Quick locking structure for shaft

Abstract

The utility model relates to a quick locking structure for a shaft. A quick locking structure for a shaft comprises a first component and a second component, the axial end face of one side of the first component makes contact with the axial end face of one side of the second component, the first component is provided with a connecting pin extending towards the direction of the second component, and the second component is provided with a connecting hole which is provided with an opening towards the side of the first component and matched with the connecting pin. A winding groove with a lateral opening is formed in the side wall of the bottom of the connecting pin, the winding groove comprises an entering section and a locking section, the entering section extends in the axial direction of the connecting pin and penetrates through the bottom of the connecting pin, the locking section is obliquely arranged, the bottom of the locking section is communicated with the entering section, and the top of the locking section is far away from the entering section; a locking protrusion which extends inwards in the radial direction of the connecting hole and is in sliding fit with the winding groove is arranged in the connecting hole. The tool has the advantages that an operator can conveniently and quickly replace shaft workpieces, and the replacement mode is simple.

Description

Technical Field

[0001] The utility model relates to a quick locking structure for a shaft. Background Art

[0002] Shaft workpieces are basic parts of mechanical parts. Some shaft workpieces can be used as the ram connectors and replaceable rams of presses, some shaft workpieces can be used as the base plate of machining center tooling, and some shaft workpieces can be used as the propulsion components of the propulsion mechanism on the automated assembly line, etc. However, shaft workpieces need to be replaced when different rams need to be replaced, the base plate of machining center tooling needs to be raised, and the shaft length of the propulsion component needs to be extended. Conventional shaft workpiece connections are usually threaded or conical fastening, etc.

[0003] For example, the Chinese patent application number 202023104555.0 discloses a replaceable press, including a replaceable connecting rod and a locking groove, the outer surfaces of the four sides of the replaceable connecting rod are provided with a protective layer, a connecting groove is provided on one side of the inner wall of the replaceable connecting rod, a connecting screw is provided at the lower end of the replaceable connecting rod, a locking block is provided on the outer surface of the lower end of the connecting screw, a locking groove is provided on the upper outer surface of the locking block, a fixing block is provided on the outer surface of the lower end of the locking block, a pressure head is provided on the outer surface of one side of the connecting screw, a docking groove is provided between the replaceable connecting rod and the pressure head, a No. 2 step surface is provided on one side of the pressure head, a right-angled side of degrees is provided on one side of the No. 2 step surface, a No. 1 step surface is provided on one side of the right-angled side of degrees, and anti-rust paint is provided on the outer surfaces of the four sides of the connecting screw.

[0004] In the above scheme, the shaft workpiece is a pressure head. When a pressure head of different specifications needs to be replaced, the operator is required to use a screwdriver to tighten the connecting screw. When the operator tightens, a large tightening force is required. After removing the pressure head, the operator picks up another pressure head and presses the pressure head upward with one hand to pre-position the pressure head and the replacement connecting rod. Then, the operator inserts the connecting screw into the connecting groove with the other hand, and then turns the screwdriver to screw the screw into the replacement connecting rod. The entire replacement process takes 3-5 minutes and is relatively troublesome. Utility Model Content

[0005] The utility model aims to provide a quick locking structure for shafts, which is convenient for operators to quickly replace shaft workpieces and has a relatively simple replacement method.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a quick locking structure for a shaft, comprising a first component and a second component, an axial end face of one side of the first component contacts an axial end face of one side of the second component, the first component is provided with a connecting pin extending toward the second component, and the second component is provided with a connecting hole opening toward the first component and cooperating with the connecting pin; a winding groove with a side opening is provided on the bottom side wall of the connecting pin, the winding groove comprises an entry section and a locking section, the entry section extends along the axial direction of the connecting pin and passes through the bottom of the connecting pin, the locking section is inclined, the bottom of the locking section is connected to the entry section, and the top of the locking section is away from the entry section; a locking protrusion is provided in the connecting hole, which extends radially inward along the connecting hole and slidably cooperates with the winding groove.

