enlarged view showing the state in which the second inner ring tooth portion of the linkage sleeve and the first inner ring tooth portion of the shaft sleeve are separated from each other;

[0027] Figure 8 is an action diagram of an embodiment of the present invention, showing the state of driving the adjustment rod to rotate;

[0028] Fig. 9 is an operation diagram of an embodiment of the present invention, showing a state where the slider stroke is adjusted from 140 mm to 113 mm;

[0029] Fig.10 is an action diagram of an embodiment of the present invention, showing the state of the clutch module in the engaged position after the slider stroke is adjusted; Fig.11A is a schematic diagram of an embodiment of the present invention, showing a state before adjustment; and

[0030] Fig. 11B is a schematic diagram of an embodiment of the present invention, showing the adjusted state.

[0031] Description of symbols in the accompanying drawings:

[0032] X…Axial

[0033] Y…Radial

[0034] 10…Crankshaft

[0035] 11…First shaft section

[0036] 111…First Groove

[0037] 112…Thread groove

[0038] 12…Second shaft section

[0039] 20… Bushing

[0040] 21…Hole

[0041] 22…Eccentric ring

[0042] 23…First inner ring tooth portion

[0043] 24…First outer ring tooth portion

[0044] 30…Connecting rod

[0045] 31…Connecting rod sleeve

[0046] 32…Connection

[0047] 40…Linkage

[0048] 41…Hole

[0049] 411…Second Groove

[0050] 42…Second inner ring tooth portion

[0051] 43… Pivot slot

[0052] 44… Pivot hole

[0053] 50…travel scale ring 51…travel scale ring 511…number

[0054] 52…Stroke ring gear

[0055] 53…pivot

[0056] 60…Travel indicator

[0057] 61…Instruction Department

[0058] 70…Adjustment rod

[0059] 71 ... second outer ring tooth portion 72 ... adjustment tooth portion

[0060] 73…Adjustment Department

[0061] 80…Clutch module

[0062] 81…Clutch assembly

[0063] 811…External clutch block

[0064] 8111…Pivot slot

[0065] 8112…Adjustment jack

[0066] 8113…Limiting slot

[0067] 812…Inner clutch block

[0068] 8121…limiting surface 8122…first through hole 8123…second through hole 812382…fixing piece

[0069] 83…Clutch control parts

[0070] 831…Clutch control unit

[0071] 832…Clutch

[0072] 84…Limiting parts

[0073] 841…Limited Body

[0074] 842…Limiting head

[0075] 90…Machine panel

[0076] 91…Screw

[0077] 92…Pin

[0078] 93…Slider

[0079] 94…Copper sleeve

[0080] 95…Hexagonal wrench DETAILED DESCRIPTION

[0081] Before presenting a detailed description, it should be noted that in the following description, similar components and part names are represented by the same numbers, and the directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used in the embodiments are used to illustrate and are not used to limit the present invention.

[0082] See also Figures 1 to 4BAs shown, the embodiment of the present invention provides a manual slider stroke adjustment device, which is assembled on a machine plate 90. The manual slider stroke adjustment device is mainly composed of a crankshaft 10, a sleeve 20, a connecting rod 30, a connecting sleeve 40, a stroke scale ring 50, a stroke indicator 60, an adjustment rod 70, and a clutch module 80, wherein:

[0083] The crankshaft 10 has a first shaft section 11 and a second shaft section 12 connected to the first shaft section 11 along an axial direction X. In this embodiment, the first shaft section 11 is provided with a first groove 111 along a radial direction Y, and a thread groove 112 along the axial direction X. The first groove 111 is fixed with a pin 92 by a screw 91, and a portion of the pin 92 protrudes from the first groove 111 along the radial direction Y.

[0084] Cooperate Figure 3A and Figure 3B As shown, the sleeve 20 is sleeved on the second shaft section 12 of the crankshaft 10, and has a sleeve hole 21 sleeved on the second shaft section 12, an eccentric ring portion 22, a first inner ring tooth portion 23 and a first outer ring tooth portion 24 arranged on one side of the eccentric ring portion 22, wherein the first inner ring tooth portion 23 is formed along the axial direction X, and the first outer ring tooth portion 24 is formed along the radial direction Y.

[0085] The connecting rod 30 is sleeved on the eccentric ring portion 22 of the shaft sleeve 20, and has a connecting rod sleeve portion 31 sleeved on the eccentric ring portion 22, and a connecting portion 32 (such as Figure 2A ), in this embodiment, a copper sleeve 94 is provided between the connecting rod sleeve portion 31 and the eccentric ring portion 22.

[0086] The linkage sleeve 40 is sleeved on the first shaft section 11 of the crankshaft 10 and can be displaced along the axial direction X, and has a sleeve hole 41 arranged on the first shaft section 11, a second inner ring tooth portion 42 arranged on one side of the linkage sleeve 40 and meshing with or disengaging from the first inner ring tooth portion 23, a pivot groove 43 arranged on the other side of the linkage sleeve 40 and recessed along the radial direction Y, and a pivot hole 44 parallel to the sleeve hole 41, wherein the hole wall of the sleeve hole 41 is recessed along the radial direction Y with a second groove 411 for seating the pin 92, so that the linkage sleeve 40 rotates synchronously with the crankshaft 10, and the linkage sleeve 40 can only be displaced in the axial direction X relative to the crankshaft 10.

[0087] The travel scale ring 50 is pivotally mounted on the linkage sleeve 40 and comprises a travel scale ring portion 51, a travel ring tooth portion 52, and a pivot portion 53 pivotally mounted in the pivot groove 43 of the linkage sleeve 40. In the present embodiment, the travel scale ring portion 51 is marked with scales and numbers 511, and the numbers 511 represent the travel distance of the slider 93.

[0088] The stroke indicator 60 is fixedly mounted on the linkage sleeve 40 and has an indicator portion 61 pointing on the stroke scale ring portion 51. Figure 2A As shown, the indicator portion 61 indicates the position marked 140 on the stroke scale ring portion 51, indicating that the current stroke of the slider 93 is 140 mm.

[0089] The adjusting rod 70 is pivotally mounted on the pivot hole 44 of the linkage sleeve 40, and has a second outer ring tooth portion 71 protruding from one end of the pivot hole 44 and meshing with the first outer ring tooth portion 24 of the shaft sleeve 20, an adjusting tooth portion 72 protruding from the other end of the pivot hole 44 and meshing with the travel ring tooth portion 52 of the travel scale ring 50, and an adjusting portion 73 protruding from the other end of the pivot hole 44 and located on the same side as the adjusting tooth portion 72.

[0090] The clutch module 80 is fixedly mounted on the linkage sleeve 40 and can be in a separation position (such as Figure 6B ) and a binding position (such as Figure 4B ) is provided between the first shaft section 11 of the crankshaft 10; Figure 6B As shown, when the clutch module 80 is in the disengaged position, the clutch module 80 drives the linkage sleeve 40 to move along the axial direction X, and causes the second inner ring tooth portion 42 of the linkage sleeve 40 to be separated from the first inner ring tooth portion 23 of the shaft sleeve 20; see Figure 4B As shown, when the clutch module 80 is in the engaged position, the clutch module 80 drives the linkage sleeve 40 to move in the reverse direction along the axial direction X, and makes the second inner ring tooth portion 42 of the linkage sleeve 40 mesh with the first inner ring tooth portion 23 of the shaft sleeve 20. In this embodiment, the clutch module 80 includes a clutch assembly 81, a plurality of fixing members 82, a clutch control member 83, and a plurality of limit members 84;

[0091] The clutch assembly 81 is located at the end surface of the first shaft section 11 of the crankshaft 10, and is composed of an outer clutch block 811 and an inner clutch block 812 that are locked to each other. The outer clutch block 811 has a pivot slot 8111 with a notch facing the first shaft section 11, an adjustment socket 8112 communicating with the pivot slot 8111, and a plurality of limit slots 8113 surrounding the pivot slot 8111 and with the notch facing the first shaft section 11. The inner clutch block 812 has a limit surface 8121 abutting against one side of the outer clutch block 811, a first through hole 8122 penetrating the limit surface 8121 and communicating with the pivot slot 8111, and a second through hole 8123 penetrating the limit surface 8121 and communicating with the limit slot 8113.

[0092] Cooperate Figure 5As shown, the plurality of fixing members 82 are inserted and fixed between the outer clutch block 811, the inner clutch block 812 and the linkage sleeve 40, so that the clutch assembly 81 is fixedly connected to the linkage sleeve 40, so that the clutch assembly 81 can drive the linkage sleeve 40, and the stroke scale ring 50, the stroke indicator 60, and the adjustment rod 70 provided on the linkage sleeve 40 to synchronously move along the axial direction X.