[0007] When in use, the operator screws the second component so that the locking protrusion of the second component starts to slide, and the locking protrusion slides from the locking section into the entry section, so that the second component and the first component change from a locked state to an unlocked state. After the locking protrusion slides into the entry section, the operator can directly take the second component so that the locking protrusion slides out from the entry section, and the connecting pin also withdraws from the connecting hole, thereby completing the separation between the second component and the first component. After that, the operator picks up another model of the second component, and moves the second component close to the first component so that the connecting pin enters the connecting hole. After that, the operator adjusts the position of the second component so that the locking protrusion slides into the entry section of the winding groove. After that, the operator screws the second component so that the second component slides into the locking section, and the second component will be close to the first component, so that one side axial end face of the first component contacts one side axial end face of the second component.

[0008] The contact between one side axial end surface of the first component and one side axial end surface of the second component ensures the flatness of the second component and prevents the second component from being offset.

[0009] The locking section is tilted and the bottom is connected to the entry section, and the top is away from the entry section. When the second component is screwed, the locking protrusion of the second component can slide independently from the locking section to the top of the locking section, so that the second component is close to the first component, thereby ensuring that the axial end face of one side of the second component contacts the axial end face of one side of the first component, and ensuring that the axial load force acts directly on the second component, avoiding damage caused by the connection pin and the locking protrusion bearing a large load force.

[0010] Among them, when the first component and the second component are used on a press, the first component is the press connecting head, and the second component is a replaceable pressing head; when the first component and the second component are used on a tooling base plate, the first component is the connecting part on the tooling base plate, and the second component is a component used to raise the bottom of the tooling; when the first component and the second component are used on a propulsion mechanism, the first component and the second component are both components of the propulsion mechanism, the first component is fixed to the propulsion mechanism, and the replacement of the second component is used to increase the axial length of the propulsion mechanism.

[0011] This solution achieves detachable fixation between the second component and the first component through winding grooves and locking protrusions. Compared with the screw thread matching method used in the reference document, the operator does not need to use a screwdriver to screw the screw. The operator can directly screw the second component to complete the disassembly and fixation between the second component and the first component, and at the same time ensure the surface contact between the second component and the first component, thereby ensuring the accuracy and uniform force of the second component. At the same time, it can achieve rapid locking and save time.

[0012] Preferably, the first component is provided with a positioning hole opening toward the second component, the connecting pin is slidably engaged with the positioning hole, an elastic member is provided in the positioning hole, and the connecting pin has a tendency to move into the positioning hole under the action of the elastic member.

[0013] The positioning hole positions the connecting pin in the circumferential direction to prevent the connecting pin from being offset; the connecting pin has a tendency to move into the positioning hole under the action of the elastic member, so that the connecting pin can be elastically retracted relative to the positioning hole. Sometimes, due to the deviation of the processing scale, when the second component is screwed, the locking protrusion has not slid to the upper end of the locking section, and the axial end face of one side of the second component and the axial end face of one side of the first component have been in contact. At this time, the second component cannot be screwed further, but this may cause the second component to fall off from the first component easily; by setting the connecting pin to be elastically retractable, it can be ensured that the upper end face of the second component is in contact with the lower end face of the first component, and the locking protrusion also slides to the upper end of the locking section and slides into place. At the same time, the elastic member has a tensioning force, which can also ensure that the second component is tightened and that the axial end face of one side of the second component is in contact with the axial end face of one side of the first component.

[0014] Preferably, the positioning hole includes a narrow section and a wide section in sequence from the opening side of the positioning hole to the bottom side of the positioning hole, and a step is formed between the wide section and the narrow section, and the connecting pin includes a small diameter section and a large diameter section in sequence from the opening side of the positioning hole to the bottom side of the positioning hole, the narrow section slides in conjunction with the small diameter section, and the wide section slides in conjunction with the large diameter section, the elastic member is sleeved on the outer wall of the small diameter section located in the wide section, and the two ends of the elastic member are respectively in contact with the bottom of the large diameter section and the step.

[0015] The elastic member is sleeved on the connecting pin so that the elastic member is axially along the connecting pin in the direction of the elastic member force.

[0016] Preferably, the second component includes a second component body and a locking sleeve, the first component includes a first component body and a locking block, the locking sleeve is provided with the connecting hole, and the locking block is provided with the connecting pin; the second component body is provided with a first fixing groove opening toward the first component side, the locking sleeve is fixed in the first fixing groove, and the axial depth of the first fixing groove is greater than the axial length of the locking sleeve; the first component body is provided with a second fixing groove opening toward the second component side, the locking block is fixed in the second fixing groove, the axial length of the locking block is greater than the axial depth of the second fixing groove, one end of the locking block extends into the first fixing groove and the outer wall of the locking block contacts the groove wall of the first fixing groove.

[0017] The second component is configured as a second component body and a locking sleeve, and the first component is configured as a first component body and a locking block. This facilitates processing and manufacturing by operators. At the same time, the locking block can be inserted into the first fixing groove, and the outer wall of the locking block contacts the groove wall of the first fixing groove, thereby ensuring the concentricity between the second component and the first component, and at the same time being able to withstand radial shear force.

[0018] Preferably, the axial length of the locking block extending out of the notch of the second fixing groove is smaller than the distance between the top of the locking sleeve and the notch of the first fixing groove.

[0019] The above solution can avoid contact between the bottom of the locking block and the top of the locking sleeve, thereby ensuring that the axial end surface of one side of the second component can contact the axial end surface of one side of the first component.

[0020] Preferably, the inner edge cross-sectional shape of the top of the entry section and the inner edge cross-sectional shape of the top of the locking section are both arc-shaped, and the outer edge cross-sectional shape of the locking protrusion is circular.

[0021] The inner edge cross-sectional shape of the top of the entry section and the inner edge cross-sectional shape of the top of the locking section are both arc-shaped, which can be used to position the locking protrusion; when the locking protrusion is at the top of the locking section, the arc shape can cooperate with the locking protrusion to clamp the locking protrusion, making it difficult for the locking protrusion to slide.

[0022] Preferably, a limiting long hole extending radially and communicating with the positioning hole is provided inside the first component, the limiting long hole also extends along the axial direction of the connecting pin, and the connecting pin is provided with a limiting protrusion extending radially and extending into the limiting long hole.

[0023] The limiting protrusion can prevent the connecting pin from rotating when the second component is screwed, and the limiting long hole also extends along the axial direction of the connecting pin, so that the connecting pin can elastically expand and contract along the axial direction.

[0024] Preferably, the second component body and the first component body are both provided with radially extending exhaust holes, the exhaust holes radially penetrate the outer walls of the second component body and the first component body, and the exhaust holes are respectively communicated with the first fixing groove and the second fixing groove.

[0025] The exhaust hole is used to exhaust air, thereby making it easier to install the locking sleeve and the locking block.

[0026] Preferably, the locking sleeve is provided with a radially extending mounting hole, the mounting hole radially penetrates the outer wall of the locking sleeve, the mounting hole is communicated with the connecting hole, a positioning pin is provided in the mounting hole, and the end of the positioning pin extends into the connecting hole to form the locking protrusion.

[0027] The above arrangement can facilitate the assembly of the locking protrusion.

[0028] The utility model has the following advantages: the second component and the first component are detachably fixed by the winding groove and the locking protrusion. Compared with the screw thread matching method adopted in the reference document, the operator does not need to screw the screw with a screwdriver. The operator can directly screw the second component to complete the disassembly and fixation between the second component and the first component, the locking speed is faster, time is saved, and the surface contact between the second component and the first component can be ensured, thereby ensuring the accuracy and uniform force of the second component, and the concentricity between the second component and the first component is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the utility model.

[0030] Figure 2 It is a schematic diagram of the structure of the locking sleeve and the locking block.

[0031] Figure 3 It is a schematic diagram of the structure of the interior of the locking block and the locking sleeve.

[0032] Figure 4 It is a structural schematic diagram of the lower end of the connecting pin.

[0033] Figure 5 for Figure 1 sectional view of .

[0034] Figure 6 It is a cross-sectional view when the first component and the second component are fixed together.

[0035] Figure 7 for Figure 1 Schematic diagram of the structure after removing the connecting pin.

[0036] Figure numbers: first component 1, exhaust hole 11, second component 2, first fixing groove 21, connecting pin 3, small diameter section 31, large diameter section 32, limiting protrusion 33, elastic member 34, winding hole 4, entry section 41, locking section 42, locking block 5, limiting long hole 51, locking sleeve 6, connecting hole 61, positioning pin 62, locking protrusion 621, connecting hole 7, narrow section 71, wide section 72. DETAILED DESCRIPTION

[0037] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0038] The quick locking structure for shafts of this embodiment is used on a press, wherein the first component 1 is a ram connector for being directly fixed to the press, and the second component 2 is a ram that is connected to the ram connector and is replaceable.