[0093] The clutch control member 83 comprises a clutch control portion 831 pivotally mounted in the pivot groove 8111 of the outer clutch block 811, and a clutch body portion 832 connected to the clutch control portion 831, passing through the first through hole 8122 and screwed in the thread groove 112 of the first shaft section 11 of the crankshaft 10. By driving the clutch control portion 831 of the clutch control member 83 to pivot in the clutch assembly 81, the clutch body portion 832 is screwed forward or backward relative to the thread groove 112 to control the clutch assembly 81 to approach or move away from the crankshaft 10, that is, when the clutch control portion 831 is driven to rotate forward, the clutch module 80 is in a disengaged position, and when the clutch control portion 831 is driven to rotate reversely, the clutch module 80 is in a coupled position.

[0094] The limiting member 84 has a limiting body 841 that penetrates the second through hole 8123 and is fixed to the first shaft section 11, and a limiting head 842 that is connected to the limiting body 841 and is located in the limiting groove 8113 of the outer clutch block 811. The limiting head 842 corresponds to the limiting surface 8121 of the inner clutch block 812, and cooperates with the limiting surface 8121 of the inner clutch block 812. Figure 6B As shown, the design of the limiting member 84 limits the distance between the clutch assembly 81 and the crankshaft 10 . When the clutch module 80 is in the disengaged position, the limiting surface 8121 and the limiting head 842 abut against each other.

[0095] The above is the configuration description of each major component of the embodiment of the present invention. The operation mode and effect of the present invention are described as follows.

[0096] See also Figure 2A and Figure 4A As shown, the indicating portion 61 of the stroke indicating member 60 indicates the position marked 140 on the stroke scale ring portion 51 of the stroke scale ring member 50 , indicating that the current stroke of the slider 93 is 140 mm.

[0097] At this time, if you want to change the stroke of the slider 93, refer to Fig. 6A and Figure 6B As shown, a hexagonal wrench 95 is inserted into the clutch control portion 831 of the clutch control member 83 and rotated forward (or reversely) to pivot the clutch control portion 831 of the clutch control member 83 in the clutch assembly 81, thereby causing the clutch assembly 81 to move from the engagement position (such as Figure 4B) is moved to the separation position (6B), that is, the clutch assembly 81 is displaced along the axial direction X to the left side of the first shaft section 11 of the crankshaft 10 until the limiting surface 8121 of the clutch assembly 81 touches the limiting head 842 of the limiting member 84. At this time, the clutch assembly 81 moving leftward synchronously drives the linkage sleeve 40, and the stroke scale ring 50, the stroke indicator 60, and the adjustment rod 70 provided on the linkage sleeve 40 to move leftward along the axial direction X, and the second inner ring tooth portion 42 of the linkage sleeve 40 is separated from the first inner ring tooth portion 23 of the shaft sleeve 20 (as shown in FIG. Figure 7 ), at this time, the second outer ring tooth portion 71 of the adjusting rod 70 still remains in meshing with the first outer ring tooth portion 24 of the sleeve 20.

[0098] Next, see Figure 2. Figure 6B , Figure 8 and Fig. 9 As shown, a hexagonal wrench 95 of another size is inserted into the adjustment portion 73 of the adjustment rod 70 and rotated forward (or reversely) to make the second outer ring tooth portion 71 and the adjustment tooth portion 72 on both sides of the adjustment rod 70 rotate synchronously, so that the second outer ring tooth portion 71 drives the shaft sleeve 20 and the connecting rod 30 thereon to rotate an angle, thereby adjusting the stroke position of the slider 93 on the connecting rod 30, and the adjustment tooth portion 72 drives the stroke scale ring 50 to rotate an angle, thereby changing the scale and number 511 on the stroke scale ring 50 corresponding to the indicating portion 61 of the stroke indicator 60, as shown in FIG. Fig. 9 As shown, the indicating portion 61 of the stroke indicator 60 indicates that the stroke scale ring portion 51 is adjusted from the mark 140 to the position 113, indicating that the stroke of the slider 93 is adjusted from 140 mm to 113 mm.

[0099] Finally, see Fig.10 As shown, a hexagonal wrench 95 is inserted into the clutch control portion 831 of the clutch control member 83 and rotated in the reverse direction (or in the forward direction) to pivot the clutch control portion 831 in the clutch assembly 81, thereby causing the clutch assembly 81 to move from the separation position (such as Figure 6B ) to the binding position (such as Figure 4B ), that is, the clutch assembly 81 moves along the axial direction X to the right side of the first shaft section 11 of the crankshaft 10 until the clutch assembly 81 touches the end surface of the first shaft section 11 of the crankshaft 10. At this time, the second inner ring tooth portion 42 of the linkage sleeve 40 that moves to the right is re-engaged with the first inner ring tooth portion 23 of the sleeve 20 (as shown in FIG. Figure 2C ), thereby manually completing the adjustment of the stroke of the slider 93. Accordingly, the structural design of the slider stroke adjustment of the present invention is simple, and the adjustment is relatively simple.