[0039] like Figure 1 , Figure 6 and Figure 7 As shown, this embodiment discloses a quick locking structure for a shaft, comprising a first component 1 for fixing to a press, and the lower end of the first component 1 needs to fix the second component 2. The first component 1 comprises a first component body and a locking block 5, and the second component 2 comprises a second component body and a locking sleeve 6. The first component 1 is provided with a second fixing groove (not shown) opening downward, the locking block 5 is fixed in the second fixing groove, and the lower end of the locking block 5 extends downward to the outside of the notch of the second fixing groove; the second component body is provided with a first fixing groove 21 opening upward, the locking sleeve 6 is fixed in the first fixing groove 21, and the axial length of the locking sleeve 6 is less than the axial depth of the first fixing groove 21. The first component 1 and the second component 2 are both provided with an exhaust hole 11 extending radially along and penetrating the outer wall of the first component 1 and the second component 2, and the exhaust hole 11 is communicated with the first fixing groove 21 and the second fixing groove respectively. The axial length of the locking block 5 extending out of the notch of the second fixing groove is less than the distance between the upper end of the locking sleeve 6 and the notch of the first fixing groove 21. When the second component 2 and the first component 1 are fixed together, the lower end surface of the first component 1 contacts the upper end surface of the second component 2; at the same time, the lower end of the locking block 5 extends into the second fixing groove 21, the lower end outer wall of the locking block 5 contacts the inner wall of the second fixing groove 21, and the lower end surface of the locking block 5 does not contact the upper end surface of the locking sleeve 6.

[0040] like Figure 2 , Figure 3 , Figure 5 and Figure 7As shown, the locking block 5 is provided with a positioning hole 7 which opens downwards. The positioning hole 7 includes a wide section 72 and a narrow section 71 from top to bottom, and a step is formed between the wide section 72 and the narrow section 71. A connecting pin 3 is slidably fitted in the positioning hole 7. The connecting pin 3 includes a large diameter section 32 and a small diameter section 31 from top to bottom. The large diameter section 32 is slidably fitted in the wide section 72, and the small diameter section 31 is slidably fitted with the narrow section 71. An elastic member 34 is sleeved on the outer side of the part of the small diameter section 31 located in the wide section 72. The elastic member 34 is a compression spring. The upper end of the elastic member 34 abuts against the large diameter section 32, and the lower end of the elastic member 34 abuts against the step. The connecting pin 3 has a tendency to move into the positioning hole 7 under the action of the elastic member 34. The locking block 5 is provided with a limiting long hole 51 which extends radially and passes through the outer wall of the locking block 5. The limiting long hole 51 extends along the axial direction of the connecting pin 3. The large diameter section 32 is provided with a radially extending limiting protrusion 33 , which extends into the limiting long hole 51 , and the limiting protrusion 33 and the limiting long hole 51 are slidably matched.

[0041] like Figures 2 to 6 As shown, the locking sleeve 6 is provided with a connection hole 61 which opens upward and cooperates with the small diameter section 31 of the connecting pin 3. The locking sleeve 6 is provided with a mounting hole which extends radially and passes through the outer wall of the locking sleeve 6. The mounting hole is communicated with the connecting hole 61. A positioning pin 62 is provided in the mounting hole. The end of the positioning pin 62 extends into the connecting hole 61 and forms a locking protrusion 621. The lower end of the connecting pin 3 is provided with a winding groove 4 which opens laterally and cooperates with the locking protrusion 621. The winding groove 4 includes an entry section 41 and a locking section 42. The entry section 41 extends along the axial direction of the connecting pin 3 and passes through the bottom of the connecting pin 3. The locking section 42 is arranged in an upwardly inclined manner with the bolt. The lower end of the locking section 42 is communicated with the entry section 41, and the upper end of the locking section 42 is away from the entry section 41. The outer edge cross-sectional shape of the locking protrusion 621 is circular, and the inner edge cross-sectional shape of the upper end of the entry section 41 and the inner edge cross-sectional shape of the upper end of the locking section 42 are both arc-shaped.