[0100] It is worth noting that, see Figure 2A Matching Fig.11AAs shown, the state before adjustment is shown, indicating that the eccentric ring portion 22 of the sleeve 20 is located at the top before adjustment, so that the slider 93 is located at the top dead center, and the stroke of the slider 93 is 140mm, see Fig. 9 Matching Fig. 11B As shown, it is explained that after adjustment, the eccentric ring portion 22 of the sleeve 20 is located to the left, and the slider 93 is also located at the top dead center, and the stroke of the slider 93 is 113 mm.

Claims

1. A manual slider stroke adjustment device, It is characterized in that The manual slider stroke adjustment device comprises: A crankshaft having a first shaft section and a second shaft section along an axial direction; a shaft sleeve, which is sleeved on the second shaft section and has an eccentric ring portion, a first inner ring tooth portion and a first outer ring tooth portion provided on one side of the eccentric ring portion; A connecting rod, which is sleeved on the eccentric ring portion of the shaft sleeve and is used to connect a sliding block; a linkage sleeve, which is displaceable along the axial direction and is sleeved on the first shaft section and has a second inner ring tooth portion that is engaged with or disengaged from the first inner ring tooth portion; A travel scale ring, pivotally mounted on the linkage sleeve, and comprising a travel scale ring portion and a travel ring tooth portion; A stroke indicator, fixedly mounted on the linkage sleeve and having an indicator portion pointing on the stroke scale ring portion; an adjusting rod pivotally mounted on the linkage sleeve and comprising a second outer ring tooth portion meshed with the first outer ring tooth portion, an adjusting tooth portion opposite to the second outer ring tooth portion and meshed with the travel ring tooth portion, and an adjusting portion; and A clutch module is fixedly mounted on the connecting sleeve and is capable of moving between a separation position and a coupling position and is disposed on the first shaft section of the crankshaft; when the clutch module is in the separation position, the clutch module drives the connecting sleeve to displace axially and causes the second inner ring tooth portion of the connecting sleeve to disengage from the first inner ring tooth portion of the shaft sleeve; when the clutch module is in the coupling position, the clutch module drives the connecting sleeve to displace axially in the opposite direction and causes the second inner ring tooth portion of the connecting sleeve to mesh with the first inner ring tooth portion of the shaft sleeve.

2. The manual slider stroke adjustment device according to claim 1, It is characterized in that The first shaft section of the crankshaft is radially recessed with a first groove, a pin is fixedly disposed in the first groove, the pin part radially protrudes out of the first groove, the linkage sleeve also has a set of sleeve holes disposed in the first shaft section, the sleeve hole wall is radially recessed with a second groove for accommodating the pin.

3. The manual slider stroke adjustment device according to claim 1, It is characterized in that The first inner ring tooth portion of the sleeve is formed in the axial direction, and the first outer ring tooth portion is formed in the radial direction.

4. The manual slider stroke adjustment device according to claim 2, It is characterized in that The linkage sleeve also has a pivot hole parallel to the sleeve hole, the adjustment rod is pivoted in the pivot hole of the linkage sleeve, and the second outer ring tooth portion protrudes from one end of the pivot hole, and the adjustment tooth portion and the adjustment portion protrude from the other end of the pivot hole.

5. The manual slider stroke adjustment device according to claim 1, It is characterized in that The linkage sleeve is recessed with a pivot groove along the radial direction, and the travel scale ring also has a pivot portion pivotally arranged in the pivot groove.

6. The manual slide stroke adjustment device according to claim 1, It is characterized in that The clutch module comprises a clutch assembly, a fixing part, and a clutch control part. The clutch assembly is located on the end surface of the first shaft section of the crankshaft. The fixing part is fixed between the clutch assembly and the linkage sleeve. The clutch control part comprises a clutch control part pivotally mounted on the clutch assembly, and a clutch body part passing through the clutch assembly and screwed on the first shaft section. When the clutch control part is driven to rotate forward, the clutch module is in a disengaged position. When the clutch control part is driven to rotate reversely, the clutch module is in a coupled position.

7. The manual slide stroke adjustment device according to claim 6, It is characterized in that The clutch module also has a limiting member, which has a limiting body fixed on the first shaft segment, and a limiting head connected to the limiting body. The clutch assembly has a limiting surface corresponding to the limiting head. When the clutch module is in the separation position, the limiting surface and the limiting head abut against each other.

8. The manual slide stroke adjustment device according to claim 1, It is characterized in that The stroke scale ring part of the stroke scale ring is provided with numbers.

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