[0042] When the second component 2 and the first component 1 need to be replaced, the operator screws the second component 2 clockwise so that the locking protrusion 621 slides from the locking section 42 into the entry section 41, and then the operator can directly move the second component 2 downward to separate the second component from the first component 1. Then the second component 2 to be replaced is placed close to the lower end of the first component 1 so that the connecting pin 3 enters the connecting hole 61, and then the position of the second component 1 is adjusted so that the second component can move upward so that the locking protrusion 621 enters the section 41, and then the second component 1 is screwed clockwise so that the locking protrusion 621 slides into the locking section 42, and finally the replacement of the second component 2 is completed.

Claims

1. A quick locking structure for a shaft, comprising a first component and a second component, wherein an axial end surface of one side of the first component contacts an axial end surface of one side of the second component, characterized in that: The first component is provided with a connecting pin extending toward the second component, and the second component is provided with a connecting hole opening toward the first component and cooperating with the connecting pin; a winding groove with a side opening is provided on the bottom side wall of the connecting pin, and the winding groove includes an entry section and a locking section, the entry section extends along the axial direction of the connecting pin and passes through the bottom of the connecting pin, the locking section is inclined, the bottom of the locking section is connected with the entry section, and the top of the locking section is away from the entry section; a locking protrusion is provided in the connecting hole, which extends radially inward along the connecting hole and slidably cooperates with the winding groove.

2. The quick locking structure for a shaft according to claim 1, characterized in that: The first component is provided with a positioning hole opening toward the second component side, the connecting pin is slidably matched with the positioning hole, an elastic member is provided in the positioning hole, and the connecting pin has a tendency to move into the positioning hole under the action of the elastic member.

3. The quick locking structure for a shaft according to claim 2, characterized in that: The positioning hole includes a narrow section and a wide section in sequence from the opening side of the positioning hole to the bottom side of the positioning hole, and a step is formed between the wide section and the narrow section. The connecting pin includes a small diameter section and a large diameter section in sequence from the opening side of the positioning hole to the bottom side of the positioning hole. The narrow section slides in cooperation with the small diameter section, and the wide section slides in cooperation with the large diameter section. The elastic member is sleeved on the outer wall of the small diameter section located in the wide section, and the two ends of the elastic member are respectively in contact with the bottom of the large diameter section and the step.

4. The quick locking structure for a shaft according to claim 1, characterized in that: The second component includes a second component body and a locking sleeve, the first component includes a first component body and a locking block, the locking sleeve is provided with the connecting hole, and the locking block is provided with the connecting pin; the second component body is provided with a first fixing groove opening toward the first component side, the locking sleeve is fixed in the first fixing groove, and the axial depth of the first fixing groove is greater than the axial length of the locking sleeve; the first component body is provided with a second fixing groove opening toward the second component side, the locking block is fixed in the second fixing groove, the axial length of the locking block is greater than the axial depth of the second fixing groove, one end of the locking block extends into the first fixing groove and the outer wall of the locking block contacts the groove wall of the first fixing groove.

5. The quick locking structure for a shaft according to claim 4, characterized in that: The axial length of the locking block extending out of the notch of the second fixing groove is less than the distance between the top of the locking sleeve and the notch of the first fixing groove.

6. The quick locking structure for a shaft according to any one of claims 1 to 5, characterized in that: The inner edge cross-sectional shape of the top of the entry section and the inner edge cross-sectional shape of the top of the locking section are both arc-shaped, and the outer edge cross-sectional shape of the locking protrusion is circular.

7. The quick locking structure for a shaft according to any one of claims 1 to 5, characterized in that: A radially extending long limiting hole communicating with the positioning hole is provided inside the first component. The long limiting hole also extends along the axial direction of the connecting pin. The connecting pin is provided with a radially extending limiting protrusion extending into the long limiting hole.

8. The quick locking structure for a shaft according to claim 4, characterized in that: The second component body and the first component body are both provided with radially extending exhaust holes, the exhaust holes radially penetrate the outer walls of the second component body and the first component body, and the exhaust holes are communicated with the first fixing groove and the second fixing groove respectively.

9. The quick locking structure for a shaft according to claim 4 or 5, characterized in that: The locking sleeve is provided with a radially extending mounting hole, the mounting hole radially penetrates the outer wall of the locking sleeve, the mounting hole is communicated with the connecting hole, a positioning pin is provided in the mounting hole, and the end of the positioning pin extends into the connecting hole to form the locking protrusion.

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